EP2890895B1 - Hose receptacle of a roller pump - Google Patents
Hose receptacle of a roller pump Download PDFInfo
- Publication number
- EP2890895B1 EP2890895B1 EP13753167.9A EP13753167A EP2890895B1 EP 2890895 B1 EP2890895 B1 EP 2890895B1 EP 13753167 A EP13753167 A EP 13753167A EP 2890895 B1 EP2890895 B1 EP 2890895B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- tube
- hose
- pump head
- lever mechanism
- lever
- 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.)
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Links
- 230000007246 mechanism Effects 0.000 claims description 68
- 230000002572 peristaltic effect Effects 0.000 claims description 37
- 230000001681 protective effect Effects 0.000 claims description 17
- 238000006073 displacement reaction Methods 0.000 claims description 12
- 238000013461 design Methods 0.000 description 8
- 238000003780 insertion Methods 0.000 description 5
- 230000037431 insertion Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
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- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 210000002445 nipple Anatomy 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000003213 activating effect Effects 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000010409 ironing Methods 0.000 description 1
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- 230000003014 reinforcing effect Effects 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
Images
Classifications
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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
- F04B43/1238—Machines, pumps, or pumping installations having flexible working members having peristaltic action using only one roller as the squeezing element, the roller moving on an arc of a circle during squeezing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B43/00—Machines, pumps, or pumping installations having flexible working members
- F04B43/12—Machines, pumps, or pumping installations having flexible working members having peristaltic action
- F04B43/1253—Machines, pumps, or pumping installations having flexible working members having peristaltic action by using two or more rollers as squeezing elements, the rollers moving on an arc of a circle during squeezing
- F04B43/1276—Means for pushing the rollers against the tubular flexible member
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B43/00—Machines, pumps, or pumping installations having flexible working members
- F04B43/12—Machines, pumps, or pumping installations having flexible working members having peristaltic action
- F04B43/1253—Machines, pumps, or pumping installations having flexible working members having peristaltic action by using two or more rollers as squeezing elements, the rollers moving on an arc of a circle during squeezing
- F04B43/1284—Means for pushing the backing-plate against the tubular flexible member
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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
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/16—Casings; Cylinders; Cylinder liners or heads; Fluid connections
Definitions
- the present invention relates to a peristaltic pump and more particularly to a tensioning device arranged in / on a hose receiving compartment of the hose or roller pump (squeeze pump) for applying a hose which can be inserted into the shaft, preferably of the one-way design.
- Roller or hose (squeeze) pumps are positive displacement pumps in which the medium to be pumped is forced through it by elastic external mechanical deformation of a hose. Due to the gentle promotion of the medium (without this to shear or swirl) peristaltic pumps are used in particular for medical purposes.
- a flexible / elastically deformable hose is inserted so that it is guided around a rotatable pump head over a predetermined peripheral portion on which a number of angularly spaced rollers are rotatably mounted, with appropriate rotation of the pump head with the hose be sequentially grooved and squeezed / clamped.
- the hose is supported either on the outside of the pump housing or he is stretched with a predetermined tensile force around and against the pump head.
- the movement of the pump head causes the respective Abklemmstelle a straight meshing roller along the tube moves forward, thereby driving the fluid within the roller directly ahead of the hose section.
- the generation of the intake negative pressure in the hose section directly following the relevant roller is generally generated by the inherent elasticity of the hose material, as a result of which the hose tries to regain its original design form.
- the pump head is a rather complex component consisting of a plurality of relatively movable / rotating parts (as already indicated above), which actually would not have to be replaced because it is not contaminated directly from the fluid. Therefore, it is much cheaper to provide only the tube as a disposable item. For its replacement, however, the hose must be withdrawn from the pump head or reared, whereby a biasing force must be overcome, with which the hose is stretched around the pump head. In order to facilitate changing only the hose (with the pump head remaining), therefore, a special clamping mechanism has been developed by means of which the hose can be tensioned and tensioned for a change operation.
- the G 94 11 183 discloses a simple construction of such a clamping device. Accordingly, the hose is provided with two axially spaced bead-like stops / brackets, whereas the pump housing within the hose receiving compartment formed or inserted therein is provided with a cross bar or beams as a hose seat in which two notches are formed.
- the one bead-shaped stop is engaged in the one notch / hooked and then pulled the hose around the pump head. Finally, the other bead-shaped stop is engaged / hooked in the other notch. This insertion process is very time consuming and complicated because the stops must be hooked under tension of the hose in the notches, which requires some skill and strength on the part of an operator.
- a driving bar as a hose receiving, which is firmly connected at its two axial ends to the hose at two axially spaced hose sections, such that the hose (hose center section) forms a loop between the beam ends.
- the bar and hose form a separate, exchangeable hose unit.
- the tube thus formed is now placed / guided with its loop area over the pump head and the driving bar locked in a jig.
- the tensioning device preferably provides a guide rail / groove for the driving bar, along which the driving bar is moved under tensioning of the loop area until it engages in a releasable holder / latching within the hose receiving compartment.
- US 2007/020130 A1 a peristaltic pump having a removable carrier with a deformable cylindrical portion against which a flexible tube is forced by rollers, the carrier having to be removed to replace the tube.
- WO 2004/044425 A1 describes a peristaltic pump, wherein a contact surface, which is part of the pump housing, can be pressed by a lever against a hose resting against rollers.
- a peristaltic pump of the present type which has increased functionality.
- One goal is to facilitate the insertion process for a hose or for a hose unit, in particular the one-way design.
- Another goal is to improve the safety of the peristaltic pump.
- a basic idea of the invention therefore consists in equipping the peristaltic pump with a hose receiving compartment, into which the hose can be inserted almost without tension.
- the peristaltic pump has a hose tensioning device with a preferably manually or electromotively operable lever mechanism to tension the hose over a predetermined peripheral portion around the rotating (fixed) pump head of the peristaltic pump.
- lever mechanism a variety of structural configurations are conceivable, with the aid of an actuating movement with a corresponding reduction on the hose / the hose unit is transferable, such as a worm gear, a pulley a gear transmission or the like tools.
- the lever mechanism it is advantageous to form the lever mechanism conventionally in the form of an actuating element (handle) hinged to the hose pump, which is coupled (actively connected) to a sliding force-transmitting, displaceable component or plunger component which generates an actuation force generated by pivoting
- actuating element handle hinged to the hose pump
- a sliding force-transmitting, displaceable component or plunger component which generates an actuation force generated by pivoting
- it transfers to the handle at the handle in a stout manner to the hose Such a concept for the lever mechanism is easy to produce, reliable and therefore economical.
- a medical peristaltic pump having a pump housing in which a tubing receptacle is formed or received, in which a pump head / pump rotor is rotatably accommodated (preferably stationary) and with a tubing unit so inserted into the tubing receptacle.
- the tension (also pulling force) with which the hose is to be applied or applied to the pump head is applied by a pull / tension device arranged on the pump housing (ie provided as a fixed component of the peristaltic pump) which interacts with the hose unit or the pump head. so that during their (manual / motor) actuation of the hose is clamped around the pump head.
- the clamping device has a permanently installed on the pump housing and thus not to be regarded as a tool lever mechanism.
- a hose or a hose unit can be easily inserted and tensioned by each person. Also, the removal of a hose or hose unit is done simply by the bias of the hose around the pump head released via the lever mechanism and then removed the hose / hose unit from the hose receiving compartment virtually free of forces becomes. Since the lever mechanism is part of the peristaltic pump, this is not changed every time, so that the operation of the peristaltic pump remains inexpensive.
- the hose unit is preferably formed as a replacement component accordingly from the flexible hose and a bar-like hose holder, which holds the hose at two hose - longitudinally spaced positions (to form a hose loop).
- the tensioning device arranged on the pump housing or on the hose receiving compartment is provided in the form of the lever mechanism for displacing preferably the hose holder (or the pump head) with at least one lever element (actuating element or plunger component as defined above), to which a clamping device or a an undercut forming latching device is provided which, upon reaching a hose tensioning position, engages a counterclamping / latching device disposed on the hose support of the (replaceable hose unit) for locking the hose support and the tensioning device into its hose tensioning position.
- a lifting element (actuating element of the lever mechanism) is pivoted (preferably folded in the direction of the hose receiving compartment) for clamping the hose around the pump head.
- this pivoting movement of the one lever element is converted by the entire lever mechanism into a displacement movement preferably of the hose holder (or of the pump head) in the hose tensioning direction.
- the tube holder (or the pump head) is also displaced to the maximum and the tube is clamped at most around the pump head.
- the clamping / locking device comes on the part of the lever member with the counter clamping / - locking device on the part of the hose holder into engagement and prevents or prevents inadvertent pivoting of the lever element and / or a displacement of the hose holder (in the case of a fixed pump head) itself when the lever mechanism becomes defective at one point. This increases the safety of the peristaltic pump.
- a lever element of the lever mechanism at the same time also has a protective cap for the at least partial (front) cover of the tube receiving compartment.
- the hose receiving compartment is opened or closed at the same time (automatically) by pressing the tensioning device, thus protecting the moving parts therein, such as the pump head or the hose, from the outside. This also increases the safety of the peristaltic pump.
- the protective cap either forms or is fixed to the lever element, which is provided as a handle (actuating element) of the lever mechanism or forms or is fixed to the lever element (plunger element), which via the handle for transmitting leverage can be actuated on the hose holder.
- the lever mechanism according to the invention has an actuating element or a handle which is directly or indirectly hinged to the pump housing and a plunger element, which is operatively connected to the lever for power transmission.
- the protective cap can therefore be assigned to either the handle or the plunger element.
- the handle at the same time has or is the protective cap
- this may have the shape of a cover plate.
- the handle may be in the form of a bow handle, a buckle / operating button, a toggle lever or the like ergonomic shape.
- a hose receptacle (Einhlindbauteil) may be preferably provided as part of the lever mechanism, which is slidably disposed or can be arranged in or on the hose receiving compartment and in which the hose via the formed or fixed thereto hose holder can be inserted or inserted /.
- the lever mechanism preferably acts on the tube retainer as a further element of the lever mechanism to move relative to the stationary (non-displaceable) pump head (thereby carrying the tube retainer) such that the free (loop-shaped) hose center section abuts the pump head in a spanning manner.
- the tube center section in inserted, unstressed condition can also be almost straight or already pre-cut.
- lever mechanism is designed to be self-locking in addition to the latching / mating latching device, i. when the handle pivots during their actuation to tension the hose over a kind of dead center and then almost automatically works / snaps into its end clamping position.
- a hose unit for a peristaltic pump according to the invention (separate from the hose pump according to the invention preferably designed as a one-way component) consisting of a bar-like hose holder (engagement device), which the flexible, preferably elastic hose holds on two axially spaced positions and is firmly connected to these positions with the hose and thereby forms at least one undercut, which can be brought into holding engagement with the hose receptacle of the peristaltic pump or the tensioning device of the peristaltic pump.
- the hose unit can be produced very inexpensively due to the few components and is therefore particularly suitable as a one-way item.
- a transversely projecting tab is formed on the hose holder, which for manual handling of the hose assembly during installation / removal process and preferably adapted as a detent of the tensioning device / the lever mechanism in the hose - clamping position. This facilitates the handling of the hose unit.
- the tensioning device counter-latching element (tab) is changed on the part of the hose unit with each replacement.
- the counter-locking element can be made from a low-cost material (together with the hose holder) as a one-way article, since no consideration has to be taken of its durability.
- a hose receiving compartment 1 of a peristaltic pump according to the Fig. 8 shown in detail, which is equipped with a clamping device with lever mechanism 2.
- the hose pump of the invention has basically a pump housing 4, on the front side in this case, the tube receiving compartment 1 is arranged, such that it opens to the front of the pump housing 4 out.
- a pump head 6 consisting of a motor-driven, rotatable drive wheel, on the radial outer circumference of a number of pressure wheels / rollers (not shown) are relatively rotatably mounted, which are distributed at equal circumferential distances from each other.
- a control panel 8 which is also placed on the front of the pump housing 4, serves to program a control at least for the electric drive of the pump head, for example, to adjust the speed or on and off times of the peristaltic pump.
- on and off buttons are arranged on the front side of the pump housing.
- the tube receiving compartment 1 is formed in the form of a substantially rectangular shell or depression, which is either manufactured in one piece with the pump housing 4 or is used as a separate component in a corresponding section of the pump housing 4.
- a notch 12 are each prepared, which serve as a tube receptacles and in which a hose or a hose unit 14 can be used.
- the notches 12 are aligned with each other for this purpose, such that their alignment line arranged radially offset to the pump head 6.
- this lever mechanism On a side parallel to the line of flight of the tube receiving compartment 1, the clamping device with lever mechanism 2 is mounted on the pump housing 4.
- this lever mechanism consists of a handle 16 hinged pivotably on the pump housing 4 in the form of a handle bar, which is operatively connected to a push element (plunger component) 18 via a joint (not shown), a spring device or a toothed gear.
- the pusher element 18 has in plan view according to of the Fig. 1 a substantially rectangular plate shape, the size of which is sufficient to cover the tube receiving compartment 1 as far as possible or even completely.
- the thrust element 18 is further connected to the axis of rotation of the pump head 6 and forms in the present case a bearing for the axis of rotation.
- the thrust element 18 may consist of two parallel spaced plates, which are fixed to each other and between which the pump head is rotatably supported.
- the drive motor for the pump head 6 (not further shown) is also attached to the pusher element 18.
- the thrust element 18 is displaceably guided on the pump housing 4 such that it can not be lifted off the pump housing 4.
- the mounting of the pump head 6 is further selected so that the pump head 6 projects beyond the thrust element 18 on the plate edge of the thrust element 18, which faces the alignment line.
- hose unit 14 can be seen, which is provided according to the invention as a hose pump separate component and optionally in the hose receiving compartment 1 can be used.
- the hose unit 14 therefore consists of a flexible, preferably elastically deformable (stretchable in the tube longitudinal direction) tube 20 to which two brackets or engagement elements 22 are attached or formed at an axial distance from each other, which represent a total of the hose holder of the hose unit.
- These brackets 22 form radial circumferential projections or collars, which can be brought into undercut engagement with the notches 12 on the hose receiving compartment 1.
- the axial spacing of the brackets 22 is selected so that when the tube 20 is inserted into the two notches 12 so that the brackets 22 engage the tubing receptacle 1 behind the notches 12, the mid-section tube 20a extending therebetween will not or only slightly stretched, which essentially follows the line of flight.
- the tube receiving compartment 1 is partially covered with a fixed plate 24, wherein the fixed Plate 24 has an inner protrusion 24a, in which that part of the pump head 6, which protrudes from the plate-shaped thrust element 18 in the direction of alignment, dips when retracting the tube receiving compartment 1 and retracts.
- the tube receiving compartment 1 is opened by the bow-shaped handle 16 according to the Fig. 1 is manually opened to the left, whereby the plate-shaped thrust element 18 together with the pump head 6 via the lever mechanism to the left, that is moved away from the alignment line.
- the hose unit 14 can now be inserted into the notches 12 as described above without any effort and thus easy.
- the bow-shaped handle 16 is manually folded in the direction of alignment, this folding or pivoting movement is transmitted via the lever mechanism with a corresponding reduction on the plate-shaped thrust element 18 for its displacement. That is, with / by pivoting the handle 16 in the direction of line of flight, the plate-shaped thrust element 18 is pushed toward the fixed plate 24 forward, at the same time the rotatably mounted pump head 6 is pressed against the tube center portion 20a and advanced.
- the pump head 6 Since the sliding path of the pusher 18 to hit with the fixed plate 24 is greater than the distance between the inserted tube 20 and the pump head 6 in the fully open state, the pump head 6 is thus pressed through the tube 20 quasi through, wherein the hose center section 20a between the brackets 22 / notches 12 around the pump head 6 is stretched over a partial circumference of this.
- the hose center portion 20a In the fully closed state of the tube receiving compartment 1 according to the left illustration in Fig. 1 Accordingly, the hose center portion 20a is U-shaped elastically deformed, resulting in a predetermined application force between the pump head 6 and hose 20.
- the lever mechanism according to the first embodiment of the invention is equipped with a kind of self-locking, which holds the handle 16 automatically, without additional locking elements, in its tensioned end position.
- FIGS. 2 and 3 show alternative embodiments of the clamping device 2 according to the Fig. 1 , wherein only the technical differences to the first embodiment is to be discussed below, while all other technical features substantially correspond to the first embodiment.
- FIGS. 2 and 3 differ from the first embodiment according to the Fig. 1 in the embodiment of the manually operable handle 16.
- the handle 16 is formed as a kind of strip-shaped buckle
- the plate-shaped pushing element 18 in the right-hand illustration in FIG Fig. 2 is formed on the upper side with a longitudinal groove 26 in the sliding direction of the thrust element 18, which faces the buckle 16.
- the fixed plate 24 is formed with a corresponding longitudinal groove 28 which is aligned with the longitudinal groove 26 in the thrust element 18.
- the longitudinal groove (s) 24, 26 is (are) dimensioned so that the buckle 16 when folded in its exciting end position according to the left illustration in Fig. 2 into the groove (s) 24, 26 einschwenkt and almost completely absorbed therein. This results in a substantially smooth, edge-free top of the plate-shaped thrust element 18 and the fixed plate 24, so that a mecanicdliches opening the buckle 16, for example, as a result of it getting stuck is avoided. This contributes to the further improvement of the safety of the hose pump according to the invention.
- the handle 16 according to the right representation in Fig. 3 also consist of a plate-shaped flap, which after folding in its tensioned end position (see left illustration in Fig. 3 the tube receiving compartment 1 is preferably completely covered, including the fixed plate 24.
- the handle 16 is in the form of a toggle lever.
- the toggle lever 16 is hinged to the hose receiving compartment 1 or the pump housing 4, that extends the pivot axis perpendicular to the front side of the pump housing 4 and thus perpendicular to the top of the plate-shaped thrust element 18.
- the toggle lever 16 is formed with an eccentric or a cam 16a, which presses against the thrust element 18 when the lever 16 is turned and displaces it in the closing direction against the inserted tube 20.
- toggle lever 16 Since the toggle lever 16 has no coupling with the pusher member 18, but only applies against the rear edge 18 a, a not shown spring (- sensible) is provided, which the thrust element 18 in the opening direction (relaxed end position according to the right representation in FIG Fig. 4 ).
- the knee lever 16 is also positioned so that it reaches its tensioned end position (see left illustration in FIG Fig. 4 ) has exceeded a (top) dead center of the cam 16a and is thus automatically held in this position.
- the Fig. 5 shows a fifth embodiment of the invention as a simple construction for implementing the aforementioned alternative clamping principle.
- the pump head 6 is in accordance with Fig. 5 , Left view rotatably mounted in the hose receiving compartment 1 (stationary) and is driven by a motor not shown within the pump housing 4.
- the tube receiving compartment 1 is thereby guided around the pump head 6 in a semicircular shape, whereby a kind of U-shaped receiving shaft or groove 1 a is formed between the tube receiving compartment 1 and the pump head 6.
- a bar-shaped receptacle 30 is mounted in the tube receiving compartment 1, such that the substantially tangential to the pump head 6 aligned beam 30 is displaceable in its transverse direction.
- a in the sliding direction of the beam 30 extending longitudinal slot 32 is worked out in the hose receiving compartment 1, through which a lever-shaped handle 16 extends therethrough, which is formed at its free projecting end to a key.
- the handle 16 is pivotally mounted at its other, not visible end in the pump housing 4.
- this has a not shown in detail driving element, which is in operative engagement with the bar-shaped receptacle 30 to transform a pivotal movement of the handle 16 with a corresponding reduction of the lever mechanism thus produced in a sliding movement of the beam 30.
- the hose unit 14 also has two axially spaced collar-shaped brackets 22 which are engageable with notches 12 in the movable bar-shaped receptacle 30 in undercut engagement.
- the axial distance between the two brackets 22 along the tube 20 is so large that the tube center portion 20a between the brackets 22 bulges out into a U-shaped loop when the brackets 22 and the tube 20 in the bar-shaped hose receptacle 30 at the notches 12 inserted / inserted.
- the loop in this case has a mean radius which corresponds approximately to the U-shaped receiving shaft 1a around the pump head 6 around, so that the tube center portion 20a can be placed around the pump head 6 almost without effort in an untensioned state.
- the handle 16 is actuated, ie in the present case pivoted away from the pump head 6 and thus the beam-shaped receptacle 30 is pushed away from the pump head 6.
- the hose center portion 20a applies with a predefined clamping force to the partial circumference of the pump head 6, as shown in the right-hand illustration of Fig. 5 is shown.
- the handle 16 according to the fifth preferred embodiment of the invention is dimensioned so that this shortly before reaching its exciting end position (see right representation in FIG Fig. 5 ) exceeds a dead center, whereupon the clamping force of the tube 20 holds the handle 16 in this exciting end position.
- the fifth embodiment of the invention according to the Fig. 5 has a comparatively simple mechanical structure, since the pump head 6 can be held stationary and only the (preferably bar-shaped) receptacle 30 relative to the pump head 6 must be displaced. Thus, this construction is inexpensive to produce. Meanwhile, in this solution, even in the tensioned end position of the handle 16, the rotating parts are exposed.
- the sixth embodiment of the invention according to the left-hand illustration in FIG Fig. 6 in contrast to the fifth preferred embodiment, a modified handle 16 before.
- the button described above is replaced by a plate-shaped flap, which is articulated via a hinge, not shown, on the pump housing 4 and via a kind of plunger member 34 with the bar-shaped receptacle 30 is operatively connected.
- the plunger member may in the present case consist of a rod frame, which at a certain middle position to achieve a lever effect on the pivotable flap 16 and on the receptacle 30 is hinged.
- the plunger member 34 may comprise two laterally slidably mounted on the tube receiving compartment 1 push rods which are coupled via a lever or gear mechanism with the handle 16 to transform a pivotal movement of the handle 16 in a sliding movement of the push rods to transform.
- the operation of the hose receiving compartment 1 and, in particular, the lever mechanism 2 tensioning device 2 according to the sixth embodiment of the invention is substantially the same as the fifth embodiment. That is, the pivoting movement of the plate-shaped flap 16 is transformed via the plunger member 34 in a sliding movement of the bar-shaped receptacle 30, but at the same time for tensioning the hose unit 14 (see middle illustration of Fig. 6 ) the flap-like handle 16, the tube receiving compartment 1 with reaching the exciting end position according to the right representation in Fig. 6 essentially completely covering. Also in this case, the clamping device 2 is provided with a self-locking, as has already been described above with reference to the fifth embodiment.
- the handle / actuator can not necessarily be operated manually but also by motor.
- Such an engine can basically be used in all embodiments already described in order to apply an actuating force to the handle / actuating element, for example via a toothed gear or a piston.
- the use of a motor drive also allows a modification of the clamping device, as described below with reference to the seventh preferred embodiment according to the Fig. 7 , middle illustration is described.
- the cover plate 16 has a receptacle for the hose unit 14 on consisting of two spaced notches 12 which are aligned with each other and into which the hose unit 14 can be inserted in an undercut manner by means of holders / engagement elements 22 fixed thereto (see the right-hand illustration in FIG Fig. 7 ).
- the distance between the two brackets 22 is selected so that the tube 20 in the inserted but still unstressed state substantially follows the alignment line between the notches 12.
- the drive is presently formed by an electric motor, not shown, which is operatively connected via a lever mechanism consisting of eccentric / cam and plunger member with the cover plate 16.
- a lever mechanism consisting of eccentric / cam and plunger member with the cover plate 16.
- other constructions for a lever mechanism such as a gear transmission are conceivable.
- the tensioning device 2 according to the invention in the form of the lever mechanism, in this case for displacing the hose holder 14 and the hose receptacle 30, shown in more detail in the perspective.
- the clamping device is shown in the open position.
- the lever mechanism may possibly also be provided for the displacement of the pump head instead of the hose holder.
- the actuating element of the lever mechanism is pivotally mounted on the hose receiving compartment / pump housing protective cap or 16 (could also be a swivel bracket), with which at the same time the hose receiving compartment 1 in the hose - clamping position front side (at least partially) is covered / is.
- a clamping or locking device 40 is preferably arranged in the form of a spring clamping / snapping device, which can further preferably form an undercut acting in opening-movement direction of the actuating element 16.
- the clamping / detent device 40 on one side of the protective flap 16 of the lever mechanism has two strip-shaped, mutually parallel projections 42 which project from the back of the protective flap 16 in the direction of the tube receiving compartment 1 and between them a clamping or latching gap (Groove) 44 train.
- the projections 22 may be formed substantially without a surface structure (exclusively to achieve a clamping action) or they have at their respective free (front) edge at least one undercut approximately in the form of a bead (clamping and / or locking action).
- the clamping / locking device 40 may also be otherwise designed, such as in the form of a mushroom-shaped base or the like pressure / locking buttons.
- the protective flap 16 are in accordance with the Fig. 9 hinged on both sides of the two plunger 34, the free ends of which are hinged to the relative to the rotatable pump head 6 slidably mounted in the hose receiving compartment 1 tube receptacle 30. In this way, a pivoting movement of the protective flap 16 is transmitted via the two plungers 34 with a specific lever ratio to the hose receptacle 30 (part of the lever mechanism) to the displacement relative to the pump rotor / pump head 6.
- the tube receptacle 30 is in the form of a bar or Rahmes formed with a driver / latching hook 46 which projects transversely to the direction of displacement at a central portion of the frame 30.
- the sliding path of the frame 30 in the hose tensioning direction is limited by a stop or abutment projection 48 which protrudes in the hose receiving compartment 1 from the rear wall of tab or tongue-shaped in the receiving compartment space and thus according to Fig. 9 is arranged below the frame 30 (hose receptacle) seen in the hose tensioning direction.
- the (separate) hose unit 14 comprises the flexible / elastic hose (20) and the hose holder (22), which is bar-shaped in this case and at their free ends in each case a connection nipple 50, to which the two hose ends are shot to form a hose loop. Furthermore, the two connection nipples 50 also form a connection possibility for two external connection hoses (not shown further).
- a transversely projecting tab 52 is formed, which initially serves as a handle (handle) for easy installation and removal of the hose unit 14 in / from the hose receiving compartment 1. However, this tab 52 is arranged so that it projects after insertion of the hose unit 14 in the tube receiving compartment 1 (with partial wrapping of the pump rotor 6) in the direction of receiving tray opening or towards the protective or cover flap 16.
- the tab 52 can either be provided without a surface structure (exclusively to achieve a clamping effect) or with an undercut (to achieve a locking effect), as will be described below.
- a latching edge 54 is formed, which can be locked / locked (clipped) to the catch / latching hook 46 of the frame 30 when the bar-shaped hose holder 22 is inserted into the latching bar or frame-shaped hose receptacle 30. is clipped.
- the hose unit 14 inserted through the front receiving slot opening in the tube receiving compartment 1 by the loop-shaped tube 22 placed around the pump rotor 6 and the bar-shaped tube holder 22 with respect to the pump rotor 6 lower Side of the tube receptacle or the frame 30 is inserted.
- the undercut 54 locks / clips on the side of the hose holder 22 with the driver / latching hook 46 on the side of the frame 30 elastic, so that removal of the tube holder 22 from the frame 30 is difficult to overcome the elastic latching allows.
- the frame 30 is moved over the lever mechanism in the hose tensioning direction, presses the driver / latching hook 46 on the hose holder 22 to guide this.
- the loop-shaped tube 20 is guided past on both sides of the driver hook 46 in this direction toward the pump rotor 6, as in particular in the Fig. 9 is shown.
- the cover flap 16 as an actuating element for tensioning the tube 20 and for closing the receiving compartment 1 folded (see Fig. 10 ), At the same time the frame 30 is moved with entrainment of the bar-shaped hose holder 22 in the hose tensioning direction and the hose 20 elastically tensioned around the pump rotor 6 (in the longitudinal direction stretched).
- the tab 52 Upon reaching the maximum hose clamping position of the cover 16, the tab 52 is inserted on the hose holder 22 in the gap 44 between the clamping / locking strips 42 on the side of the cover 16 and clamped therein and / or locked. At the same time, the tube holder 22 strikes against the stop projection 48 of the receiving compartment 1 or comes to lie in the immediate vicinity of the stop projection 48, such that further advancement of the tube holder 14 in the direction of tube tensioning (substantially) is prevented.
- the cover flap 16 is held as an actuator of the lever mechanism / the clamping device in the maximum hose tensioning position (closed position) of the tab 52 on the hose holder 22 (against unfolding), which for this purpose with the clamping / locking device 40 at the back of Cover flap 16 is engaged.
- the hose holder 22 in turn is the driver / latching hook 46 on the Hose receptacle / the frame 30 (part of the lever mechanism) held in a latching manner.
- the stop projection 48 is provided which prevents further displacement of the tube holder 22 (away from the driver / latching hook 48) in maximum tube tensioning device or even the tube holder 22 against the driver / latching hook 48 presses.
- the present invention relates to a peristaltic pump for medical purposes with a pump housing, in which a tube receiving compartment 1 is formed / inserted, in which a pump head 6 is rotatably mounted and with a (separate) hose unit 14, the so inserted / inserted into the tube receiving compartment 1 is that a hose 22 of the hose unit 14 comes with the pump head 6 in this at least partially spanning engagement.
- a tensioning device is arranged on the pump housing or hose receiving compartment 1, which cooperates with the hose unit 14 or the pump head 6 to tension the hose 20 around the pump head 6 when actuated.
- the tensioning device has a lever mechanism, wherein preferably a lever element 16 of the lever mechanism at the same time forms or has a protective cap for at least partially covering the hose receptacle 30 / of the hose receiving compartment 1.
- a lever element preferably the protective / cover flap
- also has a clamping / locking device 40 in the maximum Hose tensioning position cooperates with a counter clamping / - latching device 52 on the hose unit 14, to prevent or prevent inadvertent release of the hose 20.
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Description
Die vorliegende Erfindung betrifft eine Schlauchpumpe und insbesondere eine in/an einem Schlauchaufnahmefach der Schlauch- bzw. Rollerpumpe (Quetschpumpe) angeordnete Spannvorrichtung zur Zugbeaufschlagung eines in den Schacht einsetzbaren Schlauchs vorzugsweise der Ein-Weg-Bauart.The present invention relates to a peristaltic pump and more particularly to a tensioning device arranged in / on a hose receiving compartment of the hose or roller pump (squeeze pump) for applying a hose which can be inserted into the shaft, preferably of the one-way design.
Roller- oder Schlauch-(quetsch-)pumpen sind Verdrängungspumpen, bei denen das zu fördernde Medium durch elastische äußere mechanische Verformung eines Schlauchs durch diesen hindurchgedrückt wird. Aufgrund der schonenden Förderung des Mediums (ohne dieses zu scheren oder zu verwirbeln) werden Schlauchpumpen insbesondere auch zu medizinischen Zwecken eingesetzt.Roller or hose (squeeze) pumps are positive displacement pumps in which the medium to be pumped is forced through it by elastic external mechanical deformation of a hose. Due to the gentle promotion of the medium (without this to shear or swirl) peristaltic pumps are used in particular for medical purposes.
In das Gehäuse einer gattungsgemäßen Schlauchpumpe ist prinzipiell ein flexibler/elastisch deformierbarer Schlauch so eingesetzt, dass er um einen rotierbaren Pumpenkopf über einen vorbestimmten Umfangsabschnitt geführt ist, an dem eine Anzahl von winkelbeabstandeten Rollen drehbar gelagert sind, die bei entsprechender Rotation des Pumpenkopfs mit dem Schlauch sequenziell in Wälzeingriff gebracht werden und diesen zusammendrücken/abklemmen. Der Schlauch stützt sich hierbei entweder außenseitig am Pumpengehäuse ab oder er ist mit einer vorbestimmten Zugkraft um und gegen den Pumpenkopf gespannt.In the housing of a generic peristaltic pump in principle a flexible / elastically deformable hose is inserted so that it is guided around a rotatable pump head over a predetermined peripheral portion on which a number of angularly spaced rollers are rotatably mounted, with appropriate rotation of the pump head with the hose be sequentially grooved and squeezed / clamped. The hose is supported either on the outside of the pump housing or he is stretched with a predetermined tensile force around and against the pump head.
Bei jeder Bauart führt die Bewegung des Pumpenkopfs jedoch dazu, dass sich die jeweilige Abklemmstelle einer gerade eingreifenden Rolle entlang des Schlauchs vorwärts bewegt und dadurch das Fördermedium innerhalb des der betreffenden Rolle unmittelbar vorauseilenden Schlauchabschnitts vorantreibt. Das Erzeugen des Ansaugunterdrucks in dem der betreffenden Rolle unmittelbar nacheilenden Schlauchabschnitt wird in der Regel durch die Eigenelastizität des Schlauchmaterials erzeugt, aufgrund derer der Schlauch seine ursprüngliche Konstruktionsform wiederzuerlangen versucht.In any design, however, the movement of the pump head causes the respective Abklemmstelle a straight meshing roller along the tube moves forward, thereby driving the fluid within the roller directly ahead of the hose section. The generation of the intake negative pressure in the hose section directly following the relevant roller is generally generated by the inherent elasticity of the hose material, as a result of which the hose tries to regain its original design form.
Aufgrund zunehmend strengeren Hygienebestimmungen sowie anspruchsvolleren Anwenderwünschen ist es üblich geworden, zumindest jene Bestandteile einer Schlauchpumpe insbesondere bei deren medizinischem Einsatz als Ein-Weg-Artikel auszubilden, die unmittelbar mit dem Fördermedium in Kontakt kommen. Hierzu zählt in erster Linie der Schlauch, der demzufolge möglichst einfach ausbau- und einsetzbar sein muss. Aus dem Stand der Technik sind hierfür ein Vielzahl von Schlaucheinheiten und Spannvorrichtungen bekannt, von denen nachfolgend einige genannt werden sollen:
Prinzipiell besteht die Möglichkeit, den Schlauch sowie den Pumpenkopf in einer Art Patrone als separate Schlaucheinheit vorzumontieren, die bei einem Auswechselvorgang lediglich in das Gehäuse der Schlauchpumpe eingesetzt/eingerastet werden muss, derart, dass der Pumpenkopf mit einer Antriebswelle beispielsweise eines Elektromotors oder eines zu diesem nachgeschalteten Getriebes drehfest in Eingriff kommt. Obgleich diese Lösung den Wechselvorgang stark vereinfacht und gleichzeitig auch ein hohe Betriebssicherheit gewährleistet, da die Patrone als eine in sich geschlossene Gehäuseeinheit ausführbar ist, wodurch rotierende Elemente von Außen unzugänglich eingehaust werden, stellt dies eine vergleichsweise teuere Konstruktionsvariante dar.Due to increasingly stringent hygiene regulations and more demanding user wishes, it has become customary to design at least those components of a peristaltic pump, especially in their medical use, as one-way articles which come into direct contact with the pumped medium. These include primarily the hose, which must therefore be as simple as possible to expand and use. For this purpose, a large number of hose units and tensioning devices are known from the prior art, of which a few are to be mentioned below:
In principle, it is possible to preassemble the hose and the pump head in a kind of cartridge as a separate hose unit, which only has to be inserted / locked in a replacement operation in the housing of the peristaltic pump, such that the pump head with a drive shaft such as an electric motor or one to this downstream gear rotatably engaged. Although this solution greatly simplifies the exchange process and at the same time ensures high reliability, since the cartridge is executable as a self-contained housing unit, whereby rotating elements are housed inaccessible from the outside, this represents a relatively expensive design variant.
Der Pumpenkopf ist ein recht komplexes Bauelement bestehend aus einer Mehrzahl von relativ zueinander beweglichen/drehenden Einzelteilen (wie dies vorstehend bereits angedeutet wurde), der eigentlich nicht ausgetauscht werden müsste, da er nicht unmittelbar vom Fördermedium kontaminiert wird. Daher ist es wesentlich kostengünstiger, nur den Schlauch als Ein-Weg-Artikel vorzusehen. Für dessen Austausch muss der Schlauch jedoch vom Pumpenkopf abgezogen bzw. wieder aufgezogen werden, wobei eine Vorspannkraft überwunden werden muss, mit welcher der Schlauch um den Pumpenkopf gespannt ist. Um das Wechseln lediglich des Schlauchs (bei verbleibendem Pumpenkopf) zu erleichtern wurde daher ein spezieller Spannmechanismus entwickelt, mittels dem der Schlauch für einen Wechselvorgang ent- und gespannt werden kann.The pump head is a rather complex component consisting of a plurality of relatively movable / rotating parts (as already indicated above), which actually would not have to be replaced because it is not contaminated directly from the fluid. Therefore, it is much cheaper to provide only the tube as a disposable item. For its replacement, however, the hose must be withdrawn from the pump head or reared, whereby a biasing force must be overcome, with which the hose is stretched around the pump head. In order to facilitate changing only the hose (with the pump head remaining), therefore, a special clamping mechanism has been developed by means of which the hose can be tensioned and tensioned for a change operation.
Die G 94 11 183 offenbart eine einfache Konstruktion einer solchen Spannvorrichtung. Demzufolge ist der Schlauch mit zwei axial beabstandeten wulstartigen Anschlägen/Halterungen versehen/ausgebildet, wohingegen das Pumpengehäuse innerhalb des darin ausgeformten oder eingesetzten Schlauchaufnahmefachs mit einer Querleiste oder Balken als Schlauchaufnahme versehen ist, in der zwei Einkerbungen ausgeformt sind. Um nunmehr den Schlauch in der Schlauchaufnahme einzusetzen, wird der eine wulstförmige Anschlag in die eine Kerbe eingerastet/eingehakt und anschließend der Schlauch um den Pumpenkopf gezogen. Abschließend wird der andere wulstförmige Anschlag in die andere Kerbe eingerastet/eingehakt. Dieser Einlegevorgang ist sehr zeitaufwändig und kompliziert, da die Anschläge unter Zugspannung des Schlauchs in die Kerben eingehakt werden müssen, wofür einige Geschicklichkeit und Kraft seitens einer Bedienerperson erforderlich ist.The G 94 11 183 discloses a simple construction of such a clamping device. Accordingly, the hose is provided with two axially spaced bead-like stops / brackets, whereas the pump housing within the hose receiving compartment formed or inserted therein is provided with a cross bar or beams as a hose seat in which two notches are formed. In order to use now the hose in the hose receiving, the one bead-shaped stop is engaged in the one notch / hooked and then pulled the hose around the pump head. Finally, the other bead-shaped stop is engaged / hooked in the other notch. This insertion process is very time consuming and complicated because the stops must be hooked under tension of the hose in the notches, which requires some skill and strength on the part of an operator.
Alternativ hierzu ist es auch möglich, einen Mitnahmebalken als Schlauchaufnahme vorzusehen, der an seinen beiden axialen Enden mit dem Schlauch an zwei axial beabstandeten Schlauchabschnitten fest verbunden ist, derart, dass der Schlauch (Schlauch-Mittenabschnitt) zwischen den Balkenenden eine Schlaufe ausbildet. Balken und Schlauch bilden dabei eine separate, austauschbare Schlaucheinheit.Alternatively, it is also possible to provide a driving bar as a hose receiving, which is firmly connected at its two axial ends to the hose at two axially spaced hose sections, such that the hose (hose center section) forms a loop between the beam ends. The bar and hose form a separate, exchangeable hose unit.
Der so geformte Schlauch wird nunmehr mit seinem Schlaufenbereich über den Pumpenkopf gelegt/geführt und der Mitnahmebalken in eine Spannvorrichtung eingerastet. Die Spannvorrichtung sieht vorzugsweise eine Führungsschiene/-nut für den Mitnahmebalken vor, entlang derer der Mitnahmebalken unter Anspannen des Schlaufenbereichs verschoben wird, bis dieser in eine lösbare Halterung/Verrastung innerhalb des Schlauchaufnahmefachs einrastet. Diese Konstruktion erleichtert zwar den Einlegvorgang des Schlauchs, indessen muss der Schlauch im Bereich der Schlaufe gleichzeitig an zwei Enden des Schlaufenbereichs und damit an zwei bezüglich des Pumpenkopfs sich ausbildenden Flanken gespannt werden, wofür ein größerer Kraftaufwand erforderlich ist, der nicht von jeder Bedienperson aufgebracht werden kann.The tube thus formed is now placed / guided with its loop area over the pump head and the driving bar locked in a jig. The tensioning device preferably provides a guide rail / groove for the driving bar, along which the driving bar is moved under tensioning of the loop area until it engages in a releasable holder / latching within the hose receiving compartment. Although this design facilitates the insertion process of the hose, however, the hose in the region of the loop must be stretched simultaneously at two ends of the loop area and thus on two with respect to the pump head forming flanks, which requires a greater effort, which are not applied by each operator can.
Schließlich erfordert der Austausch lediglich des Schlauchs (und nicht des Pumpenkopfs) einen von Außen freien Zugang auch zu den rotierenden Bauteilen, der entweder aus Kostengründen auch während des Betriebs geöffnet bleibt oder mittels einer zusätzlichen Service-/Schutzklappe zumindest teilweise verschließbar ist. Letzteres verteuert nicht nur die Schlauchpumpe, sondern bildet auch eine Gefahrenquelle insofern, als dass die Klappe in einem zusätzlichen Schritt geschlossen werden muss, was ggf. vergessen werden kann.Finally, replacement of only the hose (and not the pump head) requires outside access to the rotating components as well either for cost reasons remains open during operation or at least partially closed by means of an additional service / protective flap. The latter not only increases the cost of the peristaltic pump, but also forms a source of danger in that the flap must be closed in an additional step, which can possibly be forgotten.
Weiterer Stand der Technik findet sich in
Ferner zeigt
Angesichts der vorstehenden Problematik ist es eine Aufgabe der vorliegenden Erfindung, eine Schlauchpumpe der vorliegenden Gattung bereit zu stellen, die eine erhöhte Funktionalität aufweist. Ein Ziel ist es, den Einlegevorgang für einen Schlauch oder für eine Schlaucheinheit insbesondere der Ein-Weg-Bauart zu erleichtern. Ein anderes Ziel ist es, die Sicherheit der Schlauchpumpe zu verbessern. Schließlich ist es ein Ziel der Erfindung, die Schlauchpumpe und insbesondere die Wechselschlaucheinheit kostengünstig zu halten.In view of the above problem, it is an object of the present invention to provide a peristaltic pump of the present type which has increased functionality. One goal is to facilitate the insertion process for a hose or for a hose unit, in particular the one-way design. Another goal is to improve the safety of the peristaltic pump. Finally, it is an object of the invention to keep the peristaltic pump and in particular the flexible hose unit cost.
Diese vorstehende Aufgabe sowie die weiteren Ziele werden durch eine Schlauchpumpe mit den Merkmalen des Anspruchs 1 gelöst. Vorteilhafte Ausgestaltungen der Erfindung sind Gegenstand zumindest der Unteransprüche.This above object and the other objects are achieved by a peristaltic pump with the features of
Ein Grundgedanke der Erfindung besteht demzufolge darin, die Schlauchpumpe mit einem Schlauchaufnahmefach auszustatten, in welches der Schlauch nahezu ungespannt eingesetzt werden kann. Des Weiteren hat die Schlauchpumpe eine Schlauch-Spannvorrichtung mit einem vorzugsweise manuell oder elektromotorisch betätigbaren Hebelmechanismus, um den Schlauch über einen vorbestimmten Umfangsabschnitt hinweg um den rotierenden (ortsfesten) Pumpenkopf der Schlauchpumpe zu spannen. Durch den Hebelmechanismus kann die zur Erreichung der erforderlichen Spannkraft und damit die Anpresskraft gegen den Pumpenkopf notwendige Betätigungskraft verringert werden, sodass sie einfach manuell aufgebracht werden kann, ohne dass zusätzliches separates Werkzeug erforderlich wäre. Im Fall einer motorischen Betätigung des Hebelmechanismus kann der Antrieb klein und damit kostengünstig dimensioniert werden.A basic idea of the invention therefore consists in equipping the peristaltic pump with a hose receiving compartment, into which the hose can be inserted almost without tension. Furthermore, the peristaltic pump has a hose tensioning device with a preferably manually or electromotively operable lever mechanism to tension the hose over a predetermined peripheral portion around the rotating (fixed) pump head of the peristaltic pump. By the lever mechanism necessary to achieve the required clamping force and thus the contact pressure against the pump head operating force can be reduced so that they can be easily applied manually without additional separate tool would be required. In the case of a motorized actuation of the lever mechanism, the drive can be made small and thus cost-effective.
Grundsätzlich sind als Hebelmechanismen eine Vielzahl von konstruktiven Ausgestaltungen denkbar, mit deren Hilfe eine Betätigungsbewegung mit einer entsprechenden Untersetzung auf den Schlauch/die Schlaucheinheit übertragbar ist, so zum Beispiel ein Schneckengetriebe, ein Flaschenzug ein Zahnradgetriebe oder dergleichen Hilfsmittel. Konkret ist es jedoch vorteilhaft, den Hebelmechanismus insbesondere im Fall einer manuellen Betätigung konventionell in Form eines an der Schlauchpumpe anscharnierten Betätigungselements (Handhabe) auszubilden, das mit einem Schubkraft übertragenden, verschiebbaren Bauteil oder Stößelbauteil gekoppelt (wirkverbunden) ist, welches eine durch Verschwenken erzeugte Betätigungskraft an der Handhabe je nach Kopplungsart/-ort untersetzt auf den Schlauch überträgt. Eine derartige Konzeption für den Hebelmechanismus ist einfach herstellbar, funktionssicher und damit ökonomisch.Basically, as a lever mechanisms a variety of structural configurations are conceivable, with the aid of an actuating movement with a corresponding reduction on the hose / the hose unit is transferable, such as a worm gear, a pulley a gear transmission or the like tools. Concretely, however, it is advantageous to form the lever mechanism conventionally in the form of an actuating element (handle) hinged to the hose pump, which is coupled (actively connected) to a sliding force-transmitting, displaceable component or plunger component which generates an actuation force generated by pivoting Depending on the type of coupling / place, it transfers to the handle at the handle in a stout manner to the hose. Such a concept for the lever mechanism is easy to produce, reliable and therefore economical.
Gemäß einem Aspekt der Erfindung wird folglich eine medizinische Schlauchpumpe vorgeschlagen mit einem Pumpengehäuse, in dem ein Schlauchaufnahmefach ausgebildet oder aufgenommen ist, in welchem ein Pumpenkopf/Pumpenrotor (vorzugsweise ortsfest) drehbar untergebracht ist sowie mit einer Schlaucheinheit, die in das Schlauchaufnahmefach so eingesetzt wird/ist, dass ein Schlauch der Schlaucheinheit mit dem Pumpenkopf in diesen zumindest teilweise umspannenden Eingriff kommt bzw. gebracht werden kann (unter elastischer Längsdehnung des Schlauchs).According to one aspect of the invention, therefore, there is provided a medical peristaltic pump having a pump housing in which a tubing receptacle is formed or received, in which a pump head / pump rotor is rotatably accommodated (preferably stationary) and with a tubing unit so inserted into the tubing receptacle. is that a hose of the hose unit with the pump head in this at least partially spanning engagement comes or can be brought (under elastic longitudinal expansion of the hose).
Die Spannkraft (auch Zugkraft), mit welcher sich der Schlauch am Pumpenkopf anlegt bzw. anlegen soll, wird durch eine am Pumpengehäuse angeordnete (d.h. als fester Bestandteil der Schlauchpumpe vorgesehene) Zug-/Spannvorrichtung aufgebracht, die mit der Schlaucheinheit oder dem Pumpenkopf zusammenwirkt, damit bei deren (manueller/motorischer) Betätigung der Schlauch um den Pumpenkopf gespannt wird. Erfindungsgemäß hat/ist die Spannvorrichtung ein am Pumpengehäuse fest installierter und damit nicht als Werkzeug zu betrachtender Hebelmechanismus.The tension (also pulling force) with which the hose is to be applied or applied to the pump head is applied by a pull / tension device arranged on the pump housing (ie provided as a fixed component of the peristaltic pump) which interacts with the hose unit or the pump head. so that during their (manual / motor) actuation of the hose is clamped around the pump head. According to the invention, the clamping device has a permanently installed on the pump housing and thus not to be regarded as a tool lever mechanism.
Aufgrund dieser Ausbildung kann ein Schlauch bzw. eine Schlaucheinheit von jeder Person einfach eingelegt und gespannt werden. Auch der Ausbau eines Schlauchs bzw. Schlaucheinheit erfolgt einfach, indem die Vorspannung des Schlauchs um den Pumpenkopf über den Hebelmechanismus freigegeben und daraufhin der Schlauch/Schlaucheinheit aus dem Schlauchaufnahmefach quasi kräftefrei entnommen wird. Da der Hebelmechanismus Bestandteil der Schlauchpumpe ist, wird dieser nicht jedes Mal mit gewechselt, sodass der Betrieb der Schlauchpumpe preisgünstig bleibt.Due to this design, a hose or a hose unit can be easily inserted and tensioned by each person. Also, the removal of a hose or hose unit is done simply by the bias of the hose around the pump head released via the lever mechanism and then removed the hose / hose unit from the hose receiving compartment virtually free of forces becomes. Since the lever mechanism is part of the peristaltic pump, this is not changed every time, so that the operation of the peristaltic pump remains inexpensive.
Erfindungsgemäß ist die Schlaucheinheit vorzugsweise als Austauschbauteil demnach gebildet aus dem flexiblen Schlauch und einer balkenartigen Schlauchhalterung, die den Schlauch an zwei Schlauch - längsbeabstandeten Positionen (unter Ausbildung einer Schlauchschlaufe) festhält. Ferner ist die am Pumpengehäuse oder am Schlauchaufnahmefach angeordnete Spannvorrichtung in Form des Hebelmechanismus vorgesehen zum (den Schlauch spannenden) Verschieben vorzugsweise der Schlauchhalterung (oder des Pumpenkopfs) mit zumindest einem Hebelelement (Betätigungselement oder Stößelbauteil gemäß vorstehender Definition), an dem eine Klemmeinrichtung oder eine, eine Hinterschneidung ausbildende Rasteinrichtung vorgesehen ist, die bei Erreichen einer Schlauch - Spannposition mit einer an der Schlauchhalterung der (austauschbaren Schlaucheinheit) angeordneten Gegenklemm-/-rasteinrichtung für ein Verriegeln der Schlauchhalterung und der Spannvorrichtung in deren Schlauch - Spannposition in Eingriff kommt.According to the invention, the hose unit is preferably formed as a replacement component accordingly from the flexible hose and a bar-like hose holder, which holds the hose at two hose - longitudinally spaced positions (to form a hose loop). Furthermore, the tensioning device arranged on the pump housing or on the hose receiving compartment is provided in the form of the lever mechanism for displacing preferably the hose holder (or the pump head) with at least one lever element (actuating element or plunger component as defined above), to which a clamping device or a an undercut forming latching device is provided which, upon reaching a hose tensioning position, engages a counterclamping / latching device disposed on the hose support of the (replaceable hose unit) for locking the hose support and the tensioning device into its hose tensioning position.
In anderen Worten ausgedrückt, wird ein Hebelement (Betätigungselement des Hebelmechanismus) für ein Spannen des Schlauchs um den Pumpenkopf verschwenkt (vorzugsweise in Richtung hin zum Schlauchaufnahmefach umgelegt). Gleichzeitig wird diese Schwenkbewegung des einen Hebelelements durch den gesamten Hebelmechanismus in eine Verschiebebewegung vorzugsweise der Schlauchhalterung (oder des Pumpenkopfs) in Schlauch - Spannrichtung umgesetzt. Sobald das Hebelelement vollständig umgelegt ist, ist auch die Schlauchhalterung (oder der Pumpenkopf) maximal verschoben und der Schlauch maximal um den Pumpenkopf herum angespannt. In dieser Stellung kommt die Klemm-/ Rasteinrichtung seitens des Hebelelements mit der Gegenklemm-/-rasteinrichtung seitens der Schlauchhalterung in Eingriff und be- oder verhindert so ein unabsichtliches Aufschwenken des Hebelements und/oder ein Verschieben der Schlauchhalterung (im Fall eines ortsfesten Pumpenkopfs) selbst dann, wenn der Hebelmechanismus an einer Stelle defekt wird. Dies steigert die Sicherheit der Schlauchpumpe.In other words, a lifting element (actuating element of the lever mechanism) is pivoted (preferably folded in the direction of the hose receiving compartment) for clamping the hose around the pump head. At the same time, this pivoting movement of the one lever element is converted by the entire lever mechanism into a displacement movement preferably of the hose holder (or of the pump head) in the hose tensioning direction. As soon as the lever element is completely folded over, the tube holder (or the pump head) is also displaced to the maximum and the tube is clamped at most around the pump head. In this position, the clamping / locking device comes on the part of the lever member with the counter clamping / - locking device on the part of the hose holder into engagement and prevents or prevents inadvertent pivoting of the lever element and / or a displacement of the hose holder (in the case of a fixed pump head) itself when the lever mechanism becomes defective at one point. This increases the safety of the peristaltic pump.
Vorzugsweise ist/hat ein Hebelelement des Hebelmechanismus gleichzeitig auch eine Schutzkappe zur zumindest teilweisen (vorderseitigen) Abdeckung des Schlauchaufnahmefachs. Dadurch wird mit Betätigen der Spannvorrichtung gleichzeitig (automatisch) das Schlauchaufnahmefach geöffnet bzw. geschlossen und damit die darin befindlichen beweglichen Teile wie der Pumpenkopf oder der Schlauch nach Außen geschützt. Dies steigert ebenfalls die Sicherheit der Schlauchpumpe.Preferably, a lever element of the lever mechanism at the same time also has a protective cap for the at least partial (front) cover of the tube receiving compartment. As a result, the hose receiving compartment is opened or closed at the same time (automatically) by pressing the tensioning device, thus protecting the moving parts therein, such as the pump head or the hose, from the outside. This also increases the safety of the peristaltic pump.
Ein anderer Aspekt der Erfindung kann vorsehen, dass die Schutzkappe entweder jenes Hebelelement bildet oder an diesem fixiert ist, das als Handhabe (Betätigungselement) des Hebelmechanismus vorgesehen ist oder jenes Hebelelement (Stößelelement) bildet oder an diesem fixiert ist, welches über die Handhabe zur Hebelkraftübertragung auf die Schlauchhalterung betätigbar ist. Wie eingangs bereits ausgeführt wurde, hat der erfindungsgemäße Hebelmechanismus ein Betätigungselement oder eine Handhabe, das am Pumpengehäuse direkt oder indirekt anscharniert ist und ein Stößelelement, das für eine Kraftübertragung mit dem Hebel wirkverbunden ist. Die Schutzkappe kann demzufolge entweder der Handhabe oder dem Stößelelement zugeordnet sein.Another aspect of the invention may provide that the protective cap either forms or is fixed to the lever element, which is provided as a handle (actuating element) of the lever mechanism or forms or is fixed to the lever element (plunger element), which via the handle for transmitting leverage can be actuated on the hose holder. As already stated, the lever mechanism according to the invention has an actuating element or a handle which is directly or indirectly hinged to the pump housing and a plunger element, which is operatively connected to the lever for power transmission. The protective cap can therefore be assigned to either the handle or the plunger element.
Für den Fall, dass die Handhabe gleichzeitig die Schutzkappe hat oder ist, kann diese die Form einer Abdeckplatte aufweisen. Für den Fall, dass das Kraftübertragungs-Hebelelement (Stößelelement) die Schutzkappe hat oder ist, kann die Handhabe die Form eines Bügelgriffs, einer Schnalle/Betätigungstaste, eines Kniehebel oder dergleichen ergonomische Gestalt haben. Da demzufolge Schutzfunktion und Betätigungsfunktion unterschiedlichen Elementen des Hebelmechanismus zugeordnet sind, können diese ohne Kompromisse optimal an deren verbleibende Funktion konstruktiv angepasst werden.In the event that the handle at the same time has or is the protective cap, this may have the shape of a cover plate. In the event that the power transmission lever member (plunger member) has or is the protective cap, the handle may be in the form of a bow handle, a buckle / operating button, a toggle lever or the like ergonomic shape. As a result, since the protective function and the actuating function are assigned to different elements of the lever mechanism, they can be optimally adapted to their remaining function without compromise.
Gemäß einem anderen Aspekt der Erfindung kann eine Schlauchaufnahme (Einhängbauteil) vorzugsweise als Bestandteil des Hebelmechanismus vorgesehen sein, die verschiebbar im oder am Schlauchaufnahmefach angeordnet oder anordenbar ist und in die der Schlauch über die daran ausgebildete oder fixierte Schlauchhalterung einsetzbar oder eingesetzt/eingehängt ist.According to another aspect of the invention, a hose receptacle (Einhängbauteil) may be preferably provided as part of the lever mechanism, which is slidably disposed or can be arranged in or on the hose receiving compartment and in which the hose via the formed or fixed thereto hose holder can be inserted or inserted /.
Im bevorzugten Fall der verschiebbaren Schlauchaufnahme ist es in vorteilhafter Weise vorgesehen, dass der Hebelmechanismus auf die Schlauchaufnahme vorzugsweise als weiteres Element des Hebelmechanismus einwirkt, um diese relativ zum ortsfesten (nicht verschiebbaren) Pumpenkopf zu bewegen (und dabei die Schlauchhalterung mitnimmt), derart, dass sich der freie (schlaufenförmige) Schlauch-Mittenabschnitt an den Pumpenkopf in umspannender Weise anlegt. Dabei kann der Schlauch-Mittenabschnitt in eingelegtem, unverspannten Zustand auch nahezu gerade oder aber bereits vorgeschlauft sein.In the preferred case of the slidable tube retainer, it is advantageously provided that the lever mechanism preferably acts on the tube retainer as a further element of the lever mechanism to move relative to the stationary (non-displaceable) pump head (thereby carrying the tube retainer) such that the free (loop-shaped) hose center section abuts the pump head in a spanning manner. In this case, the tube center section in inserted, unstressed condition can also be almost straight or already pre-cut.
Vorteilhaft kann es zudem sein, wenn der Hebelmechanismus zusätzlich zur Rast-/ Gegenrasteinrichtung selbsthemmend ausgebildet ist, d.h. wenn die Handhabe bei deren Betätigung zum Spannen des Schlauchs über eine Art Totpunkt schwenkt und dann quasi selbsttätig in ihre End-Spannposition klappt/schnappt.It can also be advantageous if the lever mechanism is designed to be self-locking in addition to the latching / mating latching device, i. when the handle pivots during their actuation to tension the hose over a kind of dead center and then almost automatically works / snaps into its end clamping position.
Auch kann ein Anschlag oder Anschlagsvorsprung vorgesehen sein, der im Schlauchaufnahmefach ausgeformt ist und der bei Erreichen der Schlauch - Spannposition gegen die Schlauchhalterung (oder die Schlauchaufnahme) drückt, um deren weiteres Verschieben in Schlauch - Spannrichtung zu blockieren.It is also possible to provide a stop or stop projection which is formed in the tube receiving compartment and presses against the tube holder (or the tube holder) upon reaching the tube clamping position in order to block its further displacement in the tube tensioning direction.
Schließlich ist es nach einem anderen Aspekt der Erfindung vorgesehen, eine Schlaucheinheit für eine Schlauchpumpe gemäß der Erfindung (getrennt zur erfindungsgemäßen Schlauchpumpe vorzugsweise als Ein-Weg-Bauteil ausgebildet) vorzusehen bestehend aus einer balkenartigen Schlauchhalterung (Eingriffsvorrichtung), welche den flexiblen, vorzugsweise elastischen Schlauch an zwei axial beabstandeten Positionen festhält bzw. an diesen Positionen mit dem Schlauch fest verbunden ist und dabei zumindest eine Hinterschneidung ausbildet, die mit der Schlauchaufnahme der Schlauchpumpe bzw. der Spannvorrichtung der Schlauchpumpe in Halte-Eingriff bringbar ist. Dadurch kann die Schlaucheinheit aufgrund der wenigen Bauteile sehr kostengünstig hergestellt werden und eignet sich daher besonders als Ein-Weg-Artikel.Finally, it is provided according to another aspect of the invention to provide a hose unit for a peristaltic pump according to the invention (separate from the hose pump according to the invention preferably designed as a one-way component) consisting of a bar-like hose holder (engagement device), which the flexible, preferably elastic hose holds on two axially spaced positions and is firmly connected to these positions with the hose and thereby forms at least one undercut, which can be brought into holding engagement with the hose receptacle of the peristaltic pump or the tensioning device of the peristaltic pump. As a result, the hose unit can be produced very inexpensively due to the few components and is therefore particularly suitable as a one-way item.
Des Weiteren ist an der Schlauchhalterung eine quer zu dieser vorragende Lasche ausgeformt, die zur manuellen Handhabung der Schlaucheinheit beim Einbau-/Ausbauvorgang und vorzugsweise als Arretierung der Spannvorrichtung/des Hebelmechanismus in dessen Schlauch - Spannposition angepasst ist. Dadurch erleichtert sich das Handhaben der Schlaucheinheit. Gleichzeitig wird das für ein Arretieren der Spannvorrichtung vorgesehene Gegenrastelement (Lasche) auf Seiten der Schlaucheinheit bei jedem Austausch mit gewechselt. Dadurch kann das Gegenrastelement aus einem preisgünstigen Material (zusammen mit der Schlauchhalterung) als Ein-Weg-Artikel hergestellt werden, da keine Rücksicht auf dessen Haltbarkeit genommen werden muss.Furthermore, a transversely projecting tab is formed on the hose holder, which for manual handling of the hose assembly during installation / removal process and preferably adapted as a detent of the tensioning device / the lever mechanism in the hose - clamping position. This facilitates the handling of the hose unit. At the same time provided for locking the tensioning device counter-latching element (tab) is changed on the part of the hose unit with each replacement. As a result, the counter-locking element can be made from a low-cost material (together with the hose holder) as a one-way article, since no consideration has to be taken of its durability.
Die Erfindung wird nachstehend anhand eines bevorzugten Ausführungsbeispiels unter Bezugnahme auf die begleitenden Figuren näher erläutert.
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Fig. 1 zeigt ein erstes bevorzugtes Ausführungsbeispiel der Erfindung mit einem manuell betätigbaren Hebelmechanismus als Spannvorrichtung mit feststehender Schlauchaufnahme und bügelfömiger Handhabe in offenem (ungespanntem) und geschlossenem (gespanntem) Zustand, -
Fig. 2 zeigt ein zweites bevorzugtes Ausführungsbeispiel der Erfindung mit einem manuell betätigbaren Hebelmechanismus als Spannvorrichtung mit feststehender Schlauchaufnahme und schnallenförmiger Handhabe in offenem (ungespanntem) und geschlossenem (gespanntem) Zustand, -
Fig. 3 zeigt ein drittes bevorzugtes Ausführungsbeispiel der Erfindung mit einem manuell betätigbaren Hebelmechanismus als Spannvorrichtung mit feststehender Schlauchaufnahme und plattenförmiger Handhabe, in offenem (ungespanntem) und geschlossenem (gespanntem) Zustand -
Fig. 4 zeigt ein viertes bevorzugtes Ausführungsbeispiel der Erfindung mit einem manuell betätigbaren Hebelmechanismus als Spannvorrichtung mit feststehender Schlauchaufnahme und kniehebelförmiger Handhabe in offenem (ungespanntem) und geschlossenem (gespanntem) Zustand, -
Fig. 5 zeigt ein fünftes bevorzugtes Ausführungsbeispiel der Erfindung mit einem manuell betätigbaren Hebelmechanismus als Spannvorrichtung mit verschiebbarer/beweglicher Schlauchaufnahme und tastenförmiger Handhabe in ungespanntem und gespanntem Zustand, -
Fig. 6 zeigt ein sechstes bevorzugtes Ausführungsbeispiel der Erfindung mit einem manuell betätigbaren Hebelmechanismus als Spannvorrichtung mit verschiebbarer/beweglicher Schlauchaufnahme und plattenförmiger Handhabe in offenem (ungespanntem) und geschlossenem (gespanntem) Zustand, -
Fig. 7 zeigt ein siebtes bevorzugtes Ausführungsbeispiel der Erfindung mit einem elektromotorisch betätigbaren Hebelmechanismus als Spannvorrichtung mit verschiebbarer/beweglicher Schlauchaufnahme und sowie einem Zahnradgetriebe als Hebelmechanismus zwischen Antriebsmotor und Schlauchaufnahme in offenem (ungespanntem) und geschlossenem (gespanntem) Zustand, -
Fig. 8 zeigt als ein illustratives Beispiel das Gehäuse einer erfindungsgemäßen Schlauchpumpe mit bügelförmiger Handhabe gemäßFig. 1 und insbesondere das Schlauchaufnahmefach in offenem (ungespanntem) Zustand, -
Fig. 9 zeigt die konkrete Ausgestaltung des Hebelmechanismus gemäß der Erfindung vorliegend mit einem Klappenförmigen Hebelelement als Handhabe (Betätigungselement) sowie einem ortsfesten Pumpenrotor und verschiebbarer Schlauchaufnahme als Bestandteil des Hebelmechanismus und mit bereits eingelegter Schlaucheinheit in einer Perspektivendarstellung, -
Fig. 10 die Seitenansicht des Hebelmechanismus mit eingelegter Schlaucheinheit gemäß derFig. 9 in Schlauch - Spannposition (bei geschlossener Front - Klappe), -
Fig. 11 zeigt die Draufsicht einer Separat gefertigten Schlaucheinheit gemäß der Erfindung (als Ein-Weg-Artikel) und -
Fig. 12 zeigt die Seitenansicht der Schlaucheinheit gemäß derFig. 11 .
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Fig. 1 shows a first preferred embodiment of the invention with a manually operable lever mechanism as a clamping device with a fixed hose receiving and ironing handle in open (untensioned) and closed (cocked) state, -
Fig. 2 shows a second preferred embodiment of the invention with a manually operable lever mechanism as a clamping device with fixed hose receptacle and buckle-shaped handle in open (untensioned) and closed (cocked) state, -
Fig. 3 shows a third preferred embodiment of the invention with a manually operable lever mechanism as a clamping device with fixed hose receiving and plate-shaped handle, in open (untensioned) and closed (cocked) state -
Fig. 4 shows a fourth preferred embodiment of the invention with a manually operable lever mechanism as a clamping device with fixed hose receptacle and toggle-shaped handle in open (untensioned) and closed (cocked) state, -
Fig. 5 shows a fifth preferred embodiment of the invention with a manually operated lever mechanism as a tensioning device with displaceable / movable hose receiving and key-shaped handle in untensioned and tensioned state, -
Fig. 6 shows a sixth preferred embodiment of the invention with a manually operable lever mechanism as a clamping device with movable / movable hose receiving and plate-shaped handle in the open (untensioned) and closed (cocked) state, -
Fig. 7 shows a seventh preferred embodiment of the invention with an electromotive actuated lever mechanism as a clamping device with sliding / movable hose receptacle and a gear drive as a lever mechanism between the drive motor and hose receptacle in open (untensioned) and closed (cocked) state, -
Fig. 8 shows as an illustrative example, the housing of a hose pump according to the invention with bow-shaped handle according toFig. 1 and in particular the hose receiving compartment in open (untensioned) condition, -
Fig. 9 shows the specific embodiment of the lever mechanism according to the present invention with a flap-shaped lever element as a handle (actuator) and a stationary pump rotor and displaceable hose receptacle as part of the lever mechanism and with already inserted hose unit in a perspective view, -
Fig. 10 the side view of the lever mechanism with inserted hose unit according to theFig. 9 in hose clamping position (with front flap closed), -
Fig. 11 shows the top view of a separately manufactured hose unit according to the invention (as a one-way article) and -
Fig. 12 shows the side view of the hose unit according to theFig. 11 ,
In der
In dem Ausführungsbeispiel gemäß der
An einer parallel zur Fluchtlinie verlaufenden Seite des Schlauchaufnahmefachs 1 ist die Spannvorrichtung mit Hebelmechanismus 2 am Pumpengehäuse 4 gelagert. Dieser Hebelmechanismus besteht vorliegend aus einer schwenkbar am Pumpengehäuse 4 anscharnierten Handhabe 16 in Form eines Griffbügels, der über ein (nicht gezeigtes) Gelenk, eine Federeinrichtung oder ein Zahngetriebe mit einem Schubelement (Stößelbauteil) 18 wirkverbunden ist. Das Schubelement 18 hat in der Draufsicht gemäß der
Beispielsweise kann das Schubelement 18 aus zwei parallelbeabstandeten Platten bestehen, die aneinander fixiert sind und zwischen denen der Pumpenkopf drehbar gehalten ist. In diesem Fall ist es auch vorteilhaft, wenn der (nicht weiter gezeigte) Antriebsmotor für den Pumpenkopf 6 ebenfalls an dem Schubelement 18 befestigt ist. Das Schubelement 18 ist dabei am Pumpengehäuse 4 verschiebbar geführt, derart, dass es nicht vom Pumpengehäuse 4 abgehoben werden kann. Die Lagerung des Pumpenkopfs 6 ist ferner so gewählt, dass der Pumpenkopf 6 an der Plattenkante des Schubelements 18, welche der Fluchtlinie zugewandt ist, über das Schubelement 18 vorragt.For example, the
Aus der
Die Schlaucheinheit 14 besteht demzufolge aus einem flexiblen, vorzugsweise elastisch deformierbaren (in Schlauchlängsrichtung dehnbaren) Schlauch 20, an dem zwei Halterungen oder Eingriffselemente 22 im Axialabstand zueinander befestigt oder ausgebildet sind, welche insgesamt die Schlauchhalterung der Schlaucheinheit darstellen. Diese Halterungen 22 bilden radiale Umfangsvorsprünge oder Krägen, die mit den Kerben 12 am Schlauchaufnahmefach 1 in hinterschneidenden Eingriff bringbar sind. Der Axialabstand der Halterungen 22 ist so gewählt, dass dann, wenn der Schlauch 20 in die beiden Kerben 12 eingelegt wird, sodass sich die Halterungen 22 hinter die Kerben 12 an das Schlauchaufnahmefach 1 anlegen, der dazwischen sich erstreckenden Schlauch-Mittenabschnitt 20a nicht oder nur geringfügig gespannt ist, wodurch er im Wesentlichen der Fluchtlinie folgt.The
Auf der bezüglich des Schubelements 18 gegenüberliegenden Seite der Fluchtlinie ist das Schlauchaufnahmefach 1 mit einer fixen Platte 24 teilabgedeckt, wobei die fixe Platte 24 eine innere Auswölbung 24a aufweist, in die jener Teil des Pumpenkopfs 6, der vom plattenförmigen Schubelement 18 in Richtung Fluchtlinie vorragt, bei Verschließen des Schlauchaufnahmefachs 1 eintaucht bzw. einfährt.On the opposite with respect to the
Die Funktionsweise der Schlauchpumpe gemäß dem ersten bevorzugten Ausführungsbeispiel der Erfindung lässt sich anhand der
Gemäß der
Anschließend wird die bügelförmige Handhabe 16 manuell in Richtung Fluchtlinie umgeklappt, wobei diese Klapp- bzw. Schwenkbewegung über den Hebelmechanismus mit einer entsprechenden Untersetzung auf das plattenförmige Schubelement 18 für dessen Verschieben übertragen wird. D.h., mit/durch Verschwenken der Handhabe 16 in Richtung Fluchtlinie wird das plattenförmige Schubelement 18 in Richtung hin zur fixen Platte 24 vorwärts geschoben, wobei gleichzeitig der daran drehbar gelagerte Pumpenkopf 6 gegen den Schlauch-Mittenabschnitt 20a gedrückt und vorgeschoben wird. Da der Schiebeweg des Schubelements 18 bis zum Anschlagen mit der fixen Platte 24 größer ist als der Abstand zwischen eingelegtem Schlauch 20 und dem Pumpenkopf 6 in vollständig geöffnetem Zustand, wird der Pumpenkopf 6 folglich durch den Schlauch 20 quasi hindurch gedrückt, wobei der Schlauch-Mittenabschnitt 20a zwischen den Halterungen 22 / Kerben 12 um den Pumpenkopf 6 über einen Teilumfang von diesem gespannt wird. Im vollständig geschlossenen Zustand des Schlauchaufnahmefachs 1 gemäß der linken Darstellung in
Im Verlauf der Schwenkbewegung der Handhabe 16 in Schließ- bzw. Spannrichtung überschreitet diese eine Art Totpunkt des Hebelmechanismus, worauf die Handhabe 16 unter Ausnutzung der bereits erzeugten Spannkraft des Schlauch-Mittenabschnitts 20a auf den Pumpenkopf 6 in Richtung gespannte Endposition der Handhabe (gemäß der linken Darstellung in
Die
Die Ausführungsbeispiele gemäß der
Die Längsnut(en) 24, 26 ist (sind) so dimensioniert, dass die Schnalle 16 beim Umklappen in deren spannende Endposition gemäß der linken Darstellung in
Schließlich kann die Handhabe 16 gemäß der rechten Darstellung in
Das Ausführungsbeispiel gemäß der
Sämtliche Ausführungsbeispiele gemäß der
Die
In diesem Fall ist der Pumpenkopf 6 gemäß der
Auf der dem Aufnahmeschacht 1a radial gegenüberliegenden Seite des Pumpenkopfs 6 ist eine balkenförmige Aufnahme 30 im Schlauchaufnahmefach 1 gelagert, derart, dass der im Wesentlichen tangential zum Pumpenkopf 6 ausgerichtete Balken 30 in dessen Querrichtung verschiebbar ist. In einen Mittenabschnitt des Balkens 30 (der balkenförmigen Aufnahme) ist im Schlauchaufnahmefach 1 ein in Schieberichtung des Balkens 30 sich erstreckender Längsschlitz 32 ausgearbeitet, durch den sich eine hebelförmige Handhabe 16 hindurcherstreckt, die an ihrem freien vorragenden Ende zu einer Taste ausgeformt ist. Die Handhabe 16 ist an ihrem anderen, nicht sichtbaren Ende im Pumpengehäuse 4 schwenkbar gelagert. In einem axialen Mittenabschnitt der hebelförmigen Handhabe 16 hat diese ein nicht im Einzelnen gezeigtes Mitnahmeelement, das mit der balkenförmigen Aufnahme 30 in Wirkeingriff steht, um eine Schwenkbewegung der Handhabe 16 bei entsprechender Untersetzung des hierdurch erzeugten Hebelmechanismus in eine Schiebebewegung des Balkens 30 zu transformieren.On the receiving
Wie ferner aus der
Sobald die Schlaucheinheit 14 in den Schlauchaufnahmeschacht 1a eingelegt ist, wird die Handhabe 16 betätigt, d.h. vorliegend vom Pumpenkopf 6 weg verschwenkt und somit die balkenförmige Aufnahme 30 vom Pumpenkopf 6 weg geschoben. Hierdurch legt sich der Schlauch-Mittenabschnitt 20a mit einer vordefinierten Spannkraft an den Teilumfang der Pumpenkopfes 6 an, wie dies in der rechten Darstellung der
Wie bei den zuvor beschriebenen Ausführungsbeispielen ist die Handhabe 16 gemäß dem fünften bevorzugten Ausführungsbeispiel der Erfindung so dimensioniert, dass diese kurz vor Erreichen ihrer spannenden Endposition (siehe rechte Darstellung in
Das fünfte Ausführungsbeispiel der Erfindung gemäß der
Zur Lösung dieses Problems sieht das sechste Ausführungsbeispiel der Erfindung gemäß der linken Darstellung in
Die Funktionsweise des Schlauchaufnahmefachs 1 und insbesondere der Spannvorrichtung mit Hebelmechanismus 2 gemäß dem sechsten Ausführungsbeispiel der Erfindung ist im Wesentlichen die Gleiche wie beim fünften Ausführungsbeispiel. D.h. die Verschwenkbewegung der plattenförmigen Klappe 16 wird über das Stößelbauteil 34 in eine Verschiebebewegung der balkenförmigen Aufnahme 30 transformiert, wobei jedoch gleichzeitig zur Anspannung der Schlaucheinheit 14 (siehe mittlere Darstellung der
Abschließend sei darauf hingewiesen, dass die Handhabe/Betätigungselement nicht notwendiger Weise manuell sondern auch motorisch betätigt werden kann. Ein solcher Motor kann grundsätzlich bei allen bereits beschriebenen Ausführungsbeispielen eingesetzt werden, um beispielsweise über ein Zahnradgetriebe oder einen Kolben eine Betätigungskraft auf die Handhabe/Betätigungselement aufzubringen. Indessen ermöglicht der Einsatz eines motorischen Antriebs auch eine Modifikation der Spannvorrichtung, wie sie nachfolgend anhand des siebten bevorzugten Ausführungsbeispiels gemäß der
Hierbei handelt es sich prinzipiell um ein Schlauchaufnahmefach 1 mit ortsfest gehaltenem Pumpenkopf 6 sowie einer plattenförmigen Abdeckkappe 16, die verschiebbar am Pumpengehäuse 4 oder Schlauchaufnahmefach 1 geführt ist. Die Abdeckplatte 16 weist eine Aufnahme für die Schlaucheinheit 14 auf bestehend aus zwei beabstandeten Einkerbungen 12, die fluchtend zueinander ausgerichtet sind und in die die Schlaucheinheit 14 mittels daran fixierter Halterungen/Eingriffselemente 22 in hinterschneidender Weise eingelegt werden kann (siehe hierzu die rechte Darstellung in
Der Antrieb wird vorliegend durch einen nicht gezeigten Elektromotor gebildet, der über einen Hebelmechanismus bestehend aus Excenter/Nocke und Stößelbauteil mit der Abdeckplatte 16 wirkverbunden ist. Alternativ hierzu sind aber auch andere Konstruktionen für einen Hebelmechanismus wie beispielsweise ein Zahnradgetriebe denkbar.The drive is presently formed by an electric motor, not shown, which is operatively connected via a lever mechanism consisting of eccentric / cam and plunger member with the
Durch Aktivieren des Motors wird über den Hebelmechanismus eine Schiebekraft auf die Abdeckplatte 16 aufgebracht, wodurch sich diese aus einer offenen Endposition gemäß der mittleren Darstellung in
In der
Demnach ist das Betätigungselement des Hebelmechanismus die schwenkbar am Schlauchaufnahmefach/Pumpengehäuse gelagerte Schutzkappe oder Schutzklappe 16 (könnte auch ein Schwenkbügel sein), mit welcher gleichzeitig das Schlauchaufnahmefach 1 in der Schlauch - Spannposition frontseitig (zumindest teilweise) abgedeckt ist/wird. Auf der dem Schlauchaufnahmefach 1 zugewandten Innenseite des Betätigungselements (Schutzklappe) 16 ist eine Klemm- oder Rastvorrichtung 40 vorzugsweise in Form einer Federklemm-/-schnappeinrichtung angeordnet, welche weiter vorzugsweise eine in Öffnungs - Bewegungsrichtung des Betätigungselements 16 wirkende Hinterschneidung bilden kann.Accordingly, the actuating element of the lever mechanism is pivotally mounted on the hose receiving compartment / pump housing protective cap or 16 (could also be a swivel bracket), with which at the same time the
Im Konkreten hat die Klemm-/Rastvorrichtung 40 auf der einen Seite der Schutzklappe 16 des Hebelmechanimus zwei leistenförmige, parallel zueinander ausgerichtete Vorsprünge 42, die von der Rückseite der Schutzklappe 16 in Richtung hin zum Schlauchaufnahmefach 1 vorragen und die zwischen sich einen Klemm- oder Rastspalt (Nut) 44 ausbilden. Hierbei können die Vorsprünge 22 im Wesentlichen ohne Oberflächenstruktur ausgebildet sein (ausschließlich zur Erreichung einer Klemmwirkung) oder sie weisen an ihrer jeweils freien (Vorder-) Kante zumindest eine Hinterschneidung auf etwa in Form einer Wulst (Klemm- und/oder Rastwirkung) auf. Natürlich kann die Klemm-/Rastvorrichtung 40 auch anderweitig gestaltet sein, etwa in Form eines pilzförmigen Sockels oder dergleichen Druck-/Rastknöpfe.Specifically, the clamping /
An der Schutzklappe 16 sind gemäß der
Die Schlauchaufnahme 30 ist dabei in Form eines Riegelbalkens oder Rahmes ausgebildet mit einem Mitnehmer-/Rasthaken 46, der an einem Mittenabschnitt des Rahmens 30 quer zur Verschieberichtung vorragt. Der Schiebeweg des Rahmens 30 in Schlauchspannrichtung (also weg vom Pumpenrotor 6) wird durch einen Anschlag oder Anschlagsvorsprung 48 begrenzt, der im Schlauchaufnahmefach 1 von dessen Rückwand aus laschen- oder zungenförmig in den Aufnahmefachraum vorragt und der somit gemäß der
Die (separate) Schlaucheinheit 14 gemäß der
Die Lasche 52 kann entweder ohne Oberflächenstruktur (ausschließlich zur Erreichung einer Klemmwirkung) oder mit einer Hinterschneidung (zur Erreichung einer Rastwirkung) versehen sein, wie dies nachfolgend noch beschrieben wird.The
Des Weiteren ist in dem Mittenabschnitt der balkenförmigen Schlauchhalterung 22 eine Rastkante 54 ausgeformt, die mit dem Mitnehmer-/Rasthaken 46 des Rahmens 30 verhak-/verrastbar ist(verclipt), wenn die balkenförmige Schlauchhalterung 22 in die riegelbalken- oder rahmenförmige Schlauchaufnahme 30 eingesetzt/eingeclipt wird.Furthermore, in the middle section of the bar-shaped
Diese Einsetz-/Einclipposition insbesondere bei geschlossener Abdeckklappe 16 des Hebelmechanismus ist in der
Demzufolge wir zunächst bei geöffneter Abdeckklappe 16 (entspricht auch dem Betätigungselement des Hebelmechanismus) die Schlaucheinheit 14 über die frontseitige Aufnahmefachöffnung in das Schlauchaufnahmefach 1 eingesetzt, indem der schlaufenförmige Schlauch 22 um den Pumpenrotor 6 gelegt und die balkenförmige Schlauchhalterung 22 an die bezüglich des Pumpenrotors 6 untere Seite der Schlauchaufnahme bzw. des Rahmens 30 eingelegt wird. Dabei verrastet/verclipt die Hinterschneidung 54 auf Seiten der Schlauchhalterung 22 mit dem Mitnehmer-/Rasthaken 46 auf Seiten des Rahmens 30 elastisch, sodass ein Entfernen der Schlauchhalterung 22 vom Rahmen 30 nur schwer unter Überwindung der elastischen Verrastung ermöglicht ist. Gleichzeitig drückt der Mitnehmer-/Rasthaken 46 in Schlauchspannrichtung auf die Schlauchhalterung 22. D.h. wird der Rahmen 30 über den Hebelmechanismus in Schlauchspannrichtung verschoben, drückt der Mitnehmer-/Rasthaken 46 auf die Schlauchhalterung 22, um diese mit zu führen. Der schlaufenförmige Schlauch 20 wird dabei beidseits des Mitnehmerhaken 46 an diesem in Richtung hin zum Pumpenrotor 6 vorbeigeführt, wie dies insbesondere in der
Wird nunmehr die Abdeckklappe 16 als Betätigungselement zum Spannen des Schlauchs 20 sowie zum Verschließen des Aufnahmefachs 1 umgelegt (siehe
Mit Erreichen der maximalen Schlauch-Spannposition der Abdeckklappe 16 wird die Lasche 52 an der Schlauchhalterung 22 in den Spalt 44 zwischen den Klemm-/Rastleisten 42 auf Seiten der Abdeckklappe 16 eingeführt und darin eingeklemmt und/oder verrastet. Gleichzeitig schlägt die Schlauchhalterung 22 am Anschlagsvorsprung 48 des Aufnahmefachs 1 an oder kommt in unmittelbare Nähe zum Anschlagvorsprung 48 zu liegen, derart, dass ein Weiterschieben der Schlauchhalterung 14 in Schlauchspannrichtung (im Wesentlichen) verhindert ist.Upon reaching the maximum hose clamping position of the
Wie aus der
Damit ist die gesamte Baugruppe bestehend aus
Schlauchaufnahme 30 mit daran ausgebildetem Mitnehmer-/Rasthaken 46,Schlauchhalterung 22 mit Hinterschneidung 54 (befindet sich im Rasteingriff mit dem Mitnehmer-/Rasthaken 46) und Lasche 52 sowieAbdeckklappe 16 mit Klemm-/Rasteinrichtung 40 (befindet sich in Eingriff mit der Lasche 52)
-
Hose receptacle 30 with trained catch / latchinghook 46, -
Hose bracket 22 with undercut 54 (located in locking engagement with the driver / latching hook 46) andtab 52 and -
Cover flap 16 with clamping / locking device 40 (is in engagement with tab 52)
Zusammenfassend betrifft die vorliegende Erfindung eine Schlauchpumpe zu medizinischen Zwecken mit einem Pumpengehäuse, in dem ein Schlauchaufnahmefach 1 ausgebildet/eingesetzt ist, in der ein Pumpenkopf 6 drehbar gelagert ist sowie mit einer (separaten) Schlaucheinheit 14, die in das Schlauchaufnahmefach 1 so einsetzbar/eingesetzt ist, dass ein Schlauch 22 der Schlaucheinheit 14 mit dem Pumpenkopf 6 in diesen zumindest teilweise umspannenden Eingriff kommt. Hierfür ist am Pumpengehäuse oder Schlauchaufnahmefach 1 eine Spannvorrichtung angeordnet, die mit der Schlaucheinheit 14 oder dem Pumpenkopf 6 zusammenwirkt, um bei deren Betätigung den Schlauch 20 um den Pumpenkopf 6 herum zu spannen. Erfindungsgemäß weist die Spannvorrichtung einen Hebelmechanismus auf, wobei vorzugsweise ein Hebelelement 16 des Hebelmechanismus gleichzeitig eine Schutzkappe zur zumindest teilweisen Abdeckung der Schlauchaufnahme 30 / des Schlauchaufnahmefachs 1 bildet oder hat. Ein Hebelelement (vorzugsweise die Schutz-/Abdeckklappe) hat ferner eine Klemm-/Rasteinrichtung 40 die in maximaler Schlauchspannposition mit einer Gegenklemm-/-rasteinrichtung 52 an der Schlaucheinheit 14 zusammenwirkt, um ein unbeabsichtigtes Entspannen des Schlauchs 20 zu be- oder verhindern.In summary, the present invention relates to a peristaltic pump for medical purposes with a pump housing, in which a
Claims (9)
- A medical peristaltic pump comprising a pump housing (4) in which a tube mounting case (1) is formed/inserted in which a pump head (6) is rotatably supported, and comprising a tube unit (14) consisting of a flexible tube (20) and a beam-type tube fixture (22) for holding the tube (20) at two positions longitudinally spaced apart from the tube, the tube unit (14) being insertable or inserted into the tube mounting case (1) so that by displacing the tube fixture (22) or the pump head (6), the tube (20) enters into tensioning engagement with the pump head (6) while at least partially enclosing the same,
as well as comprising a tensioning device (2) arranged at the pump housing (4) or at the tube mounting case (1) in the form of a lever mechanism for tensioning displacement of the tube fixture (22) or of the pump head (6) by at least one lever element (16), characterized in that a clamping or locking means (40) is provided on the lever element (16) which upon reaching a tube tensioning position engages in a counter-clamping or locking means (52) arranged on the tube fixture (22) for locking the tube fixture (22) and the tensioning device (2). - The peristaltic pump according to claim 1, characterized in that the lever element (16) of the lever mechanism at the same time constitutes or includes a protective cap or plate for at least partly covering the tube mounting case (1) on the front side.
- The peristaltic pump according to claim 2, characterized in that the protective cap either forms or is the lever element which is provided as manual operating element or handle (16) of the lever mechanism or forms or is the lever element (18, 32) which is operable via the handle (16) for transmitting force to the tube fixture (22) or the pump head (6).
- The peristaltic pump according to any one of the preceding claims, characterized by a tube mount (30) which is or can be movably arranged in or on the tube mounting case (1) when the pump head (6) is stationary and into which the tube (20) is insertable or inserted by means of the tube fixture (22) formed or fastened thereon.
- The peristaltic pump according to claim 4, characterized in that the lever mechanism acts on the tube mount (30) preferably as a further element of the lever mechanism so as to move the same relative to the stationary pump head (6) so that a loop-type central tube portion (20a) being arranged in the tube mount (30) is adjacent against the pump head (6) in a way encompassing the latter.
- The peristaltic pump according to any one of the preceding claims, characterized in that the lever mechanism is additionally configured to be self-locking.
- The peristaltic pump according to any one of the preceding claims, characterized by a stop projection (48) which is formed in the tube mounting case (1) and, upon reaching the tube tensioning position, presses against the movable tube fixture (22) or is provided in direct vicinity thereof so as to block further displacement thereof in the tube tensioning direction.
- The peristaltic pump according to any one of the preceding claims, characterized in that the counter-clamping or locking means (52) on the side of the tube fixture (22) is a tab preferably having at least one snap strip formed thereon and the clamping or locking means (40) is a spring/hook element 42 arranged on the rear side of the door-type lever element (16) which can be brought in clamping/locking engagement with the tab 52.
- The peristaltic pump according to claim 8, characterized in that the tab (52) at the same time forms the handle element for manually inserting the tube unit (14) into the tube mounting case (1).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP17210339.2A EP3324047B1 (en) | 2012-08-30 | 2013-08-21 | Tube reception device of a roller pump |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102012108052.6A DE102012108052A1 (en) | 2012-08-30 | 2012-08-30 | Hose receptacle of a roller pump |
PCT/EP2013/067368 WO2014033023A2 (en) | 2012-08-30 | 2013-08-21 | Hose receptacle of a roller pump |
Related Child Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP17210339.2A Division EP3324047B1 (en) | 2012-08-30 | 2013-08-21 | Tube reception device of a roller pump |
EP17210339.2A Division-Into EP3324047B1 (en) | 2012-08-30 | 2013-08-21 | Tube reception device of a roller pump |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2890895A2 EP2890895A2 (en) | 2015-07-08 |
EP2890895B1 true EP2890895B1 (en) | 2019-11-13 |
Family
ID=49035581
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP13753167.9A Active EP2890895B1 (en) | 2012-08-30 | 2013-08-21 | Hose receptacle of a roller pump |
EP17210339.2A Active EP3324047B1 (en) | 2012-08-30 | 2013-08-21 | Tube reception device of a roller pump |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP17210339.2A Active EP3324047B1 (en) | 2012-08-30 | 2013-08-21 | Tube reception device of a roller pump |
Country Status (6)
Country | Link |
---|---|
US (1) | US10060425B2 (en) |
EP (2) | EP2890895B1 (en) |
JP (1) | JP6234459B2 (en) |
DE (1) | DE102012108052A1 (en) |
HU (1) | HUE047768T2 (en) |
WO (1) | WO2014033023A2 (en) |
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US20140371707A1 (en) * | 2011-01-26 | 2014-12-18 | Sean Y. Sullivan | Method and device for insertion of tubing into irrigation and infusion fluid pumps |
US10041495B2 (en) * | 2015-12-04 | 2018-08-07 | Clay Valley Holdings Inc. | High volume vacuum pump for continuous operation |
US20170212750A1 (en) | 2016-01-22 | 2017-07-27 | Rigado, LLC | Compressed binary patching over wireless network |
US10670006B2 (en) | 2016-01-22 | 2020-06-02 | Graco Minnesota Inc. | Hose bracket for texture sprayer |
US10578096B2 (en) | 2016-06-30 | 2020-03-03 | Cole-Parmer Instrument Company Llc | Peristaltic pumphead and methods for assembly thereof |
DE102016009174B3 (en) * | 2016-07-29 | 2017-11-02 | W. O. M. World of Medicine GmbH | Hose cassette for a peristaltic pump with elastic legs |
JP6981996B2 (en) * | 2016-12-01 | 2021-12-17 | サラヤ株式会社 | Dispenser |
JP7222355B2 (en) * | 2017-09-26 | 2023-02-15 | ニプロ株式会社 | TUBE SET AND TUBE PUMP INCLUDING THE SAME |
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US11668295B2 (en) | 2018-12-28 | 2023-06-06 | Avent, Inc. | Pump head for a peristaltic pump |
US11690665B2 (en) * | 2018-12-28 | 2023-07-04 | Avent, Inc | Peristaltic pump assembly and system |
CN110480315A (en) * | 2019-08-27 | 2019-11-22 | 郑州飞龙汽车部件有限公司 | A kind of pump housing connecting tube inserting equipment |
CN114992108B (en) * | 2022-05-19 | 2023-12-15 | 中国科学院沈阳计算技术研究所有限公司 | Rotary water pump parameter measuring device |
CN114992100B (en) * | 2022-06-29 | 2023-12-22 | 重庆山外山血液净化技术股份有限公司 | Peristaltic pump capable of automatically disassembling and assembling pump pipe |
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2013
- 2013-08-21 HU HUE17210339A patent/HUE047768T2/en unknown
- 2013-08-21 US US14/420,949 patent/US10060425B2/en active Active
- 2013-08-21 EP EP13753167.9A patent/EP2890895B1/en active Active
- 2013-08-21 JP JP2015528960A patent/JP6234459B2/en active Active
- 2013-08-21 WO PCT/EP2013/067368 patent/WO2014033023A2/en active Application Filing
- 2013-08-21 EP EP17210339.2A patent/EP3324047B1/en active Active
Non-Patent Citations (1)
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Also Published As
Publication number | Publication date |
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EP2890895A2 (en) | 2015-07-08 |
EP3324047A3 (en) | 2018-08-15 |
EP3324047A2 (en) | 2018-05-23 |
US20150204321A1 (en) | 2015-07-23 |
WO2014033023A3 (en) | 2014-07-31 |
US10060425B2 (en) | 2018-08-28 |
WO2014033023A2 (en) | 2014-03-06 |
DE102012108052A1 (en) | 2014-03-06 |
JP6234459B2 (en) | 2017-11-22 |
JP2015526648A (en) | 2015-09-10 |
HUE047768T2 (en) | 2020-05-28 |
EP3324047B1 (en) | 2019-10-02 |
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