Extracorporeal circulation pumping system for blood separator

Abstract

The present application relates to the technical field of blood separation equipment, and specifically to an extracorporeal circulation pumping system for a blood separation machine, which at least includes a motor, a rotary assembly driven to rotate by the motor, an extrusion arc wall wrapped around the outer side of the rotary assembly, and a soft pipeline arranged between the extrusion arc wall and the rotary assembly. The rotary assembly includes a rotary shell, a central component, a radial shifting lever, and a roller assembly; the rotary shell includes a shell main part, a central chamber, a radial chamber, and a translation chamber; the central component includes a central rotating shaft and a central pressure plate; the radial shifting lever is driven by the central rotating shaft to perform radial extension and contraction; the roller assembly is driven by the central pressure plate to perform radial movement. The radial shifting lever and the roller assembly of the extracorporeal circulation pumping system can be extended and retracted, which is convenient for disassembling and assembling the soft pipeline; the extracorporeal circulation pumping system can also synchronously adjust all radial shifting levers and two roller assemblies; and the operation is simple, and only the central rotating shaft needs to be rotated.

Description

Technical Field

[0001] The present application relates to the technical field of blood separation equipment, and in particular to an extracorporeal circulation pumping system. Background Art

[0002] A blood separator is a device that separates the components of collected human blood. Its principle is to centrifuge the blood bag in the circulation pipeline. The power source for the circulation of blood in the above-mentioned circulation pipeline comes from the circulation pumping system. The system mainly uses a peristaltic pump as the main structure to drive the blood to flow in the circulation pipeline. The core components of the peristaltic pump include a driver, a pump head and a hose. The fluid only flows in the hose and does not contact other parts of the pump body. Therefore, it has the characteristics of pollution-free transmission, high-precision control, low shear force and easy maintenance. The blood separator usually uses a peristaltic pump as the power source for fluid operation, and because the hoses used for blood separation are all disposable hoses, the peristaltic pump hose is frequently disassembled and assembled. It is necessary to design a peristaltic pump that can be easily disassembled and assembled and can effectively prevent the hose from falling out during operation. Summary of the invention

[0003] An extracorporeal circulation pumping system comprises at least a motor, a rotary assembly driven to rotate by the motor, an extrusion arc wall wrapped around the rotary assembly, and a soft pipeline arranged between the extrusion arc wall and the rotary assembly, and further comprises:

[0004] The rotary assembly includes a rotary housing, a central assembly, a radial shifting stopper, and a roller assembly:

[0005] The rotary shell includes a shell main part, a central chamber arranged at the center of the upper end surface of the shell main part, radial chambers uniformly distributed circumferentially on the outer periphery of the shell main part and connected to the central chamber, and a translation chamber arranged in the lower half of the shell main part; the shell main part includes a cylindrical base, a transmission key arranged on the lower end surface of the cylindrical base for transmission connection to the motor; the central chamber includes a central longitudinal rod arranged in the middle of the upper end surface of the cylindrical base, a central blind hole arranged in the middle of the central longitudinal rod, a fixed gear ring arranged in the upper half of the inner wall of the central blind hole, and a stop convex ring arranged in the middle of the inner wall of the central blind hole. , a lower hole of the longitudinal hole arranged on the lower end face of the central blind hole; the radial chamber comprises a radial wide hole arranged radially in the cylindrical base and connected with the lower half of the central blind hole, a limiting inner ring formed on the inner side of the radial wide hole, a radial narrow hole arranged on the outer side of the radial wide hole, and a rotation-stopping connecting rod arranged on the inner wall of the radial narrow hole; the translation chamber comprises a translation through hole arranged transversely through the cylindrical base and connected with the lower hole of the longitudinal hole, a rectangular partition arranged in the middle of the lower end face of the translation through hole, a horizontal guide rod is respectively arranged on the left and right upper faces of the rectangular partition, and a rod inner longitudinal hole is arranged in the horizontal guide rod;

[0006] The central component includes a central rotating shaft rotatably arranged in the central chamber, and a central pressure plate slidably arranged in the translation chamber; the central rotating shaft includes a cylindrical core shaft, an axial wall ring groove formed on the outer wall of the cylindrical core shaft and rotatably matched with the stop convex ring, an active bevel gear formed at the lower end of the cylindrical core shaft, a spindle screw formed at the lower end of the active bevel gear and arranged through the lower hole of the longitudinal hole, and a rectangular upper rod arranged at the upper end of the cylindrical core shaft. The central rotating shaft also includes an unlocking pressure column slidably inserted into the fixed gear ring, and a rectangular upper rod arranged at the lower end of the unlocking pressure column and plugged into the rectangular upper rod. A sleeve hole, a return compression spring arranged in the rectangular sleeve hole above the rectangular upper rod, a sliding gear ring formed at the lower end of the outer wall of the unlocking pressure column and locked with the fixed gear ring; the central pressure plate includes a rectangular pressure plate base, a rectangular lower groove arranged below the pressure plate base for accommodating a rectangular partition, a pressure plate through hole that passes through the pressure plate base in the horizontal direction and accommodates a horizontal guide rod, and a pressure plate screw hole arranged above the pressure plate base and screwed to the main shaft screw. An upper inclined block is respectively provided on the left and right sides of the upper half of the pressure plate base, and a lower inclined block is respectively provided on the left and right sides of the lower half of the pressure plate base.

[0007] The radial shifting stopper rod corresponds to the radial chamber one by one, and the radial shifting stopper rod is driven by the central rotating shaft to perform radial expansion and contraction; the radial shifting stopper rod comprises an internal threaded barrel rotatably arranged in the radial wide hole, an inner ring circular shaft arranged inside the internal threaded barrel and passing through the limiting inner ring, a driven bevel gear arranged inside the inner ring circular shaft and meshing with the driving bevel gear, a radial shifting screw rod screwed in the internal threaded barrel, and a rotation-stopping longitudinal hole formed in the radial shifting screw rod and plugged with the rotation-stopping connecting rod;

[0008] The roller assemblies are provided with two, and a roller assembly is respectively provided on the left and right sides of the translation chamber, and the roller assembly is driven by the central pressure plate to move radially. The roller assembly comprises a roller base slidably arranged in the translation through hole, a roller side cavity arranged outside the roller base, a roller core shaft arranged in the roller side cavity, a roller body rotatably arranged on the roller core shaft for squeezing the soft pipeline, an upper pressure surface arranged above the inner side of the roller base and cooperating with the upper inclined block, a lower pressure surface arranged below the inner side of the roller base and cooperating with the lower inclined block, and a retraction sleeve arranged in the middle part of the inner side of the roller base, the retraction sleeve passes through the through hole of the pressure plate and is sleeved on the corresponding transverse guide rod, the inner wall of the retraction sleeve is also provided with a spring baffle arranged through the transverse guide rod, and the longitudinal hole in the rod is also provided with a retraction compression spring that drives the spring baffle to move inward.

[0009] Furthermore, there are at least three radial shift blocking rods.

[0010] Furthermore, six radial shift blocking rods are provided.

[0011] Beneficial effects:

[0012] In the extracorporeal circulation pumping system described in this case, the radial shifting stopper rod and the roller assembly can be extended and retracted, so as to facilitate the placement of the soft pipeline into the arc space between the rotating assembly and the extrusion arc wall.

[0013] The extracorporeal circulation pumping system described in this case can synchronously adjust all radial shifting bars and two roller assemblies, and the operation is simple, and only the central rotating shaft needs to be rotated:

[0014] First, the synchronous extension and retraction of all radial shifting bars:

[0015] The unlocking pressure column and the rectangular sleeve hole are rotated to drive the rectangular upper rod and the active bevel gear to rotate; the active bevel gear rotates to drive the driven bevel gear and the internal threaded cylinder to rotate, and the internal threaded cylinder drives the radial displacement screw to extend and retract;

[0016] Then, the roller assembly and the radial shift stopper extend and retract simultaneously:

[0017] The spindle screw acts on the screw hole of the pressure plate, thereby driving the central pressure plate to move upward as a whole, and the retraction spring acts on the spring baffle to drive the roller assembly to extend and retract.

[0018] In the case of an extracorporeal circulation pumping system, the central rotating shaft has a self-locking function to avoid accidental touch:

[0019] The unlocking pressure column and the sliding gear ring are pressed downward to overcome the damping of the return compression spring and move downward, and the sliding gear ring is disengaged from the fixed gear ring, and the rotational freedom of the central rotating shaft is unlocked. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of an embodiment of the extracorporeal circulation pumping system.

[0021] Figure 2 It is a top view of an embodiment of the extracorporeal circulation pumping system.

[0022] Figure 3 It is a schematic diagram of an embodiment of the rotary assembly.

[0023] Figure 4 It is a schematic diagram of an embodiment of the rotary assembly.

[0024] Figure 5 It is a cross-sectional view of the rotary assembly in the first state.

[0025] Figure 6 It is a cross-sectional view of the rotary assembly in the second state.

[0026] Figure 7 It is a cross-sectional view of an embodiment of the rotary shell.

[0027] Figure 8 yes Figure 5 Enlarged schematic diagram of part A in the middle.

[0028] Fig. 9 yes Figure 6 Enlarged schematic diagram of part B in the middle.

[0029] Fig.10 Schematic diagram of one embodiment of a central pressure plate.

[0030] In the figure:

[0031] 9. Motor;

[0032] 8. Rotation assembly;

[0033] 7. Extrusion arc wall;

[0034] 6. Soft pipes;

[0035] 1. Rotating housing;

[0036] 11. Shell main part, 111. Cylindrical base, 112. Transmission key;

[0037] 12. Central chamber, 121. Central longitudinal rod, 122. Central blind hole, 123. Fixed gear ring, 124. Stop convex ring, 125. Lower hole of the longitudinal hole;

[0038] 13. radial chamber, 131. radial wide hole, 132. limiting inner ring, 133. radial narrow hole, 134. anti-rotation connecting rod;

[0039] 14. Translation chamber, 141. Translation through hole, 142. Rectangular partition, 143. Horizontal guide rod, 144. Vertical hole in the rod;

[0040] 2. Central components;

[0041] 21. Central rotating shaft, 211. Cylindrical mandrel, 212. Shaft wall ring groove, 213. Driving bevel gear, 214. Spindle screw, 215. Rectangular upper rod, 216. Unlocking pressure column, 217. Rectangular sleeve hole, 218. Reset compression spring, 219. Sliding gear ring;

[0042] 22. Central pressing plate, 221. Pressing plate base, 222. Rectangular lower groove, 223. Pressing plate through hole, 224. Pressing plate screw hole, 225. Upper tilting block, 226. Lower tilting block;

[0043] 3. Radial shift stop rod, 31. Internal threaded cylinder, 32. Inner circular shaft, 33. Driven bevel gear, 34. Radial shift screw, 35. Anti-rotation longitudinal hole,

[0044] 4. Roller assembly, 41. Roller base, 42. Roller side cavity, 43. Roller core shaft, 44. Roller body, 45. Upper pressure surface, 46. Lower pressure surface, 47. Retraction sleeve, 48. Spring baffle, 49. Retraction compression spring. DETAILED DESCRIPTION

[0045] An extracorporeal circulation pumping system at least includes a motor 9, a rotary assembly 8 driven to rotate by the motor 9, an extrusion arc wall 7 wrapped around the rotary assembly 8, and a soft pipe 6 arranged between the extrusion arc wall 7 and the rotary assembly 8. The rotary assembly 8 includes a rotary shell 1, a central component 2, a radial shift stop rod 3, and a roller assembly 4.

[0046] The rotary shell 1 includes a shell main part 11, a central chamber 12 arranged at the center of the upper end surface of the shell main part 11, radial chambers 13 circumferentially evenly distributed on the outer periphery of the shell main part 11 and connected to the central chamber 12, and a translation chamber 14 arranged in the lower half of the shell main part 11; the shell main part 11 includes a cylindrical base 111, a transmission key 112 arranged on the lower end surface of the cylindrical base 111 for transmission connection to the motor 9; the central chamber 12 includes a central longitudinal rod 121 arranged in the middle of the upper end surface of the cylindrical base 111, a central blind hole 122 arranged in the middle of the central longitudinal rod 121, a fixed gear ring 123 arranged in the upper half of the inner wall of the central blind hole 122, a stop convex ring 124 arranged in the middle of the inner wall of the central blind hole 122, and a stop convex ring 125 arranged in the middle of the inner wall of the central blind hole 122. The longitudinal hole lower hole 125 is arranged at the lower end face of the central blind hole 122; the radial chamber 13 includes a radial wide hole 131 arranged radially in the cylindrical base 111 and connected with the lower half of the central blind hole 122, a limiting inner ring 132 formed on the inner side of the radial wide hole 131, a radial narrow hole 133 arranged on the outer side of the radial wide hole 131, and a rotation-stopping connecting rod 134 arranged on the inner wall of the radial narrow hole 133; the translation chamber 14 includes a translation through hole 141 arranged transversely through the cylindrical base 111 and connected with the longitudinal hole lower hole 125, and a rectangular partition 142 arranged in the middle of the lower end face of the translation through hole 141, and a horizontal guide rod 143 is respectively arranged on the left and right upper end faces of the rectangular partition 142, and a rod inner longitudinal hole 144 is arranged in the horizontal guide rod 143.

[0047] The central component 2 includes a central rotating shaft 21 rotatably arranged in the central chamber 12, and a central pressure plate 22 slidably arranged in the translation chamber 14; the central rotating shaft 21 includes a cylindrical core shaft 211, an axial wall ring groove 212 formed on the outer wall of the cylindrical core shaft 211 and rotatably matched with the stop convex ring 124, an active bevel gear 213 formed at the lower end of the cylindrical core shaft 211, a spindle screw 214 formed at the lower end of the active bevel gear 213 and passing through the lower hole 125 of the longitudinal hole, and a rectangular upper rod 215 arranged at the upper end of the cylindrical core shaft 211. The central rotating shaft 21 also includes an unlocking pressure column 216 slidably inserted into the fixed gear ring 123, and a rectangular sleeve hole 21 provided at the lower end of the unlocking pressure column 216 and plugged with the rectangular upper rod 215. 7. A return compression spring 218 is arranged in the rectangular sleeve hole 217 above the rectangular upper rod 215, and a sliding gear ring 219 is formed at the lower end of the outer wall of the unlocking pressure column 216 and locked with the fixed gear ring 123; the central pressure plate 22 includes a rectangular pressure plate base 221, a rectangular lower groove 222 arranged below the pressure plate base 221 to accommodate the rectangular partition 142, a pressure plate through hole 223 that passes through the pressure plate base 221 horizontally and accommodates the horizontal guide rod 143, and a pressure plate screw hole 224 that is arranged above the pressure plate base 221 and screwed to the spindle screw 214, an upper inclined block 225 is respectively provided on the left and right sides of the upper half of the pressure plate base 221, and a lower inclined block 226 is respectively provided on the left and right sides of the lower half of the pressure plate base 221.

[0048] The radial shifting stopper rod 3 corresponds one to one with the radial chamber 13, and the radial shifting stopper rod 3 is driven by the central rotating shaft 21 to perform radial extension and contraction; the radial shifting stopper rod 3 includes an internal threaded tube 31 rotatably arranged in the radial wide hole 131, an inner circular shaft 32 arranged on the inner side of the internal threaded tube 31 and passing through the limiting inner ring 132, a driven bevel gear 33 arranged on the inner side of the inner circular shaft 32 and meshing with the active bevel gear 213, a radial shifting screw 34 screwed in the internal threaded tube 31, and a rotation-stopping longitudinal hole 35 formed in the radial shifting screw 34 and plugged with the rotation-stopping connecting rod 134.

[0049] The roller assemblies 4 are provided with two, and one roller assembly 4 is provided on the left and right sides of the translation chamber 14 respectively. The roller assembly 4 is driven by the central pressure plate 22 to move radially. The roller assembly 4 includes a roller base 41 slidably arranged in the translation through hole 141, a roller side cavity 42 arranged outside the roller base 41, a roller core shaft 43 arranged in the roller side cavity 42, a roller body 44 rotatably arranged on the roller core shaft 43 for squeezing the soft pipe 6, and a roller body 44 arranged above the inner side of the roller base 41. An upper pressure surface 45 cooperates with the upper inclined block 225, a lower pressure surface 46 is arranged at the lower inner side of the roller base 41 and cooperates with the lower inclined block 226, and a retraction sleeve 47 is arranged at the middle part of the inner side of the roller base 41. The retraction sleeve 47 passes through the pressure plate through hole 223 and is sleeved on the corresponding transverse guide rod 143. The inner wall of the retraction sleeve 47 is also provided with a spring baffle 48 arranged through the transverse guide rod 143, and the longitudinal hole 144 in the rod is also provided with a retraction compression spring 49 for driving the spring baffle 48 to move inward.

[0050] Furthermore, at least three radial shift blocking rods 3 are provided.

[0051] Furthermore, six radial shift blocking rods 3 are provided.

[0052] The extracorporeal circulation pumping system described in this case can adjust the two roller assemblies 4 and the radial shift stop rod 3 to retract and extend so as to place the soft pipeline 6.

[0053] Step 1, retraction:

[0054] Step 1.1, unlock the rotational freedom of the central shaft 21:

[0055] Press down the unlocking pressure column 216 and the sliding gear ring 219 to overcome the damping of the return compression spring 218 and move downward, the sliding gear ring 219 is disengaged from the fixed gear ring 123, and the rotational freedom of the central rotating shaft 21 is unlocked;

[0056] Step 1.2, retraction of radial shift stop rod 3:

[0057] The unlocking pressure column 216 and the rectangular sleeve hole 217 are rotated to drive the rectangular upper rod 215 and the active bevel gear 213 to rotate;

[0058] The active bevel gear 213 drives the driven bevel gear 33 and the internal threaded cylinder 31 to rotate, and the internal threaded cylinder 31 drives the radial displacement screw 34 to retract;

[0059] Step 1.3, retracting the roller assembly 4:

[0060] The spindle screw 214 acts on the pressure plate screw hole 224, thereby driving the central pressure plate 22 to move upward as a whole;

[0061] The retraction compression spring 49 acts on the spring baffle 48 to drive the roller assembly 4 to retract as a whole;

[0062] Step 1.4, central axis 21 degrees of freedom locking:

[0063] The unlocking pressure column 216 is no longer pressed, and the sliding gear ring 219 moves upward to contact the active bevel gear 213, locking the rotational freedom of the central shaft 21.

[0064] Step 2, placing soft pipe 6:

[0065] The soft pipe 6 is placed in the arc-shaped gap between the extrusion arc wall 7 and the rotary assembly 8.

[0066] Step 3, stretch out:

[0067] Step 3.1, unlocking the rotational freedom of the central shaft 21, same as step 1.1;

[0068] Step 3.2, radial shift stop rod 3 extends:

[0069] Rotate the unlocking pressure column 216 and the rectangular sleeve hole 217 in the opposite direction to that in step 1.2, so that the radial displacement screw 34 extends outward. The radial displacement screw 34 is used to block the space above the soft pipe 6 to prevent it from slipping out upwards.

[0070] Step 3.3, roller assembly 4 extends:

[0071] The spindle screw 214 rotates in the opposite direction to that in step 1.3, and the central pressing plate 22 moves downward as a whole;

[0072] The upper inclined block 225 acts on the upper pressure surface 45, and the lower inclined block 226 acts on the lower pressure surface 46, thereby driving the roller assembly 4 to overcome the damping of the spring baffle 48 and extend outward, and the roller assembly 4 cooperates with the extrusion arc wall 7 to extrude the soft pipe 6;

[0073] Step 3.4, the central shaft 21 degrees of freedom are locked, same as step 1.4.

Claims

1. An extracorporeal circulation pumping system for a blood separator, comprising at least a motor (9), a rotary assembly (8) driven to rotate by the motor (9), an extrusion arc wall (7) wrapped around the rotary assembly (8), and a soft pipeline (6) arranged between the extrusion arc wall (7) and the rotary assembly (8), characterized in that: The rotary assembly (8) comprises: A rotary housing (1) comprises a housing main portion (11), a central chamber (12) arranged at the centre of an upper end surface of the housing main portion (11), radial chambers (13) uniformly distributed in the circumferential direction on the outer circumference of the housing main portion (11) and connected to the central chamber (12), and a translation chamber (14) arranged at the lower half of the housing main portion (11); A central component (2) comprising a central rotating shaft (21) rotatably disposed in the central chamber (12) and a central pressing plate (22) slidably disposed in the translation chamber (14); A radial shifting blocking rod (3) corresponding one to one with the radial chamber (13), the radial shifting blocking rod (3) being driven by a central rotating shaft (21) to perform radial expansion and contraction; Two roller assemblies (4) are provided, one roller assembly (4) being provided on the left and right sides of the translation chamber (14), respectively, and the roller assemblies (4) are driven by the central pressure plate (22) to move radially; The housing main part (11) comprises a cylindrical base (111) and a transmission key (112) provided on the lower end surface of the cylindrical base (111) for transmission connection with the motor (9); The central chamber (12) comprises a central longitudinal rod (121) provided in the middle of the upper end surface of the cylindrical base (111), a central blind hole (122) provided in the middle of the central longitudinal rod (121), a fixed tooth ring (123) provided in the upper half of the inner wall of the central blind hole (122), a stop convex ring (124) provided in the middle of the inner wall of the central blind hole (122), and a longitudinal hole lower hole (125) provided in the lower end surface of the central blind hole (122); The radial chamber (13) comprises a radial wide hole (131) radially arranged in the cylindrical base (111) and communicating with the lower half of the central blind hole (122), a limiting inner ring (132) formed on the inner side of the radial wide hole (131), a radial narrow hole (133) arranged on the outer side of the radial wide hole (131), and a rotation-stopping connecting rod (134) arranged on the inner wall of the radial narrow hole (133); The translation chamber (14) comprises a translation through hole (141) which passes through the cylindrical base (111) in the transverse direction and is connected to the lower hole (125) of the longitudinal hole, and a rectangular partition (142) which is arranged in the middle of the lower end surface of the translation through hole (141). A transverse guide rod (143) is respectively arranged on the left and right of the upper end surface of the rectangular partition (142), and an inner longitudinal hole (144) is arranged in the transverse guide rod (143); The central rotating shaft (21) comprises a cylindrical core shaft (211), a shaft wall annular groove (212) formed on the outer wall of the cylindrical core shaft (211) and rotatably engaged with the stop convex ring (124), a driving bevel gear (213) formed on the lower end of the cylindrical core shaft (211), a main shaft screw (214) formed on the lower end of the driving bevel gear (213) and passing through the lower hole (125) of the longitudinal hole, and a rectangular upper rod (215) provided on the upper end of the cylindrical core shaft (211). The shaft (21) further comprises an unlocking pressure column (216) slidably inserted into the fixed toothed ring (123), a rectangular sleeve hole (217) provided at the lower end of the unlocking pressure column (216) and plugged into the rectangular upper rod (215), a return pressure spring (218) provided in the rectangular sleeve hole (217) above the rectangular upper rod (215), and a sliding toothed ring (219) formed at the lower end of the outer wall of the unlocking pressure column (216) and locked with the fixed toothed ring (123); The central pressing plate (22) comprises a rectangular pressing plate base (221), a rectangular lower groove (222) provided below the pressing plate base (221) for accommodating a rectangular partition (142), a pressing plate through hole (223) penetrating the pressing plate base (221) in the transverse direction and accommodating a transverse guide rod (143), and a pressing plate screw hole (224) provided above the pressing plate base (221) and screwed to the main shaft screw (214), an upper tilting block (225) is provided on the left and right sides of the upper half of the pressing plate base (221), and a lower tilting block (226) is provided on the left and right sides of the lower half of the pressing plate base (221); The radial shift stop rod (3) comprises an internal threaded barrel (31) rotatably arranged in the radial wide hole (131), an inner circular shaft (32) arranged inside the internal threaded barrel (31) and passing through the limiting inner ring (132), a driven bevel gear (33) arranged inside the inner circular shaft (32) and meshing with the driving bevel gear (213), a radial shift screw (34) screwed in the internal threaded barrel (31), and a rotation-stopping longitudinal hole (35) formed in the radial shift screw (34) and plug-fitting with the rotation-stopping connecting rod (134); The roller assembly (4) comprises a roller base (41) slidably disposed in the translation through hole (141), a roller side cavity (42) disposed outside the roller base (41), a roller core shaft (43) disposed in the roller side cavity (42), a roller body (44) rotatably disposed on the roller core shaft (43) for squeezing the soft pipe (6), an upper pressure surface (45) disposed above the inner side of the roller base (41) and cooperating with the upper tilting block (225), and a roller core shaft (43) disposed in the roller base (41). A lower pressure surface (46) is provided at the lower side and cooperates with the lower inclined block (226), and a retraction sleeve (47) is provided at the middle of the inner side of the roller base (41). The retraction sleeve (47) passes through the pressure plate through hole (223) and is sleeved on the corresponding transverse guide rod (143). The inner wall of the retraction sleeve (47) is also provided with a spring baffle (48) that passes through the transverse guide rod (143). A retraction compression spring (49) that drives the spring baffle (48) to move inward is also provided in the longitudinal hole (144) in the rod.

2. The extracorporeal circulation pumping system for a blood separator according to claim 1, characterized in that: At least three radial shift blocking rods (3) are provided.

3. The extracorporeal circulation pumping system for a blood separator according to claim 2, characterized in that: The radial shift blocking rods (3) are provided with six in number.

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