High-efficiency dialysate circulation filter device for medical dialysis equipment

Abstract

This invention discloses a high-efficiency dialysate circulation filtration device for medical dialysis equipment, relating to the field of dialysis filtration technology. It includes a cylindrical body and an external connection. A hollow fiber membrane is installed inside the cylindrical body, dividing the inner part of the body into a cylindrical space and an annular space. Annular connecting blocks are fixedly installed at both ends of the hollow fiber membrane. An internal groove is formed in the annular connecting block away from the blood input end. An adjustment part is provided on the annular connecting block with the internal groove. A connecting part is provided in the external connection. A limiting groove is formed on the inner wall of the cylindrical body, and an arc groove is formed within the limiting groove. A sealing part for closing the cylindrical body is provided on the external connection. A cleaning mechanism for cleaning the hollow fiber membrane is provided on the cylindrical body. By incorporating the adjustment part, this device can adaptively adjust the pressure within the cylindrical space, thereby reducing the circulation resistance within the cylindrical space, ensuring stable blood flow during dialysis, and avoiding the risk of complications for dialysis patients.

Description

Technical Field

[0001] This invention relates to the field of dialysis filtration technology, and more particularly to a high-efficiency dialysate circulation filtration device for medical dialysis equipment. Background Technology

[0002] In the clinical treatment of diseases such as kidney failure, medical dialysis equipment is the core medical equipment for maintaining patients' lives. It achieves the removal of metabolic waste and the regulation of water and electrolyte balance through the exchange of substances between dialysate and the patient's blood. As a key component of dialysis equipment, the dialysate circulation filtration device not only undertakes the function of purifying and filtering dialysate, but its circulation stability directly affects the blood flow state, which in turn relates to the safety of treatment. If the resistance fluctuation is too large during circulation, it will lead to sudden changes in blood flow velocity, abnormal blood pressure, and serious complications such as imbalance syndrome, coagulation, and hypotension, threatening the patient's life. Therefore, ensuring the stability of dialysate circulation and reducing resistance fluctuation are the core design requirements of the dialysate circulation filtration device.

[0003] Currently, commercially available medical dialysis equipment with dialysate circulation and filtration devices has significant technical defects. Existing devices lack an adaptive feedback adjustment mechanism. During dialysis, factors such as filter blockage, changes in dialysate viscosity, and fluctuations in blood flow velocity can all cause dynamic changes in the columnar space pressure of the circulatory system. Existing devices cannot respond to these changes in real time, resulting in large fluctuations in circulatory resistance. These drastic fluctuations in resistance are directly transmitted to the blood flow system, causing blood flow velocity to fluctuate. This not only affects dialysis efficiency but also disrupts the hemodynamic balance in the patient's body. Slow blood flow can easily lead to blood clotting, requiring additional anticoagulant drugs and increasing the risk of bleeding. Slow blood flow can cause a sudden drop in blood pressure, leading to symptoms such as dizziness and shock. Therefore, improvements are urgently needed. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a high-efficiency dialysate circulation filtration device for medical dialysis equipment, which aims to solve the above-mentioned technical problems.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a high-efficiency dialysate circulation filtration device for medical dialysis equipment, comprising a cylindrical body and external ends fixedly disposed at both ends of the cylindrical body, the axis of the external ends coinciding with the axis of the cylindrical body; a hollow fiber membrane for filtering blood is disposed inside the cylindrical body, and the axis of the hollow fiber membrane is collinear with the axis of the cylindrical body; the hollow fiber membrane is cylindrical in shape, and divides the inner part of the cylindrical body into a columnar space for blood circulation and an annular space for dialysate circulation; annular connecting blocks are fixedly disposed at both ends of the hollow fiber membrane, and the two annular connecting blocks are connected... The surfaces that are far apart are provided with annular slots. The annular connecting block away from the blood inlet end has two symmetrically distributed internal grooves. The annular connecting block with the internal grooves is provided with an adjustment part for automatically adjusting the flow rate. The cylinder is provided with two first interfaces communicating with the annular space. Multiple evenly distributed positioning rods are fixedly installed in the outer end. The outer end is provided with a connecting part for fixing the hollow fiber membrane. The inner wall of the cylinder is provided with a limiting groove. The limiting groove is provided with an arc groove. The outer end is provided with a sealing part for closing the cylinder. The cylinder is provided with a cleaning mechanism for cleaning the hollow fiber membrane.

[0006] Preferably, the adjusting part includes: The torsion spring has two parts, and the two torsion springs are respectively located in the built-in groove, and the torsion springs are fixedly connected to the surface of the built-in groove; The built-in plate is rotatably set in the built-in groove, and the surface of the built-in plate near the torsion spring is fixedly connected to the torsion spring. There are two connecting rods, and the two connecting rods are respectively fixedly installed on the surface of the built-in plate away from the torsion spring, and the connecting rods are rotatably connected to the adjacent annular connecting blocks; The valve plate is located between two connecting rods and is fixedly connected to the adjacent connecting rod. In the initial state, the valve plate has an angle greater than 5 degrees with the axis of the cylinder.

[0007] Preferably, the thickness of the valve plate gradually decreases from the axial direction of the connecting rod towards both sides.

[0008] Preferably, the connecting part includes: The positioning plate is located inside the outer end, and multiple positioning grooves are opened on the surface of the positioning plate near the cylinder. The positioning grooves are used to cooperate with the positioning rod to install and fix the positioning plate on the outer end. The outer diameter of the positioning plate is equal to the inner diameter of the outer end. A through-hole communicating with the columnar space is opened in the middle of the positioning plate. The positioning plate is used to prevent the dialysate in the annular space from entering the outer end. An annular insert plate is fixedly installed on the surface of the positioning plate near the cylinder. The annular insert plate is used to insert into the annular slot to install and fix the positioning plate.

[0009] Preferably, the diameter of the opening at the end closer to the cylinder is smaller than the diameter at the end farther from the cylinder.

[0010] Preferably, the closure includes: A cover is provided on the external end and is detachably and fixedly connected to the external end. A second interface for connecting the cylindrical space is provided in the middle of the cover. An annular protrusion is fixedly provided inside the cover. The sealing ring, located between the annular protrusion and the inner wall of the cap, is used to prevent blood from seeping out from the gap between the cap and the outer end. The interface cap is fitted onto the second interface.

[0011] Preferably, the cleaning facility includes: An arc-shaped outer frame is set on the cylinder and fixedly connected to the cylinder; The curved slider is slidably set inside the curved outer frame, and the material of the curved slider is a strong magnet; The power unit is located on the arc-shaped outer frame and is used to drive the arc-shaped slider to slide within the arc-shaped outer frame. The cleaning section, located inside the cylinder, is used to clean the hollow fiber membrane. The air supply section is located on the curved outer frame.

[0012] Preferably, the power unit includes: The drive motor is mounted on the arc-shaped outer frame and is detachably and fixedly connected to the arc-shaped outer frame; The drive screw is rotatably mounted on the arc-shaped outer frame, with the end of the drive screw closer to the drive motor being fixedly connected to the output end of the drive motor, and the end of the drive screw further away from the drive motor being rotatably connected to the arc-shaped outer frame. The drive screw is threadedly connected to the arc-shaped slider.

[0013] Preferably, the cleaning unit includes: An arc-shaped gas collecting frame is slidably disposed within an annular space, and the axis of the arc-shaped gas collecting frame is collinear with the axis of the cylinder. The jet nozzle has multiple nozzles, which are evenly arranged on the arc-shaped gas collection frame. The jet nozzles are used to spray air into the hollow fiber membrane. The limiting block has multiple blocks, which are fixedly set on the arc-shaped air collection frame. The limiting blocks are equipped with rolling balls, and the limiting blocks are made of strong magnets.

[0014] Preferably, the air supply section includes: The protective frame is fixedly mounted on the curved outer frame; The air supply hose has one end fixed on the arc-shaped air collection frame, and the other end passes through the protective frame and extends out of the protective frame to connect to the external air supply equipment. The air supply hose is slidably connected to the protective frame and the cylinder respectively. The air supply hose is used to supply air into the arc-shaped air collection frame.

[0015] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: 1. This device is equipped with an adjustment unit, which enables it to adaptively adjust the pressure within the columnar space, thereby reducing the circulatory resistance within the columnar space, ensuring stable blood flow during dialysis, and avoiding the risk of complications for dialysis patients.

[0016] 2. This device is equipped with a cleaning mechanism, which enables it to clean the hollow fiber membrane, thereby preventing large-area blockage of the hollow fiber membrane. This ensures that the pressure difference between the columnar space and the annular space is always maintained within a safe range, thus guaranteeing stable blood flow during dialysis and ensuring the effectiveness of hemodialysis for patients. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 A perspective view of a high-efficiency dialysate circulation filtration device for a medical dialysis machine is shown.

[0019] Figure 2 A front view of a high-efficiency dialysate circulation filtration device for a medical dialysis machine is shown.

[0020] Figure 3 It shows Figure 2 Sectional view of AA.

[0021] Figure 4 A side view of a high-efficiency dialysate circulation filtration device for a medical dialysis machine is shown.

[0022] Figure 5 It shows Figure 4 A cross-sectional view of BB.

[0023] Figure 6 It shows Figure 5 A magnified view of the local structure at point A in the middle.

[0024] Figure 7 A perspective view of a highly efficient dialysate circulation filtration device for medical dialysis equipment is shown.

[0025] Figure 8 An exploded view of a high-efficiency dialysate circulation filtration device for medical dialysis equipment is shown.

[0026] Figure 9 A partial structural schematic diagram of a high-efficiency dialysate circulation filtration device in a medical dialysis apparatus is shown.

[0027] Figure 10 It shows Figure 9 A magnified view of the local structure at point B.

[0028] Figure 11 An internal cross-sectional view of a high-efficiency dialysate circulation filtration device for a medical dialysis machine is shown.

[0029] Figure 12 It shows Figure 11 A magnified schematic diagram of the local structure at point C.

[0030] Legend: 1. Cylinder body; 2. External end; 3. Hollow fiber membrane; 4. Columnar space; 5. Annular space; 6. Annular connecting block; 7. Annular slot; 8. Internal groove; 9. First interface; 10. Positioning rod; 11. Limiting groove; 12. Arc groove; 13. Torsion spring; 14. Internal plate; 15. Connecting rod; 16. Valve plate; 17. Positioning plate; 18. Positioning groove; 19. Through port; 20. Annular insert plate; 21. Cover; 22. Second interface; 23. Annular protrusion; 24. Sealing ring; 25. Interface cap; 26. Arc-shaped outer frame; 27. Arc-shaped slider; 28. Drive motor; 29. ​​Drive screw; 30. Arc-shaped air collection frame; 31. Air nozzle; 32. Limiting block; 33. Ball bearing; 34. Protective frame; 35. Air delivery hose. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] In the description of this invention, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0033] It should be noted that when a component is described as "fixed to" another component, it can be directly on the other component or may have a component in between. When a component is considered "connected to" another component, it can be directly connected to the other component or may have a component in between. When a component is considered "set on" another component, it can be directly set on the other component or may have a component in between. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0034] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0035] Reference Figures 1 to 12 The present invention provides a further description of an embodiment of a high-efficiency dialysate circulation filtration device for a medical dialysis apparatus.

[0036] A high-efficiency dialysate circulation filtration device for medical dialysis equipment includes a cylindrical body 1 and external terminals 2 fixedly disposed at both ends of the cylindrical body 1. The axis of the external terminals 2 coincides with the axis of the cylindrical body 1. A hollow fiber membrane 3 for filtering blood is disposed inside the cylindrical body 1, and the axis of the hollow fiber membrane 3 is collinear with the axis of the cylindrical body 1. The hollow fiber membrane 3 is cylindrical in shape and divides the interior of the cylindrical body 1 into a columnar space 4 for blood flow and an annular space 5 for dialysate flow. Annular connecting blocks 6 are fixedly disposed at both ends of the hollow fiber membrane 3. Annular slots 7 are formed on the surfaces of the two annular connecting blocks 6 that are far apart from each other. Two symmetrically distributed internal grooves 8 are formed in the annular connecting block 6 away from the blood input end. An adjustment part for automatically adjusting the flow rate is disposed on the annular connecting block 6 with the internal grooves 8. The adjustment part includes: There are two torsion springs 13, and the two torsion springs 13 are respectively located in the built-in groove 8, and the torsion springs 13 are fixedly connected to the surface of the built-in groove 8; The built-in plate 14 is rotatably disposed in the built-in groove 8, and the surface of the built-in plate 14 near the torsion spring 13 is fixedly connected to the torsion spring 13. There are two connecting rods 15, and the two connecting rods 15 are respectively fixedly disposed on the surface of the built-in plate 14 away from the torsion spring 13, and the connecting rods 15 are rotatably connected to the adjacent annular connecting block 6. Valve plate 16 is located between two connecting rods 15 and is fixedly connected to the adjacent connecting rod 15. In the initial state, the angle between valve plate 16 and the axis of cylinder 1 is greater than 5 degrees. This setting reserves the basic flow area to avoid complete blockage of blood flow and also reserves the margin for pressure regulation. It works in conjunction with the initial permeability of hollow fiber membrane 3 to ensure a smooth transition of blood flow when dialysis is started. The thickness of valve plate 16 gradually decreases from the axial direction of connecting rod 15 to both sides. This setting forms a streamlined structure, reduces turbulence during blood flow, avoids red blood cell rupture, and works in conjunction with the filtration characteristics of hollow fiber membrane 3 to protect the integrity of blood components.

[0037] When the hollow fiber membrane 3 is partially blocked, the pressure inside the columnar space 4 increases, thus increasing the impact force of the blood in the columnar space 4 on the valve plate 16. The valve plate 16 is subjected to this force, causing it to rotate around the connecting rod 15 by a certain angle. This, in turn, causes the connecting rod 15, which is fixedly connected to the valve plate 16, to also rotate by a certain angle. This, in turn, causes the inner plate 14, which is fixedly connected to the connecting rod 15, to also rotate by a certain angle. Consequently, the torsion spring 13, which is fixedly connected to the inner plate 14, torsionally stores elastic potential energy. The valve plate 16 then rotates a certain distance... The angle increases the flow area of ​​blood from the columnar space 4 into the external end 2 near the valve plate 16; when the pressure in the columnar space 4 decreases, the force acting on the valve plate 16 decreases, the torsion spring 13 releases elastic potential energy, thereby causing the inner plate 14 fixedly connected to the torsion spring 13 to reverse a certain angle, which in turn causes the connecting rod 15 fixedly connected to the inner plate 14 to drive the valve plate 16 to reverse a certain angle, thereby reducing the flow area of ​​blood from the columnar space 4 into the external end 2 near the valve plate 16. This device is equipped with an adjustment unit, which enables it to adaptively adjust the pressure within the columnar space 4, thereby reducing the circulatory resistance within the columnar space 4, ensuring stable blood flow during dialysis, and avoiding the risk of complications for dialysis patients.

[0038] The cylinder 1 is provided with two first interfaces 9 communicating with the annular space 5. Multiple evenly distributed positioning rods 10 are fixedly installed inside the outer end 2. A connecting part for fixing the hollow fiber membrane 3 is also provided inside the outer end 2. The connecting part includes: A positioning plate 17, located inside the outer end 2, prevents dialysate from entering the outer end 2 from the annular space 5. Multiple positioning grooves 18 are formed on the surface of the positioning plate 17 near the cylinder 1. These grooves 18 cooperate with the positioning rod 10 to fix the positioning plate 17 onto the outer end 2. The outer diameter of the positioning plate 17 is equal to the inner diameter of the outer end 2. The cooperation between the positioning grooves 18 and the positioning rod 10 ensures minimal coaxiality error between the hollow fiber membrane 3 and the cylinder 1, preventing damage caused by uneven stress on the edges of the hollow fiber membrane 3. This, combined with the even distribution of blood flow in the adjustment section, improves the filtration efficiency of the hollow fiber membrane 3. The outer diameter of the positioning plate 17 is equal to the inner diameter of the outer end 2, forming radial positioning to avoid contaminant adhesion on the surface of the hollow fiber membrane 3 caused by vibration of the hollow fiber membrane 3 during dialysis, thus improving the cleaning effect. The positioning plate 17 has an opening 19 in the middle that communicates with the columnar space 4. The diameter of the opening 19 near the end of the cylinder 1 is smaller than the diameter of the end of the opening 19 away from the cylinder 1. This setting forms a contraction and expansion guiding structure, stabilizes the blood flow velocity, reduces the impact of blood on the end face of the hollow fiber membrane 3, and works in conjunction with the pressure regulation of the adjustment part to reduce the fatigue wear of the hollow fiber membrane 3 and extend the service life of the hollow fiber membrane 3. An annular insert plate 20 is fixedly installed on the surface of the positioning plate 17 near the cylinder 1. The annular insert plate 20 is used to insert into the annular slot 7 to install and fix the positioning plate 17. The interference fit between the annular insert plate 20 and the annular slot 7 forms a mechanical seal. Together with the sealing ring 24 of the sealing part, a double seal is achieved, reducing the risk of cross-contamination between the dialysate and blood and ensuring the safety of dialysis.

[0039] When disassembling and assembling the hollow fiber membrane 3, simply remove the positioning plate 17 from the external end 2 and then pour out the hollow fiber membrane 3. During installation, simply install one positioning plate 17 into the external end 2, then align the annular slot 7 on the annular connecting block 6 with the annular insert 20 on the positioning plate 17 and insert it. Then insert the annular insert 20 on the other positioning plate 17 into the adjacent annular slot 7, thus completing the installation of the hollow fiber membrane 3. This device, by providing a connecting part, allows workers to quickly disassemble and assemble the hollow fiber membrane 3.

[0040] A limiting groove 11 is formed on the inner wall of the cylinder 1, and an arc groove 12 is formed in the limiting groove 11. A sealing part for closing the cylinder 1 is provided on the outer end 2. The sealing part includes: The cover 21 is set on the external end 2 and is detachably fixed to the external end 2. The detachable connection between the cover 21 and the external end 2 facilitates the replacement of the hollow fiber membrane 3 or the cleaning of the interior. It works in conjunction with the maintenance convenience of the cleaning mechanism to reduce equipment maintenance costs. The cover 21 has a second interface 22 in the middle for connecting the columnar space 4. The cover 21 has an annular protrusion 23 fixedly set inside the cover 21. The sealing ring 24 is located between the annular protrusion 23 and the inner wall of the cap 21. The sealing ring 24 is used to prevent blood from seeping out from the gap between the cap 21 and the outer end 2. The sealing ring 24 is located between the annular protrusion 23 and the inner wall of the cap 21, forming an annular sealing band, thereby increasing the sealing contact area and greatly reducing the leakage. In conjunction with the mechanical seal of the connection, it completely blocks the blood from contacting the outside world to meet the medical sterility requirements. The interface cap 25 is fitted onto the second interface 22. The interface cap 25 tightly covers and prevents dust and bacteria from entering the columnar space 4. Together with the sealing effect of the connection part, it ensures the sterile state of the device when it is not in use and reduces the disinfection process before dialysis.

[0041] The cylinder 1 is equipped with a cleaning mechanism for cleaning the hollow fiber membrane 3.

[0042] Cleaning services include: An arc-shaped outer frame 26 is set on the cylinder 1 and fixedly connected to the cylinder 1; The arc-shaped slider 27 is slidably disposed within the arc-shaped outer frame 26, and the material of the arc-shaped slider 27 is a strong magnet; The power unit, mounted on the arc-shaped outer frame 26, includes: The drive motor 28 is mounted on the arc-shaped outer frame 26 and is detachably and fixedly connected to the arc-shaped outer frame 26; The drive screw 29 is rotatably mounted on the arc-shaped outer frame 26. The end of the drive screw 29 closest to the drive motor 28 is fixedly connected to the output end of the drive motor 28, and the end of the drive screw 29 furthest from the drive motor 28 is rotatably connected to the arc-shaped outer frame 26. The drive screw 29 is threadedly connected to the arc-shaped slider 27.

[0043] The cleaning section, located inside cylinder 1, includes: An arc-shaped gas collecting frame 30 is slidably disposed within the annular space 5, and the axis of the arc-shaped gas collecting frame 30 is collinear with the axis of the cylinder 1. The jet nozzle 31 has multiple nozzles, and the multiple jet nozzles 31 are evenly arranged on the arc-shaped gas collection frame 30. The jet nozzles 31 are evenly distributed, and the ejected gas diffuses in a fan shape, cleaning and covering without dead corners. After cleaning, the pressure difference quickly returns to a safe range. The jet nozzle 31 is used to spray gas into the hollow fiber membrane 3. Multiple limiting blocks 32 are fixedly mounted on the arc-shaped gas collection frame 30. Roller balls 33 are rolled on the limiting blocks 32. The roller balls 33 on the limiting blocks 32 convert sliding friction into rolling friction, so that the cleaning part moves smoothly and avoids damage to the surface of the hollow fiber membrane 3. The fixing effect of the hollow fiber membrane 3 in the connecting part is coordinated with that of the connecting part, and the service life of the hollow fiber membrane 3 is extended. The material of the limiting blocks 32 is a strong magnet.

[0044] An air supply unit is disposed on the arc-shaped outer frame 26, and the air supply unit includes: The protective frame 34 is fixedly mounted on the arc-shaped outer frame 26; The air supply hose 35 has one end fixed on the arc-shaped air collection frame 30, and the other end passes through the protective frame 34 and extends out of the protective frame 34 to connect to the external air supply equipment. The air supply hose 35 is slidably connected to the protective frame 34 and the cylinder 1 respectively. The air supply hose 35 is used to supply air into the arc-shaped air collection frame 30.

[0045] When the external equipment detects that the pressure difference between the columnar space 4 and the annular space 5 is too large, it indicates that the hollow fiber membrane 3 is blocked. The external air supply equipment supplies air into the arc-shaped air collection frame 30 through the air supply hose 35. Then, the air jet nozzle 31 sprays the gas in the arc-shaped air collection frame 30 onto the surface of the hollow fiber membrane 3. Then, the drive motor 28 is started, which causes the drive screw 29, which is fixedly connected to the output end of the drive motor 28, to rotate. Through the threaded transmission between the drive screw 29 and the arc-shaped slider 27, the arc-shaped slider 27 slides in the arc-shaped outer frame 26. Through the magnetic force, the limiting block 32 slides in the limiting groove 11, which causes the arc-shaped air collection frame 30, which is fixedly connected to the limiting block 32, to move. This causes the air jet nozzle 31, which is set on the arc-shaped air collection frame 30, to move in the axial direction of the cylinder 1. The gas sprayed by the air jet nozzle 31 sprays away the material blocking the hollow fiber membrane 3, thereby clearing the hollow fiber membrane 3. This device is equipped with a cleaning mechanism, which enables it to clean the hollow fiber membrane 3, thereby preventing large-area blockage of the hollow fiber membrane 3. This ensures that the pressure difference between the columnar space 4 and the annular space 5 is always maintained within a safe pressure difference range, thus guaranteeing the stability of blood flow during dialysis and ensuring the effectiveness of hemodialysis for patients.

[0046] Working principle: When in use, unscrew the interface cap 25 and then install the device on the dialysis equipment. During operation, blood enters the external end 2 through the second interface 22 at the end away from the adjustment section, and then enters the columnar space 4 through the port 19 on the positioning plate 17. At the same time, the external dialysate also enters the annular space 5 through any of the first interfaces 9 (preferably the first interface 9 away from the blood input side is used as the external dialysate input port). At this time, metabolic waste and excess electrolytes in the blood in the columnar space 4 move through the hollow fiber membrane 3 into the dialysate in the annular space 5. At the same time, calcium ions and bases in the dialysate in the annular space 5 move into the blood in the columnar space 4. The dialyzed blood enters the external end 2 near the adjustment section through the valve plate 16 and the port 19 in sequence, and is finally output through the second interface 22 near the adjustment section. The dialysate that has absorbed metabolic waste and excess electrolytes is output through another first interface 9, thus completing the dialysis of the blood.

[0047] The above description of the embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A high-efficiency dialysate circulation filtration device for medical dialysis equipment, comprising a cylindrical body (1) and external terminals (2) fixedly disposed at both ends of the cylindrical body (1), wherein the axis of the external terminals (2) coincides with the axis of the cylindrical body (1), characterized in that, A hollow fiber membrane (3) for filtering blood is installed inside the cylinder (1), and the axis of the hollow fiber membrane (3) is collinear with the axis of the cylinder (1). The hollow fiber membrane (3) is cylindrical in shape and divides the interior of the cylinder (1) into a columnar space (4) for blood flow and an annular space (5) for dialysate flow. Annular connecting blocks (6) are fixedly installed at both ends of the hollow fiber membrane (3). Annular slots (7) are provided on the surfaces of the two annular connecting blocks (6) that are far apart from each other. Two symmetrically distributed internal grooves (8) are provided in the annular connecting block (6) far from the blood input end. The annular connecting block (6) of the slot (8) is provided with an adjustment part for automatically adjusting the flow rate. The cylinder (1) is provided with two first interfaces (9) that communicate with the annular space (5). Multiple evenly distributed positioning rods (10) are fixedly provided in the outer end (2). The outer end (2) is provided with a connecting part for fixing the hollow fiber membrane (3). A limiting groove (11) is opened on the inner wall of the cylinder (1). An arc groove (12) is opened in the limiting groove (11). A sealing part for closing the cylinder (1) is provided on the outer end (2). A cleaning mechanism for cleaning the hollow fiber membrane (3) is provided on the cylinder (1).

2. The high-efficiency dialysate circulation filtration device for medical dialysis equipment according to claim 1, characterized in that, The regulating unit includes: Two torsion springs (13) are provided, and the two torsion springs (13) are respectively located in the built-in groove (8), and the torsion springs (13) are fixedly connected to the surface of the built-in groove (8); The built-in plate (14) is rotatably disposed in the built-in groove (8), and the surface of the built-in plate (14) near the torsion spring (13) is fixedly connected to the torsion spring (13); There are two connecting rods (15), and the two connecting rods (15) are respectively fixedly disposed on the surface of the inner plate (14) away from the torsion spring (13), and the connecting rods (15) are rotatably connected to the adjacent annular connecting block (6); The valve plate (16) is located between the two connecting rods (15) and is fixedly connected to the adjacent connecting rod (15). In the initial state, the valve plate (16) has an angle greater than 5 degrees with the axis of the cylinder (1).

3. The high-efficiency dialysate circulation filtration device for medical dialysis equipment according to claim 2, characterized in that, The thickness of the valve plate (16) gradually decreases from the axial direction of the connecting rod (15) to both sides.

4. The high efficiency dialysate circulation filter unit for medical dialysis equipment according to claim 3, wherein The connecting part includes: The positioning plate (17) is located inside the outer end (2), and the surface of the positioning plate (17) near the cylinder (1) is provided with multiple positioning grooves (18). The positioning grooves (18) are used to cooperate with the positioning rod (10) to install and fix the positioning plate (17) on the outer end (2). The outer diameter of the positioning plate (17) is equal to the inner diameter of the outer end (2). The middle part of the positioning plate (17) is provided with a through opening (19) communicating with the columnar space (4). The positioning plate (17) is used to prevent the dialysate in the annular space (5) from entering the outer end (2). An annular insert plate (20) is fixedly installed on the surface of the positioning plate (17) near the cylinder (1). The annular insert plate (20) is used to insert into the annular slot (7) to install and fix the positioning plate (17).

5. The high-efficiency dialysate circulation filtration device for medical dialysis equipment according to claim 4, characterized in that, The diameter of the opening (19) near the end of the cylinder (1) is smaller than the diameter of the opening (19) away from the end of the cylinder (1).

6. The high-efficiency dialysate circulation filtration device for medical dialysis equipment according to claim 5, characterized in that, The enclosed section includes: The cover (21) is set on the external end (2) and is detachably fixed to the external end (2). The middle part of the cover (21) is provided with a second interface (22) for connecting the columnar space (4). The cover (21) is fixedly provided with an annular protrusion (23). A sealing ring (24) is located between the annular protrusion (23) and the inner wall of the cap (21). The sealing ring (24) is used to prevent blood from seeping out from the gap between the cap (21) and the outer end (2). The interface cap (25) is fitted onto the second interface (22).

7. The high-efficiency dialysate circulation filtration device for medical dialysis equipment according to claim 6, characterized in that, Cleaning services include: An arc-shaped outer frame (26) is set on the cylinder (1) and fixedly connected to the cylinder (1); The arc-shaped slider (27) is slidably set inside the arc-shaped outer frame (26), and the material of the arc-shaped slider (27) is a strong magnet; The power unit is located on the arc-shaped outer frame (26) and is used to drive the arc-shaped slider (27) to slide within the arc-shaped outer frame (26); The cleaning section is located inside the cylinder (1) and is used to clean the hollow fiber membrane (3). The air supply unit is located on the arc-shaped outer frame (26).

8. The high efficiency dialysate circulation filter unit for medical dialysis apparatus as claimed in claim 7, wherein The power unit includes: The drive motor (28) is mounted on the arc-shaped outer frame (26) and is detachably and fixedly connected to the arc-shaped outer frame (26); The drive screw (29) is rotatably mounted on the arc-shaped outer frame (26), and the end of the drive screw (29) close to the drive motor (28) is fixedly connected to the output end of the drive motor (28), while the end of the drive screw (29) away from the drive motor (28) is rotatably connected to the arc-shaped outer frame (26). The drive screw (29) is threadedly connected to the arc-shaped slider (27).

9. The high efficiency dialysate circulation filter unit for medical dialysis equipment according to claim 8, wherein, The cleaning department includes: An arc-shaped gas collecting frame (30) is slidably disposed in an annular space (5), and the axis of the arc-shaped gas collecting frame (30) is collinear with the axis of the cylinder (1); The jet nozzle (31) has multiple nozzles, and the multiple jet nozzles (31) are evenly arranged on the arc-shaped gas collection frame (30). The jet nozzles (31) are used to spray air into the hollow fiber membrane (3). The limiting block (32) has multiple blocks, and the multiple limiting blocks (32) are fixedly set on the arc-shaped gas collection frame (30). The limiting block (32) is provided with rolling balls (33), and the material of the limiting block (32) is a strong magnet.

10. The high efficiency dialysate circulation filter unit for medical dialysis apparatus as claimed in claim 9, wherein, The gas delivery unit includes: The protective frame (34) is fixedly mounted on the arc-shaped outer frame (26); The air supply hose (35) is fixed at one end on the arc-shaped air collection frame (30), and the other end passes through the protective frame (34) and extends out of the protective frame (34) to connect to the external air supply equipment. The air supply hose (35) is slidably connected to the protective frame (34) and the cylinder (1) respectively. The air supply hose (35) is used to supply air into the arc-shaped air collection frame (30).

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