CN102762863A

CN102762863A - Safety device for a peristaltic pump

Info

Publication number: CN102762863A
Application number: CN201180009824XA
Authority: CN
Inventors: T·纽伦伯格
Original assignee: Fresenius Medical Care Deutschland GmbH
Current assignee: Fresenius Medical Care Deutschland GmbH
Priority date: 2010-02-18
Filing date: 2011-02-18
Publication date: 2012-10-31
Anticipated expiration: 2031-02-18
Also published as: JP5889803B2; DE102010002133B4; EP2536952B1; WO2011101430A1; EP2536952A1; JP2013519478A; DE102010002133A1

Abstract

A peristaltic pump, preferably for a dialysis device, has a rotor receptacle and has a rotor which can be connected to the rotor receptacle. Said rotor has preferably a multiplicity of marking devices, the type and/or arrangement of which serve(s) to encode at least one characteristic of the rotor. The peristaltic pump furthermore has a safety device with at least one sensing device by means of which the at least one characteristic of the rotor encoded by means of the marking device(s) can be checked, and which can be activated as a function of at least one of said characteristics of the rotor.

Description

The safety installations that is used for peristaltic pump

Technical field

The present invention relates to have the wriggling roller pump of removable rotor, especially, relate to the wriggling roller pump that is used for dialysis apparatus.

Background technique

The wriggling roller pump is used to transmit fluid through blocking, and for example is used for laboratory, small-scale production equipment, analytical equipment, infusion pump at large, and also is used for dialysis apparatus particularly.They comprise stator and in this stator interior rotor rotated, at least two squeezing rolls are blocked in the pump hose that inserts between stator and the rotor simultaneously, and advance the fluid in this pump hose thus.

In the wriggling roller pump of the type; For example; For the purpose that cleans or repair, can rotor be dismantled from the rotor scaffold usually, perhaps material different, diameter and/or the wall thickness of exchanging rotor more to be adapted to flexible pipe; Thereby for example regulate the stage clip of the squeezing roll that is used for rotor, perhaps utilize the rotor replacement rotor of different designs.And, the roller pump of much wriggling, especially, those that in laboratory, small-scale production equipment, analytical equipment and dialysis apparatus, use have a plurality of advancing meanss between rotor, possibly have different characteristic but said rotor is replaceable.These characteristics for example possibly depend on the viscosity of the pump hose, other parts in the TS Transport Stream of wriggling roller pump of use, the medium got by pump, transmission pressure and other parameter of expectation.

When pump gets clogged or comes the flow resistance in the downstream of self-pumping to increase; If the operation of wriggling roller pump continues; Then the pressure in flexible pipe increases very fast; And in the situation that does not have other safety precaution, this will cause the damage to flexible pipe or other parts (for example, filter, film, dialyzer or drip chamber) of being connected with flexible pipe inevitably.

In order to resist this damage, squeezing roll for example can with the direction of rotation vertically elasticity install, thereby they yield to the pressure of the increase in flexible pipe.In this situation, the elasticity coefficient of scaffold is confirmed maximum obstruction pressure, and has limited the transmission pressure of wriggling roller pump thus.This for example can come to realize technically that wherein, squeezing roll is rotatably installed in the end of said arm through the rotor with parallel two arms that can flexibly be shifted.

According to other parts of the fluid that is pumped, the hose that has inserted pump hose, use (for example; Filter, film, dialyzer and/or drip chamber) and the treatment type; In the situation of the wriggling roller pump that for example is used for dialysis apparatus, the elasticity coefficient of rotor can be different.Therefore, for example, about alternative, compare with the rotor of for example blood pump, the rotor of the wriggling roller pump of dialysis apparatus can be configured with lower spring pressure, that is, and and lower maximum obstruction pressure.Yet the design of the advancing means of wriggling roller pump is identical in others, thereby each rotor can be inserted in each stator.

During the cleaning and disinfection of dialysis apparatus, the rotor of pump removes from stator, thereby helps the sterilization of dialysis apparatus and rotor.In order to discern stator and correct rotor to be installed in each advancing means, the rotor of existing technology is provided with label usually, yet this label can come off along with the time.If mark on label or sign correctly are not read; Even label is intact; The risk that also has mistake during installation; And for example do not match because like this, with the parts (for example, filter, film, dialyzer and/or drip chamber) of the hose that inserts, use and the type of treatment.Therefore exist in the more danger of exchanging rotor by error after the sterilization of device, for example cause thus the rotor with incorrect roller spring pressure is inserted in the specific advancing means, perhaps, for example when the type change of treating, forget more exchanging rotor.This possibly not only cause the damage to the parts of dialysis apparatus, but also causes disadvantageous treatment results and to the threat of patient's health and lives.

Summary of the invention

Therefore the object of the invention is to guarantee that dialysis apparatus utilizes the rotor of right type correctly to construct; And particularly; Have correct spring pressure for each advancing means, and in all scenario, get rid of the possibility of the incorrect installation of dialysis apparatus reliably.

In the present invention through solving this problem according to the wriggling roller pump described in the claim 1.Specified preferred implementation in the dependent claims.

According to the present invention, specified the wriggling roller pump that is preferably used for dialysis apparatus, comprising: the rotor scaffold; Rotor, said rotor can be connected to said rotor scaffold, and preferably have a plurality of event marker, through the type of said event marker and/or at least one characteristic of arranging the said rotor of numeralization; And safety installations; Said safety installations has at least one detection device; Through said at least one detection device; Can check said at least one characteristic, wherein, can start said safety installations according at least one characteristic in these characteristics of said rotor by the said rotor of said event marker numeralization.

Through as at the wriggling roller pump described in the claim 1; Utilize at least one detection device of safety installations; For example can automatically check the adjusting of rotor type or rotor or be installed at least one characteristic of rotor in the advancing means of wriggling roller pump; And, under the situation of incorrect configuration, can start safety installations and trigger suitable action thus.In addition, detection device so being structured in the rotor or with the mode that prevents so loss of detection device they being attached to rotor is feasible easily technically.Another possibility that can imagine for example for will be so safety installations be attached to the regulating element of stage clip; Can come automatically to check the pretensioning of Regulation spring thus via the position Detection of detection device; And therefore check the pressure of Regulation spring, and therefore check blockage pressure.Through this mode,, also can prevent the incorrect configuration of advancing means reliably even in the situation of carrying out regular job by not too skilled staff, perhaps be in the busy situation in hospital.

In preferred embodiment, when the rotor that has incorrect or a unsuitable characteristic when the utilization of said wriggling roller pump is operated, can said wriggling roller pump be lost efficacy by said safety installations, and can the alerts triggered signal.Through this mode; Additionally, for example, the serviceability of wriggling roller pump is restricted to (for example can not causes dangerous value; Motor is only to operate at a slow speed air is discharged or tested this system from system); Perhaps, the record rotor configuration also can be imagined, all operations of the roller pump of also can be for example after a rotation of rotor or several rotations, forbidding immediately wriggling.Hereinbefore; " rotor with incorrect or unsuitable characteristic " can be understood that following rotor, that is, the type of this rotor, adjusting are (in this situation; For example, the rotor that has adjustable pressure) or at least one rotor characteristics do not have the requirement of corresponding its current application.Therefore, for example, possible is, the actual value of at least one characteristic of rotor not corresponding for operational condition requirement or best expected value, perhaps, the actual value of at least one characteristic of rotor is not positioned at the scope for the value of operational condition appointment.Like this, for example, what can imagine is; In the situation of the wriggling roller pump that is used for dialysis machine, according to operational condition, other other factor also is taken into account in wherein; Such as the characteristic of the parts of operator scheme, the use of wriggling roller pump, for example, flexible pipe, filter for installation, film device and/or other rotor; Programmed sequence of operations and/or other data, for example, the data relevant with treatment and/or patient.Can guarantee maximum safety thus.

Another preferred embodiment in; With respect to said rotor said event marker is set; Make that when said rotor turned round, said event marker was carried through said at least one detection device, and generate signal pattern by said at least one detection device; Through said signal pattern, can detect said at least one characteristic of said rotor.The particularly advantageous technically development of this representative wriggling roller pump thus, can come at least one characteristic (and not needing for example imaging technique or pattern recognition) of detection rotor through utilizing some simple and reliable sensors.Only after a revolution of rotor, or only after several revolutions, just can under the situation of incorrect configuration, trigger erecting device, and so further operation of the roller pump that in time stops to wriggle.

Another preferred embodiment in, can combine to assess the said signal pattern of said at least one detection device from the rotational speed signal that the wriggling roller pump drives.Rate signal (for example, generating), maker signal or any other rotational speed signal that the rotational speed signal of using can generate as the control impuls of stepper motor, by motor self by commutator or by independent tachometer.Through this mode, for example, can and the revolution number of turns irrespectively confirm the angular distance between two event marker exactly, the perhaps scope of certification mark device and between yardstick different markers device, distinguishing thus.

Another preferred embodiment in, can in each revolution, detect each event marker in the said event marker through at least two detection devices.This representes another possible mode; Promptly; This mode is for example confirmed the rotational speed of rotor; And thus for example and the revolution number of turns irrespectively confirm the angular distance between two event marker exactly, the perhaps scope of certification mark device and between yardstick different markers device, distinguishing thus.

Another preferred embodiment in, according to the said signal pattern of said at least one detection device, can additionally confirm the number of turns and/or the direction of rotation of the rotation of said rotor.If the specified distance that for example rises in the spin rotating shaft; The event marker that an event marker or particular type are only arranged; Several event marker that distribute on less than 180 ° rotation angle range are perhaps arranged, then also can use the detection of at least one characteristic of being responsible for rotor and the identical detection device of inspection to come measuring rotational simultaneously, and possibly; If event marker is suitably arranged, can also measure the rotating direction of rotor.

Another preferred embodiment in, can be magnetically, electromagnetic ground and/or detect said event marker with the mode that does not have contact optically.This make can guarantee to operate with the detection of event marker all especially reliably and avoid disturbing.

Another preferred embodiment in, at least one detection device in the detection device can have magnetic field sensor, preferably has Hall transducer.Particularly advantageous and the reliable mode of execution of the detection device of the wet or pollution effect of moisture-sensitive is not operated in this expression, and it allows the for example little permanent magnet device that serves as a mark to be attached on the rotor or in rotor.

Another preferred embodiment in, at least one detection device in the said detection device can have the proximity detector of preferred electromagnetic type or the proximity detector of induction type.As an example, induction that can be through foucault current is the certification mark device simply and reliably, resonance circuitry since the variation of induction lack of proper care, but also can detect through electric capacity change or optical measurement (IR reflects change).

Another preferred embodiment in, at least one event marker can have transponder device.This transponder device preferably can be RFID XPNDR Transponder (" RF identification " XPNDR Transponder) or RFID chip.This is only through the single marking device, worthwhile ground and realized the transmission of a plurality of or bulk information relevant with rotor reliably.Therefore, for example, can store and obtain a plurality of characteristics (for example, blockage pressure, the characteristic of pressure roller, for example width, shape and material, the quantity of pressure roller) of rotor, and additionally, independent rotor ID or the manufacturing data of rotor or the length of operation.

Another preferred embodiment in, said event marker can be arranged on the different distance place from the running shaft of said rotor scaffold.Through this mode, can increase the quantity of codifiability in a simple manner, to comprise for example other characteristic of rotor, perhaps such as the rotational speed and/or the so other information of direction of rotating.According to this mode, even in the narrower situation of rotor arm, also can be advantageously provided event marker more, even and utilize simple and worthwhile detection device also can increase the accuracy of detection.

Another preferred embodiment in; Can consider characteristic and/or the programmed sequence of operations of other parts and/or said at least one characteristic that other data are assessed said rotor by said safety installations; Said other parts for example are flexible pipe, filter for installation, film device, dialyzer and/or other rotor, and said other data for example are the data relevant with treatment and/or patient.In this manner, can a plurality of parameters relevant with the correct selection of rotor be considered therein, and can guarantee maximum safety and flexibility thus.Therefore, for example, utilize suitable event marker, mark also is feasible with automatic detection arrangement other parts in the stream of dialysis system technically; Similarly, can the operator scheme of dialysis apparatus be considered therein.Treatment and/or patient data can be checked with patient's chip card or other identification or data-storage system for example from computer system retrieval and transmission probably.Through this mode; Bar code from patient's archives or the bar code retrieval data on index card also are possible, thereby the data of for example being correlated with the patient, the information relevant with treatment, the type of dialysis, exchange membrane, ultrafiltration fluid, alternative, the flow of use and the time span of treating are considered therein.In specific situation, this possibly cause the possibility of automation of whole planning and the control of dialysis apparatus.

The present invention is not restricted to concrete mode of execution.All characteristics of above-mentioned mode of execution can freely be bonded to each other, as long as they not do not repel each other because of technical reason and to there not being negative effect each other.

Description of drawings

To combine accompanying drawing to describe two exemplary mode of executions of the present invention in detail below.In the accompanying drawings:

Fig. 1 is schematically showing of in stator, rotating of the rotor of advancing means of wriggling roller pump;

Fig. 2 is schematically showing from the signal waveform of proximity detector 1, proximity detector 2 and proximity detector 3;

Fig. 3 is the schematically showing of signal waveform of the Hall transducer in second illustrative embodiments.

Fig. 1 is schematically showing of in stator (1), rotating of the rotor (2) of advancing means of wriggling roller pump.Rotor (2) is mounted (removably being connected to) on the rotor scaffold that carries rotor (2), around pivot (3) rotation, and drives rotor (2).Rotor (2) but have two rotor arms of radial displacement (5) basically, said rotor arm (5) at one end is provided with squeezing roll (or pressure roller) and is applied to the spring pressure of the qualification on the direction of squeezing roll (4) here by spring (not shown).Here also unshowned pump hose leans on the wall of stator (1) and is blocked by squeezing roll (4), and wherein spring pressure acts on this squeezing roll (4), and is urged in known manner with pump thus at the inner fluid of pump hose and gets.

At three different distances places from pivot (3); In its both sides, on two parts of two rotor arms (4) that can hold event marker, one co-exists in 2 * 2 * 3=12 index aperture that gets out or mark depression (6; 7), and through utilizing sealing compound to seal durably.In these mark depressions (6) some comprise that form is the lamellule or tesserae (for example, the small pieces of copper, iron or aluminium of conduction; Solid black circles) event marker; Other mark depression (7) does not comprise event marker (hollow circle).S1, S2 and S3 (S representes sensor (sensor)) representative is arranged on the proximity detector (8,9,10) of the induction type in the rear wall of this stator at the near surface of stator (1).

Through the rotation of pump rotor, little tinsel periodically gets into the magnetic field of proximity detector (8,9,10).Therefore induce foucault current in the little tinsel that in magnetic field, moves, from magnetic field, draw energy, this so that can in proximity detector (8,9,10), the mode with energy consumption be detected.

Quantity and the geometric distribution of the small pieces of conduction can numeralization rotor (2) various characteristics.Therefore in addition, can the sensor signal of transition be used for the detection of complete revolution, and detect the speed of rotation and fully comprise period of other sensor signal.In Fig. 2, for example, the nethermost signal S3 in the transient signal waveform of description is used for detection rotor revolution, and the sensor signal in Fig. 2 is triggered in the rising side.S1 and S2 come the correlated characteristic of numeralization rotor with their transition waveform.The quantity of sensor in Fig. 1 and little tinsel is elective.

In unshowned another illustrative embodiments, each rotor is equipped with at least one magnet that is used to detect the direction of rotation.Through two directions that Hall transducer obtains to rotate that in the rear wall of stator, are connected in series, and the chronological analysis of said two Hall transducers at first detects magnet.If the speed of rotation is constant, then can detect the width of magnet by Hall transducer.

Be provided with the tachometer output that each rotor revolution generates the pulse of fixed qty if pump drives, then can obtain the mode of execution of special simplification.If magnet has different widths, then when magnet through out-of-date, have the tacho pulses of varying number, as shown in Fig. 3, and this can be used for the detection of the width of magnet.

In illustrative embodiments shown in Figure 3, rotor 1 has the magnet wideer than rotor 2, and can be through discerning through the detection of the quantity of out-of-date tacho pulses when magnet.

Handle according to the treatment of selecting, can start the supervision of rotor at the whole service time durations of machine.Yet, after installing, carry out inspection immediately and will have practical significance, for example during the filling of hose system.In this manner, before the treatment beginning, can notify the user to utilize incorrect or unsuitable rotor to dispose advancing means in time.

Reference numerals list

1. stator

2. rotor

3. pivot

4. squeezing roll

5. rotor arm

6. the mark depression that has event marker

7. the mark depression that does not have event marker

8. proximity detector S1

9. proximity detector S2

10. proximity detector S3

Claims

1. wriggling roller pump, said wriggling roller pump is preferably used for dialysis apparatus, and said wriggling roller pump comprises:

The rotor scaffold;

Rotor, said rotor can be connected to said rotor scaffold, and said rotor comprises one or more event marker, through the type of said one or more event marker and/or at least one characteristic of arranging the said rotor of numeralization; With

Safety installations, said safety installations has at least one detection device, through said at least one detection device, can check said at least one characteristic by the said rotor of said one or more event marker numeralization,

Wherein, can start said safety installations according at least one characteristic in the characteristic of said rotor.

2. wriggling roller pump according to claim 1; It is characterized in that; When the rotor that has incorrect or a unsuitable characteristic when the utilization of said wriggling roller pump is operated, can said wriggling roller pump be lost efficacy, and/or can the alerts triggered signal by said safety installations.

3. according to any one the described wriggling roller pump in the aforementioned claim; It is characterized in that, said one or more event marker is set, make when said rotor turns round with respect to said rotor; Said one or more event marker is carried through said at least one detection device; Thereby generate signal pattern by said at least one detection device,, can detect said at least one characteristic of said rotor through said signal pattern.

4. according to any one the described wriggling roller pump in the aforementioned claim, it is characterized in that, can combine to assess the said signal pattern of said at least one detection device from the rotational speed signal that the wriggling roller pump drives.

5. according to any one the described wriggling roller pump in the aforementioned claim, it is characterized in that, can in each revolution, detect each event marker in the said event marker through at least two detection devices.

6. according to any one the described wriggling roller pump in the aforementioned claim, it is characterized in that,, can additionally confirm the number of turns and/or the direction of rotation of the rotation of said rotor according to the said signal pattern of said at least one detection device.

7. according to any one the described wriggling roller pump in the aforementioned claim, it is characterized in that, can be magnetically, electromagnetic ground and/or detect said one or more event marker with the mode that does not have contact optically.

8. according to any one the described wriggling roller pump in the aforementioned claim, it is characterized in that at least one detection device in the said detection device has magnetic field sensor, preferably has Hall transducer.

9. according to any one the described wriggling roller pump in the aforementioned claim, it is characterized in that at least one detection device in the said detection device comprises the proximity detector of preferred electromagnetic type or the proximity detector of induction type.

10. according to any one the described wriggling roller pump in the aforementioned claim, it is characterized in that at least one event marker comprises transponder device.

11. any one the described wriggling roller pump according in the aforementioned claim is characterized in that said one or more event marker is arranged on the different distance place from the running shaft of said rotor scaffold.

12. according to any one the described wriggling roller pump in the aforementioned claim; It is characterized in that; Can consider the characteristic of other parts by said safety installations, and/or programmed sequence of operations and/or other data assess said at least one characteristic of said rotor, wherein; Said other parts for example are flexible pipe, filter for installation, film device, dialyzer and/or other rotor, and said other data for example are the data relevant with treatment and/or patient.

13. a dialysis machine, said dialysis machine have at least one according to any one the described wriggling roller pump in the aforementioned claim.