CN105179213A - End face peristaltic pump - Google Patents
End face peristaltic pump Download PDFInfo
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- CN105179213A CN105179213A CN201510647975.8A CN201510647975A CN105179213A CN 105179213 A CN105179213 A CN 105179213A CN 201510647975 A CN201510647975 A CN 201510647975A CN 105179213 A CN105179213 A CN 105179213A
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- pump line
- peristaltic pump
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- 230000002572 peristaltic effect Effects 0.000 title claims abstract description 74
- 230000008859 change Effects 0.000 claims description 15
- 238000000034 method Methods 0.000 abstract description 30
- 239000007788 liquid Substances 0.000 abstract description 25
- 230000008569 process Effects 0.000 abstract description 12
- 238000001125 extrusion Methods 0.000 abstract description 9
- 230000008901 benefit Effects 0.000 abstract description 7
- 241001131688 Coracias garrulus Species 0.000 description 90
- 230000001360 synchronised effect Effects 0.000 description 9
- 239000011800 void material Substances 0.000 description 8
- 230000015572 biosynthetic process Effects 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 6
- 239000012530 fluid Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 230000010349 pulsation Effects 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000001802 infusion Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 206010000234 Abortion spontaneous Diseases 0.000 description 1
- 241000226585 Antennaria plantaginifolia Species 0.000 description 1
- 206010011409 Cross infection Diseases 0.000 description 1
- 206010029803 Nosocomial infection Diseases 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 230000004308 accommodation Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
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- 238000003889 chemical engineering Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
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- 208000000995 spontaneous abortion Diseases 0.000 description 1
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- Reciprocating Pumps (AREA)
Abstract
The invention relates to an end face peristaltic pump. The end face peristaltic pump is characterized by comprising a pump body stator, a pump core rotor, rollers and a pump pipe; the rollers are fixedly connected with the pump core rotor and evenly distributed on the periphery of the end face of the pump core rotor; the pump body stator is provided with a guide groove in the shape of a circular rail, and the pump pipe can be inlaid into the guide groove; an outlet port and an inlet port allowing the pump pipe to go out of the groove and enter the groove are formed in the guide groove; by means of an interval in the guide groove, the process that extrusion of the rollers on the periphery of the pump core rotor to the pump pipe in the groove is changed from a full state to a gradually and evenly released state and then to a fully released state is achieved. Practice proves that the end face peristaltic pump is a feasible technical scheme for eliminating fluctuation of liquid flow output by the peristaltic pump. Meanwhile, the end face peristaltic pump has the advantages that the structure is simple; the pump pipe is convenient to replace; the operation is stable and reliable. The novel end face peristaltic pump has a function of constant flow.
Description
Technical field
The invention belongs to a kind of pipeline mounted pump, particularly relate to a kind of end face peristaltic pump.
Background technique
Peristaltic pump is widely used in chemical industry, medical treatment, and a kind of pipeline mounted pump technology in the fields such as food has the unique advantage can eliminating cross pollution by changing pump line.Structure can be divided into common rotary-type cylinder peristaltic pump also to claim lateral extrusion peristaltic pump, and novel end face peristaltic pump also claims axial compression peristaltic pump, and linear peristaltic pump etc.Main based on linear peristaltic pump at present in medical instruments field application, there is the shortcoming changed pump line inconvenience and export the fluctuation of liquid stream in rotary-type peristaltic pump.
Traditional rotary pump stem stem face peristaltic pump structure, its work characteristics is mounted in the pump line of equally distributed several rollers extruding of rotary pump core rotor periphery between roller and pump seat stator cylinder type inwall, enclosed point is formed in pump line inside, when pump core rotor rotates, enclosed point moves thereupon, and boost pump liquid in pipe flows out pump line.Roller successively contacts and extrudes pump line, departs from pump line to outlet port, and during operation, roller circulates the work gone round and begun again, and promotes liquid stream and exports.Usual peristaltic pump needs to have at least 1 reliable extrusion pump pipe of roller to form enclosed point, uninterrupted for ensureing roller extrusion pump pipe, when first roller departs from extruding pump line, follow-up roller must contact squeeze pump line, and the interval that therefore peristaltic pump tube is squeezed must be greater than interval spaced between pump core periphery adjacent rollers.Inner at peristaltic pump, roller realizes, for the interval of pump line extruding, can being referred to as operation interval.Just operation interval is become between the gateway of therefore usual peristaltic pump tube.
Because roller extrudes pump line when entering operation interval, pump line is squeezed portion deforms, and pump line is extruded partial volume and is reduced to 0, forms enclosed point.Decontrol extruding when roller leaves operation interval and depart from pump line, enclosed point disappears, the elastic recovering force of pump line recovers pump line shape, the partial volume that is squeezed discharges, because contrary with the effect of roller PF stream, make the raw fluctuating of output liquid miscarriage and pulsation phenomenon, time serious, even form output liquid backflow, feature when this is the operation of general peristaltic pump.
Because pump core periphery roller is evenly configuration, pump line is subject to the interval between the adjacent enclosed point of roller extruding formation, equals the interval between pump core periphery adjacent rollers.
When peristaltic pump is as medical apparatus infuse medical fluid and accurate Application in Chemical Engineering, there is higher requirement for liquid stream output stationary performance and precision controlling.Usually can pump line volume between roller as unit, controlling calculation delivery volume amount, but this is for the high occasion of infusion required precision, and inapplicable.If be applied to the occasion of the random start and stop of possibility, output quantity is difficult to precisely controlled.At present multinomial patent is had to this, exports the pulsation of liquid stream in order to level and smooth or elimination.
Conversion roller fashion of extrusion can be taked, or change pump line means of fixation, level and smooth roller departs from the process of release extruding pump line, with the fluid pulse that reaches the formation slowed down when roller departs from pump line as (CN1711420A and <PCT/US2003/0368312003.11.17>).This method requires that pump line is placed in the inner ovalisation of peristaltic pump, therefore requires that pump line self structure is unique, possesses one " flange ", can coordinate, be conveniently fixed on curved surface with " groove " above stator interior ellipsoidal structure.And roller has elastic support, change the squeezing parameter for pump line, these are very complicated in configuration aspects, and do not eliminate pulsation, just can be level and smooth, alleviate fluctuation.
Another kind of solution adopts to gather scroll wheel positions information according to sensor, regulates drive motor, control pump heart rotor speed, exports compensated waving with quickening liquid stream.Also can amass according to output liquid fluid capacitance, calculate in requisition for scroll wheel positions parameter, thus adopt and control scroll wheel positions method, ensure the required precision of output liquid stream, but reality still exists the possibility of backflow, also needs the speed governing of the control pump heart, to eliminate backflow.As <PCTWO2009/113075A1>.This method needs to gather scroll wheel positions information, installs multiple sensor, complex structure.If peristaltic pump requires intermittent work, there is the control problem of Acceleration and deceleration time point, due to the flexible hose of peristaltic pump tube, sensor is difficult to requirement accurately for the perception of scroll wheel positions, controls difficulty.
In medical instruments field application, require that infusion velocity is low, need accurately to control flow quantity, the fluctuation of liquid stream even refluxes, and may cause serious consequence.Peristaltic pump is widely used in medical instruments field, and usual needs frequently change pump line, and to eliminate cross infection, therefore pump line is conventional article of consumption, the pump line quality changed each time, and parameter exists larger dispersiveness.Adopt the method for adjustment peristaltic pump stator curved surface radian, or adopt the kinematic parameter method controlling peristaltic pump mechanism, be difficult to adapt to medical application requirement.
Because rotary-type peristaltic pump has a series of advantage in structure and operation, therefore need to find further the method and device thereof that solve rotary-type peristaltic pump output flow stabilizes.
Summary of the invention
The present invention provides a kind of and can have the end face peristaltic pump better solving and produce fluid pulse phenomenon for solving in known technology the technical problem that exists.
The technological scheme that the present invention takes for the technical problem existed in solution known technology is: it includes pump housing stator, pump core rotor, pump line, the roller be connected on the periphery described pump core rotor being evenly distributed on described pump core rotor end-face on described peristaltic pump, described pump housing stator has the guide groove of the circular track that can embed for described pump line, the circular track of described guide groove is the circular track groove corresponding with the circular trace that the epitrochanterian described roller of the described pump heart rotates, there is the entry and exit port for described pump line discrepancy groove in described guide groove, be no less than 2 at the described described roller extruding described pump line between inbound port that goes out, track section section in described guide groove, before being terminal apart from the outlet port of the described pump line in the guide groove described in described peristaltic pump pump housing stator and with the roller of epitrochanterian two the adjacent extruding pump lines of described pump core extrude on described guide groove circular track two of described pump line extrude a little between the equal track section section of the mutually isometric segment length of circumferential length, described track section is one make described pump line by being relax to gradually completely by the track section of a linear change of the state of relieving by the state that described roller is expressed to the end completely.
The advantage that the present invention has and good effect are:
End face peristaltic pump is the rotary peristaltic pump of new structure, is characterized in the extruding pump line direction changing conventional peristaltic pumps rotor pump cored structure and roller, fixes pump line in peristaltic pump stator faces, and roller is at the dynamic lower driving rolls extruding pump line of rotary pump core ribbon.Owing to changing the direction of peristaltic pump core roller extrusion pump pipe, end face peristaltic pump changes pump line state in pump simultaneously, limit pump line in the pump internal degree of freedom, its placement location must meet roller movement locus, provides possibility for improving peristaltic pump property indices further.The present invention is discharged gradually to be expressed to by the state extruded by roller completely and is decontroled the process that the process of state is a linear change completely due to the pump line that makes that have employed the last period of the pump line outlet port in pump housing stator guide groove circular track.And this process be length and the roller of epitrochanterian two adjacent extruding pump lines extrude on guide groove circular track two of pump line extrude a little between the equal interval of circumferential length in realize.
Facts have proved that this patent has structure simple, avoid different batches pump line parameters decentralization to affect, reliability is high, the advantage of good stability, is practicable constant flow peristaltic pump technological scheme.Add end face peristaltic pump and be convenient for changing pump line, especially can improve peristaltic pump and export the fluctuation of liquid stream, the advantage of rotary-type peristaltic pump highlights more, for applying in every field, has fine value.
Accompanying drawing explanation
Fig. 1 is the structural representation of end face peristaltic pump.
Embodiment
For content of the present invention, Characteristic can be understood further, hereby exemplify following examples, design is adopted to hold the method for deepening appropriate section linear tilt bottom pump line guide groove gradually, realize roller and loosen the pressure of oppressing pump line in roller radial direction gradually, until loosen extruding pump line completely, accompanying drawing is now coordinated to be described in detail as follows:
As shown in the figure, 4 rollers 3 around pump core rotor 2 radial rotary that pump core rotor 2 end face periphery is installed, have in the guide groove 9 consistent with the circular trace that pump heart roller rotates at pump housing stator 8 and have pump line 4.Roller 3 is the axis of pump core rotor 2, the i.e. radial direction of roller 3 for pump line 4 extruding force direction.
The pump housing stator 8 of end face peristaltic pump is provided with pump line 4 and enters, exports 7,6, and the liquid in pump line 4 constantly advances in roller 3 dynamic extruding pump line 4 process, and is exported through channel outlet 6 by pump line 4.Between pump housing stator 8 inherent pump line 4 gateway 6,7, pump line is subject to the circular groove part that roller 3 extrudes and is the operation interval of peristaltic pump.The pump housing 8 and pump cover 1 are linked into an integrated entity by hinge 11 and hinge axis 10, and fastening by respective bolt passing hole 12 and 13; Pump core rotor 2 is placed between pump housing stator 8 and pump cover 1; Roller 3 on pump core rotor 2 is just in time pressed on pump line 4.From pump line through entrance 7 channel bottom entered circular guide groove be plane, can ensure that roller evenly effectively extrudes pump line, from the distance circular groove bending point reached before pump line outlet 6 is the position of 90 degree, stop to the position of circular groove by delivery outlet 6, it is the inclined plane section of linear change bottom guide groove, in figure 5 illustrates the situation of change of guide groove 9 bottom shape, is placed in the shape of the pump line 4 in circular groove with guide groove 9 bottom surface curvilinear motion.
As shown in the figure, pump core rotor 2 diameter 75 millimeters, evenly installs the roller 3 of 4 extruding pump lines 4 at pump core rotor 2 edge.Roller 3 diameter 13 millimeters, width 7 millimeters, internal diameter 2 millimeters, therefore can extrude pump line 4 maximum depth is 5.5 millimeters.Pump line 4 external diameter 6 millimeters, internal diameter 3 millimeters, wall thickness 1.5 millimeters.Pump housing stator 8 has width 8 millimeters, the degree of depth is that the circular track guide groove 9 of 7 millimeters holds pump line 4, and guide groove 9 degree of depth of going deep into that actual roller 3 extrudes pump line 4 is 4.5 millimeters, for ensureing extruding reliability, excessive compression amount is 0.5 millimeter, is 2.5 millimeters after pump line 4 is compressed.Between the roller 3 of 4 pump core rotors, angle is 90 degree.
In the position that circular groove distance pump line 4 output port 6 is 90 degree, it is the starting point that roller 3 discharges extruding pump line 4, pump housing stator 8 pressure-bearing surface starts to form the slope change evenly declined, the degree of depth that pump line 4 is squeezed reduces gradually, before delivery outlet 6, the pump housing stator 8 pressure-bearing surface drop-out value of groove 9 needs to ensure roller 3 last no longer contact pump line 4, recover the non-squeezed state of pump line 4, delivery outlet 6 discharges terminal groove depth decline numerical value should be equal to or greater than the degree of depth that roller 3 gos deep into guide groove 9, namely guide groove deepens to be greater than 4.5 millimeters, actual guide groove 9 degree of depth is greater than 11.5 millimeters, can ensure that roller 3 and pump line 4 depart from completely.Concrete changing slope curve, in fact also can be subject to pump line own material performance, size, roller radius, and the impact of concrete peristaltic pump design data etc. factor, needs suitably to estimate, and through overtesting and adjustment, finally determine.Can think, adopt the linearly domatic basic skills as the process control of control roller release extruding pump line to be suitable.
The usual peristaltic pump of above-mentioned structural change departs from the working method of extruding pump line fast at pump line outlet port roller, and peristaltic pump work is coordinated by two rollers and realizes.The roller interval of the roller of being wherein close to the exit before outlet, the interval namely between two adjacent rollers starts the extruding evenly loosened gradually for pump line, namely evenly discharges the space that this roller occupies because extrusion pump pipe forms enclosed point gradually; Pump line is departed from completely to outlet port, the process broadening making roller depart from extruding pump line is the interval exporting previous roller interval, roller can be squeezed in pump line ingress distortion and the volume that reduces is dispersed discharges, thus to avoid the volume of concentrating in outlet port release because of extrusion-deformation; Follow-up roller realizes the work of conventional peristaltic pump roller extruding PF stream.The volume of two roller unit time formation when synchronous propelling is contrary, namely in whole releasing course, the speed in whole spaces that the roller of being close to the exit progressively discharges its formation enclosed point and occupies, that roller before the roller of being close to the exit therewith, continue the liquid promoted between these two rollers advance to outlet thus discharge the speed of liquid, i.e. proportional but also reaching of cooperatively interacting: when this roller of being close to the exit discharges its whole spaces occupied because forming enclosed point completely, the liquid be between these two rollers also just in time all flows out.Due to volume rate of release uniform and stable, the liquid stream that can balancedly offset part and advance, can not produce the big ups and downs exporting liquid stream.When keeping two rollers to advance, the rate of change of two-part volume is stablized, then export liquid stream and keep constant, this peristaltic pump working method can be referred to as " synchronous volumetric void fraction " technology.Adopt the end face peristaltic pump of " synchronous volumetric void fraction ", owing to needing the roller of accommodation 2 kinds of different operating mechanism in operation interval, the number of rollers change that the pump heart evenly configures, peristaltic pump operation interval angle also respective change.
In the end face peristaltic pump of reality, be improve extruding PF stream reliability, the rotary pump heart can evenly be configured with multiple roller, the angle between roller and the interval of formation identical, it is also identical that extrusion pump pipe forms " pincushion ".When realizing " synchronous volumetric void fraction ", a roller before the roller of release extruding pump line and the outlet of interval just operation interval and interval, because this section of track roller decontrols the extruding for pump line gradually, therefore in the track of above-mentioned guide groove, the section of the roller extrusion pump pipe function realizing conventional peristaltic pump is also being needed with this section adjacent sections, namely operation interval should comprise between crush zone and loosen interval, and therefore operation interval is at least 2 times of pump core periphery roller interval section.
Realize number of rollers needed for " synchronous volumetric void fraction " peristaltic pump and be greater than conventional peristaltic pump number of rollers.General end face peristaltic pump can realize 360 degree of working spaces, needs 1 roller to complete extruding task.But " synchronous volumetric void fraction " then needs 2 rollers, complete extruding and release task respectively, now pump line gateway is in same position, offset.Be generally less than 360 degree of working spaces, for guaranteeing when roller leaves operation interval, follow-up roller contact extruding pump line, the roller worked in working space is at least 3.According to the needs of engineering design, number of rollers can be many, and the roller of extruding PF stream and interval, may have multiple, roller and the interval of loosening extruding only have one.
The feature being squeezed according to peristaltic pump tube and discharging, can the distortion of analytical calculation pump line and the process of volume-variation thereof, and the method for control roller release extruding pump line of deriving also provides the multiple specific embodiments loosening track section, but mathematical analysis more complicated.In practical engineering application, concrete condition is changeable, is difficult to the condition meeting analytical model, and more gear to actual circumstances in engineer applied be adopt approximation method.
When the practical application of " synchronous volumetric void fraction " technology, multiple approximation method can be adopted, meet actual demands of engineering, realize peristaltic pump and export the object that liquid stream eliminates fluctuation.Use in the above-described embodiments and reduce roller gradually the method for pump line pressure is ensured that roller discharges the process of extruding pump line gradually, and the angle that roller advances for the extruding degree of depth and the roller of pump line is linear.Namely describe in " claim " from release starting point, reach gradually and finally discharge extruding completely, the whole crushes degree of depth advances formation even variation with roller.In order to realize pump line by being expressed to the state at the end gradually to being decontroled conditions dictate completely by described roller completely, there is multiple method, the method of stator pressure-bearing surface and the radial progressive level and smooth intensification of roller can be adopted, also can adopt along roller shaft to the method changing pump line position gradually, or adopt the method simultaneously changed along roller radial-axial, or other can for pump line extruding, to loosen process be gradually linear change at the interval internal trolley of specifying, final roller discharges the extruding to pump line completely, can eliminate and export fluid pulse phenomenon.
Can adopt in end face peristaltic pump and realize pump line the last period of the outlet port of the guide groove on accomplished in many ways pump housing stator by the state extruded by roller completely to the process by the process of the state of relieving being a linear change completely, thus reach the actual result of the stable output liquid stream of expection.Other schemes can select design as the case may be, and above-described embodiment is one of relatively simple scheme, and practice shows to adopt accomplished in many ways roller to loosen extruding for pump line gradually.
The realization of peristaltic pump " synchronous volumetric void fraction ", need pump line can keep the stable of its state in peristaltic pump running, roller synchronously can produce the volume of cancelling out each other by even, stable output liquid stream.The unique advantage of this end face peristaltic pump just, in running, guide groove effectively can maintain the stability of pump line location status.Facts have proved, end face peristaltic pump adopts " synchronous volumetric void fraction " technology to obtain good effect, peristaltic pump liquid stream stable output can be realized, overcome the intrinsic defect of the output liquid stream fluctuation that usual peristaltic pump exists, give full play to the superiority that rotary-type peristaltic pump is applied in each field.
Claims (1)
1. an end face peristaltic pump, it includes pump housing stator, pump core rotor, pump line, the roller be connected on the periphery described pump core rotor being evenly distributed on described pump core rotor end-face on described peristaltic pump; Described pump housing stator has the guide groove of the circular track that can embed for described pump line, the circular track of described guide groove is the circular track groove corresponding with the circular trace that the epitrochanterian described roller of the described pump heart rotates, there is the entry and exit port for described pump line discrepancy groove in described guide groove, it is characterized in that; 2 are no less than at the described described roller extruding described pump line between inbound port that goes out; Track section section in described guide groove, before being terminal apart from the outlet port of the described pump line in the guide groove described in described peristaltic pump pump housing stator
andwith the roller of epitrochanterian two the adjacent extruding pump lines of described pump core extrude on described guide groove circular track two of described pump line extrude a little between the equal track section section of the mutually isometric segment length of circumferential length, be one described pump line is relax to gradually completely by the track section of a linear change of the state of relieving by being expressed to the state at the end by described roller completely in described track section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510647975.8A CN105179213A (en) | 2015-10-09 | 2015-10-09 | End face peristaltic pump |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510647975.8A CN105179213A (en) | 2015-10-09 | 2015-10-09 | End face peristaltic pump |
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| Publication Number | Publication Date |
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| CN105179213A true CN105179213A (en) | 2015-12-23 |
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| CN201510647975.8A Pending CN105179213A (en) | 2015-10-09 | 2015-10-09 | End face peristaltic pump |
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| CN (1) | CN105179213A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108105074A (en) * | 2017-11-27 | 2018-06-01 | 中国科学院苏州生物医学工程技术研究所 | A kind of peristaltic pump diverter control system and control method |
| CN108223342A (en) * | 2017-12-08 | 2018-06-29 | 东莞市松研智达工业设计有限公司 | A kind of peristaltic pump that pulsation is eliminated using guide rail |
| CN108361179A (en) * | 2018-01-23 | 2018-08-03 | 四川君汇科技有限公司 | End face type peristaltic pump |
| CN116292213A (en) * | 2023-03-20 | 2023-06-23 | 赛雷纳（中国）医疗科技有限公司 | Micro flow screw pump |
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| DE3726452A1 (en) * | 1987-08-08 | 1989-02-16 | Schael Wilfried | Peristaltic pump for medical purposes |
| WO1999042726A1 (en) * | 1998-02-19 | 1999-08-26 | The University Of Melbourne | Linearised peristaltic pump |
| US20040096347A1 (en) * | 2002-11-18 | 2004-05-20 | Pelmulder John P. | Uniform flow displacement pump |
| CN102032155A (en) * | 2009-09-25 | 2011-04-27 | 冯筠荪 | Peristaltic pump |
| CN204253335U (en) * | 2014-11-17 | 2015-04-08 | 张彦峰 | Micropulsation Wriggling Pump Head and peristaltic pump |
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2015
- 2015-10-09 CN CN201510647975.8A patent/CN105179213A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5946387A (en) * | 1982-09-10 | 1984-03-15 | Iwata Tosouki Kogyo Kk | Squeeze type pump |
| DE3726452A1 (en) * | 1987-08-08 | 1989-02-16 | Schael Wilfried | Peristaltic pump for medical purposes |
| WO1999042726A1 (en) * | 1998-02-19 | 1999-08-26 | The University Of Melbourne | Linearised peristaltic pump |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108105074A (en) * | 2017-11-27 | 2018-06-01 | 中国科学院苏州生物医学工程技术研究所 | A kind of peristaltic pump diverter control system and control method |
| CN108105074B (en) * | 2017-11-27 | 2023-09-12 | 中国科学院苏州生物医学工程技术研究所 | Peristaltic pump diversion control system and control method |
| CN108223342A (en) * | 2017-12-08 | 2018-06-29 | 东莞市松研智达工业设计有限公司 | A kind of peristaltic pump that pulsation is eliminated using guide rail |
| CN108361179A (en) * | 2018-01-23 | 2018-08-03 | 四川君汇科技有限公司 | End face type peristaltic pump |
| CN108361179B (en) * | 2018-01-23 | 2022-04-05 | 四川君汇科技有限公司 | End face type peristaltic pump |
| CN116292213A (en) * | 2023-03-20 | 2023-06-23 | 赛雷纳（中国）医疗科技有限公司 | Micro flow screw pump |
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