Dual-filter type blood purification dialysis device

Abstract

The application belongs to the technical field of biomedical engineering industry, and particularly relates to a double-filter type blood purification dialysis device. In the prior art, the overall purification effect is limited. In addition, the arterial and venous blood vessel interfaces are mostly exposed, which is easy to contact with environmental bacteria. This not only increases the work burden of medical staff, but also easily causes bacterial residues due to operation negligence, thereby causing interface pollution. The present application provides the following scheme, which comprises a base, universal wheels are arranged at the bottom of the base, and a rack is fixedly installed on the top of the base. The double-stage purification structure of coarse filtration and fine filtration is adopted to simultaneously remove middle and small molecule toxins. The blood vessel interface is arranged in the mounting groove in the dialysis machine body, and the automatic closing structure of the protective cover is matched. The blood passage is not directly exposed to the external environment, the risk of interface contacting bacteria is eliminated from the structure, manual cleaning and sealing are not needed, and the use safety is further ensured.

Description

Technical Field

[0001] This application relates to the field of biomedical engineering technology, and in particular to a dual-filtration blood purification dialysis device. Background Technology

[0002] A dual-filtration blood purification dialysis device is a medical device primarily used to treat patients with kidney failure. Its function is to replace the kidney's excretory function by filtering and removing waste, excess water, and electrolytes.

[0003] In the existing technology, most blood purification dialysis devices adopt a single filtration structure, which has insufficient cleaning capacity and limited overall purification effect. The arterial and venous blood vessel interfaces of existing devices are mostly exposed, which are easily exposed to environmental bacteria. This not only increases the workload of medical staff, but also makes it easy for bacteria to remain due to operational negligence, thus causing interface contamination. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing blood purification dialysis devices, which mostly use a single filtration structure, resulting in insufficient cleaning capacity and limited overall purification effect; and the fact that the arterial and venous blood vessel interfaces of existing devices are mostly exposed, making them highly susceptible to contact with environmental bacteria, which not only increases the workload of medical staff, but also easily leads to bacterial residue due to operational negligence, thus causing interface contamination. Therefore, this invention proposes a dual-filtration blood purification dialysis device.

[0005] The dual-filtration blood purification dialysis device provided in this application adopts the following technical solution: A dual-filtration blood purification dialysis device includes: The base has casters at all four corners of its bottom. A frame is fixedly mounted on the top of the base, and the dialysis machine body is fixedly mounted on the top of the frame. A display screen is fixedly mounted on the top of the dialysis machine body. The front of the dialysis machine body is equipped with two air traps, a bubble detector, a tubing support bracket, a blood pump, and tubing clamps. It also includes: The mounting slot is located on the lower left side of the front part of the dialysis machine body. The arterial and venous blood vessel interfaces are located on the rear side of the mounting slot. A bracket connecting block is fixedly installed on the left side of the dialysis machine body. A support column is fixedly installed on the top of the dialysis machine body, and a frame is fixedly installed on the top of the support column. The vascular interface protection mechanism is located inside the mounting slot and is used to cover and block arterial and venous vascular interfaces. The vascular interface disinfection mechanism is located on the front side of the dialysis machine body and is used to disinfect arterial and venous vascular interfaces. The power mechanism, located inside the mounting slot, is used to automatically seal the arterial and venous blood vessel interfaces after disinfection. A dual-filtration dialysis fixation mechanism is mounted on a support column; The release mechanism is located on the dual-filter fixing mechanism.

[0006] Furthermore, the vascular interface protection mechanism includes two annular protective covers respectively disposed around the arterial vascular interface and the venous vascular interface. The right side of each of the two annular protective covers is rotatably connected to a cover. The right side of each of the two covers is connected to a rotating shaft. The rotating shaft is rotatably connected to the mounting groove. A handle is installed on the front side of each of the two covers. The bottom end of the rotating shaft extends through the bottom of the mounting groove into the interior of the dialysis machine body. A ratchet is fixedly installed at the bottom end of the rotating shaft.

[0007] Furthermore, the vascular interface disinfection mechanism includes a disinfection box that is slidably disposed on the front side of the dialysis machine body. The front side of the disinfection box is provided with a box body, the inside of the box body is provided with a pump body, the rear side of the box body is fixedly installed with an electric motor, the output end of the electric motor is fixedly installed with a rotating column, and the rear end of the rotating column is fixedly installed with an atomizing nozzle.

[0008] Furthermore, the rear end of the disinfection box is symmetrically equipped with sliders, and the rear ends of the two sliders are fixedly equipped with racks. The two racks are meshed with gears. The base is fixedly equipped with a dual-axis motor. The two output shafts of the dual-axis motor are fixedly equipped with rotating columns. The two rotating columns are rotatably connected to the dialysis machine body. The two rotating columns are fixedly connected to two gears respectively.

[0009] Furthermore, a take-up roller is rotatably connected to the inside right side of the disinfection box. A rotating column three is fixedly installed at the left end of the take-up roller. A bevel gear one is fixedly installed at the left end of the rotating column three. A bevel gear two is meshed with the bevel gear one. A bevel gear three is fixedly installed on the outer surface of the rotating column one. A bevel gear four is meshed with the bevel gear three. A rotating column four is installed on both the bevel gear four and the bevel gear two. The rotating column four is rotatably connected to the disinfection box.

[0010] Furthermore, the output end of the pump body is fixedly connected to a second connecting pipe, which is rotatably connected to the take-up roller. The input end of the atomizing nozzle is fixedly connected to a first connecting pipe, the other end of which extends through the outside of the take-up roller to the inner middle of the take-up roller and is rotatably connected to the second connecting pipe. The other end of the first connecting pipe is fixedly connected to the take-up roller.

[0011] Furthermore, the power mechanism includes a sprocket one disposed on the outer surface of the rotating column two, a rotating column rotatably connected to the inner bottom side of the base, two L-shaped connecting plates symmetrically installed on both sides of the top of the rotating column, the top of the two L-shaped connecting plates being fixedly connected to the outer ring of the ratchet, a sprocket two fixedly installed on the outer surface of the rotating column, and a chain meshing with both the sprocket one and the sprocket two.

[0012] Furthermore, the dual-filtration dialysis fixation mechanism includes filter two, filter one, and a fixing frame one and a fixing frame two fixedly installed on the outer surface of the support column. A fixing block one is fixedly installed at the middle right side of filter two. A groove one is opened on the front side of fixing block one. A spring one is fixedly installed inside the groove one. A locking block one is fixedly installed at the front end of spring one. A fixing block two is fixedly installed at the middle right side of filter one. A locking groove two is opened on the front side of fixing block two.

[0013] Furthermore, both the first and second fixing frames are internally provided with cavities 1 and 2. Two arc-shaped clamping plates are symmetrically and rotatably installed inside each cavity 1 and cavity 2. A connecting plate is fixedly installed at the rear end of each of the two arc-shaped clamping plates. Rubber pads are provided on the sides of the two arc-shaped clamping plates that are close to each other. Springs 2 are fixedly installed inside each of the two cavities 2. Two connecting frames are symmetrically installed at the front end of each spring 2. Two transmission plates 1 are movably connected between the two connecting frames and the two connecting plates. A slot 1 is opened at the right rear end of the cavity 2 inside the first fixing frame. A slot 3 is opened at the right rear end of the cavity 2 inside the second fixing frame. A spring 4 is fixedly installed on the right side inside the slot 3. A locking block 2 is fixedly installed at the front end of the spring 4. The locking block 2 is slidably connected to the spring 4.

[0014] Further, the release mechanism includes a push plate slidably disposed inside the slot 1; a frame 1 is provided at the bottom of the fixing bracket 1; a button 1 is slidably connected inside the frame 1; a spring 5 is fixedly installed on the top of the button 1 and inside the frame 1; a push rod 1 is fixedly installed at the center of the top of the button 1; the spring 5 is located outside the push rod 1; a push rod 3 is fixedly installed on the top of the push rod 1; the push rod 3 is slidably connected to the fixing bracket 1; a push block 1 is fixedly installed on the top of the push rod 3; and a transmission plate 2 is rotatably connected between the push block 1 and the push plate 1. A push plate 2 is fixedly installed at the rear end of the card block 2. A frame 2 is fixedly installed at the bottom end of the fixed frame 2. A button 2 is slidably connected inside the frame 2. A spring 3 is fixedly installed at the top of the button 2 and inside the frame 2. A push rod 2 is fixedly installed at the center of the top of the button 2. The spring 3 is located outside the push rod 2. A push rod 4 is fixedly installed at the top of the push rod 2. The push rod 4 is slidably connected to the fixed frame 2. A push block 2 is fixedly installed at the top of the push rod 4. A transmission plate 3 is rotatably connected between the push block 2 and the push plate 2. The height of the push block 2 is higher than that of the push plate 2.

[0015] In summary, this application includes at least one of the following beneficial technical effects: 1. This solution adopts a two-stage progressive purification structure of two coarse filters and one fine filter. It can directly filter out substances of corresponding molecular weight ranges through the pore size of the semi-permeable membrane, comprehensively remove various small molecule toxins in the blood, and at the same time take into account the effective filtration of medium molecule toxins. Compared with single filter devices, the purification is more thorough and adaptable to different types of blood toxin removal needs. 2. This solution includes two mounting brackets, one and two, that are compatible with the dimensions of filter one and filter two. With the corresponding snap-fit ​​structure, it enables the correct installation of the coarse and fine filtration units, avoiding disruption of the purification process due to reversed filter installation, and improving the safety and ease of operation of the device. 3. This solution places the vascular interface in the mounting slot inside the dialysis machine body. With the automatic closing structure of the protective cover, the blood passage is not directly exposed to the external environment. This structurally eliminates the risk of interface contamination due to bacterial contact. It eliminates the need for manual cleaning, disinfection, and sealing, and completely avoids the infection risks caused by exposed interfaces in existing technologies. At the same time, the integrated disinfection mechanism can assist in cleaning the interface, ensuring safe use. 4. The dual-filter dialysis fixing mechanism of this solution adopts a combination of arc-shaped clamping plate and rubber pad. It achieves quick fixing of the filter through spring-driven clamping structure, and avoids filter slippage or damage to the outer shell by taking advantage of the anti-slip and cushioning properties of the rubber pad. At the same time, it is equipped with a release mechanism, which can complete the filter disassembly by simply pressing a button, making the operation efficient and labor-saving. 5. The vascular interface disinfection mechanism of this solution is equipped with a connecting pipe winding roller, which works in conjunction with a bevel gear linkage structure to simultaneously wind up the connecting pipe when the atomizing nozzle rotates for disinfection, preventing the connecting pipe from tangling and clogging the nozzle, and ensuring the stability and uniformity of the disinfection process. 6. The rotating shaft and ratchet of this solution adopt a one-way ratchet transmission structure. When the cover is opened manually, the power mechanism will not be linked. When the power mechanism closes the cover after disinfection, it can also stably transmit torque, realizing that manual operation and automatic linkage do not interfere with each other, and improving the operational flexibility of the device.

[0016] This invention employs a dual-stage purification structure of coarse filtration and fine filtration to simultaneously remove small and medium-sized molecule toxins. The vascular interface is located in the mounting slot inside the dialysis machine body, and with the automatic closing structure of the protective cover, the blood passage is completely isolated from the external environment when not in use, eliminating bacterial adhesion at the source. At the same time, the integrated disinfection mechanism can precisely clean the inner wall of the interface and the cannula contact end, further ensuring safety and completely avoiding the risk of interface contamination caused by exposed interfaces in existing technologies. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the left side of a dual-filtration blood purification dialysis device proposed in this invention; Figure 2 This is a schematic diagram of the right side of a dual-filtration blood purification dialysis device proposed in this invention; Figure 3 This is a schematic cross-sectional view of the disinfection box structure of a dual-filtration blood purification dialysis device proposed in this invention; Figure 4 This is a bottom view of the structure of a dual-filtration blood purification dialysis device proposed in this invention; Figure 5 This is a schematic diagram of the winding roller structure of a dual-filtration blood purification dialysis device proposed in this invention; Figure 6 This is a schematic diagram of the connecting pipe one and connecting pipe two of a dual-filtration blood purification dialysis device proposed in this invention; Figure 7 This is a schematic diagram of the fixing frame of a dual-filtration blood purification dialysis device proposed in this invention; Figure 8 This is a schematic diagram of the filter two structure of a dual-filtration blood purification dialysis device proposed in this invention; Figure 9 This is a schematic diagram of the fixing frame structure of a dual-filtration blood purification dialysis device proposed in this invention; Figure 10 This is a schematic diagram of the filter structure of a dual-filtration blood purification dialysis device proposed in this invention; Figure 11This is a schematic diagram of the release mechanism of filter two in a dual-filtration blood purification dialysis device proposed in this invention; Figure 12 This is a schematic diagram of the release mechanism of filter one in a dual-filtration blood purification dialysis device proposed in this invention; Figure 13 This invention proposes a dual-filtration blood purification dialysis device. Figure 2 Enlarged structural diagram of section A; Figure 14 This invention proposes a dual-filtration blood purification dialysis device. Figure 3 Enlarged structural diagram of section B; Figure 15 This invention proposes a dual-filtration blood purification dialysis device. Figure 14 Enlarged structural diagram of section C; Figure 16 This invention proposes a dual-filtration blood purification dialysis device. Figure 4 Enlarged structural diagram of section D in the middle; Figure 17 This invention proposes a dual-filtration blood purification dialysis device. Figure 16 Enlarged structural diagram of section E in the middle; Figure 18 This invention proposes a dual-filtration blood purification dialysis device. Figure 16 Enlarged structural diagram of section F in the middle; Figure 19 This invention proposes a dual-filtration blood purification dialysis device. Figure 7 Enlarged structural diagram of the G section; Figure 20 This invention proposes a dual-filtration blood purification dialysis device. Figure 9 Enlarged structural diagram of section H in the middle.

[0018] Reference numerals: 1. Base; 2. Casters; 3. Frame; 4. Dialysis machine body; 5. Display screen; 6. Air trap; 7. Bubble detector; 8. Tubing bracket; 9. Blood pump; 10. Tubing clamp; 11. Mounting slot; 12. Arterial interface; 13. Venous interface; 14. Connecting block; 15. Support column; 16. Frame; 17. Cover; 18. Rotating shaft; 19. Handle; 20. Ratchet; 21. L-shaped connecting plate; 22. Rotating column; 23. Sterilization box; 24. Box body; 25. Pump body; 26. Motor; 27. Rotating column one; 28. Rack; 29. ​​Gear; 30. Rotating column two; 31. Rewinding roller; 32. Rotating column three; 33. Bevel gear one; 34. Bevel gear two; 35. Rotating column four; 36. Bevel gear three; 37. Bevel gear four; 38. Connecting 39. Pipe 1; 40. Connecting Pipe 2; 41. Sprocket 1; 42. Sprocket 2; 43. Chain; 44. Fixing Frame 1; 45. Fixing Frame 2; 46. Arc-shaped Clamping Plate; 47. Rubber Pad; 48. Cavity 1; 49. Cavity 2; 50. Spring 2; 51. Slot 1; 52. Filter 2; 53. Fixing Block 1; 54. Clamping Block 1; 55. Connecting Plate; 56. Transmission Plate 1; 57. Filter 1; 58. Fixing block 2; 59. Slot 2; 60. Slot 3; 61. Spring 4; 62. Slot 2; 63. Push plate 1; 64. Frame 1; 65. Button 1; 66. Spring 5; 67. Push rod 1; 68. Push rod 3; 69. Push block 1; 70. Transmission plate 2; 71. Frame 2; 72. Push rod 4; 73. Push block 2; 74. Transmission plate 3; 75. Push plate 2. Detailed Implementation

[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0020] Example 1 Reference Figures 1-20 A dual-filtration blood purification dialysis device includes: a base 1, with casters 2 at each of the four corners of the base 1; a frame 3 fixedly mounted on the top of the base 1; a dialysis machine body 4 fixedly mounted on the top of the frame 3; a display screen 5 fixedly mounted on the top of the dialysis machine body 4; two air traps 6, a bubble detector 7, a tubing fixing bracket 8, a blood pump 9, and a tubing fixing clamp 10 arranged on the front side of the dialysis machine body 4; and further includes: The mounting slot 11 is located on the lower left side of the front part of the dialysis machine body 4. An arterial blood vessel interface 12 and a venous blood vessel interface 13 are provided on the rear side of the mounting slot 11. The bracket connecting block 14 is fixedly installed on the left side of the dialysis machine body 4. The top of the dialysis machine body 4 is fixedly installed with a support column 15. The top of the support column 15 is fixedly installed with a frame 16, which is used to suspend the water that needs to be hung. The vascular interface protection mechanism is located inside the mounting slot 11 and is used to cover and block the arterial vascular interface 12 and the venous vascular interface 13 to prevent bacteria from falling into the arterial vascular interface 12 and the venous vascular interface 13 after disinfection. The vascular interface disinfection mechanism is located on the front side of the dialysis machine body 4 and is used to disinfect the arterial vascular interface 12 and the venous vascular interface 13. The power mechanism, located inside the mounting slot 11, is used to automatically seal the arterial blood vessel interface 12 and the venous blood vessel interface 13 after disinfection. The dual-filtration dialysis fixing mechanism is set on the support column 15 to fix filter 2 51 and filter 1 57 respectively, and to prevent filter 2 51 and filter 1 57 from being installed incorrectly. Filter 2 51 and filter 1 57 are both disposable. The disassembly mechanism, located on the dual-filter fixing mechanism, is used to easily disassemble filter 2 51 and filter 1 57, adapting to the clinical need for one-person-one-use-one-replacement.

[0021] Reference Figure 1 , Figure 2 , Figure 13 , Figure 16 and Figure 17 The vascular interface protection mechanism includes two annular protective covers respectively disposed around the arterial vascular interface 12 and the venous vascular interface 13. A cover 17 is rotatably connected to the right side of each of the two annular protective covers. A rotating shaft 18 is connected to the right side of both covers 17. The rotating shaft 18 is rotatably connected to the mounting groove 11. The rotating shaft 18 is made of medical-grade hard plastic and is rotatably connected to the inner wall of the mounting groove 11 via a sealed bearing. A handle 19 is installed on the front side of each cover 17, allowing the two covers to be opened and closed. When the body 17 is opened, blood vessels can be connected to the arterial blood vessel interface 12 and the venous blood vessel interface 13 respectively. The bottom end of the rotating shaft 18 extends through the bottom of the mounting groove 11 into the interior of the dialysis machine body 4. A ratchet 20 is fixedly installed at the bottom end of the rotating shaft 18. The inner ring of the ratchet 20 is fixedly connected to the rotating shaft 18. The ratchet 20 has a one-way ratchet structure with evenly distributed oblique ratchet teeth on its outer ring. The inner ring is fixed with the bottom end of the rotating shaft 18 by interference fit. It can only transmit torque in the direction of closing the cover 17. It will not drive the linkage when rotating in the opposite direction.

[0022] Reference Figure 2 , Figure 3 , Figure 5 , Figure 6 , Figure 14 and Figure 15The vascular interface disinfection mechanism includes a disinfection box 23 slidably disposed on the front side of the dialysis machine body 4. A box body 24 is disposed on the front side of the interior of the disinfection box 23. A pump body 25 is disposed inside the box body 24. A motor 26 is fixedly installed on the rear side of the box body 24. A rotating column 27 is fixedly installed at the output end of the motor 26. An atomizing nozzle is fixedly installed at the rear end of the rotating column 27. Slider blocks are symmetrically installed at the rear end of the disinfection box 23. Both sliders are slidably connected to the dialysis machine body 4. A rack 28 is fixedly installed at the rear end of each slider. Both racks 28 are meshed with gears 29. A dual-axis motor is fixedly installed inside the base 1. Rotary columns 30 are fixedly installed on both output shafts of the dual-axis motor. Both rotary columns 30 are rotatably connected to the dialysis machine body 4. The two rotary columns 30 are fixedly connected to the two gears 29 respectively. A winding roller 31 is rotatably connected to the right side inside the sterilization box 23. A rotating column 32 is fixedly installed on the left end of the winding roller 31. A bevel gear 33 is fixedly installed on the left end of the rotating column 32. The bevel gear 33 meshes with a bevel gear 39. 4. A bevel gear 36 is fixedly installed on the outer surface of the rotating column 27. The bevel gear 36 meshes with a bevel gear 37. A rotating column 35 is installed on both the bevel gear 37 and the bevel gear 24. The rotating column 35 is rotatably connected to the disinfection box 23. A connecting pipe 39 is fixedly connected to the output end of the pump body 25. The connecting pipe 39 is rotatably connected to the take-up roller 31. A connecting pipe 38 is fixedly connected to the input end of the atomizing nozzle. The other end of the connecting pipe 38 extends through the outside of the take-up roller 31 to the middle of the inside of the take-up roller 31. It is rotatably connected to connecting pipe 2 39, and the other end of connecting pipe 1 38 is fixedly connected to take-up roller 31. When the atomizing nozzle rotates for disinfection, the take-up roller 31 rotates simultaneously through bevel gear linkage. Since connecting pipe 1 38 is fixedly connected to take-up roller 31 and rotatably connected to connecting pipe 2 39, the take-up roller 31 can wrap connecting pipe 1 38 around the surface of take-up roller 31 when it rotates, preventing the long connecting pipe 1 38 from wrapping around the surface of the atomizing nozzle, preventing connecting pipe 1 38 from clogging the atomizing nozzle, and improving the disinfection effect.

[0023] Reference Figure 4 , Figure 16 , Figure 17 and Figure 18The power mechanism includes a sprocket 40 mounted on the outer surface of the rotating column 30. A rotating column 22 is rotatably connected to the inner bottom side of the base 1. Two L-shaped connecting plates 21 are symmetrically installed on both sides of the top of the rotating column 22. The tops of the two L-shaped connecting plates 21 are fixedly connected to the outer ring of the ratchet 20. A sprocket 41 is fixedly mounted on the outer surface of the rotating column 22. A chain 42 is meshed on both the sprocket 40 and the sprocket 41. Due to the ratchet 20, when the disinfection box 23 has finished disinfecting, it can move to the left and pass through the rotating column 30. The sprocket 40, chain 42, sprocket 41, and rotating column 22 drive the ratchet 20 to rotate, which in turn drives the L-shaped connecting plate 21, ratchet 20, and rotating shaft 18 to rotate, thus closing the two covers 17 to prevent bacteria from entering. When the device needs to be used and blood vessels are inserted into the arterial blood vessel interface 12 and the venous blood vessel interface 13 respectively, the cover 17 can be rotated and opened by manually pulling the handle 19. At this time, due to the ratchet 20, the rotating column 22 will not rotate and will not affect the movement of the disinfection box 23.

[0024] Reference Figure 3 , Figures 7-10 , Figure 19 and 20The dual-filtration dialysis fixation mechanism includes a second filter 51, a first filter 57, and a first fixation frame 43 and a second fixation frame 44 fixedly installed on the outer surface of the support column 15. A first fixation block 52 is fixedly installed at the middle right side of the second filter 51. A groove 1 is formed on the front side of the first fixation block 52. A first spring 1 is fixedly installed inside the groove 1. A first locking block 53 is fixedly installed at the front end of the first spring. A second fixation block 58 is fixedly installed at the middle right side of the first filter 57. A second locking groove 59 is formed on the front side of the second fixation block 58. Both the first fixation frame 43 and the second fixation frame 44 have a first cavity 47 and a second cavity 48 inside. Two arc-shaped clamping plates 45 are symmetrically rotated inside the first cavity 47 and the second cavity 48. A connecting plate 54 is fixedly installed at the rear end of each of the two arc-shaped clamping plates 45. A rubber pad 46 is provided on the side of each of the two arc-shaped clamping plates 45 that is close to each other. The rubber pad 46 is made of medical-grade silicone and is flush with the inner wall of the arc-shaped clamping plate 45. The matching arc shape has a fine anti-slip texture on the surface; it can increase the friction with the outer walls of filter 2 51 and filter 1 57, prevent filter 2 51 and filter 1 57 from sliding and shifting, and at the same time buffer the clamping force to prevent damage to the plastic shell of the filter. Spring 2 49 is fixedly installed inside the two cavities 2 48. The front end of spring 2 49 is slidably connected to cavity 2 48, and the rear end of spring 2 49 is fixedly connected to cavity 2 48. Two connecting brackets 55 are symmetrically installed at the front end of spring 2 49. Two transmission plates 1 56 are movably connected between the two connecting brackets 55 and the two connecting plates 54. The right rear end of cavity 2 48 inside fixed bracket 1 43 has a slot 1 50. The right rear end of cavity 2 48 inside fixed bracket 2 44 has a slot 3 60. Spring 4 61 is fixedly installed on the right side inside slot 3 60. A locking block 2 62 is fixedly installed at the front end of spring 4 61. The locking block 2 62 is slidably connected to spring 4 61.

[0025] Reference Figure 8 Filter 2, 51, is a coarse filter. It has a blood inlet at the top to receive the raw blood to be purified, a blood outlet at the bottom, and a waste liquid outlet on the side wall. Its core function is to initially filter out medium-molecular impurities in the blood.

[0026] Reference Figure 10 Filter 1 57 is a fine filter with a blood inlet at the top, which is connected to the blood outlet of filter 2 51. It has a waste liquid outlet on the side wall and a blood outlet at the bottom, outputting the final purified blood after double filtration. It also has a dialysate inlet on the side wall. Its core function is to filter out small molecule toxins in the blood, and at the same time, it further optimizes the purification effect by replacing the dialysate.

[0027] Reference Figure 11 and Figure 12The release mechanism includes a push plate 63 slidably disposed inside the slot 50; a frame 64 is disposed at the bottom of the fixing bracket 43; a button 65 is slidably connected inside the frame 64; a spring 66 is fixedly installed on the top of the button 65 and inside the frame 64; a push rod 67 is fixedly installed at the center of the top of the button 65; the spring 66 is located outside the push rod 67; a push rod 68 is fixedly installed on the top of the push rod 67; the push rod 68 is slidably connected to the fixing bracket 43; a push block 69 is fixedly installed on the top of the push rod 68; and a transmission plate 2 is rotatably connected between the push block 69 and the push plate 63. 70. A push plate 75 is fixedly installed at the rear end of the second card block 62. A frame 71 is fixedly installed at the bottom end of the second fixed bracket 44. A button 2 is slidably connected inside the frame 71. A spring 3 is fixedly installed at the top of the button 2 and inside the frame 71. A push rod 2 is fixedly installed at the center of the top of the button 2. The spring 3 is located outside the push rod 2. A push rod 72 is fixedly installed at the top of the push rod 2. The push rod 72 is slidably connected to the second fixed bracket 44. A push block 73 is fixedly installed at the top of the push rod 72. A transmission plate 74 is rotatably connected between the push block 73 and the push plate 75. The height of the push block 73 is higher than that of the push plate 75.

[0028] The implementation principle of the dual-filtration blood purification dialysis device in this application embodiment is as follows: When in use, the filter 2 51 is first installed by inserting the fixing block 1 52 into the cavity 2 48 opened on the front side of the fixing frame 1 43, and then continuously applying force, so that the fixing block 1 52 pushes the spring 2 49, so that the two connecting frames 55 push the two connecting plates 54 away from each other through the two transmission plates 1 56, so that the two arc-shaped clamping plates 45 rotatably set inside the cavity 1 47 come closer to each other, so that the periphery of the filter 2 51 can be wrapped and fixed. With continuous force, the locking block 1 53 can be locked into the inside of the locking slot 1 50, and at this time the filter 2 51 is fixed. Then, when installing filter 57, by inserting fixing block 58 into cavity 48 opened on the front side of fixing frame 44, and then continuously applying force, fixing block 58 pushes spring 49, causing two connecting frames 55 to push two connecting plates 54 away from each other through two transmission plates 56, and causing two arc-shaped clamping plates 45 rotatably set inside cavity 47 to come closer to each other, thus wrapping and fixing the periphery of filter 57. By continuously pushing, locking block 62 can be locked into slot 59. At this time, filter 57 is fixed. Fixing frame 43 and fixing frame 44 are respectively adapted to filter 51 and filter 57, which can avoid confusion in the installation positions of coarse and fine filter units. By employing a two-stage cascade filtration system combined with precise replacement fluid exchange, small and medium-molecular-weight toxins in the blood are removed in stages. Simultaneously, replacement fluid is replenished to maintain the patient's blood volume and electrolyte balance. The entire process follows the workflow of "blood extraction, primary filtration, secondary filtration, replacement fluid mixing, purified blood reinfusion, and waste fluid collection." Each system works in concert to complete blood purification. The specific working principle is explained step-by-step as follows: Manually pull handle 19 to open the two covers 17 inside the mounting slot 11, causing the rotating shaft 18 to rotate. Because the ratchet 20 has a one-way ratchet structure, reverse rotation will not trigger the power mechanism. After opening the two covers 17, arterial and venous blood vessels can be connected to the arterial blood vessel interface 12 and venous blood vessel interface 13 inside the mounting slot 11, respectively. Then, start the blood pump 9 on the front of the dialysis machine body 4. The blood pump 9 provides power to drive the blood flow in the tubing, smoothly drawing the raw blood to be purified from the patient's body through the arterial blood vessel interface 12 to the device's dialysis unit. In the filtration pipeline, the pipeline is fixed and limited by the pipeline fixing bracket 8 and the pipeline fixing clamp 10 to prevent the pipeline from shifting or bending and affecting blood flow. The blood to be purified is led out through the arterial blood vessel interface 12 and connected to the blood inlet at the top of the filter 2 51 through the pipeline. The filter 2 51 is a coarse filter. The blood completes the first-stage coarse filtration treatment inside the filter 2 51, accurately filtering out medium-molecular impurities in the blood and achieving the initial removal of medium-molecular pollutants in the blood. The blood after coarse filtration flows out from the blood outlet at the bottom of the filter 2 51 and enters the next filtration stage. Connect the blood outlet at the bottom of filter 2 51 to the blood inlet at the top of filter 1 57. Filter 1 57 is a fine filter. After coarse filtration, the blood enters the interior of filter 1 57 to undergo secondary fine filtration, accurately filtering out small molecule toxins in the blood that are difficult to remove by conventional dialysis. At the same time, fresh dialysis fluid is continuously introduced into the dialysis fluid inlet on the side wall of filter 1 57. During the secondary fine filtration process of filter 57, the fresh dialysate introduced through the dialysate inlet on the side wall of filter 57 is fully mixed with the blood that has completed the filtration of small molecule toxins in filter 57. Through the replenishment of substances by the dialysate, the patient's blood volume is kept stable, while the electrolyte and acid-base balance in the blood is precisely regulated to make up for the loss of substances in the blood during the filtration process. This ensures that the physiological indicators of the purified blood meet the reinfusion requirements and achieves precise matching and fusion between the replacement fluid and the purified blood. After the replacement fluid has been mixed, the final purified blood flows out from the blood outlet at the bottom of filter 57 and is transported through the dialysis tubing to the venous interface 13 in the mounting tank 11. The tubing passes through the bubble detector 7 and the air trap 6 on the front side of the dialysis machine body 4. The bubble detector 7 detects the presence of air bubbles in the tubing in real time, and the air trap 6 captures and removes the air in the tubing in a timely manner to prevent air bubbles from entering the patient's body and causing safety risks. Finally, the purified blood is connected to the patient's venous end via the venous interface 13 and is successfully reinfused into the patient's body, completing the blood purification and reinfusion process. Throughout the dual-filtration purification process, after filter 2 51 completes the first-stage coarse filtration, the filtered medium-molecular impurities are discharged through the waste liquid outlet on its side wall, forming coarse filtration waste liquid; after filter 1 57 completes the second-stage fine filtration and merges with the replacement fluid, it completes the material exchange with the blood, and the waste dialysate containing small-molecule toxins is discharged through the waste liquid outlet; the above two types of waste liquids are collected through their respective waste liquid outlets and are uniformly collected, temporarily stored and subsequently processed by the dialysis machine body 4, realizing closed-loop collection of waste liquid during the purification process and avoiding waste liquid leakage or pollution; After use, remove the vein and artery vessels, then start the dual-axis motor. The two output shafts of the dual-axis motor drive the two rotating columns 30 to rotate, and the two rotating columns 30 drive the two take-up rollers 31 to rotate. This causes the two gears 29 to rotate simultaneously, driving the two racks 28 to move to the right. At the same time, the two sliders drive the disinfection box 23 and the internal components of the disinfection box 23 to move to the right, so that it is completely in front of the mounting slot 11. Then start the pump body 25 and the motor 26. The pump body 25 transmits the disinfectant to the atomizing nozzle through the connecting pipe 39 and the connecting pipe 38. At the same time, the output shaft of the motor 26 drives the rotating column 27 and the atomizing nozzle to rotate, evenly spraying the disinfectant inside the mounting slot 11, evenly disinfecting the artery vessel interface 12, the vein vessel interface 13 and the cover 17. After disinfection, the dual-axis motor is activated, simultaneously rotating the two rotating columns 30 and the two gears 29. This causes the disinfection box 23 to move to the left and return to its original position. Simultaneously, one of the rotating columns 30 drives the sprocket 40 to rotate, which in turn drives the sprocket 41 via the chain 42. The sprocket 41 then drives the rotating column 22, which in turn drives the two L-shaped connecting plates 21. This causes the ratchet 20 to drive the rotating shaft 18, simultaneously closing the two covers 17. This structurally eliminates the infection risk caused by exposed interfaces, simplifies clinical procedures, improves work efficiency, and prevents environmental bacteria from adhering at the source. When idle, the interface is completely isolated from the external contaminated environment, eliminating the possibility of environmental bacteria adhering at the source. The covers are only briefly opened during cannulation, and the automatic disinfection mechanism precisely cleans the inner wall of the interface and the cannula contact end, requiring no manual intervention throughout the process. When disassembling filter 2 51, by manually pressing button 1 65, push rod 1 67, push rod 3 68 and push block 1 69 can be pushed upward. Through transmission plate 2 70, push plate 1 63 can be pushed to push block 1 53 out of slot 1 50. After being pushed out, spring 2 49 in fixing bracket 1 43 will continuously rebound, pushing fixing block 1 52 away from the inside of cavity 2 48, so that the two rubber pads 46 can move away from each other, and filter 2 51 can be disassembled. When it is necessary to disassemble filter 57, by manually pressing button 2, push rod 2, push rod 4 72 and push block 2 73 can be pushed upward. By pushing transmission plate 3 74, push plate 2 75 can be pulled to the rear, so that the locking block 2 62 can be returned to the locking slot 3 60, and filter 57 can be disassembled.

[0029] Example 2 The difference between this embodiment and embodiment one is that a hydraulic cylinder is set at the bottom center of the base 1, and an anti-slip plate is fixedly installed at the output end of the hydraulic cylinder. By activating the hydraulic cylinder, the output end of the hydraulic cylinder drives the anti-slip plate to contact the ground, which can improve the overall stability of the device.

[0030] The above description is only 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 dual-filtration blood purification dialysis device, comprising a base (1), wherein casters (2) are provided at the four corners of the bottom of the base (1), a frame (3) is fixedly installed on the top of the base (1), a dialysis machine body (4) is fixedly installed on the top of the frame (3), a display screen (5) is fixedly installed on the top of the dialysis machine body (4), and two air traps (6), a bubble detector (7), a tubing fixing bracket (8), a blood pump (9), and a tubing fixing clamp (10) are provided on the front side of the dialysis machine body (4), characterized in that: Also includes: The mounting slot (11) is located on the lower left side of the front part of the dialysis machine body (4). The arterial blood vessel interface (12) and the venous blood vessel interface (13) are provided on the rear side of the inside of the mounting slot (11). A bracket connecting block (14) is fixedly installed on the left side of the dialysis machine body (4). A support column (15) is fixedly installed on the top of the dialysis machine body (4), and a frame (16) is fixedly installed on the top of the support column (15). The vascular interface protection mechanism is located inside the mounting slot (11) and is used to cover and block the arterial vascular interface (12) and the venous vascular interface (13); The vascular interface disinfection mechanism is located on the front side of the dialysis machine body (4) and is used to disinfect the arterial vascular interface (12) and the venous vascular interface (13). The power mechanism is located inside the mounting slot (11) and is used to automatically seal the arterial blood vessel interface (12) and the venous blood vessel interface (13) after disinfection. A dual-filtration dialysis fixation mechanism is mounted on a support column (15); The release mechanism is located on the dual-filter fixing mechanism.

2. The dual-filtration blood purification dialysis device according to claim 1, characterized in that: The vascular interface protection mechanism includes two annular protective covers respectively disposed around the arterial vascular interface (12) and the venous vascular interface (13). The right side of each of the two annular protective covers is rotatably connected to a cover (17). The right side of the two covers (17) is connected to a rotating shaft (18). The rotating shaft (18) is rotatably connected to the mounting groove (11). The front side of each of the two covers (17) is equipped with a handle (19). The bottom end of the rotating shaft (18) extends through the bottom of the mounting groove (11) into the interior of the dialysis machine body (4). A ratchet (20) is fixedly installed at the bottom end of the rotating shaft (18).

3. The dual-filtration blood purification dialysis device according to claim 2, characterized in that: The vascular interface disinfection mechanism includes a disinfection box (23) that is slidably disposed on the front side of the dialysis machine body (4). The front side of the disinfection box (23) is provided with a box body (24). The inside of the box body (24) is provided with a pump body (25). The rear side of the box body (24) is fixedly installed with an electric motor (26). The output end of the electric motor (26) is fixedly installed with a rotating column (27). The rear end of the rotating column (27) is fixedly installed with an atomizing nozzle.

4. The dual-filtration blood purification dialysis device according to claim 3, characterized in that: The disinfection box (23) is symmetrically equipped with sliders at its rear end. Both sliders are fixedly equipped with racks (28) at their rear ends. Both racks (28) are meshed with gears (29). A dual-axis motor is fixedly installed inside the base (1). Both output shafts of the dual-axis motor are fixedly equipped with rotating columns (30). Both rotating columns (30) are rotatably connected to the dialysis machine body (4). Both rotating columns (30) are fixedly connected to the two gears (29) respectively.

5. The dual-filtration blood purification dialysis device according to claim 4, characterized in that: The inside right side of the disinfection box (23) is rotatably connected to a take-up roller (31). A rotating column three (32) is fixedly installed on the left end of the take-up roller (31). A bevel gear one (33) is fixedly installed on the left end of the rotating column three (32). A bevel gear two (34) is meshed with the bevel gear one (33). A bevel gear three (36) is fixedly installed on the outer surface of the rotating column one (27). A bevel gear four (37) is meshed with the bevel gear two (34). A rotating column four (35) is installed on both the bevel gear four (37) and the bevel gear two (34). The rotating column four (35) is rotatably connected to the disinfection box (23).

6. The dual-filtration blood purification dialysis device according to claim 5, characterized in that: The output end of the pump body (25) is fixedly connected to a second connecting pipe (39), which is rotatably connected to the take-up roller (31). The input end of the atomizing nozzle is fixedly connected to a first connecting pipe (38). The other end of the first connecting pipe (38) extends through the outside of the take-up roller (31) to the middle of the inside of the take-up roller (31) and is rotatably connected to the second connecting pipe (39). The other end of the first connecting pipe (38) is fixedly connected to the take-up roller (31).

7. The dual-filtration blood purification dialysis device according to claim 6, characterized in that: The power mechanism includes a sprocket (40) disposed on the outer surface of the rotating column (30). A rotating column (22) is rotatably connected to the inner bottom side of the base (1). Two L-shaped connecting plates (21) are symmetrically installed on both sides of the top of the rotating column (22). The top of the two L-shaped connecting plates (21) is fixedly connected to the outer ring of the ratchet (20). A sprocket (41) is fixedly installed on the outer surface of the rotating column (22). A chain (42) is meshed on both the sprocket (40) and the sprocket (41).

8. The dual-filtration blood purification dialysis device according to claim 1, characterized in that: The dual-filtration dialysis fixation mechanism includes filter two (51), filter one (57), and a fixation frame one (43) and a fixation frame two (44) fixedly installed on the outer surface of the support column (15). A fixing block one (52) is fixedly installed at the middle right side of filter two (51). A groove one is opened on the front side of the fixing block one (52). A spring one is fixedly installed inside the groove one. A locking block one (53) is fixedly installed at the front end of the spring one. A fixing block two (58) is fixedly installed at the middle right side of filter one (57). A locking groove two (59) is opened on the front side of the fixing block two (58).

9. The dual-filtration blood purification dialysis device according to claim 8, characterized in that: Both the first (43) and the second (44) of the fixing frame are provided with a cavity first (47) and a cavity second (48). Two arc-shaped clamping plates (45) are symmetrically and rotatably installed inside each cavity first (47) and cavity second (48). A connecting plate (54) is fixedly installed at the rear end of each of the two arc-shaped clamping plates (45). A rubber pad (46) is provided on the side of each of the two arc-shaped clamping plates (45) that is close to each other. A spring second (49) is fixedly installed inside each of the two cavities second (48). Two springs are symmetrically installed at the front end of each spring second (49). Two connecting frames (55) are movably connected to two connecting plates (54) by two transmission plates (56). The right rear end of the inner cavity (48) of the fixed frame (43) is provided with a slot (50). The right rear end of the inner cavity (48) of the fixed frame (44) is provided with a slot (60). The right side of the inner cavity (48) of the fixed frame (44) is fixedly installed with a spring (61). The front end of the spring (61) is fixedly installed with a block (62). The block (62) and the spring (61) are slidably connected. The release mechanism includes a push plate (63) slidably disposed inside the slot (50), a frame (64) at the bottom of the fixing frame (43), a button (65) slidably connected inside the frame (64), a spring (66) fixedly installed at the top of the button (65) and inside the frame (64), a push rod (67) fixedly installed at the center of the top of the button (65), the spring (66) located outside the push rod (67), a push rod (68) fixedly installed at the top of the push rod (67), the push rod (68) slidably connected to the fixing frame (43), a push block (69) fixedly installed at the top of the push rod (68), and a transmission mechanism rotatably connected between the push block (69) and the push plate (63). The moving plate 2 (70) has a push plate 2 (75) fixedly installed at the rear end of the locking block 2 (62). The bottom end of the fixing frame 2 (44) has a frame 2 (71) fixedly installed. The inside of the frame 2 (71) is slidably connected to a button 2. The top of the button 2 is fixedly installed with a spring 3 inside the frame 2 (71). The top center of the top of the button 2 is fixedly installed with a push rod 2. The spring 3 is located outside the push rod 2. The top of the push rod 2 is fixedly installed with a push rod 4 (72). The push rod 4 (72) is slidably connected with the fixing frame 2 (44). The top of the push rod 4 (72) is fixedly installed with a push block 2 (73). The push block 2 (73) is rotatably connected with the push plate 2 (75). The height of the push block 2 (73) is higher than that of the push plate 2 (75).

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