EP1342011B1 - Peristaltic hose pump - Google Patents

Peristaltic hose pump Download PDF

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Publication number
EP1342011B1
EP1342011B1 EP01995604A EP01995604A EP1342011B1 EP 1342011 B1 EP1342011 B1 EP 1342011B1 EP 01995604 A EP01995604 A EP 01995604A EP 01995604 A EP01995604 A EP 01995604A EP 1342011 B1 EP1342011 B1 EP 1342011B1
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EP
European Patent Office
Prior art keywords
roller wheel
axis
pump according
peristaltic
hose
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 - Lifetime
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EP01995604A
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German (de)
French (fr)
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EP1342011A1 (en
Inventor
Christian Haser
Peter Zentner
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WOM World of Medicine GmbH
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WOM World of Medicine GmbH
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Publication date
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Publication of EP1342011A1 publication Critical patent/EP1342011A1/en
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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
    • F04B43/12—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
    • F04B43/1284—Means for pushing the backing-plate against the tubular flexible member
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2225/00—Synthetic polymers, e.g. plastics; Rubber

Definitions

  • the invention relates to a peristaltic peristaltic pump with a roller wheel rotatable about a roller wheel axis with rollers mounted on the roller wheel, wherein the rollers roll on a circular path with a specific radius related to the roller wheel axis, and with a pressure bar with a support surface, wherein the support surface along a circular path determined radius runs around the axis of rotation of the roller wheel and wherein between the support surface and the rollers of the roller wheel, a flexible hose can be inserted.
  • a peristaltic peristaltic pump of the aforementioned construction is known from DE-G 83 29 579 previously.
  • the pressure bar is formed by a deformable band which is firmly clamped at one end and held adjustable at the other end in its axial direction, whereby an adaptation to different tube diameter is made possible.
  • the existing of a metallic material, plastic or a fabric band has demnm disadvantage of too high elasticity.
  • the elastic band is stretched over the rollers and extends between the rollers each straight, whereby the liquid delivery space formed in the flexible tube is reduced, so that the transported flow rate and thus the delivery rate are relatively low.
  • a peristaltic peristaltic pump with a rigid pressure bar is also known from practice.
  • precision hoses with small tolerances are used and the mechanical parts are manufactured and assembled with high precision. Nevertheless, errors occur due to hose tolerances and manufacturing and assembly tolerances of the mechanical parts.
  • the rigid pressure bar is pressed against the roller wheel with a spring, as e.g. in Arthroskopiepumpen the company Stryker, Arthrex and FMS is known.
  • the disadvantage here is that the introduced spring force is directed and the tube exactly abuts only in the role position in the force direction line. In all other positions of the role only one component of the spring force is effective. At the 90 ° position of the roller to the spring force direction, this component is equal to zero. As a result, only a limited tolerance compensation is possible. It can not be produced high pressures for high flow rates.
  • the invention is therefore based on the technical problem of providing a peristaltic peristaltic pump with improved delivery pressure, in particular also with likewise improved delivery rates.
  • the invention provides that the support surface is formed of an elastically deformable plastic and that the pressure bar is preformed with the proviso that the course of the support surface in the unloaded state of the Anyakbügels substantially corresponds to the course of the support surface in the tensioned state.
  • the unloaded state corresponds to a mounting position of the Anyakbügels, in which a tube is inserted.
  • the tensioned state corresponds to an operating position in which the support surface is moved relative to the mounting position in directions to the roller wheel axis of rotation, wherein the hose between rollers and support surface is clamped.
  • the clamping bracket is mounted or fixed in both positions in the region of its two ends and running freely between them, ie is not supported by other components.
  • the Anyakbügel of rigid, metallic material and is provided with the support surface of the elastically deformable plastic.
  • the pressure bar is formed entirely from the elastically deformable plastic.
  • the plastic is preferably polyoxymethylene (POM).
  • POM polyoxymethylene
  • the pressure bar is made of materials with great elasticity and can be structurally designed so that it clamps when closing by a self-deformation with a bias the hose on the rollers. During the movement of the roller wheel, the elastic deformation (preload) runs with the roller through the Andschreibbügel.
  • roller wheels 1 show the front panel 15 of a device housing for two peristaltic peristaltic pumps 20,21, the roller wheels 1 are equipped with four rollers 2 and driven by mounted on the back of the front panel 15 electric drive motors 16.
  • Each roller wheel 1 with four rollers 2 is assigned a pressure bar 3 with a support surface 4 on the side facing the rollers 2, wherein the support surface 4 is provided with an inlet region 5, a central region 6 and an outlet region 7, as shown in FIG is shown.
  • the pressure bar 3 is pivotally mounted about an arranged on the front panel 15 pivot axis 8 and provided at its opposite end with a clamping pin 10 which engages on the one hand in a clamping bracket 25 and on the other hand with the clamping lugs 26, 27 a clamping plate 24 cooperates on the front panel 15 is permanently mounted.
  • a closure plate 13 With the clamping bracket 25, a closure plate 13 is fixedly connected, which is pivotable by means of an attached thereto actuating element 11.
  • the rollers 2 of the peristaltic peristaltic pumps 20, 21 roll on a circular path with the radius R1 relative to the axis of rotation D of the roller wheel 1 along the support surface 4 of the pressure bar 3, wherein the support surface 4 along a circular path with the radius R2 about the axis of rotation D of the roller wheel 1 runs and wherein between the support surface 4 and the rollers 2 of the roller wheel 1, a flexible hose 19 is inserted.
  • the pressure bar 3 and the support surface 4 are integrally formed from an elastically deformable plastic.
  • the pressure bar 3 also made of metallic material exist and be provided with an internal covering made of plastic, which forms the support surface 4.
  • the pressure bar 3 is preformed with the proviso that the course of the support surface 4 in the unloaded state of the Andruckbügels 3 substantially corresponds to the course of the support surface 4 in the tensioned state.
  • the preferred plastic used is polyoxymethylene (POM). Delrin is preferably used by Dupont or Hostaform by Hoechst.
  • the tensile modulus is preferably ⁇ 3000 MPa (megapascals).
  • the bending fatigue strength is preferably ⁇ 30 MPa.
  • the impact strength at a room temperature of 23 ° C is preferably ⁇ 130 KJ / m 2 (kilojoules per square meter).
  • the coefficient of sliding friction against steel in dry running is preferably ⁇ 0.30.
  • Such a plastic POM has proven in tests to be particularly suitable for the support surface 4 of the Andruckbügels 3 of the peristaltic pumps 20, 21.
  • the pressure bar 4 each peristaltic pump 20, 21 is opposite a fixedly mounted on the front panel 15 holder 17 with two through holes 18 for inserting a flexible hose 19, which is each directed tangentially to the roller wheel 1 and on the inside of the Anyakbügels 3 on the support surface 4 for Plant comes.
  • the pressure bar 4 has an inlet area 5, a central area 6 and an outlet area 7, wherein the pressure bar 3, at least in the outlet area 7, preferably also in the inlet area 5, has an enlarged cross-section compared to the central area 6.
  • the center region 6 extends, with respect to the axis of rotation D of the roller wheel 1, over an angle of 10 to 90 °, preferably from 20 to 60 °, based on the looping of the roller wheel 1 through the hose 19.
  • the pressure bar 3 extends, relative to the axis of rotation D, over an angle of 90 ° to 180 °, preferably from 120 ° to 170 °.
  • Anyakbügel 3 is at its other end by means of the clamping device 9 between a mounting position I for the hose 19 and an operating position II for the hose 19th pivotable.
  • the clamping device 9 arranged on the second end of the Anyakbügels 3 clamping pin 10 and about a parallel to the axis of rotation D of the roller wheel 1 clamping axis S rotatable closure plate 13 with an actuating element 11.
  • the cap 13 covers in the operating position II, the roller wheel 1 and the inserted tube 19 from the front and thus fixes the hose 19 in the direction of the axis of rotation D of the roller wheel 1.
  • the cap 13 is frictionally engaged in the operating position II.
  • the roller wheel 1 and / or the pressure bar 3 are interchangeable.
  • the roller wheel 1 and / or the pressure bar 3 can be selected with regard to the radius difference R2-R1 with the proviso that in the mounting position I a predetermined tube 19 with an outside diameter smaller than R2-R1 can be inserted.
  • the roller wheel 1 and / or the pressure bar 3 can be selected with regard to the radius difference R2-R1 with the proviso that a predetermined tube with a wall thickness of ⁇ R2-R1 / 2 can be used.
  • the illustrated peristaltic peristaltic pumps 20, 21 form an arthroscopy pump, in which the hose pump 20 shown on the left in FIG. 1 forms the suction side and the peristaltic pump 21 shown on the right in FIG. 1 forms the flushing side.
  • the suction side hose pump 20 rotates clockwise.
  • the hose pump 21 of the purge side turns counterclockwise.
  • Two peristaltic pumps 20, 21 are assigned holders 22 for the hose 19. In the holders 22 pressure sensors are arranged. Between the two peristaltic pumps 20, 21, the front panel 15 includes a window 23 for a display for displaying the values of pressure, flow rate and the like. the arthroscopy pump.
  • the pressure bar 3, at least in the middle region 6, has a slot-shaped recess which extends along a circular path and the axis of rotation D of the roller wheel 1.

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

Abstract

A peristaltic hose pump comprising a roller wheel, which can rotate about a roller wheel axis and which has rollers that are mounted on the roller wheel. The rollers roll along a circular path having a certain radius with respect to the roller wheel axis. The peristaltic hose pump also comprises a pressure arched element with a supporting surface, whereby the supporting surface extends along a circular path having a certain radius around the rotation axis of the roller wheel. In addition, a flexible hose can be inserted between the supporting surface and the rollers of the roller wheel.

Description

Gebiet der ErfindungField of the invention

Die Erfindung bezieht sich auf eine peristaltische Schlauchpumpe mit einem um eine Rollenraddrehachse drehbaren Rollenrad mit auf dem Rollenrad angebrachten Rollen, wobei die Rollen auf einer Kreisbahn mit einem bestimmten, auf die Rollenraddrehachse bezogenen Radius abrollen, und mit einem Andruckbügel mit einer Stützfläche, wobei die Stützfläche entlang einer Kreisbahn bestimmten Radius um die Drehachse des Rollenrades verläuft und wobei zwischen der Stützfläche und den Rollen des Rollenrades ein flexibler Schlauch einlegbar ist.The invention relates to a peristaltic peristaltic pump with a roller wheel rotatable about a roller wheel axis with rollers mounted on the roller wheel, wherein the rollers roll on a circular path with a specific radius related to the roller wheel axis, and with a pressure bar with a support surface, wherein the support surface along a circular path determined radius runs around the axis of rotation of the roller wheel and wherein between the support surface and the rollers of the roller wheel, a flexible hose can be inserted.

Stand der TechnikState of the art

Eine peristaltische Schlauchpumpe des eingangs genannten Aufbaus ist aus dem DE-G 83 29 579 vorbekannt. Hierbei ist der Andruckbügel durch ein verformbares Band gebildet, das an einem Ende fest eingespannt und am anderen Ende in seiner Achsrichtung verstellbar gehalten ist, wodurch eine Anpassung an unterschiedliche Schlauchdurchmesser ermöglicht wird. Das aus einem metallischen Werkstoff, aus Kunststoff oder aus einem Gewebe bestehende Band hat demnm Nachteil einer zu hohen Elastizität. Ferner wird das elastische Band über die Rollen gespannt und verläuft zwischen den Rollen jeweils gerade, wodurch der im flexiblen Schlauch gebildete Flüssigkeits-Förderraum verringert wird, so daß die transportierte Fördermenge und damit die Förderleistung relativ gering sind.A peristaltic peristaltic pump of the aforementioned construction is known from DE-G 83 29 579 previously. Here, the pressure bar is formed by a deformable band which is firmly clamped at one end and held adjustable at the other end in its axial direction, whereby an adaptation to different tube diameter is made possible. The existing of a metallic material, plastic or a fabric band has demnm disadvantage of too high elasticity. Further, the elastic band is stretched over the rollers and extends between the rollers each straight, whereby the liquid delivery space formed in the flexible tube is reduced, so that the transported flow rate and thus the delivery rate are relatively low.

Um mit peristaltischen Schlauchpumpen hohe Drücke und Förderleistungen zu erzielen und eine exakte Abklemmung des Schlauches zwischen den Rollen des Rollenrades und dem Andruckbügel zu erreichen, ist aus der Praxis ferner eine peristaltische Schlauchpumpe mit einem starren Andruckbügel bekannt. Hierbei werden Präzisionsschläuche mit kleinen Toleranzen eingesetzt und die mechanischen Teile mit hoher Präzision gefertigt und montiert. Dennoch treten Fehler durch Schlauchtoleranzen und durch Fertigungs- und Montagetoleranzen der mechanischen Teile auf. Da somit Toleranzen nicht gänzlich ausgeschlossen werden können, wird zu deren Ausgleich der starre Andruckbügel mit einer Feder an das Rollenrad gedrückt, wie es z.B. bei Arthroskopiepumpen der Firmen Stryker, Arthrex und FMS bekannt ist. Nachteilig hierbei ist, daß die eingebrachte Federkraft gerichtet ist und den Schlauch nur bei der Rollenstellung in der Kraftrichtungslinie exakt abdrückt. Bei allen anderen Stellungen der Rolle wird immer nur eine Komponente der Federkraft wirksam. Bei der 90°-Stellung der Rolle zur Federkraftrichtung ist diese Komponente gleich Null. Dadurch ist nur ein eingeschränkter Toleranzausgleich möglich. Es können keine hohen Drücke für große Förderleistungen erzeugt werden.In order to achieve high pressures and flow rates with peristaltic peristaltic pumps and to achieve an exact clamping of the tube between the rollers of the roller wheel and the pressure bar, a peristaltic peristaltic pump with a rigid pressure bar is also known from practice. Here, precision hoses with small tolerances are used and the mechanical parts are manufactured and assembled with high precision. Nevertheless, errors occur due to hose tolerances and manufacturing and assembly tolerances of the mechanical parts. Thus, since tolerances can not be completely ruled out, to compensate for them, the rigid pressure bar is pressed against the roller wheel with a spring, as e.g. in Arthroskopiepumpen the company Stryker, Arthrex and FMS is known. The disadvantage here is that the introduced spring force is directed and the tube exactly abuts only in the role position in the force direction line. In all other positions of the role only one component of the spring force is effective. At the 90 ° position of the roller to the spring force direction, this component is equal to zero. As a result, only a limited tolerance compensation is possible. It can not be produced high pressures for high flow rates.

Aus dem DE-G 85 04 221 ist eine peristaltische Schlauchpumpe mit einem starren Andrückbügel bekannt.From DE-G 85 04 221 a peristaltic peristaltic pump with a rigid Andrückbügel is known.

Technisches Problem der ErfindungTechnical problem of the invention

Der Erfindung liegt von daher das technische Problem zugrunde, eine peristaltische Schlauchpumpe mit verbessertem Förderdruck bereit zu stellen, und zwar insbesondere auch bei ebenfalls verbesserten Förderleistungen.The invention is therefore based on the technical problem of providing a peristaltic peristaltic pump with improved delivery pressure, in particular also with likewise improved delivery rates.

Grundzüge der Erfindung und bevorzugte AusführungsformenBroad features of the invention and preferred embodiments

Zu Lösung dieser Aufgabe sieht die Erfindung vor, daß die Stützfläche aus einem elastisch verformbaren Kunststoff gebildet ist und daß der Andruckbügel mit der Maßgabe vorgeformt ist, daß der Verlauf der Stützfläche im entlasteten Zustand des Andruckbügels im wesentlichen dem Verlauf der Stützfläche im gespannten Zustand entspricht. Hierdurch wird eine gleichbleibende Abklemmung des Schlauches zwischen Rolle und Andruckbügel in jeder Stellung der Rolle zum Andruckbügel erreicht. Bei der Umlaufbewegung des Rollenrades läuft die elastische Deformation (Vorspannung) mit der Rolle durch den Andruckbügel, so daß die Klemmkraft immer senkrecht zur Rolle eingebracht wird. Damit können größere Schlauch-, Fertigungs- und Montagetoleranzen ausgeglichen werden, womit erhebliche Kosten bei der Herstellung der Schlauchpumpe eingespart werden. Im Vergleich zu einem starren Andruckbügel können - je nach konstruktiver Gestaltung der elastisch verformbaren Stützfläche des Andruckbügels - die erzielbaren Drücke und Förderleistungen um mindestens 50% gesteigert werden. Es können Förderleistungen von mehr als 2 l/min bis über 3 l/min erreicht werden. Der entlastete Zustand entspricht einer Montageposition des Andruckbügels, in welcher ein Schlauch einlegbar ist. Der gespannte Zustand entspricht einer Betriebsposition, in welcher die Stützfläche gegenüber der Montageposition in Richtungen zur Rollenraddrehachse bewegt ist, wobei der Schlauch zwischen Rollen und Stützfläche geklemmt wird. Dabei ist der Spannbügel in beiden Positionen im Bereich seiner beiden Enden gelagert bzw. fixiert und dazwischen frei verlaufend, i.e. wird nicht durch weitere Bauelemente gestützt.To solve this problem, the invention provides that the support surface is formed of an elastically deformable plastic and that the pressure bar is preformed with the proviso that the course of the support surface in the unloaded state of the Andruckbügels substantially corresponds to the course of the support surface in the tensioned state. As a result, a consistent clamping of the tube between the roller and pressure bar is achieved in any position of the role to Andruckbügel. During the orbital movement of the roller wheel, the elastic deformation (bias) with the roller passes through the Andruckbügel, so that the clamping force is always introduced perpendicular to the roll. This allows greater hose, manufacturing and assembly tolerances are compensated, which saves considerable costs in the production of the peristaltic pump. Compared to a rigid pressure bar - depending on the design of the elastically deformable support surface of the Andruckbügels - the achievable pressures and flow rates can be increased by at least 50%. Flow rates of more than 2 l / min to more than 3 l / min can be achieved. The unloaded state corresponds to a mounting position of the Andruckbügels, in which a tube is inserted. The tensioned state corresponds to an operating position in which the support surface is moved relative to the mounting position in directions to the roller wheel axis of rotation, wherein the hose between rollers and support surface is clamped. In this case, the clamping bracket is mounted or fixed in both positions in the region of its two ends and running freely between them, ie is not supported by other components.

Beim Stand der Technik nach DE-G 83 29 579 wird das elastische Band über die Rollen gespannt und verläuft zwischen den Rollen jeweils gerade, wodurch der im flexiblen Schlauch enthaltene Flüssigkeits-Förderraum verringert wird, so daß die transportierte Fördermenge und damit die Förderleistung relativ gering sind. Der starre, über eine Feder an das Rollenrad gedrückte Andruckbügel drückt den Schlauch dagegen nur in der Rollenstellung in der Kraftrichtungslinie der Federkraft exakt ab, so daß keine hohen Drücke für große Förderleistungen erzeugt werden können. Mit der erfindungsgemäßen Schlauchpumpe wird demgegenüber erreicht, daß zwischen jeweils zwei Rollen genügend Raum vorhanden ist, um die Flüssigkeit zu transportieren, und daß gleichzeitig hohe Drücke bei großer Förderleistung erzielbar sind. Die Erfindung behebt somit die den vorbekannten Schlauchpumpen anhaftenden Nachteile.In the prior art according to DE-G 83 29 579, the elastic band is stretched over the rollers and extends between the rollers each straight, whereby the liquid contained in the flexible hose delivery chamber is reduced, so that the transported flow rate and thus the flow rate relatively low are. The rigid, pressed by a spring to the roller wheel Andruckbügel presses the hose against it only in the role position in the force direction of the spring force exactly from, so that no high pressures can be generated for large flow rates. With the hose pump according to the invention is achieved contrast that between two roles enough space is available to transport the liquid, and that at the same time high pressures at high flow rates can be achieved. The invention thus eliminates the disadvantages inherent in the previously known peristaltic pumps.

In einer Ausführungsform besteht der Andruckbügel aus starrem, metallischen Werkstoff und ist mit der Stützfläche aus dem elastisch verformbaren Kunststoff versehen. In einer weiteren Ausführungsform ist der Andruckbügel insgesamt aus dem elastisch verformbaren Kunststoff gebildet. Der Kunststoff ist in bevorzugter Weise Polyoxymethylen (POM). Dadurch wird der Andruckbügel aus Materialien mit großer Elastizität gefertigt und kann konstruktiv so gestaltet werden, daß er beim Schließen durch eine Eigenverformung mit einer Vorspannung den Schlauch auf den Rollen abklemmt. Bei der Bewegung des Rollenrades läuft die elastische Deformation (Vorspannung) mit der Rolle durch den Andrückbügel.In one embodiment, the Andruckbügel of rigid, metallic material and is provided with the support surface of the elastically deformable plastic. In a further embodiment, the pressure bar is formed entirely from the elastically deformable plastic. The plastic is preferably polyoxymethylene (POM). As a result, the pressure bar is made of materials with great elasticity and can be structurally designed so that it clamps when closing by a self-deformation with a bias the hose on the rollers. During the movement of the roller wheel, the elastic deformation (preload) runs with the roller through the Andrückbügel.

Weitere vorteilhafte Ausgestaltungen der Erfindung ergeben sich aus den weiteren Unteransprüchen. Hierbei wird insbesondere auf die Spannvorrichtung gemäß Unteranspruch 8 hingewiesen. Diese spannt den Andruckbügel gleichzeitig mit dem Schließen der Schlauchpumpe, so daß die Bedienungsperson mit ihren Fingern nicht zwischen Rollen und Andruckbügel im gespannten Zustand gelangen kann.Further advantageous embodiments of the invention will become apparent from the other dependent claims. In this case, particular attention is drawn to the clamping device according to dependent claim 8. This biases the Andruckbügel simultaneously with the closing of the peristaltic pump, so that the operator can not get their fingers between roles and Andruckbügel in the tensioned state.

Ausführungsbeispieleembodiments

Die Erfindung ist nachfolgend anhand einer in den Zeichnungen dargestellten Ausführungsformen näher erläutert. Es zeigen:

Fig. 1:
die perspektivische Darstellung der Frontplatte des Gerätehäuses für zwei peristaltische Schlauchpumpen ohne eingelegte flexible Schläuche, wobei die linke Schlauchpumpe geöffnet und die rechte Schlauchpumpe geschlossen ist,
Fig. 2:
eine perspektivische Darstellung auf die Frontplatte gemäß Fig. 1 ohne die Darstellung der Verschlußdeckel jeder Schlauchpumpe,
Fig. 3:
die Draufsicht auf die Darstellung nach Fig. 2 mit einem eingelegten Schlauch,
Fig. 4:
die perspektivische Frontansicht auf den Andruckbügel einer Schlauchpumpe und
Fig. 5:
die perspektivische Rückansicht auf den Andrückbügel mit Klemmscheibe.
The invention is explained in more detail with reference to an embodiment shown in the drawings. Show it:
Fig. 1:
the perspective view of the front panel of the device housing for two peristaltic peristaltic pumps without inserted flexible hoses, the left peristaltic pump is open and the right peristaltic pump is closed,
Fig. 2:
a perspective view of the front panel of FIG. 1 without the representation of the cap of each peristaltic pump,
3:
the top view of the illustration of FIG. 2 with an inserted tube,
4:
the front perspective view of the Andruckbügel a peristaltic pump and
Fig. 5:
the perspective rear view of the Andrückbügel with clamping disc.

Die Fig. 1 bis 3 zeigen die Frontplatte 15 eines Gerätegehäuses für zwei peristaltische Schlauchpumpen 20,21, deren Rollenräder 1 mit je vier Rollen 2 bestückt und von auf der Rückseite der Frontplatte 15 montierten elektrischen Antriebsmotoren 16 angetrieben sind. Jedem Rollenrad 1 mit vier Rollen 2 ist ein Andruckbügel 3 mit einer Stützfläche 4 auf der den Rollen 2 zugewandten Seite zugeordnet, wobei die Stützfläche 4 mit einem Einlaufbereich 5, einem Mittenbereich 6 und einem Auslaufbereich 7 versehen ist, wie es in Fig. 4 näher dargestellt ist. Der Andruckbügel 3 ist um eine auf der Frontplatte 15 angeordnete Schwenkachse 8 schwenkbar gelagert und an seinem entgegengesetzten Ende mit einem Spannstift 10 versehen, der einerseits in einen Spannbügel 25 eingreift und andererseits mit den Spannrasten 26, 27 einer Spannscheibe 24 zusammenwirkt, die auf der Frontplatte 15 fest montiert ist. Mit dem Spannbügel 25 ist eine Verschlußplatte 13 fest verbunden, die mittels eines an dieser angebrachten Betätigungselementes 11 verschwenkbar ist.1 to 3 show the front panel 15 of a device housing for two peristaltic peristaltic pumps 20,21, the roller wheels 1 are equipped with four rollers 2 and driven by mounted on the back of the front panel 15 electric drive motors 16. Each roller wheel 1 with four rollers 2 is assigned a pressure bar 3 with a support surface 4 on the side facing the rollers 2, wherein the support surface 4 is provided with an inlet region 5, a central region 6 and an outlet region 7, as shown in FIG is shown. The pressure bar 3 is pivotally mounted about an arranged on the front panel 15 pivot axis 8 and provided at its opposite end with a clamping pin 10 which engages on the one hand in a clamping bracket 25 and on the other hand with the clamping lugs 26, 27 a clamping plate 24 cooperates on the front panel 15 is permanently mounted. With the clamping bracket 25, a closure plate 13 is fixedly connected, which is pivotable by means of an attached thereto actuating element 11.

Die Rollen 2 der peristaltischen Schlauchpumpen 20, 21 rollen auf einer Kreisbahn mit dem Radius R1 bezogen auf die Drehachse D des Rollenrades 1 entlang der Stützfläche 4 des Andruckbügels 3, wobei die Stützfläche 4 entlang einer Kreisbahn mit dem Radius R2 um die Drehachse D des Rollenrades 1 verläuft und wobei zwischen der Stützfläche 4 und den Rollen 2 des Rollenrades 1 ein flexibler Schlauch 19 einlegbar ist. In der dargestellten Ausführungsform sind der Andruckbügel 3 und die Stützfläche 4 einstückig aus einem elastisch verformbaren Kunststoff ausgebildet. In einer nicht dargestellten Ausführungsform kann der Andruckbügel 3 auch aus metallischen Werkstoff bestehen und mit einem innenliegenden Belag aus Kunststoff versehen sein, der die Stützfläche 4 bildet. Der Andruckbügel 3 ist mit der Maßgabe vorgeformt, daß der Verlauf der Stützfläche 4 im entlasteten Zustand des Andruckbügels 3 im wesentlichen dem Verlauf der Stützfläche 4 im gespannten Zustand entspricht.The rollers 2 of the peristaltic peristaltic pumps 20, 21 roll on a circular path with the radius R1 relative to the axis of rotation D of the roller wheel 1 along the support surface 4 of the pressure bar 3, wherein the support surface 4 along a circular path with the radius R2 about the axis of rotation D of the roller wheel 1 runs and wherein between the support surface 4 and the rollers 2 of the roller wheel 1, a flexible hose 19 is inserted. In the illustrated embodiment, the pressure bar 3 and the support surface 4 are integrally formed from an elastically deformable plastic. In one embodiment, not shown, the pressure bar 3 also made of metallic material exist and be provided with an internal covering made of plastic, which forms the support surface 4. The pressure bar 3 is preformed with the proviso that the course of the support surface 4 in the unloaded state of the Andruckbügels 3 substantially corresponds to the course of the support surface 4 in the tensioned state.

Der vorzugsweise verwendete Kunststoff ist Polyoxymethylen (POM). Vorzugsweise werden Delrin von Dupont oder Hostaform von Hoechst verwendet. Der Zugelastizitätsmodul ist vorzugsweise ≥ 3000 MPa (Megapascal). Die Biegewechselfestigkeit ist vorzugsweise ≥ 30 MPa. Die Schlagzähigkeit bei einer Raumtemperatur von 23° C ist vorzugsweise ≥ 130 KJ/m2 (Kilojoule pro Quadratmeter). Die Gleitreibungszahl gegen Stahl im Trockenlauf ist vorzugsweise ≥ 0,30. Ein derart beschaffener Kunststoff POM hat sich in Versuchen als besonders geeignet für die Stützfläche 4 des Andruckbügels 3 der Schlauchpumpen 20, 21 erwiesen.The preferred plastic used is polyoxymethylene (POM). Delrin is preferably used by Dupont or Hostaform by Hoechst. The tensile modulus is preferably ≥ 3000 MPa (megapascals). The bending fatigue strength is preferably ≥ 30 MPa. The impact strength at a room temperature of 23 ° C is preferably ≥ 130 KJ / m 2 (kilojoules per square meter). The coefficient of sliding friction against steel in dry running is preferably ≥ 0.30. Such a plastic POM has proven in tests to be particularly suitable for the support surface 4 of the Andruckbügels 3 of the peristaltic pumps 20, 21.

Dem Andruckbügel 4 jeder Schlauchpumpe 20, 21 ist gegenüberliegend ein an der Frontplatte 15 festmontierter Halter 17 mit zwei Durchgangsöffnungen 18 zum Einlegen eines flexiblen Schlauches 19 zugeordnet, der jeweils tangential zum Rollenrad 1 gerichtet ist und auf der Innenseite des Andruckbügels 3 an der Stützfläche 4 zur Anlage kommt.The pressure bar 4 each peristaltic pump 20, 21 is opposite a fixedly mounted on the front panel 15 holder 17 with two through holes 18 for inserting a flexible hose 19, which is each directed tangentially to the roller wheel 1 and on the inside of the Andruckbügels 3 on the support surface 4 for Plant comes.

Der Andruckbügel 4 weist einen Einlaufbereich 5, einen Mittenbereich 6 und einen Auslaufbereich 7 auf, wobei der Andruckbügel 3 zumindest im Auslaufbereich 7, vorzugsweise auch im Einlaufbereich 5, einen gegenüber dem Mittenbereich 6 vergrößerten Querschnitt aufweist. Der Mittenbereich 6 erstreckt sich, bezogen auf die Drehachse D des Rollenrades 1, über einen Winkel von 10 bis 90°, vorzugsweise von 20 bis 60°, bezogen auf die Umschlingung des Rollenrades 1 durch den Schlauch 19. Der Andruckbügel 3 erstreckt sich, bezogen auf die Drehachse D, über einen Winkel von 90° bis 180°, vorzugsweise von 120° bis 170°.The pressure bar 4 has an inlet area 5, a central area 6 and an outlet area 7, wherein the pressure bar 3, at least in the outlet area 7, preferably also in the inlet area 5, has an enlarged cross-section compared to the central area 6. The center region 6 extends, with respect to the axis of rotation D of the roller wheel 1, over an angle of 10 to 90 °, preferably from 20 to 60 °, based on the looping of the roller wheel 1 through the hose 19. The pressure bar 3 extends, relative to the axis of rotation D, over an angle of 90 ° to 180 °, preferably from 120 ° to 170 °.

Der an einem Ende auf der Frontplatte 15 ortsfest angeordnete und auf der zur Drehachse D des Rollenrades 1 parallelen Schwenkachse 8 gelagerte Andruckbügel 3 ist an seinem anderen Ende mittels der Spannvorrichtung 9 zwischen einer Montagestellung I für den Schlauch 19 und einer Betriebsstellung II für den Schlauch 19 schwenkbar. Dazu weist die Spannvorrichtung 9 den am zweiten Ende des Andruckbügels 3 angeordneten Spannstift 10 und die um eine zur Drehachse D des Rollenrades 1 parallele Spanndrehachse S drehbare Verschlußplatte 13 mit einem Betätigungselement 11 auf. Beim Verschwenken der Verschlußplatte 13 von der Montagestellung I des Schlauches 19 (in Fig. 1 linke Schlauchpumpe 20), in die Betriebsstellung II (in Fig. 1 rechte Schlauchpumpe 21) wird der Spannstift 10 aus der einen Raste 26 der Spannscheibe 24 in deren andere Raste 27 bewegt, wobei die Spannscheibe 24 durch einen zwischen beiden Rasten 26,27 verlaufende bogenförmigen Schlitz 28 federelastisch ausgebildet ist. Dabei deckt der Verschlußdeckel 13 in der Betriebsstellung II das Rollenrad 1 sowie den eingelegten Schlauch 19 stirnseitig ab und fixiert so den Schlauch 19 in Richtung der Drehachse D des Rollenrades 1. Der Verschlußdeckel 13 ist in der Betriebsstellung II kraftschlüssig einrastbar. Das Rollenrad 1 und/oder der Andruckbügel 3 sind austauschbar.The at one end on the front panel 15 fixedly arranged and mounted on the axis of rotation D of the roller wheel 1 parallel pivot axis 8 Andruckbügel 3 is at its other end by means of the clamping device 9 between a mounting position I for the hose 19 and an operating position II for the hose 19th pivotable. For this purpose, the clamping device 9 arranged on the second end of the Andruckbügels 3 clamping pin 10 and about a parallel to the axis of rotation D of the roller wheel 1 clamping axis S rotatable closure plate 13 with an actuating element 11. When pivoting the closure plate 13 of the mounting position I of the hose 19 (in Fig. 1 left peristaltic pump 20), in the operating position II (in Fig. 1 right peristaltic pump 21) of the clamping pin 10 from one catch 26 of the clamping plate 24 in the other Notch 27 moves, wherein the clamping disk 24 is formed by a running between two notches 26,27 arcuate slot 28 resilient. Here, the cap 13 covers in the operating position II, the roller wheel 1 and the inserted tube 19 from the front and thus fixes the hose 19 in the direction of the axis of rotation D of the roller wheel 1. The cap 13 is frictionally engaged in the operating position II. The roller wheel 1 and / or the pressure bar 3 are interchangeable.

In der Fig. 1 sind zur Schlauchpumpe 20 der Radius R1 als Rollradius der Außenseite einer jeden Rolle 2 bezogen auf die Drehachse D des Rollenrades 1 und der Radius R2 als der Abstand der Stützfläche 4 von der Mittenachse D des Rollenrades 1 definiert. Das Rollenrad 1 und/oder der Andruckbügel 3 sind hinsichtlich der Radiendifferenz R2-R1 mit der Maßgabe auswählbar, daß in der Montagestellung I ein vorgegebener Schlauch 19 mit einem Außendurchmesser kleiner als R2-R1 einlegbar ist. Das Rollenrad 1 und/oder der Andruckbügel 3 sind hinsichtlich der Radiendifferenz R2-R1 mit der Maßgabe auswählbar, daß ein vorgegebener Schlauch mit einer Wandungsstärke von < R2-R1/2 einsetzbar ist.In FIG. 1, for the peristaltic pump 20, the radius R1 as the rolling radius of the outside of each roller 2 with respect to the rotation axis D of the roller wheel 1 and the radius R2 as the distance of the support surface 4 defined by the center axis D of the roller wheel 1. The roller wheel 1 and / or the pressure bar 3 can be selected with regard to the radius difference R2-R1 with the proviso that in the mounting position I a predetermined tube 19 with an outside diameter smaller than R2-R1 can be inserted. The roller wheel 1 and / or the pressure bar 3 can be selected with regard to the radius difference R2-R1 with the proviso that a predetermined tube with a wall thickness of <R2-R1 / 2 can be used.

Die dargestellten peristaltischen Schlauchpumpen 20,21 bilden eine Arthroskopiepumpe, bei welche die in Fig. 1 links dargestellte Schlauchpumpe 20 die Saugseite und die in Fig. 1 rechts dargestellte Schlauchpumpe 21 die Spülseite bilden. Die Schlauchpumpe 20 der Saugseite dreht im Uhrzeigersinn. Die Schlauchpumpe 21 der Spülseite dreht im Gegenuhrzeigersinn. Beiden Schlauchpumpen 20,21 sind Halter 22 für den Schlauch 19 zugeordnet. In den Haltern 22 sind Drucksensoren angeordnet. Zwischen den beiden Schlauchpumpen 20,21 umfaßt die Frontplatte 15 ein Fenster 23 für ein Display zur Anzeige der Werte von Druck, Durchflußmenge u.dgl. der Arthroskopiepumpe.The illustrated peristaltic peristaltic pumps 20, 21 form an arthroscopy pump, in which the hose pump 20 shown on the left in FIG. 1 forms the suction side and the peristaltic pump 21 shown on the right in FIG. 1 forms the flushing side. The suction side hose pump 20 rotates clockwise. The hose pump 21 of the purge side turns counterclockwise. Two peristaltic pumps 20, 21 are assigned holders 22 for the hose 19. In the holders 22 pressure sensors are arranged. Between the two peristaltic pumps 20, 21, the front panel 15 includes a window 23 for a display for displaying the values of pressure, flow rate and the like. the arthroscopy pump.

In einer alternativen Ausführungsform weist der Andruckbügel 3 zumindest im Mittenbereich 6 eine schlitzförmige Ausnehmung auf, die entlang einer Kreisbahn un die Drehachse D des Rollenrades 1 verläuft.In an alternative embodiment, the pressure bar 3, at least in the middle region 6, has a slot-shaped recess which extends along a circular path and the axis of rotation D of the roller wheel 1.

Claims (14)

  1. A peristaltic hose pump comprising a roller wheel (1) rotatable about an axis of rotation D of the roller wheel, rollers (2) mounted on said roller wheel (1), said rollers (2) rolling on a circular path having the radius R1 relative to said axis of rotation D of the roller wheel, and comprising a pressing bracket (3) having a supporting surface (4), said supporting surface (4) extending in a circular path having the radius R2 around said axis of rotation D of the roller wheel (1), and between said supporting surface (4) and said rollers (2) of said roller wheel (1) a flexible hose (19) being insertable,
    characterized by
    that said supporting surface (4) is made from an elastically deformable plastic material, and
    that said pressing bracket (3) is preformed such that the shape of said supporting surface (4) in the released condition of said pressing bracket (3), which corresponds to a mounting position of said pressing bracket (3), in which said hose (19) is insertable, substantially corresponds to the shape of said supporting surface (4) in the tightened condition, which corresponds to an operating position, in which said supporting surface (4) is moved relative to said mounting position in the direction towards said axis of rotation D of the roller wheel, said hose (19) being clamped between said rollers (2) and said supporting surface (4).
  2. A peristaltic hose pump according to claim 1, characterized by that said pressing bracket (3) is made from said elastically deformable plastic material.
  3. A peristaltic hose pump according to claim 1 or 2, characterized by that said plastic material is polyoxymethylene (POM).
  4. A peristaltic hose pump according to one of claims 1 to 3, characterized by that said plastic material has a modulus of elasticity in tension of ≥ 1,000 MPa, preferably ≥ 3,000 MPa (megapascal), a bending fatigue strength ≥ 10 MPa, preferably ≥ 30 MPa and an impact strength at ambient temperature of 23 °C of ≥ 70 KJ/m2, preferably ≥ 130 KJ/m2 (kilojoule per square meter).
  5. A peristaltic hose pump according to one of claims 1 to 4, characterized by that said pressing bracket (3) has an entry section (5), a central section (6) and an exit section (7), wherein at least said exit section (7), preferably also said entry section (5), has a larger cross section compared to said central section (6), preferably a larger thickness in the directions orthogonal to said supporting surface.
  6. A peristaltic hose pump according to one of claims 1 to 5, characterized by that said central section (6), relative to said axis of rotation D of the roller wheel, extends over an angle from 10° to 90°, preferably from 20° to 60°.
  7. A peristaltic hose pump according to one of claims 1 to 6, characterized by that said pressing bracket (3), relative to said axis of rotation D of the roller, extends over an angle from 90° to 180°, preferably from 120° to 170°.
  8. A peristaltic hose pump according to one of claims 1 to 7, characterized by that said pressing bracket (3) is supported at a first end on a rocking shaft (8) provided stationarily at the hose pump (20, 21) and parallely to said axis of rotation (D) of said roller wheel (1), and is rotatable at its second end by means of a tensioning device (9) between a hose mounting position and an operating position.
  9. A peristaltic hose pump according to one of claims 1 to 8, characterized by that said tensioning device (9) comprises a roll pin (10) provided at the second end of said pressing bracket and a closure plate (13) rotatable about a tensioning axis of rotation S being parallel to said axis of rotation (D) of said roller wheel (1), said closure plate (13) interacting with said roll pin (10) such that, when said closure plate (13) is rotated from said hose mounting position (I) into said operating position (II), said roll pin (10) is pressed out of a first notch (26) into a second notch (27) of a tensioning disk (24).
  10. A peristaltic hose pump according to one of claims 1 to 9, characterized by that in said operating position (II), said closure plate (13) covers said roller wheel (1) and said hose (19) inserted therein at the front and thus preferably fixes said hose (19) in the direction of said axis of rotation (D) of said roller wheel (1).
  11. A peristaltic hose pump according to one of claims 1 to 10, characterized by that in said operating position (II), said closure plate (13) is engageable by frictional action.
  12. A peristaltic hose pump according to one of claims 1 to 11, characterized by that said roller wheel (1) and/or said pressing bracket (3) are exchangeable.
  13. A peristaltic hose pump according to one of claims 1 to 12, characterized by that said roller wheel (1) and/or said pressing bracket (3) can be selected with regard to the radius difference R2 - R1 such that in said mounting position (I), a given hose (19) having an outer diameter smaller than R2 - R1 is insertable.
  14. A peristaltic hose pump according to one of claims 1 to 13, characterized by that said roller wheel (1) and/or said pressing bracket (3) can be selected with respect to the radius difference R2 - R1 such that a given hose (19) having a wall thickness lower than (R2-R1)/2 can be used.
EP01995604A 2000-12-12 2001-12-10 Peristaltic hose pump Expired - Lifetime EP1342011B1 (en)

Applications Claiming Priority (3)

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DE10062600A DE10062600C2 (en) 2000-12-12 2000-12-12 Peristaltic peristaltic pump
DE10062600 2000-12-12
PCT/DE2001/004725 WO2002048549A1 (en) 2000-12-12 2001-12-10 Peristaltic hose pump

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EP1342011A1 EP1342011A1 (en) 2003-09-10
EP1342011B1 true EP1342011B1 (en) 2006-10-11

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EP (1) EP1342011B1 (en)
AT (1) ATE342443T1 (en)
AU (1) AU2002226297A1 (en)
DE (2) DE10062600C2 (en)
WO (1) WO2002048549A1 (en)

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US20040037724A1 (en) 2004-02-26
DE50111227D1 (en) 2006-11-23
DE10062600A1 (en) 2002-06-20
ATE342443T1 (en) 2006-11-15
US7287968B2 (en) 2007-10-30
AU2002226297A1 (en) 2002-06-24
WO2002048549A1 (en) 2002-06-20
DE10062600C2 (en) 2002-12-05
EP1342011A1 (en) 2003-09-10

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