CN102895710A - Continuous flow balancing device - Google Patents
Continuous flow balancing device Download PDFInfo
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- CN102895710A CN102895710A CN2012104034807A CN201210403480A CN102895710A CN 102895710 A CN102895710 A CN 102895710A CN 2012104034807 A CN2012104034807 A CN 2012104034807A CN 201210403480 A CN201210403480 A CN 201210403480A CN 102895710 A CN102895710 A CN 102895710A
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- joint
- check valve
- valve
- liquid
- ceramic piston
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- 239000007788 liquid Substances 0.000 claims abstract description 91
- 239000000919 ceramic Substances 0.000 claims abstract description 57
- 210000000988 bone and bone Anatomy 0.000 claims description 6
- 230000000295 complement effect Effects 0.000 claims description 3
- 238000000502 dialysis Methods 0.000 description 15
- 239000012530 fluid Substances 0.000 description 14
- 239000000385 dialysis solution Substances 0.000 description 12
- 230000000694 effects Effects 0.000 description 10
- 239000002699 waste material Substances 0.000 description 9
- 239000008280 blood Substances 0.000 description 8
- 210000004369 blood Anatomy 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 238000001631 haemodialysis Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 208000002925 dental caries Diseases 0.000 description 5
- 230000000322 hemodialysis Effects 0.000 description 5
- 238000007789 sealing Methods 0.000 description 3
- 230000001225 therapeutic effect Effects 0.000 description 3
- 230000007306 turnover Effects 0.000 description 3
- 230000007812 deficiency Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000003053 toxin Substances 0.000 description 2
- 231100000765 toxin Toxicity 0.000 description 2
- 208000030090 Acute Disease Diseases 0.000 description 1
- 208000001647 Renal Insufficiency Diseases 0.000 description 1
- 241000009298 Trigla lyra Species 0.000 description 1
- 230000001154 acute effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 208000022831 chronic renal failure syndrome Diseases 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 201000006370 kidney failure Diseases 0.000 description 1
- 230000003204 osmotic effect Effects 0.000 description 1
- 230000010349 pulsation Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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Abstract
The invention discloses a continuous flow balancing device which is provided with a first pump body, a second pump body, a double-head motor, a first drive device and a second drive device, wherein the first pump body is provided with a first end, a first pump cavity, a first ceramic piston and a second send; the first end is provided with a first joint and a second joint; the second end is provided with a third joint and a fourth joint; the first ceramic piston is in clearance assembled and moveably arranged in the first pump cavity; the second pump body is provided with a third end, a second pump cavity, a second ceramic piston and a fourth end; the third end is provided with a fifth joint and a sixth joint; the fourth end is provided with a seventh joint and an eighth joint; the standard sizes of the first, second, third and fourth ends are the same, and the standard sizes of the first, second, third, fourth, fifth, sixth, seventh and eighth joints are the same; the second ceramic piston is assembled in the second piston cavity in clearance; and the second joint and the fifth joint are connected to a first output pipeline, and the fourth joint and the seventh joint are connected to a second output pipeline. By using the device, the liquid in the pipeline can continuously flow at constant speed, and the flow equilibrium of a dialyzer is ensured.
Description
Technical field
The present invention relates to the armarium technical field, particularly relate to a kind of dialysis machine continuous flow bascule.
Background technology
Hemodialysis is one of effective means of the various acute and chronic renal failure diseases for the treatment of, by carrying out hemodialysis, and life-span that can the proper extension patient.Hemodialysis technology is relatively ripe, and the quality that further improves hemodialysis becomes one of developing direction of patients with renal failure treatment.
Carry out hemodialysis and usually adopt dialysis machine, dialyser and corresponding connecting line to carry out, arterial blood, dialysis solution enter in the dialyser respectively in dialyser.The flow direction of dialysis solution is opposite with direction of flow of blood in dialyser, blood and dialysis solution are under the pressure-acting of osmotic pressure and dialysis solution, toxin and moisture in the blood exchange, the dialysis solution that contains toxin is got rid of from the dialysis solution drain pipe, and the blood of dialysing is delivered to human vas again.In dialysis procedure, need to dialysis solution be pumped into dialyser and the waste liquid in the dialyser is pumped from dialyser by pump.Practice finds, need to guarantee to pass in and out fluid balance in the dialyser in order to ensure the dialysis treatment effect, and the unbalanced direct result of liquid can affect therapeutic effect even entail dangers to patient life in the turnover dialyser.
Chinese patent ZL 200820099919.0 provides a kind of capacity balancing pump for purifying blood, and the movement of the piston by the setting in the pump housing is carried out dialysis solution and pumped and suck.Because in actual the use, the outlet pressure of this capacity balancing pump for purifying blood changes greatly, can not effectively control the effect of damming of check valve, cause flow and uneven.In addition, the piston of this capacity balancing pump for purifying blood moves back and forth, dialysis solution only has half period to flow in whole device in the one-period, half period is static in addition, liquid can not continuous-flow in whole pipeline, so that pulsation phenomenon appears in dialysis solution be flowing in easily in the whole device.
Chinese patent ZL 02248916.9 provides a kind of ballast pump, this ballast pump comprises two cavitys, be separately installed with elastic film in two cavitys each cavity is separated into two mutual airtight spaces, two spatial placements of two cavitys have perforate and steam vent, the trace that is connected with drive motors passes perforate and is connected with elastic film in two cavitys respectively, and in addition two spaces of two cavitys are respectively arranged with water inlet and outlet.The linear electric motors of this ballast pump drive connecting rod and do equidistant straight reciprocating motion, when trace moves to a cavity direction, elastic film in this cavity is pressed to outer space, with the liquid in this outer space from the water outlet extrusion cavity, but the fluid flow that each time period extrudes in whole course of action is also unequal, thereby cause the even phenomenon generation of mass flow discrepancy in each time period in the pipeline, finally affect therapeutic effect.In addition, elastic film loss and catabiosis can occur afterwards service time for a long time, thereby affects the performance of flow equilibrium and the whole device of ballast pump.
Therefore, not enough for prior art, provide a kind of and can make again the dialysis solution continuous flow bascule that the continuously and smoothly is flowed in whole dialysis pipeline when when dialysis machine work, can keep flow equilibrium and to overcome very necessity of prior art deficiency.
Summary of the invention
The object of the invention is to avoid the deficiencies in the prior art part and a kind of continuous flow bascule be provided, this continuous flow bascule can so that dialysis machine when work dialysis solution continuously and smoothly in whole dialysis pipeline is flowed when keeping flow equilibrium.
Purpose of the present invention realizes by following technical measures.
A kind of continuous flow bascule is provided with first pump housing, second pump housing, double end motor, the first actuating device and the second actuating device;
Described double end motor is provided with motor shaft first end and motor shaft the second end;
Described first pump housing is provided with first end, the first pump chamber, the first Ceramic piston and the second end, and described first end, described the second end are arranged at the two ends of described the first pump chamber and are communicated with described the first pump chamber;
Described first end is provided with the first joint and the second joint that is communicated with described first end respectively, be provided with the first check valve in described the first joint so that the unidirectional inflow first end of liquid, be provided with the second check valve in described the second joint so that liquid from the unidirectional outflow of first end;
Described the second end is provided with the 3rd joint and the 4th joint that is communicated with described the second end respectively, be provided with the 3rd check valve in described the 3rd joint so that unidirectional inflow the second end of liquid, be provided with the 4th check valve in described the 4th joint so that liquid from the unidirectional outflow of the second end;
The assembling of described the first Ceramic piston gap also is movably set in described the first pump chamber, and described the first Ceramic piston is connected with described the first actuating device one end, and the described first actuating device other end is connected with described motor shaft first end;
Described second pump housing is provided with the 3rd end, the second pump chamber, the second Ceramic piston and the 4th end, and described the 3rd end, described the 4th end are arranged at the two ends of described the second pump chamber and are communicated with described the second pump chamber;
Described the 3rd end is provided with the 5th joint and the 6th joint that is communicated with described the 3rd end respectively, unidirectional inflow the 3rd end of liquid that is provided with the 5th check valve in described the 5th joint so that liquid from the unidirectional outflow of the 3rd end, is provided with the 6th check valve in described the 6th joint;
Described the 4th end is provided with the 7th joint and the 8th joint that is communicated with described the 4th joint respectively, unidirectional inflow the 4th end of liquid that is provided with the 7th check valve in described the 7th joint so that liquid from the unidirectional outflow of the 4th end, is provided with the 8th check valve in described the 8th joint;
Described first end, described the second end, described the 3rd end are identical with the specification of described the 4th end, and the specification of described the first joint, described the second joint, described the 3rd joint, described the 4th joint, described the 5th joint, described the 6th joint, described the 7th joint and described the 8th joint is identical;
The assembling of described the second Ceramic piston gap also is movably set in described the second pump chamber, and described the second Ceramic piston is connected with described the second actuating device one end, and the described second actuating device other end is connected with described motor shaft the second end;
Described the first joint and described the 6th joint are connected to the first intake line, described the 3rd joint and described the 8th joint are connected to the second intake line, described the second joint and described the 5th joint are connected to the input of the first output pipe, and described the 4th joint and described the 7th joint are connected to the input of the second output pipe.
Above-mentioned continuous flow bascule also is provided with the second counterbalance valve and the 4th counterbalance valve;
The input of described the second counterbalance valve is connected with the outfan of described the first output pipe, and described the 4th counterbalance valve is connected with the outfan of described the second output pipe.
The opening pressure of above-mentioned the second counterbalance valve, the 4th counterbalance valve is set to 40-60KPa.
The opening pressure of above-mentioned the second counterbalance valve, the 4th counterbalance valve is set to 50KPa.
Above-mentioned the first actuating device is set to the first eccentric shaft, described the first Ceramic piston is provided with the first groove, be equipped with the first slide block in described the first groove, described the first eccentric shaft one end is connected with described the first slide block, and the described first eccentric shaft other end is connected with described motor shaft first end;
Described the second actuating device is set to the second eccentric shaft, described the second Ceramic piston is provided with the second groove, be equipped with the second slide block in described the second groove, described the second eccentric shaft one end is connected with described the second slide block, and the described second eccentric shaft other end is connected with described motor shaft the second end.
In above-mentioned the first check valve, described the second check valve, described the 3rd check valve, described the 4th check valve, described the 5th check valve, described the 6th check valve, described the 7th check valve and described the 8th check valve at least one adopts the pull-type check valve;
Described pull-type check valve is provided with valve pocket and Elastic valve core, described Elastic valve core is provided with fastener, described Elastic valve core be assemblied in described valve pocket and described fastener be assemblied in described valve pocket an end so that described Elastic valve core can elastic telescopic to separate with described valve pocket or to fit.
Above-mentioned valve pocket is set to beveled structure, and described valve pocket comprises tube, umbrella flank and annular plate surface;
Described umbrella flank is made of plural rib, has the space between adjacent two ribs, and described rib is umbrella to be arranged, and an end of every root bone is fixedly connected with described annular plate surface, and the other end of every root bone is fixedly connected with described tube;
Described Elastic valve core also is provided with cylindrical portion, taper section and snap ring, and described cylindrical portion one end is fixedly connected with the small end of described taper section, and the described cylindrical portion other end is fixedly connected with described fastener, and the large end of described taper section is fixedly connected with described snap ring;
Described cylindrical portion is assemblied in described tube and described fastener snapping is assemblied in described tube one end, and described taper section is assemblied in described umbrella flank, and described snap ring is assemblied in described annular plate surface.
Above-mentioned annular plate surface is provided with the cannelure that is complementary with described snap ring, and described snap ring is assemblied in described cannelure.
Above-mentioned fastener is set to cone structure, and the diameter of described fastener is greater than the external diameter of described cylindrical portion.
The diameter of above-mentioned fastener is greater than the external diameter 3-6mm of described cylindrical portion.
A kind of continuous flow bascule of the present invention is provided with first pump housing, second pump housing, double end motor, the first actuating device and the second actuating device; Described double end motor is provided with motor shaft first end and motor shaft the second end; Described first pump housing is provided with first end, the first pump chamber, the first Ceramic piston and the second end, and described first end, described the second end are arranged at the two ends of described the first pump chamber and are communicated with described the first pump chamber; Described first end is provided with the first joint and the second joint that is communicated with described first end respectively, be provided with the first check valve in described the first joint so that the unidirectional inflow first end of liquid, be provided with the second check valve in described the second joint so that liquid from the unidirectional outflow of first end; Described the second end is provided with the 3rd joint and the 4th joint that is communicated with described the second end respectively, be provided with the 3rd check valve in described the 3rd joint so that unidirectional inflow the second end of liquid, be provided with the 4th check valve in described the 4th joint so that liquid from the unidirectional outflow of the second end; Described first end is identical with the specification of described the second end, and the specification of described the first joint, described the second joint, described the 3rd joint and described the 4th joint is identical; The assembling of described the first Ceramic piston gap also is movably set in described the first pump chamber, and described the first Ceramic piston is connected with described the first actuating device one end, and the described first actuating device other end is connected with described motor shaft first end; Described second pump housing is provided with the 3rd end, the second pump chamber, the second Ceramic piston and the 4th end, and described the 3rd end, described the 4th end are arranged at the two ends of described the second pump chamber and are communicated with described the second pump chamber; Described the 3rd end is provided with the 5th joint and the 6th joint that is communicated with described the 3rd end respectively, unidirectional inflow the 3rd end of liquid that is provided with the 5th check valve in described the 5th joint so that liquid from the unidirectional outflow of the 3rd end, is provided with the 6th check valve in described the 6th joint; Described the 4th end is provided with the 7th joint and the 8th joint that is communicated with described the 4th joint respectively, unidirectional inflow the 4th end of liquid that is provided with the 7th check valve in described the 7th joint so that liquid from the unidirectional outflow of the 4th end, is provided with the 8th check valve in described the 8th joint; Described the 3rd end is identical with the specification of described the 4th end, and the specification of described the 5th joint, described the 6th joint, described the 7th joint and described the 8th joint is identical; The assembling of described the second Ceramic piston gap also is movably set in described the second pump chamber, and described the second Ceramic piston is connected with described the second actuating device one end, and the described second actuating device other end is connected with described motor shaft the second end; Described the first joint and described the 6th joint are connected to the first intake line, described the 3rd joint and described the 8th joint are connected to the second intake line, described the second joint is connected with the input that described the 5th joint is connected to the first output pipe, and described the 4th joint is connected with the input that described the 7th joint is connected to the second output pipe.
This continuous flow bascule drives the first Ceramic piston, the second Ceramic piston by dual-axle motor and comes and goes respectively mobile in first pump housing, second pump housing, thereby control simultaneously flowing of liquid in the dialysis machine by two pump housings and realize that the continuously and smoothly flows, and liquid keeps flow to equate in the control turnover dialyser.
?
Description of drawings
The present invention is further illustrated to utilize accompanying drawing, but the content in the accompanying drawing does not consist of any limitation of the invention.
Fig. 1 is the structural representation of a kind of continuous flow bascule of the present invention;
Fig. 2 is the part-structure decomposing schematic representation of Fig. 1;
Fig. 3 is take the first ceramic plunger to the first end setting in motion as starting point, the flow sketch map of the second joint and the 7th joint outfan liquid when the present invention moves;
Fig. 4 is take the first ceramic plunger to the second end setting in motion as starting point, the flow sketch map of the 4th joint and the 5th joint outfan liquid when the present invention moves;
Fig. 5 is the present invention's flow sketch map of liquid in the system pipeline when moving;
Fig. 6 is the 7th joint design sketch map of a kind of continuous flow bascule of the present invention;
Fig. 7 is the decomposing schematic representation of the 7th joint of Fig. 3;
Fig. 8 is " A-A " cutaway view that removes the nut part of Fig. 3.
In Fig. 1 to Fig. 8, comprising:
First end 110,
The first joint 111, the second joint 112,
The first pump chamber 120,
The first Ceramic piston 121, the first groove 122, the first slide block 123,
The second end 130,
The 4th joint 132,
The 3rd end 210,
The 5th joint 211,
The second pump chamber 220,
The 4th end 230,
The 7th joint 700,
The 8th joint 232,
The first eccentric shaft 410,
The first output pipe 610, the second output pipe 620,
The second counterbalance valve 820, the 4th counterbalance valve 840,
The 7th joint input 710,
The 7th joint outfan 720,
The 7th check valve 730,
Locking nut 740.
The specific embodiment
The invention will be further described with the following Examples.
A kind of continuous flow bascule to shown in Figure 8, is provided with first pump housing, second pump housing, double end motor 300, the first actuating device and the second actuating device such as Fig. 1.For the better location of realizing, a support body can also be set, double end motor 300, first pump housing, second pump housing are arranged on the support body.
First pump housing is provided with first end 110, the first pump chamber 120, the first Ceramic piston 121 and the second end 130, and first end 110, the second end 130 are arranged at the two ends of the first pump chamber 120 and are communicated with the first pump chamber 120.
First end 110 is provided with the first joint 111 and the second joint 112 that is communicated with first end 110 respectively, be provided with the first check valve in the first joint 111 so that be provided with the second check valve in unidirectional inflow first end 110, the second joints 112 of liquid so that liquid from first end 110 unidirectional outflows.
The second end 130 is provided with the 3rd joint and the 4th joint 132 that is communicated with the second end 130 respectively, be provided with the 3rd check valve in the 3rd joint so that be provided with the 4th check valve in unidirectional inflow the second end of liquid 130, the four joints 132 so that liquid from the 130 unidirectional outflows of the second end.
The first Ceramic piston 121 gaps are assembled and are movably set in the first pump chamber 120, the first Ceramic pistons 121 and are connected with the first actuating device one end, and the first actuating device other end is connected with motor shaft first end 310.
Concrete, the first actuating device is set to the first eccentric shaft 410, the first Ceramic piston 121 is provided with the first groove 122, be equipped with the first slide block 123 in the first groove 122, the first eccentric shaft 410 1 ends are connected with the first slide block 123, and the first eccentric shaft 410 other ends are connected with motor shaft first end 310.
Second pump housing is provided with the 3rd end 210, the second pump chamber 220, the second Ceramic piston and the 4th end 230, the three ends 210, the 4th end 230 and is arranged at the two ends of the second pump chamber 220 and is communicated with the second pump chamber 220.
The 3rd end 210 is provided with the 5th joint 211 and the 6th joint that is communicated with the 3rd end 210 respectively, unidirectional inflow the 3rd end 210 of liquid that is provided with the 5th check valve in the 5th joint 211 so that liquid from the 210 unidirectional outflows of the 3rd end, is provided with the 6th check valve in the 6th joint.
The 4th end 230 is provided with the 7th joint 700 and the 8th joint 232 that is communicated with the 4th joint 132 respectively, unidirectional inflow the 4th end 230 of liquid that is provided with the 7th check valve 730 in the 7th joint 700 so that liquid from the 230 unidirectional outflows of the 4th end, is provided with the 8th check valve in the 8th joint 232.
First end 110, the second end 130, the 3rd end 210 are identical with the specification of the 4th end 230, and the specification of the first joint 111, the second joint 112, the 3rd joint, the 4th joint 132, the 5th joint 211, the 6th joint, the 7th joint 700 and the 8th joint 232 is identical.
Need to prove that first end 110, the second end 130 can be symmetricly set in the first pump chamber 120 both sides, the 3rd end 210 and the 4th end 230 are symmetricly set in the second pump chamber 220 both sides, but are not limited to this positional structure, also can be other unsymmetric structure.The first joint 111, the second joint 112, the 3rd joint, the 4th joint 132, the 5th joint 211, the 6th joint, the 7th joint 700 and the 8th joint 232 can be set to the centrosymmetry joint, also can be other positional structure.
The second Ceramic piston gap is assembled and is movably set in the second pump chamber 220, the second Ceramic pistons and is connected with the second actuating device one end, and the second actuating device other end is connected with motor shaft the second end 320.
Concrete, the second actuating device is set to the second eccentric shaft, and the second Ceramic piston is provided with the second groove, is equipped with the second slide block in the second groove, and the second eccentric shaft one end is connected with the second slide block, and the second eccentric shaft other end is connected with motor shaft the second end 320.
The first joint 111 and the 6th joint are connected to the first intake line, the 3rd joint and the 8th joint 232 are connected to the second intake line, the second joint 112 and the 5th joint 211 are connected to the input of the first output pipe 610, and the 4th joint 132 and the 7th joint 700 are connected to the input of the second output pipe 620.
Connect for convenient, each joint can be connected to corresponding the first intake line, the second intake line, the first output pipe 610 or the second output pipe 620 by one section connection tube.Can be connected to by one section connection tube the input of the first output pipe 610 such as the second joint 112, the 5th joint 211 can be connected to one section connection tube the input of the first output pipe.
During actual the use, the first intake line is connected with the fresh liquid intake line, fresh liquid pumps into then the pump housing is delivered to dialyser by the first output pipe 610 fresh liquid input by the first intake line.The second input channel is connected with dialyser waste liquid outfan, pumps from the second output pipe 620 through the pump housing through the waste liquid after the dialysis.In order to ensure dialysis-effect, need to guarantee the output of the first output pipe 610 and the output balance of the second output pipe 620.
This continuous flow bascule, the first intake line is connected with the fresh liquid device in volume fresh liquid is inputed to respectively first end 110 and the 3rd end 210 by the first joint 111, the 6th joint during work, and fresh liquid pumps the fresh liquid input that is delivered to dialyser to the first output pipe 610 by the first output pipe 610 from the second joint 112, the 5th joint 211; The waste liquid of discharging from dialyser then inputs to respectively the second end 130 and the 4th end 230 by the second intake line through the 3rd joint, the 8th joint 232, and waste liquid is discharged from the 4th joint 132, the 7th joint 700, discharges by the second output pipe 620.
When 300 work of double end motor, driving the first eccentric shaft 410 drives the first Ceramic piston 121 such as motor shaft first end 310 moves towards first end 110, this moment, first end 110 internal liquids were compressed, fluid pressure in the first end 110 is opened the second umbrella valve, and the liquid in the first joint 111 is discharged from the second joint 112.Because the first Ceramic piston 121 moves towards the first joint 111, at this moment, the cavity volume in the second end 130 increases and forms negative pressure, and the 4th umbrella valve is closed, and the 3rd umbrella valve is opened, and outside liquid enters the second end 130 from the 3rd joint.
Accordingly, electrode axis the second end 320 also drives the second eccentric shaft and drives the second Ceramic piston and move towards the 4th end 230, this moment, the 4th end 230 interior cavity volumes dwindled, fluid pressure in the 4th end 230 increases, the 7th check valve 730 in the 7th joint 700 is opened, the 8th closed check valve, and the liquid in the 4th end 230 is discharged by the 7th joint 700.At this moment, the cavity volume in the 3rd end 210 increases, the 3rd end 210 interior formation negative pressure, and the 5th umbrella valve is closed, the 6th umbrella valve is opened, and outside liquid enters the 3rd end 210 from the 6th joint.
Because this continuous flow bascule adopts identical the first pump chamber 120 and the second pump chamber 220 of specification, adopt identical first end 110, the second end 130, the 3rd end 210 and the 4th end 230 of specification, adopt identical the first joint 111, the second joint 112, the 3rd joint, the 4th joint 132, the 5th joint 211, the 6th joint, the 7th joint 700 and the 8th joint 232 of specification.
So in one-period, the waste liquid amount F4 that flows out from the 4th joint 132 exits equates namely with the fresh liquid measure X2 that flows out from the second joint 112 exits:
F4=?X2；
In like manner, the waste liquid amount F7 that flows out from the 7th joint 700 in one-period equates namely with the fresh liquid measure X5 that flows out from the 5th joint 211 exits:
F7=?X5；
Can draw thus:
F4+ F7=X5+ X2; Be that the waste liquid amount that flows out in the dialyser system in the one-period equates with the fresh liquid measure of inflow, thereby can determine whole dialyser flow system flow balance.
Because the 4th joint 132 and the 7th joint 700 are connected on the same pipeline, the second joint 112 and the 5th joint 211 also are connected on the same pipeline, can determine that finally the waste liquid amount that flows out in the pipeline equates with the fresh liquid measure of inflow, thus the balance of flow in can accuracy-control system.
This continuous flow bascule since be by a double end motor 300 drive respectively the first Ceramic piston 121, the second Ceramic piston moves around in the same direction, when the first Ceramic piston 121 moves towards first end 110, so that first end 110, the 4th end 230 cavity volume diminish, liquid in first end 110, the 4th end 230 is pushed respectively the second check valve open, the 7th check valve outwards flows out, and its flow sketch map as shown in Figure 3.
At this moment, the first Ceramic piston 121, the cavity volume that the second Ceramic piston opposite side is corresponding increase, thereby form negative pressure and produce suction the 3rd check valve and the 6th one-way valve opens are sucked liquid, in this process, because all the other check valves of effect of pressure are in closed condition, the fluid flow at the 4th joint 132 and the 5th joint 211 places as shown in Figure 4 at this moment.
Because the second joint 112 and the 5th joint 211 at whole device middle outlet place are connected on the first output pipe 610, the 4th joint 132 and the 7th joint 700 are connected on the second output pipe 620, so the flow in the pipeline is the total flow sum that two joints process of flowing through, can draw in one-period, fluid flow sketch map in each moment pipeline as shown in Figure 5, as seen this continuous flow ballast pump at work, each flow constantly is balanced, can guarantee that like this flow rate of liquid is uniform and stable in dialysis procedure.
In like manner, when the first Ceramic piston 121, the second Ceramic piston oppositely move to the second end 130, so that the first Ceramic piston 121, cavity volume corresponding to the second Ceramic piston opposite side diminish, liquid in the second end 130, the 3rd end 210 pushes the 5th check valve open and the 7th check valve 730 outwards flows out, this moment, Ceramic piston opposite side cavity volume increased, form negative pressure and produce suction with the first check valve and the 3rd one-way valve opens suction liquid, all the other check valves of effect owing to pressure in this process are in closed condition.And when second joint 112 in whole device exit and the 5th joint 211, be connected to each other on same pipeline, the 4th joint 132 and the 7th joint 700 are connected to each other on same pipeline, so can guarantee that the liquid in the whole process pipeline is continuous-flow.
The first check valve of this continuous flow bascule, the second check valve, the 3rd check valve, the 4th check valve, the 5th check valve, the 6th check valve, the 7th check valve 730 and the 8th check valve all adopt the pull-type check valve, to improve one-way flow control effect, prevent the liquid reverse flow.
Need to prove, the first check valve, the second check valve, the 3rd check valve, the 4th check valve, the 5th check valve, the 6th check valve, the 7th check valve 730 and the 8th check valve also can arrange wherein some or a plurality of for the pull-type check valve, but to be pull-type check valve best results.
The pull-type check valve as shown in Figure 8, be provided with valve pocket 731 and Elastic valve core 732, Elastic valve core 732 is provided with fastener 7321, Elastic valve core 732 be assemblied in valve pocket 731 and fastener 7321 be assemblied in valve pocket 731 an end so that Elastic valve core 732 can elastic telescopic to separate with valve pocket 731 or to fit.
The Elastic valve core 732 of this pull-type check valve is by arranging fastener 7321, and fastener 7321 assembles with valve pocket 731, and when fluid pressure reaches certain threshold values, fluid pressure will be washed Elastic valve core 732 open so that Elastic valve core 732 separates with valve pocket 731.Since fastener 7321 stretch the effect of drawing, the pressure that produces during the ballast pump action can not reach this dialysis with the opening pressure of check valve, thereby can better control the liquid one-way flowing phenomenon generation that prevents from flowing backwards.
In addition because the end assembling of fastener 7321 and valve pocket 731, the pulling force effect of fastener 7321 will so that Elastic valve core 732 not can with valve pocket 731 between separate and excessively depart from, can prevent to a certain extent Elastic valve core 732 distortion.
In addition, because the existence of fastener 7321, Elastic valve core 732 leaves the distance of valve pocket 731 and can unrestrictedly not leave, and is convenient to the liquid with precise control flow.
Concrete, valve pocket 731 is set to beveled structure, and valve pocket 731 comprises tube 7311, umbrella flank 7312 and annular plate surface.
Usually, the diameter of fastener 7321 can satisfy the demands greater than the external diameter 2-10mm of cylindrical portion 7322, the diameter of preferred fastener 7321 is greater than the external diameter 3-6mm of cylindrical portion 7322, and the actual size of fastener 7321 and cylindrical portion 7322 can determine flexibly according to concrete needs.
Preferably, tube 7311, umbrella flank 7312 and annular plate surface are set to integrated formed structure, have characteristics simple in structure, easy to assembly.
Preferably, fastener 7321, cylindrical portion 7322, taper section 7323 and snap ring 7324 are set to integrated formed structure, have characteristics simple in structure, easy to assembly.
The assembling mode of explanation pull-type check valve as an example of the 7th joint 700 example, the 7th joint 700 is provided with the 7th joint input 710, the 7th joint outfan 720, the 7th check valve 730, locking nut 740, consist of valve pocket between the 7th joint input 710 and the 7th joint outfan 720, the 7th check valve 730 is assemblied in valve pocket.For so that the assembling of the 7th joint 700 is more firm, the outside wall surface of the 7th joint input 710 is provided with screw thread 711, when the 7th joint outfan 720 is assemblied in the 7th joint input 710, the 7th check valve 730 is assemblied in valve pocket simultaneously, is tightened in screw thread 711 by locking nut 740 and can realizes good fixing.
For liquid with precise control one-way flow more, the phenomenon that prevents from flowing backwards occurs, and this continuous flow bascule also is provided with the second counterbalance valve 820, the 4th counterbalance valve 840.The structure of counterbalance valve is general knowledge known in this field, does not repeat them here.
The outfan of the first output pipe 610 is connected with the input of the second counterbalance valve 820, and the outfan of the second output pipe 620 is connected with the input of the 4th counterbalance valve 840.
The opening pressure of the second counterbalance valve 820, the 4th counterbalance valve 840 is set to 40-60KPa, specifically can be set to other numerical value between 40KPa, 60KPa, 50KPa or this scope.
This continuous flow bascule except the pull-type check valve is set, also is provided with counterbalance valve.Counterbalance valve the opening pressure threshold value that has improved the pull-type check valve is set, namely only have when the pressure of liquid during greater than the opening pressure of counterbalance valve, liquid just can carry out one-way flow.
By increasing counterbalance valve, for the pull-type check valve provides a stable pressure-regulating device, can control more efficiently and effectively circulation and the cut-off of liquid.Could conducting when the pressure that provides when pump is be provided greater than the conducting pressure of counterbalance valve, liquid just can flow out from the exit of counterbalance valve, in case the pressure that provides during less than the conducting pressure of counterbalance valve then the pull-type check valve close at once, liquid stops to flow.
In the dialyser technical field, usually by design check valve is arranged at corresponding liquid one-way flowing pipeline, think in theory and can realize that by check valve liquid is set one-way flow the phenomenon that flows backwards can not occur.But practice is found, directly be connected with a conduit and vertical placement when the check valve of selecting two kinds of unlike materials to make exports it, the joint input is equipped with water column down in the conduit, owing to the effect of check valve one-way flow, the water column in the conduit should not flow backwards and flow out from input in theory.But practical situation is: a kind of check valve of material is until water column just can be accomplished good sealing effectiveness during greater than 40 centimetres, can occur the more serious phenomenon of leakage at water column less than 40 centimetres of interval check valves of this section, and the check valve of another kind of material is until water column just can be accomplished good sealing effectiveness during greater than 20 centimetres.
If water-column is considerably beyond 40 centimetres, the check valve made of the two kinds of materials seepage that all do not flow backwards fully then.
So set up counterbalance valve, increase by a counterbalance valve on the check valve basis, when counterbalance valve is adjusted to certain pressure, dialysis can be realized good sealing effectiveness with check valve.Not only can get rid of the impact that the check valve of unlike material causes the whole system flow by increasing counterbalance valve, and the one-way flow of liquid with precise control more.
The dialysis that two kinds of materials are prepared from is installed on the compound ballast pump of haemodialysis control unit with unidirectional control device, when flow system flow during at 30 L/h, when the counterbalance valve at ballast pump outlet two ends is adjusted to 80KPa, the total amount of liquid difference that records the ballast pump two ends of flowing through after a hour through experiment repeatedly is no more than 20ml, error rate is no more than 0.067%, as seen the error rate that increases behind the counterbalance valve is in the allowed band of machine, realized flow is controlled accurately, realized good therapeutic effect.
Counterbalance valve can be realized good control effect to the flow equilibrium of whole system.The size of back pressure pressure regulating valve and the flow of system, the pressure size of the caliber of conduit and the porch of ballast pump is relevant.Thereby user also can reach reasonable control effect when can make this device be fit to various environment according to the pressure of above condition adjusting counterbalance valve.
Because lateral area S and the stroke L of Ceramic piston can determine that operating frequency f is known, thus can accurately determine in the system pipeline fluid flow namely:
Q=2SLf
Q represents in the formula is fluid flow in the system pipeline;
What f represented is the operating frequency of Ceramic piston;
L represents is the stroke of piston in the pump housing when at every turn moving;
What S represented is the lateral area of Ceramic piston.
Because thereby the flow of the pump housing can be determined also the flow velocity of liquid in the better control piper.So can control the movement velocity of ceramic plunger in the pump housing by the frequency of electric machine rotation, and then can control accurately the flow velocity of liquid in pipeline, realize accurate control fluid flow and continuous-flow in pipeline.
In sum, can control liquid one-way flowing by increasing counterbalance valve, prevent from flowing backwards, thereby realize that the continuously and smoothly flows thereby can more accurately control flowing of liquid in the dialysis machine, and liquid keeps flow to equate also have simple in structure, with low cost, easy to operate characteristics in the control turnover dialyser.This continuous flow bascule adopts Ceramic piston, and anti-wear performance is good, biology performance is good, and the error that life-time service produces is also very little.
Should be noted that at last; above embodiment is only in order to illustrate technical scheme of the present invention but not limiting the scope of the invention; although with reference to preferred embodiment the present invention has been done detailed description; those of ordinary skill in the art is to be understood that; can make amendment or be equal to replacement technical scheme of the present invention, and not break away from essence and the scope of technical solution of the present invention.
Claims (10)
1. a continuous flow bascule is characterized in that: be provided with first pump housing, second pump housing, double end motor, the first actuating device and the second actuating device;
Described double end motor is provided with motor shaft first end and motor shaft the second end;
Described first pump housing is provided with first end, the first pump chamber, the first Ceramic piston and the second end, and described first end, described the second end are arranged at the two ends of described the first pump chamber and are communicated with described the first pump chamber;
Described first end is provided with the first joint and the second joint that is communicated with described first end respectively, be provided with the first check valve in described the first joint so that the unidirectional inflow first end of liquid, be provided with the second check valve in described the second joint so that liquid from the unidirectional outflow of first end;
Described the second end is provided with the 3rd joint and the 4th joint that is communicated with described the second end respectively, be provided with the 3rd check valve in described the 3rd joint so that unidirectional inflow the second end of liquid, be provided with the 4th check valve in described the 4th joint so that liquid from the unidirectional outflow of the second end;
The assembling of described the first Ceramic piston gap also is movably set in described the first pump chamber, and described the first Ceramic piston is connected with described the first actuating device one end, and the described first actuating device other end is connected with described motor shaft first end;
Described second pump housing is provided with the 3rd end, the second pump chamber, the second Ceramic piston and the 4th end, and described the 3rd end, described the 4th end are arranged at the two ends of described the second pump chamber and are communicated with described the second pump chamber;
Described the 3rd end is provided with the 5th joint and the 6th joint that is communicated with described the 3rd end respectively, unidirectional inflow the 3rd end of liquid that is provided with the 5th check valve in described the 5th joint so that liquid from the unidirectional outflow of the 3rd end, is provided with the 6th check valve in described the 6th joint;
Described the 4th end is provided with the 7th joint and the 8th joint that is communicated with described the 4th joint respectively, unidirectional inflow the 4th end of liquid that is provided with the 7th check valve in described the 7th joint so that liquid from the unidirectional outflow of the 4th end, is provided with the 8th check valve in described the 8th joint;
Described first end, described the second end, described the 3rd end are identical with the specification of described the 4th end, and the specification of described the first joint, described the second joint, described the 3rd joint, described the 4th joint, described the 5th joint, described the 6th joint, described the 7th joint and described the 8th joint is identical;
The assembling of described the second Ceramic piston gap also is movably set in described the second pump chamber, and described the second Ceramic piston is connected with described the second actuating device one end, and the described second actuating device other end is connected with described motor shaft the second end;
Described the first joint and described the 6th joint are connected to the first intake line, described the 3rd joint and described the 8th joint are connected to the second intake line, described the second joint and described the 5th joint are connected to the input of the first output pipe, and described the 4th joint and described the 7th joint are connected to the input of the second output pipe.
2. continuous flow bascule according to claim 1 is characterized in that: also be provided with the second counterbalance valve and the 4th counterbalance valve;
The input of described the second counterbalance valve is connected with the outfan of described the first output pipe, and described the 4th counterbalance valve is connected with the outfan of described the second output pipe.
3. continuous flow bascule according to claim 2, it is characterized in that: the opening pressure of described the second counterbalance valve, described the 4th counterbalance valve all is set to 40-60KPa.
4. continuous flow bascule according to claim 3, it is characterized in that: the opening pressure of described the second counterbalance valve, described the 4th counterbalance valve all is set to 50KPa.
5. continuous flow bascule according to claim 1, it is characterized in that: described the first actuating device is set to the first eccentric shaft, described the first Ceramic piston is provided with the first groove, be equipped with the first slide block in described the first groove, described the first eccentric shaft one end is connected with described the first slide block, and the described first eccentric shaft other end is connected with described motor shaft first end;
Described the second actuating device is set to the second eccentric shaft, described the second Ceramic piston is provided with the second groove, be equipped with the second slide block in described the second groove, described the second eccentric shaft one end is connected with described the second slide block, and the described second eccentric shaft other end is connected with described motor shaft the second end.
6. according to claim 1 to the described afterflow rate bascule of 5 any one, it is characterized in that: at least one in described the first check valve, described the second check valve, described the 3rd check valve, described the 4th check valve, described the 5th check valve, described the 6th check valve, described the 7th check valve and described the 8th check valve adopts the pull-type check valve;
Described pull-type check valve is provided with valve pocket and Elastic valve core, described Elastic valve core is provided with fastener, described Elastic valve core be assemblied in described valve pocket and described fastener be assemblied in described valve pocket an end so that described Elastic valve core can elastic telescopic to separate with described valve pocket or to fit.
7. afterflow rate bascule according to claim 6 is characterized in that:
Described valve pocket is set to beveled structure, and described valve pocket comprises tube, umbrella flank and annular plate surface;
Described umbrella flank is made of plural rib, has the space between adjacent two ribs, and described rib is umbrella to be arranged, and an end of every root bone is fixedly connected with described annular plate surface, and the other end of every root bone is fixedly connected with described tube;
Described Elastic valve core also is provided with cylindrical portion, taper section and snap ring, and described cylindrical portion one end is fixedly connected with the small end of described taper section, and the described cylindrical portion other end is fixedly connected with described fastener, and the large end of described taper section is fixedly connected with described snap ring;
Described cylindrical portion is assemblied in described tube and described fastener snapping is assemblied in described tube one end, and described taper section is assemblied in described umbrella flank, and described snap ring is assemblied in described annular plate surface.
8. continuous flow bascule according to claim 7, it is characterized in that: described annular plate surface is provided with the cannelure that is complementary with described snap ring, and described snap ring is assemblied in described cannelure.
9. continuous flow bascule according to claim 8, it is characterized in that: described fastener is set to cone structure, and the diameter of described fastener is greater than the external diameter of described cylindrical portion.
10. continuous flow bascule according to claim 9, it is characterized in that: the diameter of described fastener is greater than the external diameter 3-6mm of described cylindrical portion.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210403480.7A CN102895710B (en) | 2012-10-22 | 2012-10-22 | Continuous flow balancing device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210403480.7A CN102895710B (en) | 2012-10-22 | 2012-10-22 | Continuous flow balancing device |
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| CN102895710A true CN102895710A (en) | 2013-01-30 |
| CN102895710B CN102895710B (en) | 2014-11-05 |
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| CN201210403480.7A Active CN102895710B (en) | 2012-10-22 | 2012-10-22 | Continuous flow balancing device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103251996A (en) * | 2013-04-02 | 2013-08-21 | 周春华 | Portable multiple organ support integration machine |
| CN113332592A (en) * | 2021-06-04 | 2021-09-03 | 丰凯医疗器械（上海）有限公司 | Catheter pump assembly |
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| CN1404882A (en) * | 2002-10-28 | 2003-03-26 | 尹良红 | Balancing pump and its driving method and use |
| CN101363435A (en) * | 2008-09-08 | 2009-02-11 | 重庆山外山科技有限公司 | Capacity balancing pump for purifying blood |
| WO2010027437A2 (en) * | 2007-02-27 | 2010-03-11 | Deka Products Limited Partnership | Blood treatment systems and methods |
| US7704054B2 (en) * | 2006-04-26 | 2010-04-27 | The Cleveland Clinic Foundation | Two-stage rotodynamic blood pump |
| CN202909175U (en) * | 2012-10-22 | 2013-05-01 | 贝恩医疗设备(广州)有限公司 | Continuous flow equilibrium device |
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2012
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1404882A (en) * | 2002-10-28 | 2003-03-26 | 尹良红 | Balancing pump and its driving method and use |
| US7704054B2 (en) * | 2006-04-26 | 2010-04-27 | The Cleveland Clinic Foundation | Two-stage rotodynamic blood pump |
| WO2010027437A2 (en) * | 2007-02-27 | 2010-03-11 | Deka Products Limited Partnership | Blood treatment systems and methods |
| CN101363435A (en) * | 2008-09-08 | 2009-02-11 | 重庆山外山科技有限公司 | Capacity balancing pump for purifying blood |
| CN202909175U (en) * | 2012-10-22 | 2013-05-01 | 贝恩医疗设备(广州)有限公司 | Continuous flow equilibrium device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103251996A (en) * | 2013-04-02 | 2013-08-21 | 周春华 | Portable multiple organ support integration machine |
| CN113332592A (en) * | 2021-06-04 | 2021-09-03 | 丰凯医疗器械（上海）有限公司 | Catheter pump assembly |
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| Publication number | Publication date |
|---|---|
| CN102895710B (en) | 2014-11-05 |
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