EP0595721B1 - Volumetric peristaltic pump comprising an elastic suction and exhaust element - Google Patents

Volumetric peristaltic pump comprising an elastic suction and exhaust element Download PDF

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Publication number
EP0595721B1
EP0595721B1 EP19930402643 EP93402643A EP0595721B1 EP 0595721 B1 EP0595721 B1 EP 0595721B1 EP 19930402643 EP19930402643 EP 19930402643 EP 93402643 A EP93402643 A EP 93402643A EP 0595721 B1 EP0595721 B1 EP 0595721B1
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EP
European Patent Office
Prior art keywords
faces
flat section
section member
appendices
contact area
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EP19930402643
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German (de)
French (fr)
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EP0595721A1 (en
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René Boisseau
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B43/00—Machines, pumps, or pumping installations having flexible working members
    • F04B43/0009—Special features
    • F04B43/0054—Special features particularities of the flexible members
    • F04B43/0072—Special features particularities of the flexible members of tubular flexible members

Definitions

  • the present invention relates to a positive displacement pump with peristaltic movement comprising an elastic suction and discharge member and a method of manufacturing such a member.
  • Volumetric pumps with peristaltic movement provided with an elastic tube are used to suck and discharge fluids of all kinds. They are used in particular in the food industry where the packaging of food materials requires delicate handling so as not to distort the essential characteristics of the product. In the example of a jam, the pieces of fruit, very fragile, must not be crushed, otherwise the jam loses its taste and commercial appeal.
  • suction and discharge member generally made of elastomeric material
  • This member is exposed to high mechanical stresses at a rapid rate.
  • this member is subjected to a local crushing moving along said member, generated by the passage of rollers traversing a closed path.
  • Obtaining a tube from a flat profile therefore has two advantages: that of forming the tube with a prestress of tension and compression and that of offering the possibility of embedding a reinforcement to increase the resistance to stresses.
  • a male rib 6 and a complementary female groove 7 are arranged on the contact surface of the appendages 2, 3 which are held in position by the sole action of the two half-stators 4, 5.
  • the suction and discharge member supported by the support device is flattened, thereby generating a suction region and discharge region separated by a nip region.
  • the present invention relates, which relates to a volumetric pump with peristaltic movement comprising an elastic suction and discharge member allowing easy and optimal cleaning. It also relates to a method of manufacturing such an organ.
  • the present invention relates to a volumetric pump with peristaltic movement comprising an elastic suction and discharge member, intended for sucking and discharging fluid materials by displacement along said member of a local crushing generated by the passage of rollers, said member comprising a tubular part having two contiguous edges directed towards the inside of said tubular part and two fixing appendages having two faces adjacent to said contiguous edges, said faces being substantially radial, characterized in that the two faces are fixed against one another by the entire contact surface of the two faces.
  • the two faces are fixed against each other by adhesion of the two faces over their entire contact surface.
  • the two faces are fixed against one another by vulcanization of the two faces over their entire contact surface.
  • This essential characteristic of the present invention has advantages at various levels.
  • the adhesion or vulcanization of the two faces against each other does not allow the formation of a gap in the area adjacent to the contiguous edges, hence the impossibility of infiltration of fluent materials. in said gap.
  • the cleaning of the elastic suction and delivery member is thereby facilitated and improved, thereby avoiding any risk of damage or contamination of the pumped food materials.
  • the member is adhered or vulcanized, it is delivered to industry in its final state of use and not in the form of a flat profile known from the prior art. This has the consequence of facilitating the change of the organ either in the event of wear thereof, or in the event of the establishment of a specific organ for a given food material. It is also advantageous to be able to deliver preformed members when the members have particularly large dimensions with a large thickness of elastomer, since the installation of such members delivered in the form of flat profiles requires the application of a force. important and a certain know-how to bend the profile on itself. According to the present invention, this work is already carried out, which eliminates all difficulties in setting up such bodies.
  • FIG. 2 represents an elastic suction and delivery member in accordance with the invention in the rest state, that is to say one which is not subjected to any stress impressed by a roller.
  • This member which we will denote by 1 in the present description comprises a tubular part 2 having two contiguous edges 21, 22 directed towards the inside of said tubular part 2 and two fixing appendages 31, 32 having two faces 33, 34 adjacent to said contiguous edges 21, 22, said faces 33, 34 being substantially radial and having a radial contact surface.
  • the tubular part 2 is reinforced by a frame 9 which is embedded in the mass of said tubular part 2.
  • This frame is in the form of a nylon, cotton or metal fabric which extends coaxially from centered in said tubular part 2.
  • one of the two faces 33, 34 carries longitudinally a male rib 35 advantageously of semi-cylindrical shape and the other face has a complementary female groove 36.
  • the insertion of the rib 35 in the groove 36 ensures good centering of the tube and allows an excess of adhering agent applied in the groove 36 to creep towards the outside thereof when the two faces are brought into contact. 33, 34.
  • the member 1 is held in position by adhesion of the two faces 33, 34 over their entire contact surface.
  • Industrial bonding agents having a particularly high adhesion capacity and resistance to mechanical stresses, such as agents based on cyano acrylates, for example from the company Loctite®, can be used for the claimed purposes of the present invention.
  • the two faces 33, 34 are fixed to each other by adhesion.
  • vulcanization is also a suitable technique in the case of the present invention. This embodiment by adhesion cannot therefore be limiting.
  • FIG. 3 aims to illustrate a method of manufacturing the member of FIG. 2.
  • the elastic suction and discharge member 1 is obtained from a flat profile 2 made of elastomer having a first 2a and a second 2b sides, and having along two parallel edges two attachment appendages 31, 32 substantially perpendicular to the surface of said flat profile 2 and extending only from the first side 2a of said flat profile 2, each of the two appendages 31 , 32 having a substantially flat face 33, 34 directed towards the outside of said flat section 2.
  • Said faces 33, 34 respectively have a female groove 36 and a complementary male rib 35 advantageously of semi-cylindrical shape arranged longitudinally.
  • the frame 9 is embedded in the flat part of the profile 2 without extending as far as the appendages 31, 32. The incorporation of this frame was carried out in a conventional manner by interposition between two plates of raw rubber, followed by a cooking.
  • the first step of the process consists in cleaning the two faces 33, 34 using a solvent (such as acetone) and / or a solvent (such as trichlorethylene), this in order to maximize the power of effective adhesion of the adhering agent.
  • a solvent such as acetone
  • a solvent such as trichlorethylene
  • One of the two faces 33, 34 (or both depending on the type of bonding agent) is then coated with a bonding agent.
  • the next step is to bring the two faces 33, 34 into contact with one another in the direction of the arrows f, f 'of Figure 3, by bending the flat profile 2 on itself with the first side 2a of the flat profile 2 directed outwards.
  • the shape obtained is shown in FIG. 3.
  • the final step consists in applying a couple of opposing forces f1, f2 perpendicular to the contact surface of the two fixing appendages 31, 32 for a predetermined time which depends on the type of agent. membership.
  • the member 1 in FIG. 3 has a bracket 37, 38 at each end of the two fixing appendages 31, 32. This difference in construction depends on the geometric configuration of the jaws of the two half-stators making it possible to maintain the member 1 in the passage of the rollers.

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

Description

La présente invention a pour objet une pompe volumétrique à mouvement péristaltique comportant un organe d'aspiration et de refoulement élastique et un procédé de fabrication d'un tel organe.The present invention relates to a positive displacement pump with peristaltic movement comprising an elastic suction and discharge member and a method of manufacturing such a member.

Les pompes volumétriques à mouvement péristaltique pourvues d'un tube élastique sont utilisées pour aspirer et refouler des matières fluides de toutes natures. Elles sont notamment utilisées dans l'industrie agro-alimentaire où le conditionnement des matières alimentaires nécessite une manipulation délicate afin de ne pas dénaturer les caractéristiques essentielles du produit. Dans l'exemple d'une confiture, les morceaux de fruits, très fragiles, ne doivent pas être écrasés , sans quoi la confiture perd son attrait gustatif et commercial.Volumetric pumps with peristaltic movement provided with an elastic tube are used to suck and discharge fluids of all kinds. They are used in particular in the food industry where the packaging of food materials requires delicate handling so as not to distort the essential characteristics of the product. In the example of a jam, the pieces of fruit, very fragile, must not be crushed, otherwise the jam loses its taste and commercial appeal.

Leur organe d'aspiration et de refoulement, généralement en matière élastomère, est exposé à de hautes contraintes mécaniques à une cadence rapide. En l'occurence, cet organe est soumis à un écrasement local se déplaçant le long dudit organe, généré par le passage de galets parcourant un chemin fermé.Their suction and discharge member, generally made of elastomeric material, is exposed to high mechanical stresses at a rapid rate. In this case, this member is subjected to a local crushing moving along said member, generated by the passage of rollers traversing a closed path.

Il est bien connu dans l'art antérieur de doter ces pompes volumétriques à mouvement péristaltique d'un organe d'aspiration et de refoulement élastique obtenu à partir d'un profilé plat en élastomère. De tels organes d'aspiration sont notamment décrits dans le brevet français n°. 7 512 696 et son certificat d'addition. Sur la figure 1, tirée du brevet susmentionné, et donnée à titre illustratif de l'art antérieur, le profilé 1 est maintenu cintré sur lui-même par la prise en étau de deux appendices de fixation 2, 3 par deux demi-stators 4, 5 constituant également un dispositif d'appui pour le profilé 1 cintré. L'avantage d'un organe d'aspiration et de refoulement obtenu à partir d'un profilé plat est l'état de précontrainte de tension et de compression interne du tube cintré. En effet, la zone périphérique interne du tube est fortement comprimée et la zone péripérique externe du tube est en état de tension, ce qui contribue doublement au retour à la section initiale au repos du tube élastique après le passage d'un galet. Il est également connu de noyer une armature en toile textile ou métallique dans l'épaisseur du tube pour renforcer l'élasticité de ce dernier et lui permettre de mieux résister aux effets de la pression qu'une pompe péristaltique peut être amenée à vaincre. L'insertion de cette armature n'a d'ailleurs été rendue possible que par l'obtention du tube à partir d'un profilé plat, car le moulage d'un tube avec une armature incorporée n'est techniquement pas réalisable. En effet, cela conduirait à un fluage de l'armature vers les joints du moule, d'où un mauvais centrage de cette dernière et la formation de zones de moindre résistance aux contraintes. Dans un profilé plat, l'armature est simplement disposée à plat entre deux plaques de caoutchouc cru qui sont ensuite cuites ou vulcanisées. Le problème du centrage de l'armature ne se pose ainsi plus.It is well known in the prior art to provide these positive displacement pumps with peristaltic movement with an elastic suction and delivery member obtained from a flat elastomer profile. Such suction members are described in particular in French patent no. 7,512,696 and its certificate of addition. In Figure 1, taken from the aforementioned patent, and given by way of illustration of the prior art, the profile 1 is kept curved on itself by the clamping of two fixing appendages 2, 3 by two half-stators 4 , 5 also constituting a support device for the curved profile 1. The advantage of a suction and discharge member obtained from a flat profile is the state of prestressing of tension and internal compression of the bent tube. Indeed, the internal peripheral zone of the tube is strongly compressed and the external periphery zone of the tube is in a state of tension, which contributes doubly to the return to the initial section at rest of the elastic tube after the passage of a roller. It is also known to drown a reinforcement in textile or metallic canvas in the thickness of the tube to reinforce the elasticity of the latter and allow it to better resist the effects of pressure that a peristaltic pump can be brought to overcome. The insertion of this frame was also made possible only by obtaining the tube from a flat profile, because the molding of a tube with an incorporated frame is technically not feasible. Indeed, this would lead to a creep of the reinforcement towards the mold joints, hence poor centering of the latter and the formation of zones of lower resistance to stresses. In a flat profile, the frame is simply placed flat between two sheets of raw rubber which are then baked or vulcanized. The problem of centering the reinforcement no longer arises.

L'obtention d'un tube à partir d'un profilé plat présente donc deux avantages : celui de former le tube avec une précontrainte de tension et de compression et celui d'offrir la possibilité de noyer une armature pour augmenter la résistance aux contraintes.Obtaining a tube from a flat profile therefore has two advantages: that of forming the tube with a prestress of tension and compression and that of offering the possibility of embedding a reinforcement to increase the resistance to stresses.

Afin d'assurer un bon centrage du tube et de réaliser un raccord d'étanchéité entre les deux appendices de fixation 2, 3, une nervure 6 mâle et une gorge 7 femelle complémentaire sont disposées sur la surface de contact des appendices 2, 3 qui sont maintenus en position par la seule action des deux demi-stators 4, 5. Lors du passage d'un galet, l'organe d'aspiration et de refoulement soutenu par le dispositif d'appui, est aplati, générant de ce fait une région d'aspiration et une région de refoulement séparées par une région de pincement.In order to ensure correct centering of the tube and to produce a sealing connection between the two fixing appendages 2, 3, a male rib 6 and a complementary female groove 7 are arranged on the contact surface of the appendages 2, 3 which are held in position by the sole action of the two half-stators 4, 5. When passing a roller, the suction and discharge member supported by the support device is flattened, thereby generating a suction region and discharge region separated by a nip region.

Cependant, il s'avère que, malgré le serrage des deux demi-stators contre les appendices de fixation 2, 3, pour assurer l'étanchéité, la zone de contact 8 des deux appendices adjacents à l'intérieur du tube élastique a tendance à s'entrouvrir sous l'action de l'écrasement local du tube. De plus, cette indésirable tendance est acentuée par le fait que, les deux demi-stators n'appliquant pas de contrainte à l'endroit de cette zone 8, l'écrasement qu'ils génèrent sur le reste de la surface de contact des deux appendices de fixation, favorise l'écartement des deux appendices à l'endroit de la zone 8. Cet écartement temporaire, vu qu'il ne se produit que lors du passage d'un écrasement local du tube, permet aux produits circulant à l'intérieur du tube de s'infiltrer dans l'interstice de la zone 8.However, it turns out that, despite the tightening of the two half-stators against the fixing appendages 2, 3, to ensure sealing, the contact zone 8 of the two adjacent appendages inside the elastic tube tends to half-open under the action of the local crushing of the tube. In addition, this undesirable tendency is accentuated by the fact that, the two half-stators applying no stress at the location of this zone 8, the crushing that they generate on the rest of the contact surface of the two fixing appendages, promotes the separation of the two appendages at the location of zone 8. This temporary separation, since it only occurs during the passage of a local crushing of the tube, allows the products circulating in the inside the tube to infiltrate into the gap in zone 8.

Après le passage de l'écrasement local du tube, les deux appendices rentrent à nouveau en contact sur la totalité de leur surface, l'interstice disparaissant. Les produits ayant pénétré dans l'interstice lors du passage d'écrasement local du tube, se trouve ainsi pris au piège quand le tube est au repos. Il est alors difficile voire impossible de procéder à un nettoyage optimal de l'organe d'aspiration et de refoulement, vu que les produits prisonniers de la zone 8 échappent au lavage. Cet inconvénient n'a pas trop d'incidence lorsque le produit pompé est de nature purement chimique entre autres, mais peut, dans le cas de matières alimentaires, endommager ou contaminer ces dernières, du fait de la putréfaction des matières alimentaires prises au piège dans la zone 8 et ayant ainsi échappé au lavage de l'organe d'aspiration et de refoulement élastique.After the passage of the local crushing of the tube, the two appendages come into contact again over their entire surface, the gap disappearing. The products having penetrated into the gap during the local crushing passage of the tube, is thus trapped when the tube is at rest. It is then difficult or even impossible to carry out an optimal cleaning of the suction and delivery member, since the products trapped in zone 8 escape washing. This drawback does not have too much impact when the pumped product is of a purely chemical nature, among others, but can, in the case of food materials, damage or contaminate them, due to the putrefaction of food materials trapped in zone 8 and thus having escaped washing of the suction and elastic discharge member.

C'est à remédier à cet inconvénient que s'attache la présente invention qui a pour objet une pompe volumétrique à mouvement péristaltique comportant un organe d'aspiration et de refoulement élastique permettant un nettoyage aisé et optimal. Elle a également pour objet un procédé de fabrication d'un tel organe.It is to remedy this drawback that the present invention relates, which relates to a volumetric pump with peristaltic movement comprising an elastic suction and discharge member allowing easy and optimal cleaning. It also relates to a method of manufacturing such an organ.

La présente invention a pour objet une pompe volumétrique à mouvement péristaltique comportant un organe d'aspiration et de refoulement élastique, destiné à aspirer et à refouler des matières fluides par déplacement le long dudit organe d'un écrasement local généré par le passage de galets, ledit organe comprenant une partie tubulaire présentant deux arêtes jointives dirigées vers l'intérieur de ladite partie tubulaire et deux appendices de fixation présentant deux faces adjacentes auxdites arêtes jointives, lesdites faces étant sensiblement radiales, caractérisée en ce que les deux faces sont fixées l'une contre l'autre par la totalité de la surface de contact des deux faces .The present invention relates to a volumetric pump with peristaltic movement comprising an elastic suction and discharge member, intended for sucking and discharging fluid materials by displacement along said member of a local crushing generated by the passage of rollers, said member comprising a tubular part having two contiguous edges directed towards the inside of said tubular part and two fixing appendages having two faces adjacent to said contiguous edges, said faces being substantially radial, characterized in that the two faces are fixed against one another by the entire contact surface of the two faces.

Plus avantageusement, les deux faces sont fixées l'une contre l'autre par adhérisation des deux faces sur la totalité de leur surface de contact.More advantageously, the two faces are fixed against each other by adhesion of the two faces over their entire contact surface.

En variante, les deux faces sont fixées l'une contre l'autre par vulcanisation des deux faces sur la totalité de leur surface de contact.As a variant, the two faces are fixed against one another by vulcanization of the two faces over their entire contact surface.

Cette caractéristique essentielle de la présente invention présente des avantages à différents niveaux.This essential characteristic of the present invention has advantages at various levels.

Tout d'abord, l'adhérisation ou la vulcanisation des deux faces l'une contre l'autre ne permet pas la formation d'un interstice dans la zone adjacente aux arêtes jointives, d'où l'impossibilité d'infiltration de matières fluides dans ledit interstice. Le nettoyage de l'organe d'aspiration et de refoulement élastique s'en trouve facilité et amélioré, évitant de ce fait tout risque d'endommagement ou de contamination des matières alimentaires pompées.First of all, the adhesion or vulcanization of the two faces against each other does not allow the formation of a gap in the area adjacent to the contiguous edges, hence the impossibility of infiltration of fluent materials. in said gap. The cleaning of the elastic suction and delivery member is thereby facilitated and improved, thereby avoiding any risk of damage or contamination of the pumped food materials.

De plus, du fait que l'organe est adhérisé ou vulcanisé, il est livré dans l'industrie dans son état final d'utilisation et non dans la forme d'un profilé plat connu de l'art antérieur. Ceci a pour conséquence de faciliter le changement de l'organe soit en cas d'usure de celui-ci, soit en cas de mis en place d'un organe spécifique pour une matière alimentaire donnée. Il est également avantageux de pouvoir livrer des organes préformés lorsque les organes présentent des dimensions particulièrement grandes avec une épaisseur d'élast omère importante, car la mise en place de tels organes livrés sous la forme de profilés plats requiert l'application d'une force importante et d'un savoir-faire certain pour cintrer le profilé sur lui-même. Selon la présente invention, ce travail est déjà réalisé, ce qui élimine toutes difficultés de mise en place de tels organes.In addition, because the member is adhered or vulcanized, it is delivered to industry in its final state of use and not in the form of a flat profile known from the prior art. This has the consequence of facilitating the change of the organ either in the event of wear thereof, or in the event of the establishment of a specific organ for a given food material. It is also advantageous to be able to deliver preformed members when the members have particularly large dimensions with a large thickness of elastomer, since the installation of such members delivered in the form of flat profiles requires the application of a force. important and a certain know-how to bend the profile on itself. According to the present invention, this work is already carried out, which eliminates all difficulties in setting up such bodies.

La présente invention a également pour objet un procédé de fabrication d'un organe d'aspiration et de refoulement élastique de pompe volumétrique à mouvement péristaltique, destiné à aspirer et à refouler des matières fluides par déplacement le long dudit organe d'un écrasement local généré par le passage de galets, ledit organe étant constitué d'un profilé plat en élastomère ayant un premier et un deuxième côtés, et présentant le long de deux bords parallèles deux appendices de fixation sensiblement perpendiculaires à la surface dudit profil plat et ne s'étendant que du premier côté dudit profilé plat, chacun des deux appendices présentant une face sensiblement plane dirigée vers l'extérieur dudit profilé plat, caractérisé en ce que le procédé comprend les étapes suivantes :

  • nettoyer les faces au moyen d'un solvant ou/et d'un dissolvant ;
  • enduire la totalité des deux faces au moyen d'un agent d'adhérisation adapté ;
  • amener les deux faces en contact l'une contre l'autre en cintrant le profilé plat sur lui-même avec le premier côté dudit profilé plat dirigé vers l'extérieur ;
  • appliquer un couple de forces antagonistes perpendiculaire à la surface de contact des deux appendices de fixation pendant un temps déterminé.
The present invention also relates to a method of manufacturing an elastic suction and discharge member of a positive displacement pump with peristaltic movement, intended to suck and discharge fluid materials by displacement along said member of a local crushing generated by the passage of rollers, said member consisting of a flat elastomer profile having first and second sides, and having along two parallel edges two attachment appendages substantially perpendicular to the surface of said flat profile and not extending that on the first side of said flat profile, each of the two appendages having a substantially planar face directed towards the outside of said flat profile, characterized in that the method comprises the following stages:
  • clean the faces using a solvent and / or a solvent;
  • coat all of the two faces with a suitable bonding agent;
  • bringing the two faces into contact with one another by bending the flat section on itself with the first side of said flat section facing outwards;
  • apply a couple of opposing forces perpendicular to the contact surface of the two fixing appendages for a determined time.

En variante, l'invention prévoit également un procédé de fabrication d'un organe d'aspiration et de refoulement élastique de pompe volumétrique à mouvement péristaltique, destiné à aspirer et à refouler des matières fluides par déplacement le long dudit organe d'un écrasement local généré par le passage de galets, ledit organe étant constitué d'un profilé plat en élastomère ayant un premier et un deuxième côtés, et présentant le long de deux bords parallèles deux appendices de fixation sensiblement perpendiculaires à la surface dudit profil plat et ne s'étendant que du premier côté dudit profilé plat, chacun des deux appendices présentant une face sensiblement plane dirigée vers l'extérieur dudit profilé plat, caractérisé en ce que le procédé comprend les étapes suivantes :

  • nettoyer les faces au moyen d'un solvant ou/et d'un dissolvant ;
  • amener les deux faces en contact l'une contre l'autre en cintrant le profilé plat sur lui-même avec le premier côté dudit profilé plat dirigé vers l'extérieur ;
  • vulcaniser les deux faces par la totalité de leur surface de contact.
As a variant, the invention also provides a method of manufacturing an elastic suction and delivery member of a volumetric pump with a peristaltic movement, intended to suck and discharge fluid materials by displacement along said member of a local crushing generated by the passage of rollers, said member consisting of a flat elastomer profile having first and second sides, and having along two parallel edges two attachment appendages substantially perpendicular to the surface of said flat profile and does not extending that on the first side of said flat profile, each of the two appendages having a substantially planar face directed towards the outside of said flat profile, characterized in that the method comprises the following steps:
  • clean the faces using a solvent and / or a solvent;
  • bringing the two faces into contact with one another by bending the flat section on itself with the first side of said flat section facing outwards;
  • vulcanize both sides by their entire contact surface.

La présente invention sera maintenant décrite plus amplement, au regard des dessins annexés et donnant à titre indicatif, mais non limitatif un mode de réalisation de l'invention.The present invention will now be described more fully, with reference to the accompanying drawings and giving by way of indication, but not limitation, an embodiment of the invention.

Sur les dessins :

  • la figure 1 est une vue en coupe d'un organe d'aspiration et de refoulement élastique de pompe volumétrique à mouvement péristaltique de l'art antérieur, maintenu par deux demi-stators formant dispositif d'appui à l'état écrasé par un galet circulant le long dudit organe ;
  • la figure 2 est une vue en coupe d'un organe d'aspiration et de refoulement élastique incorporant la présente invention ;
  • la figure 3 est une représentation en coupe visant à illustrer les étapes que comprend le procédé de fabrication revendiqué, de l'état initial à l'état final de l'organe incorporant la présente invention.
In the drawings:
  • Figure 1 is a sectional view of a suction member and elastic discharge of positive displacement pump with peristaltic movement of the prior art, held by two half-stators forming a support device in the state crushed by a roller flowing along said organ;
  • Figure 2 is a sectional view of an elastic suction and discharge member incorporating the present invention;
  • Figure 3 is a sectional view to illustrate the steps involved in the claimed manufacturing process, from the initial to the final state of the member incorporating the present invention.

La figure 2 représente un organe d'aspiration et de refoulement élastique conforme à l'invention à l'état de repos, c'est-à-dire ne subissant pas de contrainte imprimée par un galet. Cet organe que nous allons désigner par 1 dans la présente description comprend une partie tubulaire 2 présentant deux arêtes jointives 21, 22 dirigées vers l'intérieur de ladite partie tubulaire 2 et deux appendices de fixation 31, 32 présentant deux faces 33, 34 adjacentes auxdites arêtes jointives 21, 22, lesdites faces 33, 34 étant sensiblement radiales et présentant une surface de contact radiale. De préférence, la partie tubulaire 2 est renforcée par une armature 9 qui est noyée dans la masse de ladite partie tubulaire 2. Cette armature se présente sous la forme d'une toile de nylon, de coton ou de métal qui s'étend coaxialement de façon centrée dans ladite partie tubulaire 2. On voit que l'une des deux faces 33, 34 porte longitudinalement une nervure mâle 35 avantageusement de forme demi-cylindrique et l'autre face présente une gorge femelle 36 complémentaire. L'insertion de la nervure 35 dans la gorge 36 assure un bon centrage du tube et permet à un excès d'agent adhérisant appliqué dans la gorge 36 de fluer vers l'extérieur de celle-ci lors de la mise en contact des deux faces 33, 34. L'organe 1 est maintenu en position par adhérisation des deux faces 33, 34 sur la totalité de leur surface de contact. Les agents d'adhérisation industriels ayant une capacité d'adhérence et une résistance aux contraintes mécaniques particulièrement importantes, tels que les agents à base de cyano acrylates, par exemple de la société Loctite®, sont utilisables aux fins revendiquées de la présente invention.FIG. 2 represents an elastic suction and delivery member in accordance with the invention in the rest state, that is to say one which is not subjected to any stress impressed by a roller. This member which we will denote by 1 in the present description comprises a tubular part 2 having two contiguous edges 21, 22 directed towards the inside of said tubular part 2 and two fixing appendages 31, 32 having two faces 33, 34 adjacent to said contiguous edges 21, 22, said faces 33, 34 being substantially radial and having a radial contact surface. Preferably, the tubular part 2 is reinforced by a frame 9 which is embedded in the mass of said tubular part 2. This frame is in the form of a nylon, cotton or metal fabric which extends coaxially from centered in said tubular part 2. It can be seen that one of the two faces 33, 34 carries longitudinally a male rib 35 advantageously of semi-cylindrical shape and the other face has a complementary female groove 36. The insertion of the rib 35 in the groove 36 ensures good centering of the tube and allows an excess of adhering agent applied in the groove 36 to creep towards the outside thereof when the two faces are brought into contact. 33, 34. The member 1 is held in position by adhesion of the two faces 33, 34 over their entire contact surface. Industrial bonding agents having a particularly high adhesion capacity and resistance to mechanical stresses, such as agents based on cyano acrylates, for example from the company Loctite®, can be used for the claimed purposes of the present invention.

Dans ce mode de réalisation, les deux faces 33, 34 sont fixées l'une à l'autre par adhérisation. Cependant, la vulcanisation est une technique également adéquate dans le cas de la présente invention. Ce mode de réalisation par adhérisation ne saurait donc avoir un caractère limitatif.In this embodiment, the two faces 33, 34 are fixed to each other by adhesion. However, vulcanization is also a suitable technique in the case of the present invention. This embodiment by adhesion cannot therefore be limiting.

La figure 3 vise à illustrer un mode de fabrication de l'organe de la figure 2. Selon ce procédé, l'organe d'aspiration et de refoulement élastique 1 est obtenu à partir d'un profilé plat 2 en élastomère ayant un premier 2a et un deuxième 2b côtés, et présentant le long de deux bords parallèles deux appendices de fixation 31, 32 sensiblement perpendiculaires à la surface dudit profilé plat 2 et ne s'étendant que du premier côté 2a dudit profilé plat 2, chacun des deux appendices 31, 32 présentant une face 33, 34 sensiblement plane dirigée vers l'extérieur dudit profilé plat 2. Lesdites faces 33, 34 présentent respectivement une gorge femelle 36 et une nervure mâle 35 complémentaire avantageusement de forme demi-cylindrique disposées longitudinalement. L'armature 9 est noyée dans la partie plane du profilé 2 sans s'étendre jusque dans les appendices 31, 32. L'incorporation de cette armature a été réalisée de façon classique par interposition entre deux plaques de caoutchouc cru, suivie d'une cuisson.FIG. 3 aims to illustrate a method of manufacturing the member of FIG. 2. According to this method, the elastic suction and discharge member 1 is obtained from a flat profile 2 made of elastomer having a first 2a and a second 2b sides, and having along two parallel edges two attachment appendages 31, 32 substantially perpendicular to the surface of said flat profile 2 and extending only from the first side 2a of said flat profile 2, each of the two appendages 31 , 32 having a substantially flat face 33, 34 directed towards the outside of said flat section 2. Said faces 33, 34 respectively have a female groove 36 and a complementary male rib 35 advantageously of semi-cylindrical shape arranged longitudinally. The frame 9 is embedded in the flat part of the profile 2 without extending as far as the appendages 31, 32. The incorporation of this frame was carried out in a conventional manner by interposition between two plates of raw rubber, followed by a cooking.

La première étape du procédé consiste à nettoyer les deux faces 33, 34 à l'aide d'un solvant (tel que l'acétone) et/ou d'un dissolvant (tel que du trichloréthylène), ceci afin de maximiser le pouvoir d'adhérence effectif de l'agent d'adhérisation. Une des deux faces 33, 34 (ou les deux suivant le type d'agent d'adhérisation) est ensuite enduite d'un agent d'adhérisation. L'étape suivante consiste à amener les deux faces 33, 34 en contact l'une contre l'autre dans le sens des flèches f, f' de la figure 3, en cintrant le profilé plat 2 sur lui-même avec le premier côté 2a du profilé plat 2 dirigé vers l'extérieur. La forme obtenue est représentée sur la figure 3. L'étape finale consiste à appliquer un couple de forces antagonistes f1, f2 perpendiculaires à la surface de contact des deux appendices de fixation 31, 32 pendant un temps prédéterminé qui dépend du type d'agent d'adhérisation.The first step of the process consists in cleaning the two faces 33, 34 using a solvent (such as acetone) and / or a solvent (such as trichlorethylene), this in order to maximize the power of effective adhesion of the adhering agent. One of the two faces 33, 34 (or both depending on the type of bonding agent) is then coated with a bonding agent. The next step is to bring the two faces 33, 34 into contact with one another in the direction of the arrows f, f 'of Figure 3, by bending the flat profile 2 on itself with the first side 2a of the flat profile 2 directed outwards. The shape obtained is shown in FIG. 3. The final step consists in applying a couple of opposing forces f1, f2 perpendicular to the contact surface of the two fixing appendages 31, 32 for a predetermined time which depends on the type of agent. membership.

Par un procédé similaire à celui-ci reprenant la première et la deuxième étapes, il est possible de vulcaniser les deux faces 33, 34 par la totalité de leur surface de contact.By a process similar to this repeating the first and second steps, it is possible to vulcanize the two faces 33, 34 by the whole of their contact surface.

Il peut être observé que l'organe 1 de la figure 3 présente une potence 37, 38 à chaque extrémité des deux appendices de fixation 31, 32. Cette différence de réalisation dépend de la configuration géométrique des machoires des deux demi-stators permettant de maintenir l'organe 1 dans le passage des galets.It can be observed that the member 1 in FIG. 3 has a bracket 37, 38 at each end of the two fixing appendages 31, 32. This difference in construction depends on the geometric configuration of the jaws of the two half-stators making it possible to maintain the member 1 in the passage of the rollers.

Claims (6)

  1. A positive displacement peristaltic motion pump comprising a resilient suction and delivery member for sucking in and delivering fluid material by moving local compression along said member as generated by the passage of wheels, said member comprising a tubular portion (2) having two touching edges (21, 22) directed towards the inside of the tubular portion (2) and two fixing appendices (31, 32) presenting two faces (33, 34) adjacent to said touching edges (21, 22), said faces being substantially radial, the pump being characterized in that the two faces (33, 34) are fixed against each other over the entire contact area of the two faces (33, 34).
  2. A pump according to claim 1, in which the two faces (33, 34) are fixed against each other by bonding the two faces (33, 34) together over the entire contact area thereof.
  3. A pump according to claim 1, in which the two faces (33, 34) are fixed against each other by vulcanizing the two faces (33, 34) over their entire contact area.
  4. A pump according to any preceding claim, in which the tubular portion (2) is reinforced by reinforcement webbing (9) embedded in said tubular portion (2).
  5. A method of manufacturing a resilient suction and delivery member for a positive displacement pump having peristaltic motion, the member being designed to suck and deliver fluid materials by displacement of local compression along said member as generated by the passage of wheels, said member being constituted by a flat section member (2) of elastomer having first and second sides (2a, 2b), and presenting along two parallel edges two fixing appendices (31, 32) that are substantially perpendicular to the surface of said flat section member (2) and that extend from the first side only (2a) of said flat section member (2), each of the two appendices (31, 32) having a substantially plane face (33, 34) directed away from said flat section member (2), the method being characterized in that it comprises the following steps:
    · the faces (33, 34) are cleaned by means of a solvent;
    · one of the two faces (33, 34) is coated with an appropriate bonding agent suitable for achieving bonding over the entire contact area of the two faces;
    · the two faces (33, 34) are brought into contact with each other by wrapping the flat section member (2) onto itself with the first side (2a) of said flat section member (2) being directed towards the outside; and
    · applying a pair of opposing forces (f1, f2) perpendicularly to the contact area of the two fixing appendices (31, 32) for a determined length of time.
  6. A method of manufacturing a resilient suction and delivery member for a positive displacement pump having peristaltic motion, the member being designed to suck and deliver fluid materials by displacement of local compression along said member as generated by the passage of wheels, said member being constituted by a flat section member (2) of elastomer having first and second sides (2a, 2b), and presenting along two parallel edges two fixing appendices (31, 32) that are substantially perpendicular to the surface of said flat section member (2) and that extend from the first side only (2a) of said flat section member (2), each of the two appendices (31, 32) having a substantially plane face (33, 34) directed away from said flat section member (2), the method being characterized in that it comprises the following steps:
    · the faces (33, 34) are cleaned by means of a solvent;
    · the two faces (33, 34) are brought into contact with each other by wrapping the flat section member (2) onto itself with the first side (2a) of said flat section member (2) being directed towards the outside; and
    · vulcanizing the two faces (33, 34) over their entire contact area.
EP19930402643 1992-10-29 1993-10-28 Volumetric peristaltic pump comprising an elastic suction and exhaust element Expired - Lifetime EP0595721B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9212943 1992-10-29
FR9212943A FR2697590B1 (en) 1992-10-29 1992-10-29 Volumetric pump with peristaltic movement comprising an elastic suction and discharge member and method for manufacturing such a member.

Publications (2)

Publication Number Publication Date
EP0595721A1 EP0595721A1 (en) 1994-05-04
EP0595721B1 true EP0595721B1 (en) 1997-04-02

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP19930402643 Expired - Lifetime EP0595721B1 (en) 1992-10-29 1993-10-28 Volumetric peristaltic pump comprising an elastic suction and exhaust element

Country Status (3)

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EP (1) EP0595721B1 (en)
DE (1) DE69309391T2 (en)
FR (1) FR2697590B1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3032751B1 (en) * 2015-02-12 2018-08-10 Bertrand Boisseau Du Rocher PERISTALTIC PUMP.
FR3060447B1 (en) * 2016-12-21 2019-08-09 Bioret Agri-Logette Confort TUBULAR FLEXIBLE DEVICE COMPRISING AN ELASTOMERIC MATRIX TUBULAR WALL, AN ELEVATION SPACE COMPRISING SUCH A DEVICE AND A METHOD OF MANUFACTURING THE SAME

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2098593A5 (en) * 1970-07-21 1972-03-10 Seyler Leon Antoine
AT337005B (en) * 1974-04-24 1977-06-10 Sermem Sa DOSING HOSE PUMP
CH609427A5 (en) * 1977-06-17 1979-02-28 Sermem Sa Volumetric pump with an elastic lifting and forcing member

Also Published As

Publication number Publication date
DE69309391D1 (en) 1997-05-07
EP0595721A1 (en) 1994-05-04
FR2697590B1 (en) 1994-12-23
FR2697590A1 (en) 1994-05-06
DE69309391T2 (en) 1997-11-06

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