Hemodialysis device for nephrology department

Abstract

The invention discloses a hemodialysis device for the nephrology department, and relates to the technical field of medical machinery, the hemodialysis device comprises a dialyzer, the top of the dialyzer is detachably connected with a storage unit, and an equipartition mechanism is arranged in the storage unit; the uniform distribution mechanism comprises a dispersion disc and a rotating block, the rotating block is rotationally connected with the dispersion disc, a butt joint disc is arranged at one end of the rotating block, butt joint grooves are uniformly distributed in the butt joint disc, and blood holes are uniformly distributed in the dispersion disc. Through dynamic butt joint of a rotating block, a butt joint disc and a blood hole of a dispersion disc of the equipartition mechanism, blood is uniformly dispersed to the surface of a dialysis membrane, local accumulation is avoided, the membrane area is utilized to the maximum extent, the toxin removal efficiency is improved, meanwhile, the blood flowing path is optimized through the inclined design of a flow guide plate and through holes, resistance is reduced, the blood can rapidly flow, and the efficiency of toxin removal is improved. And in addition, through height difference falling and the optimized design of the flow guide plate, the mixing of bubbles in blood is reduced, and the dialysis safety and effect are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of medical machinery, and particularly relates to a hemodialysis device for nephrology. Background Art

[0002] Hemodialysis in nephrology is an important means for treating renal failure and acute kidney injury. Through the dialysis membrane in the dialyzer, the blood is filtered to remove metabolic wastes and excess water in the body. As an important treatment means for end-stage renal disease patients, the efficiency of the core device, the dialysis device, directly affects the toxin clearance rate and patient comfort.

[0003] Traditional hemodialysis devices generally have the following technical pain points: when the existing dialysis devices introduce blood into the dialyzer, it is often impossible to achieve uniform distribution of the blood, resulting in low dialysis efficiency, uneven dialysis effect, and even local overload of the dialysis membrane, affecting the dialysis effect. Existing devices mostly adopt centralized introduction, and blood is prone to local accumulation (laminar flow effect) on the surface of the dialysis membrane. When the single-point flux exceeds, the utilization rate of the effective contact area of the dialysis membrane decreases, not only reducing the clearance rate of middle molecular toxins, but also triggering the protein polarization phenomenon and accelerating membrane fouling. Clinical data statistics show that dialysis insufficiency is caused thereby. More seriously, the traditional vertical injection method increases the amount of bubble generation, directly triggering dialysis-related hypoxemia. Summary of the Invention

[0004] The purpose of the present invention is to provide a hemodialysis device for nephrology to solve the problems described in the above background art.

[0005] The purpose of the present invention can be achieved through the following technical solutions:

[0006] A hemodialysis device for nephrology includes a dialyzer. A storage unit is detachably connected to the top of the dialyzer, and an equalizing mechanism is arranged in the storage unit;

[0007] The equalizing mechanism includes a dispersion plate and a rotating block. The rotating block is rotatably connected to the dispersion plate, and a docking plate is arranged at one end of the rotating block. Docking grooves are evenly distributed on the docking plate, and blood holes are evenly distributed on the dispersion plate. The blood is evenly distributed into the dialyzer through the rotation of the rotating block and the docking with the dispersion plate.

[0008] As a further solution of the present invention: The equalizing mechanism further includes a push rod connected to the rotating block for assisting blood distribution.

[0009] As a further solution of the present invention: A dispersion mechanism is arranged on the storage unit for blood dispersion and driving the rotation of the push rod.

[0010] As a further solution of the present invention: The dispersion mechanism includes an upper connection disk, which is installed on one side of the storage unit and is rotatably connected to a transmission pipe in the middle;

[0011] A connector head, which rotates at one end of the transmission pipe;

[0012] A support plate, which is fixedly connected to the surface of the upper connection disk;

[0013] A connection frame, which is connected to the other end of the connector head and internally fixedly connected with a diversion plate. At the same time, docking rods are fixedly connected to both sides of the connection frame;

[0014] A driving component one, which is installed on the surface of the upper connection disk and is used to drive the transmission pipe to rotate along the middle of the upper connection disk.

[0015] As a further solution of the present invention: The end of the docking rod away from the diversion plate is docked with a push rod, and the transmission pipe is movably installed in the middle of the support plate.

[0016] As a further solution of the present invention: A plurality of annularly arranged fixing blocks are provided on the outer wall of the storage unit, and a connection block is slidably connected in the fixing block. At the same time, a connection ring is provided on the top of the connection block.

[0017] As a further solution of the present invention: An adjusting mechanism is provided at the bottom of the connection block for adjusting the blood distribution efficiency and speed.

[0018] As a further solution of the present invention: The adjusting mechanism includes an extension block, which is fixedly installed at the bottom of the connection block and a rotating shaft fixedly connected with a limiting rod is slidably connected in the middle;

[0019] A docking plate, which is fixedly connected to one end of the rotating shaft;

[0020] An electric push rod, which is fixedly connected to one side of the extension block and is used to push and pull the rotating shaft;

[0021] A driving component two, which is installed on the extension block and is used to drive the rotating shaft and the limiting rod to rotate along the middle of the extension block.

[0022] As a further solution of the present invention: The connection block further includes a leak-proof block, which slides in the extension block and the leak-proof block;

[0023] A limiting plate, which is fixedly connected in the leak-proof block and is used for docking during pushing and pulling.

[0024] As a further solution of the present invention: The limiting plate is arranged in the leak-proof block, and a slider that slides in the extension block and the docking disk is arranged in the middle of the leak-proof block.

[0025] The beneficial effects of the present invention:

[0026] (1) Through the dynamic docking of the rotating block, docking disc, and blood holes on the dispersion disc of the equalization mechanism in the present invention, the blood is evenly dispersed onto the surface of the dialysis membrane, avoiding local accumulation, maximizing the utilization of the membrane area, improving the toxin clearance efficiency. At the same time, through the inclined design of the diversion plate and the through holes, the blood flow path is optimized, reducing resistance, enabling the blood to flow quickly, reducing the pain of patients, and through the optimized design of the height difference drop and the diversion plate, reducing the mixing of air bubbles in the blood, improving the safety and effectiveness of dialysis;

[0027] (2) In the present invention, in the dispersion mechanism, the inclined design and rotational dispersion function of the diversion plate utilize centrifugal force to make the blood spread smoothly, reducing the probability of air bubble generation. The blood enters the dialyzer through free fall due to the height difference, further releasing potential air bubbles.

[0028] (3) In the present invention, through the coordinated action of the electric push rod and the drive assembly in the adjustment mechanism, the rotation speed of the docking disc and the blood distribution efficiency can be dynamically adjusted according to the specific conditions of the patient, improving the accuracy of dialysis. At the same time, the adjustment mechanism controls the number of blockages of the leakage prevention block on the docking groove through the electric push rod and the gear set, dynamically limiting the blood flow, adapting to the tolerance thresholds of different patients or changes in the performance of the dialysis membrane;

[0029] (4) In the present invention, components such as the storage unit, dispersion mechanism, and equalization mechanism are connected by card slots and slide rails, which can be quickly disassembled and cleaned to avoid residual contamination. The sliding structure of the fixing block and the connecting ring supports the overall machine for disassembly and maintenance, reducing the possibility of cross-infection. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The present invention will be further described below in conjunction with the drawings.

[0031] Figure 1 is the structural schematic diagram of the present invention;

[0032] Figure 2 is the schematic diagram of the extracorporeal blood circulation path during dialysis of the present invention;

[0033] Figure 3 is the structural exploded view of the present invention;

[0034] Figure 4 is the structural exploded schematic diagram of the dispersion mechanism in the present invention;

[0035] Figure 5 is Figure 4 the enlarged view of part A in

[0036] Figure 6 is the structural schematic diagram of the equalization mechanism in the present invention;

[0037] Figure 7 is the structural schematic diagram of the adjustment mechanism in the present invention;

[0038] Figure 8 It is a partial sectional structure schematic diagram of the adjustment mechanism in the present invention.

[0039] In the figure: 1, dialyzer; 2, storage unit; 3, dispersion mechanism; 30, upper connection disk; 31, connection head; 32, transmission pipe; 33, motor 1; 34, gear 1; 35, gear 2; 36, connection frame; 37, support plate; 38, guide plate; 39, docking rod; 4, equalization mechanism; 40, dispersion disk; 41, blood hole; 42, rotating block; 43, push rod; 44, docking disk; 45, docking groove; 5, adjustment mechanism; 50, leak-proof block; 51, electric push rod; 52, extension block; 53, motor 3; 54, gear 3; 55, gear 4; 56, rotating shaft; 57, limiting rod; 58, limiting plate; 59, docking plate; 6, fixing block; 7, connection ring; 8, connection block; 9, inlet blood pipe; 10, outlet blood pipe; 11, blood pump; 12, syringe; 13, waste water pipe; 14, reverse osmosis water pipe. Specific embodiments

[0040] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0041] Embodiment 1

[0042] Please refer to Figures 1-8 As shown, the present invention is a hemodialysis device for nephrology, including a dialyzer 1, the top of the dialyzer 1 is connected to the storage unit 2 through a threaded structure, and an equalization mechanism 4 is arranged in the storage unit 2;

[0043] One end of the dialyzer 1 is connected to a waste water pipe 13, the side of the dialyzer 1 away from the waste water pipe 13 is connected to a reverse osmosis water pipe, the bottom of the dialyzer 1 is connected to an outlet blood pipe 10, and the other end of the outlet blood pipe 10 is connected back to the human body after dialysis;

[0044] The equalization mechanism 4 includes a dispersion disk 40 fixedly installed in the storage unit 2, a plurality of blood holes 41 are arranged on the dispersion disk 40, a rotating block 42 is rotatably connected to the middle thereof through a bearing, and one end of the rotating block 42 is fixedly connected to a docking disk 44, and four docking grooves 45 are evenly distributed on the docking disk 44;

[0045] The rotating block 42 drives the docking disk 44 to rotate through an external driving device, so that the docking groove 45 is dynamically docked with the blood holes 41 evenly distributed on the dispersion disk 40, thereby realizing the uniform distribution of blood and falling into the dialyzer 1 for dialysis.

[0046] It should be noted that the storage unit 2 is arranged as a circular tank body;

[0047] A dialysis membrane is arranged inside the dialyzer 1 for filtering blood.

[0048] In the present invention, preferably, the equalizing mechanism 4 further includes two groups of push rods 43. The push rods 43 are made of corrosion-resistant materials. One end of each push rod 43 is fixedly connected to both sides of the rotating block 42, and the other end is attached to the surface of the dispersion disc 40 for assisting in the uniform distribution of blood.

[0049] In the present invention, preferably, a dispersion mechanism 3 is arranged on the storage unit 2. The dispersion mechanism 3 is connected to the equalizing mechanism 4 for initially dispersing the input blood and further optimizing the blood distribution efficiency through the movement of the push rods 43.

[0050] In the present invention, preferably, the dispersion mechanism 3 includes:

[0051] An upper connecting disc 30 is installed on one side of the storage unit 2, and a transmission pipe 32 is rotatably connected to the middle thereof through a bearing;

[0052] A connector 31 is arranged at one end of the transmission pipe 32 for connecting to an external blood transfusion device;

[0053] One end of the connector 31 is connected to the blood inlet pipe 9. One side of the flow path of the blood inlet pipe 9 is connected with a syringe 12 for adding insulin or other drugs. The output path of the blood inlet pipe 9 is conveyed through a blood pump 11, and the other end of the blood inlet pipe 9 is inserted into the human body for blood extraction.

[0054] A support plate 37 is fixedly connected to the surface of the upper connecting disc 30 for supporting the rotation of the transmission pipe 32;

[0055] A connecting frame 36 is connected to the other end of the connector 31, and a flow guiding plate 38 is fixedly connected inside the connecting frame 36. The flow guiding plate 38 is designed to be inclined to optimize the blood flow path. Through holes are arranged on the flow guiding plate 38, and docking rods 39 are fixedly connected to both sides of the connecting frame 36;

[0056] A driving component one is installed on the surface of the upper connecting disc 30 for driving the transmission pipe 32 to rotate along its middle, thereby driving the entire dispersion mechanism 3 to work;

[0057] The driving component one includes a motor one 33, a gear one 34 and a gear two 35. The motor one 33 is fixedly installed on the surface of the upper connecting disc 30. The output end of the motor one 33 is fixedly connected to the middle of the gear one 34. The gear one 34 meshes with the gear two 35. The gear two 35 is fixedly installed on the outer surface of the transmission pipe 32, and the gear two 35 rotates on the surface of the support plate 37.

[0058] In the present invention, preferably, one end of the docking rod 39 away from the deflector 38 is docked with the push rod 43 through a slot structure, and the transmission tube 32 is movably installed in the middle of the support plate 37 through a sealing structure to ensure that blood will not leak during rotation.

[0059] It should be noted that the sealing structure can be an O-ring or a sealing ring.

[0060] During the implementation process, one end of the blood inlet tube 9 is inserted into the patient's blood vessel, and blood is transported into the connector 31 through the blood pump 11. The blood passes through the connector 31, the transmission tube 32, and the connecting frame 36 and falls onto the deflector 38. Through the inclined design and through holes of the deflector 38, the blood flows quickly and drops onto the surface of the dispersion plate 40. The first motor 33 is provided, and the output end of the first motor 33 drives the first gear 34 to rotate. The first gear 34 drives the second gear 35 and the transmission tube 32 to rotate along the middle parts of the support plate 37 and the upper connecting plate 30. The transmission tube 32 rotates along the connector 31, so that the blood inlet tube 9 connected to the connector 31 does not rotate to reduce interference. The transmission tube 32 drives the connected connecting frame 36 and the deflector 38 to rotate. The rotation of the deflector 38 causes the passing blood to rotate and disperse onto the surface of the dispersion plate 40, so that the concentrated blood is dispersed and dropped to reduce the resistance of blood flow. At the same time, the blood drops due to the height difference, reducing the air bubbles in the blood.

[0061] The rotation of the connecting frame 36 drives the docking rods 39 on both sides to rotate. The docking rods 39 drive the two groups of push rods 43 and the rotating blocks 42 to rotate. The rotating blocks 42 drive the docking disks 44 to rotate inside the dispersion plate 40 and the storage unit 2. The rotation of the docking disks 44 completes the docking of the docking grooves 45 with the blood holes 41 arranged on the dispersion plate 40, so that the blood is evenly divided and dropped into the dialysis membrane inside the dialyzer 1 through the blood holes 41 and the docking grooves 45 for blood cleaning and dialysis, avoiding the inefficiency and poor dialysis effect caused by a large amount of blood accumulating together and passing through the dialysis membrane.

[0062] Embodiment 2

[0063] In the present invention, preferably, four annularly arranged fixing blocks 6 are fixedly connected to the outer wall of the storage unit 2. A slide rail structure is arranged inside the fixing blocks 6, and a connecting block 8 is slidably connected in the slide rail. The top of the connecting block 8 is fixedly connected with a connecting ring 7, and the connecting ring 7 is used to connect with an external fixing device.

[0064] In the present invention, preferably, the bottoms of the four connecting blocks 8 are all fixedly connected with an adjusting mechanism 5, and the adjusting mechanism 5 is connected to the equalizing mechanism 4 for dynamically adjusting the rotation speed of the docking disk 44 and the blood distribution efficiency.

[0065] In the present invention, preferably, the adjusting mechanism 5 includes:

[0066] The extension block 52 is fixedly installed at the bottom of the connection block 8, and a sliding cavity is arranged in the middle thereof. A rotating shaft 56 is slidably connected in the cavity, and one end of the rotating shaft 56 is fixedly connected to the limiting rod 57;

[0067] The docking plate 59 is fixedly connected to the other end of the rotating shaft 56;

[0068] The electric push rod 51 is fixedly connected to one side of the extension block 52 and is used to push and pull the rotating shaft 56 to drive the leak-proof block 50 to move, so as to realize the dynamic adjustment of the docking plate 44;

[0069] The second driving component is installed on the extension block 52 and is used to drive the rotating shaft 56 and the limiting rod 57 to rotate along the middle of the extension block 52 to adapt to different blood distribution requirements;

[0070] The second driving component includes a motor three 53, a gear three 54 and a gear four 55. The motor three 53 is fixedly connected to the surface of the extension block 52, the output end of the motor three 53 is fixedly connected to the middle of the gear three 54, and the gear four 55 slides on the surfaces of the rotating shaft 56 and the limiting rod 57, and the gear three 54 and the gear four 55 are meshed with each other.

[0071] It should be noted that a through groove is arranged at the docking part of the extension block 52 and the storage unit 2.

[0072] In the present invention, preferably, the connection block 8 further includes a leak-proof block 50. The leak-proof block 50 is connected to the extension block 52 through a sliding structure, and a limiting plate 58 is arranged inside it. The limiting plate 58 is used to provide stable docking support during the pushing and pulling process to ensure the sealing performance and stability of the device during operation.

[0073] In the present invention, preferably, the limiting plate 58 is arranged in a groove opened at one end of the leak-proof block 50, and a sliding structure is arranged in the middle of the leak-proof block 50. The sliding structure includes a slider, and the slider is slidably installed in the sliding rails opened in the extension block 52 and the docking plate 44, and is used to provide guiding and sealing functions during the adjustment process.

[0074] During the implementation process, the electric push rod 51 is set. The output end of the electric push rod 51 pulls the rotating shaft 56 and the limiting rod 57 backward. The rotating shaft 56 pulls the docking plate 59 backward and slides to one side along the middle of the gear four 55. The docking plate 59 pulls the limiting plate 58. The limiting plate 58 drives the leak-proof block 50 to slide out of the docking groove 45 and the sliding rail in the docking plate 44 and be received into the extension block 52 under the thrust of the docking plate 59, so that the docking groove 45 is not blocked and is convenient to dock with the blood holes 41 on the dispersion plate 40;

[0075] When the patient feels pain due to too fast blood dialysis speed or the dialysis effect of the dialysis membrane weakens, set the third motor 53. The output end of the third motor 53 drives the third gear 54 to rotate. The third gear 54 drives the fourth gear 55 to rotate. The fourth gear 55 drives the rotating shaft 56 and the limiting rod 57 to rotate along the middle part of the extension block 52. The rotating shaft 56 drives the docking plate 59 to rotate, so that the docking plate 59 rotates 180° and intersects with the limiting plate 58. Set the electric push rod 51. The output end of the electric push rod 51 drives the rotating shaft 56 and the limiting rod 57 to move to one side along the middle parts of the extension block 52 and the fourth gear 55. When the docking plate 59 moves to the outside of the limiting plate 58, set the third motor 53. The output end of the third motor 53 drives the third gear 54 to rotate. The third gear 54 drives the fourth gear 55 to rotate. The fourth gear 55 drives the rotating shaft 56 and the limiting rod 57 to rotate along the middle part of the extension block 52. The rotating shaft 56 drives the docking plate 59 to rotate, so that the docking plate 59 rotates 180° and is parallel to the limiting plate 58. Set the electric push rod 51. The output end of the electric push rod 51 pushes the rotating shaft 56 and the limiting rod 57. The rotating shaft 56 pushes the docking plate 59. The docking plate 59 pushes the limiting plate 58. The limiting plate 58 drives the leak-proof block 50 to be pushed out along the extension block 52 and pushed into the docking groove 45 in the docking disk 44, selectively blocking the four docking grooves 45, so as to reduce the number of the docking grooves 45 on the docking disk 44 that are docked with the blood holes 41, thereby adjusting the speed of the blood dropping into the dialyzer 1 through the docking grooves 45, reducing the pain of the patient or slowing down the speed of the dialysis membrane passing through the blood to improve the accuracy of dialysis. After pushing the leak-proof block 50 into the docking groove 45, set the third motor 53 again. The output end of the third motor 53 drives the third gear 54 to rotate. The third gear 54 drives the fourth gear 55 to rotate. The fourth gear 55 drives the rotating shaft 56 and the limiting rod 57 to rotate along the middle part of the extension block 52. The rotating shaft 56 drives the docking plate 59 to rotate, so that the docking plate 59 rotates 180° and intersects with the limiting plate 58. Set the electric push rod 51. The output end of the electric push rod 51 drives the rotating shaft 56 and the limiting rod 57 to move along the middle parts of the extension block 52 and the fourth gear 55, so that the docking plate 59 is received into the extension block 52 to reduce the interference during the rotation of the docking disk 44;

[0076] When disassembly and cleaning are required, remove the limit pin fixing the upper connection disk 30, pull the dispersion mechanism 3, so that the dispersion mechanism 3 slides out from one side of the storage unit 2, and the docking rod 39 and the push rod 43 are disengaged. Remove the limit pin fixing the dispersion disk 40, pull the equalization mechanism 4, and the equalization mechanism 4 is taken out along the other side of the storage unit 2. Pull the connecting ring 7. The connecting ring 7 drives the connecting block 8 and the adjustment mechanism 5 to slide out along the fixed block 6, making the components of the dialyzer 1 device more convenient for disassembly and cleaning to reduce cross-infection.

[0077] It should be noted that the first motor 33, the electric push rod 51 and the third motor 53 are coordinately controlled through wireless signal transmission by a controller (not shown) to adjust the accuracy of transmission.

[0078] The embodiments of the present invention have been described in detail above, but the content described is only the preferred embodiment of the present invention and cannot be considered as limiting the scope of implementation of the present invention. All equivalent changes and improvements made according to the scope of the application of the present invention should still fall within the scope covered by the patent of the present invention.

Claims

1. A hemodialysis device for nephrology department, comprising a dialyzer (1), characterized in that, The top of the dialyzer (1) is detachably connected with a storage unit (2), and an equalizing mechanism (4) is arranged in the storage unit (2). The equalizing mechanism (4) includes a dispersion plate (40) and a rotating block (42). The rotating block (42) is rotatably connected to the dispersion plate (40), and a docking plate (44) is arranged at one end of the rotating block (42). Docking grooves (45) are evenly distributed on the docking plate (44), and blood holes (41) are evenly distributed on the dispersion plate (40). The rotation of the rotating block (42) and the docking with the dispersion plate (40) are used to evenly distribute blood into the dialyzer (1).

2. The hemodialysis device for nephrology according to claim 1, characterized in that The equalizing mechanism (4) further includes a push rod (43). The push rod (43) is connected to the rotating block (42) and is used to assist in blood distribution.

3. The hemodialysis device for nephrology according to claim 1, wherein A dispersion mechanism (3) is arranged on the storage unit (2) and is used for blood dispersion and driving the push rod (43) to rotate.

4. A hemodialysis device for nephrology according to claim 3, characterized in that, The dispersion mechanism (3) includes an upper connection plate (30). The upper connection plate (30) is installed on one side of the storage unit (2) and a transmission pipe (32) is rotatably connected to the middle thereof. A connection head (31) rotates at one end of the transmission pipe (32). A support plate (37) is fixedly connected to the surface of the upper connection plate (30). A connection frame (36) is connected to the other end of the connection head (31) and a diversion plate (38) is fixedly connected inside. At the same time, docking rods (39) are fixedly connected to both sides of the connection frame (36). A driving component one is installed on the surface of the upper connection plate (30) and is used to drive the transmission pipe (32) to rotate along the middle of the upper connection plate (30).

5. A renal medicine hemodialysis device according to claim 4, wherein, One end of the docking rod (39) away from the diversion plate (38) is docked with the push rod (43), and the transmission pipe (32) is movably installed in the middle of the support plate (37).

6. A renal medicine hemodialysis device according to claim 1, characterized in that, A plurality of fixing blocks (6) arranged in a circular pattern are arranged on the outer wall of the storage unit (2), and a connection block (8) is slidably connected in the fixing block (6). At the same time, a connection ring (7) is arranged at the top of the connection block (8).

7. The hemodialysis device for nephrology according to claim 6, characterized in that, An adjusting mechanism (5) is arranged at the bottom of the connection block (8) and is used to adjust the blood distribution efficiency and speed.

8. The hemodialysis device for nephrology according to claim 7, characterized in that, The adjusting mechanism (5) includes an extension block (52) fixedly installed at the bottom of the connection block (8), and a rotating shaft (56) fixedly connected with a limiting rod (57) is slidably connected in the middle thereof. A docking plate (59) is fixedly connected to one end of the rotating shaft (56). An electric push rod (51) is fixedly connected to one side of the extension block (52) and is used to push and pull the rotating shaft (56) to move. A driving component two is installed on the extension block (52) and is used to drive the rotating shaft (56) and the limiting rod (57) to rotate along the middle of the extension block (52).

9. The hemodialysis device for nephrology according to claim 7, characterized in that, The connection block (8) further includes a leak-proof block (50) slidable in the extension block (52) and the leak-proof block (50). A limiting plate (58) is fixedly connected in the leak-proof block (50) and is used for docking during pushing and pulling.

10. A renal medicine hemodialysis device according to claim 9, characterized in that, The limiting plate (58) is arranged in the leak-proof block (50), and a slider slidable in the extension block (52) and the docking plate (44) is arranged in the middle of the leak-proof block (50).

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