Low-pulsation high-capacity external rotation multi-pipe parallel peristaltic pump

Abstract

The utility model discloses a low-pulsation high-capacity external rotation multi-pipe parallel peristaltic pump. A driving mechanism, a roller rotating mechanism and a pipeline mechanism are arranged on a mounting bedplate; the pipeline mechanism comprises an extrusion sleeve, inlet and outlet liquid distribution pipes and hoses, the liquid distribution pipes are arranged in the extrusion sleeve in the vertical direction, the multiple hoses are arranged on the outer side of the extrusion sleeve in parallel and at equal intervals in the vertical direction, and the two ends of each hose are connected with the liquid distribution pipes respectively; the roller rotating mechanism is positioned outside the hose and is connected with the driving mechanism; the driving mechanism drives the roller rotating mechanism to rotate and extrude the hoses, the single-pipe-multi-pipe-single-pipe fluid conveying process is achieved, continuous and uniform time differences exist when all the hoses are extruded and loosened, and continuous low-pulse fluid conveying is achieved. The peristaltic pump has the advantages of being low in abrasion loss of the inner wall of the hose and high in continuous filling precision, pulsation during fluid transmission is reduced, and the problems that in an existing peristaltic pump, due to the fact that the inner wall of the hose is seriously abraded, a large number of particles are generated, fluid is polluted, and the continuous filling precision is low are solved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of fluid filling pump, concretely relates to a low pulsation large capacity outer rotation multi -tube parallel peristaltic pump. BACKGROUND

[0002] Peristaltic pump is a liquid delivery device that can control flow rate, and peristaltic pump is a device that uses a rotating roller to roll and press a flexible hose, and the fluid in the hose moves with the rotation of the roller, just like squeezing the hose with two fingers, and the liquid flows with the movement of the fingers.

[0003] The existing peristaltic pump relies on the roller assembly with a rotating device to rotate and press the hose to discharge the fluid, and for the same hose, the roller squeezes or rolls the hose at the same position every time it is filled, which causes the inner wall of the hose to be severely worn and a large number of particles to be generated, resulting in contamination of the fluid.

[0004] The existing peristaltic pump relies on the number of turns or the angle of the roller assembly to control the rolling and extrusion of the fluid. For each filling, the initial position and the end position of the roller assembly rolling the hose will not be at the same position due to the number of turns or the angle accumulation, and the elastic recovery of the hose at different positions also has differences, so that the continuous filling accuracy of the traditional peristaltic pump is difficult to achieve the expected effect. SUMMARY

[0005] The utility model solves the technical problems of effectively reducing the pulsation of the existing peristaltic pump during fluid transmission, and solving the problems of severe wear of the inner wall of the hose, easy generation of a large number of particles, resulting in contamination of the fluid, and low continuous filling accuracy, and provides a low pulsation large capacity outer rotation multi -tube parallel peristaltic pump with compact structure, convenient disassembly and assembly, high reliability, low wear of the inner wall of the hose, high continuous filling accuracy and low cost.

[0006] To solve the above technical problems, the utility model adopts the following technical solutions:

[0007] The utility model provides a kind of low pulsation large capacity outer rotation multi-tube parallel peristaltic pump, including installation platform, which is equipped with pump cover, driving mechanism, gyro wheel rotating mechanism and pipeline mechanism on the installation platform, and the gyro wheel rotating mechanism and pipeline mechanism are located in pump cover;The pipeline mechanism includes extrusion sleeve, liquid inlet branch pipe, liquid outlet branch pipe and several elastic hoses, the liquid inlet branch pipe and liquid outlet branch pipe are arranged in the inside of extrusion sleeve along vertical direction, several elastic hoses are arranged in the outside of extrusion sleeve along vertical direction in parallel and equidistant, and the two ends of elastic hose are connected with liquid inlet branch pipe and liquid outlet branch pipe respectively;The gyro wheel rotating mechanism is located in the outside of elastic hose and is connected with the output end of driving mechanism;Under the driving of driving mechanism, gyro wheel rotating mechanism rotates, and extrudes the elastic hose that is uniformly distributed along vertical direction, drives fluid to flow from the inlet of liquid inlet branch pipe, transports to the outlet of liquid outlet branch pipe, realizes the fluid transport process from single tube→multi-tube→single tube, and there is continuous, uniform time difference, i. e. phase difference, when each elastic hose is extruded and loosened, so as to realize low pulsation fluid transport continuously.

[0008] As a further improvement of the utility model, the gyro wheel rotating mechanism comprises: an end cover, an upper taper sleeve, a lower bearing seat, a gyro wheel assembly and an upper bearing seat; the lower bearing seat is rotatably arranged on the installation platform by a third deep groove ball bearing and is connected with the output end of the driving mechanism; the gyro wheel assembly is arranged along the vertical direction, one end of the gyro wheel assembly is connected with the lower bearing seat, and the other end of the gyro wheel assembly is connected with the upper bearing seat; the upper taper sleeve is nested on the outside of the top of the extrusion sleeve and is rotatably connected with the upper bearing seat by a first deep groove ball bearing, and an end cover is arranged between the upper taper sleeve, the upper bearing seat and the extrusion sleeve to limit the displacement of the upper taper sleeve and the upper bearing seat; under the driving of the driving mechanism, the lower bearing seat drives the gyro wheel assembly and the upper bearing seat to rotate.

[0009] As a further improvement of the utility model, the gyro wheel assembly comprises: a gyro wheel shaft, an elastic retaining ring for shaft, a second deep groove ball bearing and a gyro wheel; the two ends of the gyro wheel shaft are respectively connected and fixed with the lower bearing seat and the upper bearing seat, the gyro wheel is nested on the outer periphery of the gyro wheel shaft, and the two ends of the gyro wheel are respectively provided with the elastic retaining ring for shaft and the second deep groove ball bearing at the connection positions with the gyro wheel shaft, so as to realize the rotation and rolling of the gyro wheel while extruding the elastic hose.

[0010] As a further improvement of the utility model, a plurality of gyro wheel assemblies are uniformly distributed between the lower bearing seat and the upper bearing seat along the circumferential direction, and the circumferential included angle between adjacent gyro wheel assemblies is β; a plurality of avoiding notches are arranged on the extrusion sleeve along the circumferential direction, the adjacent intervals of the avoiding notches are offset by an angle difference of β / (n-1), and the circular arc length of the avoiding notches is β, so as to realize the rotation and extrusion and loosening of each elastic hose along the β circular arc length in the circumferential direction; wherein n is the number of elastic hoses arranged on the outside of the extrusion sleeve.

[0011] As a further improvement of the utility model, when the roller extrudes the elastic hose, the outer side of the extrusion sleeve abuts against the elastic hose, so that the distance h between the upper layer of the tube wall and the lower layer of the tube wall of the elastic hose is kept as 2x(70%~90%)t, t is the thickness of the tube wall of the elastic hose, mm.

[0012] As a further improvement of the utility model, the pipeline mechanism further comprises a fourth deep groove ball bearing, a lower cone sleeve and a support seat; the support seat is rotationally connected with the lower bearing seat through the fourth deep groove ball bearing, and the lower cone sleeve is arranged between the support seat and the fourth deep groove ball bearing to realize installation and fixation of the support seat; and the bottom of the extrusion sleeve is fixedly connected with the support seat.

[0013] As a further improvement of the utility model, the pump sleeve comprises a pressing plate and a support plate, the support plate is arranged on the installation table plate in the vertical direction, the pressing plate is arranged on the top of the support plate in the horizontal direction, and the top of the extrusion sleeve is fixedly connected with the pressing plate.

[0014] As a further improvement of the utility model, the liquid inlet and liquid outlet distribution pipes are each provided with a plurality of pipe joints in the vertical direction.

[0015] As a further improvement of the utility model, the driving mechanism comprises a speed reducer, a driving assembly and an external PLC controller; the driving assembly is installed on the installation table plate, and the output end of the driving assembly is connected with the roller rotating mechanism through the speed reducer; the driving assembly and the PLC controller are electrically connected, and the PLC controller controls the driving assembly to operate.

[0016] As a further improvement of the utility model, the driving assembly adopts a stepping motor or a servo motor or a motor driving unit.

[0017] Compared with the prior art, the utility model has the advantages that:

[0018] This utility model discloses a low-pulsation, large-capacity, externally rotating, multi-tube parallel peristaltic pump. The pump, drive mechanism, roller rotation mechanism, and piping mechanism are mounted on a platform. The roller rotation mechanism and piping mechanism are both located within the pump sleeve, forming the main structure of the peristaltic pump. Specifically, the piping mechanism includes a compression sleeve, an inlet and outlet distribution pipe, and several flexible hoses. The inlet and outlet distribution pipes are vertically positioned inside the compression sleeve, while the flexible hoses are arranged parallel and equidistantly on the outside of the compression sleeve, with both ends connected to the inlet and outlet distribution pipes respectively, effectively reducing the overall installation volume of the peristaltic pump. The roller rotation mechanism is located outside the flexible hoses and connected to the output end of the drive mechanism. The system utilizes a drive mechanism to rotate a roller mechanism. As the roller mechanism rotates, it compresses vertically distributed elastic hoses, causing fluid to flow in from the inlet of the liquid inlet pipe and be transported to the outlet pipe. This achieves a fluid transport process from single-pipe to multi-pipe and back to single-pipe. Furthermore, the continuous and uniform time difference (phase difference) between the compression and release of each elastic hose ensures continuous, low-pulsation fluid transport. This minimizes wear on the elastic hoses caused by the roller mechanism, avoids the risk of fluid contamination due to severe wear on the inner wall of the hoses and the generation of a large number of particles, and effectively extends the service life of the pump pipe. Because the elastic hoses are always under compression during the rotation of the roller mechanism, it also achieves the goal of high-precision, large-capacity continuous filling. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the main structural principle of a low-pulsation, high-capacity external rotating multi-tube parallel peristaltic pump in a specific embodiment of this utility model.

[0020] Figure 2 This is a top view schematic diagram of the low-pulsation, high-capacity, externally rotating, multi-tube parallel peristaltic pump in a specific embodiment of this utility model.

[0021] Figure 3 This is a schematic diagram of the left-side structure of a low-pulsation, high-capacity, externally rotating, multi-tube parallel peristaltic pump in a specific embodiment of this utility model.

[0022] Figure 4 for Figure 1 A schematic diagram of the structural principle of the cross-section along the AA direction.

[0023] Figure 5 for Figure 1 A schematic diagram of the structural principle of the cross-section along the BB direction.

[0024] Figure 6 This is a schematic diagram of the three-dimensional isometric structure of the low-pulsation, high-capacity external rotating multi-tube parallel peristaltic pump in a specific embodiment of this utility model.

[0025] Figure 7The utility model discloses a three-dimensional axonometric structure principle schematic diagram of pipeline mechanism in the specific embodiment.

[0026] Legend: 1, extrusion sleeve; 2, end cover; 3, upper cone sleeve; 4, first deep groove ball bearing; 5, pressing plate; 6, roller shaft; 7, elastic baffle ring for shaft; 8, second deep groove ball bearing; 9, roller; 10, support plate; 11, lower bearing seat; 12, waterproof baffle ring; 13, O-shaped sealing ring; 14, mounting platform; 15, speed reducer; 16, driving assembly; 17, third deep groove ball bearing; 18, fourth deep groove ball bearing; 19, lower cone sleeve; 20, support seat; 21, liquid inlet distribution pipe; 22, elastic hose; 23, upper bearing seat; 24, liquid outlet distribution pipe; 25, elastic baffle ring for hole; 26, pipe joint; 27, avoidance notch. DETAILED DESCRIPTION

[0027] The utility model will be further described below in connection with the drawings and specific preferred embodiments, but it is not therefore to limit the protection scope of the utility model.

[0028] In the description of the utility model, it is understood that the orientation or positional relationship indicated by the terms "side", "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model.

[0029] In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features, so that the features limited by "first" and "second" can explicitly or implicitly include one or more features, and in the description of the utility model, the meaning of "multiple" is two or more, unless otherwise explicitly specified.

[0030] Embodiment

[0031] As Figure 1 , Figure 2 , Figure 3 And Figure 6As shown in the utility model discloses a low pulsation large capacity outer rotation multi-tube parallel peristaltic pump, including installation platform plate 14, be equipped with pump cover, drive mechanism, gyro wheel rotating mechanism and pipeline mechanism on installation platform plate 14.Pump cover includes pressing plate 5 and support plate 10, support plate 10 is set on installation platform plate 14 along vertical direction, pressing plate 5 is set on the top of support plate 10 along horizontal direction, and gyro wheel rotating mechanism and pipeline mechanism are all located in pump cover. Figure 7 As shown in the utility model discloses a low pulsation large capacity outer rotation multi-tube parallel peristaltic pump, including installation platform plate 14, be equipped with pump cover, drive mechanism, gyro wheel rotating mechanism and pipeline mechanism on installation platform plate 14.Pump cover includes pressing plate 5 and support plate 10, support plate 10 is set on installation platform plate 14 along vertical direction, pressing plate 5 is set on the top of support plate 10 along horizontal direction, and gyro wheel rotating mechanism and pipeline mechanism are all located in pump cover.

[0032] As shown in the utility model discloses a low pulsation large capacity outer rotation multi-tube parallel peristaltic pump, including installation platform plate 14, be equipped with pump cover, drive mechanism, gyro wheel rotating mechanism and pipeline mechanism on installation platform plate 14.Pump cover includes pressing plate 5 and support plate 10, support plate 10 is set on installation platform plate 14 along vertical direction, pressing plate 5 is set on the top of support plate 10 along horizontal direction, and gyro wheel rotating mechanism and pipeline mechanism are all located in pump cover. Figure 1 、 Figure 4 and Figure 5 As shown in the utility model discloses a low pulsation large capacity outer rotation multi-tube parallel peristaltic pump, including installation platform plate 14, be equipped with pump cover, drive mechanism, gyro wheel rotating mechanism and pipeline mechanism on installation platform plate 14.Pump cover includes pressing plate 5 and support plate 10, support plate 10 is set on installation platform plate 14 along vertical direction, pressing plate 5 is set on the top of support plate 10 along horizontal direction, and gyro wheel rotating mechanism and pipeline mechanism are all located in pump cover.

[0033] As shown in the utility model discloses a low pulsation large capacity outer rotation multi-tube parallel peristaltic pump, including installation platform plate 14, be equipped with pump cover, drive mechanism, gyro wheel rotating mechanism and pipeline mechanism on installation platform plate 14.Pump cover includes pressing plate 5 and support plate 10, support plate 10 is set on installation platform plate 14 along vertical direction, pressing plate 5 is set on the top of support plate 10 along horizontal direction, and gyro wheel rotating mechanism and pipeline mechanism are all located in pump cover. Figure 5 and Figure 6As shown, the roller assembly is arranged in a vertical direction, one end of the roller assembly is connected with the lower bearing seat 11, and the other end of the roller assembly is connected with the upper bearing seat 23; that is, the roller assembly simultaneously extrudes multiple groups of elastic hoses 12 in the vertical direction. The upper cone sleeve 3 is nested on the top outer side of the extrusion sleeve 1 and is rotatably connected with the upper bearing seat 23 through the first deep groove ball bearing 4, and a hole elastic retainer ring 25 is further arranged between the bottom of the first deep groove ball bearing 4 and the upper bearing seat 23 to ensure smooth rotation of the upper bearing seat 23. An end cover 2 is arranged in the cavity enclosed by the upper cone sleeve 3, the pressing plate 5, the upper bearing seat 23 and the extrusion sleeve 1 to limit the displacement of the upper cone sleeve 3 and the upper bearing seat 23. Under the driving of the driving mechanism, the lower bearing seat 11 drives the rotation of the roller assembly and the upper bearing seat 23, and the roller assembly extrudes the elastic hose 22 while rotating.

[0034] As shown in Figure 1 and Figure 5 , the roller assembly comprises a roller shaft 6, an elastic retainer ring 7 for shaft, a second deep groove ball bearing 8 and a roller 9. The top end of the roller shaft 6 is nested and fixed in the upper bearing seat 23, the bottom end of the roller shaft 6 is connected and fixed with the lower bearing seat 11 through a fastening screw, the roller 9 is nested on the outer periphery of the roller shaft 6, and the elastic retainer ring 7 for shaft and the second deep groove ball bearing 8 are arranged at both ends of the roller 9 connected with the roller shaft 6 to realize the rotation of the roller 9 while rolling and extruding the elastic hose 22.

[0035] As shown in Figure 4 , three groups of roller assemblies are evenly distributed between the lower bearing seat 11 and the upper bearing seat 23 in the circumferential direction, and the circumferential included angle β between adjacent roller assemblies is 120°. As shown in Figure 7 , the extrusion sleeve 1 is provided with a hose extrusion avoiding notch 27 with an equal phase difference of 8° (i.e. equal phase difference) and an arc length of 120° in the circumferential direction of the extrusion sleeve 1, and the avoiding notch 27 is helically distributed on the circumferential direction of the non-opening side of the extrusion sleeve 1 as a whole to ensure that only 120° arc length of each elastic hose 22 is extruded and loosened in the circumferential direction. During each filling, the three groups of roller assemblies evenly distributed (angle difference 120°) on the circumferential outer side of the extrusion sleeve 1 rotate and extrude sixteen elastic hoses 22 arranged in parallel and at equal distances on the extrusion sleeve 1, push the fluid to flow from the liquid inlet on one side of the pump body, flow through the liquid inlet distribution pipe 21, be distributed to the sixteen elastic hoses 22, be collected to the liquid outlet distribution pipe 24, and flow out from the liquid outlet on the other side of the pump body, to realize the fluid conveying process from single pipe to multiple pipes to single pipe, and there is a continuous and uniform time difference, i.e. phase difference, between the extrusion and loosening of each elastic hose 22, to realize the continuous metering and low pulsation conveying of the fluid.

[0036] In the embodiment, when the roller 9 extrudes the elastic hose 22, the outer side of the extrusion sleeve 1 abuts against the elastic hose 22, so that the distance h between the upper layer and the lower layer of the tube wall of the elastic hose 22 is kept as 2x(70%-90%)t, t is the thickness of the tube wall of the elastic hose 22, mm. It is ensured that the wear degree of the inner wall of the elastic hose 22 is low, the amount of particles generated is small, and the fluid filled is not easy to be polluted.

[0037] As shown in Figure 5 The pipeline mechanism further comprises a fourth deep groove ball bearing 18, a lower conical sleeve 19 and a support seat 20. The support seat 20 is rotatably connected with the lower bearing seat 11 through the fourth deep groove ball bearing 18, and the lower conical sleeve 19 is arranged between the support seat 20 and the fourth deep groove ball bearing 18 to realize installation and fixation of the support seat 20. The bottom of the extrusion sleeve 1 is fixedly connected with the support seat 20, and the top of the extrusion sleeve 1 is fixedly connected with the pressing plate 5 to realize stable installation of the pipeline mechanism.

[0038] As shown in Figure 5 and Figure 6 The driving mechanism comprises a speed reducer 15, a driving assembly 16 and an external PLC controller. The driving assembly 16 is installed on the installation table plate 14, and the output end of the driving assembly 16 is connected with the lower bearing seat 11 through the speed reducer 15. The driving assembly 16 and the PLC controller are electrically connected, and the PLC controller controls the operation of the driving assembly 16, for example, controls the driving assembly 16 to start and stop, to reverse, to run at full speed, to adjust the speed, to calibrate the flow and the like, so as to improve the control accuracy of filling.

[0039] In the embodiment, the driving assembly 16 adopts a stepping motor. In other embodiments, the driving assembly 16 can also adopt a servo motor or a motor driving unit. As long as the driving assembly 16 can drive the roller rotating mechanism to rotate stably and realize the roller assembly to extrude the elastic hose 22 stably, it is acceptable.

[0040] Although the utility model discloses as above with preferable embodiment, however, not to define the utility model. Any skilled person in the art, without departing from the spiritual essence and technical scheme of the utility model, can utilize the method and technical content disclosed above to make many possible changes and modifications to the technical scheme of the utility model, or modify as equivalent variation equivalent embodiment. Therefore, any simple modification, equivalent replacement, equivalent variation and modification made to the above embodiment according to the technical essence of the utility model, all still belong to the protection scope of the technical scheme of the utility model.

Claims

1. A low-pulsation, high-capacity external rotary multi-tube parallel peristaltic pump, characterized in that, The system includes a mounting plate (14), on which a pump sleeve, a drive mechanism, a roller rotation mechanism, and a pipeline mechanism are provided. The roller rotation mechanism and the pipeline mechanism are both located inside the pump sleeve. The pipeline mechanism includes a squeezing sleeve (1), an inlet liquid separator (21), an outlet liquid separator (24), and several flexible hoses (22). The inlet liquid separator (21) and the outlet liquid separator (24) are arranged vertically inside the squeezing sleeve (1), and several flexible hoses (22) are arranged vertically parallel and equidistantly on the outside of the squeezing sleeve (1). The two ends of the flexible hoses (22) are respectively Connect the inlet separator (21) and the outlet separator (24); the roller rotation mechanism is located outside the elastic hose (22) and connected to the output end of the drive mechanism; under the drive of the drive mechanism, the roller rotation mechanism rotates and squeezes the vertically distributed elastic hoses (22), driving the fluid to flow in from the inlet of the inlet separator (21) and to the outlet of the outlet separator (24), realizing the fluid transportation process from single pipe → multiple pipes → single pipe, and there is a continuous and uniform time difference, i.e., phase difference, between the squeezing and releasing of each elastic hose (22), realizing continuous low-pulsation fluid transportation.

2. The low-pulsation, high-capacity external rotary multi-tube parallel peristaltic pump according to claim 1, characterized in that, The roller rotation mechanism includes: an end cap (2), an upper tapered sleeve (3), a lower bearing seat (11), a roller assembly, and an upper bearing seat (23); the lower bearing seat (11) is rotatably mounted on the mounting plate (14) via a third deep groove ball bearing (17) and connected to the output end of the drive mechanism; the roller assembly is arranged vertically, with one end of the roller assembly connected to the lower bearing seat (11) and the other end of the roller assembly connected to the upper bearing seat (23); the upper tapered sleeve (3) is nested on the outer side of the top of the extrusion sleeve (1) and is rotatably connected to the upper bearing seat (23) via a first deep groove ball bearing (4); an end cap (2) is provided between the upper tapered sleeve (3), the upper bearing seat (23), and the extrusion sleeve (1) to limit the displacement of the upper tapered sleeve (3) and the upper bearing seat (23); under the drive of the drive mechanism, the lower bearing seat (11) drives the roller assembly and the upper bearing seat (23) to rotate.

3. The low-pulsation, high-capacity external rotary multi-tube parallel peristaltic pump according to claim 2, characterized in that, The roller assembly includes: a roller shaft (6), a shaft elastic retaining ring (7), a second deep groove ball bearing (8), and a roller (9); the two ends of the roller shaft (6) are respectively connected and fixed to the lower bearing seat (11) and the upper bearing seat (23), the roller (9) is nested on the outer circumference of the roller shaft (6), and the two ends of the roller (9) are provided with a shaft elastic retaining ring (7) and a second deep groove ball bearing (8) at the connection between the roller (9) and the roller shaft (6) so as to realize that the roller (9) rotates while rolling the elastic hose (22).

4. The low-pulsation, high-capacity external rotary multi-tube parallel peristaltic pump according to claim 3, characterized in that, Multiple sets of roller assemblies are evenly distributed between the lower bearing seat (11) and the upper bearing seat (23) along the circumferential direction, and the circumferential included angle between adjacent roller assemblies is β; the extrusion sleeve (1) has multiple clearance notches (27) in the circumferential direction, the offset angle difference between adjacent clearance notches (27) is β / (n-1), and the arc length of the clearance notch (27) is β, so that each elastic hose (22) can be rotated, squeezed and released along the arc length β in the circumferential direction; where n is the number of elastic hoses (22) arranged on the outside of the extrusion sleeve (1).

5. The low-pulsation, high-capacity external rotary multi-tube parallel peristaltic pump according to claim 4, characterized in that, When the roller (9) squeezes the elastic hose (22), the outer side of the squeezing sleeve (1) abuts against the elastic hose (22), so that the distance h between the upper and lower layers of the elastic hose (22) wall is kept at 2×(70%~90%)t, where t is the wall thickness of the elastic hose (22) in mm.

6. The low-pulsation, high-capacity external rotary multi-tube parallel peristaltic pump according to claim 3, characterized in that, The pipeline mechanism also includes a fourth deep groove ball bearing (18), a lower tapered sleeve (19), and a support seat (20); the support seat (20) is rotatably connected to the lower bearing seat (11) through the fourth deep groove ball bearing (18), and a lower tapered sleeve (19) is provided between the support seat (20) and the fourth deep groove ball bearing (18) to realize the installation and fixation of the support seat (20); the bottom of the extrusion sleeve (1) is connected and fixed to the support seat (20).

7. The low-pulsation, high-capacity external rotary multi-tube parallel peristaltic pump according to claim 6, characterized in that, The pump sleeve includes a pressure plate (5) and a support plate (10). The support plate (10) is set vertically on the mounting platform (14), and the pressure plate (5) is set horizontally on the top of the support plate (10). The top of the extrusion sleeve (1) is connected and fixed to the pressure plate (5).

8. The low-pulsation, high-capacity external rotary multi-tube parallel peristaltic pump according to any one of claims 1 to 7, characterized in that, Both the inlet liquid separator (21) and the outlet liquid separator (24) are provided with multiple pipe joints (26) in the vertical direction.

9. The low-pulsation, high-capacity external rotary multi-tube parallel peristaltic pump according to any one of claims 1 to 7, characterized in that, The drive mechanism includes a reducer (15), a drive assembly (16), and an external PLC controller; the drive assembly (16) is mounted on a mounting plate (14), and the output end of the drive assembly (16) is connected to the roller rotation mechanism through the reducer (15); the drive assembly (16) and the PLC controller are electrically connected, and the PLC controller controls the operation of the drive assembly (16).

10. The low-pulsation, high-capacity external rotary multi-tube parallel peristaltic pump according to claim 9, characterized in that, The drive component (16) is a stepper motor, a servo motor, or a motor drive unit.

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