CN101363435A - Capacity balancing pump for purifying blood - Google Patents
Capacity balancing pump for purifying blood Download PDFInfo
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- CN101363435A CN101363435A CNA2008100702530A CN200810070253A CN101363435A CN 101363435 A CN101363435 A CN 101363435A CN A2008100702530 A CNA2008100702530 A CN A2008100702530A CN 200810070253 A CN200810070253 A CN 200810070253A CN 101363435 A CN101363435 A CN 101363435A
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- ceramic piston
- pump
- inner chamber
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Abstract
A capacity balancing pump for purifying blood is installed with a ceramic piston in an internal cavity of the pump body and the middle part at the bottom end of the ceramic piston is provided with a sliding chute along the radical direction; a sliding block which is connected with the upper end of an eccentric axle is arranged in the sliding chute, the lower end of the eccentric axle is fixed on the output axle of a driving motor; a first joint and a second joint are symmetrically arranged on one end of the pump body; a third joint and a fourth joint are symmetrically arranged on the other end of the pump body; the central holes of the joints are all communicated with the internal cavity of the pump body and one-way valves are arranged in the joints, wherein, the one-way valves inside the first and the fourth joints control the outward liquid to flow into the internal cavity of the pump body unidirectionally and the one-way valves of the second and the third joints control the outward liquid to flow into the internal cavity of the pump body unidirectionally . The capacity balancing pump has a simple and reliable structure, thus ensuring that the liquid inhaled and drained from the left and right sides of the ceramic piston to be always the same and ensuring that the dialysate amount and the waste liquid amount to keep a balance; moreover, the controlling is simple and the precision is guaranteed.
Description
Technical field
The present invention relates to a kind of member of blood cleaning equipment, relate in particular to the haemodialysis capacity balancing pump, be used to guarantee that the dialysis liquid measure and the waste liquid amount that pass in and out dialyzer keep balance.
Background technique
Haemodialysis (HD) treatment is that uremia, acute and chronic renal failure are combined the anti-main therapeutic modality with existence of patient in latter stage.Because the kidney of uremic patient has partially or completely lost urinary function, so when carrying out hemodialysis, often need to rely on hemodialysis apparatus when removing toxin, to reach the purpose of dehydration.
The general liquid each and that blood exchanges of hemodialysis is raised between 150 liters 120, equipment is when providing big dialysis liquid measure like this, how to guarantee to pass in and out the dislysate balance of dialyzer, and then to reach accurate ultrafiltration dehydration be the problem that dialysis machine need be considered.
Present blood cleaning equipment adopts pressure hyperfiltration process and turnover dialysate flow comparison method more.Because all corresponding relatively-stationary ultrafiltrate coefficient (ml/mmHg.h) of every dialyzer, promptly when fixing semipermeable membrane external and internal pressure difference, the dehydrating amount in the unit time from blood has just been fixed, Here it is pressure hyperfiltration process; And the difference that the flow method of comparison adopts the control pump speed to come the flow of turnover dislysate in unit of adjustment's time, dislysate output and dislysate to go into amount more is the dehydrating amount in patient's body.
Above dual mode all exists dehydrating amount wayward, and the situation that precision is relatively poor is described below respectively:
1, pressure ultrafiltration.Because it is bigger that each dialyzer so the ultrafiltrate coefficient that has has error, changes through ultrafiltrate coefficient after reusing, it is bigger with reality dehydration error to cause setting dehydration; In addition, because the variation in pressure in blood circuit and the dialysis fluid circuit is bigger, and have the pressure monitoring error in the therapeutic process, it is bigger with actual dehydration error also can to cause setting dehydration.
2, flow method of comparison.Because the dialysis liquid measure that each hemodialysis uses all reaches more than 100 more than the liter, so the slight error of turnover liquid measure just may produce very high integrating error, it is bigger to cause setting dehydration and the reality error of dewatering.
The bigger direct result of dehydration error is to influence result of treatment, even entail dangers to patient life.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of capacity balancing pump for purifying blood, keeps balance with dialysis liquid measure and the waste liquid amount that guarantees the turnover dialyzer.
Technological scheme of the present invention is as follows: a kind of capacity balancing pump for purifying blood, comprise drive motor, the pump housing and Ceramic piston, its key is: described pump housing horizontal arrangement, the Ceramic piston of Spielpassung with it is housed in the inner chamber of the pump housing, this Ceramic piston can be in the inner chamber of the pump housing move left and right, and chute is offered on radially in the middle part of Ceramic piston bottom, slide block is housed in the chute, described slide block is connected with the upper end of eccentric shaft, the lower end of eccentric shaft is fixed on the output shaft of drive motor, and this drive motor is installed in the below of the pump housing by motor fixing frame; End at the described pump housing is symmetrical arranged first joint and second joint, the other end of the pump housing is symmetrical arranged the 3rd joint and the 4th joint, the center hole of above-mentioned each joint all communicates with the inner chamber of the pump housing, and one-way valve is housed all in each joint, the outside one-way flow of liquid of the one-way valve control pump intracoelomic cavity in the first, the 4th joint wherein, the liquid of the one-way valve control outside in second, third joint is to the inner chamber one-way flow of the pump housing.
Adopt above technological scheme, two joints of the pump housing one end are connected with the liquid inlet and outlet pipe of dislysate respectively, and two joints of the pump housing the other end are connected with the liquid inlet and outlet pipe of waste liquid respectively.First one-way valve is installed in first joint, second one-way valve is installed in second joint, the 3rd one-way valve is installed in the 3rd joint, the 4th one-way valve is installed in the 4th joint.When drive motor in the process of rotation, the output shaft of drive motor can drive eccentric shaft rotation, and eccentric shaft can drive Ceramic piston move left and right in the inner chamber of the pump housing when driving slide block and sliding in the chute of Ceramic piston.When Ceramic piston during to left movement, can allow the cavity volume in Ceramic piston left side diminish, liquid in the cavity is pushed first one-way valve open and is flowed out, this moment, the cavity volume on Ceramic piston right side increased, form negative pressure and produce suction,, suck liquid the 3rd one-way valve opens, owing to the effect of pressure, second one-way valve and the 4th one-way valve can be in closed condition in this process.When Ceramic piston moves right, can allow the cavity volume on Ceramic piston right side diminish, liquid in the cavity is pushed the 4th one-way valve open and is flowed out, this moment, the cavity volume in Ceramic piston left side increased, form negative pressure and produce suction,, suck liquid second one-way valve opens, owing to the effect of pressure, first one-way valve and the 3rd one-way valve can be in closed condition in this process.This shows that the present invention can realize that pump housing the right and left sucks and the flow velocity of drain by the rotating speed of accurate controlling and driving motor per minute, and then has guaranteed that the turnover liquid of the right and left is consistent at any time.
The inner chamber of the above-mentioned pump housing and Ceramic piston are cylindrical, and both diameters adapt.Cylindrical structural helps processing and guarantees machining accuracy, and it is more smooth and easy to make that Ceramic piston moves in the pump housing.
On the inwall of the above-mentioned pump housing, offer two symmetrical annular grooves, first seal ring and second seal ring are installed respectively in two annular grooves.Do not occur revealing in the process of seal ring assurance Ceramic piston move left and right in the pump housing, guaranteed that further the turnover of the right and left liquid is consistent at any time.
For simplified structure, make more compact structure, and convenient the installation, the chute on the above-mentioned Ceramic piston is up-small and down-big stepped shape groove, slide block is positioned at appearing on the stage the stage of this groove, and the center of slide block offers mounting hole, and the upper end of described eccentric shaft is stretched in this mounting hole.
The invention has the beneficial effects as follows:
1, simple and reliable for structure, because the diameter at the Ceramic piston two ends of move left and right is consistent, and the distance of move left and right also is consistent, it is identical all the time with the liquid of discharging to have guaranteed that like this Ceramic piston the right and left sucks, and can guarantee that in dialysis treatment the dialysis liquid measure and the waste liquid amount that pass in and out dialyzer keep balance.
2, can realize that the right and left sucks and the flow velocity of drain by the rotating speed of accurate controlling and driving motor per minute, control is simple, and precision is secure.
3, adopt Ceramic piston, wear-resisting property is good, biology performance is good, and the long-term error that produces of using is also minimum.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Fig. 2 is the A-A sectional view of Fig. 1.
Fig. 3 is dialysis ultrafiltration schematic representation.
Embodiment
The invention will be further described below in conjunction with drawings and Examples:
As shown in Figure 1 and Figure 2, the pump housing 5 is horizontal arrangement, and the inner chamber of this pump housing 5 is cylindrical.Left end symmetry at the pump housing 5 is installed first joint 1 and second joint 9, wherein first joint 1 is last, second joint 9 is following, the center hole of first, second joint 1,9 all communicates with the inner chamber of the pump housing 5, and be equipped with in the center hole of first joint 1 in the center hole of first one-way valve, 2, the second joints 9 second one-way valve 8 is housed.Right-hand member symmetry at the pump housing 5 is installed the 3rd joint 12 and the 4th joint 16, the 3rd joint 12 is last, the 4th joint 16 is following, three, the center hole of the 4th joint 12,16 all communicates with the inner chamber of the pump housing 5, and be equipped with in the center hole of the 3rd joint 12 in the center hole of the 3rd one-way valve 13, the four joints 16 the 4th one-way valve 15 is housed.The outside one-way flow of liquid of described first one-way valve 2 and the 4th one-way valve 15 control pump housings 5 inner chambers, the liquid of second one-way valve 8 and the 3rd one-way valve 13 control outsides is to the inner chamber one-way flow of the pump housing.
As shown in Figure 1 and Figure 2, Ceramic piston 3 is installed in the inner chamber of the pump housing 5, and this Ceramic piston 3 also is cylindrical, and the diameter of the diameter of Ceramic piston 3 and the pump housing 5 inner chambers adapts, between the two Spielpassung; The length of Ceramic piston 3 is smaller than the length of the pump housing 5 inner chambers, concrete little what require to decide according to reality.Offer chute at the middle part of described Ceramic piston 3 bottoms on radially, chute is up-small and down-big stepped shape groove, slide block 4 was installed in the stage of appearing on the stage of this groove, slide block 4 is the packet structure, the appear on the stage width in stage of the length of slide block 4 and groove adapts, and slide block 4 is connected with drive motor 11 by eccentric shaft 6.
From Fig. 1, among Fig. 2 as can be known, eccentric shaft 6 is by on axially upward misplacing, the eccentric body at following axle body and middle part is formed, wherein eccentric body is arranged in the leave from office stage of Ceramic piston 3 upper hopper chutes and the via hole of the pump housing 5 bottom surfaces, vertical the linking to each other of end face of the last axle body of eccentric shaft 6 and eccentric body, and last axle body stretches in the mounting hole of offering at slide block 4 centers, described axle body down links to each other with the bottom surface of eccentric body is vertical, and the following axle body of eccentric shaft 6 is fixed on the output shaft of drive motor 11, this drive motor 11 is installed in the bottom of the pump housing 5 by motor fixing frame 10, and drive motor 11 is positioned at the below of the pump housing 5.Drive motor 11 is in the process of rotation, and the output shaft of drive motor 11 can drive eccentric shaft 6 rotation, and eccentric shaft 6 can drive Ceramic piston 3 move left and right in the inner chamber of the pump housing 5 when driving slide blocks 4 and sliding in the chute of Ceramic piston 3.On the inwall of the described pump housing 5, offer two symmetrical annular grooves, first seal ring 7 and second seal ring 14 are installed respectively in two annular grooves, first seal ring 7 and second seal ring 14 contact with the outer wall of Ceramic piston 3 all the time, not occur leakage in the process that guarantees Ceramic piston 3 move left and right in the pump housing 5.
As shown in Figure 3, first joint 1 is connected with the dislysate inlet of dialyzer 17 by pipeline among the present invention, second joint 9 is connected with dislysate liquid inlet pipe 18, and the 3rd joint 12 is connected by the waste liquid outlet of pipeline with dialyzer 17, and the 4th joint 16 is connected with waste liquid drain pipe 19.Blood enters dialyzer 17 from arterial end under the driving of blood pump 20, exchange the back feedback with dislysate and be the human vein end, and dislysate enters dialyzer 17 under the effect of ballast pump and blood exchanges, and the waste liquid that cements out flows out by ballast pump again.Ballast pump guarantees that the dislysate that enters dialyzer 17 keeps absolute consistent at any time with the waste liquid turnover liquid measure of coming out from dialyzer 17, and the fluid flow that ballast pump is also controlled per minute turnover dialyzer 17 is the fixed value of needs, to guarantee to remove the effect of toxin.
Concrete principle of the present invention is:
Referring to Fig. 1, Fig. 3, when Ceramic piston 3 in the pump housing 5 during to left movement, can allow the cavity volume in Ceramic piston 3 left sides diminish, dislysate in the cavity is pushed first one-way valve 2 open and is flowed to dialyzer 17, and this moment, the cavity volume on Ceramic piston 3 right sides increased, and formed negative pressure and produced suction, the 3rd one-way valve 13 is opened, suck waste liquid from dialyzer 17, owing to the effect of pressure, second one-way valve 8 and the 4th one-way valve 15 can be in closed condition in this process.When Ceramic piston 3 moves right, can allow the cavity volume on Ceramic piston 3 right sides diminish, waste liquid in the cavity is pushed the 4th one-way valve 15 open, flow out from waste liquid drain pipe 19, this moment, the cavity volume in Ceramic piston 3 left sides increased, and formed negative pressure and produced suction, second one-way valve 8 is opened, suck dislysate from dislysate liquid inlet pipe 18, owing to the effect of pressure, first one-way valve 2 and the 3rd one-way valve 13 can be in closed condition in this process.Drive motor 11 whenever revolves to turn around can realize the suction and the discharge of the pump housing 5 inner chamber two ends dislysates and waste liquid, because the diameter of Ceramic piston 3 and the distance of move left and right are consistent all the time, so how much liquid an end of the pump housing 5 inner chambers discharges, how much liquid the other end also will suck, and then guaranteed the consistent at any time of two ends, the left and right sides into and out of liquid, guaranteed that the dialysis liquid measure and the waste liquid amount of turnover dialyzer 17 keeps balance.Because the volume of the pump housing 5 inner chambers is certain, need only the rotating speed of 11 unit time of controlling and driving motor, just can accurately control the fluid flow of unit time the right and left.
Fig. 3 only is a kind of Placement of the present invention in dialysis treatment, the present invention also can adopt first joint 1 to be connected by the waste liquid outlet of pipeline with dialyzer 17, second joint 9 is connected with waste liquid drain pipe 19, the 3rd joint 12 is connected with the dislysate inlet of dialyzer 17 by pipeline, and the 4th joint 16 is connected with dislysate liquid inlet pipe 18.
Claims (4)
1, a kind of capacity balancing pump for purifying blood, comprise drive motor (11), the pump housing (5) and Ceramic piston (3), it is characterized in that: the described pump housing (5) horizontal arrangement, the Ceramic piston of Spielpassung (3) with it is housed in the inner chamber of the pump housing (5), this Ceramic piston (3) can be in the inner chamber of the pump housing (5) move left and right, and chute is offered on radially in the middle part of Ceramic piston (3) bottom, slide block (4) is housed in the chute, described slide block (4) is connected with the upper end of eccentric shaft (6), the lower end of eccentric shaft (6) is fixed on the output shaft of drive motor (11), and this drive motor (11) is installed in the below of the pump housing (5) by motor fixing frame (10); End at the described pump housing (5) is symmetrical arranged first joint (1) and second joint (9), the other end of the pump housing (5) is symmetrical arranged the 3rd joint (12) and the 4th joint (16), the center hole of above-mentioned each joint all communicates with the inner chamber of the pump housing (5), and one-way valve is housed all in each joint, wherein the one-way valve in the first, the 4th joint (1,16) is controlled the outside one-way flow of liquid of the pump housing (5) inner chamber, and the liquid of the one-way valve control outside in second, third joint (9,12) is to the inner chamber one-way flow of the pump housing (5).
2, capacity balancing pump for purifying blood according to claim 1 is characterized in that: the inner chamber of the described pump housing (5) and Ceramic piston (3) are cylindrical, and both diameters adapt.
3, capacity balancing pump for purifying blood according to claim 2 is characterized in that: offer two symmetrical annular grooves on the inwall of the described pump housing (5), first seal ring (7) and second seal ring (14) are installed respectively in two annular grooves.
4, according to claim 1 or 2 or 3 described capacity balancing pump for purifying blood, it is characterized in that: the chute on the described Ceramic piston (3) is up-small and down-big stepped shape groove, slide block (4) is positioned at appearing on the stage the stage of this groove, and the center of slide block (4) offers mounting hole, and the upper end of described eccentric shaft (6) is stretched in this mounting hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100702530A CN101363435A (en) | 2008-09-08 | 2008-09-08 | Capacity balancing pump for purifying blood |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100702530A CN101363435A (en) | 2008-09-08 | 2008-09-08 | Capacity balancing pump for purifying blood |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101363435A true CN101363435A (en) | 2009-02-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008100702530A Pending CN101363435A (en) | 2008-09-08 | 2008-09-08 | Capacity balancing pump for purifying blood |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101363435A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102548595A (en) * | 2009-09-29 | 2012-07-04 | 德国弗雷泽纽斯医疗保健股份有限公司 | Device for dialysis treatment and method for balancing fresh and used dialysis liquid |
| CN102900664A (en) * | 2012-10-22 | 2013-01-30 | 贝恩医疗设备(广州)有限公司 | Balance pump |
| CN102895710A (en) * | 2012-10-22 | 2013-01-30 | 贝恩医疗设备(广州)有限公司 | Continuous flow balancing device |
| CN103251996A (en) * | 2013-04-02 | 2013-08-21 | 周春华 | Portable multiple organ support integration machine |
| CN103251993A (en) * | 2013-04-02 | 2013-08-21 | 周春华 | Automatic balancing displacement device used for supporting multiple organs |
| CN103883520A (en) * | 2014-03-27 | 2014-06-25 | 余文凌 | Rotor type immersible pump with eccentric shaft directly connected with motor |
-
2008
- 2008-09-08 CN CNA2008100702530A patent/CN101363435A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102548595A (en) * | 2009-09-29 | 2012-07-04 | 德国弗雷泽纽斯医疗保健股份有限公司 | Device for dialysis treatment and method for balancing fresh and used dialysis liquid |
| CN102548595B (en) * | 2009-09-29 | 2015-05-20 | 德国弗雷泽纽斯医疗保健股份有限公司 | Device for dialysis treatment and method for balancing fresh and used dialysis liquid |
| CN102900664A (en) * | 2012-10-22 | 2013-01-30 | 贝恩医疗设备(广州)有限公司 | Balance pump |
| CN102895710A (en) * | 2012-10-22 | 2013-01-30 | 贝恩医疗设备(广州)有限公司 | Continuous flow balancing device |
| CN102900664B (en) * | 2012-10-22 | 2015-11-18 | 贝恩医疗设备(广州)有限公司 | A kind of ballast pump |
| CN103251996A (en) * | 2013-04-02 | 2013-08-21 | 周春华 | Portable multiple organ support integration machine |
| CN103251993A (en) * | 2013-04-02 | 2013-08-21 | 周春华 | Automatic balancing displacement device used for supporting multiple organs |
| CN103251993B (en) * | 2013-04-02 | 2015-08-05 | 周春华 | For the self-balance displacement apparatus that multiple organ is supported |
| CN103251996B (en) * | 2013-04-02 | 2015-09-30 | 周春华 | Portable multiple organ support integration machine |
| CN103883520A (en) * | 2014-03-27 | 2014-06-25 | 余文凌 | Rotor type immersible pump with eccentric shaft directly connected with motor |
| CN103883520B (en) * | 2014-03-27 | 2016-06-22 | 余文凌 | The rotor-type submersible pump of eccentric shaft and motor direct connection |
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Application publication date: 20090211 |