A hemodialysis coagulation filter device

Abstract

The present invention belongs to the technical field of dialyzers, and specifically is a hemodialysis coagulation filtering device, comprising a filter cartridge, one end of the filter cartridge is connected to an inlet pump, the other end of the filter cartridge is connected to an outlet pump, a notch is provided on the top surface of the filter cartridge, a replacement box is provided on the top surface of the filter cartridge, a plurality of replacement holes are provided on the bottom end of the replacement box, a plurality of filter frames are provided inside the replacement box, and a filter net is provided inside the filter frame; the hemodialysis coagulation filtering device described in the present invention, by providing a plurality of filter frames, filter nets are installed on the filter frames, and during dialysis, the filter nets in the filter cartridge are gradually replaced, which has a good filtering effect compared to cleaning a single filter net, and the filtering effect of the filter cartridge remains stable continuously; the staff only needs to clean the filter net after the dialysis is completed; therefore, it is beneficial to the dialysis process.

Description

Technical Field

[0001] The invention belongs to the technical field of dialyzers, in particular to a hemodialysis coagulation filtering device. Background Art

[0002] Hemodialysis is one of the renal replacement therapies for patients with acute and chronic renal failure. It drains blood from the body to the outside of the body and passes it through a dialyzer composed of tens of thousands of hollow fibers. The blood and an electrolyte solution containing electrolytes at concentrations similar to those in the body exchange substances inside and outside the hollow fibers through the principles of diffusion, ultrafiltration, adsorption and convection, thereby removing metabolic waste from the body and maintaining electrolyte and acid-base balance. At the same time, it removes excess water from the body and returns the purified blood. The entire process is called hemodialysis.

[0003] The existing Chinese patent with announcement number CN219271736U discloses a coagulation filter device for hemodialysis, including a filter body, a hollow fiber filter is arranged inside the filter body, a liquid inlet cap and a liquid outlet cap are respectively threadedly installed at both ends of the filter body, a pleated filter screen is arranged inside the liquid inlet cap, a cleaning brush is arranged on one side of the pleated filter screen, and the cleaning brush is connected to the adjustment seat.

[0004] The above patent starts the driving motor, which drives the screw to rotate. With the cooperation of the screw, the sliding rod and the adjusting seat, the position of the cleaning brush is adjusted to make the cleaning brush move left and right on the surface of the pleated filter, so as to clean the blood impurities on the surface of the pleated filter. The blood impurities are cleaned together so that most areas of the pleated filter can allow blood to circulate, avoiding clogging of the pleated filter after long-term use, affecting the filtering effect, and greatly improving the practicality of the device. However, in actual dialysis operations, it is difficult to completely achieve the smoothness of the filter by cleaning the impurities on the surface of the filter to avoid clogging of the filter, and during the dialysis process, cleaning the surface of the filter will lead to unstable blood circulation, abnormal blood flow rate and pressure, so it is not conducive to the dialysis process.

[0005] To this end, the present invention provides a hemodialysis coagulation filtration device. Summary of the invention

[0006] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0007] The technical solution adopted by the present invention to solve its technical problems is: a hemodialysis coagulation filtering device described in the present invention comprises a filter cartridge, one end of the filter cartridge is connected to an inlet pump, the other end of the filter cartridge is connected to an outlet pump, a notch is provided on the top surface of the filter cartridge, a replacement box is provided on the top surface of the filter cartridge, a plurality of replacement holes are provided on the bottom end of the replacement box, a plurality of filter frames are provided inside the replacement box, a filter net is provided inside the filter frame; the bottom end of the filter frame is plugged into the replacement hole and blocks the replacement hole, and when the filter frame is fully inserted into the filter cartridge, it cooperates with the filter net to separate the filter cartridge; a plurality of hydraulic cylinders are provided on the top end of the replacement box, and the output end of the hydraulic cylinder passes through the interior of the replacement box and is connected to the top end of the filter frame.

[0008] Preferably, an isolation net is provided on the side of the filter frame facing the liquid inlet pump, and the bottom of the isolation net is at the same height as the bottom of the filter net; impurities filtered and dropped by the filter net can be concentrated by the isolation net in conjunction with the filter frame.

[0009] Preferably, a plurality of driving motors are installed on the side of the replacement box, the output end of the driving motor passes through the interior of the replacement box, and an elliptical block is provided at the end of the output end of the driving motor; the elliptical block contacts the side of the filter when rotating.

[0010] Preferably, the non-filtering surface of the filter is provided with a receiving frame, the receiving frame is slidably connected to the inner wall of the filter frame, and a plurality of buffer springs are provided on the side of the receiving frame facing away from the filter, a positioning frame is provided at the end of the buffer spring away from the receiving frame, and the positioning frame is installed inside the filter frame; a pressure sensor is provided on the side of the positioning frame facing the receiving frame; the filter is installed on the side of the receiving frame; the pressure sensor is connected to the controller of the hydraulic cylinder through an electrical signal.

[0011] Preferably, the surface of the pressure sensor is covered with an isolation film.

[0012] Preferably, an isolation soft tube is arranged on the outer side of the buffer spring, one end of the isolation soft tube is blocked by a receiving frame, and the other end of the isolation soft tube is blocked by a positioning frame.

[0013] Preferably, a reflux pump is installed on the side of the filter cartridge, and the input end of the reflux pump is connected to a first conductive piece, and the first conductive piece is connected to the filter cartridge; the output end of the reflux pump is connected to a reflux pipe, and the end of the reflux pipe away from the reflux pump is connected to a second conductive piece, and the second conductive piece is connected to the replacement box.

[0014] Preferably, the first conducting member is specifically a one-way valve.

[0015] Preferably, a rectangular hole is opened on the side of the replacement box, and the lowest hole surface of the rectangular hole is in the same plane as the inner bottom wall of the replacement box; a push plate is inserted into the inside of the rectangular hole, and the bottom end of the filter frame passes through the push plate; a handle is provided on the side of the push plate facing the outside of the replacement box.

[0016] Preferably, a plurality of connectors are provided between the replacement box and the filter cartridge, and the connectors include an L-shaped electromagnet and a metal block; the L-shaped electromagnet is mounted on the surface of the filter cartridge, and the metal block is arranged at the bottom end of the replacement box.

[0017] The beneficial effects of the present invention are as follows:

[0018] 1. The hemodialysis coagulation filtration device described in the present invention has multiple filter frames with filter screens installed on the filter frames. During dialysis, the filter screens in the filter cartridge are gradually replaced, which has a good filtering effect compared to cleaning a single filter screen, and the filtering effect of the filter cartridge remains stable. The staff only needs to clean the filter screen after the dialysis is completed; therefore, it is beneficial to the dialysis process.

[0019] 2. The hemodialysis coagulation filtration device described in the present invention is provided with a reflux pump. When the filter frame is moved from the filter cartridge to the replacement box, the filter frame will carry part of the blood into the replacement box. Therefore, a reflux pump is provided. The reflux pump is started. The reflux pump draws the blood in the replacement box into the filter cartridge through the second conductive member, the reflux pipe and the first conductive member, thereby recovering the blood entering the replacement box and stabilizing the dialysis process. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described below in conjunction with the accompanying drawings.

[0021] Figure 1 is a stereogram of the present invention;

[0022] Figure 2 It is a schematic diagram of the internal structure of the replacement box of the present invention;

[0023] Figure 3 It is a schematic diagram of an L-shaped electromagnet of the present invention;

[0024] Figure 4 is a schematic diagram of a replacement box of the present invention;

[0025] Figure 5 is a schematic diagram of a filter cartridge of the present invention;

[0026] Figure 6 is a schematic diagram of a filter frame of the present invention;

[0027] Figure 7 It is a schematic diagram of a push plate of the present invention;

[0028] Figure 8It is a schematic diagram of an elliptical block of the present invention;

[0029] Fig. 9 It is a schematic diagram of the position of the receiving frame on the filter frame of the present invention;

[0030] Fig.10 It is a schematic diagram of the connection structure of the receiving frame of the present invention;

[0031] Fig.11 It is a schematic diagram of the position of the reflux pump of the present invention on the filter cartridge;

[0032] Fig.12 It is a schematic diagram of the connection structure of the reflux pump of the present invention.

[0033] In the figure: 1. filter cartridge; 11. liquid inlet pump; 12. liquid outlet pump; 13. notch; 2. replacement box; 20. rectangular hole; 201. push plate; 202. handle; 21. filter frame; 22. filter net; 221. isolation net; 23. replacement hole; 24. hydraulic cylinder; 3. drive motor; 31. elliptical block; 4. receiving frame; 41. isolation soft cylinder; 42. buffer spring; 43. positioning frame; 44. pressure sensor; 5. reflux pump; 51. reflux pipe; 52. second conductive member; 53. first conductive member; 6. L-shaped electromagnet; 61. metal block. DETAILED DESCRIPTION

[0034] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0035] like Figures 1 to 6 As shown, a hemodialysis coagulation filtering device according to an embodiment of the present invention comprises a filter cartridge 1, one end of the filter cartridge 1 is connected to a liquid inlet pump 11, the other end of the filter cartridge 1 is connected to a liquid outlet pump 12, a notch 13 is provided on the top surface of the filter cartridge 1, a replacement box 2 is provided on the top surface of the filter cartridge 1, a plurality of replacement holes 23 are provided on the bottom end of the replacement box 2, a plurality of filter frames 21 are provided inside the replacement box 2, a filter screen 22 is provided inside the filter frame 21; the bottom end of the filter frame 21 is plugged into the replacement hole 23 and blocks the replacement hole 23, and when the filter frame 21 is fully inserted into the filter cartridge 1, the filter cartridge 1 is separated by the filter screen 22; a plurality of hydraulic cylinders 24 are provided on the top of the replacement box 2, and the output end of the hydraulic cylinder 24 passes through the interior of the replacement box 2 and is connected to the top of the filter frame 21;

[0036] In order to solve the problems raised by the background technology, the embodiment of the present invention provides a replacement box 2. Initially, the filter frame 21 closest to the inlet pump 11 inside the replacement box 2 is inserted into the filter cartridge 1 to filter the blood in the filter cartridge 1. Specifically, when performing hemodialysis, the inlet pump 11 and the outlet pump 12 are started, and the inlet pump 11 injects the patient's blood into the filter cartridge 1, and then the blood is input into the patient's body through the outlet pump 12. In this process, the filter mesh 22 on the filter frame 21 filters the flowing blood, and impurities in the blood are filtered by the filter mesh 22. After the filter mesh 22 has been used for a period of time, the hydraulic cylinder 24 is started, and the hydraulic cylinder 24 sends the filter frame 21 located in the replacement box 2 into the filter cartridge 1. At the same time, the hydraulic cylinder 24 connected to the filter frame 21 located in the filter cartridge 1 drives the filter frame 21 inside the filter cartridge 1 through the notch 13 and the replacement hole 23 to the replacement box 2. The bottom end of the filter frame 21 located in the replacement box 2 blocks the replacement hole 23 to prevent the blood in the filter cartridge 1 from entering the replacement box 2 through the replacement hole 23; it should be pointed out that when the filter frame 21 filters the blood in the filter cartridge 1, the top of the filter frame 21 blocks the replacement hole 23 to prevent the blood in the filter cartridge 1 from entering the replacement box 2; based on the above, it can be seen that the filter mesh 22 in the filter cartridge 1 is gradually replaced, which has a good filtering effect compared to cleaning a single filter mesh 22, and the filtering effect of the filter cartridge 1 remains stable; the staff only needs to clean the filter mesh 22 after the dialysis is completed; based on the above, it can be seen that; during the dialysis process, the filter mesh 22 is directly replaced after being blocked, and there is no need to clean it inside the filter cartridge 1, so the dialysis process can maintain the stability of blood circulation, and the normal blood flow rate and pressure; therefore, it is beneficial to the dialysis process.

[0037] An isolation net 221 is provided on the side of the filter frame 21 facing the liquid inlet pump 11, and the bottom end of the isolation net 221 is at the same height as the bottom end of the filter net 22; the impurities filtered and fallen off by the filter net 22 can be concentrated by the isolation net 221 in cooperation with the filter frame 21; when the filter frame 21 is moved from the filter cartridge 1 to the inside of the replacement box 2, the isolation net 221 can concentrate the impurities that fall off from the side of the filter net 22 to prevent the impurities from falling into the filter cartridge 1 again.

[0038] like Figures 6 to 8 As shown, a plurality of driving motors 3 are installed on the side of the replacement box 2, and the output end of the driving motor 3 passes through the interior of the replacement box 2, and an elliptical block 31 is provided at the end of the output end of the driving motor 3; the elliptical block 31 contacts the side of the filter screen 22 when rotating; when the filter cartridge 1 is in use, the driving motor 3 is started, driving the elliptical block 31 to rotate back and forth, thereby impacting the filter screen 22, driving the impurities filtered by the filter screen 22 to fall downward, and then being concentrated by the isolation net 221, ensuring that the use of the filter screen 22 maintains a good filtering effect.

[0039] like Figures 9 and 10As shown, the non-filtering surface of the filter 22 is provided with a receiving frame 4, the receiving frame 4 is slidably connected to the inner wall of the filter frame 21, and a plurality of buffer springs 42 are provided on the side of the receiving frame 4 facing away from the filter 22, and a positioning frame 43 is provided at the end of the buffer spring 42 away from the receiving frame 4, and the positioning frame 43 is installed inside the filter frame 21; a pressure sensor 44 is provided on the side of the positioning frame 4 facing the receiving frame 4; the filter 22 is installed on the side of the receiving frame 4; the pressure sensor 44 is connected to the controller of the hydraulic cylinder 24 through an electrical signal; when the filter 22 is in use, as the filter 22 filters impurities, the permeability of the filter 22 decreases, so the filter 22 is affected by blood The flow pressure increases, and the filter 22 is installed on the surface of the receiving frame 4. The thrust exerted on the filter 22 acts on the buffer spring 42 through the receiving frame 4, and the buffer spring 42 is gradually compressed, so that the receiving frame 4 gradually approaches the pressure sensor 44 installed on the positioning frame 43. When the pressure sensor 44 is squeezed, it indicates that the filter 22 needs to be replaced, and the pressure sensor 44 is connected to the controller of the hydraulic cylinder 24 through an electrical signal. Therefore, when the pressure sensor 44 is squeezed, the aforementioned replacement process is automatically started, thereby improving the automation of the device. It should be pointed out that the positioning frame 43 is installed inside the filter frame 21 and will not interfere with the movement of the filter frame 21.

[0040] The surface of the pressure sensor 44 is covered with an isolation membrane, which isolates the blood from the pressure sensor 44 and protects the pressure sensor 44 .

[0041] An isolation tube 41 is arranged outside the buffer spring 42, one end of the isolation tube 41 is blocked by the receiving frame 4, and the other end is blocked by the positioning frame 43, so as to isolate the blood from the buffer spring 42 and facilitate subsequent cleaning.

[0042] like Figure 11 to Figure 12 As shown, a reflux pump 5 is installed on the side of the filter cartridge 1, and the input end of the reflux pump 5 is connected to a first conductive member 53, and the first conductive member 53 is connected to the filter cartridge 1; the output end of the reflux pump 5 is connected to a reflux pipe 51, and the end of the reflux pipe 51 away from the reflux pump 5 is connected to a second conductive member 52, and the second conductive member 52 is connected to the replacement box 2; when the filter frame 21 is moved from the filter cartridge 1 to the replacement box 2, the filter frame 21 will carry part of the blood into the replacement box 2, so the reflux pump 5 is set, and the reflux pump 5 is started. The reflux pump 5 draws the blood in the replacement box 2 into the filter cartridge 1 through the second conductive member 52, the reflux pipe 51 and the first conductive member 53, so as to realize the recovery of the blood entering the replacement box 2 and stabilize the dialysis process.

[0043] The first conducting member 53 is specifically a one-way valve, which prevents the blood in the filter cartridge 1 from escaping from the filter cartridge 1 through the first conducting member 53 .

[0044] like Figures 2 to 7As shown, a rectangular hole 20 is opened on the side of the replacement box 2, and the lowermost hole surface of the rectangular hole 20 is in the same plane with the inner bottom wall of the replacement box 2; a push plate 201 is inserted into the inside of the rectangular hole 20, and the bottom end of the filter frame 21 passes through the push plate 201; a handle 202 is provided on the side of the push plate 201 facing the outside of the replacement box 2; when extracting blood from the replacement box 2, the staff intermittently pulls the push plate 201 in the rectangular hole 20 through the handle 202, and the bottom surface of the push plate 201 is slidably connected to the replacement box 2, so that the blood in the replacement box 2 can be concentrated through the push plate 201, which is convenient for being extracted by the second conductive member 52.

[0045] like Figures 1 to 3 As shown, a plurality of connectors are provided between the replacement box 2 and the filter cartridge 1, and the connectors include an L-shaped electromagnet 6 and a metal block 61; the L-shaped electromagnet 6 is mounted on the surface of the filter cartridge 1, and the metal block 61 is disposed at the bottom end of the replacement box 2; when installing the replacement box 2, the L-shaped electromagnet 6 is energized, and the replacement box 2 is adsorbed onto the L-shaped electromagnet 6 through the metal block 61; when disassembling the replacement box 2, it is only necessary to stop energizing the L-shaped electromagnet 6, so that the adsorption of the metal block 61 can be contacted, thereby releasing the fixation of the replacement box 2 and facilitating disassembly.

[0046] When performing hemodialysis, the inlet pump 11 and the outlet pump 12 are started, and the inlet pump 11 injects the patient's blood into the filter cartridge 1, and then inputs it into the patient's body through the outlet pump 12. In this process, the filter mesh 22 on the filter frame 21 filters the flowing blood, and impurities in the blood are filtered by the filter mesh 22; when the filter mesh 22 has been used for a period of time, the hydraulic cylinder 24 is started, and the hydraulic cylinder 24 sends the filter frame 21 located in the replacement box 2 into the filter cartridge 1. At the same time, the hydraulic cylinder 24 connected to the filter frame 21 located in the filter cartridge 1 drives the filter frame 21 inside the filter cartridge 1 through the notch 13 and the replacement hole 23 to the inside of the replacement box 2, and the bottom end of the filter frame 21 located in the replacement box 2 blocks the replacement hole 23 to prevent the blood inside the filter cartridge 1 from entering the replacement box 2 through the replacement hole 23; it should be pointed out that when the filter frame 21 filters the blood in the filter cartridge 1, the filter frame 21 The top of the filter frame 21 blocks the replacement hole 23 to prevent the blood in the filter cartridge 1 from entering the replacement box 2; based on the above, it can be seen that the filter mesh 22 in the filter cartridge 1 is gradually replaced, which has a good filtering effect compared to cleaning a single filter mesh 22, and the filtering effect of the filter cartridge 1 continues to remain stable; the staff only needs to clean the filter mesh 22 after the dialysis is completed; therefore, it is beneficial to the dialysis process; when the filter frame 21 is moved from the filter cartridge 1 to the replacement box 2, the isolation net 221 can concentrate the impurities that fall off from the side of the filter mesh 22 to prevent the impurities from falling into the filter cartridge 1 again; when the filter cartridge 1 is in use, the drive motor 3 is started, driving the elliptical block 31 to rotate back and forth, thereby impacting the filter mesh 22, driving the impurities filtered by the filter mesh 22 to fall off downward, and then being concentrated by the isolation net 221, ensuring that the use of the filter mesh 22 maintains a good filtering effect.

[0047] When the filter 22 is in use, as the filter 22 filters impurities, the permeability of the filter 22 decreases, so the pressure of the blood flow on the filter 22 increases, and the filter 22 is installed on the surface of the receiving frame 4, and the thrust on the filter 22 acts on the buffer spring 42 through the receiving frame 4, and the buffer spring 42 is gradually compressed, so that the receiving frame 4 gradually approaches the pressure sensor 44 installed on the positioning frame 43. When the pressure sensor 44 is squeezed, it indicates that the filter 22 needs to be replaced, and the pressure sensor 44 is connected to the controller of the hydraulic cylinder 24 through an electrical signal. Therefore, when the pressure sensor 44 is squeezed, the above-mentioned replacement process is automatically started, thereby improving the automation of the device. It should be pointed out that the positioning frame 43 is installed inside the filter frame 21 and will not interfere with the movement of the filter frame 21. The surface of the pressure sensor 44 is covered with a layer of isolation membrane, which isolates the blood from the pressure sensor 44 and protects the pressure sensor 44. An isolation soft tube 41 is arranged on the outside of the buffer spring 42, one end of the isolation soft tube 41 is blocked by the receiving frame 4, and the other end is blocked by the receiving frame 4. The end is blocked by the positioning frame 43; the blood is isolated from the buffer spring 42, which is convenient for subsequent cleaning; when the filter frame 21 is moved from the filter cartridge 1 to the replacement box 2, the filter frame 21 will carry part of the blood into the replacement box 2, so a reflux pump 5 is provided, and the reflux pump 5 is started. The reflux pump 5 draws the blood in the replacement box 2 into the filter cartridge 1 through the second conductive member 52, the reflux pipe 51 and the first conductive member 53, so as to realize the recovery of the blood entering the replacement box 2 and stabilize the dialysis process; when the blood in the replacement box 2 is extracted, the working The personnel intermittently pull the push plate 201 in the rectangular hole 20 through the handle 202, and the bottom surface of the push plate 201 is slidably connected to the replacement box 2, so that the blood in the replacement box 2 can be concentrated through the push plate 201, which is convenient for being extracted by the second conductive member 52; when installing the replacement box 2, the L-shaped electromagnet 6 is energized, and the replacement box 2 is adsorbed onto the L-shaped electromagnet 6 through the metal block 61. When disassembling the replacement box 2, it is only necessary to stop energizing the L-shaped electromagnet 6, which can contact the adsorption of the metal block 61, thereby releasing the fixation of the replacement box 2 and facilitating disassembly.

[0048] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A hemodialysis coagulation filtration device, characterized in that: The invention comprises a filter cartridge (1), one end of the filter cartridge (1) is connected to a liquid inlet pump (11), the other end of the filter cartridge (1) is connected to a liquid outlet pump (12), a notch (13) is provided on the top surface of the filter cartridge (1), a replacement box (2) is provided on the top surface of the filter cartridge (1), a plurality of replacement holes (23) are provided on the bottom end of the replacement box (2), a plurality of filter frames (21) are provided inside the replacement box (2), a filter net (22) is provided inside the filter frame (21); the bottom end of the filter frame (21) is plugged into the replacement hole (23) to block the replacement hole (23), and when the filter frame (21) is fully inserted into the filter cartridge (1), it cooperates with the filter net (22) to block the filter cartridge (1); a plurality of hydraulic cylinders (24) are provided on the top of the replacement box (2), the output end of the hydraulic cylinder (24) is connected to the replacement hole (23) of the replacement box (2). The filter cartridge (2) is provided with a reflux pump (5) at its side, and is connected to the top of the filter frame (21); a reflux pump (5) is installed on the side of the filter cartridge (1); the input end of the reflux pump (5) is connected to a first conductive member (53), and the first conductive member (53) is connected to the filter cartridge (1); the output end of the reflux pump (5) is connected to a reflux pipe (51), and the end of the reflux pipe (51) away from the reflux pump (5) is connected to a second conductive member (52), and the second conductive member (52) is connected to the replacement box (2); a rectangular hole (20) is provided on the side of the replacement box (2), and the bottom hole surface of the rectangular hole (20) is in the same plane as the inner bottom wall of the replacement box (2); a push plate (201) is inserted into the inside of the rectangular hole (20), and the bottom end of the filter frame (21) passes through the push plate (201); a handle (202) is provided on the side of the push plate (201) facing the outside of the replacement box (2).

2. A hemodialysis coagulation filtration device according to claim 1, characterized in that: An isolation net (221) is provided on the side of the filter frame (21) facing the liquid inlet pump (11), and the bottom end of the isolation net (221) is at the same height as the bottom end of the filter net (22); impurities filtered and dropped by the filter net (22) can be collected by the isolation net (221) in conjunction with the filter frame (21).

3. A hemodialysis coagulation filtration device according to claim 2, characterized in that: A plurality of drive motors (3) are mounted on the side of the replacement box (2); the output ends of the drive motors (3) pass through the interior of the replacement box (2), and an elliptical block (31) is provided at the end of the output end of the drive motor (3); the elliptical block (31) contacts the side of the filter screen (22) when rotating.

4. A hemodialysis coagulation filtration device according to claim 1, characterized in that: The non-filtering surface of the filter screen (22) is provided with a receiving frame (4), the receiving frame (4) is slidably connected to the inner wall of the filter frame (21), and a plurality of buffer springs (42) are provided on a side of the receiving frame (4) facing away from the filter screen (22), and a positioning frame (43) is provided at an end of the buffer spring (42) away from the receiving frame (4), and the positioning frame (43) is installed inside the filter frame (21); a pressure sensor (44) is provided on a side of the positioning frame (43) facing the receiving frame (4); the filter screen (22) is installed on a side of the receiving frame (4); and the pressure sensor (44) is connected to a controller of the hydraulic cylinder (24) via an electrical signal.

5. A hemodialysis coagulation filtration device according to claim 4, characterized in that: The surface of the pressure sensor (44) is covered with an isolation film.

6. A hemodialysis coagulation filtration device according to claim 4, characterized in that: An isolation soft tube (41) is arranged outside the buffer spring (42); one end of the isolation soft tube (41) is blocked by a receiving frame (4), and the other end is blocked by a positioning frame (43).

7. A hemodialysis coagulation filtration device according to claim 1, characterized in that: The first conducting member (53) is specifically a one-way valve.

8. A hemodialysis coagulation filtration device according to claim 1, characterized in that: A plurality of connecting parts are arranged between the replacement box (2) and the filter cartridge (1), the connecting parts comprising an L-shaped electromagnet (6) and a metal block (61); the L-shaped electromagnet (6) is mounted on the surface of the filter cartridge (1), and the metal block (61) is arranged at the bottom end of the replacement box (2).

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