EP0180632B1 - Peristaltic pump - Google Patents

Peristaltic pump Download PDF

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Publication number
EP0180632B1
EP0180632B1 EP85902506A EP85902506A EP0180632B1 EP 0180632 B1 EP0180632 B1 EP 0180632B1 EP 85902506 A EP85902506 A EP 85902506A EP 85902506 A EP85902506 A EP 85902506A EP 0180632 B1 EP0180632 B1 EP 0180632B1
Authority
EP
European Patent Office
Prior art keywords
ring
rollers
hose
pump
squeeze
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP85902506A
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German (de)
French (fr)
Other versions
EP0180632A1 (en
Inventor
Hans Beerwald
Günter Böhm
Werner Lück
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Glomski Guenter
Original Assignee
Glomski Guenter
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Filing date
Publication date
Application filed by Glomski Guenter filed Critical Glomski Guenter
Priority to AT85902506T priority Critical patent/ATE38266T1/en
Publication of EP0180632A1 publication Critical patent/EP0180632A1/en
Application granted granted Critical
Publication of EP0180632B1 publication Critical patent/EP0180632B1/en
Expired legal-status Critical Current

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Classifications

    • 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
    • F04B43/12—Machines, pumps, or pumping installations having flexible working members having peristaltic action
    • F04B43/1253—Machines, 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

Definitions

  • the invention relates to a peristaltic pump with pinch rollers rotating on a circular path and a ring which tightly surrounds the roller circle and presses a hose arranged on its inner circumference against the pinch rollers.
  • Peristaltic pumps of this type often also referred to as “roller pumps” or “peristaltic pumps” - are used as laboratory devices and are also used in a variety of ways in medical technology. In medical technology, they are used very frequently for routine tasks that require the hose to be inserted quickly and safely. The hose is usually a disposable part that is used only once.
  • a peristaltic pump of the type mentioned at the outset is known, for example, from FR-A-1 067 081.
  • the pinch rollers are inelastically mounted on the rotor.
  • the ring which closely surrounds the roller circle is largely inelastic, so that an extraordinarily great fit is required during assembly in order to achieve uniform squeezing forces along the roller circle. Accordingly, in this known hose pump, changing the hose is extremely time-consuming.
  • a peristaltic pump in which handling, in particular the insertion of the hose, is significantly facilitated, is described in DE-B-23 58 228. These and other peristaltic pumps for easier handling, however, require an increased design effort for the already not very simple mechanical construction of the peristaltic pumps.
  • the function of the peristaltic pump is irrelevant whether the rollers press resiliently against the fixed squeeze track or the squeeze track resiliently presses against the rollers.
  • the simplest peristaltic pumps have only two pinch rollers and the pinch path forms at least a semicircle. In the case of a semicircle, it is difficult and complex to generate a uniform radial squeezing force with the resilient squeeze path. That is why the cheaper peristaltic pumps with only two pinch rollers also have spring-loaded rollers, which in turn means an increase in price.
  • Peristaltic pumps in which the squeeze track resiliently presses against the rollers are usually designed to be even more complex.
  • the Quetschbahn is almost a straight line (/ 8 circle l) is performed; at the hose pump according to PCT / WO 82/00498 the Quetschbahn forms a quarter circle, as in the tube pump according to DE-C 26 51 962 in which case the adjustment of the Quetschbahn or its abutment is critical.
  • the object of the invention is to further develop the hose pump of the type mentioned at the outset such that the hose can be easily replaced and a uniformly large squeezing force can be achieved without additional structural effort along the roller circle.
  • the invention proposes, starting from a peristaltic pump of the type mentioned at the outset, that the ring is of resilient design, has a smaller diameter than the circumference of the roller in the relaxed circular state, is elastically oval or multi-arcuate deformed by the pressing forces in the inserted state and is radial formable but secured against circulation.
  • the resilient ring can be designed, for example, as a spring steel ring which surrounds a plastic ring which is not too hard and into which the hose is inserted in a non-slip manner. For assembly purposes, this ring can be compressed into an ellipse and placed over the pinch rollers.
  • the resilient ring has one or more axially parallel pins which protrude into radial elongated holes in the base plate and secure the ring against rotation without impeding its radial deformability.
  • the resilient ring is firmly connected to the hose, so that the hose and the ring form a replaceable unit.
  • This unit will usually be made entirely of plastic as a disposable valve; a reinforcement by a spring steel ring can usually be omitted.
  • the hose pump shown in the drawing has a resilient ring 1 which is glued to a hose 2.
  • the ring 1 is provided with two retaining pins 3, which are made of the same material as the ring 1, and encloses - elastically oval (see FIG. 1) or, in the case of more squeezing rolls, deformed in multiple arches - a rotor 4 which is provided with two squeezing rolls 5 which are guided by the rotor 4 along a circular path, the diameter of which is larger than the diameter of the corresponding undeformed ring 1 (cf. FIG. 3).
  • the rotor 4 is provided with a roller carrier 8, which protrudes slightly beyond the roller surface so that the ring 1 cannot slide off the pinch rollers 5.
  • the spring ring 1 provided with the hose 2 is deformed by hand into an ellipse and placed over the rotor 4 such that it surrounds the two pinch rollers 5 and the retaining pins 3 engage in the elongated holes 6 of the base plate 7.
  • the resilient ring 1 remains deformed so that its spring force presses evenly radially against the pinch rollers 5.
  • the test model showed that the peristaltic pump according to the invention is functional even without gluing between the hose 2 and the resilient ring 1. In this case, the clamping of the hose on the bushing 9 by the elastic ring 1 is already sufficient for the hose 2 to be adequately held.

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

Abstract

Tubular pump in which the pipe is squeezed in at least one point between rollers which are moved circularly on a squeezing path and in which the liquid or gas to be carried is transported by the movement of the squeeze. In order to produce in such a tubular pump, of simple design, a uniform squeezing pressure over the entire squeeze path and to be able to change the pump (2) easily, this invention entails the use of an elastic ring (1) which closely surrounds the roller circle and presses the pipe (2) against the squeeze rollers, the elastic ring (1) being firmly connected to the pump, so that the pipe (2) and the ring (1) form an interchangeable unit.

Description

Die Erfindung betrifft eine Schlauchpumpe mit auf einer Kreisbahn umlaufenden Quetschrollen und einem den Rollenkreis eng umschliessenden Ring, der einen an seinem inneren Umfang angeordneten Schlauch gegen die Quetschrollen anpresst.The invention relates to a peristaltic pump with pinch rollers rotating on a circular path and a ring which tightly surrounds the roller circle and presses a hose arranged on its inner circumference against the pinch rollers.

Solche Schlauchpumpen - oft auch als «Rollenpumpen» oder «Peristaltische Pumpen» bezeichnet-werden als Laborgeräte verwendet und finden darüberhinaus besonders vielfältige Anwendung in der Medizintechnik. In der Medizintechnik werden sie sehr häufig bei Routineaufgaben eingesetzt, bei denen ein rasches und sicheres Einlegen des Schlauches erforderlich ist. Hierbei ist der Schlauch gewöhnlich ein Wegwerfteil, welches nur einmal benutzt wird.Peristaltic pumps of this type - often also referred to as “roller pumps” or “peristaltic pumps” - are used as laboratory devices and are also used in a variety of ways in medical technology. In medical technology, they are used very frequently for routine tasks that require the hose to be inserted quickly and safely. The hose is usually a disposable part that is used only once.

Eine Schlauchpumpe der eingangs genannten Art ist beispielsweise aus der FR-A-1 067 081 bekannt. Bei dieser bekannten Schlauchpumpe sind die Quetschrollen unelastisch an dem Rotor gelagert. Ebenso ist der den Rollenkreis eng umschliesssende Ring weitgehend unelastisch ausgebildet, so dass beim Zusammenbau eine ausserordentlich grosse Passgenauigkeit erforderlich ist, um entlang dem Rollenkreis gleichmässige Quetschkräfte zu erzielen. Dementsprechend ist bei dieser vorbekannten Schlauchpumpe das Auswechseln des Schlauches ausserordentlich zeitaufwendig.A peristaltic pump of the type mentioned at the outset is known, for example, from FR-A-1 067 081. In this known peristaltic pump, the pinch rollers are inelastically mounted on the rotor. Likewise, the ring which closely surrounds the roller circle is largely inelastic, so that an extraordinarily great fit is required during assembly in order to achieve uniform squeezing forces along the roller circle. Accordingly, in this known hose pump, changing the hose is extremely time-consuming.

Eine Schlauchpumpe, bei der die Handhabung, insbesondere das Einlegen des Schlauches bedeutend erleichtert ist, ist in der DE-B-23 58 228 beschrieben. Diese und andere Schlauchpumpen für die erleichterte Handhabung erfordern jedoch einen erhöhten konstruktiven Aufwand für den ohnehin schon nicht sehr einfachen mechanischen Aufbau der Schlauchpumpen.A peristaltic pump, in which handling, in particular the insertion of the hose, is significantly facilitated, is described in DE-B-23 58 228. These and other peristaltic pumps for easier handling, however, require an increased design effort for the already not very simple mechanical construction of the peristaltic pumps.

Ob die Rollen federnd gegen die feste Quetschbahn oder die Quetschbahn federnd gegen die Rollen drückt, ist für die Funktion der Schlauchpumpe unerheblich. Die einfachsten Schlauchpumpen besitzen nur zwei Quetschrollen und die Quetschbahn bildet mindestens einen Halbkreis. Bei einem Halbkreis ist es schwierig und aufwendig, mit der federnden Quetschbahn eine gleichmässige radiale Quetschkraft zu erzeugen. Deshalb haben auch die billigeren Schlauchpumpen mit nur zwei Quetschrollen federnd gelagerte Rollen, was wiederum eine Verteuerung bedeutet. Schlauchpumpen, bei denen die Quetschbahn federnd gegen die Rollen drückt, sind in der Regel noch aufwendiger konstruiert. Bei der Konstruktion nach der DE-B-23 58 228 ist die Quetschbahn nahezu geradlinig (l/8 -Kreis) ausgeführt; bei den Schlauchpumpen nach PCT/WO 82/00498 bildet die Quetschbahn einen 1/4-Kreis, ebenso bei der Schlauchpumpe nach DE-C 26 51 962, wobei dann die Justierung der Quetschbahn bzw. ihres Widerlagers kritisch ist.The function of the peristaltic pump is irrelevant whether the rollers press resiliently against the fixed squeeze track or the squeeze track resiliently presses against the rollers. The simplest peristaltic pumps have only two pinch rollers and the pinch path forms at least a semicircle. In the case of a semicircle, it is difficult and complex to generate a uniform radial squeezing force with the resilient squeeze path. That is why the cheaper peristaltic pumps with only two pinch rollers also have spring-loaded rollers, which in turn means an increase in price. Peristaltic pumps in which the squeeze track resiliently presses against the rollers are usually designed to be even more complex. In the construction according to DE-B-23 58 228, the Quetschbahn is almost a straight line (/ 8 circle l) is performed; at the hose pump according to PCT / WO 82/00498 the Quetschbahn forms a quarter circle, as in the tube pump according to DE-C 26 51 962 in which case the adjustment of the Quetschbahn or its abutment is critical.

Aufgabe der Erfindung ist es, die Schlauchpumpe der eingangs genannten Art dahingehend weiterzubilden, dass der Schlauch leicht ausgewechselt werden kann und ohne zusätzlichen baulichen Aufwand entlang dem Rollenkreis eine gleichmässig grosse Quetschkraft erzielbar ist.The object of the invention is to further develop the hose pump of the type mentioned at the outset such that the hose can be easily replaced and a uniformly large squeezing force can be achieved without additional structural effort along the roller circle.

Zur Lösung dieser Aufgabe schlägt die Erfindung ausgehend von einer Schlauchpumpe der eingangs genannten Art vor, dass der Ring federnd ausgebildet ist, im entspannten kreisförmigen Zustand einen kleineren Durchmesser als der Rollenumkreis hat, im eingesetzten Zustand durch die Presskräfte elastisch oval oder mehrbogig verformt ist und radial ausformbar aber gegen Umlauf gesichert festgelegt ist.To achieve this object, the invention proposes, starting from a peristaltic pump of the type mentioned at the outset, that the ring is of resilient design, has a smaller diameter than the circumference of the roller in the relaxed circular state, is elastically oval or multi-arcuate deformed by the pressing forces in the inserted state and is radial formable but secured against circulation.

Der federnde Ring kann beispielsweise als Federstahlring ausgebildet sein, der einen nicht zu harten Kunststoffring umschliesst, in den der Schlauch rutschfest eingelegt ist. Zum Zwecke der Montage kann dieser Ring zu einer Ellipse zusammengedrückt und über die Quetschrollen gestülpt werden. Der federnde Ring weist einen oder mehrere achsparallele Stifte auf, die in radiale Langlöcherder Grundplatte hineinragen und den Ring gegen Verdrehen sichern, ohne seine radiale Verformbarkeit zu behindern.The resilient ring can be designed, for example, as a spring steel ring which surrounds a plastic ring which is not too hard and into which the hose is inserted in a non-slip manner. For assembly purposes, this ring can be compressed into an ellipse and placed over the pinch rollers. The resilient ring has one or more axially parallel pins which protrude into radial elongated holes in the base plate and secure the ring against rotation without impeding its radial deformability.

Um die Handhabung, insbesondere für Routinearbeiten in der Medizin, zu erleichtern, wird nach einer weiteren Ausgestaltung der Erfindung der federnde Ring fest mit dem Schlauch verbunden, so dass der Schlauch und der Ring eine auswechselbare Einheit bilden.In order to facilitate handling, in particular for routine work in medicine, according to a further embodiment of the invention the resilient ring is firmly connected to the hose, so that the hose and the ring form a replaceable unit.

Diese Einheit wird gewöhnlich als Wegwerfventil ganz aus Kunststoff bestehen; eine Verstärkung durch einen Federstahlring kann meist entfallen.This unit will usually be made entirely of plastic as a disposable valve; a reinforcement by a spring steel ring can usually be omitted.

Die mit der Erfindung erzielten Vorteile bestehen insbesondere darin, dass die Handhabung der Schlauchpumpe einfach ist und wegen der Einfachheit der Konstruktion die Herstellungskosten niedrig sind.The advantages achieved with the invention consist in particular in that the handling of the peristaltic pump is simple and the manufacturing costs are low because of the simplicity of the construction.

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und wird im folgenden näher beschrieben. Es zeigen:

  • Fig. 1 eine Draufsicht auf die Grundplatte und den Rotor einer Schlauchpumpe gemäss der Erfindung;
  • Fig. 2 einen Schnitt durch die Grundplatte und den Rotor der Schlauchpumpe gemäss der Erfindung;
  • Fig. 3 einen Schnitt durch den federnden Ring mit Schlauch der Schlauchpumpe gemäss der Erfindung entlang der Linie 111-111 in Fig. 4;
  • Fig. 4 einen Schnitt durch den federnden Ring mit Schlauch der Schlauchpumpe gemäss der Erfindung entlang der Linie IV-IV in Fig. 3.
An embodiment of the invention is shown in the drawing and will be described in more detail below. Show it:
  • Figure 1 is a plan view of the base plate and the rotor of a hose pump according to the invention.
  • 2 shows a section through the base plate and the rotor of the hose pump according to the invention;
  • 3 shows a section through the resilient ring with hose of the hose pump according to the invention along the line 111-111 in Fig. 4.
  • 4 shows a section through the resilient ring with hose of the hose pump according to the invention along the line IV-IV in FIG. 3.

Die in der Zeichnung dargestellte Schlauchpumpe weist einen federnden Ring 1 auf, der mit einem Schlauch 2 verklebt ist. Der Ring 1 ist mit zwei Haltestiften 3 versehen, die aus dem gleichen Material wie der Ring 1 bestehen, und umschliesst - elastisch oval (vgl. Fig. 1) oder bei mehr Quetschrollen mehrbogig verformt - einen Rotor 4, der mit zwei Quetschrollen 5 versehen ist, die von dem Rotor 4 entlang einer Kreisbahn geführt werden, deren Durchmesser grösser ist, als der Durchmesser des entsprechenden unverformten Ringes 1 (vgl. Fig. 3). Die parallel zur Achse des Ringes 1 verlaufenden Haltestifte 3 greifen in radial verlaufende Langlöcher 6 einer Grundplatte 7 ein, derart, dass der Ring 1 gegen Verdrehung gesichert, in radialer Richtung jedoch nicht festgelegt ist. Der Rotor 4 ist mit einem Rollenträger 8 versehen, der etwas über die Rollenoberfläche hinaussteht so dass der Ring 1 nicht von den Quetschrollen 5 abrutschen kann.The hose pump shown in the drawing has a resilient ring 1 which is glued to a hose 2. The ring 1 is provided with two retaining pins 3, which are made of the same material as the ring 1, and encloses - elastically oval (see FIG. 1) or, in the case of more squeezing rolls, deformed in multiple arches - a rotor 4 which is provided with two squeezing rolls 5 which are guided by the rotor 4 along a circular path, the diameter of which is larger than the diameter of the corresponding undeformed ring 1 (cf. FIG. 3). The holding pins 3 running parallel to the axis of the ring 1 engage in radially extending elongated holes 6 of a base plate 7 in such a way that the ring 1 is secured against rotation, but is not fixed in the radial direction. The rotor 4 is provided with a roller carrier 8, which protrudes slightly beyond the roller surface so that the ring 1 cannot slide off the pinch rollers 5.

Zur Montage wird der mit dem Schlauch 2 versehene Federring 1 mit der Hand zu einer Ellipse verformt und über den Rotor 4 gestülpt, derart, dass er die beiden Quetschrollen 5 umschliesst und die Haltestifte 3 in die Langlöcher 6 der Grundplatte 7 eingreifen. Der federnde Ring 1 bleibt dabei verformt, so dass seine Federkraft gleichmässig radial gegen die Quetschrollen 5 drückt.For assembly, the spring ring 1 provided with the hose 2 is deformed by hand into an ellipse and placed over the rotor 4 such that it surrounds the two pinch rollers 5 and the retaining pins 3 engage in the elongated holes 6 of the base plate 7. The resilient ring 1 remains deformed so that its spring force presses evenly radially against the pinch rollers 5.

Beim Versuchsmodell zeigte sich, dass die Schlauchpumpe gemäss der Erfindung auch ohne Verklebung zwischen dem Schlauch 2 und dem federnden Ring 1 funktionstüchtig ist. In diesem Falle reicht die Klemmung des Schlauches an der Durchführung 9 durch den elastischen Ring 1 bereits für eine ausreichende Halterung des Schlauches 2 aus.The test model showed that the peristaltic pump according to the invention is functional even without gluing between the hose 2 and the resilient ring 1. In this case, the clamping of the hose on the bushing 9 by the elastic ring 1 is already sufficient for the hose 2 to be adequately held.

Claims (2)

1. A peristaltic pump comprising squeeze rollers (5) which rotate on a circular path and a ring (1) which closely embraces the circle of movement of the rollers and which presses against the squeeze rollers (5) a tube (2) which is arranged at the inner periphery of the ring, characterised in that the ring (1) is of a resilient nature, in the unstressed circular condition it is of smaller diameter than the circular path of movement of the rollers, in the fitted condition it is elastically deformed in an oval or multi-arc configuration by the pressure forces, and it is fixed in such a way that it can be radially outwardly deformed but is prevented from rotating.
2. A peristaltic pump according to claim 1 characterised in that the resilient ring (1) is fixedly connected to the tube (2) to provide a unit which can be replaced as a whole.
EP85902506A 1984-05-07 1985-05-07 Peristaltic pump Expired EP0180632B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85902506T ATE38266T1 (en) 1984-05-07 1985-05-07 HOSE PUMP.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3416776A DE3416776A1 (en) 1984-05-07 1984-05-07 HOSE PUMP
DE3416776 1984-05-07

Publications (2)

Publication Number Publication Date
EP0180632A1 EP0180632A1 (en) 1986-05-14
EP0180632B1 true EP0180632B1 (en) 1988-10-26

Family

ID=6235107

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85902506A Expired EP0180632B1 (en) 1984-05-07 1985-05-07 Peristaltic pump

Country Status (3)

Country Link
EP (1) EP0180632B1 (en)
DE (2) DE3416776A1 (en)
WO (1) WO1985005153A1 (en)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1351813A (en) * 1964-05-11 Mecanique Generale De L Ouest Epicyclic roller pump
US2483924A (en) * 1946-06-10 1949-10-04 Moulinier Edmond Jean Pump
FR1067081A (en) * 1952-11-24 1954-06-11 Compression device for refrigeration installations
FR1328484A (en) * 1962-04-18 1963-05-31 Roller pump
DE2153052A1 (en) * 1971-10-25 1973-05-03 Allen Longford & Associates Lt PERISTALTIC PUMP

Also Published As

Publication number Publication date
EP0180632A1 (en) 1986-05-14
DE3416776A1 (en) 1985-11-07
DE3565875D1 (en) 1988-12-01
WO1985005153A1 (en) 1985-11-21

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