CN209967214U

CN209967214U - Draw-in groove pump balanced liquid supply and distribution system

Info

Publication number: CN209967214U
Application number: CN201920403165.1U
Authority: CN
Inventors: 云琛; 尹良红; 云大信
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-03-28
Filing date: 2019-03-28
Publication date: 2020-01-21
Anticipated expiration: 2029-03-28

Abstract

The utility model discloses a balanced confession liquid system that joins in marriage of draw-in groove pump, the inside partition of cerini dialyser cerini is blood room and dislysate room, and the blood room passes through the blood road pipe and links to each other with the blood vessel, and dislysate room one end is led to with the dislysate pump, and the dislysate room other end leads to with dislysate waste liquid pump, and the drain pipe of a plurality of concentrated liquid pumps leads to with the dislysate pump, and dislysate waste liquid pump, dislysate liquid pump and concentrated liquid pump are rotatory by motor drive, the utility model discloses a reverse osmosis water is introduced to motor drive dislysate pump, introduces the concentrated liquid through the concentrated liquid pump simultaneously and mixes and form the dislysate with reverse osmosis water again, takes place the isotonic exchange of material with the inside blood of hemodialyzer. Compared with the prior art, the utility model discloses technical scheme has advantages such as continuous uninterrupted liquid supply, no pressure fluctuation, join in marriage liquid accuracy, can effectively improve draw-in groove pump balance liquid supply and join in marriage liquid system performance.

Description

Draw-in groove pump balanced liquid supply and distribution system

Technical Field

The utility model relates to a blood purification technical field, in particular to balanced confession liquid of draw-in groove pump joins in marriage liquid system.

Background

In the prior art, a hemodialysis treatment system generally consists of a blood loop and a dialysate loop, wherein the intersection point of the two loops is arranged in a dialyzer, the blood loop penetrates into a blood vessel of a human body by using a puncture needle, the puncture needle is connected with a blood pump by a dialysis pipeline, blood is led out from the body of a patient under the driving action of the blood pump, and the blood returns to the body of the patient again after passing through a blood chamber of the dialyzer to form a circulation loop; the dialysate circuit uses a corresponding dialysis device, and under the condition of controllable flow, the prepared standard dialysate is introduced into a dialysate chamber of the dialyzer, and as the blood and the dialysate undergo isotonic substance exchange in the dialyzer, the exchanged dialysate (also called waste liquid) is led out of the dialyzer and returned into the dialysis device.

Dialysis treatment mainly comprises three purposes, the first is to extract the accumulated toxin molecular substances in the patient, the second is to ultrafiltrate the residual excessive water in the patient, and the third is to correct the disordered electrolyte concentration in the patient's blood after four hours of treatment.

In addition, the amount of dialysate entering the dialyzer must be consistent with the amount of solution drawn from the dialyzer, otherwise over-out, under-out, or even back-out will occur. The excessive excess refers to excessive water extraction from the patient body in the treatment process, the insufficient excess refers to less water extraction from the patient body in the treatment process, and the reverse excess refers to that the water is not extracted from the patient body but the solution is filled into the patient body in the treatment process, and the reverse excess can cause serious medical accidents.

The hemodialysis apparatus of the prior art is mainly divided into two types according to the characteristics of liquid preparation and liquid supply, wherein one type is a dialysis device with balanced cavity capacity manufactured by the fisher-ews company of germany technology, and the other type is a hemodialysis machine manufactured by the sweden jinbao company and controlled by an electromagnetic flowmeter. Among them, german fisheries applied for US patent on 18/3/1994, entitled "blood dialysis having a single blood cell chamber and method of dialysis having a thermal property" US5522998A ", and applied for US patent on 6/8/2003, entitled" Balance chamber for a device connecting fluids in an annular device ", whose disclosure is" EP1393761a1 ", and chinese applied for" a device for liquid level detection and Balance device for Hemodialysis "on 14/1/2011, by seikoshan scientific limited, china, whose disclosure is" CN102068722A ".

The above mentioned patents are all dialysis systems which utilize the principle of the balance cavity to realize the balanced liquid supply of the dialysate, the principle is that in a cavity with a fixed volume, the interior of the cavity is divided into two spaces by an elastic hollow fiber membrane, one of the two spaces is a clean dialysate space, the other space is a used dialysate waste liquid space, because the two spaces are respectively provided with a water inlet and a water outlet, when the clean dialysate enters into the clean dialysate space, the elastic hollow fiber membrane arranged in the middle is pushed to the other space, and the solution in the dialysate waste liquid space is extruded, in addition, when the dialysate waste liquid space is extruded into the dialysate waste liquid space, the elastic membrane is also pushed to the other space in a reverse direction, and the clean dialysate in the dialysate space is extruded. Therefore, the volume of the balance cavity is unchanged, and the amount of the solution entering and the amount of the solution extruding are consistent, so that the dialysate supply balance is formed. Therefore, the method for realizing continuous dialysate supply by the mutual alternate work of the two balance chambers has the advantages that the solution flow of the two balance chambers always stops from zero to the maximum value in the switching process of the solution between the systems, so that the water pressure fluctuates from zero to the maximum value, and the fluctuation can cause large fluctuation of the blood pressure of a patient when blood in a dialyzer contacts with the blood to influence the use comfort of the user.

Meanwhile, in the dialysis equipment (models are AK95, AK100, AK200, etc.) produced by swedish jinbao company in the prior art, the product of the company controls the flow of dialysate and dialysis waste liquid through components such as a precise electromagnetic flowmeter, an electric sensing flowmeter, a pressure sensor, an electromagnetic valve, an overflow valve, a flow limiting valve, a gear pump, etc., and the complex and precise electric control system can realize precise control of the flow, but the defects of high manufacturing cost, complex maintenance, high maintenance cost, etc. exist. In addition, the main parts of the gear pump in the prior art comprise a driving gear and a driven gear, the driving gear drives the driven gear to rotate, the gear pump carries a small amount of solution through the inter-tooth space of the driving gear and the driven gear, the inner wall of a pump shell is used as a limiting part, the solution in the inter-tooth space is extruded to be conveyed from one end of the gear to the other end of the gear through the meshing of the driving gear and the driven gear, but the gear pump only can carry a small amount of solution due to the small inter-tooth space, if higher flow is to be achieved, high-speed rotation is needed, but the gear pump is difficult to control the rotating speed of a motor to achieve. The center distance between the driving rotating mechanism and the driven rotating mechanism of the gear pump and the vane pump must be fixed, and the driving gear and the driven gear or the driving blade and the driven blade are meshed with each other but cannot be clamped with each other, so that the manufacturing cost is correspondingly increased due to higher process requirements.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a continuous uninterrupted liquid supply, no pressure fluctuation, join in marriage liquid accuracy, supply balanced, same power supply drive, cost with low costs, the volume is less, the balanced liquid system of joining in marriage of draw-in groove pump that the performance operation is stable supplies liquid system of joining in marriage, aim at improving the balanced liquid system performance that supplies of draw-in groove pump.

For realizing the above-mentioned purpose, the utility model provides a balanced confession liquid of draw-in groove pump joins in marriage liquid system, including cerini dialyser cerini, dialysis waste liquid pump, dislysate pump and a plurality of concentrate pump, the internal partition of cerini dialyser cerini is blood room and dislysate room, the blood room passes through the blood circuit pipe and links to each other with patient's blood vessel, dislysate room one end with the play liquid pipe of dislysate pump leads to even, the dislysate room other end with the feed liquor pipe of dislysate pump leads to even, a plurality of the drain liquor pipe of concentrate pump with the feed liquor pipe of dislysate pump leads to even, the dislysate pump and the concentrate pump is rotatory.

Preferably, the dialysis waste liquid pump, the dialysate pump and the concentrate pump are all draw-in groove pumps of which the internal structures can relatively rotate so as to absorb or extrude solution, each draw-in groove pump comprises a pump shell and an inner rotor, wherein the pump shell is internally provided with a containing cavity, the inner rotor is axially arranged at the center, an annular inter-cavity is formed between the outer peripheral surface of the inner rotor and the inner peripheral surface of the containing cavity, a plurality of liquid pushing pieces are uniformly arranged in the circumferential direction of the outer peripheral surface of the inner rotor and rotate along with the inner rotor, the liquid pushing pieces are attached to the inner peripheral surface of the containing cavity so as to divide the inter-cavity into a plurality of independent spaces, a plurality of liquid blocking pieces are arranged on the inner peripheral surface of the pump shell and are matched with the liquid pushing pieces to generate negative pressure suction solution or generate high pressure extrusion solution.

Preferably, the liquid pushing piece and/or the liquid blocking piece are elastic moving parts.

Preferably, the outer peripheral surface of the inner rotor and/or the inner peripheral surface of the pump housing are provided with grooves for accommodating the liquid pushing piece or the liquid blocking piece respectively, elastic parts are arranged in the grooves for pushing the liquid pushing piece and the liquid blocking piece outwards and elastically, the width of the end parts of the grooves is smaller than the radius of the liquid pushing piece and/or the liquid blocking piece, and the radial length of the liquid pushing piece and/or the liquid blocking piece extending out of the intermediate groove is equal to the annular width of the intermediate groove.

Preferably, the number of the liquid pushing pieces is at least one, the liquid pushing pieces are circumferentially and uniformly distributed, and the number of the liquid blocking pieces is at least one.

Preferably, the outer peripheral surface of the liquid pushing piece is in line contact or surface contact with the inner wall surface of the containing cavity, a rotating shaft is arranged at the center of the inner rotor, and one end or two ends of the rotating shaft extend out of the pump shell.

Preferably, the liquid pushing piece is a plurality of clamping plates uniformly arranged on the outer peripheral surface of the inner rotor, the liquid blocking piece is a part which is arranged in the groove of the pump shell and can swing within a certain range, the liquid blocking piece is provided with a reset torsion spring, and the liquid blocking piece extends out of the baffle plate in the middle groove and is pushed by the liquid pushing piece to swing.

Preferably, the liquid pushing piece is a plurality of clamping plates uniformly arranged on the outer peripheral surface of the inner rotor, the liquid blocking piece is an axial rotation component arranged in a groove of the pump shell, a plurality of extending baffles are uniformly arranged on the outer peripheral surface of the liquid blocking piece in the circumferential direction, and the baffles extend into the intermediate groove and are pushed by the liquid pushing piece to rotate.

The utility model discloses technical scheme prior art has following advantage relatively:

the utility model discloses technical scheme introduces the reverse osmosis water through motor drive dislysate pump, introduces the concentrate through the concentrate pump simultaneously and mixes and form the dislysate with the reverse osmosis water again, takes place the material isotonic exchange through corresponding pipeline input to dislysate chamber and the inside blood of blood room, and the dialysis waste liquid is finally drawn forth and outwards discharged from dialyzer inside by the dislysate pump. The utility model discloses technical scheme's dialysis waste liquid pump, dislysate pump, first concentrate pump and second concentrate pump all adopt the draw-in groove pump, and it is rotatory that the draw-in groove pump passes through inner rotor drive liquid pushing part, and the solution of inslot is rotatory thereupon between rethread liquid pushing part promotes, and rethread pump shell hinders liquid spare in order to realize the choked flow, and the pump body is extruded through the liquid outlet to final solution, makes solution flow have the directionality through foretell structural style, and does not need the check valve with control direction.

The utility model discloses the great volume solution of consequently portability of groove internal volume between technical scheme's draw-in groove pump even also can realize large-traffic control under the lower operating mode of rotational speed to the rotational speed of draw-in groove pump can be lower, and the draw-in groove pump also can realize the higher flow control of precision comparatively easily. Consequently the utility model discloses technical scheme's draw-in groove pump balance supplies liquid to join in marriage the demand that the liquid system satisfied conventional hemodialysis treatment completely. Particularly, the flow demand of overhigh or overlow flow demand can be met to a great extent, for example, the flow demand of continuous slow hemodialysis filtration equipment (CRRT), the device can be applied to ICU rescue of critical patients with multiple organ failure at low flow, and the device has an extremely wide application range.

Additionally, the utility model discloses technical scheme's balanced confession liquid system of supplying of draw-in groove pump, the solution that flows in it adopts uninterrupted alternation method to adjust the flow, and consequently the solution pressure balance that the system is inside flowing is invariable, compares with the alternative regulation flow mode that adopts among the prior art, and the pressure that can avoid inside solution middle section position is zero, and the pressure when the flow is the biggest reaches the maximum value undulant, makes the patient use the utility model discloses technical scheme's balanced confession liquid system of supplying of draw-in groove pump performance is more stable and has more the travelling comfort in the use.

Meanwhile, the utility model discloses technical scheme adopts and to link to each other dialysis waste liquid pump, dislysate pump, first concentrate pump and second concentrate pump are coaxial and by the unified drive of motor, can realize carrying out synchronous drive to a plurality of pump bodies through single motor, consequently operates comparatively simply, accurate and can realize the entering solution of the inside solution of cerini dialyser cerini and extrude the balance of solution.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a schematic diagram of a prior art hemodialysis treatment system;

fig. 2 is a schematic structural view of a balanced liquid supply and distribution system of a slot pump in embodiment 1 of the present invention;

fig. 3 is a schematic perspective view of a part of a balanced liquid supply and distribution system of a slot pump in embodiment 1 of the present invention;

fig. 4 is a schematic view of an internal structure of a slot pump according to embodiment 1 of the present invention;

fig. 5 is a schematic view of the internal structure of a slot pump according to another embodiment of the present invention;

fig. 6 is a schematic view of an internal structure of a slot pump according to embodiment 2 of the present invention;

fig. 7 is an internal structural schematic diagram of a slot pump according to embodiment 3 of the present invention.

The reference numbers illustrate:

the objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that, if directional indications (such as upper, lower, left, right, front and rear … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are changed accordingly.

In addition, if there is a description relating to "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

The utility model provides a balanced confession liquid of draw-in groove pump joins in marriage liquid system.

Example 1

Please refer to fig. 2 to 4, the embodiment of the present invention provides a liquid system is joined in marriage to balanced confession of draw-in groove pump, including cerini dialyser cerini 5, dialysis waste liquid pump 1, dialysis liquid pump 2, first concentrate pump 3 and second concentrate pump 4 constitution, wherein the cerini dialyser cerini 5 is inside to be divided into blood room 51 and dialysis liquid room 53 through hollow fiber membrane 52, and blood room 51 links to each other and forms circulation circuit with patient's blood vessel respectively through advancing blood circuit pipe 14 and bleeding pipeline 15. Dialysate chamber 53 one end is led to with the play liquid pipe of dislysate pump 2, the dialysate chamber 53 other end is led to with the feed liquor pipe of dislysate pump 1, the one end of first concentrate pump 3 is passed through first concentrate blender 13 and is linked to each other with the feed liquor pipe of dislysate pump 2, the other end of first concentrate pump 3 links to each other and absorbs first concentrate with the container of the first concentrate of splendid attire, and the one end of second concentrate pump 4 is passed through second concentrate blender 12 and is linked to each other with the feed liquor pipe of dislysate pump 2, the other end of second concentrate pump 4 then links to each other and absorbs the second concentrate with the container of splendid attire second concentrate, carry first concentrate and second concentrate simultaneously to the feed liquor pipe of dislysate pump 2 and mix with anti-permeate through first concentrate pump 3 and second concentrate pump 4 respectively.

The dialysate pump 1, the dialysate pump 2, the first concentrate pump 3, and the second concentrate pump 4 of this embodiment are all card slot pumps, where the card slot pump includes a pump housing 7 having an accommodating space therein and an inner rotor 8 disposed in the pump housing 7, a slot 9 is formed between an outer peripheral surface of the inner rotor 8 and an inner peripheral surface of the pump housing 7, the outer peripheral surface of the inner rotor 8 is axially provided with a plurality of liquid pushing members 10 rotating along with the inner rotor 8, the liquid pushing members 10 tightly attach to the outer peripheral surface of the inner rotor 8 and the inner peripheral surface of the pump housing 7, so as to divide the slot 9 into a plurality of independent spaces, the inner peripheral surface of the pump housing 7 is provided with a liquid blocking member 11 matching with the liquid pushing member 10 to suck the solution into the slot 9 or extrude the solution sucked into the slot 9, specifically, the liquid pushing member 10 of this embodiment is an axially self-rotating member, the liquid blocking member 11 is a cylinder capable of elastically and radially moving, the inner peripheral surface of the pump housing 7 is provided with a groove and . The liquid blocking member 11 has a liquid inlet 71 and a liquid outlet 72 formed at both sides thereof and penetrating the pump housing 7. When the liquid pushing piece 10 rotates along with the inner rotor 8, the liquid pushing piece 10 and the liquid blocking piece 11 can yield from each other, namely the liquid pushing piece 10 and the liquid blocking piece 11 are extruded from each other, so that the liquid blocking piece 11 overcomes the spring 111 to move towards the inside of the pump shell 7, the liquid pushing piece 10 can smoothly block the liquid blocking piece 11, and the liquid pushing piece 10 and the liquid blocking piece 8 reset again after the liquid pushing piece 10 and the liquid blocking piece 8 yield from each other. In other embodiments as shown in fig. 5, two liquid pushing members 10 arranged in the circumferential direction are elastic moving members at the same time, and in the process that the liquid blocking member 11 and the liquid pushing members 10 pass each other, the liquid blocking member 11 pushes the liquid pushing members 10 to elastically move towards the inside of the inner rotor 8, so that the two parts can avoid each other. The output volume per cavity of the inter-groove 9 in the slot pump of the present embodiment is determined by the width of the inter-groove 9 between the outer peripheral surface of the inner rotor 8 of the slot pump and the inner peripheral surface of the pump housing 7 and the thickness of the inter-groove 9, and therefore, the wider the width of the inter-groove 9 and the thicker the thickness of the inter-groove 9, the larger the output volume per cavity of the inter-groove 9 is. It should be noted that, in the present embodiment, a rotating shaft is axially disposed at the center of the inner rotor 8, one end of the rotating shaft may extend out of the pump housing 7 or both ends of the rotating shaft may extend out of the pump housing 7 at the same time, and a sealing ring may be disposed at a position where the rotating shaft and the pump housing 7 are matched with each other to improve sealing performance. In order to realize better solution pushing of the liquid pushing part 10 or better blocking of the liquid blocking part 11, the end width of the groove is set to be smaller than the radius of the liquid pushing part 10 and/or the liquid blocking part 11, and the radial length of the liquid pushing part 10 and/or the liquid blocking part 11 extending out of the middle groove is equal to the annular width of the middle groove 9. In order to further improve the pushing force of the liquid pushing member 10 on the solution and the sealing performance with the inner circumferential surface of the pump housing 7, the liquid pushing member 10 may be sealed with the inner circumferential surface of the pump housing 7 in a line contact manner or in a surface contact manner.

In other embodiments of the present invention, the liquid-blocking member 11 is a plurality of and at least one, and the liquid-pushing member 10 is at least one and circumferentially uniformly disposed, and each of the two sides of the liquid-blocking member 11 is respectively provided with a liquid inlet 71 and a liquid outlet 72, by respectively providing a plurality of liquid-blocking members 11 with a liquid inlet 71 and a liquid outlet 72, the liquid inlet 71 is respectively communicated with a liquid inlet container through a liquid inlet pipe, and the liquid outlet 72 is respectively detachably connected with a dialysate pipe through a liquid outlet pipe, after the solution enters the compartment 9 from the liquid inlet pipe, the solution is pushed by the liquid-pushing member 10 and gradually generates high pressure with respect to the liquid-blocking member 11, and then the solution flows through the liquid outlet pipes to flow into the dialysate pipe to mix, wherein all the liquid outlet pipes are simultaneously communicated with the dialysate pipe, the slot pump device is in a full-flow condition, and a part of the liquid outlet pipes are communicated with the dialysate pipe, and another part of the, and then the liquid inlet pipeline is communicated with the liquid outlet pipeline, part of the solution enters the intermediate groove and then flows back to the liquid inlet pipeline, and the clamping groove pump device is in a non-full-flow working condition.

In addition, when the draw-in groove pump of this embodiment drives solution, there is obvious difference with the drive mode of prior art gear pump, impeller rotor pump, pressure pipe peristaltic pump and diaphragm pump in its structure and principle. The main parts of the gear pump in the prior art comprise a driving gear and a driven gear, the driving gear drives the driven gear to rotate, and the impeller rotor pump drives the driven impeller rotor to rotate through a driving impeller rotor. The gear pump carries a small amount of solution through the space between the teeth of the driving gear and the driven gear, the inner wall of the pump shell is used as a limiting component, and the driving gear is meshed with the driven gear in size to form the solution in the space between the teeth to be extruded so as to convey the solution from one end of the gear to the other end of the gear. However, the gear pump can only carry a small amount of solution due to the small space between the teeth, and if a high flow rate is to be achieved, the gear pump must be rotated at a high speed, but it is difficult to control the rotation speed of the motor to achieve accurate flow rate control when the gear pump is rotated at a high speed. Meanwhile, the impeller rotor pump of the prior art also transports water through meshing of two rotating blades, so that the impeller rotor pump is basically similar to the gear pump of the prior art and is not described in detail here.

The draw-in groove pump of the embodiment is obviously different from the gear pump and the impeller rotor pump in the prior art in that the central distance between the driving rotating mechanism and the driven rotating mechanism of the gear pump and the impeller pump must be fixed, the driving gear and the driven gear or the driving blade and the driven blade are meshed with each other but cannot be blocked with each other, but the draw-in groove pump of the embodiment forms a clearance 9 between the outer peripheral surface of the inner rotor 8 and the inner peripheral surface of the pump shell 7, the outer peripheral surface of the inner rotor 8 is connected with a liquid pushing piece 10, the liquid pushing piece 10 can be one or more structures arranged in the circumferential direction, the clearance 9 is divided into a plurality of sections by the liquid pushing piece 10, the solution flows into the clearance 9 or flows out of the clearance 9 by the rotation of the inner rotor 8, meanwhile, a liquid blocking piece 11 is arranged between the liquid outlet 72 and the liquid inlet 71, the solution in the clearance 9 can be blocked by the mutual, particularly, the solution is extruded out through the liquid outlet 72 by continuously reducing the relative space between one of the liquid pushing members 10 and the liquid blocking member 11, so that the manufacturing cost of the clamping groove pump in the prior art can be reduced and the risk of blocking can be avoided compared with the gear pump and the movable impeller rotor pump in the prior art.

The pressure pipe peristaltic pump in the prior art is arranged between a pump shell and a rotor by wrapping solution through a pipeline, the rotor rolls a hose to drive the solution in the pipeline to move forwards so as to realize flow, but the pipeline of the pressure pipe peristaltic pump is easy to deform and flatten when being used repeatedly, so that the pipeline needs to be replaced in time, and accurate flow regulation cannot be realized after long-term use. In addition prior art's diaphragm pump is through the elastic diaphragm in the middle of the push-and-pull traction pump in order to realize the drive of solution business turn over pump body, but because the diaphragm pump needs the check valve in order to control the flow direction, if the seepage appears in the check valve will make the palirrhea phenomenon of trace appear when the push-and-pull diaphragm, the diaphragm pump also has fluid pressure fluctuation problem easily simultaneously, the pump body is when imbibition solution, it supplies the liquid pressure value to be zero, but the flow when solution is extruded the pump body external reaches the maximum value, also be exactly the pressure value reaches the maximum value, therefore dialysis process pressure fluctuation is big and cause user's health uncomfortable.

However, the draw-in groove pump of this embodiment drives through inner rotor 8 and pushes away liquid spare 10 rotatory, the solution that the rethread pushed away liquid spare 10 promotion was in groove 9 is rotatory thereupon, the liquid spare 11 that hinders of rethread pump housing 7 is in order to realize the choked flow, final solution is extruded the pump body through liquid outlet 72, make solution flow have the directionality through foretell structural style, and do not need the check valve with the control direction, the great volume of consequently great portability solution of the interior volume of groove 9 between the draw-in groove pump in addition, even also can realize large-traffic control under the lower operating mode of rotational speed, and because the rotational speed is lower, the draw-in groove pump also can realize the higher flow control of precision comparatively easily.

In this embodiment, the liquid pushing member 10 is an axial rotation member disposed on the outer peripheral surface of the inner rotor 8, and the liquid blocking member 11 is an axial rotation member disposed on the inner peripheral surface of the pump housing 7, wherein the outer peripheral surface of the liquid pushing member 10 is disposed on the inner peripheral surface of the pump housing 7, so that the solution in the intermediate tank 9 can be pushed to rotate along with the rotation, and in order to reduce the friction force when the liquid pushing member 10 and the liquid blocking member 11 contact each other, the liquid pushing member 10 is disposed as an axial rotation member in this embodiment, so that when the two contact each other, the two rotate relatively to each other, thereby effectively avoiding the direct collision between the two and reducing the friction force. When the inner rotor 8 rotates, the liquid pushing member 10 of the axial rotation structure can reduce the frictional force of the inner rotor 8 on the inner peripheral surface of the pump housing 7, and the liquid blocking member 11 can elastically move in the radial direction and can also reduce the frictional force on the outer peripheral surface of the inner rotor 8. The driving load of the motor 6 can be reduced through the structure, the working power of the motor 6 can be greatly converted into the driving acting force of the solution, and the structure enables the single motor 6 to realize synchronous driving of the plurality of pump bodies, so that the balance of the solution entering and extruding of the solution in the dialyzer is realized. Therefore, the present embodiment preferably employs a method in which the waste dialysate pump 1, the dialysate pump 2, the first concentrate pump 3, and the second concentrate pump 4 are coaxially connected and driven by the motor 6 in a unified manner.

The output volume per chamber of the dialysate waste pump 1, the dialysate pump 2, the first concentrate pump 3, and the second concentrate pump 4 of the present embodiment is calculated by converting a flow of a certain amount of dialysate per minute (for example, 500 ml/min) in a conventional hemodialysis treatment as an intermediate point, and adjusting the reverse osmosis water, the first concentrate, and the second concentrate to finally determine a ratio based on the ion concentration of the electrolytes, potassium, sodium, calcium, chloride, magnesium, and the like in the blood of a normal person, so that the output volume per chamber can reach the electrolyte ion concentration in the blood of a human body. After the output of each cavity of the dialysate is determined, the output of each cavity of the dialysate waste liquid pump 1, the dialysate pump 2, the first concentrate pump 3 and the second concentrate pump 4 is respectively determined according to the output of each cavity, and then the width of the intermediate groove 9 in the card groove pump and the thickness of the pump shell 7 are adjusted to realize the purpose. After the output of each cavity of each card slot pump is determined, the rotating speed of the card slot pump can be adjusted according to the requirement of clinical treatment so as to realize linear and quantitative adjustment of dialysate flow within the range of 50-1200 ml/min, thus completely meeting the requirement of conventional hemodialysis treatment. Particularly, the device can meet the requirement of overhigh or overlow flow, such as the flow requirement of continuous slow hemodialysis filtration equipment (CRRT), and can be applied to ICU (intensive care unit) to rescue critical patients with multiple organ failure at low flow.

In the clamping groove pump balanced liquid supply and distribution system, the flow of the solution flowing in the clamping groove pump balanced liquid supply and distribution system is adjusted by adopting an uninterrupted alternative method, so that the pressure of the solution flowing in the system is balanced and constant, and compared with an alternative flow adjusting mode adopted in the prior art, the pressure at the middle section position of the solution in the system can be prevented from being zero, and the pressure when the flow is maximum can reach the maximum fluctuation. When excessive pressure fluctuation occurs during the flowing of the dialysate and the dialysate enters the dialyzer 5 to exchange substances with blood, the abnormal blood pressure fluctuation of a patient can be directly caused, and the patient can generate obvious discomfort, such as pale face, difficulty in suffering, vomiting and other clinical abnormal reactions.

Referring to fig. 2 to 4, the operation principle of the system for balanced liquid supply and distribution of the slot pump of the present embodiment is as follows:

since the shafts of the inner rotors of the spent dialysate pump 1, the dialysate pump 2, the first concentrate pump 3, and the second concentrate pump 4 of the present embodiment are sequentially connected, the inner rotors 8 of the spent dialysate pump 1, the dialysate pump 2, the first concentrate pump 3, and the second concentrate pump 4 can be synchronously driven by the motor 6 to rotate. The dialysis waste liquid pump 1, the dialysis liquid pump 2, the first concentrate pump 3 and the second concentrate pump 4 of the present embodiment are all slot pumps. Wherein the working process of imbibition and flowing back of draw-in groove pump does, the inside liquid pushing component 10 one side of draw-in groove pump and the inlet that hinders between liquid piece 11 one side constantly increase and pressure reduction in order to inhale solution to groove 9 between through pump housing 7, then through the rotation of inner rotor 8 and drive the corresponding circumference of solution rotatory so that liquid pushing component 10 other end (or another liquid pushing component) and hinder between the liquid piece 11 another side space constantly dwindle, thereby will temporarily store in groove 9 between the solution extrude to outside through pump housing 7's liquid outlet 72. When the liquid pushing piece 10 moves through the liquid blocking piece 11, the liquid pushing piece 10 can be smoothly blocked through the liquid blocking piece 11 by the liquid blocking piece 11 moving towards the inner part of the pump shell 7 in the elastic radial direction, and the liquid blocking piece 11 can elastically extend out of the middle groove 9, so that the sealing performance between the liquid blocking piece 11 and the liquid pushing piece 10 is ensured.

Therefore, the dialysate pump 2 introduces reverse osmosis water into the internal inter-tank 9 through the liquid inlet pipe connected with the reverse osmosis water containing device, and similarly, the first concentrate pump 3 introduces the first concentrate into the internal inter-tank 9 space, and the second concentrate pump 4 introduces the second concentrate into the internal inter-tank 9 space, then the first concentrate pump 3 inputs the first concentrate into the liquid inlet pipe of the dialysate pump 2 through the first concentrate mixer 13, and the second concentrate pump 4 inputs the second concentrate into the liquid inlet pipe of the dialysate pump 2 through the second concentrate mixer 12, so that the reverse osmosis water, the first concentrate and the second concentrate are fully mixed in the dialysate pump 2 to form dialysate, and the mixed dialysate is pushed by the liquid pushing piece 10 to rotate circumferentially along the inter-tank 9, and in the rotation process of the liquid pushing piece 10, the space between the liquid pushing piece 10 and one side surface of the liquid blocking piece 11 becomes smaller continuously, therefore, the dialysate is output outwards through the liquid outlet 72 of the pump housing 7 and enters the dialysate chamber 53 through the pipeline to be subjected to isotonic exchange with the blood in the blood chamber 51, and the waste liquid after the isotonic exchange enters the internal compartment of the dialysate waste pump 1 through the pipeline connected with the dialysate waste pump 1, and is then driven by the liquid pushing piece 10 of the dialysate waste pump 1 to rotate and discharge the dialysate waste liquid outwards. However, the above-described operation of the present embodiment enables the balance between the feed and discharge in the dialysate chamber 53, and the reliable continuous feed without the alternate interruption of the replacement during the infusion.

Example 2

Referring to fig. 2 and 6, the present embodiment has the following technical features different from embodiment 1: the liquid pushing piece 10 is two clamping plates symmetrically arranged on the outer peripheral surface of the inner rotor 8, the liquid blocking piece 11 is arranged in a groove of the pump shell 7 and swings in a certain range, the liquid blocking piece 11 is provided with a reset torsion spring, and the liquid blocking piece 11 extends out of a baffle 112 towards the middle groove 8 and is matched with the liquid pushing piece 10.

When the clamping groove pump of the embodiment operates, after the liquid pushing pieces 10 rotate through the liquid blocking piece 11, as one of the liquid pushing pieces 10 continues to rotate, the space between the liquid pushing part 10 and the baffle plate 112 of the liquid blocking part 11 is increased continuously to generate a certain negative pressure, and the increasing space between the liquid pushing part 10 and the baffle plate 112 of the liquid blocking part 11 is connected with the liquid inlet 71 of the pump casing 7, so that the external solution enters and fills the space through the liquid inlet 71, when the other liquid pushing element 10 passes through the liquid blocking element 11 as the inner rotor 8 continues to rotate, the other liquid pushing element 10 and the baffle plate of the liquid blocking element 11 form another slot space and suck the solution, the originally filled solution compartment space does not have a volume increase, and a high pressure is generated by the continuous reduction of the space between the liquid pushing member 10 and the baffle plate 112 of the liquid blocking member 11, and the high pressure solution is discharged through the liquid outlet 72. The two liquid pushing parts 10 are continuously circulated through the liquid blocking part 11, so that the solution can enter the intermediate groove 8 from the liquid inlet 71 and is discharged from the liquid outlet 72.

Meanwhile, when the liquid pushing member 10 of the present embodiment passes through the liquid blocking member 11, the baffle 112 of the liquid blocking member 11 is pressed by the liquid pushing member 10 to swing, so that the baffle 112 can be dislocated and a dislocated space is created to allow the liquid pushing member 10 to smoothly pass through the liquid blocking member 11, and after the liquid pushing member 10 passes through the liquid blocking member 11, the liquid blocking member 11 is reset to swing under the action of the torsion spring, and the baffle 112 is ready to be pressed and swung with the next liquid pushing member 10.

Example 3

Referring to fig. 2 and 7, the present embodiment has the following technical features different from embodiment 1: the liquid pushing piece 10 is a plurality of clamping plates arranged on the outer peripheral surface of the inner rotor 8, the liquid blocking piece 11 is arranged on a rotating part in a groove of the pump shell 7, a plurality of extending baffles 112 are evenly arranged on the outer peripheral surface of the liquid blocking piece 11 in the circumferential direction, and the baffles 112 extend into the intermediate groove 8 to be matched with the liquid pushing piece 10.

When the slot pump of this embodiment is operated, and the liquid pushing member 10 passes through the liquid blocking member 11, the baffle 112 is pushed by the liquid pushing member 10 to rotate the liquid blocking member 11 around the central axis thereof, so that a displacement space is generated between the liquid pushing member 10 and the liquid blocking member 11, and the liquid pushing member 10 can pass through the liquid blocking member 11 smoothly. In addition, since the plurality of baffles 112 are averagely arranged on the outer peripheral surface of the liquid blocking member 11, after the baffles 112 are pushed by the liquid pushing member 10 to rotate by a certain angle, the next baffle 112 is ready to be touched and swung with the next liquid pushing member 10, and before the baffles are touched, the solution in the intermediate tank 8 can be discharged outwards through the liquid outlet 72. In the imbibing step, as the space between the liquid pushing piece 10 and the baffle plate 112 is increased, the solution can be absorbed into the space by negative pressure.

The above only is the preferred embodiment of the present invention, not so limiting the patent scope of the present invention, all under the concept of the present invention, the equivalent structure transformation made by the contents of the specification and the drawings is utilized, or the direct/indirect application is included in other related technical fields in the patent protection scope of the present invention.

Claims

1. The utility model provides a draw-in groove pump balance supplies liquid and joins in marriage liquid system, its characterized in that includes cerini dialyser cerini, dialysis waste liquid pump, dislysate pump and a plurality of concentrate pump, the division is blood room and dislysate room in the cerini dialyser cerini, the blood room passes through the blood way pipe and links to each other with patient's blood vessel, dislysate room one end with the play liquid pipe of dislysate pump leads to even, the dislysate room other end with the feed liquor pipe of dialysis waste liquid pump leads to even, a plurality of the drain pipe of concentrate pump with the feed liquor pipe of dislysate pump leads to even, dialysis waste liquid pump dialysate pump and the concentrate pump is rotatory by motor drive.

2. The system of claim 1, wherein the dialysate waste pump, the dialysate pump, and the concentrate pump are all slot pumps having internal structures capable of rotating relatively to each other to draw or extrude a solution, the slot pump includes a pump housing having a cavity therein and an inner rotor disposed in a central axial direction, an annular gap is formed between an outer circumferential surface of the inner rotor and an inner circumferential surface of the cavity, a plurality of liquid pushing members are uniformly disposed on an outer circumferential surface of the inner rotor in a circumferential direction to rotate along with the inner rotor, the liquid pushing members are attached to the inner circumferential surface of the cavity to divide the gap into a plurality of independent spaces, a plurality of liquid blocking members are disposed on an inner circumferential surface of the pump housing to cooperate with the liquid pushing members to generate a negative pressure suction solution or a high pressure extrusion solution, the pump housing has a liquid inlet and a liquid outlet, and the liquid inlet and the liquid outlet are communicated with the gap, and are arranged on both sides of the liquid blocking piece.

3. The slot pump balanced feed dispensing system of claim 2, wherein the liquid pushing member and/or the liquid blocking member is a resilient moving member.

4. The system of claim 3, wherein the inner rotor and/or the pump housing have a groove for receiving the liquid pushing member or the liquid blocking member, respectively, an elastic member is disposed in the groove for elastically pushing the liquid pushing member and the liquid blocking member outward, the width of the end of the groove is smaller than the radius of the liquid pushing member and/or the liquid blocking member, and the radial length of the liquid pushing member and/or the liquid blocking member extending out of the intermediate groove is equal to the annular width of the intermediate groove.

5. The system of claim 2, wherein the liquid pushing members are at least one and circumferentially spaced apart, and the liquid blocking members are at least one.

6. The system of claim 2, wherein the outer surface of the liquid pushing element is in line contact or surface contact with the inner wall of the cavity, a rotating shaft is disposed at the center of the inner rotor, and one or both ends of the rotating shaft extend out of the pump housing.

7. The system of claim 2, wherein the liquid pushing member is a plurality of clamping plates uniformly arranged on the outer periphery of the inner rotor, the liquid blocking member is a component arranged in the groove of the pump housing and oscillating within a certain range, the liquid blocking member is provided with a reset torsion spring, and the liquid blocking member extends out of the baffle plate into the intermediate groove and is pushed by the liquid pushing member to oscillate.

8. The system of claim 2, wherein the liquid pushing member is a plurality of clamping plates uniformly arranged on the outer peripheral surface of the inner rotor, the liquid blocking member is an axially rotating member arranged in the groove of the pump housing, a plurality of extending baffles are uniformly arranged on the outer peripheral surface of the liquid blocking member in the circumferential direction, and the baffles extend into the intermediate groove and are pushed by the liquid pushing member to rotate.