CN113941040B - Extracorporeal circulation pipeline for purifying blood - Google Patents
Extracorporeal circulation pipeline for purifying blood Download PDFInfo
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- CN113941040B CN113941040B CN202111327915.XA CN202111327915A CN113941040B CN 113941040 B CN113941040 B CN 113941040B CN 202111327915 A CN202111327915 A CN 202111327915A CN 113941040 B CN113941040 B CN 113941040B
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
- A61M1/14—Dialysis systems; Artificial kidneys; Blood oxygenators ; Reciprocating systems for treatment of body fluids, e.g. single needle systems for hemofiltration or pheresis
- A61M1/16—Dialysis systems; Artificial kidneys; Blood oxygenators ; Reciprocating systems for treatment of body fluids, e.g. single needle systems for hemofiltration or pheresis with membranes
- A61M1/1621—Constructional aspects thereof
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
- A61M1/36—Other treatment of blood in a by-pass of the natural circulatory system, e.g. temperature adaptation, irradiation ; Extra-corporeal blood circuits
- A61M1/3621—Extra-corporeal blood circuits
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
- A61M1/36—Other treatment of blood in a by-pass of the natural circulatory system, e.g. temperature adaptation, irradiation ; Extra-corporeal blood circuits
- A61M1/3621—Extra-corporeal blood circuits
- A61M1/3653—Interfaces between patient blood circulation and extra-corporal blood circuit
- A61M1/3659—Cannulae pertaining to extracorporeal circulation
- A61M1/3661—Cannulae pertaining to extracorporeal circulation for haemodialysis
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
- A61M1/36—Other treatment of blood in a by-pass of the natural circulatory system, e.g. temperature adaptation, irradiation ; Extra-corporeal blood circuits
- A61M1/3672—Means preventing coagulation
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
- A61M1/36—Other treatment of blood in a by-pass of the natural circulatory system, e.g. temperature adaptation, irradiation ; Extra-corporeal blood circuits
- A61M1/3692—Washing or rinsing blood or blood constituents
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
- A61M1/36—Other treatment of blood in a by-pass of the natural circulatory system, e.g. temperature adaptation, irradiation ; Extra-corporeal blood circuits
- A61M1/3693—Other treatment of blood in a by-pass of the natural circulatory system, e.g. temperature adaptation, irradiation ; Extra-corporeal blood circuits using separation based on different densities of components, e.g. centrifuging
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M2202/00—Special media to be introduced, removed or treated
- A61M2202/04—Liquids
- A61M2202/0413—Blood
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M2205/00—General characteristics of the apparatus
- A61M2205/33—Controlling, regulating or measuring
- A61M2205/3331—Pressure; Flow
- A61M2205/3334—Measuring or controlling the flow rate
Abstract
The invention discloses an extracorporeal circulation pipeline for purifying blood, which comprises a main box body, wherein a filter screen component for filtering viscous blood is arranged in the main box body, and a speed measuring component for detecting the flow rate of the blood is arranged on the right side of the filter screen component; according to the invention, the blood is filtered through the filter screen, so that the coagulated blood can be filtered out and moved forwards or backwards to the right side of the corresponding conical cavity, the coagulated blood on the filter screen is pumped and washed by the water pump at the corresponding side, so that the filter function is recovered, the clean filter screen is positioned in the through cavity, the filtering operation is performed, the coagulated blood is prevented from blocking a dialysis pipeline to the greatest extent, and the blood flow rate is detected through the impeller, so that the concentration of the blood is judged, and the heparin addition in the heparin storage cavity is controlled by controlling the gap between the left end face of the blocking block and the left side wall of the heparin through cavity, so that the heparin addition is reduced as much as possible under the condition that the blood is not coagulated, and the influence of heparin on the body of a patient is reduced to the greatest extent.
Description
Technical Field
The invention relates to the technical field related to blood purification equipment, in particular to an extracorporeal circulation pipeline for blood purification.
Background
Blood purification is also known as dialysis in daily life. The meaning of the method is as follows: the blood of the patient is led out of the body and passed through a purifying device to remove some pathogenic substances and purify the blood, so as to achieve the goal of curing diseases.
The current hemodialysis equipment needs to add heparin in the dialysis process to prevent blood coagulation, and because the blood components of each person are different, the added heparin amount is different, if the heparin amount is too small, the blood coagulation can occur during dialysis to cause dialysis pipeline blockage, the dialysis process is influenced, even the physical health of a patient is jeopardized, if the heparin is excessively added, protamine needs to be injected to neutralize the heparin after the dialysis treatment is finished, the health of the patient is not benefited, and the dialysis cost is increased.
Disclosure of Invention
The present invention aims to provide an extracorporeal circulation circuit for purifying blood, which is used for overcoming the defects in the prior art.
The extracorporeal circulation pipeline for purifying blood comprises a main box body, wherein a filter screen component for filtering viscous blood is arranged in the main box body, and a speed measuring component for detecting the flow rate of the blood is arranged on the right side of the filter screen component;
the filter screen assembly comprises a filter screen seat arranged in the main box body, two filter screens which are symmetrical in front and back are arranged in the filter screen seat, two water suction pumps are arranged on the right side of the filter screen seat, a driving gear is arranged on the upper side of the filter screen seat, and a motor is arranged on the right side of the driving gear;
the speed measuring assembly comprises a centrifugal wheel, a left impeller cavity and a right impeller cavity are formed in the centrifugal wheel, impellers are fixed on the inner wall of the impeller cavity, six centrifugal block cavities with six openings being outwards are formed in the outer side of the impeller cavity, the six centrifugal block cavities are circumferentially distributed with the impeller cavity as the center, centrifugal blocks are slidably matched in the centrifugal block cavities, a sliding plate is arranged on the upper side of the centrifugal wheel, and a pull rope is fixed on the upper end face of the sliding plate.
Preferably, be equipped with filter screen seat chamber in the main tank body, be provided with the pipeline in the main tank body, pipeline left and right sides all outwards extends to outside the main tank body, be equipped with the logical chamber of lining up about in the pipeline, link up about the pipeline filter screen seat chamber, filter screen seat chamber left side intercommunication is equipped with two toper chambeies, two toper chamber left side intercommunication is equipped with the outside drainage chamber of opening, filter screen seat chamber right side intercommunication is equipped with two outlet, two toper chamber and two the drainage chamber all uses the pipeline is the front and back symmetry setting of center, two the toper chamber can be linked together with two filter screen chamber to make the rivers in the outlet flow into the toper intracavity through the filter screen.
Preferably, be equipped with two front and back symmetry's filter screen chamber in the filter screen seat, two the filter screen chamber is all controlled and is link up the filter screen seat, the filter screen is fixed in on the filter screen chamber inner wall, the filter screen seat with filter screen seat chamber and all sliding fit between the pipeline, all be fixed with first contact switch on the filter screen seat chamber front and back end wall, two all be fixed with the outside water sucking mouth of opening on the water sucking pump outside terminal surface, front and back both sides the outlet right with the corresponding side the water sucking pump intercommunication sets up, the water sucking pump can be through the water sucking mouth is inhaled clean sterile water, and the rethread outlet is discharged.
Preferably, the upper side of the filter screen seat cavity is communicated with a driving gear cavity, the motor is positioned on the right side of the driving gear cavity, the left end of the motor is in power connection with a motor shaft which extends leftwards into the driving gear cavity, the driving gear is fixed on the periphery of the motor shaft, the driving gear is meshed with the filter screen seat, and the filter screen seat can move forwards and backwards through the positive and negative rotation of the driving gear.
Preferably, the outside of the pipeline is provided with a centrifugal wheel cavity positioned on the right side of the motor, the centrifugal wheel cavity is arranged in an annular mode with the pipeline as the center, the centrifugal wheel is in running fit with the pipeline, the outer part of the centrifugal wheel extends outwards to the inside of the centrifugal wheel cavity, the impeller cavity is communicated with the through cavity, a second spring is fixed between the upper end face of the sliding plate and the upper end wall of the centrifugal wheel cavity, a second contact switch extending rightwards to the inside of the centrifugal wheel cavity is fixed in the left end wall of the centrifugal wheel cavity, the second contact switch is in butt joint with the sliding plate, a third spring is fixed between the bottom wall of the centrifugal block cavity and the centrifugal block, the centrifugal block can outwards move under the action of centrifugal force through rotation of the centrifugal wheel, so that the sliding plate moves upwards, and the release amount of heparin is controlled through a pull rope.
Preferably, the through cavity upper side intercommunication is equipped with heparin through cavity, heparin through cavity upper side intercommunication is equipped with heparin and deposits the chamber, heparin through cavity left side intercommunication is equipped with the baffle chamber, be fixed with first electro-magnet on the baffle chamber diapire, sliding fit has the baffle in the baffle chamber, the baffle with be fixed with the baffle spring between the first electro-magnet, through opening and shutting of baffle, whether steerable heparin releases.
Preferably, the heparin leads to chamber right side intercommunication and is equipped with the shutoff piece chamber, sliding fit has the shutoff piece in the shutoff piece chamber, the internal thread fit has the lead screw in the shutoff piece chamber, shutoff piece chamber right side is equipped with the terminal surface tooth chamber, terminal surface tooth chamber upside intercommunication is equipped with reset gear chamber, terminal surface tooth chamber right side is equipped with the line wheel chamber, lead screw right side portion extends to right side in the terminal surface tooth chamber, spline fit has the axle sleeve on the lead screw, the axle sleeve right side end is fixed with driven terminal surface tooth, the end normal running fit in axle sleeve left side has the magnetism axle sleeve seat, terminal surface tooth chamber left end wall internal fixation with lead screw normal running fit's second electro-magnet, magnetism axle sleeve seat with be fixed with first spring between the second electro-magnet, through the rotation of lead screw, can control the left and right movement of shutoff piece.
Preferably, a driving end face tooth shaft is rotatably matched in the right end wall of the end face tooth cavity, the left side part of the driving end face tooth shaft extends to the left side in the end face tooth cavity, the right side part of the driving end face tooth shaft extends to the right side in the line wheel cavity, a driving end face tooth capable of being meshed with the driven end face tooth is fixed at the left end of the driving end face tooth shaft, a one-way bearing is rotatably matched at the right end of the driving end face tooth shaft, a line wheel is rotatably matched at the periphery of the one-way bearing, the other end of the pull rope is fixed on the periphery of the line wheel, a first torsion spring is fixed between the right end face of the line wheel and the right end wall of the line wheel cavity, a reset gear shaft is rotatably matched at the right end wall of the reset gear cavity, a reset gear shaft is extended to the left side in the reset gear cavity, a second torsion spring is fixed between the left end face of the reset gear shaft and the left end wall of the reset gear cavity, and the driven end face tooth is meshed with the driving end face tooth, and the second torsion spring can be blocked or not under the action of the second torsion block.
The beneficial effects of the invention are as follows: according to the invention, the blood is filtered through the filter screen, so that the coagulated blood can be filtered out and moved forwards or backwards to the right side of the corresponding conical cavity, the coagulated blood on the filter screen is pumped and washed by the water pump at the corresponding side, so that the filter function is recovered, the clean filter screen is positioned in the through cavity, the filtering operation is performed, the coagulated blood is prevented from blocking a dialysis pipeline to the greatest extent, and the blood flow rate is detected through the impeller, so that the concentration of the blood is judged, and the heparin addition in the heparin storage cavity is controlled by controlling the gap between the left end face of the blocking block and the left side wall of the heparin through cavity, so that the heparin addition is reduced as much as possible under the condition that the blood is not coagulated, and the influence of heparin on the body of a patient is reduced to the greatest extent.
Drawings
FIG. 1 is a schematic view showing the overall structure of an extracorporeal circulation circuit for purifying blood according to the present invention;
FIG. 2 is a schematic illustration of A-A of FIG. 1 in accordance with the present invention;
FIG. 3 is a schematic illustration of B-B of FIG. 1 in accordance with the present invention;
FIG. 4 is an enlarged partial schematic view of the 20 component of FIG. 1 in accordance with the present invention;
fig. 5 is an enlarged partial schematic view of the 14 component of fig. 1 in accordance with the present invention.
In the figure:
10. a main case; 11. a drive gear; 12. a motor shaft; 13. a motor; 14. a centrifugal wheel; 15. a centrifugal wheel cavity; 16. a filter screen seat; 17. a heparin storage cavity; 18. a pipe; 19. a cavity is communicated; 20. heparin through cavity; 21. a drainage cavity; 22. a conical cavity; 23. a first contact switch; 24. a water pump; 25. an impeller cavity; 26. an impeller; 27. a water pumping port; 28. a water outlet; 29. a filter screen seat cavity; 30. a filter screen cavity; 31. a filter screen; 32. a drive gear cavity; 33. a baffle spring; 34. a baffle cavity; 35. a baffle; 36. a pull rope; 37. a wire wheel cavity; 38. a first torsion spring; 39. a wire wheel; 40. a screw rod; 41. plugging the block cavity; 42. a block; 43. a first electromagnet; 44. a second spring; 45. a slide plate; 46. a second contact switch; 47. a centrifugal block cavity; 48. a third spring; 49. a centrifugal block; 50. an end face tooth cavity; 51. a second torsion spring; 52. a reset gear; 53. a reset gear cavity; 54. resetting the gear shaft; 55. a one-way bearing; 56. a driving end face gear shaft; 57. a second electromagnet; 58. active end face teeth; 59. driven end face teeth; 60. a shaft sleeve; 61. a magnetic sleeve mount; 62. a first spring.
Detailed Description
For the purposes and advantages of the present invention to become more apparent, the following detailed description of the invention will be taken in conjunction with the examples, it being understood that the following text is provided to illustrate one or more specific embodiments of the invention and is not to be construed as limiting the scope of the invention in any way, but rather the terms upper, lower, left, and right, as used herein, are not limited to their strict geometric definitions, but include tolerances for machining or human error, and inconsistencies, the specific features of which are set forth in detail below:
referring to fig. 1 to 5, an extracorporeal circulation circuit for purifying blood according to an embodiment of the present invention includes a main casing 10, a filter screen assembly for filtering viscous blood is disposed in the main casing 10, and a speed measuring assembly for detecting a flow rate of blood is disposed on the right side of the filter screen assembly;
the filter screen assembly comprises a filter screen seat 16 arranged in the main box body 10, two filter screens 31 which are symmetrical in front and back are arranged in the filter screen seat 16, two water suction pumps 24 are arranged on the right side of the filter screen seat 16, a driving gear 11 is arranged on the upper side of the filter screen seat 16, and a motor 13 is arranged on the right side of the driving gear 11;
the speed measuring assembly comprises a centrifugal wheel 14, a left impeller cavity 25 and a right impeller cavity 25 which are communicated are arranged in the centrifugal wheel 14, impellers 26 are fixed on the inner wall of the impeller cavity 25, six centrifugal block cavities 47 with outwards openings are arranged on the outer side of the impeller cavity 25, the six centrifugal block cavities 47 are circumferentially distributed by taking the impeller cavity 25 as a center, centrifugal blocks 49 are slidably matched in the six centrifugal block cavities 47, a sliding plate 45 is arranged on the upper side of the centrifugal wheel 14, and a pull rope 36 is fixed on the upper end face of the sliding plate 45.
The main box 10 is internally provided with a filter screen seat cavity 29, the main box 10 is internally provided with a pipeline 18, the left side and the right side of the pipeline 18 are outwards extended to the outside of the main box 10, a left through cavity 19 and a right through cavity 19 are arranged in the pipeline 18, the left side and the right side of the pipeline 18 are communicated with the filter screen seat cavity 29, the left side of the filter screen seat cavity 29 is communicated with two conical cavities 22, the left side of the conical cavities 22 is communicated with an outwards opened water draining cavity 21, the right side of the filter screen seat cavity 29 is communicated with two water draining holes 28, the two conical cavities 22 and the two water draining cavities 21 are symmetrically arranged around the pipeline 18 as the center, and the two conical cavities 22 can be communicated with the two filter screen cavities 30, so that water flow in the water draining holes 28 can flow into the conical cavities 22 through the filter screens 31.
The filter screen seat 16 is internally provided with two filter screen cavities 30 which are symmetrical in front and back, the two filter screen cavities 30 are all communicated with the filter screen seat 16 left and right, the filter screen 31 is fixed on the inner wall of the filter screen cavity 30, the filter screen seat 16, the filter screen seat cavity 29 and the pipeline 18 are all in sliding fit, the front end wall and the rear end wall of the filter screen seat cavity 29 are all fixed with a first contact switch 23, when the first contact switch 23 is touched, the water suction pump 24 on the corresponding side can be started, the two water suction pump 24 are all fixed with water suction ports 27 with outward openings on the outer end surfaces of the water suction pump 24, the water suction ports 28 on the front side and the rear side are communicated with the water suction pump 24 on the corresponding side to the right, and the water suction pump 24 can suck clean sterile water through the water suction ports 27 and discharge the water through the water suction ports 28.
Advantageously, the upper side of the filter screen seat cavity 29 is communicated with a driving gear cavity 32, the motor 13 is located on the right side of the driving gear cavity 32, a motor shaft 12 extending leftwards into the driving gear cavity 32 is connected with the left end of the motor 13 in a power mode, the driving gear 11 is fixed on the periphery of the motor shaft 12, the driving gear 11 is meshed with the filter screen seat 16, and forward and backward movement of the filter screen seat 16 can be achieved through forward and backward rotation of the driving gear 11.
Advantageously, be located the centrifuge wheel chamber 15 on the right side of motor 13 is equipped with in the pipeline 18 outside, centrifuge wheel chamber 15 regards pipeline 18 as the annular setting of center, centrifuge wheel 14 with rotate between the pipeline 18, centrifuge wheel 14 outside part outwards extends to in the centrifuge wheel chamber 15, impeller chamber 25 with lead to the chamber 19 intercommunication setting, slide 45 up end with be fixed with second spring 44 between the upper end wall of centrifuge wheel chamber 15, be fixed with in the left end wall of centrifuge wheel chamber 15 extend to right to the second contact switch 46 in the centrifuge wheel chamber 15, can start when second contact switch 46 is touched motor 13, second contact switch 46 with can mutual butt between slide 45, be fixed with third spring 48 between the centrifuge block 49 with the centrifuge block chamber 47 diapire, through centrifuge wheel 14 rotates, can make centrifuge block 49 outwards move under the centrifugal force to make slide 45 upwards move, release the volume through the heparin of 36 control.
The heparin storage cavity 17 is arranged on the upper side of the through cavity 19 in a communicating mode, the heparin storage cavity 17 is arranged on the upper side of the heparin storage cavity 20 in a communicating mode, a baffle cavity 34 is arranged on the left side of the heparin storage cavity 20 in a communicating mode, a first electromagnet 43 is fixed on the bottom wall of the baffle cavity 34, a baffle 35 is slidably matched in the baffle cavity 34, opening and closing of the baffle 35 can be controlled through the power-off of the first electromagnet 43, a baffle spring 33 is fixed between the baffle 35 and the first electromagnet 43, and whether heparin is released or not can be controlled through opening and closing of the baffle 35.
Advantageously, the right side of the heparin through cavity 20 is communicated with a plugging block cavity 41, a plugging block 42 is slidably matched in the plugging block cavity 41, a screw rod 40 is matched in the plugging block 42, an end face tooth cavity 50 is arranged on the right side of the plugging block cavity 41, a reset gear cavity 53 is communicated with the upper side of the end face tooth cavity 50, a wire wheel cavity 37 is arranged on the right side of the end face tooth cavity 50, the right side of the screw rod 40 extends to the right side in the end face tooth cavity 50, a shaft sleeve 60 is in spline fit on the screw rod 40, a driven end face tooth 59 is fixed at the tail end of the right side of the shaft sleeve 60, a magnetic shaft sleeve seat 61 is in rotating fit with the left tail end of the shaft sleeve 60, a second electromagnet 57 in rotating fit with the screw rod 40 is fixed in the left end wall of the end face tooth cavity 50, a first spring 62 is fixed between the magnetic shaft sleeve seat 61 and the second electromagnet 57, whether the driven end face tooth 59 is meshed with the driving end face tooth 58 or not can be controlled by power loss of the second electromagnet 57, and the left and right movement of the plugging block 42 can be controlled by rotating the screw rod 40.
Advantageously, a driving end face gear shaft 56 is rotationally matched with the right end wall of the end face gear cavity 50, the left part of the driving end face gear shaft 56 extends to the left into the end face gear cavity 50, the right part of the driving end face gear shaft 56 extends to the right into the wire gear cavity 37, a driving end face gear 58 capable of being meshed with the driven end face gear 59 is fixed at the left end of the driving end face gear shaft 56, a one-way bearing 55 is rotationally matched with the right end of the driving end face gear shaft 56, a wire wheel 39 is rotationally matched with the outer circumference of the one-way bearing 55, the other end of the pull rope 36 is fixed on the outer circumference of the wire wheel 39, a first torsion spring 38 is fixed between the right end face of the wire wheel 39 and the right end wall of the wire wheel cavity 37, a reset gear shaft 54 is rotationally matched with the right end wall of the reset gear cavity 53, a reset gear 52 meshed with the driven end face gear 59 is fixed at the left end of the reset gear shaft 54, a torsion spring 51 is fixed between the left end face of the reset gear shaft 54 and the left end wall 53, and the driven end face gear 59 can be meshed with the second torsion spring 51 or not through the second torsion spring 51.
The invention relates to an extracorporeal circulation pipeline for blood purification, which comprises the following working procedures:
in the initial state, the elasticity of the second spring 44 is larger than the torsion force of the first torsion spring 38, so that the first torsion spring 38 is in a torsion state, the pull rope 36 is in a tightening state, the plugging block 42 is in the plugging block cavity 41, a gap exists between the left end face of the plugging block 42 and the left end wall of the heparin through cavity 20, the second electromagnet 57 is in a power-off state, the first spring 62 is in a loosening state, the driven end face teeth 59 are not meshed with the driving end face teeth 58, and the second torsion spring 51 is in a loosening state.
The left and right ends of the pipe 18 are connected to dialysis pipes, blood flows from left to right, the pumping ports 27 on the front and rear sides are connected to sterile physiological saline storage tanks, and the left ends of the drainage chambers 21 on the front and rear sides are connected to a waste liquid treatment tank.
When the hemodialysis apparatus is turned on, blood flows through the through-chamber 19 from left to right, thereby driving the impeller 26 to rotate, and thus the centrifugal wheel 14 to rotate, and further driving the six centrifugal blocks 49 to rotate about the impeller chamber 25, so that the six centrifugal blocks 49 are subjected to an outward centrifugal force, and thus the six centrifugal blocks 49 are moved outward against the elastic force of the third spring 48, and the slide plate 45 is pushed to move upward to the upper side of the second contact switch 46.
In this process, the sliding plate 45 touches the second contact switch 46, so that the motor 13 is turned off after being started for a period of time, and then in the process of starting the motor 13, the motor 13 drives the motor shaft 12 to rotate, so that the driving gear 11 rotates, and the filter screen seat 16 is driven to move forward, so that the rear filter screen 31 moves forward into the through cavity 19.
Simultaneously, the front filter screen 31 moves forward to the left of the front water outlet 28, and the filter screen seat 16 touches the front first contact switch 23, so that the front water pump 24 is started, sterile physiological saline is pumped through the front water pumping port 27, and then discharged through the front water outlet 28, and the front filter screen 31 is washed.
During this movement, the slide 45 moves upward to loosen the pull cord 36, which in turn causes the wire wheel 39 to reverse under the torque of the first torsion spring 38.
At this time, the second electromagnet 57 is activated, so that the second electromagnet 57 electrically repels the magnetic boss 61, and the boss 60 is driven to move rightward, so that the driven end face teeth 59 move rightward to engage with the driving end face teeth 58.
At this time, the first electromagnet 43 is started, so that the first electromagnet 43 attracts the baffle 35 electrically, and the baffle 35 moves leftwards to the baffle cavity 34 against the elastic force of the baffle spring 33, so that heparin in the heparin storage cavity 17 flows into the through cavity 19 through a gap between the heparin through cavity 20 and the blocking piece 42, and the heparin is mixed with blood to avoid blood coagulation.
If the gap between the blocking block 42 and the left side wall of the heparin through cavity 20 is too small, the amount of heparin added into the blood is too small, so that the blood is coagulated, and the coagulated blood is blocked to the left end face of the filter screen 31 due to the filtering effect of the filter screen 31.
At this time, as the filter screen 31 is blocked by the coagulated blood, the blood volume passing through the filter screen 31 is reduced, the blood flow rate is reduced, the rotation speed of the impeller 26 is reduced, the centrifugal force applied to the centrifugal block 49 is reduced, the centrifugal block 49 moves inwards under the action of the tension of the third spring 48, so that the sliding plate 45 moves forwards under the action of the elasticity of the second spring 44 until touching the second contact switch 46, the second contact switch 46 is triggered, and the motor 13 is turned off after a period of time is started reversely.
The motor 13 is reversely started, so that the motor shaft 12 is reversely rotated, the filter screen seat 16 is driven to move backwards, the filter screen 31 with the front side not blocked moves backwards into the through cavity 19, the filter screen 31 with the rear side blocked moves backwards to the right side of the conical cavity 22 at the rear side, the filter screen seat 16 contacts the first contact switch 23 at the rear side, the water suction pump 24 at the rear side is started, the filter screen 31 at the rear side is washed, and waste water is discharged through the conical cavity 22 and the water discharge cavity 21.
Simultaneously, the sliding plate 45 moves downwards to enable the pull rope 36 to be pulled, so that the wire wheel 39 rotates, the one-way bearing 55 is driven to rotate, the driving end face gear shaft 56 is driven to rotate, the driving end face gear 58 is driven to rotate, the driven end face gear 59 is driven to rotate, the shaft sleeve 60 is driven to rotate, the screw rod 40 is driven to rotate, the blocking block 42 is driven to move rightwards, the release amount of heparin is increased, and blood coagulation is reduced.
In this process, the driven end face teeth 59 rotate to drive the reset gear 52 to rotate, so that the reset gear shaft 54 rotates, and the second torsion spring 51 twists the power.
Due to the fact that heparin release amount is increased, blood coagulation is reduced, the rotating speed of the impeller 26 is increased, the sliding plate 45 moves backwards again to be far away from the second contact switch 46, the pulling rope 36 is loosened, the wire wheel 39 is reversed under the torsion action of the first torsion spring 38, the wire wheel 39 is reversed and can not drive the driving end face gear shaft 56 to rotate reversely due to the action of the one-way bearing 55, the driven end face gear 59 is meshed with the driving end face gear 58 at the moment, the torsion force of the second torsion spring 51 can not drive the wire wheel 39 to rotate reversely, and accordingly the torsion force of the second torsion spring 51 can not drive the driven end face gear 59 to rotate reversely, and the blocking block 42 is kept at the current position.
If there is a coagulation condition in the dialysis process, the rotation speed of the impeller 26 is reduced again, the wire wheel 39 rotates forward to drive the driving end face gear shaft 56 to rotate forward, so that the blocking block 42 continues to move rightward for a certain distance, the release amount of heparin is further increased, and the coagulation of the blood is further reduced, so that the use amount of heparin is reduced to the greatest extent under the condition that the blood is ensured not to be coagulated.
After hemodialysis is finished, the second electromagnet 57 can be powered off, so that the driven end face tooth 59 moves leftwards under the action of the tension of the first spring 62 to be disengaged from the driving end face tooth 58, and then the reset gear shaft 54 is reversed under the torsion action of the second torsion spring 51, so that the reset gear 52 is reversed, the driven end face tooth 59 is driven to be reversed, and the plugging block 42 moves leftwards to the initial position.
It will be apparent to those skilled in the art that various modifications to the above embodiments may be made without departing from the general spirit and concepts of the invention. Which fall within the scope of the present invention. The protection scheme of the invention is subject to the appended claims.
Claims (4)
1. An extracorporeal circulation circuit for purifying blood, comprising a main tank (10), characterized in that: a filter screen component for filtering viscous blood is arranged in the main box body (10), and a speed measuring component for detecting the flow rate of the blood is arranged on the right side of the filter screen component;
the filter screen assembly comprises a filter screen seat (16) arranged in the main box body (10), two filter screens (31) which are symmetrical front and back are arranged in the filter screen seat (16), two water suction pumps (24) are arranged on the right side of the filter screen seat (16), a driving gear (11) is arranged on the upper side of the filter screen seat (16), and a motor (13) is arranged on the right side of the driving gear (11); the speed measuring assembly comprises a centrifugal wheel (14), a left-right through impeller cavity (25) is arranged in the centrifugal wheel (14), impellers (26) are fixed on the inner wall of the impeller cavity (25), six centrifugal block cavities (47) with outwards openings are arranged on the outer side of the impeller cavity (25), the six centrifugal block cavities (47) are circumferentially distributed by taking the impeller cavity (25) as the center, centrifugal blocks (49) are slidably matched in the six centrifugal block cavities (47), a sliding plate (45) is arranged on the upper side of the centrifugal wheel (14), and a pull rope (36) is fixed on the upper end face of the sliding plate (45); the novel filter screen comprises a main box body (10), wherein a filter screen seat cavity (29) is arranged in the main box body (10), a pipeline (18) is arranged in the main box body (10), the left side and the right side of the pipeline (18) extend outwards to the outside of the main box body (10), a left through cavity (19) and a right through cavity (19) are arranged in the pipeline (18), the left side and the right side of the pipeline (18) are communicated with each other to form two conical cavities (22), two drain cavities (21) with outwards-opened openings are communicated with the left side of the conical cavities (22), two drain openings (28), two conical cavities (22) and two drain cavities (21) are symmetrically arranged around the pipeline (18); the heparin storage device is characterized in that a heparin through cavity (20) is communicated with the upper side of the through cavity (19), a heparin storage cavity (17) is communicated with the upper side of the heparin through cavity (20), a baffle cavity (34) is communicated with the left side of the heparin through cavity (20), a first electromagnet (43) is fixed on the bottom wall of the baffle cavity (34), a baffle (35) is slidably matched with the baffle cavity (34), and a baffle spring (33) is fixed between the baffle (35) and the first electromagnet (43); the heparin through cavity (20) is provided with a plugging block cavity (41) in a communicating manner on the right side, a plugging block (42) is slidably matched in the plugging block cavity (41), a screw rod (40) is in threaded fit in the plugging block (42), an end face tooth cavity (50) is arranged on the right side of the plugging block cavity (41), a reset gear cavity (53) is arranged on the upper side of the end face tooth cavity (50), a wire wheel cavity (37) is arranged on the right side of the end face tooth cavity (50), the right side part of the screw rod (40) extends to the right side into the end face tooth cavity (50), a shaft sleeve (60) is in spline fit on the screw rod (40), a driven end face tooth (59) is fixed at the right end of the shaft sleeve (60), a magnetic shaft sleeve seat (61) is in rotary fit with the left end of the shaft sleeve (60), a second electromagnet (57) in rotary fit with the screw rod (40) is fixed in the left end wall of the end face tooth cavity (50), and a first spring (62) is fixed between the magnetic shaft sleeve seat (61) and the second electromagnet (57); the gear is characterized in that a driving end face gear shaft (56) is rotatably matched in the right end wall of the end face gear cavity (50), the left side part of the driving end face gear shaft (56) extends to the left side in the end face gear cavity (50), the right side part of the driving end face gear shaft (56) extends to the right side in the end wall of the wire gear cavity (37), a driving end face gear (58) capable of being meshed with a driven end face gear (59) is fixedly arranged at the left side end of the driving end face gear shaft (56), a one-way bearing (55) is rotatably matched in the right side end of the driving end face gear shaft (56), a wire wheel (39) is rotatably matched in the periphery of the one-way bearing (55), the other end of the pull rope (36) is fixedly arranged in the periphery of the wire wheel (39), a first torsion spring (38) is fixedly arranged between the right end face of the wire wheel (39) and the right end wall of the wire wheel cavity (37), a reset gear shaft (54) is rotatably matched in the right end wall of the reset gear cavity (53), the left side part of the reset gear shaft (54) extends to the reset gear shaft (53) in the reset gear cavity (53), the left side part of the reset gear shaft (54) is rotatably matched with the reset gear (54), and the reset gear (52) is fixedly arranged between the left end face gear (54).
2. An extracorporeal circulation circuit for blood purification according to claim 1, wherein: the novel water pump is characterized in that two front-back symmetrical filter screen cavities (30) are arranged in the filter screen seat (16), the two filter screen cavities (30) are all left and right penetrated through the filter screen seat (16), a filter screen (31) is fixed on the inner wall of the filter screen cavity (30), the filter screen seat (16) is in sliding fit with the filter screen seat cavity (29) and the pipeline (18), first contact switches (23) are fixed on the front end wall and the back end wall of the filter screen seat cavity (29), water pumping ports (27) with outward openings are all fixed on the outer side end surfaces of the water pumping pumps (24), and the water draining ports (28) on the front side and the back side are rightwards communicated with the water pumping pumps (24) on the corresponding sides.
3. An extracorporeal circulation circuit for blood purification according to claim 1, wherein: the filter screen seat cavity (29) upside intercommunication is equipped with driving gear cavity (32), motor (13) are located driving gear cavity (32) right side, motor (13) left end power is connected with left extension to motor shaft (12) in driving gear cavity (32), driving gear (11) are fixed in on motor shaft (12) periphery, driving gear (11) with filter screen seat (16) intermeshing.
4. An extracorporeal circulation circuit for blood purification according to claim 1, wherein: the centrifugal wheel is characterized in that a centrifugal wheel cavity (15) positioned on the right side of the motor (13) is arranged on the outer side of the pipeline (18), the centrifugal wheel cavity (15) is annularly arranged with the pipeline (18) as a center, the centrifugal wheel (14) and the pipeline (18) are in running fit, the outer part of the centrifugal wheel (14) extends outwards into the centrifugal wheel cavity (15), the impeller cavity (25) is communicated with the through cavity (19), a second spring (44) is fixed between the upper end surface of the sliding plate (45) and the upper end wall of the centrifugal wheel cavity (15), a second contact switch (46) extending rightwards into the centrifugal wheel cavity (15) is fixed in the left end wall of the centrifugal wheel cavity (15), the second contact switch (46) and the sliding plate (45) can be mutually abutted, and a third spring (48) is fixed between the centrifugal block (49) and the bottom wall of the centrifugal block (47).
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| JP2021139612A (en) * | 2020-03-04 | 2021-09-16 | 佛山克情日用品有限公司 | Drying prevention air conditioner with filter self-cleaning function |
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| DE102014011671B4 (en) * | 2014-08-05 | 2023-12-28 | Fresenius Medical Care Deutschland Gmbh | Extracorporeal blood treatment unit |
| JP6452761B2 (en) * | 2017-06-13 | 2019-01-16 | 村田 智 | Perfusion device and method of operating the same |
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| JP2007117151A (en) * | 2005-10-25 | 2007-05-17 | Toray Ind Inc | Blood purifying column with pressure control means |
| CN103071195A (en) * | 2011-09-30 | 2013-05-01 | 泰科保健集团有限合伙公司 | Device to encourage blood circulation between dialysis |
| CN106334226A (en) * | 2016-08-31 | 2017-01-18 | 张进 | Multifunctional blood purification device |
| CN209437729U (en) * | 2018-02-07 | 2019-09-27 | 中国人民解放军总医院第一附属医院 | A kind of drainage tube flow velocity monitoring device |
| CN211675615U (en) * | 2020-01-13 | 2020-10-16 | 朱亮 | No heparin extracorporeal circulation return circuit pipe-line device |
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| CN113941040A (en) | 2022-01-18 |
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