EP1342011A1 - Pompe tubulaire peristaltique - Google Patents

Pompe tubulaire peristaltique

Info

Publication number
EP1342011A1
EP1342011A1 EP01995604A EP01995604A EP1342011A1 EP 1342011 A1 EP1342011 A1 EP 1342011A1 EP 01995604 A EP01995604 A EP 01995604A EP 01995604 A EP01995604 A EP 01995604A EP 1342011 A1 EP1342011 A1 EP 1342011A1
Authority
EP
European Patent Office
Prior art keywords
peristaltic
roller wheel
hose
pressure bracket
pump according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP01995604A
Other languages
German (de)
English (en)
Other versions
EP1342011B1 (fr
Inventor
Christian Haser
Peter Zentner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
WOM World of Medicine GmbH
Original Assignee
WOM World of Medicine GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by WOM World of Medicine GmbH filed Critical WOM World of Medicine GmbH
Publication of EP1342011A1 publication Critical patent/EP1342011A1/fr
Application granted granted Critical
Publication of EP1342011B1 publication Critical patent/EP1342011B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B43/00—Machines, pumps, or pumping installations having flexible working members
    • F04B43/12—Machines, pumps, or pumping installations having flexible working members having peristaltic action
    • F04B43/1253—Machines, pumps, or pumping installations having flexible working members having peristaltic action by using two or more rollers as squeezing elements, the rollers moving on an arc of a circle during squeezing
    • 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 of rotation with rollers attached to the roller wheel, the rollers rolling on a circular path with a certain radius related to the roller wheel axis of rotation, and with a pressure bracket with a support surface, the support surface runs along a circular path of a certain radius around the axis of rotation of the roller wheel and a flexible hose can be inserted between the support surface and the rollers of the roller wheel.
  • a peristaltic peristaltic pump of the construction mentioned at the outset is known from DE-G 83 29 579.
  • the pressure bracket is formed by a deformable band which is clamped firmly at one end and is adjustable in its axial direction at the other end, which enables adaptation to different hose diameters.
  • the band consisting of a metallic material, plastic or a fabric therefore has the disadvantage of being too elastic.
  • the elastic band is stretched over the rollers and runs straight between the rollers, whereby the liquid delivery space formed in the flexible hose is reduced so that the transported delivery quantity and thus the delivery rate are relatively low.
  • a peristaltic hose pump with a rigid pressure bracket is also known in 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 due to manufacturing and assembly tolerances of the mechanical parts. Since tolerances cannot be completely ruled out, the rigid pressure bracket is pressed against the roller wheel with a spring, as is known, for example, from arthroscopic pumps from Stryker, Arthrex and FMS. The disadvantage here is that the spring force introduced is directed and only presses the hose exactly in the direction of force in the roll position. In all other positions of the roller, only one component of the spring force is ever effective. With the roller at 90 ° to the direction of the spring force, this component is zero. This means that only limited tolerance compensation is possible. High pressures cannot be generated for large delivery rates.
  • the invention is therefore based on the technical problem of providing a peristaltic peristaltic pump with an improved delivery pressure, in particular also with a likewise improved delivery rate.
  • Basics of the invention and preferred embodiments are based on the technical problem of providing a peristaltic peristaltic pump with an improved delivery pressure, in particular also with a likewise improved delivery rate.
  • the invention provides that the support surface is formed from an elastically deformable plastic and that the pressure bracket is preformed with the proviso that the course of the support surface in the relieved state of the pressure bracket essentially corresponds to the course of the support surface in the tensioned state.
  • a constant clamping of the hose between the roller and the pressure bracket is achieved in any position of the roller relative to the pressure bracket.
  • the relieved state corresponds to an installation position of the pressure bracket, in which a hose can be 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, the hose being clamped between the rollers and the support surface.
  • the clamping bracket is supported or fixed in both positions in the area of its two ends and runs freely between them, ie is not supported by other components.
  • the elastic band is stretched over the rollers and runs straight between the rollers, whereby the liquid delivery space contained in the flexible hose is reduced, so that the transported delivery volume and thus the delivery rate is relatively low are.
  • the rigid pressure bracket which is pressed against the roller wheel by means of a spring, only presses off the hose exactly in the roller position in the direction of the force of the spring force, so that no high pressures can be generated for high delivery rates.
  • the hose pump according to the invention it is achieved that between two rollers there is sufficient space to transport the liquid, and that at the same time high pressures can be achieved with a high delivery rate.
  • the invention thus eliminates the disadvantages inherent in the known peristaltic pumps.
  • the pressure bracket is made of rigid, metallic material and is provided with the support surface made of the elastically deformable plastic.
  • the pressure bracket is formed entirely from the elastically deformable plastic.
  • the plastic is preferably polyoxymethylene (POM).
  • POM polyoxymethylene
  • the pressure bracket is made of materials with great elasticity and can be designed so that it clamps the hose on the rollers when it is closed by its own deformation with a pre-tension. When the roller wheel moves, the elastic deformation (preload) with the roller runs through the pressure bracket.
  • Further advantageous embodiments of the invention result from the further subclaims. Reference is made in particular to the tensioning device according to subclaim 8. This clamps the pressure bracket at the same time as the hose pump is closed, so that the operator cannot get his fingers between the rollers and the pressure bracket in the tensioned state.
  • FIG. 2 is a perspective view of the front panel of FIG. 1 without showing the cap of each hose pump,
  • Fig. 5 the rear perspective view of the pressure bracket with clamping washer.
  • 1 to 3 show the front plate 15 of a device housing for two peristaltic hose pumps 20, 21, the roller wheels 1 of which are each equipped with four rollers 2 and are driven by electric drive motors 16 mounted on the rear side of the front plate 15.
  • Each roller wheel 1 with four rollers 2 is assigned a pressure bracket 3 with a support surface 4 on the side facing the rollers 2, the support surface 4 being provided with an inlet region 5, a central region 6 and an outlet region 7, as shown in FIG. 4 is shown in more detail.
  • the pressure bracket 3 is pivotally mounted about a pivot axis 8 arranged on the front plate 15 and is provided at its opposite end with a clamping pin 10 which on the one hand engages in a clamping bracket 25 and on the other hand interacts with the clamping catches 26, 27 of a clamping disk 24 which acts on the front plate 15 is permanently mounted.
  • a locking plate 13 is fixedly connected to the clamping bracket 25 and can be pivoted by means of an actuating element 11 attached to it.
  • the rollers 2 of the peristaltic hose 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 bracket 3, the support surface 4 along a circular path with the radius R2 around the axis of rotation D of the roller wheel 1 runs and a flexible hose 19 can be inserted between the support surface 4 and the rollers 2 of the roller wheel 1.
  • the pressure bracket 3 and the support surface 4 are formed in one piece from an elastically deformable plastic.
  • the pressure bracket 3 can also be made of metallic material exist and be provided with an internal covering made of plastic, which forms the support surface 4.
  • the pressure bracket 3 is preformed with the proviso that the course of the support surface 4 in the relieved state of the pressure bracket 3 essentially corresponds to the course of the support surface 4 in the tensioned state.
  • the preferred plastic used is polyoxyethylene (POM). Delrin from Dupont or Hostaform from Hoechst are preferably used.
  • the tensile modulus of elasticity is preferably> 3000 MPa (megapascal).
  • the flexural 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 sliding friction coefficient against steel in dry running is preferably> 0.30.
  • Such a plastic POM has proven in experiments to be particularly suitable for the support surface 4 of the pressure bracket 3 of the peristaltic pumps 20, 21.
  • the pressure bracket 4 of each hose pump 20, 21 is opposite a holder 17 fixed to the front plate 15 with two through openings 18 for inserting a flexible hose 19, which is directed tangentially to the roller wheel 1 and on the inside of the pressure bracket 3 on the support surface 4 Facility is coming.
  • the pressure bracket 4 has an inlet area 5, a center area 6 and an outlet area 7, the pressure bracket 3 having an enlarged cross section at least in the outlet area 7, preferably also in the inlet area 5, compared to the center area 6.
  • the central region 6 extends, based on 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 wrapping of the roller wheel 1 through the hose 19.
  • the pressure bracket 3 extends, based on the axis of rotation D, over an angle of 90 ° to 180 °, preferably from 120 ° to 170 °.
  • the pressure bracket 3 which is fixed at one end on the front plate 15 and is mounted on the pivot axis 8 parallel to the axis of rotation D of the roller wheel 1, is at its other end by means of the tensioning device 9 between an assembly position I for the hose 19 and an operating position II for the hose 19 pivotable.
  • the clamping device 9 has the clamping pin 10 arranged at the second end of the pressure bracket 3 and the locking plate 13 with an actuating element 11, which can be rotated about a clamping axis of rotation S parallel to the axis of rotation D of the roller wheel 1.
  • the dowel pin 10 is removed from one catch 26 of the spring washer 24 in the other Notch 27 moves, the tensioning disk 24 being resiliently formed by an arcuate slot 28 running between the two notches 26, 27.
  • the cover 13 in the operating position II covers the roller wheel 1 and the inserted hose 19 on the end face and thus fixes the hose 19 in the direction of the axis of rotation D of the roller wheel 1.
  • the cover 13 can be non-positively latched in the operating position II.
  • the roller wheel 1 and / or the pressure bracket 3 are interchangeable.
  • the radius R 1 is the roll radius of the outside of each roll 2 in relation to the axis of rotation D of the roll wheel 1 and the radius R 2 as the peristaltic pump 20 the distance of the support surface 4 from the center axis D of the roller wheel 1 is defined.
  • the roller wheel 1 and / or the pressure bracket 3 can be selected with respect to the radius difference R2-R1 with the proviso that in the mounting position I a given hose 19 with an outside diameter smaller than R2-R1 can be inserted.
  • the roller wheel 1 and / or the pressure bracket 3 can be selected with regard to the radius difference R2-R1 with the proviso that a given hose with a wall thickness of ⁇ R2-R1 / 2 can be used.
  • the peristaltic hose pumps 20, 21 shown form an arthroscopy pump in which the hose pump 20 shown on the left in FIG. 1 forms the suction side and the hose pump 21 shown on the right in FIG. 1 forms the rinsing side.
  • the suction side hose pump 20 rotates clockwise.
  • the hose pump 21 on the rinsing side rotates counterclockwise.
  • Holders 22 for the hose 19 are assigned to both hose pumps 20, 21. Pressure sensors are arranged in the holders 22. Between the two
  • the front plate 15 comprises a window 23 for a display for displaying the values of pressure, flow rate and the like.
  • the arthroscopy pump is
  • the pressure bracket 3 has, at least in the central region 6, a slot-shaped recess which runs along a circular path and the axis of rotation D of the roller wheel 1.

Landscapes

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

Abstract

L'invention concerne une pompe tubulaire péristaltique comprenant une roue à galets (1) pouvant tourner autour d'un pivot de roue à galets (D) et présentant des galets (2) montés sur ladite roue à galets (1). Les galets (2) roulent sur une trajectoire de rayon R1, par rapport au pivot de la roue à galets (D). La pompe tubulaire péristaltique comprend en outre un étrier de pression (3) muni d'une surface d'appui (4) qui s'étend le long d'une trajectoire de rayon R2, autour du pivot (D) de la roue à galets (1). Un tuyau flexible (10) peut être introduit entre la surface d'appui (4) et les galets (2) de la roue à galets (1). Selon l'invention, la surface d'appui (4) est à base de matière plastique à déformation élastique et l'étrier de pression (3) est préformé, sous réserve qu'à l'état relâché de l'étrier de pression (3), le cours de la surface d'appui (4) corresponde sensiblement au cours de la surface d'appui (4) à l'état contraint.
EP01995604A 2000-12-12 2001-12-10 Pompe tubulaire peristaltique Expired - Lifetime EP1342011B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10062600A DE10062600C2 (de) 2000-12-12 2000-12-12 Peristaltische Schlauchpumpe
DE10062600 2000-12-12
PCT/DE2001/004725 WO2002048549A1 (fr) 2000-12-12 2001-12-10 Pompe tubulaire peristaltique

Publications (2)

Publication Number Publication Date
EP1342011A1 true EP1342011A1 (fr) 2003-09-10
EP1342011B1 EP1342011B1 (fr) 2006-10-11

Family

ID=7667318

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01995604A Expired - Lifetime EP1342011B1 (fr) 2000-12-12 2001-12-10 Pompe tubulaire peristaltique

Country Status (6)

Country Link
US (1) US7287968B2 (fr)
EP (1) EP1342011B1 (fr)
AT (1) ATE342443T1 (fr)
AU (1) AU2002226297A1 (fr)
DE (2) DE10062600C2 (fr)
WO (1) WO2002048549A1 (fr)

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Also Published As

Publication number Publication date
DE10062600A1 (de) 2002-06-20
EP1342011B1 (fr) 2006-10-11
US7287968B2 (en) 2007-10-30
ATE342443T1 (de) 2006-11-15
DE50111227D1 (de) 2006-11-23
AU2002226297A1 (en) 2002-06-24
WO2002048549A1 (fr) 2002-06-20
US20040037724A1 (en) 2004-02-26
DE10062600C2 (de) 2002-12-05

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