A coagulation filtration device for hemodialysis

Abstract

The application discloses a coagulation filtration device for hemodialysis, comprising a filter piece, wherein a filter piece is provided with a impurity removal piece; in the application, a conical filter structure with elastic floating function is constructed by the filter piece, so that the coagulation flocculation, fibrin aggregation and microthrombus generated in the extracorporeal circulation can be stably intercepted during the hemodialysis process, the risk of blood vessel embolism caused by the return of impurities into the patient's body is avoided, the filter cloth arranged in a conical shape can increase the contact area of blood and the filter surface, the impurity interception efficiency is improved, and the filter cloth clogging rate is slowed down, the elastic floating design of the spring provides core power support for gravity-triggered automatic impurity removal, and the continuous use requirement of long-time hemodialysis treatment is effectively adapted.

Description

Technical Field

[0001] This invention relates to the field of dialysis equipment technology, specifically a coagulation filtration device for hemodialysis. Background Technology

[0002] Hemodialysis is a core renal replacement therapy for patients with end-stage renal disease. It involves establishing an extracorporeal blood circulation pathway to deliver the patient's blood into the dialyzer. Through principles such as diffusion and convection, metabolic toxins and excess water are removed from the body, and acid-base and electrolyte imbalances are corrected, thereby maintaining the stability of the patient's internal environment. Coagulation filtration is an important safety protection link at the extracorporeal venous end of hemodialysis. It is used to intercept blood clots, fibrin aggregates, and microthrombi generated in the tubing and dialyzer, preventing these substances from being reinfused into the body and causing vascular embolism. It is a key component to ensure the safe and stable conduct of dialysis treatment.

[0003] Existing coagulation filtration devices mostly use conventional filtration structures, which have a relatively limited effective contact area between blood and the filter surface. Coagulation impurities tend to accumulate locally on the filter surface, easily causing problems such as filter layer blockage and increased filtration resistance. In long-term continuous dialysis scenarios, frequent shutdowns are required for tubing cleaning or component replacement, which to some extent affects the continuity of treatment. At the same time, most devices rely on manual cleaning of impurities and do not have automatic impurity removal capabilities, increasing the workload of medical staff and making it difficult to adapt to the needs of long-term uninterrupted dialysis treatment. Summary of the Invention

[0004] The purpose of this invention is to address the problems of existing coagulation filtration devices, which mostly employ conventional filtration structures, resulting in a relatively limited effective contact area between blood and the filter surface. This leads to the easy accumulation of coagulation impurities on the filter surface, causing problems such as filter layer blockage and increased filtration resistance. In long-term continuous dialysis scenarios, frequent shutdowns are required for tubing cleaning or component replacement, which affects the continuity of treatment to some extent. At the same time, most devices rely on manual impurity cleaning and lack automatic impurity removal capabilities, increasing the workload of medical staff and making it difficult to adapt to the needs of long-term uninterrupted dialysis treatment. Therefore, this invention provides a coagulation filtration device for hemodialysis.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a coagulation filtration device for hemodialysis, comprising: a filter element, wherein the filter element is provided with a debris removal component;

[0006] The filter element includes a processing tube, a fixing ring fixedly connected inside the processing tube, a baffle tube extending through the inner side of the fixing ring and slidably inserted into the fixing ring, a connecting ring one fixedly connected to the top of the baffle tube, and an insertion hole extending through the top of the connecting ring one, a connecting ring two disposed inside the processing tube, a support rod fixedly connected to the top of the connecting ring two, a top block fixedly connected to the top of the support rod, a filter cloth sleeved on the outer side of the connecting ring two, the support rod and the top block, the filter cloth being circular and extending outwards and folded back to below the connecting ring two, an insertion post fixedly connected to the bottom end of the connecting ring two, the insertion post extending through the filter cloth and inserted into the insertion hole, a spring fixedly connected to the top of the fixing ring, and the top end of the spring fixedly connected to the bottom end of the connecting ring one.

[0007] As a further embodiment of the present invention: the support rods are provided in four groups, evenly distributed at the top of the two connecting rings, and the four groups are distributed in a conical shape, with the top smaller and the bottom larger. The support rods are flush with the two side ends of the connecting rings, and the top block is hemispherical.

[0008] As a further embodiment of the present invention: six sets of insertion holes are provided, evenly distributed at the top of the connecting ring; six sets of insertion posts are provided, each set of insertion posts being inserted into a set of insertion holes; and six sets of springs are provided, evenly distributed at the bottom of the connecting ring.

[0009] As a further embodiment of the present invention: the impurity removal component includes an impurity removal groove that is opened through the side end of the processing pipe, and a guide plate is fixedly connected to the bottom of the impurity removal groove. The guide plate is annular and extends to the outside of the processing pipe. The cross-section of the guide plate is V-shaped.

[0010] As a further embodiment of the present invention: a connecting column is fixedly connected to the top of the inside of the waste discharge trough, the bottom end of the connecting column is fixedly connected to the top of the guide plate, and a limiting groove is opened on the inside of the processing tube. In the initial state, the spring is in the extended state, pushing the connecting ring into the limiting groove.

[0011] As a further embodiment of the present invention: the outer circular surface of the connecting ring is embedded in the magnetic block, and the inner side of the limiting groove is embedded with the magnetic block. The corresponding surfaces of the magnetic block and the magnetic block are opposite poles. When the connecting ring is in the limiting groove, the connecting ring and the limiting groove are magnetically attracted and connected. As the impurities accumulated on the filter cloth increase, the gravity on the connecting ring increases until the magnetic connection between the connecting ring and the limiting groove is released. The spring is compressed to its limit position, and the area where the filter cloth is located moves down to the impurity discharge groove. The impurities accumulated on the filter cloth flow to the guide plate through the impurity discharge groove. During this process, a small amount of blood flows out simultaneously. After the impurities are discharged, the spring returns to its original length and pushes the connecting ring to re-insert into the limiting groove.

[0012] As a further embodiment of the present invention: the upper and lower ends of the processing tube are respectively threaded with a connecting tube one and a connecting tube two, the outer circular surface of the connecting tube one is threaded with a receiving box one, and the outer circular surface of the connecting tube two is threaded with a receiving box two.

[0013] As a further embodiment of the present invention: a connecting groove is provided at the bottom of the receiving box one, a connecting plate is fixedly connected to the top of the receiving box two, the connecting plate is inserted into the connecting groove, and the impurity discharge component is located between the receiving box one and the receiving box two to collect the discharged impurities and a small amount of blood.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] 1. In this invention, a conical filter structure with elastic floating function is constructed through the filter element, which can stably intercept blood clots, fibrin aggregates and microthrombi generated during extracorporeal circulation during hemodialysis, avoiding the risk of vascular embolism caused by impurities flowing back into the patient's body. The conical arrangement of the filter cloth can increase the contact area between blood and the filter surface, improve the impurity interception efficiency and slow down the filter cloth clogging rate. Combined with the elastic floating design of the spring, it provides the core power support for gravity-triggered automatic impurity removal, effectively adapting to the continuous use requirements of long-term hemodialysis treatment;

[0016] 2. In this invention, the gravity-triggered automatic discharge and closed-loop collection of coagulation impurities are achieved through the impurity removal component, eliminating the need for manual shutdown to disassemble and clean the filter cloth. This ensures the continuity of hemodialysis treatment throughout the entire process, avoiding interruptions that could affect blood purification. The closed receiving box structure isolates the external environment, preventing blood from being contaminated by pathogens during the impurity removal process. At the same time, it collects the small amount of blood that overflows with impurities, keeping the area around the device clean, reducing the operational burden and occupational exposure risk for medical staff, and improving the operational safety and convenience of dialysis treatment. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0018] Figure 2 This is a cross-sectional view of the overall structure in this invention;

[0019] Figure 3 This is a schematic diagram of the processing tube in this invention;

[0020] Figure 4 This is a schematic diagram of the internal structure of the processing tube in this invention;

[0021] Figure 5 This is a schematic diagram of the support rod structure in this invention;

[0022] Figure 6 This is a schematic diagram of the structure of the impurity removal groove in this invention;

[0023] Figure 7 This is a schematic diagram of the connecting pipe in this invention;

[0024] Figure 8 This is a schematic diagram of the receiving box in this invention;

[0025] Figure 9 In this invention Figure 8 A schematic diagram of the structure at point A.

[0026] In the diagram: 1. Filter element; 11. Treatment pipe; 12. Fixing ring; 13. Baffle pipe; 14. Connecting ring one; 15. Connecting ring two; 16. Support rod; 17. Top block; 18. Filter cloth; 19. Insert post; 110. Spring; 2. Impurity discharge element; 21. Impurity discharge groove; 22. Guide plate; 23. Connecting post; 24. Limiting groove; 25. Connecting pipe one; 26. Connecting pipe two; 27. Receiver box one; 28. Receiver box two; 29. ​​Connecting groove; 210. Connecting plate. Detailed Implementation

[0027] 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.

[0028] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and 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, and therefore should not be construed as a limitation of this invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of this invention, it should be noted that unless otherwise explicitly specified and limited, the terms "installed," "connected," "linked," and "set up" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. The following describes embodiments of the invention based on its overall structure.

[0029] Reference Figures 1 to 2In this embodiment of the invention, a coagulation filtration device for hemodialysis includes: a filter element 1, and a debris removal element 2 is provided on the filter element 1.

[0030] Reference Figures 3 to 5 The filter element 1 includes a treatment tube 11, a fixing ring 12 fixedly connected inside the treatment tube 11, a baffle tube 13 penetrating through the inner side of the fixing ring 12, and the baffle tube 13 slidably inserted into the fixing ring 12, a connecting ring 14 fixedly connected to the top of the baffle tube 13, the top of the connecting ring 14 having a through hole, a connecting ring 15 disposed inside the treatment tube 11, a support rod 16 fixedly connected to the top of the connecting ring 15, a top block 17 fixedly connected to the top of the support rod 16, a filter cloth 18 sleeved on the outside of the connecting ring 15, the support rod 16, and the top block 17, the filter cloth 18 being circular, and the outer side of the filter cloth 18 extending and folding back to below the connecting ring 15. The bottom of the second ring 15 is fixedly connected with a post 19, which penetrates the filter cloth 18 and is inserted into the insertion hole. The top of the fixing ring 12 is fixedly connected with a spring 110, which is fixedly connected to the bottom of the first ring 14. There are four sets of support rods 16, which are evenly distributed on the top of the second ring 15 and are tapered, with the top being smaller and the bottom being larger. The support rods 16 are flush with the side of the second ring 15. The top block 17 is hemispherical. There are six sets of insertion holes, which are evenly distributed on the top of the first ring 14. There are six sets of post 19, each set of post 19 is inserted into a set of insertion holes. There are six sets of springs 110, which are evenly distributed on the bottom of the first ring 14.

[0031] The above scheme is adopted as follows: the connecting ring 15, the support rod 16 and the top block 17 form a conical support frame, which expands the filter cloth 18 to form a conical filter surface that is smaller at the top and larger at the bottom, thereby increasing the effective contact area between blood and the filter cloth 18 and improving the interception effect of impurities such as blood clots and fibrin. The insertion of the insert post 19 and the insertion hole on the connecting ring 14 enables the quick assembly and disassembly of the filter cloth 18 support assembly and the floating structure, which facilitates the replacement and disinfection maintenance of the filter cloth 18. The fixing ring 12 and the connecting ring 14 are connected by the spring 110, and the elastic force of the spring 110 serves as the power source for the floating reset, providing a structural basis for the gravity-triggered downward movement and automatic reset of the filter assembly.

[0032] Reference Figures 6 to 9The waste removal component 2 includes a waste removal groove 21 that extends through the side end of the processing pipe 11. A guide plate 22 is fixedly connected to the bottom of the waste removal groove 21. The guide plate 22 is annular and extends to the outside of the processing pipe 11. The cross-section of the guide plate 22 is V-shaped. A connecting post 23 is fixedly connected to the top of the waste removal groove 21. The bottom end of the connecting post 23 is fixedly connected to the top of the guide plate 22. A limit groove 24 is provided inside the processing pipe 11. In the initial state, the spring 110 is in the extended state. The connecting ring 14 is pushed into the limiting groove 24. A magnetic block 1 is embedded in the outer surface of the connecting ring 14, and a magnetic block 2 is embedded in the inner side of the limiting groove 24. The corresponding surfaces of the magnetic blocks 1 and 2 are opposite poles. When the connecting ring 14 is in the limiting groove 24, the connecting ring 14 and the limiting groove 24 are magnetically attracted and connected, ensuring that the connecting ring 14 is stably positioned within the limiting groove 24 and will not shake due to blood flow. As impurities accumulate on the filter cloth 18, the gravity on the connecting ring 14 increases until... The magnetic connection between the connecting ring 14 and the limiting groove 24 is released, and the spring 110 is compressed to its limit position. The area where the filter cloth 18 is located moves down to the impurity discharge groove 21. The impurities accumulated on the filter cloth 18 flow through the impurity discharge groove 21 to the guide plate 22. During this process, a small amount of blood flows out simultaneously. After the impurities are discharged, the spring 110 returns to its original length, pushing the connecting ring 14 to re-insert into the limiting groove 24. The upper and lower ends of the processing tube 11 are respectively threaded with connecting tube 25 and connecting tube 26. Connector 1 25 is threaded to a receiving box 1 27 on its outer circular surface, and connector 2 26 is threaded to a receiving box 28 on its outer circular surface. The bottom end of receiving box 1 27 has a connecting groove 29, and the top end of receiving box 28 is fixedly connected to a connecting plate 210. The connecting plate 210 is inserted into the connecting groove 29. The impurity discharge component 2 is located between receiving box 1 27 and receiving box 28 to collect the discharged impurities and a small amount of blood. During the filtration process, the impurity discharge component 2 is kept in a sealed space to prevent the blood from being contaminated.

[0033] The above solution employs a waste removal groove 21 that runs through the side wall of the treatment pipe 11. Combined with a V-shaped guide plate 22, this guides and discharges impurities accumulated on the surface of the filter cloth 18 after it has moved downwards, preventing impurities from accumulating and clogging the filter cloth 18 inside the pipe. A limiting groove 24 radially limits the connecting ring 14, and the opposing poles of magnetic blocks 1 and 2 adhere to each other, locking the position of the connecting ring 14 under normal filtration conditions. This prevents the filter assembly from shifting due to blood flow impact, ensuring the filtration process is safe. For stability, the threaded connection structure of connecting pipe 1 25 and connecting pipe 26 enables the detachable installation of receiving box 1 27 and receiving box 2 28, facilitating the regular cleaning of collected impurities and waste liquid. Through the plug-in cooperation of connecting groove 29 and connecting plate 210, receiving box 1 27 and receiving box 2 28 are spliced ​​to form a closed cavity, completely accommodating the impurity discharge component 2, isolating it from the external environment, preventing blood from being contaminated during the impurity discharge process, and simultaneously collecting the small amount of blood flowing out during the impurity discharge to maintain the cleanliness of the surrounding area of ​​the device.

[0034] The working principle of this invention is as follows: First, the device assembly and pipeline connection pre-priming are performed. Before hemodialysis treatment begins, the overall assembly of the coagulation filtration device and the adaptation of the dialysis pipeline are completed: First, the upper and lower ends of the processing tube 11 are respectively threaded to the connecting tube 25 and the connecting tube 26. Then, the receiving box 28 is screwed and fixed to the outer surface of the connecting tube 26 through the internal thread structure. Next, the receiving box 27 is aligned with the connecting tube 25 and screwed in. During the rotation, the connecting plate 210 at the top of the receiving box 28 is precisely inserted into the connecting groove 29 at the bottom of the receiving box 27 until the end face of the receiving box 27 and the receiving box 28 are tightly fitted, forming a sealed collection cavity that completely encloses the impurity removal component 2, preventing external contaminants from contacting the interior. Finally, the connecting tube 1 25 and connecting tube 2 26 are connected in series to the venous end of the extracorporeal circulation line of the hemodialysis system, ensuring that the blood flows into the device from the connecting tube 1 25, is filtered and purified by the filter cloth 18, and then flows out from the connecting tube 2 26 and is reinfused into the patient. After the assembly is completed and the tubing is connected, the device and the entire dialysis tubing are fully pre-flushed and vented with sterile saline. The saline flows from top to bottom through the inner cavity of the processing tube 11, passes through the filter surface of the filter cloth 18, the inner ring of the connecting ring 14, and the inner cavity of the baffle tube 13, and then flows out from the connecting tube 2 26. The inner wall of the processing tube 11, the gaps of the filter cloth 18, and the inside of the receiving box are repeatedly flushed and drained. After the pre-flushing is completed, both ends of the tubing are sealed and the device is ready for use.

[0035] The second step involves stable operation under normal filtration conditions. After the hemodialysis treatment is officially started, the blood, initially purified by the dialyzer, flows from the venous end tubing into the connecting tube 25, enters the processing tube 11, and flows from top to bottom towards the filter assembly. Initially, the spring 110 is in a naturally extended state, and its upward elastic force pushes the connecting ring 14 upward along the guide tube 13, eventually locking into the limiting groove 24 on the inner wall of the processing tube 11. At this time, the magnetic block 1 embedded on the outer surface of the connecting ring 14 and the magnetic block 2 embedded on the inner side of the limiting groove 24 form opposite pole adsorption, generating a stable adsorption force to lock the position of the connecting ring 14, so that the connecting ring 14 and the filter cloth 18 assembly suspended below are stably maintained in a high filtration position, and will not move up and down or radially due to the continuous flow of blood. When the blood passes through the top hemispherical block 17, it is evenly diverted by the arc-shaped curved surface and spreads evenly in all directions along the four cone-shaped support rods 16, fully covering the cone-shaped filter surface of the filter cloth 18. Impurities such as blood clots, fibrin aggregates, and platelet microemboli mixed in the blood are intercepted by the filter cloth 18 and gradually accumulate on the upper surface of the filter cloth 18. The filtered clean blood passes through the mesh of the filter cloth 18, flows into the inner lumen of the baffle tube 13 and flows downward, and finally flows out of the device through the connecting tube 26 and is returned to the patient's vein. During this process, the baffle tube 13 is kept in a high position synchronously with the connecting ring 14, and its side wall is tightly fitted with the inner ring of the fixing ring 12, completely sealing the inner opening of the discharge groove 21, preventing blood from flowing out of the discharge groove 21 directly without being filtered by the filter cloth 18, and ensuring the filtration effectiveness.

[0036] The third step involves automatic impurity removal triggered by impurity accumulation. As dialysis treatment continues, the coagulation impurities intercepted on the filter cloth 18 accumulate, gradually increasing the overall weight of the filter cloth 18, connecting ring 15, support rod 16, top block 17, and attached impurities. This weight is completely transferred to the connecting ring 14 through the insertion structure of the insertion post 19 and the insertion hole, causing the connecting ring 14 to experience a continuously increasing downward pulling force. When the amount of impurities accumulated on the filter cloth 18 reaches a preset threshold, the total downward force exceeds the sum of the attraction force of magnetic blocks 1 and 2 and the initial elastic force of spring 110. The magnetic attraction connection is instantly released, and the connecting ring 14 drives the baffle tube 13 to slide vertically downward along the inner ring of the fixed ring 12. The spring 110 is gradually released. By compressing and storing elastic potential energy, when the spring 110 is compressed to its limit position, the area where the filter cloth 18 is located moves down to the corresponding height of the discharge groove 21. The baffle tube 13 moves down and no longer blocks the inner opening of the discharge groove 21. The blood clots accumulated on the filter cloth 18 slide outward from the processing tube 11 through the annular discharge groove 21 under the combined action of continuous blood flushing and its own gravity, and fall on the inclined surface of the guide plate 22. They slide down along the slope of the figure-eight guide plate 22 to the bottom of the sealed cavity formed by the receiving box 1 27 and the receiving box 28. During the discharge process, a small amount of blood will flow out of the device along with the impurities and be collected in the sealed cavity, so as not to leak out and cause environmental pollution or cross-infection.

[0037] In the fourth step, the filter assembly automatically resets and cycles. After most of the blood clot impurities on the surface of the filter cloth 18 are discharged, the overall gravity of the filter cloth 18 and the supporting structure is greatly reduced. At this time, the downward force is less than the upward elastic force generated by the compression of the spring 110. The spring 110 begins to gradually extend and release elastic potential energy, pushing the connecting ring 14 to slide vertically upward along the inner ring of the fixed ring 12, causing the filter cloth 18 assembly to move upward synchronously back to the filtration position. When the connecting ring 14 rises to the height of the limiting groove 24, the magnetic block 1 and the magnetic block 2 generate opposite polarity adsorption force again, assisting the connecting ring 14 to accurately lock into the limiting groove 24 to complete the positioning. The baffle tube 13 then moves upward to re-seal the inner opening of the impurity discharge groove 21. The device is completely restored to the normal filtration state and continues to intercept and filter blood clot impurities. During the entire hemodialysis treatment process, the above process of "filtration interception - impurity accumulation - triggering impurity discharge - automatic reset" can be automatically cycled without medical staff having to stop the machine to disassemble and clean the filter cloth 18, effectively ensuring the continuity and stability of dialysis treatment.

[0038] The fifth step is cleaning and maintenance after treatment. After the hemodialysis treatment is completed, the device and tubing are first flushed with sterile saline to return all the residual blood in the tubing and device to the patient, reducing blood loss. Then disconnect the device from the dialysis tubing, unscrew the receiving box 1 27 and receiving box 2 28 in the opposite direction, pour out the collected coagulation impurities and waste liquid, and dispose of them in accordance with medical waste regulations. Alternatively, the receiving boxes can be disinfected and reused. At the same time, the insert 19 can be pulled upwards to remove the filter cloth 18 and support components from the connecting ring 14, replace the new sterile filter cloth 18, or thoroughly disinfect and sterilize the components to prepare for the next treatment.

[0039] The filter element 1 constructs a conical filter structure with elastic floating function, which can stably intercept blood clots, fibrin aggregates, and microthrombi generated during extracorporeal circulation during hemodialysis, avoiding the risk of vascular embolism caused by impurities flowing back into the patient's body. The conical arrangement of the filter cloth 18 can increase the contact area between blood and the filter surface, improving the impurity interception efficiency while slowing down the clogging rate of the filter cloth 18. Combined with the elastic floating design of the spring 110, it provides the core power support for gravity-triggered automatic impurity removal, effectively adapting to the continuous use requirements of long-term hemodialysis treatment. The impurity removal element 2 realizes gravity-triggered automatic discharge and closed collection of coagulated impurities, eliminating the need for manual shutdown to disassemble and clean the filter cloth 18, thus maintaining the continuity of hemodialysis treatment throughout the process and avoiding interruption of treatment that affects the blood purification effect. The closed receiving box structure can isolate the external environment, prevent blood from being contaminated by pathogens during impurity removal, and collect the small amount of blood that overflows with impurities, keeping the area around the device clean, reducing the operational burden and occupational exposure risk of medical staff, and improving the operational safety and convenience of dialysis treatment.

[0040] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A coagulation filtration device for hemodialysis, comprising: The filter element (1) is characterized in that a debris discharge element (2) is provided on the filter element (1); The filter element (1) includes a processing tube (11), a fixing ring (12) is fixedly connected inside the processing tube (11), a baffle tube (13) is provided through the inner side of the fixing ring (12), and the baffle tube (13) is slidably inserted into the fixing ring (12). A connecting ring one (14) is fixedly connected to the top end of the baffle tube (13), and an insertion hole is provided through the top end of the connecting ring one (14). A connecting ring two (15) is provided inside the processing tube (11), and a support rod (16) is fixedly connected to the top end of the connecting ring two (15). A top block (17) is fixedly connected to the end. A filter cloth (18) is sleeved on the outside of the connecting ring two (15), the support rod (16) and the top block (17). The filter cloth (18) is round and extends outward to the bottom of the connecting ring two (15). A plug (19) is fixedly connected to the bottom of the connecting ring two (15). The plug (19) penetrates the filter cloth (18) and is inserted into the plug hole. A spring (110) is fixedly connected to the top of the fixing ring (12). The top of the spring (110) is fixedly connected to the bottom of the connecting ring one (14).

2. The coagulation filtration device for hemodialysis according to claim 1, characterized in that, The support rod (16) is provided in four groups, which are evenly distributed at the top of the connecting ring two (15) and the four groups are distributed in a conical shape, with the top smaller and the bottom larger. The support rod (16) is flush with the side end of the connecting ring two (15), and the top block (17) is hemispherical.

3. A coagulation filtration device for hemodialysis according to claim 2, characterized in that, The sockets are provided in six groups, evenly distributed at the top of the connecting ring (14). The posts (19) are provided in six groups, each group of posts (19) is inserted into a set of sockets. The springs (110) are provided in six groups, evenly distributed at the bottom of the connecting ring (14).

4. A coagulation filtration device for hemodialysis according to claim 3, characterized in that, The discharge component (2) includes a discharge groove (21) that runs through the side end of the processing pipe (11). A guide plate (22) is fixedly connected to the bottom of the discharge groove (21). The guide plate (22) is annular and extends to the outside of the processing pipe (11). The cross section of the guide plate (22) is V-shaped.

5. A coagulation filtration device for hemodialysis according to claim 4, characterized in that, The top of the discharge trough (21) is fixedly connected to a connecting column (23), the bottom of the connecting column (23) is fixedly connected to the top of the guide plate (22), and a limiting groove (24) is opened on the inner side of the processing pipe (11). In the initial state, the spring (110) is in the extended state, pushing the connecting ring (14) into the limiting groove (24).

6. A coagulation filtration device for hemodialysis according to claim 5, characterized in that, The outer surface of the connecting ring (14) is embedded in the magnetic block, and the inner side of the limiting groove (24) is embedded with the magnetic block. The corresponding surfaces of the magnetic block and the magnetic block are opposite poles. When the connecting ring (14) is in the limiting groove (24), the connecting ring (14) and the limiting groove (24) are magnetically attracted and connected. As the impurities accumulated on the filter cloth (18) increase, the gravity on the connecting ring (14) increases until the magnetic connection between the connecting ring (14) and the limiting groove (24) is released. The spring (110) is compressed to the limit position, and the area where the filter cloth (18) is located moves down to the impurity discharge groove (21). The impurities accumulated on the filter cloth (18) flow to the guide plate (22) through the impurity discharge groove (21). During this process, a small amount of blood flows out simultaneously. After the impurities are discharged, the spring (110) returns to its original length and pushes the connecting ring (14) to re-insert into the limiting groove (24).

7. A coagulation filtration device for hemodialysis according to claim 6, characterized in that, The processing tube (11) is threaded with connecting tube one (25) and connecting tube two (26) at its upper and lower ends respectively. The outer surface of the connecting tube one (25) is threaded with receiving box one (27), and the outer surface of the connecting tube two (26) is threaded with receiving box two (28).

8. A coagulation filtration device for hemodialysis according to claim 7, characterized in that, The bottom of the receiving box one (27) is provided with a connecting groove (29), and the top of the receiving box two (28) is fixedly connected with a connecting plate (210). The connecting plate (210) is inserted into the connecting groove (29). The impurity discharge component (2) is located between the receiving box one (27) and the receiving box two (28) to collect the discharged impurities and a small amount of blood.

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