EP0786596A1 - Peristaltic pump - Google Patents

Peristaltic pump Download PDF

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Publication number
EP0786596A1
EP0786596A1 EP97460007A EP97460007A EP0786596A1 EP 0786596 A1 EP0786596 A1 EP 0786596A1 EP 97460007 A EP97460007 A EP 97460007A EP 97460007 A EP97460007 A EP 97460007A EP 0786596 A1 EP0786596 A1 EP 0786596A1
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EP
European Patent Office
Prior art keywords
cam
rotor
peristaltic pump
lever
pipes
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
EP97460007A
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German (de)
French (fr)
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EP0786596B1 (en
Inventor
Bernard Leilde
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Institut Francais de Recherche pour lExploitation de la Mer (IFREMER)
Original Assignee
Institut Francais de Recherche pour lExploitation de la Mer (IFREMER)
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Publication of EP0786596A1 publication Critical patent/EP0786596A1/en
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Publication of EP0786596B1 publication Critical patent/EP0786596B1/en
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B43/00Machines, pumps, or pumping installations having flexible working members
    • F04B43/12Machines, pumps, or pumping installations having flexible working members having peristaltic action
    • F04B43/1253Machines, pumps, or pumping installations having flexible working members having peristaltic action by using two or more rollers as squeezing elements, the rollers moving on an arc of a circle during squeezing
    • F04B43/1292Pumps specially adapted for several tubular flexible members
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B43/00Machines, pumps, or pumping installations having flexible working members
    • F04B43/12Machines, pumps, or pumping installations having flexible working members having peristaltic action
    • F04B43/1253Machines, pumps, or pumping installations having flexible working members having peristaltic action by using two or more rollers as squeezing elements, the rollers moving on an arc of a circle during squeezing
    • F04B43/1284Means for pushing the backing-plate against the tubular flexible member

Definitions

  • the present invention relates to the field of peristaltic pumps in general.
  • peristaltic pumps have a serious disadvantage in that when the hose is stopped, it remains crushed. Under these conditions, the flexible pipe will more or less quickly retain a permanent deformation which will distort the flow.
  • a known solution consists in releasing the flexible hose outside of the periods of operation, by manual spacing of a cam with which the rollers cooperate to crush the hose. Each time the pump is restarted, the cam must first be reset manually.
  • the invention was carried out with the triple aim of making it possible remotely the function of relaxation and return to operating condition of the flexible hose of a peristaltic pump, of automating this function in such a way that it is systematically implemented. works for each stop and restart of the pump, and to design a simple and reliable device.
  • Another sought-after goal has been to provide for this device to be easily adaptable to existing pump models.
  • the invention therefore consists of a peristaltic pump comprising at least one flexible pipe engaged around a rotor whose periphery ensures the crushing of said pipe against a corresponding cam, characterized in that said cam has a pivoting ability allowing its surface active is moved away from the periphery of said rotor to ensure the release of said flexible pipe, and in that the positioning of said cam in operating condition and its release are ensured by a control mechanism comprising a friction clutch, which friction clutch is mounted on a pinion driven at the same time as said rotor, so that if the rotor turns in the operating direction of the pump, the cam is brought into operating position and maintained in this position by a force resulting at least mainly from the resisting clutch torque, and that if the rotor turns in the other direction, the cam is released by said mechanism, so that the flexible hose is released.
  • said cam is pivoted to the operating position by a lever itself pivotally mounted between two positions defined by stops.
  • the support between said lever and the cam is made by means of an additional adjustable element, which in particular allows adaptation to the same location in the same material of pipes of different diameters. In a simple form, it is a finger mounted with adjustment capacity in said lever.
  • a single lever can control a plurality of cams each associated with a flexible tube.
  • the pump comprises two groups of flexible pipes mounted on the same rotor, the two groups working in opposite directions, an arrangement can be provided according to the invention for each group, so that when the pipes of one are released , the pipes of the other are in the constrained state of operation and vice versa.
  • Figs. 1 and 2 illustrate the general principle of the invention. They represent a peristaltic pump 1, the main elements of which are mounted on a flat support 2. It is first of all a rotor 3 of generally cylindrical shape, the periphery of which comprises a regular succession of identical rollers 30 oriented axially and freely mounted in rotation on themselves. The rotor 3 is integral in rotation with a shaft 4 driven by a motor, not shown.
  • a flexible pipe 5 partially surrounds the rotor 3, in contact with the rollers 30. Beyond its part 50 surrounding the rotor 3, its inlet and outlet strands, respectively 51 and 52, are engaged in retaining blocks 6 fixed on the support 2.
  • the part 50 of the pipe 5 in contact with the rotor 3 is bordered externally by the cylindrical surface 70 of a cam 7 facing the rollers 30.
  • the cam 7 is articulated around an axis 8 mounted perpendicularly on the support 2. Being brought closer to the rollers 30, it constrains with them the pipe 5 along the length of its part 50, so that at the right of each roller 30, the pipe 5 is crushed on itself.
  • the pipe 5 is released by pivoting of the cam 7 opposite the rotor 3.
  • the cam 7 is pivotally driven by means of a mechanism comprising a friction clutch mounted on a pinion driven in rotation by the shaft 4.
  • the pinion designated by the reference 9 is mounted on the axis 8 of articulation of the cam 7. It is meshed with a pinion 10 integral in rotation with the shaft 4.
  • the pinion 9 is coupled via a friction clutch 11 with a crank washer 12.
  • the friction clutch 11 advantageously consists of one or more wavy washers interposed on the axis 8 between the pinion 9 and the crank washer 12, the adjustment of the friction being able to be carried out by means of a nut assembly lock nut 13.
  • the crank washer 12 is preferably a clevis washer.
  • the crank washer 12 is connected by means of a connecting rod 14 to a lever 15 acting on the cam 7. More specifically, the lever 15 is placed behind the cam 7 relative to the rotor 3, to cooperate with the back 71 of it.
  • the lever 15 is articulated around an axis 16 close to the end of the cam 7 distant from its articulation axis 8. From preferably, the support between the lever 15 and the cam 7 is made by means of a finger 17 adjustable in length, integral with the lever 15. It is in practice a screw passing through the lever 15.
  • the lever 15 has a pivoting ability about the axis 16, limited in both directions by a stop system 18, which here consists of a finger secured to the lever 15 engaged in a cavity of the support 2, so that it can only move between the opposite edges of it.
  • a stop system 18 which here consists of a finger secured to the lever 15 engaged in a cavity of the support 2, so that it can only move between the opposite edges of it.
  • connection via the link 14 between the lever 15 and the crank washer 12 is such that at the end of bringing the lever 15 into one or other of its extreme positions of pivoting by the washer-crank 12, there is locking in rotation thereof as the direction of rotation of the pinion 9 remains unchanged.
  • the lever 15 is brought into the limit pivoting position opposite the rotor 3 by rotation of the washer-crank 12 counterclockwise.
  • the articulation 120 between the link 14 and the crank washer 12 is slightly below the three o'clock hourly position on the latter while the crank arm and the link 14 make an angle less than 180 ° open up. Consequently, the articulation 120 cannot go further towards the three o'clock position, so that the crank washer 12 locks in rotation, the clutch 11 then sliding while the pinion 9 continues to rotate counterclockwise. .
  • the pump according to the invention is in the state shown in FIG. 1.
  • the lever 15 is in its extreme pivoting position opposite the rotor 3, so that the released cam 7 is spaced from the rollers 30. Between these and the cam 7, the pipe 5 is not constrained and therefore it has a normal section over its entire length.
  • the pump stop command causes the motor to stop, followed by a brief restart in the opposite direction. Consequently, the pinion 9 rotating clockwise will stop to start again for a moment counterclockwise, FIG. 1. In doing so, it drives the crank washer 12, which in turn drives the lever 15 through its connecting rod 14 in its extreme pivoting position opposite the rotor 3.
  • the cam 7 thus released s' away from the rotor 3 under the effect of the reaction of the pipe 5 resuming its shape in line with the rollers 30.
  • Fig. 3 shows a pump according to the invention operating in exactly the same way as that which has been described previously. It differs from this in that it is multi-channel, namely that instead of a single pipe 5, it includes several which are mounted in parallel around the rotor 3. Each pipe 5 corresponds to a particular cam 7a to 7g, the cams 7a to 7g being identical and articulated on the same axis 8.
  • the set of cams 7a to 7g are maneuvered by a single lever 15, provided however with an adjusting finger 17 for each cam. It is therefore possible to adjust each cam individually, or even to neutralize one or more channels by total retraction in the lever 15 of the corresponding finger or fingers 17. It will be noted that a simpler version may have only one cam for all of the pipes.
  • the pump shown in Fig. 4 operates bidirectionally. Like that of FIG. 3, it is multi-channel and with each pipe 5 is associated a particular cam 7h to 7m.
  • the pipes 5 and the cams 7h to 7m form two groups adjacent to each of which are assigned on its free side a lever 15a, 15b and its drive system which are as previously described.
  • the two drive systems operate in opposition, so that for one direction of rotation of the rotor 3, one group of pipes is constrained and the other released, and that for the opposite direction of rotation, the situation is reversed.
  • there can again be a means of adjustment specific to each cam as in a simplified version, there can be only one cam per group of pipes 5, as there can also have only one hose 5 per group.
  • the pump stop command can be programmed in such a way that the two groups of pipes are released each time they stop.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)

Abstract

The pump consists of a flexible pipe (5) fitted round a rotor (3) which compresses it against a cam (7). The cam is able to pivot to vary the pressure on the pipe, and is controlled by a friction clutch (11) mounted on a pinion (9). The pinion is coupled with the rotor drive. The cam is pressed towards the rotor when the rotor turns in one direction and moves away from it in the other direction. The position of the cam is controlled by a lever (15) mounted behind it. The lever is pivoted at a point (16) close to the cam and can be adjusted to suit flexible pipes of different diameters. The pump can be made with a series of parallel flexible pipes round the rotor, at least one cam and a single control mechanism.

Description

La présente invention concerne le domaine des pompes péristaltiques en général.The present invention relates to the field of peristaltic pumps in general.

Le fonctionnement de ces pompes repose sur le principe de l'écrasement d'un tuyau souple au moyen de rouleaux ou galets successifs agencés à la périphérie d'un rotor, ou bien au moyen du rotor lui-même agissant par sa surface périphérique qui forme alors une succession de cames. Elles regroupent un certain nombre de qualités qui les rendent particulièrement adaptées pour des applications dans des systèmes de dosage ou d'analyse, en chimie fine, pharmacie, biologie, etc. Parmi ces qualités, sont notamment remarquables la souplesse d'utilisation, la fiabilité, le besoin de maintenance quasiment nul, la facilité de nettoyage, la précision du débit sur une plage étendue.The operation of these pumps is based on the principle of crushing a flexible pipe by means of successive rollers or rollers arranged at the periphery of a rotor, or else by means of the rotor itself acting by its peripheral surface which forms then a succession of cams. They combine a certain number of qualities which make them particularly suitable for applications in assay or analysis systems, in fine chemistry, pharmacy, biology, etc. Among these qualities, are notably remarkable the flexibility of use, the reliability, the need for almost zero maintenance, the ease of cleaning, the precision of the flow over a wide range.

Les pompes péristaltiques présentent toutefois un grave inconvénient en ce qu'à l'arrêt, le tuyau souple demeure écrasé. Dans ces conditions, le tuyau souple va plus ou moins rapidement conserver une déformation permanente qui faussera le débit.However, peristaltic pumps have a serious disadvantage in that when the hose is stopped, it remains crushed. Under these conditions, the flexible pipe will more or less quickly retain a permanent deformation which will distort the flow.

Une solution connue consiste à relâcher le tuyau souple en dehors des périodes de fonctionnement, par écartement manuel d'une came avec laquelle coopérent les galets pour écraser le tuyau. A chaque remise en marche de la pompe, il faut au préalable réenclencher manuellement la came.A known solution consists in releasing the flexible hose outside of the periods of operation, by manual spacing of a cam with which the rollers cooperate to crush the hose. Each time the pump is restarted, the cam must first be reset manually.

Cette solution ne vaut donc que pour les pompes très facilement accessibles. Dans tous les autres cas, c'est-à-dire si la pompe est intégrée à l'intérieur d'un ensemble, ou bien si elle se trouve dans un site isolé, soit par exemple dans une installation sous-marine, l'inconvénient demeure et conduit à utiliser d'autres types de pompes, même si globalement, elles répondent moins bien aux exigences de l'application.This solution therefore only applies to very easily accessible pumps. In all other cases, i.e. if the pump is integrated inside an assembly, or if it is in a site isolated, or for example in an underwater installation, the drawback remains and leads to the use of other types of pumps, even if overall, they meet the requirements of the application less well.

L'invention a été réalisée dans le triple but de rendre possible à distance la fonction de relâchement et de remise en situation de fonctionnement du tuyau souple d'une pompe péristaltique, d'automatiser cette fonction de telle manière qu'elle soit systématiquement mise en oeuvre pour chaque arrêt et remise en route de la pompe, et de concevoir un dispositif simple et fiable.The invention was carried out with the triple aim of making it possible remotely the function of relaxation and return to operating condition of the flexible hose of a peristaltic pump, of automating this function in such a way that it is systematically implemented. works for each stop and restart of the pump, and to design a simple and reliable device.

Un autre but recherché a été de prévoir que ce dispositif soit aisément adaptable sur des modèles de pompe existants.Another sought-after goal has been to provide for this device to be easily adaptable to existing pump models.

L'invention consiste donc en une pompe péristaltique comportant au moins un tuyau souple engagé autour d'un rotor dont la périphérie assure l'écrasement dudit tuyau contre une came correspondante, caractérisée en ce que ladite came a une aptitude en pivotement permettant que sa surface active soit écartée de la périphérie dudit rotor pour assurer le relâchement dudit tuyau souple, et en ce que le positionnement de ladite came en état de fonctionnement et sa libération sont assurés par un mécanisme de commande comportant un embrayage à friction, lequel embrayage à friction est monté sur un pignon entraîné en même temps que ledit rotor, de telle sorte que si le rotor tourne dans le sens de fonctionnement de la pompe, la came est amenée en position de fonctionnement et maintenue dans cette position par une force résultant au moins principalement du couple résistant de l'embrayage, et que si le rotor tourne dans l'autre sens, la came est libérée par ledit mécanisme, de telle manière que le tuyau souple est relâché.The invention therefore consists of a peristaltic pump comprising at least one flexible pipe engaged around a rotor whose periphery ensures the crushing of said pipe against a corresponding cam, characterized in that said cam has a pivoting ability allowing its surface active is moved away from the periphery of said rotor to ensure the release of said flexible pipe, and in that the positioning of said cam in operating condition and its release are ensured by a control mechanism comprising a friction clutch, which friction clutch is mounted on a pinion driven at the same time as said rotor, so that if the rotor turns in the operating direction of the pump, the cam is brought into operating position and maintained in this position by a force resulting at least mainly from the resisting clutch torque, and that if the rotor turns in the other direction, the cam is released by said mechanism, so that the flexible hose is released.

Il suffit donc de prévoir, au niveau de la commande de la pompe, que l'arrêt de celle-ci soit suivi d'un bref redémarrage du moteur dans le sens inverse du sens de fonctionnement pour que le tuyau souple soit relâché, tandis que dès la remise en marche de la pompe, le tuyau redevient fonctionnellement contraint entre la périphérie du rotor et la came.It is therefore sufficient to provide, at the level of the pump control, for the latter to be stopped followed by a brief restart of the motor in the opposite direction to the operating direction so that the flexible hose is released, while as soon as the pump is restarted, the pipe becomes functionally constrained again between the periphery of the rotor and the cam.

Dans une forme de réalisation de l'invention, ladite came est entraînée en pivotement vers la position de fonctionnement par un levier lui-même monté pivotant entre deux positions définies par des butées. De préférence, l'appui entre ledit levier et la came se fait par l'intermédiaire d'un élément supplémentaire réglable, qui permet notamment l'adaptation à un même emplacement dans un même matériel de tuyaux de différents diamètres. Dans une forme simple, il s'agit d'un doigt monté avec capacité de réglage dans ledit levier.In one embodiment of the invention, said cam is pivoted to the operating position by a lever itself pivotally mounted between two positions defined by stops. Preferably, the support between said lever and the cam is made by means of an additional adjustable element, which in particular allows adaptation to the same location in the same material of pipes of different diameters. In a simple form, it is a finger mounted with adjustment capacity in said lever.

Dans le cas d'une pompe comportant une pluralité de tuyaux souples montés en parallèle sur un même rotor, un levier unique peut commander une pluralité de cames associées chacune à un tube souple.In the case of a pump comprising a plurality of flexible pipes mounted in parallel on the same rotor, a single lever can control a plurality of cams each associated with a flexible tube.

Si la pompe comporte deux groupes de tuyaux souples montés sur un même rotor, les deux groupes fonctionnant en sens opposés, il peut être prévu un agencement selon l'invention pour chaque groupe, de telle manière que lorsque les tuyaux de l'un sont relâchés, les tuyaux de l'autre sont à l'état contraint de fonctionnement et vice versa.If the pump comprises two groups of flexible pipes mounted on the same rotor, the two groups working in opposite directions, an arrangement can be provided according to the invention for each group, so that when the pipes of one are released , the pipes of the other are in the constrained state of operation and vice versa.

Ces caractéristiques et avantages de l'invention, ainsi que d'autres, apparaîtront plus clairement à la lecture de la description suivante, faite en relation avec les dessins joints, dans lesquels :

  • la Fig. 1 est une vue schématique en plan d'une pompe péristaltique selon l'invention au repos ;
  • la Fig. 2 est une vue semblable à la Fig. 1, illustrant la même pompe en fonctionnement ;
  • la Fig. 3 est une vue schématique de côté, partiellement en coupe, d'une pompe péristaltique selon l'invention comportant plusieurs tuyaux montés en parallèle, et
  • la Fig. 4 est une vue schématique de côté d'une pompe péristaltique selon l'invention à usage bidirectionnel, comprenant deux groupes de tuyaux montés en parallèle.
These characteristics and advantages of the invention, as well as others, will appear more clearly on reading the following description, given in relation to the accompanying drawings, in which:
  • Fig. 1 is a schematic plan view of a peristaltic pump according to the invention at rest;
  • Fig. 2 is a view similar to FIG. 1, illustrating the same pump in operation;
  • Fig. 3 is a schematic side view, partially in section, of a peristaltic pump according to the invention comprising several pipes mounted in parallel, and
  • Fig. 4 is a schematic side view of a peristaltic pump according to the invention for bidirectional use, comprising two groups of pipes mounted in parallel.

Dans l'ensemble des dessins, les mêmes références désignent partout les mêmes éléments.Throughout the drawings, the same references designate the same elements everywhere.

Les Figs. 1 et 2 illustrent le principe général de l'invention. Elles représentent une pompe péristaltique 1 dont les principaux éléments sont montés sur un support plan 2. Il s'agit tout d'abord d'un rotor 3 de forme générale cylindrique, dont la périphérie comporte une succession régulière de rouleaux identiques 30 orientés axialement et montés libres en rotation sur eux-mêmes. Le rotor 3 est solidaire en rotation d'un arbre 4 entraîné par un moteur, non montré.Figs. 1 and 2 illustrate the general principle of the invention. They represent a peristaltic pump 1, the main elements of which are mounted on a flat support 2. It is first of all a rotor 3 of generally cylindrical shape, the periphery of which comprises a regular succession of identical rollers 30 oriented axially and freely mounted in rotation on themselves. The rotor 3 is integral in rotation with a shaft 4 driven by a motor, not shown.

Un tuyau souple 5 entoure partiellement le rotor 3, au contact des rouleaux 30. Au-delà de sa partie 50 entourant le rotor 3, ses brins d'admission et de refoulement, respectivement 51 et 52, sont engagés dans des blocs de retenue 6 fixés sur le support 2.A flexible pipe 5 partially surrounds the rotor 3, in contact with the rollers 30. Beyond its part 50 surrounding the rotor 3, its inlet and outlet strands, respectively 51 and 52, are engaged in retaining blocks 6 fixed on the support 2.

La partie 50 du tuyau 5 au contact du rotor 3 est bordée extérieurement par la surface cylindrique 70 d'une came 7 faisant face aux rouleaux 30. La came 7 est articulée autour d'un axe 8 monté perpendiculairement sur le support 2. En étant rappprochée des rouleaux 30, elle contraint avec ceux-ci le tuyau 5 sur la longueur de sa partie 50, de telle façon qu'au droit de chaque rouleau 30, le tuyau 5 est écrasé sur lui-même. Le tuyau 5 est relâché par pivotement de la came 7 à l'opposé du rotor 3.The part 50 of the pipe 5 in contact with the rotor 3 is bordered externally by the cylindrical surface 70 of a cam 7 facing the rollers 30. The cam 7 is articulated around an axis 8 mounted perpendicularly on the support 2. Being brought closer to the rollers 30, it constrains with them the pipe 5 along the length of its part 50, so that at the right of each roller 30, the pipe 5 is crushed on itself. The pipe 5 is released by pivoting of the cam 7 opposite the rotor 3.

Selon l'invention, la came 7 est entraînée en pivotement au moyen d'un mécanisme comportant un embrayage à friction monté sur un pignon entraîné en rotation par l'arbre 4. Dans l'exemple de réalisation montré, le pignon désigné par le repère 9 est monté sur l'axe 8 d'articulation de la came 7. Il est engrené avec un pignon 10 solidaire en rotation de l'arbre 4.According to the invention, the cam 7 is pivotally driven by means of a mechanism comprising a friction clutch mounted on a pinion driven in rotation by the shaft 4. In the embodiment shown, the pinion designated by the reference 9 is mounted on the axis 8 of articulation of the cam 7. It is meshed with a pinion 10 integral in rotation with the shaft 4.

Le pignon 9 est couplé par l'intermédiaire d'un embayage à friction 11 avec une rondelle-manivelle 12. Comme l'illustrent les Figs. 3 et 4, l'embrayage à friction 11 consiste avantageusement en une ou plusieurs rondelles ondulées interposées sur l'axe 8 entre le pignon 9 et la rondelle-manivelle 12, le réglage de la friction pouvant être effectué au moyen d'un ensemble écrou-contre-écrou 13. La rondelle-manivelle 12 est de préférence une rondelle-chape.The pinion 9 is coupled via a friction clutch 11 with a crank washer 12. As illustrated in FIGS. 3 and 4, the friction clutch 11 advantageously consists of one or more wavy washers interposed on the axis 8 between the pinion 9 and the crank washer 12, the adjustment of the friction being able to be carried out by means of a nut assembly lock nut 13. The crank washer 12 is preferably a clevis washer.

La rondelle-manivelle 12 est reliée par l'intermédiaire d'une biellette 14 à un levier 15 agissant sur la came 7. Plus précisément, le levier 15 est placé derrière la came 7 par rapport au rotor 3, pour coopérer avec le dos 71 de celle-ci. Le levier 15 est articulé autour d'un axe 16 voisin de l'extrémité de la came 7 distante de son axe d'articulation 8. De préférence, l'appui entre le levier 15 et la came 7 se fait par l'intermédiaire d'un doigt 17 réglable en longueur, solidaire du levier 15. Il s'agit en pratique d'une vis traversant le levier 15.The crank washer 12 is connected by means of a connecting rod 14 to a lever 15 acting on the cam 7. More specifically, the lever 15 is placed behind the cam 7 relative to the rotor 3, to cooperate with the back 71 of it. The lever 15 is articulated around an axis 16 close to the end of the cam 7 distant from its articulation axis 8. From preferably, the support between the lever 15 and the cam 7 is made by means of a finger 17 adjustable in length, integral with the lever 15. It is in practice a screw passing through the lever 15.

Le levier 15 a une aptitude de pivotement autour de l'axe 16, limitée dans les deux sens par un système de butée 18, lequel consiste ici en un doigt solidaire du levier 15 engagé dans une cavité du support 2, de telle manière qu'il ne puisse se déplacer qu'entre les bords opposés de celle-ci.The lever 15 has a pivoting ability about the axis 16, limited in both directions by a stop system 18, which here consists of a finger secured to the lever 15 engaged in a cavity of the support 2, so that it can only move between the opposite edges of it.

D'autre part, la liaison par l'intermédiaire de la biellette 14 entre le levier 15 et la rondelle-manivelle 12 est telle qu'en fin d'amenée du levier 15 dans l'une ou l'autre de ses positions extrêmes de pivotement par la rondelle-manivelle 12, il y a blocage en rotation de celle-ci tant que le sens de rotation du pignon 9 reste inchangé. On voit à la Fig. 1 que le levier 15 est amené en position de pivotement limite à l'opposé du rotor 3 par rotation de la rondelle-manivelle 12 dans le sens antihoraire. Pour cette position limite, l'articulation 120 entre la biellette 14 et la rondelle-manivelle 12 est légèrement en dessous de la position horaire de trois heures sur cette dernière tandis que le bras de manivelle et la biellette 14 font un angle inférieur à 180° ouvert vers le haut. Par conséquent, l'articulation 120 ne peut aller plus loin vers la position de trois heures, de sorte que la rondelle-manivelle 12 se bloque en rotation, l'embrayage 11 glissant alors tant que le pignon 9 continue à tourner dans le sens antihoraire.On the other hand, the connection via the link 14 between the lever 15 and the crank washer 12 is such that at the end of bringing the lever 15 into one or other of its extreme positions of pivoting by the washer-crank 12, there is locking in rotation thereof as the direction of rotation of the pinion 9 remains unchanged. We see in Fig. 1 that the lever 15 is brought into the limit pivoting position opposite the rotor 3 by rotation of the washer-crank 12 counterclockwise. For this limiting position, the articulation 120 between the link 14 and the crank washer 12 is slightly below the three o'clock hourly position on the latter while the crank arm and the link 14 make an angle less than 180 ° open up. Consequently, the articulation 120 cannot go further towards the three o'clock position, so that the crank washer 12 locks in rotation, the clutch 11 then sliding while the pinion 9 continues to rotate counterclockwise. .

A la Fig. 2, pour la position de pivotement extrême du levier 15 vers le rotor 3, l'articulation 120 se trouve au voisinage de la position horaire de six heures sur la rondelle-manivelle 12. Elle ne peut se déplacer au-delà dans le sens horaire, de sorte que lorsque cette position est atteinte, la rondelle-manivelle 12 se bloque en rotation, l'embrayage 11 glissant dès lors tant que le pignon 9 continue à tourner dans le même sens, c'est-à-dire le sens horaire. Par contre, pour toute inversion du sens de rotation du pignon 9, l'articulation 120 se déplace immédiatement de l'une à l'autre de ses positions limites.In Fig. 2, for the extreme pivoting position of the lever 15 towards the rotor 3, the articulation 120 is located in the vicinity of the time position of six hours on the crank washer 12. It cannot move beyond it clockwise, so that when this position is reached, the crank washer 12 locks in rotation, the clutch 11 therefore sliding as long as the pinion 9 continues to rotate in the same direction, that is to say clockwise. On the other hand, for any reversal of the direction of rotation of the pinion 9, the joint 120 immediately moves from one to the other of its limit positions.

Au repos, la pompe selon l'invention est dans l'état représenté à la Fig. 1. Le levier 15 est dans sa position extrême de pivotement à l'opposé du rotor 3, de sorte que la came 7 libérée est écartée des rouleaux 30. Entre ceux-ci et la came 7, le tuyau 5 n'est pas contraint et il présente donc une section normale sur toute sa longueur.At rest, the pump according to the invention is in the state shown in FIG. 1. The lever 15 is in its extreme pivoting position opposite the rotor 3, so that the released cam 7 is spaced from the rollers 30. Between these and the cam 7, the pipe 5 is not constrained and therefore it has a normal section over its entire length.

Lors du démarrage de la pompe, par mise en rotation dans le sens antihoraire de l'arbre 4, Fig. 2, le pignon 9 est entraîné dans le sens horaire, et avec lui la rondelle-manivelle 12 qui amène par l'intermédiaire de la biellette 14 le levier 15 dans sa position extrême de pivotement vers le rotor 3. Le levier 15, par son doigt 17, rapproche la came 7 du rotor 3. Entre la surface active 70 de la came 7 et les rouleaux 30 lui faisant face, le tuyau 5 se trouve écrasé, de sorte que la pompe fonctionne. La force d'application de la came 7 sur le tuyau 5 résulte du couple résistant de l'embrayage agissant sur le levier 15. Si nécessaire, il peut être prévu en outre un ressort de rappel 19 monté entre le levier 15 et le support 2.When starting the pump, by rotating it counterclockwise from the shaft 4, Fig. 2, the pinion 9 is driven clockwise, and with it the crank washer 12 which brings, by means of the connecting rod 14, the lever 15 into its extreme pivoting position towards the rotor 3. The lever 15, by its finger 17, brings the cam 7 closer to the rotor 3. Between the active surface 70 of the cam 7 and the rollers 30 facing it, the pipe 5 is crushed, so that the pump operates. The application force of the cam 7 on the pipe 5 results from the resisting torque of the clutch acting on the lever 15. If necessary, a return spring 19 can be provided, mounted between the lever 15 and the support 2 .

La commande d'arrêt de la pompe provoque l'arrêt du moteur, suivi d'un bref redémarrage en sens inverse. Par conséquent, le pignon 9 tournant dans le sens horaire va s'arrêter pour repartir l'espace d'un instant dans le sens antihoraire, Fig. 1. Ce faisant, il entraîne la rondelle-manivelle 12, qui entraîne à son tour par l'intermédiaire de la biellette 14 le levier 15 dans sa position extrême de pivotement à l'opposé du rotor 3. La came 7 ainsi libérée s'écarte du rotor 3 sous l'effet de la réaction du tuyau 5 reprenant sa forme au droit des rouleaux 30.The pump stop command causes the motor to stop, followed by a brief restart in the opposite direction. Consequently, the pinion 9 rotating clockwise will stop to start again for a moment counterclockwise, FIG. 1. In doing so, it drives the crank washer 12, which in turn drives the lever 15 through its connecting rod 14 in its extreme pivoting position opposite the rotor 3. The cam 7 thus released s' away from the rotor 3 under the effect of the reaction of the pipe 5 resuming its shape in line with the rollers 30.

La Fig. 3 représente une pompe selon l'invention fonctionnant exactement de la même façon que celle qui a été décrite précédemment. Elle diffère de celle-ci en ce qu'elle est multi-canaux, à savoir qu'au lieu d'un tuyau unique 5, elle en comprend plusieurs qui sont montés en parallèle autour du rotor 3. A chaque tuyau 5, correspond une came particulière 7a à 7g, les cames 7a à 7g étant identiques et articulées sur le même axe 8. L'ensemble des cames 7a à 7g sont manoeuvrées par un levier unique 15, pourvu toutefois d'un doigt de réglage 17 pour chaque came. On peut donc régler individuellement chaque came, voire même neutraliser un ou plusieurs canaux par escamotage total dans le levier 15 du ou des doigts correspondants 17. On notera qu'une version plus simple pourra ne comporter qu'une seule came pour l'ensemble des tuyaux.Fig. 3 shows a pump according to the invention operating in exactly the same way as that which has been described previously. It differs from this in that it is multi-channel, namely that instead of a single pipe 5, it includes several which are mounted in parallel around the rotor 3. Each pipe 5 corresponds to a particular cam 7a to 7g, the cams 7a to 7g being identical and articulated on the same axis 8. The set of cams 7a to 7g are maneuvered by a single lever 15, provided however with an adjusting finger 17 for each cam. It is therefore possible to adjust each cam individually, or even to neutralize one or more channels by total retraction in the lever 15 of the corresponding finger or fingers 17. It will be noted that a simpler version may have only one cam for all of the pipes.

La pompe illustrée à la Fig. 4 fonctionne de façon bidirectionnelle. Comme celle de la Fig. 3, elle est multi-canaux et à chaque tuyau 5 est associée une came particulière 7h à 7m. Les tuyaux 5 et les cames 7h à 7m forment deux groupes adjacents à chacun desquels sont affectés sur son côté libre un levier 15a, 15b et son système d'entraînement qui sont tels que précédemment décrit. Les deux systèmes d'entraînement fonctionnent en opposition, si bien que pour un sens de rotation du rotor 3, un groupe de tuyaux est contraint et l'autre relâché, et que pour le sens de rotation opposé, la situation est inversée. Bien entendu, on peut disposer là encore d'un moyen de réglage propre à chaque came, de même que dans une version simplifiée, il peut n'y avoir qu'une seule came par groupe de tuyaux 5, comme il peut n'y avoir également qu'un seul tuyau 5 par groupe.The pump shown in Fig. 4 operates bidirectionally. Like that of FIG. 3, it is multi-channel and with each pipe 5 is associated a particular cam 7h to 7m. The pipes 5 and the cams 7h to 7m form two groups adjacent to each of which are assigned on its free side a lever 15a, 15b and its drive system which are as previously described. The two drive systems operate in opposition, so that for one direction of rotation of the rotor 3, one group of pipes is constrained and the other released, and that for the opposite direction of rotation, the situation is reversed. Of course, there can again be a means of adjustment specific to each cam, as in a simplified version, there can be only one cam per group of pipes 5, as there can also have only one hose 5 per group.

Lorsque la pompe bidirectionnelle de la Fig. 4 n'est pas en service, un groupe de tuyaux demeure cependant contraint. Pour pallier au mieux cet inconvénient, la commande d'arrêt de la pompe pourra être programmée de telle manière que les deux groupes de tuyaux soient relâchés à l'arrêt chacun leur tour.When the bidirectional pump of FIG. 4 is not in service, a group of pipes remains constrained. To best overcome this drawback, the pump stop command can be programmed in such a way that the two groups of pipes are released each time they stop.

Claims (10)

Pompe péristaltique comportant au moins un tuyau souple (5) engagé autour d'un rotor (3) dont la périphérie (30) assure l'écrasement dudit tuyau (5) contre une came correspondante (7), caractérisée en ce que ladite came (7) a une aptitude en pivotement permettant que sa surface active (70) soit écartée de la périphérie (30) du rotor (3) pour assurer le relâchement dudit tuyau souple (5), et en ce que le positionnement de ladite came (7) en état de fonctionnement et sa libération sont assurés par un mécanisme de commande (9-15) comportant un embrayage à friction (11), lequel embrayage à friction (11) est monté sur un pignon (9) entraîné en même temps que ledit rotor (3), de telle sorte que si le rotor tourne dans le sens de fonctionnement de la pompe, la came est amenée en position de fonctionnement et maintenue dans cette position par une force résultant au moins principalement du couple résistant de l'embrayage (11), et que si le rotor tourne dans l'autre sens, la came est libérée par ledit mécanisme, de telle manière que le tuyau souple (5) est relâché.Peristaltic pump comprising at least one flexible pipe (5) engaged around a rotor (3) whose periphery (30) ensures the crushing of said pipe (5) against a corresponding cam (7), characterized in that said cam ( 7) has a pivoting ability allowing its active surface (70) to be spaced from the periphery (30) of the rotor (3) to ensure the relaxation of said flexible pipe (5), and in that the positioning of said cam (7 ) in operating condition and its release are ensured by a control mechanism (9-15) comprising a friction clutch (11), which friction clutch (11) is mounted on a pinion (9) driven at the same time as said rotor (3), so that if the rotor turns in the operating direction of the pump, the cam is brought into the operating position and held in this position by a force resulting at least mainly from the resisting torque of the clutch ( 11), and that if the rotor turns in the other direction , the cam is released by said mechanism, so that the flexible hose (5) is released. Pompe péristaltique selon la revendication 1, caractérisé en ce que ledit mécanisme de commande comprend un levier (15) monté derrière ladite came (7) pour agir au niveau du dos (71) de celle-ci, lequel levier (15) est articulé autour d'un axe (16) situé près de l'extrémité de la came (7) distante de son axe de pivotement (8), a une capacité de pivotement entre deux positions définies par un système de butées (18), et est relié par une biellette (14) à une rondelle-manivelle (12) axée sur l'axe (8) et couplée audit pignon (9) par ledit embrayage à friction (11).Peristaltic pump according to claim 1, characterized in that said control mechanism comprises a lever (15) mounted behind said cam (7) to act on the back (71) thereof, which lever (15) is articulated around an axis (16) located near the end of the cam (7) distant from its pivot axis (8), has a pivoting capacity between two positions defined by a system of stops (18), and is connected by a connecting rod (14) to a crank washer (12) centered on the axis (8) and coupled to said pinion (9) by said friction clutch (11). Pompe péristaltique selon la revendication 2, caractérisée en ce que l'appui entre le levier (15) et le dos (71) de la came (7) se fait par l'intermédiaire d'un élément supplémentaire réglable (17), ce qui permet notamment au même emplacement l'adaptation de tuyaux (5) de différents diamètres.Peristaltic pump according to claim 2, characterized in that the support between the lever (15) and the back (71) of the cam (7) takes place by means of an additional adjustable element (17), which allows in particular at the same location the adaptation of pipes (5) of different diameters. Pompe péristaltique selon la revendication 2 ou 3, caractérisée en ce qu'il est prévu un ressort (19) contribuant à produire la force d'application du levier (15) sur la came (7) lorsque celle-ci est en position de fonctionnement.Peristaltic pump according to claim 2 or 3, characterized in that a spring (19) is provided which contributes to producing the force of application of the lever (15) on the cam (7) when the latter is in the operating position . Pompe péristaltique selon l'une des revendications 1 à 4, caractérisée en ce qu'elle comprend une pluralité de tuyaux (5) montés en parallèle autour du rotor (3), au moins une came (7) et un unique mécanisme de commande (9-15).Peristaltic pump according to one of claims 1 to 4, characterized in that it comprises a plurality of pipes (5) mounted in parallel around the rotor (3), at least one cam (7) and a single control mechanism ( 9-15). Pompe péristaltique selon la revendication 5, caractérisée en ce qu'elle comprend autant de cames (7a-7g) que de tuyaux (5), associées chacune à un tuyau (5).Peristaltic pump according to claim 5, characterized in that it comprises as many cams (7a-7g) as there are pipes (5), each associated with a pipe (5). Pompe péristaltique selon l'une des revendications 1 à 4, caractérisée en ce qu'elle comprend deux groupes de tuyaux (5) montés en parallèle autour du rotor (3), chaque groupe comprenant au moins un tuyau (5), en ce qu'à chaque groupe sont associés au moins une came (7) ainsi qu'un mécanisme de commande (9-15), les deux mécanismes de commande (9-15) fonctionnant en opposition de telle sorte que lorsqu'un groupe de tuyau (5) est contraint, l'autre groupe est relâché.Peristaltic pump according to one of claims 1 to 4, characterized in that it comprises two groups of pipes (5) mounted in parallel around the rotor (3), each group comprising at least one pipe (5), in that 'to each group are associated at least one cam (7) as well as a control mechanism (9-15), the two control mechanisms (9-15) operating in opposition so that when a group of pipes ( 5) is forced, the other group is released. Pompe péristaltique selon la revendication 7, caractérisée en ce qu'elle comporte autant de cames (7h-7m) que de tuyaux (5).Peristaltic pump according to claim 7, characterized in that it comprises as many cams (7h-7m) as there are pipes (5). Pompe péristaltique selon la revendication 7 ou 8, caractérisée en ce que sa commande d'arrêt est programmée de telle façon que pour les périodes d'arrêt, les deux groupes de tuyaux (5) sont relâchés chacun leur tour.Peristaltic pump according to claim 7 or 8, characterized in that its stop command is programmed in such a way that for the stop periods, the two groups of pipes (5) are released in turn. Pompe péristaltique selon l'une des revendications 5 à 9, elles-mêmes dépendantes de la revendication 3, caractérisée en ce que chaque levier (15 ; 15a, 15b) comporte un doigt de réglage propre à chacune des cames qui lui sont associées.Peristaltic pump according to one of claims 5 to 9, themselves dependent on claim 3, characterized in that each lever (15; 15a, 15b) has an adjustment finger specific to each of the cams associated with it.
EP19970460007 1996-01-26 1997-01-23 Peristaltic pump Expired - Lifetime EP0786596B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9601195 1996-01-26
FR9601195A FR2744176B1 (en) 1996-01-26 1996-01-26 PERISTALTIC PUMP

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EP0786596A1 true EP0786596A1 (en) 1997-07-30
EP0786596B1 EP0786596B1 (en) 1998-12-23

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EP19970460007 Expired - Lifetime EP0786596B1 (en) 1996-01-26 1997-01-23 Peristaltic pump

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EP (1) EP0786596B1 (en)
DE (1) DE69700070T2 (en)
DK (1) DK0786596T3 (en)
FR (1) FR2744176B1 (en)

Cited By (7)

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Publication number Priority date Publication date Assignee Title
WO2004044425A1 (en) * 2002-11-13 2004-05-27 Ecolab Inc. Peristaltic pump
EP1705375A1 (en) * 2005-03-10 2006-09-27 LIFEBRIDGE Medizintechnik AG Peristaltic pump
US7300264B2 (en) 2003-09-08 2007-11-27 Hewlett-Packard Development, L.P. Peristaltic pump
WO2009073212A1 (en) 2007-12-05 2009-06-11 Bunn-O-Matic Corporation Peristaltic pump
CN104895779A (en) * 2015-06-09 2015-09-09 常州普瑞流体技术有限公司 Stainless steel peristaltic pump head
US9713660B2 (en) 2012-12-21 2017-07-25 Alcon Research, Ltd. Cassette clamp mechanism
CN110925176A (en) * 2019-12-26 2020-03-27 长沙执先智量科技股份有限公司 Double-roller rotary high-precision peristaltic pump

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202016000790U1 (en) 2016-02-08 2016-03-18 Ralf Hannibal Peristaltic pump with a rotary actuator and a diverter valve

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Publication number Priority date Publication date Assignee Title
US3832096A (en) * 1971-03-03 1974-08-27 Buchler Instr Multitube peristaltic pump with individual programming control
EP0078092A1 (en) * 1981-10-20 1983-05-04 Rudolph Berelson Peristaltic pump
US4604038A (en) * 1985-03-08 1986-08-05 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Remotely operable peristaltic pump
EP0355021A2 (en) * 1988-08-16 1990-02-21 Fresenius AG Pressure infusion device
JPH07217541A (en) * 1994-02-01 1995-08-15 Fumito Komatsu Tube pump

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Publication number Priority date Publication date Assignee Title
US3832096A (en) * 1971-03-03 1974-08-27 Buchler Instr Multitube peristaltic pump with individual programming control
EP0078092A1 (en) * 1981-10-20 1983-05-04 Rudolph Berelson Peristaltic pump
US4604038A (en) * 1985-03-08 1986-08-05 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Remotely operable peristaltic pump
EP0355021A2 (en) * 1988-08-16 1990-02-21 Fresenius AG Pressure infusion device
JPH07217541A (en) * 1994-02-01 1995-08-15 Fumito Komatsu Tube pump

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Title
PATENT ABSTRACTS OF JAPAN vol. 95, no. 008 *

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004044425A1 (en) * 2002-11-13 2004-05-27 Ecolab Inc. Peristaltic pump
US7300264B2 (en) 2003-09-08 2007-11-27 Hewlett-Packard Development, L.P. Peristaltic pump
EP1705375A1 (en) * 2005-03-10 2006-09-27 LIFEBRIDGE Medizintechnik AG Peristaltic pump
US7597546B2 (en) 2005-03-10 2009-10-06 Lifebridge Medizintechnik Ag Hose pump
WO2009073212A1 (en) 2007-12-05 2009-06-11 Bunn-O-Matic Corporation Peristaltic pump
EP2232074A1 (en) * 2007-12-05 2010-09-29 Bunn-O-Matic Corporation Peristaltic pump
EP2232074A4 (en) * 2007-12-05 2017-03-29 Bunn-O-Matic Corporation Peristaltic pump
US9713660B2 (en) 2012-12-21 2017-07-25 Alcon Research, Ltd. Cassette clamp mechanism
CN104895779A (en) * 2015-06-09 2015-09-09 常州普瑞流体技术有限公司 Stainless steel peristaltic pump head
CN110925176A (en) * 2019-12-26 2020-03-27 长沙执先智量科技股份有限公司 Double-roller rotary high-precision peristaltic pump
CN110925176B (en) * 2019-12-26 2024-04-26 湖南执先科技有限公司 Double-roller rotary high-precision peristaltic pump

Also Published As

Publication number Publication date
DE69700070D1 (en) 1999-02-04
DK0786596T3 (en) 1999-08-23
EP0786596B1 (en) 1998-12-23
FR2744176A1 (en) 1997-08-01
DE69700070T2 (en) 1999-05-20
FR2744176B1 (en) 1998-04-10

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