A dilution autologous blood recovery adjustable device

Abstract

The application discloses a dilution type autologous blood recovery adjustable device and belongs to the technical field of medical devices. The device comprises a mounting base, a driving assembly and a dilution assembly. The double-plunger pump is synchronously driven by a common eccentric wheel seat matched with a single-adjusting sliding block, so that stepless and accurate adjustment of a dilution ratio can be realized. Meanwhile, through a pure mechanical linkage structure of a disc type separation rotating drum matched with a centrifugal hammer and a compensation fork, the pumping displacement is automatically fine-tuned with the change of the rotating drum speed, and self-adaptive compensation of working conditions is realized. The device is internally provided with a spiral flow guide inner core and an elastic buffer liquid storage bag, so that the liquid flow can be gently and the pumping pulsation can be weakened, the shear injury of blood formed elements is effectively reduced, the ratio adjustment and the speed compensation can be completed without an electric control sensor, the operation is simple, the ratio is stable, the device is suitable for various autologous blood recovery scenes such as conventional operations and primary emergency, and has good clinical popularization value and remarkable economic benefits.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to an adjustable device for diluting autologous blood recovery. Background Technology

[0002] The adjustable autologous blood dilution recovery device is a specialized device used in the field of perioperative blood conservation in surgery. Its main function is to centrifuge the autologous blood recovered during surgery, mix it evenly with a diluent according to a preset ratio, and then reinfuse it into the patient's body to maintain effective circulating blood volume and reduce the risk of allogeneic blood transfusion. The "adjustable" in the name corresponds to the device's ability to steplessly control the dilution ratio and adapt to changing conditions. This is achieved through a coaxial eccentric pump adjustment structure and a centrifugal hammer mechanical linkage mechanism, which can achieve precise control and dynamic stability of the dilution ratio under a purely mechanical structure.

[0003] In clinical practice, existing conventional mechanical autologous blood recovery and dilution devices mostly employ a dual-pump, independently adjustable or fixed-ratio flow channel structure. When adjusting the dilution ratio, medical staff must separately adjust the parameters of both pumps, resulting in cumbersome procedures and difficulty in ensuring adjustment accuracy, making it difficult to quickly adapt to the clinical needs of different patients. Furthermore, these devices lack adaptive compensation capabilities under various operating conditions. When changes in patient blood viscosity or fluctuations in separation load cause changes in centrifugation speed, the actual dilution ratio is prone to drift, making it impossible to maintain a stable reinfusion concentration. Additionally, some devices have simple mixing channel designs, which are prone to generating turbulent shear stress, increasing the risk of damage to the formed elements of the blood. Therefore, this paper proposes an adjustable autologous blood recovery and dilution device to address these issues. Summary of the Invention

[0004] To overcome the above shortcomings, the present invention provides an adjustable dilution autologous blood recovery device, which aims to improve the problems of existing mechanical autologous blood recovery and dilution devices, such as cumbersome operation for dilution ratio adjustment, insufficient control precision, lack of working condition adaptive compensation and easy dilution ratio drift, while reducing blood shear damage and blood cell destruction.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A dilute autologous blood recovery adjustable device includes a mounting base for support, a drive assembly mounted on top of the mounting base, and a dilution assembly mounted on top of the drive assembly. The dilution assembly includes a protective shell, on the inner wall of which a blood plunger pump cylinder is mounted. A diluent plunger pump cylinder is mounted on one side of the blood plunger pump cylinder. A common eccentric wheel seat is located in the middle of the blood and diluent plunger pump cylinders. Sliding grooves are formed on both sides of the upper surface of the common eccentric wheel seat, and an adjusting slider is slidably mounted inside the grooves. An adjusting screw is horizontally inserted through the middle of the adjusting slider. A connecting spindle is mounted in the middle of the upper surface of the common eccentric wheel seat. A mixing chamber shell is correspondingly located at the upper end of the connecting spindle. A centrifugal separator shell is connected to the rear side of the upper surface of the mixing chamber shell. A centrifugal separator shell is vertically installed inside the centrifugal separator shell. The system includes a disc-type separating drum, with the mixing chamber housing fixedly mounted on top of the protective shell. The drive assembly is connected to the shared eccentric wheel seat, providing rotational power for the entire pumping and centrifugation unit. When the adjusting screw rotates, it drives the adjusting slider to move along the slide groove, synchronously changing the eccentric stroke of the plungers in the blood plunger pump cylinder and the diluent plunger pump cylinder. The lower end of the rotating optical shaft of the disc-type separating drum is coaxially connected to the connecting main shaft and can rotate synchronously with the connecting main shaft. The disc-type separating drum is equipped with a centrifugal hammer and a compensation fork. The displacement of the centrifugal hammer caused by changes in rotational speed is transmitted to the adjusting slider through the compensation fork to automatically fine-tune the pumping volume.

[0006] As a further description of the above technical solution: a lifting plunger is vertically installed inside the cylinder of the blood plunger pump. A first deformable rod is connected to the upper end of the lifting plunger. A connecting block is connected to the annular surface of the common eccentric wheel seat near the first deformable rod. A second deformable rod is connected to one side of the first deformable rod. The lower end of the second deformable rod is rotatably connected to the connecting block. The lifting plunger, the first deformable rod, the second deformable rod, and the connecting block are rotatably connected through multiple lifting hinge shafts to form a linkage mechanism that converts the rotational motion of the common eccentric wheel seat into the reciprocating motion of the lifting plunger.

[0007] As a further description of the above technical solution: a compensating hinge shaft is connected to the upper part of the cylinder surface on the side of the diluent plunger pump cylinder away from the blood plunger pump cylinder. A U-shaped compensating fork is rotatably mounted on the surface of the compensating hinge shaft. The end of the compensating fork away from the compensating hinge shaft contacts the right side of the adjusting slider. The disc-type separating drum also includes a return spring and a transmission sleeve sleeved on the rotating optical shaft. The centrifugal hammer is connected to the transmission sleeve through a hinge plate. The transmission sleeve is rotatably connected to the upper end of the compensating fork through an L-shaped connecting rod. When the centrifugal hammer opens and closes with the change of rotation speed, it drives the transmission sleeve to move axially, thereby causing the compensating fork to swing and pushing the adjusting slider to move horizontally.

[0008] As a further description of the above technical solution: the upper and lower ends of the blood plunger pump cylinder and the diluent plunger pump cylinder are both connected to inlet and outlet ports. Two sets of umbrella-shaped one-way valves are installed on the surface of the inlet and outlet ports. The outlet ports located at the lower ends of the blood plunger pump cylinder and the diluent plunger pump cylinder are respectively connected to blood input pipe and diluent input pipe. The upper ends of the blood input pipe and the diluent input pipe are connected to the left and right sides of the lower end of the mixing chamber shell. The lower left side of the centrifugal separation chamber shell is connected to a concentrated blood outlet pipe. The lower end of the concentrated blood outlet pipe is connected to the inlet port at the upper end of the blood plunger pump cylinder. The upper end of the diluent plunger pump cylinder is connected to an external connecting pipe. The injection end of the external connecting pipe extends to the outside of the protective shell.

[0009] As a further description of the above technical solution: two support shafts are embedded in the grooves at both ends of the adjusting screw. An operating knob is connected to the end of the adjusting screw away from the blood plunger pump cylinder. A scale is correspondingly provided on the surface of the end of the operating knob away from the adjusting screw. The scale on the scale corresponds to the position of the adjusting slider and is used to indicate the current dilution ratio.

[0010] As a further description of the above technical solution: the disc-type separation drum includes a rotating optical shaft vertically installed inside the centrifugal separation chamber shell. A mixing cylinder is installed at the lower end of the rotating optical shaft. Multiple disc cones are installed on the outer ring surface of the mixing cylinder. A return spring is sleeved on the upper end of the rotating optical shaft. A transmission sleeve is connected to the upper end of the return spring. Multiple hinge plates are connected to the upper end of the outer ring surface of the transmission sleeve. A following shaft passes through the interior of each hinge plate. A fly hammer passes through both ends of each following shaft. An L-shaped connecting rod is fixedly connected to the top of the transmission sleeve. The lower end of the L-shaped connecting rod is rotatably connected to the middle of the upper end of the compensation fork. The lower end of the rotating optical shaft of the disc-type separation drum is coaxially connected to the connecting main shaft. The rotating optical shaft can rotate synchronously with the connecting main shaft, driving the mixing cylinder and the disc cones to rotate synchronously.

[0011] As a further description of the above technical solution: the slide groove extends horizontally left and right along the radial direction of the common eccentric wheel seat, and when the adjusting slider moves left and right along the slide groove, it simultaneously drives the lifting plunger in the blood plunger pump cylinder and the diluent plunger pump cylinder to change the eccentric stroke.

[0012] As a further description of the above technical solution: the adjusting screw is a single-direction screw, with both ends of the screw body supported by a supporting shaft, and the middle part of the screw body threadedly engaged with the adjusting slider. When the screw rotates, it drives the adjusting slider to move linearly back and forth along the slide groove.

[0013] As a further description of the above technical solution: a spiral guide core is fixedly connected to the top of the mixing chamber shell, and a buffer reservoir is connected to the upper end of the spiral guide core. A return output connector is connected to the upper end of the buffer reservoir, and an overflow pressure relief valve is installed on the front side of the buffer reservoir.

[0014] As a further description of the above technical solution: the drive assembly includes a horizontal motor, a transmission reduction gearbox is installed on the front side of the horizontal motor, a vertical bevel gear is installed on the rear side of the inner wall of the transmission reduction gearbox, a horizontal bevel gear meshes with the upper end of the vertical bevel gear, a rotating main shaft passes through the middle of the horizontal bevel gear, and a controller is installed on the front side of the protective shell.

[0015] The present invention has the following beneficial effects: 1. In this invention, by rotating a single operating knob to drive the adjusting screw to rotate, the adjusting slider in the shared eccentric wheel seat is driven to move along the slide groove, and the eccentric stroke of the blood plunger pump and the diluent plunger pump is changed simultaneously, so as to realize stepless and precise adjustment of the dilution ratio. There is no need to adjust the two pumps separately, the operation steps are greatly simplified, and the accuracy of the ratio control and the adjustment efficiency are significantly improved.

[0016] 2. In this invention, the centrifugal hammer on the disc-type separating drum generates opening and closing displacement as the rotation speed changes, which drives the transmission slide to move back and forth along the axial direction. Through the linkage of the compensation fork, the adjusting slider is automatically fine-tuned to adjust the pumping displacement. This achieves adaptive proportional compensation of the working condition of the pure mechanical structure. It can offset the ratio drift caused by load fluctuation without the need to install additional electronic control sensing elements, thereby improving the stability of the device operation and its adaptability to complex scenarios.

[0017] 3. In this invention, by setting a spiral guide core and a buffer reservoir in the mixing chamber shell, the two fluids are guided to flow and mix smoothly along the spiral path, and the pumping pulsation is suppressed, which effectively reduces the shear damage of the formed elements of blood and ensures the safety of reinfusion. Attached Figure Description

[0018] Figure 1 This is a three-dimensional schematic diagram of an adjustable device for dilution autologous blood recovery proposed in this invention; Figure 2 This is a schematic cross-sectional view of an adjustable autologous blood recovery device for dilution proposed in this invention. Figure 3 This is a schematic diagram of the dilution component structure of an adjustable autologous blood recovery device proposed in this invention; Figure 4 for Figure 3 Enlarged view of point A in the middle; Figure 5 for Figure 3 Enlarged view of section B in the middle; Figure 6This is a schematic diagram of the disc-type separation drum structure of an adjustable device for dilution autologous blood recovery proposed in this invention; Figure 7 for Figure 6 Enlarged view at point C; Figure 8 This is a schematic diagram of the surface connection structure of the common eccentric wheel seat of an adjustable device for dilution autologous blood recovery proposed in this invention; Figure 9 for Figure 6 Enlarged view of point D in the middle.

[0019] Legend: 1. Mounting base; 2. Dilution assembly; 201. Protective shell; 202. Blood plunger pump cylinder; 203. Diluent plunger pump cylinder; 204. Common eccentric wheel seat; 205. Slide groove; 206. Adjusting slider; 207. Adjusting screw; 208. Connecting spindle; 209. Mixing chamber shell; 210. Centrifugal separation chamber shell; 211. Disc-type separation drum; 211-1. Rotating optical axis; 211-2. Mixing cylinder; 211-3. Disc cone angle; 211-4. Return spring; 211-5. Transmission sliding sleeve; 211-6. Hinge plate; 211-7. Follower shaft; 211-8. Flying hammer; 211-9. L-shaped connecting rod; 211-10. Concentrated blood outlet tube; 211-11. External connection 212. Lifting plunger; 213. First deforming rod; 214. Connecting block; 215. Second deforming rod; 216. Lifting hinge shaft; 217. Compensating hinge shaft; 218. Compensating shift fork; 219. Inlet; 220. Outlet; 221. Umbrella-shaped check valve; 222. Blood input tube; 223. Diluent input tube; 224. Support shaft; 225. Operating knob; 226. Digitizer dial; 227. Spiral guide core; 228. Buffer reservoir; 229. Return / output connector; 230. Overflow pressure relief valve; 3. Drive assembly; 301. Horizontal motor; 302. Transmission gearbox; 303. Vertical bevel gear; 304. Horizontal bevel gear; 305. Rotary spindle; 4. Controller. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Reference Figures 1-9 An embodiment of a dilute autologous blood recovery adjustable device provided by the present invention: A dilution-type autologous blood recovery adjustable device includes a mounting base 1 for supporting the device, a drive assembly 3 mounted on the top of the mounting base 1, and a dilution assembly 2 mounted on the top of the drive assembly 3.

[0022] Drive component 3: Drive component 3 is the power source of the entire machine, refer to... Figure 1 and Figure 2 The system includes a horizontal motor 301, which is horizontally fixed to the rear side of the top surface of the mounting base 1. A transmission reduction gearbox 302 is mounted on the front end of the motor's output shaft. A vertical bevel gear 303 is mounted on the rear side of the inner wall of the transmission reduction gearbox 302. The vertical bevel gear 303 is coaxially fixed to the output shaft of the horizontal motor 301. A horizontal bevel gear 304 meshes with the upper end of the vertical bevel gear 303, and a rotating main shaft 305 is vertically fixed through the middle of the horizontal bevel gear 304. The bevel gear pair converts the horizontally input rotational power into vertically upward output power, simultaneously achieving speed reduction and torque increase. A controller 4 is mounted on the front side of the protective shell 201. The controller 4 is electrically connected to the horizontal motor 301 and is used to control its start / stop and speed.

[0023] Dilution Component 2: Dilution component 2 includes a protective shell 201, on the inner wall of which a blood plunger pump cylinder 202 is installed. A diluent plunger pump cylinder 203 is installed on one side of the blood plunger pump cylinder 202, with the two cylinders arranged symmetrically on the left and right. A common eccentric wheel seat 204 is provided in the middle of the blood plunger pump cylinder 202 and the diluent plunger pump cylinder 203. The bottom of the common eccentric wheel seat 204 is coaxially fixed to the rotating main shaft 305 to obtain rotational power. Slide grooves 205 are provided on the left and right sides of the upper surface of the common eccentric wheel seat 204. The slide grooves 205 extend horizontally to the left and right along the radial direction of the common eccentric wheel seat 204. An adjusting slider 206 is slidably arranged inside the slide groove 205, and an adjusting screw 207 is horizontally inserted through the middle of the adjusting slider 206. The adjusting screw 207 is a single-direction screw. Both ends of the screw are supported within the slide groove 205 by support shafts 224. The middle of the screw is threaded into the adjusting slider 206. An operating knob 225 is connected to the end of the adjusting screw 207 furthest from the blood plunger pump cylinder 202. A scale 226 is correspondingly provided on the surface of the end of the operating knob 225 furthest from the adjusting screw 207. Rotating the operating knob 225 rotates the adjusting screw 207, driving the adjusting slider 206 to move linearly back and forth along the slide groove 205.

[0024] The plunger pump transmission mechanism: A lifting plunger 212 is vertically installed inside the blood plunger pump cylinder 202. A first deformable rod 213 is connected to the upper end of the lifting plunger 212. A connecting block 214 is connected to the annular surface of a common eccentric wheel seat 204 near the first deformable rod 213. A second deformable rod 215 is connected to one side of the first deformable rod 213. The lower end of the second deformable rod 215 is rotatably connected to the connecting block 214. The lifting plunger 212, the first deformable rod 213, the second deformable rod 215, and the connecting block 214 are rotatably connected by multiple lifting hinge shafts 216, forming a crank-connecting rod mechanism. When the common eccentric wheel seat 204 rotates, the rotational motion is converted into the vertical reciprocating motion of the lifting plunger 212 through the connecting rod mechanism, realizing volumetric quantitative pumping. The diluent plunger pump cylinder 203 also has a lifting plunger and a connecting rod mechanism, and the eccentric stroke of the two plungers is synchronously controlled by the position of the adjusting slider 206.

[0025] Fluid piping and check valves: Both the upper and lower ends of the blood plunger pump cylinder 202 and the diluent plunger pump cylinder 203 are connected to inlet ports 219 and outlet ports 220. Two sets of umbrella-shaped check valves 221 are installed on the surfaces of both inlet ports 219 and outlet ports 220 to control unidirectional fluid flow. The outlet ports 220 at the lower ends of the blood plunger pump cylinder 202 and the diluent plunger pump cylinder 203 are respectively connected to blood input pipes 222 and diluent input pipes 223. The upper ends of the blood input pipes 222 and the diluent input pipes 223 are connected to the left and right sides of the lower end of the mixing chamber shell 209. The lower left side of the centrifuge chamber shell 210 is connected to a concentrated blood outlet pipe 211-10. The lower end of the concentrated blood outlet pipe 211-10 is connected to the inlet port 219 at the upper end of the blood plunger pump cylinder 202, introducing the separated concentrated blood into the blood pump. The upper end of the cylinder body 203 of the diluent plunger pump is connected to an external connecting pipe 211-11. The injection end of the external connecting pipe 211-11 extends to the outside of the protective shell 201 for introducing diluent.

[0026] Centrifugal Separation and Speed ​​Compensation Mechanism: A connecting main shaft 208 is installed in the middle of the upper surface of the shared eccentric wheel seat 204. A mixing chamber housing 209 is correspondingly provided at the upper end of the connecting main shaft 208, and the mixing chamber housing 209 is fixedly installed on the top of the protective shell 201. A centrifugal separation chamber shell 210 is connected to the rear side of the upper surface of the mixing chamber housing 209. A disc-type separation drum 211 is vertically installed inside the centrifugal separation chamber shell 210. The disc-type separation drum 211 includes a rotating optical shaft 211-1 vertically installed inside the centrifugal separation chamber shell 210. A mixing cylinder 211-2 is installed at the lower end of the surface of the rotating optical shaft 211-1. Multiple disc cones 211-3 are installed on the outer ring surface of the mixing cylinder 211-2. The lower end of the rotating optical shaft 211-1 is coaxially connected to the connecting main shaft 208 and can rotate synchronously with the connecting main shaft 208, driving the mixing cylinder 211-2 and the disc cones 211-3 to rotate synchronously, thereby realizing the centrifugal separation of blood. A return spring 211-4 is fitted onto the upper end of the rotating optical shaft 211-1. A transmission sleeve 211-5 is connected to the upper end of the return spring 211-4. Multiple hinge plates 211-6 are connected to the upper end of the outer ring surface of the transmission sleeve 211-5. A following shaft 211-7 passes through the interior of each hinge plate 211-6. A flyweight 211-8 passes through both ends of each following shaft 211-7. An L-shaped connecting rod 211-9 is fixedly connected to the top of the transmission sleeve 211-5. A compensating hinge shaft 217 is connected to the upper part of the cylinder surface of the diluent plunger pump cylinder 203 on the side away from the blood plunger pump cylinder 202. A U-shaped compensating fork 218 is rotatably mounted on the surface of the compensating hinge shaft 217. The lower end of the L-shaped connecting rod 211-9 is rotatably connected to the middle part of the upper end of the compensating fork 218. The end of the compensating fork 218 away from the compensating hinge shaft 217 is in contact with the right side of the adjusting slider 206. When the drum speed changes due to load variations, the centrifugal force on the fly hammer 211-8 changes accordingly, driving the transmission sleeve 211-5 to reciprocate axially. This, in turn, drives the compensation fork 218 to swing via the L-shaped connecting rod 211-9, thereby pushing the adjusting slider 206 to move slightly, automatically fine-tuning the pumping capacity of the diluent pump, and achieving adaptive compensation under operating conditions.

[0027] Low-shear mixing and output: A spiral guide core 227 is fixedly connected to the top of the mixing chamber housing 209. A buffer reservoir 228 is connected to the upper end of the spiral guide core 227, and a return-to-output connector 229 is connected to the upper end of the buffer reservoir 228. An overflow relief valve 230 is installed on the front side of the buffer reservoir 228. After blood and diluent enter the mixing chamber housing 209, they rise smoothly and spirally along the spiral guide core 227, mixing evenly under low-shear conditions. They then enter the buffer reservoir 228 to eliminate pumping pulsations and are finally returned to the patient via the return-to-output connector 229. When the pipeline pressure rises abnormally, the overflow relief valve 230 automatically opens to release pressure, ensuring blood safety.

[0028] Working principle: During use, the horizontal motor 301 is started by the controller 4. The horizontal rotational power output by the horizontal motor 301 is reduced in direction by the vertical bevel gear 303 and the horizontal bevel gear 304 in the transmission reduction gearbox 302, which drives the rotating main shaft 305 to rotate vertically. Then, through the connecting main shaft 208, it synchronously drives the shared eccentric wheel seat 204 and the disc separation drum 211 to rotate, thus completing the power transmission. The blood recovered during the operation enters the disc separation drum 211 in the centrifugal separation chamber shell 210. With the high-speed rotation of the mixing cylinder 211-2 and the disc cone angle 211-3, the plasma is separated under the action of centrifugal force. The concentrated blood cells flow into the upper inlet 219 of the blood plunger pump cylinder 202 through the concentrated blood outlet pipe 211-10; at the same time, the diluent flows into the upper inlet 219 of the diluent plunger pump cylinder 203 through the external connecting pipe 211-11. When the shared eccentric wheel seat 204 rotates, it drives the two lifting plungers 212 on both sides to reciprocate up and down through the linkage transmission structure. Combined with the one-way conduction of the umbrella-shaped check valve 221, this pumps the liquid out of the cylinder and into the bottom of the mixing chamber housing 209 via the blood input pipe 222 and the diluent input pipe 223. When the dilution ratio needs to be adjusted, the operating knob 225 on the side wall of the protective housing is rotated. This rotates the adjusting screw 207, which in turn drives the adjusting slider 206 to move left and right along the slide groove 205, simultaneously changing the eccentric stroke and single pumping volume of the two lifting plungers 212. The target dilution ratio can be precisely locked through the dial 226. When changes in blood viscosity or load fluctuations cause a decrease in drum speed, the centrifugal force on the flyweight 211-8 decreases. The return spring 211-4 pushes the transmission sleeve 211-5 downward along the axial direction, which drives the compensation fork 218 to swing around the compensation hinge shaft 217 via the L-shaped connecting rod 211-9. The lower end of the compensation fork 218 pushes the adjusting slider 206 to move slightly, automatically fine-tuning the pumping volume of the diluent pump to compensate for the proportional deviation caused by changes in separation efficiency. When the speed increases, the centrifugal force of the flyweight increases, driving the transmission sleeve upward and adjusting the slider position in the opposite direction to maintain a stable dilution ratio. After the blood and diluent enter the mixing chamber housing 209, they rise gently along the spiral guide core 227, mixing evenly under low shear conditions. They then enter the buffer reservoir 228 to eliminate pumping pulsations and are finally returned to the patient via the return output connector 229. When the pipeline pressure rises abnormally, the overflow pressure relief valve 230 automatically opens to relieve pressure, ensuring blood safety.

[0029] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An adjustable device for dilution autologous blood recovery, comprising a mounting base (1) for supporting the blood, characterized in that: The mounting base (1) is equipped with a drive assembly (3) on top, and the drive assembly (3) is equipped with a dilution assembly (2) on top. The dilution assembly (2) includes a protective shell (201) for protection. A blood plunger pump cylinder (202) is installed on the inner wall of the protective shell (201). A diluent plunger pump cylinder (203) is installed on one side of the blood plunger pump cylinder (202). A common eccentric wheel seat (204) is provided in the middle of the blood plunger pump cylinder (202) and the diluent plunger pump cylinder (203). Sliding grooves (205) are provided on the left and right sides of the upper surface of the common eccentric wheel seat (204). An adjusting slider (206) is slidably disposed inside the slide groove (205). An adjusting screw (207) is horizontally inserted through the middle of the adjusting slider (206). A connecting spindle (208) is installed in the middle of the upper surface of the common eccentric wheel seat (204). A mixing chamber shell (209) is correspondingly disposed at the upper end of the connecting spindle (208). A centrifugal separation chamber shell (210) is connected to the rear side of the upper surface of the mixing chamber shell (209). The centrifugal separation chamber shell (210) is vertically disposed inside. A disc-type separating drum (211) is installed, and the mixing chamber housing (209) is fixedly installed on the top of the protective shell (201); the drive assembly (3) is connected to the common eccentric wheel seat (204) to provide rotational power for the entire pumping and centrifugation unit; when the adjusting screw (207) rotates, it drives the adjusting slider (206) to translate along the slide groove (205), and synchronously changes the plungers in the blood plunger pump cylinder (202) and the diluent plunger pump cylinder (203). The eccentric stroke; the lower end of the rotating optical axis (211-1) of the disc-type separating drum (211) is coaxially connected with the connecting main shaft (208) and can rotate synchronously with the connecting main shaft (208); the disc-type separating drum (211) is provided with a centrifugal hammer (211-8) and a compensation fork (218). The displacement of the centrifugal hammer (211-8) generated by the change of rotation speed is transmitted to the adjusting slider (206) through the compensation fork (218) to automatically fine-tune the pumping displacement.

2. The adjustable device for dilution-type autologous blood recovery according to claim 1, characterized in that: A lifting plunger (212) is vertically installed inside the cylinder body (202) of the blood plunger pump. A first deformable rod (213) is connected to the upper end of the lifting plunger (212). A connecting block (214) is connected to the annular surface of the common eccentric wheel seat (204) near the first deformable rod (213). A second deformable rod (215) is connected to one side of the first deformable rod (213). The lower end of the second deformable rod (215) is rotatably connected to the connecting block (214). The lifting plunger (212), the first deformable rod (213), the second deformable rod (215) and the connecting block (214) are rotatably connected by multiple lifting hinge shafts (216) to form a linkage mechanism that converts the rotational motion of the common eccentric wheel seat (204) into the reciprocating motion of the lifting plunger (212).

3. The adjustable device for dilution-type autologous blood recovery according to claim 1, characterized in that: The upper part of the cylinder surface of the diluent plunger pump cylinder (203) away from the blood plunger pump cylinder (202) is connected to a compensating hinge shaft (217). A U-shaped compensating fork (218) is rotatably disposed on the surface of the compensating hinge shaft (217). The end of the compensating fork (218) away from the compensating hinge shaft (217) is in contact with the right side of the adjusting slider (206). The disc-type separating drum (211) also includes a return spring (211-4) and a transmission sleeve sleeved on the rotating optical shaft (211-1). (211-5), the centrifugal flying hammer (211-8) is connected to the transmission sleeve (211-5) through the hinge plate (211-6), and the transmission sleeve (211-5) is rotatably connected to the upper end of the compensation fork (218) through the L-shaped connecting rod (211-9); when the centrifugal flying hammer (211-8) opens and closes with the change of rotation speed, it drives the transmission sleeve (211-5) to move axially, thereby driving the compensation fork (218) to swing and pushing the adjusting slider (206) to translate.

4. The adjustable device for dilution-type autologous blood recovery according to claim 1, characterized in that: The upper and lower ends of the blood plunger pump cylinder (202) and the diluent plunger pump cylinder (203) are connected to an inlet (219) and an outlet (220), respectively. Two sets of umbrella-shaped one-way valves (221) are installed on the surfaces of both the inlet (219) and the outlet (220). The outlet (220) at the lower end of the blood plunger pump cylinder (202) and the diluent plunger pump cylinder (203) are respectively connected to a blood input pipe (222) and a diluent input pipe (223). The upper end of the inlet pipe (223) is connected to the lower left and right sides of the mixing chamber shell (209); the lower left side of the centrifugal separation chamber shell (210) is connected to the concentrated blood outlet pipe (211-10), and the lower end of the concentrated blood outlet pipe (211-10) is connected to the liquid inlet (219) at the upper end of the blood plunger pump cylinder (202); the upper end of the diluent plunger pump cylinder (203) is connected to the external connecting pipe (211-11), and the injection end of the external connecting pipe (211-11) extends to the outside of the protective shell (201).

5. The adjustable device for dilution autologous blood recovery according to claim 1, characterized in that: Two supporting rotating shafts (224) are embedded in the sliding grooves (205) at both ends of the adjusting screw (207). An operating knob (225) is connected to the end of the adjusting screw (207) away from the blood plunger pump cylinder (202). A scale (226) is correspondingly provided on the surface of the end of the operating knob (225) away from the adjusting screw (207). The scale on the scale (226) corresponds to the position of the adjusting slider (206) and is used to indicate the current dilution ratio.

6. The adjustable device for dilution-type autologous blood recovery according to claim 1, characterized in that: The disc-type separation drum (211) includes a rotating optical shaft (211-1) vertically installed inside the centrifugal separation chamber shell (210). A mixing cylinder (211-2) is installed at the lower end of the rotating optical shaft (211-1). A plurality of disc cones (211-3) are installed on the outer ring surface of the mixing cylinder (211-2). A return spring (211-4) is sleeved on the upper end of the rotating optical shaft (211-1). A transmission sleeve (211-5) is connected to the upper end of the return spring (211-4). A plurality of hinge plates (211-6) are connected to the upper end of the outer ring surface of the transmission sleeve (211-5). Each hinge plate (211-6) has a hinge plate (211-6) with a hinge plate (211-6) having a hinge plate (211-6) ... -6) Each of the following shafts (211-7) is penetrated through the interior. Each of the following shafts (211-7) has a flying hammer (211-8) through both ends. The top of the transmission sleeve (211-5) is fixedly connected to an L-shaped connecting rod (211-9). The lower end of the L-shaped connecting rod (211-9) is rotatably connected to the middle of the upper end of the compensation fork (218). The lower end of the rotating optical axis (211-1) of the disc-type separating drum (211) is coaxially connected to the connecting main shaft (208). The rotating optical axis (211-1) can rotate synchronously with the connecting main shaft (208), driving the mixing cylinder (211-2) and the disc cone angle (211-3) to rotate synchronously.

7. The adjustable device for dilution-type autologous blood recovery according to claim 1, characterized in that: The slide groove (205) extends horizontally to the left and right along the radial direction of the common eccentric wheel seat (204). When the adjusting slider (206) moves horizontally to the left and right along the slide groove (205), it simultaneously drives the lifting plunger (212) in the blood plunger pump cylinder (202) and the diluent plunger pump cylinder (203) to change the eccentric stroke.

8. The adjustable device for dilution autologous blood recovery according to claim 5, characterized in that: The adjusting screw (207) is a single-direction screw. The two ends of the screw body are limited and supported by the support shaft (224). The middle part of the screw body is threadedly engaged with the adjusting slider (206). When the screw rotates, it drives the adjusting slider (206) to move linearly back and forth along the slide groove (205).

9. The adjustable device for dilution-type autologous blood recovery according to claim 1, characterized in that: The top of the mixing chamber housing (209) is fixedly connected to a spiral guide core (227), the upper end of which is connected to a buffer reservoir (228), the upper end of which is connected to a return output connector (229), and an overflow pressure relief valve (230) is installed on the front side of the buffer reservoir (228).

10. The adjustable device for dilution-type autologous blood recovery according to claim 1, characterized in that: The drive assembly (3) includes a horizontal motor (301), a transmission reduction gearbox (302) is installed on the front side of the horizontal motor (301), a vertical bevel gear (303) is installed on the rear side of the inner wall of the transmission reduction gearbox (302), a horizontal bevel gear (304) meshes with the upper end of the vertical bevel gear (303), a rotating spindle (305) passes through the middle of the horizontal bevel gear (304), and a controller (4) is installed on the front side of the protective shell (201).

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