EP1664535B1 - Peristaltic pump - Google Patents

Peristaltic pump Download PDF

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Publication number
EP1664535B1
EP1664535B1 EP04734653A EP04734653A EP1664535B1 EP 1664535 B1 EP1664535 B1 EP 1664535B1 EP 04734653 A EP04734653 A EP 04734653A EP 04734653 A EP04734653 A EP 04734653A EP 1664535 B1 EP1664535 B1 EP 1664535B1
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EP
European Patent Office
Prior art keywords
tube
hose
bed
peristaltic pump
bed unit
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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EP04734653A
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German (de)
French (fr)
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EP1664535A1 (en
Inventor
Markus Firmann
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Innolab GmbH
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Innolab GmbH
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Publication date
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Publication of EP1664535A1 publication Critical patent/EP1664535A1/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
    • 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 invention relates to a peristaltic pump according to the preamble of claim 1.
  • Peristaltic pumps consist essentially of a hose bed as a support for the hose and at least one element that squeezes the hose in a partial area.
  • the pumping action is created by moving the squeeze element longitudinally relative to the tube.
  • squeezing elements ram, fingers or rollers on a rotor are known.
  • the performance of peristaltic pumps is mainly determined by the design of the pump, the dimensions of the tubing, the tubing, the fluid being pumped and the conditions of use. Decisive for the pumping action and the service life of the hoses are the dynamic elastic properties, the creep and bending fatigue strength as well as the compression and tension set of the hose material.
  • the tubing fatigues due to the repeated bruising, so that the tube cross-section and thus the tube volume in the pinch area deviates more and more from the initial state over time.
  • the rollers exert a tensile force on the hose, which increasingly stretches it in the longitudinal direction, so that in the pinch region of the Reduce tubing cross-section and tubing volume over time.
  • peristaltic pumps aims to produce flow rates that are predictable, reproducible and consistent within narrow limits under the same conditions of use with a particular type of pump and tubing.
  • Pumps for hose meter goods therefore usually have on both sides of the tubular bed, for example, as terminals running holding devices for the hose. If the hose bed is designed as a hose cassette separable from the pump, then this often has lateral recesses for receiving stoppers permanently connected to the hose. Such holding devices prevent the tube from shifting in the pump, but not from stretching in the crimping area due to the tensile force exerted on the rollers in the longitudinal direction.
  • the hose has the document which is regarded as the closest prior art WO 01/23277 (D1 ) a perforated longitudinal rib on which is inserted in two glued together halves of a cassette.
  • the cassette includes the tubing, the Schlaubett and a dosing unit for the liquid to be delivered.
  • the delivery rate should be quickly and continuously variable and should allow a promotion between 20 cc / hour and more than 1500 ccm / minute. In this way, the hose is sufficiently firmly held in the cassette which can be exchanged with the dosing unit.
  • a constant delivery rate is not necessary and is not desired.
  • the assembly of the cassette is relatively complex, as well as the production of the tube with the perforated longitudinal rib and difficult to perform especially for small tubes. Multi-channel pumps can also be realized only to a limited extent with such a construction.
  • the reproducibility of the hose preload in hose cartridges is unfavorably influenced by the following shortcomings: First, the stoppers are usually of different sizes depending on the hose dimension, so that their position in the recesses of the hose cartridges designed for the largest stoppers is often not sufficiently precisely defined. Secondly, the hoses can be inserted twisted around their longitudinal axis into the hose cassette. Third, the predetermined distance between the stoppers often can not be maintained with sufficient reproducibility using today's manufacturing techniques, and fourthly, the various tube materials and dimensions would require optimized preload with a specific stopper spacing, which is neglected in favor of standardized manufacturing.
  • hose cassettes can be equipped with new hoses several times and reused, their properties can change over time due to fatigue, defect or influence of chemicals, whereby the reproducibility and constancy of the flow rates generated are additionally adversely affected. There is also the danger that the tube not fixed in the tube bed can be pinched and damaged by incorrect operation when placing the tube cassette on the pump.
  • a hose-tubing unit 1 in a bottom view, top view, top view and cross-section embodiment of a hose-tubing unit 1 consists of an injection-molded hose bed 2 and a fixed contact surface 4 in a pinch area 5 and not separable connected to the hose bed 2 hose 3.
  • the hose -Schlauchbett unit 1 has as a fastening means recesses 6, 6 ', which are matched to corresponding cams as Haltevorrich tion on the pump.
  • Further features of this embodiment are handles 18, 18 'and extensions of the tubular bed 2, which are formed as a hose clamp areas 8, 8', and a labeling area 7.
  • the labeling area 7 provides space for information about the pumped medium, the date of commissioning or other for Quality assurance and traceability important information.
  • the in the FIGS. 2A to 2C Embodiment shown in the bottom view, top view and top view of the hose-tubing unit 1 consists of a made of strip material hose bed 2 and a fixed contact surface 4 in the squish area 5 and not separable with the Hose tube 2 connected hose 3.
  • the hose-tubing unit 1 has, for example, as recesses on recesses 6, 6 ', which are matched to the corresponding holding devices on the pump. Further features of this embodiment are continuations of the tubular bed 2, which are formed as a hose clamp areas 8, 8 ', and a labeling area 7.
  • the advantage of a tubular bed 2 made of strip material is mainly that adapted for different rotor sizes, specific lengths of the Schlauch-Schlauchbett- Unit 1 can be produced inexpensively even in small batches.
  • the strip material for the tube bed 2 is preferably to be chosen so that this has sufficient tensile strength in the longitudinal direction and at the same time the lowest possible bending stress in the looping of the rotor.
  • the recesses 6, 6 'serving as fastening means, for example, and the hose clamp regions 8, 8' of hose-hose-bed units 1 made of strip material are preferably produced by punching.
  • FIGS. 3 to 9 show the cross sections of various embodiments of the hose-tubing unit 1 in the squish area 5. All variants have in common that first the tube bed 2 at least in the pinch area 5 fixed and not separable connected to the tube 3 and secondly the material and / or the cross section of Tubular bed 2 are suitable to reduce the extensibility of the hose-tubing unit 1 in the longitudinal direction in the squish area 5 so that it is less compared to the tube 3 alone. Analogously, all embodiments having these features are also within the scope of the invention, which by combination or modification of the in Fig. 3 - 9 illustrated embodiments resulting.
  • the hose-tubing unit 1 is preferably manufactured by the hose bed 2 and the hose 3 are manufactured individually and then firmly and non-separably connected, for example by gluing or welding ( Fig. 3 - 6 ) or with a combined hard / soft injection molding or extrusion process, in which the composite takes place during production (FIGS. 7, 8)
  • Fig. 3 shows the cross section of an embodiment of the hose-tubing unit 1, consisting of an example concave curved hose bed 2 and a hose 3 with tangential contact surface 4, which is glued or welded to the hose bed 2, for example.
  • the concave curvature of the hose bed 2 and contact surface 4 centers the hose 3 in the middle of the hose bed 2 and prevents lateral tilting during the squeezing process.
  • An advantage of this embodiment is further that the contact surface 4 is made of the same elastomeric material as the hose 3, this acts as a spring and thereby can compensate for tolerances in crushing and in the contact force in a certain range.
  • Fig. 4 shows the cross section of an embodiment of the hose-tubing unit 1, in which a longitudinal rib 20 of the tube 3 is glued or welded in a corresponding recess of the tubular bed 2.
  • Fig. 5 shows the cross section of an embodiment of the hose-tubing unit 1, in which the hose 3 has a non-circular cross-sectional area inside and outside. It is common to all embodiments of the hose-tubing unit 1 according to the invention that the solid, non-separable connection of the tubing 2 with the tube 3 uniquely determines the torsion position of the tube 3 in the longitudinal axis.
  • the shape of the cross-sectional area of the tube 3 inside and outside can basically be chosen freely and optimized, for example, for a long life or for gentle pumping.
  • Fig. 6 shows the cross section of an embodiment of the hose-tubing unit, in which the hose bed 2 has flexible extensions 21, 21 'as a receptacle for the hose 3.
  • the extensions 21, 21 ' are connected to the tube 3, for example, by gluing or welding firmly and not separable.
  • This embodiment has the advantage that already existing tube-piece goods with a circular inner and outer cross-section can be used.
  • Fig. 7 shows the cross section of an embodiment of the hose-tubing unit 1, in which the tube bed 2 and the tube 3 are co-extruded as a hard / soft composite.
  • the extruded fabric is cut, shortened the hose bed 2 to the necessary length and provided with suitable fasteners.
  • Fig. 8 shows the cross section of an embodiment of the hose-tubing unit 1, in which the hose bed 2 reinforcing elements 22 such as films, tapes, filaments or fibers, which are suitable to reduce the extensibility of the hose-tubing unit 1 in the longitudinal direction, that this is less in comparison to the tube 3 alone.
  • the production of this embodiment is preferably carried out by the reinforcing elements 22 are fed to the tube bed 2 during the extrusion as an afterthought.
  • the extruded fabric is cut, shortened the hose bed 2 to the necessary length and provided with suitable fasteners.
  • Fig. 9 shows the cross section of an embodiment of the hose-tubing unit 1, in which the hose bed 2 and the hose 3 are made of the same material and no additional, reinforcing element 22 included.
  • This embodiment allows only a substantial reduction in the extensibility of the tube 3 in the longitudinal direction, when the cross section of the tubular bed 2 is greater than the material cross-section of the tube.
  • Fig. 10 - 13 show various embodiments of formed as a hose clamp portion 8 extensions of the tubular bed 2 of the hose-tubing unit 1. All embodiments are common two legs 10, 10 'which form a parallel slot 9, for example, which is at least as long as half the circumference of the inner cross-section and less wide than twice the wall thickness of the largest hose to be squeezed 3.
  • Fig. 10 A, B shows the already in Fig. 2 illustrated embodiment of a hose clamp portion 8 with pinched in the slot 9 and squeezed hose 3 in top view and side view.
  • the distance between the inner flanks the leg 10, 10 'of the hose clamp portion 8 decreases continuously from the outside and merges into a preferably constant width of the slot 9. This favors a simple and effortless introduction of the tube 3 from the outside into the slot 9, as far as the tube 3 is squeezed to the desired extent and the flow of medium is partially or completely prevented.
  • Fig. 11 shows in top view a closed, lockable embodiment of a hose clamp portion 8 with a leg 10 ', which has an extension 11 which engages in a matching opening on the opposite leg 10, thereby preventing the two legs 10, 10' by the pressure of the clamped tube 3 can open over time.
  • a lockable embodiment is particularly suitable for hard hose materials or if the hose 3 must remain securely squeezed for a long time.
  • the hose clamp area 8 is opened by moving one of the legs 10, 10 'out of the common plane, causing the extension 11 to spring out of the opening in leg 10.
  • Fig. 12 shows in top view another closed, lockable embodiment of a hose clamp portion 8 with two legs 10, 10 ', which can be overlapped into each other, thereby preventing the two legs 10, 10' by the pressure of the clamped hose 3 with time can open.
  • Fig. 13 shows in top view another closed, lockable embodiment of a hose clamp area 8, in which the legs 10, 10 'have an interlocking, self-locking toothing 12.
  • the width of the slot 9 can thereby be gradually reduced by pressure on the outside of the legs 10, 10 'until the tube 3 is squeezed to the desired extent and the flow of medium is partially or completely prevented.
  • the hose clamp portion 8 is opened by one of the legs 10, 10 'is moved out of the common plane, whereby the teeth 12 dissolves.
  • Fig. 14 shows the off Fig. 1 Known hose-tubing unit 1 with an injection-molded hose bed 2 together with holding devices 15, 15a and the rollers 13 of a rotor 14 as squeezing in plan view. Analogously, the following explanations also apply to hose-hose bed units 1 with a hose bed 2 made of strip material according to Fig. 2 ,
  • a hose-tubing unit 1 takes place at the pump by on both sides of the hose 3 in a slot 16 of a holding device 15, 15 a inserted and the pressure on the hose-bed unit 1 on the inside of the handles 18 and 18 'is increased until cams 17 and 17a of the holding device 15, 15a engage in the serving as fastening means recesses 6, 6 'of the tubular bed 2.
  • the hose-tubing unit 1 is fixed relative to the rollers 13 in an unambiguous position, whereby a defined and reproducible contact force on the tube 3 sets.
  • the hose-tubing unit 1 can be disconnected from the pump by simultaneously pressing on the outside of the handles 18 and 18 ', the recesses 6, 6' of the tubing 2 serving as fastening means, of the cams 17, 17a of the holders 15, 15a are lifted, and thereby the connection of the hose-tubing unit 1 to the holding device 15, 15a is released.
  • Out Fig. 14 It can be seen that the preferred embodiment of the holding device 15, 15a allows the simultaneous attachment of two opposing hose-bag assemblies 1 and 1a.
  • hose-tubing unit 1a with recesses 19a, 19a 'on the cam 17', 17a 'of the holding device 15, 15a shown.
  • the hose-tubing unit 1a is attached to the pump, the However, hose 3a is largely relieved of the pressure of the rollers 13.
  • the elastomeric properties of the tube 3a can be obtained with a longer standstill of the pump, without the hose-tubing unit 1a must be completely separated from the pump. It goes without saying that with a hose-tubing unit 1 which several, at best, finer recesses of the type 6, 6 'and 19, 19', the contact pressure is gradually adjustable.
  • the contact pressure of the hose-tubing unit 1 can be adjusted to the squeezing according to the pressure to be generated.
  • the means for a graded or continuous adjustment of the contact pressure on the hose-tubing unit 1 or on the holding device are attached to the pump, as well as whether this directly or indirectly via levers, wedges , Screws or other adjusting elements act.
  • Fig. 15 shows the holding device 15 in side view.
  • Fig. 16 shows the already of Fig. 1 known hose-hose bed unit 1 with a spring-mounted holding device 15, 15a and the rollers 13 of a rotor 14 as squeezing in plan view.
  • Springs 23, 23a have cams 24, 24a, which are matched to the recesses 6, 6 'of the tubular bed 2.
  • the spring 23a sets the hose-tubing unit 1 under a certain tensile stress, which causes a corresponding pressing force of the hose-tubing unit 1 to the rollers 13 of the rotor 14.
  • the holding device 15, 15a can have one or both sides springs, which can also be designed to be interchangeable for different contact pressure. As already in Fig.
  • the hose-tubing unit 1a is also shown here relieved of the contact pressure by the cam 24 of the spring 23 in the recess 19a and the cam 17a 'of the holding device 15a engages in the recess 19a'.
  • a sprung holding device 15a for example, the pressure occurring in the hose 3 can be reliably limited.
  • the resilient element is designed as part of the holding device 15a or as part of the hose-tubing unit 1 or indirectly via further elements to the hose-tubing unit 1 acts.
  • each new hose-bed unit 1 each not only from a new hose 3 but always from a new hose bed 2. This ensures regardless of the embodiment always reproducible starting conditions.
  • hose-tubing unit 1 is described here preferably in connection with pumps which have a rotor and rollers as crimping elements, it is not bound to a specific type, design or dimension of crimping elements and can also be used, for example, with fingers or plungers. Pumps are used.
  • a variety of geometric shapes such as eyelets, bumps, grooves, extensions or recesses of various numbers and combination with matched elements on the Pump
  • hooks, bolts, buckles or clamps can be selected according to the requirement and hose-tubing units 1 with other than those mentioned here or additional, indirect fasteners such as brackets or cassettes fall under the spirit of the invention.
  • a single holding device is sufficient to press the hose-bed unit 1 onto the squeezing elements.
  • Embodiments of peristaltic pumps in which the hose-tubing unit 1 are connected to one or more than two holding devices are thus also according to the invention.

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

Abstract

The invention relates to a peristaltic pump comprising a tube-tube bed unit ( 1 ) which is connected in a rigid manner to the tube ( 3 ) in the pressed region ( 5 ) and which can not be separated from the tube bed ( 2 ). The tube-tube bed unit ( 1 ) comprises features or means ( 6, 6' ) which enable the pump to be fixed in a simple, precise and reproducible manner in relation to the rotor. In the pressed region ( 5 ), the tube ( 3 ) can be effectively prevented from being displaced or stretched corresponding to the decrease in the cross-section due to the tube-tube bed unit (1) and twisting of the tube ( 3 ) around the longitudinal axis is impossible in principle. The tube-tube bed unit ( 1 ) comprises a marking area, integrated tube clamping areas and grips ( 18, 18' ). Preferably, the tube-tube bed unit ( 1 ) is produced by firmly and non-detachably connecting a tube bed ( 2 ), produced according to the inventive method, to a tube, which has a contact surface ( 4 ) which is adjusted to the tube bed (2), by means of adhesive or welding or by coextruding the tube ( 3 ) and the tube bed ( 2 ).

Description

Die Erfindung betrifft eine Peristaltikpumpe gemäss dem Oberbegriff des Patentanspruches 1.The invention relates to a peristaltic pump according to the preamble of claim 1.

Peristaltikpumpen bestehen im Wesentlichen aus einem Schlauchbett als Auflage für den Schlauch und mindestens einem Element, das den Schlauch in einem Teilbereich quetscht. Die Pumpwirkung wird erzeugt indem das Quetschelement relativ zum Schlauch in Längsrichtung bewegt wird. Als Quetschelemente sind Stössel, Finger oder Rollen auf einem Rotor bekannt. Die Leistung von Peristaltikpumpen wird hauptsächlich von der konstruktiven Ausführung der Pumpe, von der Schlauchdimension, vom Schlauchmaterial sowie vom gepumpten Medium und den Anwendungsbedingungen bestimmt. Entscheidend für die Pumpwirkung und die Lebensdauer der Schläuche sind die dynamischelastischen Eigenschaften, die Kriech- und Biegewechselfestigkeit sowie der Druck- und Zugverformungsrest des Schlauchmaterials. Diese Eigenschaften sind ihrerseits abhängig vom gepumpten Medium, von spezifischen Anwendungsbedingungen wie Temperatur und Druck, sowie vom Gebrauchsalter der Schläuche, d.h. der Anzahl und Dynamik der bereits erfolgten Quetschvorgänge in einem bestimmten Zeitraum. Aufgrund der Vielzahl von teils zeitabhängigen Einflussfaktoren ist es sehr schwierig, mit Peristaltikpumpen konstante Fliessraten zu erzeugen. In der Praxis nehmen diese mit der Zeit meist ab, wobei der zeitliche Verlauf und das Ausmass der Drift anwendungsspezifisch sind und im Allgemeinen nicht vorausgesagt werden können. Auch unter idealen Bedingungen kann daher mit bekannten Peristaltikpumpen und Schlauchmaterialien nur über Minuten bis Stunden eine konstante Fliessrate erzeugt werden. Zwei hauptsächliche Effekte sind für die Drift der Fliessrate verantwortlich. Einerseits ermüdet das Schlauchmaterial durch die wiederholten Quetschungen, so dass der Schlauchquerschnitt und damit das Schlauchvolumen im Quetschbereich mit der Zeit immer stärker vom Ausgangszustand abweicht. Andererseits üben, vor allem bei Pumpen mit Rotor, die Rollen eine Zugkraft auf den Schlauch aus, welche diesen zunehmend in Längsrichtung dehnt, so dass sich im Quetschbereich der Schlauchquerschnitt und das Schlauchvolumen mit der Zeit verringern. Je grösser dabei die Anpresskraft der Rollen auf den Schlauch ist, desto grösser ist meist auch die auf den Schlauch wirkende Zugkraft und die sich dadurch einstellende Schlauchdehnung.Peristaltic pumps consist essentially of a hose bed as a support for the hose and at least one element that squeezes the hose in a partial area. The pumping action is created by moving the squeeze element longitudinally relative to the tube. As squeezing elements ram, fingers or rollers on a rotor are known. The performance of peristaltic pumps is mainly determined by the design of the pump, the dimensions of the tubing, the tubing, the fluid being pumped and the conditions of use. Decisive for the pumping action and the service life of the hoses are the dynamic elastic properties, the creep and bending fatigue strength as well as the compression and tension set of the hose material. These properties depend in turn on the medium being pumped, on specific conditions of use, such as temperature and pressure, and on the age of use of the hoses, ie the number and dynamics of squeezing operations that have already taken place over a certain period of time. Due to the large number of factors, some of which are time-dependent, it is very difficult to produce constant flow rates with peristaltic pumps. In practice, these tend to decrease over time, with the timing and extent of the drift being application specific and generally unpredictable. Even under ideal conditions, a constant flow rate can therefore only be generated with known peristaltic pumps and tubing over minutes to hours. Two main effects are responsible for the drift of the flow rate. On the one hand, the tubing fatigues due to the repeated bruising, so that the tube cross-section and thus the tube volume in the pinch area deviates more and more from the initial state over time. On the other hand, especially in pumps with rotor, the rollers exert a tensile force on the hose, which increasingly stretches it in the longitudinal direction, so that in the pinch region of the Reduce tubing cross-section and tubing volume over time. The greater the contact force of the rollers on the hose, the greater is usually also the pulling force acting on the hose and the resulting tube elongation.

Allgemein zielt die Konstruktion von Peristaltikpumpen darauf ab, mit einer bestimmten Bauart von Pumpe und einem bestimmten Schlauch Fliessraten zu erzeugen, die unter gleichen Anwendungsbedingungen in engen Grenzen vorhersagbar, reproduzierbar und konstant sind.Generally, the design of peristaltic pumps aims to produce flow rates that are predictable, reproducible and consistent within narrow limits under the same conditions of use with a particular type of pump and tubing.

Vor allem bei Pumpen mit Rotor muss dabei verhindert werden, dass sich der Schlauch im Quetschbereich durch die auf ihn ausgeübte Zugkraft der Rollen in Längsrichtung verschiebt. Pumpen für Schlauch-Meterware weisen daher meist auf beiden Seiten des Schlauchbetts beispielsweise als Klemmen ausgeführte Haltevorrichtungen für den Schlauch auf. Ist das Schlauchbett als von der Pumpe trennbare Schlauchkassette ausgeführt, so weist diese oft seitliche Aussparungen für die Aufnahme von fest mit dem Schlauch verbundenen Stoppern auf. Solche Haltevorrichtungen verhindern, dass sich der Schlauch in der Pumpe verschiebt, nicht jedoch, dass er sich im Quetschbereich durch die auf ihn ausgeübte Zugkraft der Rollen in Längsrichtung dehnt.Especially with pumps with rotor must be prevented that the hose moves in the squish area by the force exerted on him pulling force of the rollers in the longitudinal direction. Pumps for hose meter goods therefore usually have on both sides of the tubular bed, for example, as terminals running holding devices for the hose. If the hose bed is designed as a hose cassette separable from the pump, then this often has lateral recesses for receiving stoppers permanently connected to the hose. Such holding devices prevent the tube from shifting in the pump, but not from stretching in the crimping area due to the tensile force exerted on the rollers in the longitudinal direction.

Um dies zu verhindern, weist der Schlauch in der als nächstliegender Stand der Technik angesehenen Druckschrift WO 01/23277 (D1 ) eine gelochte Längsrippe auf die in zwei mit einander verklebten Hälften einer Kassette eingelegt ist. Die Kassette umfasst den Schlauch, das Schlaubett und eine Dosiereinheit für die zu fördernde Flüssigkeit. Zweck der Anordnung ist es, für den medizinischen Einsatz geeignete Kassetten zur Verfügung zu stellen, wobei die Förderrate schnell und stufenlos veränderbar sein soll und eine Förderung zwischen 20 ccm/Stunde und mehr als 1500 ccm/Minute erlauben soll. Auf diese Weise wird der Schlauch in der mit der Dosiereinheit zusammen auswechselbaren Kassette genügend fest gehaltert. Eine konstante Förderrate ist jedoch nicht notwendig und wird nicht angestrebt. Die Montage der Kassette ist vergleichsweise aufwändig, ebenso die Herstellung des Schlauchs mit der gelochten Längsrippe und insbesondere bei kleinen Schläuchen schwierig durchzuführen. Mehrkanalige Pumpen können zudem mit einer solchen Konstruktion nur bedingt realisiert werden.In order to prevent this, the hose has the document which is regarded as the closest prior art WO 01/23277 (D1 ) a perforated longitudinal rib on which is inserted in two glued together halves of a cassette. The cassette includes the tubing, the Schlaubett and a dosing unit for the liquid to be delivered. Purpose of the arrangement is to provide suitable for medical use cartridges, the delivery rate should be quickly and continuously variable and should allow a promotion between 20 cc / hour and more than 1500 ccm / minute. In this way, the hose is sufficiently firmly held in the cassette which can be exchanged with the dosing unit. However, a constant delivery rate is not necessary and is not desired. The assembly of the cassette is relatively complex, as well as the production of the tube with the perforated longitudinal rib and difficult to perform especially for small tubes. Multi-channel pumps can also be realized only to a limited extent with such a construction.

In US 4,494,285 (D2 ) ist ein Verfahren zur Herstellung eines elastischen Lumens beschrieben, welches direkt an ein Schlauchbett gespritzt wird. Die Dehnung des Lumens in Längsrichtung wird so verhindert. Einer breiten Verwendung dieser Lösung steht jedoch entgegen, dass das Herstellverfahren aufwändig ist und beispielsweise kleine Lumina oder mehrkanalige Ausführungen nur eingeschränkt möglich sind. Für die Montage des Lumens muss zudem die gesamte Pumpeinheit mit Rotor demontiert werden.In US 4,494,285 (D2 ) describes a method for producing an elastic lumen, which is injected directly onto a tube bed. The elongation of the lumen in the longitudinal direction is thus prevented. However, a broad use of this solution is opposed by the fact that the manufacturing process is complicated and, for example, small lumens or multi-channel Designs are limited. For the assembly of the lumen also the entire pump unit with rotor must be disassembled.

Trotz ihrer spezifischen Vorteile werden die in D1, D2 beschriebenen Lösungen in der Praxis kaum verwendet, da sie den heutigen Ansprüchen an Einfachheit, Sicherheit sowie Flexibilität und schnellen Schlauchwechsel bei gleichzeitig geringen Herstellkosten nicht genügen.Despite their specific advantages, the solutions described in D1, D2 are hardly used in practice because they do not meet today's demands on simplicity, safety, flexibility and rapid tube change with low production costs.

Breite Verwendung finden Pumpen mit Schlauchkassetten für Schläuche mit Stoppern wie in EP 1 400 691 (D3 ) beschrieben, bei denen der Schlauch im Quetschbereich nicht fixiert ist. Bei dieser und ähnlichen Lösungen wird der Schlauch beim Einlegen in die Schlauchkassette und zusätzlich beim Aufsetzen der Schlauchkassette auf die Pumpe in Längsrichtung um etwa 10 - 30 % gedehnt. Diese Vorspannung kann die zusätzliche, durch die Zugkraft der Rollen hervorgerufene Längsdehnung des Schlauchs wohl etwas verringern, nicht aber verhindern, so dass mit zunehmender Längsdehnung der Schlauchquerschnitt und die Fliessrate abnehmen. Prinzipbedingt kann die Reproduzierbarkeit von mit Schlauchkassetten und Schläuchen mit Stoppern erzeugten Fliessraten daher nicht besser sein als die Reproduzierbarkeit der Schlauch-Vorspannung. Auch die Konstanz der Fliessrate ist bestenfalls so gut, wie der zeitliche Verlauf der Schlauchdehnung im Quetschbereich.Widely used are pumps with hose cassettes for hoses with stoppers as in EP 1 400 691 (D3 ), in which the hose is not fixed in the pinch area. In this and similar solutions, the tube is stretched by about 10 - 30% when inserted into the tube cassette and additionally when placing the tube cassette on the pump in the longitudinal direction. This bias can probably reduce the additional, caused by the tensile force of the rollers longitudinal expansion of the hose somewhat, but not prevent, so that decrease with increasing longitudinal expansion of the tube cross-section and the flow rate. Due to the principle, the reproducibility of flow rates generated with hose cassettes and hoses with stoppers can therefore not be better than the reproducibility of the hose preload. The constancy of the flow rate is at best as good as the time course of the tube expansion in the squish area.

Die Reproduzierbarkeit der Schlauch-Vorspannung in Schlauchkassetten wird durch folgende Unzulänglichkeiten ungünstig beeinflusst: Erstens sind die Stopper je nach Schlauchdimension meist verschieden gross, so dass deren Lage in den für die grössten Stopper ausgelegten Aussparungen der Schlauchkassetten oft nicht genügend genau definiert ist. Zweitens können die Schläuche um ihre Längsachse verdreht in die Schlauchkassette eingelegt werden. Drittens kann der vorgegebene Abstand zwischen den Stoppern mit den heutigen Herstellverfahren oft nicht genügend reproduzierbar eingehalten werden und viertens würden die verschiedenen Schlauchmaterialien und -dimensionen eine optimierte Vorspannung mit einem spezifischen Stopperabstand erfordern, was zugunsten einer standardisierten Herstellung meist vernachlässigt wird. Da Schlauchkassetten zudem mehrfach mit neuen Schläuchen bestückt und wieder verwendet werden, können sich deren Eigenschaften mit der Zeit durch Ermüdung, Defekt oder Einfluss von Chemikalien verändern, wodurch die Reproduzierbarkeit und die Konstanz der erzeugten Fliessraten zusätzlich ungünstig beeinflusst werden. Weiter besteht die Gefahr, dass der im Schlauchbett nicht fixierte Schlauch durch Fehlbedienung beim Aufsetzen der Schlauchkassette auf die Pumpe eingeklemmt und beschädigt werden kann.The reproducibility of the hose preload in hose cartridges is unfavorably influenced by the following shortcomings: First, the stoppers are usually of different sizes depending on the hose dimension, so that their position in the recesses of the hose cartridges designed for the largest stoppers is often not sufficiently precisely defined. Secondly, the hoses can be inserted twisted around their longitudinal axis into the hose cassette. Third, the predetermined distance between the stoppers often can not be maintained with sufficient reproducibility using today's manufacturing techniques, and fourthly, the various tube materials and dimensions would require optimized preload with a specific stopper spacing, which is neglected in favor of standardized manufacturing. There In addition, hose cassettes can be equipped with new hoses several times and reused, their properties can change over time due to fatigue, defect or influence of chemicals, whereby the reproducibility and constancy of the flow rates generated are additionally adversely affected. There is also the danger that the tube not fixed in the tube bed can be pinched and damaged by incorrect operation when placing the tube cassette on the pump.

Da die Reproduzierbarkeit und die Konstanz der mit bekannten Peristaltikpumpen erzeugten Fliessraten, speziell von solchen mit Schlauchkassetten als Schlauchbett und Rollen auf einem Rotor als Quetschelementen, für spezielle Anforderungen oft nicht genügt, muss die gewünschte Fliessrate durch Veränderung der Rotor-Drehzahl regelmässig wieder hergestellt werden. Nicht möglich ist dies bei Pumpen mit konstanter, nicht veränderbarer Drehzahl, sowie nur bedingt bei mehrkanaligen Pumpen mit gemeinsamem Antrieb für alle Kanäle. Zusammenfassend wird festgestellt, dass es mit Peristaltikpumpen heutiger Bauart, für spezielle Anforderungen nur eingeschränkt möglich ist, die erstrebenswerten Fliessraten mit der nötigen Reproduzierbarkeit und Konstanz zu erreichen.Since the reproducibility and the constancy of the flow rates generated by known peristaltic pumps, especially those with hose cassettes as a hose bed and rollers on a rotor as crimping elements, often not enough for special requirements, the desired flow rate must be restored regularly by changing the rotor speed. This is not possible for pumps with a constant, unchangeable speed, and only partially for multi-channel pumps with common drive for all channels. In summary, it is found that with peristaltic pumps of today's design, for special requirements is only possible to achieve the desirable flow rates with the necessary reproducibility and constancy.

Es ist Aufgabe der Erfindung, Peristaltikpumpen gemäss dem Oberbegriff des Patentanspruchs 1 derart zu verbessern, dass bei geringem baulichem und herstellungsmässigem Aufwand gleichzeitig eine einfache und sichere Handhabung sowie ein Höchstmass an Reproduzierbarkeit und Konstanz der Fliessrate erreicht wird.It is an object of the invention to improve peristaltic pumps according to the preamble of claim 1 such that at low construction and manufacturing effort at the same time a simple and safe handling and a maximum of reproducibility and constancy of the flow rate is achieved.

Die Lösung der Aufgabe ist wiedergegeben im kennzeichnenden Teil des Patentanspruches 1 hinsichtlich ihrer Hauptmerkmale, in den weiteren Patentansprüchen hinsichtlich weiterer vorteilhafter Ausbildungen.The solution of the problem is reflected in the characterizing part of claim 1 in terms of their main features, in the other claims in terms of further advantageous embodiments.

Die Erfindung wird näher erläutert anhand der beigefügten Zeichnungen. Es zeigen

Fig. 1A-D
Schlauch-Schlauchbett-Einheit mit im Spritzguss- verfahren hergestelltem Schlauchbett in Untenan- sicht, Draufsicht, Obenansicht und im Querschnitt,
Fig. 2A-C
Schlauch-Schlauchbett-Einheit mit Schlauchbett aus Bandmaterial in Untenansicht, Draufsicht und Oben- ansicht,
Fig. 3
Querschnitt eines ersten Ausführungsbeispiels der Schlauch-Schlauchbett-Einheit,
Fig. 4
Querschnitt eines zweiten Ausführungsbeispiels der Schlauch-Schlauchbett-Einheit,
Fig. 5
Querschnitt eines dritten Ausführungsbeispiels der Schlauch-Schlauchbett-Einheit,
Fig. 6
Querschnitt eines vierten Ausführungsbeispiels der Schlauch-Schlauchbett-Einheit,
Fig. 7
Querschnitt eines fünften Ausführungsbeispiels der Schlauch-Schlauchbett-Einheit,
Fig. 8
Querschnitt eines sechsten Ausführungsbeispiels der Schlauch-Schlauchbett-Einheit,
Fig. 9
Querschnitt eines siebten Ausführungsbeispiels der Schlauch-Schlauchbett-Einheit,
Fig. 10A-B ein
erstes Ausführungsbeispiel des Schlauchklem- menbereiches in Obenansicht und Seitenansicht,
Fig. 11
ein zweites Ausführungsbeispiel des Schlauchklem- menbereiches in Obenansicht,
Fig. 12
ein drittes Ausführungsbeispiel des Schlauchklem- menbereiches in Obenansicht,
Fig. 13
ein viertes Ausführungsbeispiel des Schlauchklem- menbereiches in Obenansicht,
Fig. 14
ein erstes Ausführungsbeispiel einer Schlauch- Schlauchbett-Einheit mit Haltevorrichtung und Ro- tor in Draufsicht,
Fig. 15
eine Haltevorrichtung des ersten Ausführungsbei- spiels in Seitenansicht,
Fig. 16
ein zweites Ausführungsbeispiel einer Schlauch- Schlauchbett-Einheit mit gefederter Haltevorrich- tung und Rotor in Draufsicht,
The invention will be explained in more detail with reference to the accompanying drawings. Show it
Fig. 1A-D
Hose-tubing unit with injection-molded tube bed in bottom view, top view, top view and in cross section,
Fig. 2A-C
Hose-tubing unit with tube bed made of strip material in bottom view, top view and top view,
Fig. 3
Cross section of a first embodiment of the hose-tubing unit,
Fig. 4
Cross section of a second embodiment of the hose-tubing unit,
Fig. 5
Cross section of a third embodiment of the hose-tubing unit,
Fig. 6
Cross section of a fourth embodiment of the hose-tubing unit,
Fig. 7
Cross section of a fifth embodiment of the hose-tubing unit,
Fig. 8
Cross section of a sixth embodiment of the hose-tubing unit,
Fig. 9
Cross section of a seventh embodiment of the hose-tubing unit,
Fig. 10A-B
first exemplary embodiment of the hose clamp area in top view and side view,
Fig. 11
A second embodiment of the Schlauchklem- menbereiches in top view,
Fig. 12
A third embodiment of the Schlauchklem- menbereiches in top view,
Fig. 13
A fourth embodiment of the Schlauchklem- menbereiches in top view,
Fig. 14
A first embodiment of a hose-tubing unit with holding device and rotor in plan view,
Fig. 15
a holding device of the first embodiment in side view,
Fig. 16
A second embodiment of a hose-tubing unit with sprung holding device and rotor in plan view,

Die in den Figuren 1A bis 1D in Untenansicht, Draufsicht, Obenansicht und im Querschnitt dargestellte Ausführungsform einer Schlauch-Schlauchbett-Einheit 1 besteht aus einem im Spritzgussverfahren hergestellten Schlauchbett 2 und einem über eine Kontaktfläche 4 in einem Quetschbereich 5 fest und nicht trennbar mit dem Schlauchbett 2 verbundenen Schlauch 3. Die Schlauch-Schlauchbett-Einheit 1 weist als Befestigungsmittel Aussparungen 6, 6' auf, welche auf entsprechende Nokken als Haltevorrich-tung an der Pumpe abgestimmt sind. Weitere Merkmale dieser Ausführungsform sind Griffe 18, 18' und Fortsätze des Schlauchbetts 2, die als Schlauchklemmenbereiche 8, 8' ausgebildet sind, sowie ein Beschriftungsbereich 7. Der Beschriftungsbereich 7 bietet Platz für Angaben über das gepumpte Medium, das Datum der Inbetriebnahme oder andere für Qualitätssicherung und Rückverfolgbarkeit wichtige Informationen. Der Vorteil eines im Spritzgussverfahren hergestellten Schlauchbetts 2 besteht vor allem darin, dass dessen Krümmung optimal auf den Radius eines Rotors abgestimmt werden kann. Weiter erlaubt diese Herstellungsart eine gewisse Freiheit in der Gestaltung von Befestigungsmitteln, Bedienelementen und Oberflächenstruktur der Schlauch-Schlauchbett-Einheit 1.The in the Figures 1A to 1D in a bottom view, top view, top view and cross-section embodiment of a hose-tubing unit 1 consists of an injection-molded hose bed 2 and a fixed contact surface 4 in a pinch area 5 and not separable connected to the hose bed 2 hose 3. The hose -Schlauchbett unit 1 has as a fastening means recesses 6, 6 ', which are matched to corresponding cams as Haltevorrich tion on the pump. Further features of this embodiment are handles 18, 18 'and extensions of the tubular bed 2, which are formed as a hose clamp areas 8, 8', and a labeling area 7. The labeling area 7 provides space for information about the pumped medium, the date of commissioning or other for Quality assurance and traceability important information. The advantage of a tubular bed 2 produced by injection molding is, above all, that its curvature can be optimally matched to the radius of a rotor. Furthermore, this type of production allows some freedom in the design of fasteners, controls and surface structure of the hose-tubing unit 1.

Die in den Figuren 2A bis 2C in Untenansicht, Draufsicht und Obenansicht dargestellte Ausführungsform der Schlauch-Schlauchbett-Einheit 1 besteht aus einem aus Bandmaterial hergestellten Schlauchbett 2 und einem über eine Kontaktfläche 4 im Quetschbereich 5 fest und nicht trennbar mit dem Schlauchbett 2 verbundenen Schlauch 3. Die Schlauch-Schlauchbett-Einheit 1 weist als Befestigungsmittel beispielsweise Aussparungen 6, 6' auf, welche auf die entsprechenden Haltevorrichtungen an der Pumpe abgestimmt sind. Weitere Merkmale dieser Ausführungsform sind Fortsätze des Schlauchbetts 2, die als Schlauchklemmenbereiche 8, 8' ausgebildet sind, sowie ein Beschriftungsbereich 7. Der Vorteil eines Schlauchbetts 2 aus Bandmaterial besteht vor allem darin, dass für verschiedene Rotorgrössen angepasste, spezifische Längen der Schlauch-Schlauchbett-Einheit 1 auch in Kleinserie kostengünstig hergestellt werden können. Das Bandmaterial für das Schlauchbett 2 ist dabei vorzugsweise so zu wählen, dass dieses eine ausreichende Zugfestigkeit in Längsrichtung und gleichzeitig eine möglichst geringe Biegespannung bei der Umschlingung des Rotors aufweist. Die beispielsweise als Befestigungsmittel dienenden Aussparungen 6, 6' und die Schlauchklemmenbereiche 8, 8' von Schlauch-Schlauchbett-Einheiten 1 aus Bandmaterial werden vorzugsweise durch Stanzen hergestellt.The in the FIGS. 2A to 2C Embodiment shown in the bottom view, top view and top view of the hose-tubing unit 1 consists of a made of strip material hose bed 2 and a fixed contact surface 4 in the squish area 5 and not separable with the Hose tube 2 connected hose 3. The hose-tubing unit 1 has, for example, as recesses on recesses 6, 6 ', which are matched to the corresponding holding devices on the pump. Further features of this embodiment are continuations of the tubular bed 2, which are formed as a hose clamp areas 8, 8 ', and a labeling area 7. The advantage of a tubular bed 2 made of strip material is mainly that adapted for different rotor sizes, specific lengths of the Schlauch-Schlauchbett- Unit 1 can be produced inexpensively even in small batches. The strip material for the tube bed 2 is preferably to be chosen so that this has sufficient tensile strength in the longitudinal direction and at the same time the lowest possible bending stress in the looping of the rotor. The recesses 6, 6 'serving as fastening means, for example, and the hose clamp regions 8, 8' of hose-hose-bed units 1 made of strip material are preferably produced by punching.

Die Figuren 3 bis 9 zeigen die Querschnitte verschiedener Ausführungsformen der Schlauch-Schlauchbett-Einheit 1 im Quetschbereich 5. Allen Varianten ist gemeinsam, dass erstens das Schlauchbett 2 mindestens im Quetschbereich 5 fest und nicht trennbar mit dem Schlauch 3 verbunden ist und zweitens das Material und/oder der Querschnitt des Schlauchbetts 2 geeignet sind, die Dehnbarkeit der Schlauch-Schlauchbett-Einheit 1 in Längsrichtung im Quetschbereich 5 so herabzusetzen, dass diese geringer ist im Vergleich zum Schlauch 3 alleine. Sinngemäss fallen auch alle diese Merkmale aufweisenden Ausführungsformen unter den Gedanken der Erfindung, welche durch Kombination oder Abwandlung der in Fig. 3 - 9 dargestellten Ausführungsformen hervorgehenden. Die Schlauch-Schlauchbett-Einheit 1 wird vorzugsweise hergestellt, indem das Schlauchbett 2 und der Schlauch 3 einzeln gefertigt und dann beispielsweise durch Kleben oder Schweissen fest und nicht trennbar verbunden werden (Fig. 3 - 6) oder mit einem kombinierten Hart-/Weich Spritzguss- oder Extrusionsverfahren, bei welchem der Verbund während der Herstellung erfolgt (Fig - 7, 8)The FIGS. 3 to 9 show the cross sections of various embodiments of the hose-tubing unit 1 in the squish area 5. All variants have in common that first the tube bed 2 at least in the pinch area 5 fixed and not separable connected to the tube 3 and secondly the material and / or the cross section of Tubular bed 2 are suitable to reduce the extensibility of the hose-tubing unit 1 in the longitudinal direction in the squish area 5 so that it is less compared to the tube 3 alone. Analogously, all embodiments having these features are also within the scope of the invention, which by combination or modification of the in Fig. 3 - 9 illustrated embodiments resulting. The hose-tubing unit 1 is preferably manufactured by the hose bed 2 and the hose 3 are manufactured individually and then firmly and non-separably connected, for example by gluing or welding ( Fig. 3 - 6 ) or with a combined hard / soft injection molding or extrusion process, in which the composite takes place during production (FIGS. 7, 8)

Fig. 3 zeigt den Querschnitt einer Ausführungsform der Schlauch-Schlauchbett-Einheit 1, bestehend aus einem beispielsweise konkav gekrümmten Schlauchbett 2 und einem Schlauch 3 mit tangentialer Kontaktfläche 4, welche mit dem Schlauchbett 2 beispielsweise verklebt oder verschweisst ist. Die konkave Krümmung von Schlauchbett 2 und Kontaktfläche 4 zentriert den Schlauch 3 in der Mitte des Schlauchbetts 2 und verhindert ein seitliches Abkippen beim Quetschvorgang. Ein Vorteil dieser Ausführungsform besteht weiter darin, dass die Kontaktfläche 4 aus demselben elastomeren Material besteht wie der Schlauch 3, diese wie eine Feder wirkt und dadurch Toleranzen im Quetschmass und in der Anpresskraft in einem gewissen Bereich ausgleichen kann. Fig. 3 shows the cross section of an embodiment of the hose-tubing unit 1, consisting of an example concave curved hose bed 2 and a hose 3 with tangential contact surface 4, which is glued or welded to the hose bed 2, for example. The concave curvature of the hose bed 2 and contact surface 4 centers the hose 3 in the middle of the hose bed 2 and prevents lateral tilting during the squeezing process. An advantage of this embodiment is further that the contact surface 4 is made of the same elastomeric material as the hose 3, this acts as a spring and thereby can compensate for tolerances in crushing and in the contact force in a certain range.

Fig. 4 zeigt den Querschnitt einer Ausführungsform der Schlauch-Schlauchbett-Einheit 1, bei welcher eine Längsrippe 20 des Schlauchs 3 in eine entsprechende Aussparung des Schlauchbetts 2 geklebt oder mit diesem verschweisst ist. Fig. 4 shows the cross section of an embodiment of the hose-tubing unit 1, in which a longitudinal rib 20 of the tube 3 is glued or welded in a corresponding recess of the tubular bed 2.

Fig. 5 zeigt den Querschnitt einer Ausführungsform der Schlauch-Schlauchbett-Einheit 1, bei welcher der Schlauch 3 innen und aussen eine nicht kreisrunde Querschnittsfläche aufweist. Es ist allen Ausführungsformen der Schlauch-Schlauchbett-Einheit 1 erfindungsgemäss gemeinsam, dass die feste, nicht trennbare Verbindung des Schlauchbetts 2 mit dem Schlauch 3 die Torsionslage des Schlauchs 3 in der Längsachse eindeutig bestimmt. Damit kann die Gestalt der Querschnittsfläche von Schlauch 3 innen und aussen grundsätzlich frei gewählt und beispielsweise für eine lange Lebensdauer oder für schonendes Pumpen optimiert werden. Fig. 5 shows the cross section of an embodiment of the hose-tubing unit 1, in which the hose 3 has a non-circular cross-sectional area inside and outside. It is common to all embodiments of the hose-tubing unit 1 according to the invention that the solid, non-separable connection of the tubing 2 with the tube 3 uniquely determines the torsion position of the tube 3 in the longitudinal axis. Thus, the shape of the cross-sectional area of the tube 3 inside and outside can basically be chosen freely and optimized, for example, for a long life or for gentle pumping.

Fig. 6 zeigt den Querschnitt einer Ausführungsform der Schlauch-Schlauchbett-Einheit, bei welcher das Schlauchbett 2 flexible Fortsätze 21, 21' als Aufnahme für den Schlauch 3 aufweist. Die Fortsätze 21, 21' werden dabei mit dem Schlauch 3 beispielsweise durch Kleben oder Schweissen fest und nicht trennbar verbunden. Diese Ausführungsform hat den Vorteil, dass bereits bestehende Schlauch-Meterware mit kreisrundem Innen- und Aussenquerschnitt verwendet werden kann. Fig. 6 shows the cross section of an embodiment of the hose-tubing unit, in which the hose bed 2 has flexible extensions 21, 21 'as a receptacle for the hose 3. The extensions 21, 21 'are connected to the tube 3, for example, by gluing or welding firmly and not separable. This embodiment has the advantage that already existing tube-piece goods with a circular inner and outer cross-section can be used.

Fig. 7 zeigt den Querschnitt einer Ausführungsform der Schlauch-Schlauchbett-Einheit 1, bei welcher das Schlauchbett 2 und der Schlauch 3 als Hart-/Weich-Verbund koextrudiert sind. Die extrudierte Meterware wird geschnitten, das Schlauchbett 2 auf die notwendige Länge gekürzt und mit geeigneten Befestigungsmitteln versehen. Fig. 7 shows the cross section of an embodiment of the hose-tubing unit 1, in which the tube bed 2 and the tube 3 are co-extruded as a hard / soft composite. The extruded fabric is cut, shortened the hose bed 2 to the necessary length and provided with suitable fasteners.

Fig. 8 zeigt den Querschnitt einer Ausführungsform der Schlauch-Schlauchbett-Einheit 1, bei der das Schlauchbett 2 verstärkende Elemente 22 wie Folien, Bänder, Filamente oder Fasern enthält, die geeignet sind, die Dehnbarkeit der Schlauch-Schlauchbett-Einheit 1 in Längsrichtung so herabzusetzen, dass diese geringer ist im Vergleich zum Schlauch 3 alleine. Die Herstellung dieser Ausführungsform erfolgt vorzugsweise indem die verstärkenden Elemente 22 dem Schlauchbett 2 während der Extrusion als Beilauf zugeführt werden. Die extrudierte Meterware wird geschnitten, das Schlauchbett 2 auf die notwendige Länge gekürzt und mit geeigneten Befestigungsmitteln versehen. Fig. 8 shows the cross section of an embodiment of the hose-tubing unit 1, in which the hose bed 2 reinforcing elements 22 such as films, tapes, filaments or fibers, which are suitable to reduce the extensibility of the hose-tubing unit 1 in the longitudinal direction, that this is less in comparison to the tube 3 alone. The production of this embodiment is preferably carried out by the reinforcing elements 22 are fed to the tube bed 2 during the extrusion as an afterthought. The extruded fabric is cut, shortened the hose bed 2 to the necessary length and provided with suitable fasteners.

Fig. 9 zeigt den Querschnitt einer Ausführungsform der Schlauch-Schlauchbett-Einheit 1, bei der das Schlauchbett 2 und der Schlauch 3 aus demselben Material bestehen und kein zusätzliches, verstärkendes Element 22 enthalten. Diese Ausführungsform erlaubt nur dann eine wesentliche Verringerung der Dehnbarkeit des Schlauchs 3 in Längsrichtung, wenn der Querschnitt des Schlauchbetts 2 grösser ist als der Materialquerschnitt des Schlauchs 3. Fig. 9 shows the cross section of an embodiment of the hose-tubing unit 1, in which the hose bed 2 and the hose 3 are made of the same material and no additional, reinforcing element 22 included. This embodiment allows only a substantial reduction in the extensibility of the tube 3 in the longitudinal direction, when the cross section of the tubular bed 2 is greater than the material cross-section of the tube. 3

Fig. 10 - 13 zeigen verschiedene Ausführungsformen von als Schlauchklemmenbereich 8 ausgebildeten Fortsätzen des Schlauchbetts 2 der Schlauch-Schlauchbett-Einheit 1. Allen Ausführungsformen gemeinsam sind zwei Schenkel 10, 10' die einen beispielsweise parallelen Schlitz 9 bilden, der mindestens so lang ist wie der halbe Umfang des Innenquerschnitts und weniger breit als die doppelte Wandstärke des grössten zu quetschenden Schlauchs 3. Fig. 10 - 13 show various embodiments of formed as a hose clamp portion 8 extensions of the tubular bed 2 of the hose-tubing unit 1. All embodiments are common two legs 10, 10 'which form a parallel slot 9, for example, which is at least as long as half the circumference of the inner cross-section and less wide than twice the wall thickness of the largest hose to be squeezed 3.

Fig. 10 A,B zeigt die bereits in Fig. 2 dargestellte Ausführungsform eines Schlauchklemmenbereichs 8 mit im Schlitz 9 eingeklemmten und abgequetschten Schlauch 3 in Obenansicht und Seitenansicht. Der Abstand zwischen den inneren Flanken der Schenkel 10, 10' des Schlauchklemmenbereichs 8 nimmt von aussen her kontinuierlich ab und geht in eine vorzugsweise konstante Breite des Schlitzes 9 über. Dies begünstigt eine einfache und mühelose Einführung des Schlauchs 3 von aussen her in den Schlitz 9, soweit bis der Schlauch 3 im gewünschten Ausmass gequetscht und der Durchfluss von Medium teilweise oder ganz unterbunden ist. Fig. 10 A, B shows the already in Fig. 2 illustrated embodiment of a hose clamp portion 8 with pinched in the slot 9 and squeezed hose 3 in top view and side view. The distance between the inner flanks the leg 10, 10 'of the hose clamp portion 8 decreases continuously from the outside and merges into a preferably constant width of the slot 9. This favors a simple and effortless introduction of the tube 3 from the outside into the slot 9, as far as the tube 3 is squeezed to the desired extent and the flow of medium is partially or completely prevented.

Fig. 11 zeigt in Obenansicht eine geschlossene, arretierbare Ausführungsform eines Schlauchklemmenbereichs 8 mit einem Schenkel 10', der einen Fortsatz 11 aufweist, welcher in eine passende Öffnung am gegenüberliegenden Schenkel 10 greift, wodurch verhindert wird, dass sich die beiden Schenkel 10, 10' durch den Druck des eingeklemmten Schlauchs 3 mit der Zeit öffnen können. Eine arretierbare Ausführungsform ist insbesondere für harte Schlauchmaterialien geeignet oder wenn der Schlauch 3 über lange Zeit sicher abgequetscht bleiben muss. Der Schlauchklemmenbereich 8 wird geöffnet, indem einer der Schenkel 10, 10' aus der gemeinsamen Ebene bewegt wird, wodurch der Fortsatz 11 aus der Öffnung in Schenkel 10 springt. Fig. 11 shows in top view a closed, lockable embodiment of a hose clamp portion 8 with a leg 10 ', which has an extension 11 which engages in a matching opening on the opposite leg 10, thereby preventing the two legs 10, 10' by the pressure of the clamped tube 3 can open over time. A lockable embodiment is particularly suitable for hard hose materials or if the hose 3 must remain securely squeezed for a long time. The hose clamp area 8 is opened by moving one of the legs 10, 10 'out of the common plane, causing the extension 11 to spring out of the opening in leg 10.

Fig. 12 zeigt in Obenansicht eine weitere geschlossene, arretierbare Ausführungsform eines Schlauchklemmenbereichs 8 mit zwei Schenkeln 10, 10', welche sich überlappend ineinander verschränken lassen, wodurch verhindert wird, dass sich die beiden Schenkel 10, 10' durch den Druck des eingeklemmten Schlauchs 3 mit der Zeit öffnen können. Fig. 12 shows in top view another closed, lockable embodiment of a hose clamp portion 8 with two legs 10, 10 ', which can be overlapped into each other, thereby preventing the two legs 10, 10' by the pressure of the clamped hose 3 with time can open.

Fig. 13 zeigt in Obenansicht eine weitere geschlossene, arretierbare Ausführungsform eines Schlauchklemmenbereichs 8, bei der die Schenkel 10, 10' eine ineinandergreifende, selbstarretierende Verzahnung 12 aufweisen. Die Breite des Schlitzes 9 lässt sich dabei durch Druck auf die Aussenseite der Schenkel 10, 10' solange stufenweise verringern, bis der Schlauch 3 im gewünschten Ausmass gequetscht und der Durchfluss von Medium teilweise oder ganz unterbunden ist. Der Schlauchklemmenbereich 8 wird geöffnet, indem einer der Schenkel 10, 10' aus der gemeinsamen Ebene bewegt wird, wodurch sich die Verzahnung 12 löst. Fig. 13 shows in top view another closed, lockable embodiment of a hose clamp area 8, in which the legs 10, 10 'have an interlocking, self-locking toothing 12. The width of the slot 9 can thereby be gradually reduced by pressure on the outside of the legs 10, 10 'until the tube 3 is squeezed to the desired extent and the flow of medium is partially or completely prevented. The hose clamp portion 8 is opened by one of the legs 10, 10 'is moved out of the common plane, whereby the teeth 12 dissolves.

Fig. 14 zeigt die aus Fig. 1 bekannte Schlauch-Schlauchbett-Einheit 1 mit einem im Spritzgussverfahren hergestellten Schlauchbett 2 zusammen mit Haltevorrichtungen 15, 15a und den Rollen 13 eines Rotors 14 als Quetschelementen in Draufsicht. Sinngemäss gelten die nachfolgenden Ausführungen auch für Schlauch-Schlauchbett-Einheiten 1 mit einem Schlauchbett 2 aus Bandmaterial gemäss Fig. 2. Fig. 14 shows the off Fig. 1 Known hose-tubing unit 1 with an injection-molded hose bed 2 together with holding devices 15, 15a and the rollers 13 of a rotor 14 as squeezing in plan view. Analogously, the following explanations also apply to hose-hose bed units 1 with a hose bed 2 made of strip material according to Fig. 2 ,

Die Befestigung einer Schlauch-Schlauchbett-Einheit 1 gemäss Fig. 1 an der Pumpe erfolgt, indem auf beiden Seiten der Schlauch 3 in einen Schlitz 16 einer Haltevorrichtung 15, 15a eingelegt und der Druck auf die Schlauch-Schlauchbett-Einheit 1 über die Innenseite der Griffe 18 und 18' solange erhöht wird, bis Nocken 17 und 17a der Haltevorrichtung 15, 15a in die als Befestigungsmittel dienenden Aussparungen 6, 6' des Schlauchbetts 2 einrasten. Damit ist die Schlauch-Schlauchbett-Einheit 1 relativ zu den Rollen 13 in eindeutiger Position befestigt, wodurch sich eine definierte und reproduzierbare Anpresskraft auf den Schlauch 3 einstellt. Die Schlauch-Schlauchbett-Einheit 1 kann von der Pumpe getrennt werden, indem durch gleichzeitigen Druck auf die Aussenseite der Griffe 18 und 18', die als Befestigungsmittel dienenden Aussparungen 6, 6' des Schlauchbetts 2 von den Nocken 17, 17a der Haltevorrichtungen 15, 15a abgehoben werden, und dadurch die Verbindung der Schlauch-Schlauchbett-Einheit 1 zur Haltevorrichtung 15, 15a gelöst wird. Aus Fig. 14 geht hervor, dass die bevorzugte Ausführung der Haltevorrichtung 15, 15a die gleichzeitige Befestigung von zwei gegenüberliegenden Schlauch-Schlauchbett-Einheiten 1 und 1a erlaubt. Mit einer solchen Anordnung heben sich die von den Schlauch-Schlauchbett-Einheiten 1 und 1 a über die Schläuche 3 und 3a auf den Rotor 14 wirkenden Radialkräfte weitgehend auf, was die Verwendung kostengünstiger Lager für den Rotor 14 und die doppelte Anzahl Kanäle für eine bestimmte Bautiefe des Rotors 14 erlaubt.The attachment of a hose-tubing unit 1 according to Fig. 1 takes place at the pump by on both sides of the hose 3 in a slot 16 of a holding device 15, 15 a inserted and the pressure on the hose-bed unit 1 on the inside of the handles 18 and 18 'is increased until cams 17 and 17a of the holding device 15, 15a engage in the serving as fastening means recesses 6, 6 'of the tubular bed 2. Thus, the hose-tubing unit 1 is fixed relative to the rollers 13 in an unambiguous position, whereby a defined and reproducible contact force on the tube 3 sets. The hose-tubing unit 1 can be disconnected from the pump by simultaneously pressing on the outside of the handles 18 and 18 ', the recesses 6, 6' of the tubing 2 serving as fastening means, of the cams 17, 17a of the holders 15, 15a are lifted, and thereby the connection of the hose-tubing unit 1 to the holding device 15, 15a is released. Out Fig. 14 It can be seen that the preferred embodiment of the holding device 15, 15a allows the simultaneous attachment of two opposing hose-bag assemblies 1 and 1a. With such an arrangement, the radial forces acting from the hose-tubing bed units 1 and 1a on the hoses 3 and 3a to the rotor 14 largely cancel each other out, which makes it possible to use inexpensive bearings for the rotor 14 and double the number of channels for a given one Construction depth of the rotor 14 allowed.

In Fig. 14 ist die Schlauch-Schlauchbett-Einheit 1a mit Aussparungen 19a, 19a' auf den Nocken 17', 17a' der Haltevorrichtung 15, 15a dargestellt. In dieser Position ist die Schlauch-Schlauchbett-Einheit 1a an der Pumpe befestigt, der Schlauch 3a ist jedoch vom Druck der Rollen 13 weitgehend entlastet. Mit dieser Einstellung lassen sich die elastomeren Eigenschaften des Schlauchs 3a bei längerem Stillstand der Pumpe erhalten, ohne dass die Schlauch-Schlauchbett-Einheit 1a ganz von der Pumpe getrennt werden muss. Es versteht sich von selbst, dass mit einer Schlauch-Schlauchbett-Einheit 1 welche mehrere, allenfalls feinere Aussparungen der Art 6, 6' und 19, 19' aufweist, die Anpresskraft stufenweise einstellbar wird. Damit kann beispielsweise die Anpresskraft der Schlauch-Schlauchbett-Einheit 1 auf die Quetschelemente entsprechend dem zu erzeugenden Druck eingestellt werden. Für den Gedanken der Erfindung ist es dabei unerheblich, ob die Mittel für eine abgestufte oder stufenlose Einstellung der Anpresskraft an der Schlauch-Schlauchbett-Einheit 1 oder an der Haltevorrichtung an der Pumpe angebracht sind, wie auch ob diese direkt oder indirekt über Hebel, Keile, Schrauben oder andere Stellelemente wirken.In Fig. 14 the hose-tubing unit 1a with recesses 19a, 19a 'on the cam 17', 17a 'of the holding device 15, 15a shown. In this position, the hose-tubing unit 1a is attached to the pump, the However, hose 3a is largely relieved of the pressure of the rollers 13. With this setting, the elastomeric properties of the tube 3a can be obtained with a longer standstill of the pump, without the hose-tubing unit 1a must be completely separated from the pump. It goes without saying that with a hose-tubing unit 1 which several, at best, finer recesses of the type 6, 6 'and 19, 19', the contact pressure is gradually adjustable. Thus, for example, the contact pressure of the hose-tubing unit 1 can be adjusted to the squeezing according to the pressure to be generated. For the idea of the invention, it is irrelevant whether the means for a graded or continuous adjustment of the contact pressure on the hose-tubing unit 1 or on the holding device are attached to the pump, as well as whether this directly or indirectly via levers, wedges , Screws or other adjusting elements act.

Fig. 15 zeigt die Haltevorrichtung 15 in Seitenansicht. Fig. 15 shows the holding device 15 in side view.

Fig. 16 zeigt die bereits von Fig. 1 bekannte Schlauch-Schlauchbett-Einheit 1 mit einer gefedert ausgeführten Haltevorrichtung 15, 15a und den Rollen 13 eines Rotors 14 als Quetschelemente in Draufsicht. Federn 23, 23a weisen Nocken 24, 24a auf, welche auf die Aussparungen 6, 6' des Schlauchbetts 2 abgestimmt sind. Die Feder 23a setzt die Schlauch-Schlauchbett-Einheit 1 unter eine bestimmte Zugspannung, die eine entsprechende Anpresskraft der Schlauch-Schlauchbett-Einheit 1 an die Rollen 13 des Rotors 14 bewirkt. Die Haltevorrichtung 15, 15a kann dabei ein- oder beidseitig Federn aufweisen, welche für unterschiedliche Anpresskraft auch austauschbar ausgeführt sein können. Wie bereits in Fig. 14 ist die Schlauch-Schlauchbett-Einheit 1a auch hier vom Anpressdruck entlastet dargestellt, indem der Nocken 24 der Feder 23 in die Aussparung 19a und der Nocken 17a' der Haltevorrichtung 15a in die Aussparung 19a' greift. Mit einer gefedert ausgeführten Haltevorrichtung 15a kann beispielsweise der im Schlauch 3 auftretende Druck sicher begrenzt werden. Sobald der Innendruck einen bestimmten Wert übersteigt kann die von der Feder 23a bestimmte, vom Schlauchbett 2 auf den Schlauch 3 wirkende Anpresskraft auf die Quetschelemente das SchlauchLumen nicht mehr vollständig schliessen, wodurch ein Rückfluss stattfindet und die Pumpwirkung entsprechend nachlässt. Es versteht sich von selbst, dass es für den Gedanken der Erfindung unerheblich ist, ob das federnde Element als Teil der Haltevorrichtung 15a oder als Teil der Schlauch-Schlauchbett-Einheit 1 ausgeführt ist oder über weitere Elemente indirekt auf die Schlauch-Schlauchbett-Einheit 1 wirkt. Fig. 16 shows the already of Fig. 1 known hose-hose bed unit 1 with a spring-mounted holding device 15, 15a and the rollers 13 of a rotor 14 as squeezing in plan view. Springs 23, 23a have cams 24, 24a, which are matched to the recesses 6, 6 'of the tubular bed 2. The spring 23a sets the hose-tubing unit 1 under a certain tensile stress, which causes a corresponding pressing force of the hose-tubing unit 1 to the rollers 13 of the rotor 14. The holding device 15, 15a can have one or both sides springs, which can also be designed to be interchangeable for different contact pressure. As already in Fig. 14 the hose-tubing unit 1a is also shown here relieved of the contact pressure by the cam 24 of the spring 23 in the recess 19a and the cam 17a 'of the holding device 15a engages in the recess 19a'. By means of a sprung holding device 15a, for example, the pressure occurring in the hose 3 can be reliably limited. As soon as the internal pressure exceeds a certain value, that determined by the spring 23a, from the hose bed 2 to the hose 3 acting pressure force on the squeezing the hose lumen no longer completely close, whereby a backflow takes place and the pumping action decreases accordingly. It goes without saying that it is irrelevant to the idea of the invention whether the resilient element is designed as part of the holding device 15a or as part of the hose-tubing unit 1 or indirectly via further elements to the hose-tubing unit 1 acts.

Als Einwegartikel besteht jede neue Schlauch-Schlauchbett-Einheit 1 jeweils nicht nur aus einem neuen Schlauch 3 sondern immer auch aus einem neuen Schlauchbett 2. Dadurch sind unabhängig von der Ausführungsform immer reproduzierbare Ausgangsbedingungen sichergestellt.As a disposable article each new hose-bed unit 1 each not only from a new hose 3 but always from a new hose bed 2. This ensures regardless of the embodiment always reproducible starting conditions.

Obschon die Schlauch-Schlauchbett-Einheit 1 hier vorzugsweise in Zusammenhang mit Pumpen beschrieben wird, die einen Rotor und Rollen als Quetschelemente aufweisen, ist sie nicht an eine bestimmte Art, Ausführung oder Dimension von Quetschelementen gebunden und kann beispielsweise auch mit Finger- oder Stössel-Pumpen eingesetzt werden. Auch versteht es sich von selbst, dass als Mittel für eine lösbare Befestigung der Schlauch-Schlauchbett-Einheit 1 an der Pumpe eine Vielzahl von geometrischen Formen wie beispielsweise Ösen, Höcker, Rillen, Fortsätze oder Aussparungen verschiedener Anzahl und Kombination mit darauf abgestimmten Elementen an der Pumpe wie beispielsweise Haken, Bolzen, Schnallen oder Klemmen der Anforderung entsprechend gewählt werden können und auch Schlauch-Schlauchbett-Einheiten 1 mit anderen als den hier genannten oder zusätzlichen, indirekten Befestigungsmitteln wie beispielsweise Klammern oder Kassetten unter den Gedanken der Erfindung fallen. Bei genügend festem und steifem Schlauchbett, genügt beispielsweise eine einzige Haltevorrichtung um die Schlauch-Schlauchbett-Einheit 1 auf die Quetschelemente zu pressen. Ausführungen von Peristaltikpumpen, bei welchen die Schlauch-Schlauchbett-Einheit 1 mit einer oder mehr als zwei Haltevorrichtungen verbunden sind, sind damit ebenfalls erfindungsgemäss.Although the hose-tubing unit 1 is described here preferably in connection with pumps which have a rotor and rollers as crimping elements, it is not bound to a specific type, design or dimension of crimping elements and can also be used, for example, with fingers or plungers. Pumps are used. Also, it goes without saying that as a means for releasably securing the hose-tubing unit 1 to the pump a variety of geometric shapes such as eyelets, bumps, grooves, extensions or recesses of various numbers and combination with matched elements on the Pump such as hooks, bolts, buckles or clamps can be selected according to the requirement and hose-tubing units 1 with other than those mentioned here or additional, indirect fasteners such as brackets or cassettes fall under the spirit of the invention. If the hose bed is sufficiently firm and stiff, for example, a single holding device is sufficient to press the hose-bed unit 1 onto the squeezing elements. Embodiments of peristaltic pumps in which the hose-tubing unit 1 are connected to one or more than two holding devices are thus also according to the invention.

Claims (11)

  1. A peristaltic pump
    - with at least one tube bed (2)
    - with at least one tube (3)
    - with at least one pressing element which can be moved over the tube (3) and which presses the same in a pressed region (5) against the tube bed (2),
    - with at least one holding device (15) for fastening the tube bed (2) with respect to the at least one pressing element,
    characterized in that
    - tube bed (2) and tube (3) are connected to each other in a firm and non-detachable manner and together form a tube-tube bed unit (1), wherein the firm, non-detachable connection of tube bed (2) and tube (3) in the tube-tube bed unit (1) is generated by adhering, welding, injection molding or coextruding the tube bed (2) together with the tube (3),
    - at least one suitable means (6) is present which allows a detachable fastening of said tube-tube bed unit (1) to the at least one holding device (15).
  2. The peristaltic pump according to patent claim 1, characterized in that the tube bed (2) of the tube-tube unit (1) has a lower stretchability than the tube (3).
  3. The peristaltic pump according to patent claim 1 or patent claim 2, characterized in that the tube-tube bed unit (1) has at least one region formed as grip (18) for operating the at least one means (6).
  4. The peristaltic pump according to any one of the patent claims 1 to 3, characterized in that the tube-tube bed unit (1) has at least one tube clamping region (8).
  5. The peristaltic pump according to patent claim 4, characterized in that the at least one tube clamping region (8) of the tube-tube bed unit (1) is configured as gap.
  6. The peristaltic pump according to any one of the patent claims 1 to 5, characterized in that the at least one means (6) for fastening the tube-tube bed unit (1) to the at least one holding device (15) is formed by at least one tube bed (2) region or extension configured as recess, eyelet, cam, bump or tooth.
  7. The peristaltic pump according to any one of the patent claims 1 to 5, characterized in that the at least one means (6) for fastening the tube-tube bed unit (1) to the at least one holding device (15) is formed as clamp, bracket or cassette.
  8. The peristaltic pump according to any one of the patent claim 1 to 7, characterized in that the at least one means (6) for fastening the tube-tube bed unit (1) to the at least one holding device (15) is formed in such a manner that the pressing force of the tube-tube bed unit (1) against the at least one pressing element is adjustable.
  9. The peristaltic pump according to any one of the patent claims 1 to 8, characterized in that the at least one means (6) for fastening the tube-tube bed unit (1) to the at least one holding device (15) contains at least one spring element (23) which produces a pressing force corresponding to its spring force of the tube-tube bed unit (1) against the at least one pressing element.
  10. The peristaltic pump according to patent claim 1, characterized in that tube bed (2) and tube (3) of the tube-tube bed unit (1) are manufactured by means of two-component injection molding.
  11. The peristaltic pump according to patent claim 1, characterized in that tube bed (2) and tube (3) of the tube-tube bed unit (1) are manufactured by means of coextruding.
EP04734653A 2003-06-06 2004-05-25 Peristaltic pump Expired - Lifetime EP1664535B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH9882003 2003-06-06
PCT/CH2004/000317 WO2004109109A1 (en) 2003-06-06 2004-05-25 Peristaltic pump

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EP1664535A1 EP1664535A1 (en) 2006-06-07
EP1664535B1 true EP1664535B1 (en) 2011-03-16

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US (1) US20060177329A1 (en)
EP (1) EP1664535B1 (en)
AT (1) ATE502213T1 (en)
DE (1) DE502004012312D1 (en)
WO (1) WO2004109109A1 (en)

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WO2012112920A1 (en) 2011-02-19 2012-08-23 Shipman Douglas Improved pump, method of operation, and method of manufacture
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US20180340530A1 (en) * 2017-05-24 2018-11-29 Clayton Vowels Multi-tubular peristaltic pump apparatus and methods of making and using the same
EP4166786A1 (en) * 2021-10-18 2023-04-19 Lrp Ag Peristaltic pump

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Publication number Publication date
EP1664535A1 (en) 2006-06-07
US20060177329A1 (en) 2006-08-10
ATE502213T1 (en) 2011-04-15
WO2004109109A1 (en) 2004-12-16
DE502004012312D1 (en) 2011-04-28

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