A low-pulsation spiral extrusion multi-tube peristaltic pump

Abstract

The present invention discloses a low-pulsation spiral extrusion multi-tube peristaltic pump, wherein a pump sleeve and a driving mechanism are provided on a mounting plate, wherein a spiral tube pressing mechanism and a pipeline mechanism are both located in the pump sleeve; the spiral tube pressing mechanism comprises a spiral eccentric roller assembly and a transmission assembly connected to the driving mechanism, wherein the spiral eccentric roller assembly surrounds the outside of the transmission assembly; the pipeline mechanism comprises an elastic hose and a liquid separation assembly, wherein both ends of the elastic hose are respectively connected to the liquid separation assembly, and a plurality of elastic hoses are evenly distributed along the circumferential direction on the outside of the spiral eccentric roller assembly; the driving mechanism drives the transmission wheel assembly to rotate, thereby driving the spiral eccentric roller assembly to rotate and squeeze the elastic hose, thereby realizing continuous metering and conveying of the fluid. The present invention has the characteristics of one tube inflow, diversion into multiple tubes evenly distributed in a circle with the same phase difference being rotated, squeezed and loosened, and then converging into one tube outflow, thereby effectively reducing the pulsation during fluid transmission, and at the same time solving the problem of fluid contamination in the existing peristaltic pump due to severe wear of the inner wall of the hose and generation of a large number of particles.

Description

Technical Field

[0001] The invention belongs to the technical field of fluid filling pumps, and in particular relates to a low-pulsation spiral extrusion multi-tube peristaltic pump. Background Art

[0002] A peristaltic pump is a liquid delivery device with controllable flow rate. It uses a rotating roller to roll an elastic hose. The fluid in the hose moves as the roller rotates, just like squeezing the hose with two fingers. As the fingers move, the liquid flows.

[0003] Existing peristaltic pumps rely on a roller assembly with a rotating device to rotate and roll the hose to discharge the fluid. For the same hose, the roller squeezes or spins the hose at the same position each time it is filled. The inner wall of the hose at this position will be severely worn, and a large number of particles are easily generated, causing the fluid to be contaminated.

[0004] The existing peristaltic pump controls the rolling extrusion volume of the fluid by the number of turns or angle of the roller assembly. 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 accumulation of turns or angles. In addition, the elastic recovery of the hose at different positions is also different, making it difficult for the traditional peristaltic pump to achieve the expected continuous filling accuracy. Summary of the invention

[0005] The technical problem to be solved by the present invention is to effectively reduce the pulsation of the existing peristaltic pump during fluid transmission, and at the same time solve the problems of severe wear of the inner wall of the hose, easy generation of a large number of particles leading to fluid contamination, and low continuous filling accuracy. The present invention provides a low-pulsation spiral extrusion multi-tube peristaltic pump with a 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] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0007] A low-pulsation spiral extrusion multi-tube peristaltic pump comprises a mounting plate, on which a pump sleeve, a driving mechanism, a spiral tube pressing mechanism and a pipeline mechanism are arranged, and the spiral tube pressing mechanism and the pipeline mechanism are both located in the pump sleeve; the spiral tube pressing mechanism comprises a transmission assembly and a spiral eccentric roller assembly, the spiral eccentric roller assembly is arranged around the outside of the transmission assembly, and the transmission assembly is connected to the output end of the driving mechanism; the pipeline mechanism comprises a liquid separation assembly and a plurality of elastic hoses, the bottom and top of the pump sleeve are both provided with liquid separation assemblies, the two ends of the elastic hose are respectively connected to the corresponding liquid separation assemblies, and the plurality of elastic hoses are uniformly distributed on the outside of the spiral eccentric roller assembly along the circumferential direction; under the drive of the driving mechanism, the transmission wheel assembly rotates, drives the spiral eccentric roller assembly to rotate and squeeze the elastic hoses uniformly distributed in the circumferential direction, drives the fluid to be transported from the liquid inlet of the liquid separation assembly at the bottom of the pump sleeve to the liquid outlet of the liquid separation assembly at the top of the pump sleeve, realizes the fluid transportation process from single tube→multiple tubes→single tube, and there is a continuous and uniform time difference, i.e., phase difference, when each elastic hose is squeezed and released, so as to realize the continuous metering and low-pulsation transportation of the fluid.

[0008] As a further improvement of the present invention, the transmission assembly includes a transmission shaft, an upper bearing seat and a lower bearing seat, the bottom of the lower bearing seat is connected and fixed to the mounting plate, the top of the lower bearing seat is connected and fixed to the bottom of the pump sleeve, the bottom of the transmission shaft passes through the bottom of the pump sleeve, the lower bearing seat and the mounting plate in sequence, and is connected to the output end of the driving mechanism, the top of the transmission shaft is connected to the inner side of the top of the pump sleeve through the upper bearing seat; the spiral eccentric roller assembly is arranged around the outside of the transmission shaft.

[0009] As a further improvement of the present invention, the transmission assembly also includes a first deep groove ball bearing, a bushing and a third deep groove ball bearing; both ends of the lower bearing seat are rotatably connected to the transmission shaft through the first deep groove ball bearing, and a bushing is provided between the two first deep groove ball bearings; a third deep groove ball bearing is provided at the connection between the top of the transmission shaft and the upper bearing seat.

[0010] As a further improvement of the present invention, the transmission assembly further comprises a gasket, which is nested and fixed on the outside of the transmission shaft and located on the top of the spiral eccentric roller assembly to limit the displacement of the spiral eccentric roller assembly.

[0011] As a further improvement of the present invention, the spiral eccentric roller assembly includes an eccentric sleeve, a second deep groove ball bearing and a roller; the eccentric sleeve is nested and fixed on the outside of the transmission shaft along the vertical direction, and multiple rollers are nested in sequence on the outside of the eccentric sleeve along the vertical direction to form a spirally distributed eccentric roller group, and the multiple rollers are evenly distributed in the circumferential direction, and a second deep groove ball bearing is provided between the roller and the eccentric sleeve, and the number of rollers is the same as the number of elastic hoses.

[0012] As a further improvement of the present invention, the spiral eccentric roller assembly further includes a flat key, and two ends of the flat key are respectively embedded in the transmission shaft and the eccentric sleeve to achieve the connection and fixation between the transmission shaft and the eccentric sleeve.

[0013] As a further improvement of the present invention, the liquid separation component includes a lower liquid separation plate and an upper liquid separation plate, and the lower liquid separation plate and the upper liquid separation plate enclose a liquid separation channel. The side of the lower liquid separation plate is provided with an inlet and outlet liquid joint to realize the fluid in and out of the liquid separation channel; the upper liquid separation plate is evenly distributed with a plurality of pipe joints for connecting elastic hoses.

[0014] As a further improvement of the present invention, the driving mechanism includes a driving component and an external PLC controller; the driving component is installed on a mounting plate, and the output end of the driving component is connected to the transmission shaft; the driving component and the PLC controller are electrically connected, and the PLC controller controls the operation of the driving component.

[0015] As a further improvement of the present invention, the driving mechanism further includes a support rod and a coupling; the driving assembly is mounted and fixed on the mounting plate via the support rod, and the output end of the driving assembly is connected to the transmission shaft via the coupling.

[0016] As a further improvement of the present invention, the driving component adopts a stepping motor or a servo motor or a motor driving unit.

[0017] Compared with the prior art, the advantages of the present invention are:

[0018] The low-pulsation spiral extrusion multi-tube peristaltic pump of the present invention is provided with a pump sleeve, a driving mechanism, a spiral tube pressing mechanism and a pipeline mechanism on a mounting plate, and the spiral tube pressing mechanism and the pipeline mechanism are both arranged in the pump sleeve, that is, they constitute the main structure of the peristaltic pump; specifically, the spiral tube pressing mechanism includes a transmission assembly and a spiral eccentric roller assembly connected to the driving mechanism, the spiral eccentric roller assembly is arranged around the outer side of the transmission assembly, and is driven to rotate by the transmission assembly; the pipeline mechanism includes a liquid separation assembly and a plurality of elastic hoses, the two ends of the elastic hoses are respectively connected to the corresponding liquid separation assemblies, and the plurality of elastic hoses are evenly distributed on the outer side of the spiral eccentric roller assembly in the circumferential direction to reduce the overall installation volume of the peristaltic pump; under the drive of the driving mechanism, the transmission wheel assembly rotates, drives the spiral eccentric roller assembly to rotate and squeezes the elastic hoses evenly distributed in the circumferential direction, and drives the fluid from the liquid inlet of the liquid separation assembly at a lower position to the liquid separation assembly at a higher position The assembly outlet is conveyed to realize the fluid conveying process from single tube → multiple tubes → single tube, and there is a continuous and uniform time difference, i.e., phase difference, when each elastic hose is squeezed and released, thus realizing continuous low-pulsation metering and conveying of the fluid; for a single elastic hose, in a single filling process, the spiral eccentric roller squeezes the outer wall of the hose from bottom to top in sequence, thus avoiding the roller squeezing or spinning the hose at the same position every time filling, and the elastic hose can also periodically restore its elasticity, and because the roller synchronously rotates to squeeze the elastic hose, the shearing of the filled liquid molecules and the wear of the hose can be minimized, thus avoiding the risk of fluid contamination due to severe wear of the inner wall of the hose and the generation of a large number of particles, effectively extending the service life of the pump tube, and because the elastic hose is always in a squeezed state during the rotation of the spiral eccentric roller assembly, continuous fluid delivery is ensured, greatly improving the continuous filling accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the main structural principle of a low-pulsation spiral extrusion multi-tube peristaltic pump in a specific embodiment of the present invention.

[0020] Figure 2 It is a schematic diagram of the top structural principle of a low-pulsation spiral extrusion multi-tube peristaltic pump in a specific embodiment of the present invention.

[0021] Figure 3 for Figure 1 Schematic diagram of the cross-sectional structure principle in the AA direction.

[0022] Figure 4 for Figure 1 Schematic diagram of the cross-sectional structure principle along the BB direction.

[0023] Figure 5 for Figure 1 Schematic diagram of the cross-sectional structure principle in the CC direction.

[0024] Figure 6 for Figure 4 Schematic diagram of the cross-sectional structure principle in the DD direction.

[0025] Figure 7 It is a schematic diagram of the three-dimensional isometric structure principle of the low-pulsation spiral extrusion multi-tube peristaltic pump in a specific embodiment of the present invention after the cover plate and the transmission wheel are removed.

[0026] Legend: 1. Support rod; 2. Coupling; 3. Drive shaft; 4. First deep groove ball bearing; 5. Mounting plate; 6. First O-ring; 7. Bushing; 8. Lower separator plate; 91. Liquid inlet connector; 92. Liquid outlet connector; 10. Second O-ring; 11. Upper separator plate; 12. Pipe connector; 13. Elastic hose; 14. Eccentric sleeve; 15. Second deep groove ball bearing; 16. Roller; 17. Upper bearing seat; 18. Pump sleeve; 19. Gasket; 20. First screw; 21. Third deep groove ball bearing; 22. Second screw; 23. Third screw; 24. Lower bearing seat; 25. Drive assembly; 26. Fourth screw; 27. Spring washer; 28. Third O-ring; 29. ​​Flat key. DETAILED DESCRIPTION

[0027] The present invention is further described below in conjunction with the accompanying drawings and specific preferred embodiments, but the protection scope of the present invention is not limited thereby.

[0028] In the description of the present invention, it should be understood that the terms "side", "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0029] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0030] Example

[0031] like Figures 1 to 7As shown, the low-pulsation spiral extrusion multi-tube peristaltic pump of the present invention includes a mounting plate 5, on which a pump sleeve 18, a driving mechanism, a spiral tube pressing mechanism and a pipeline mechanism are provided, and the spiral tube pressing mechanism and the pipeline mechanism are both located in the pump sleeve 18. The spiral tube pressing mechanism includes a transmission assembly and a spiral eccentric roller assembly, and the spiral eccentric roller assembly is arranged around the outside of the transmission assembly, and the transmission assembly is connected to the output end of the driving mechanism. The pipeline mechanism includes a liquid separation assembly and a plurality of elastic hoses 13, and the bottom and top of the pump sleeve 18 are both provided with liquid separation assemblies, and the two ends of the elastic hose 13 are respectively connected to the corresponding liquid separation assemblies, and the plurality of elastic hoses 13 are evenly distributed on the outside of the spiral eccentric roller assembly along the circumferential direction. Driven by the driving mechanism, the transmission wheel assembly rotates, driving the spiral eccentric roller assembly to rotate and squeeze the elastic hose 13 evenly distributed in the circumferential direction, driving the fluid to be transported from the liquid inlet of the liquid separation assembly at the bottom of the pump sleeve 18 to the liquid outlet of the liquid separation assembly at the top of the pump sleeve 18, realizing the fluid transportation process from single tube → multiple tubes → single tube, and each elastic hose 13 is squeezed and released with a continuous and uniform time difference, that is, a phase difference, to achieve continuous metering and low-pulsation transportation of the fluid.

[0032] Furthermore, if Figure 1 , Figure 2 and Figure 7 As shown, the pump sleeve 18 is a hollow cylindrical cavity structure as a whole, and is formed by two semicircular cavities connected by a third screw 23. A spring washer 27 is also provided between the third screw 23 and the pump sleeve 18 to improve the sealing of the connection.

[0033] In this embodiment, the main structure of the peristaltic pump is formed by arranging a pump sleeve 18, a driving mechanism, a spiral tube pressing mechanism and a pipeline mechanism on the mounting plate 5, and the spiral tube pressing mechanism and the pipeline mechanism are both arranged in the pump sleeve 18. Specifically, the spiral tube pressing mechanism includes a transmission assembly connected to the driving mechanism and a spiral eccentric roller assembly, and the spiral eccentric roller assembly is arranged around the outside of the transmission assembly and driven to rotate by the transmission assembly; the pipeline mechanism includes a liquid separation assembly and a plurality of elastic hoses 13, and the two ends of the elastic hose 13 are respectively connected to the corresponding liquid separation assembly, and the plurality of elastic hoses 13 are evenly distributed on the outside of the spiral eccentric roller assembly along the circumferential direction to reduce the overall installation volume of the peristaltic pump. Driven by the driving mechanism, the transmission wheel assembly rotates, driving the spiral eccentric roller assembly to rotate and squeeze the elastic hose 13 evenly distributed in the circumferential direction, driving the fluid to be transported from the liquid inlet of the lower liquid separation assembly to the liquid outlet of the higher liquid separation assembly, realizing the fluid transportation process from single tube → multiple tubes → single tube, and each elastic hose 13 is squeezed and released with a continuous and uniform time difference, that is, a phase difference, to achieve continuous metering and low-pulsation transportation of the fluid. For a single elastic hose 13, during a single canning process, the spiral eccentric roller squeezes the outer wall of the hose from bottom to top in sequence, avoiding the roller squeezing or spinning the hose at the same position every time filling, and the elastic hose 13 can also periodically restore its elasticity. Because the roller rotates synchronously to squeeze the elastic hose 13, the shearing of the filled liquid molecules and the wear of the hose can be reduced to a minimum, avoiding the risk of fluid contamination due to severe wear of the inner wall of the hose and the generation of a large number of particles, effectively extending the service life of the pump tube, and because the spiral eccentric roller assembly rotates, the elastic hose is always in a squeezed state, ensuring continuous fluid delivery and greatly improving the continuous filling accuracy.

[0034] like Figure 1 and Figure 4 As shown, the transmission assembly includes a transmission shaft 3, an upper bearing seat 17 and a lower bearing seat 24. The bottom of the lower bearing seat 24 is connected and fixed to the mounting plate 5, and a first O-ring 6 is provided between the lower bearing seat 24 and the mounting plate 5 for sealing. The top of the lower bearing seat 24 is connected and fixed to the bottom of the pump sleeve 18. The bottom of the transmission shaft 3 passes through the bottom of the pump sleeve 18, the lower bearing seat 24 and the mounting plate 5 in sequence, and is connected to the output end of the driving mechanism. The top of the transmission shaft 3 is connected to the inner side of the top of the pump sleeve 18 through the upper bearing seat 17. The spiral eccentric roller assembly is arranged around the outside of the transmission shaft 3.

[0035] Furthermore, if Figure 6 As shown, the upper bearing seat 17 is fixed to the inner side of the top of the pump sleeve 18 by three first screws 20 to ensure that the transmission shaft 3 is stably installed in the pump sleeve 18.

[0036] like Figure 4As shown, the transmission assembly also includes a first deep groove ball bearing 4, a bushing 7 and a third deep groove ball bearing 21. Both ends of the lower bearing seat 24 are rotatably connected to the transmission shaft 3 through the first deep groove ball bearing 4, and a bushing 7 is provided between the two first deep groove ball bearings 4. A third deep groove ball bearing 21 is provided at the connection between the top of the transmission shaft 3 and the upper bearing seat 17 to ensure smooth rotation of the transmission shaft 3.

[0037] like Figure 4 As shown, the transmission assembly further includes a liner 19, which is nested and fixed on the outside of the transmission shaft 3 and located on the top of the spiral eccentric roller assembly to limit the displacement of the spiral eccentric roller assembly.

[0038] like Figure 1 and Figure 4 As shown, the spiral eccentric roller assembly includes an eccentric sleeve 14, a second deep groove ball bearing 15 and a roller 16. The eccentric sleeve 14 is nested and fixed on the outside of the transmission shaft 3 in the vertical direction, and the twelve rollers 16 are nested on the outside of the eccentric sleeve 14 in sequence in the vertical direction to form an eccentric roller group distributed in a spiral upward, and the twelve rollers 16 are evenly distributed in the circumferential direction, and the circumferential angle between adjacent rollers 16 is 30°. A second deep groove ball bearing 15 is provided between the roller 16 and the eccentric sleeve 14 to enable the roller 16 to squeeze the elastic hose 13 while rotating.

[0039] like Figure 5 As shown, the spiral eccentric roller assembly further includes a flat key 29 , both ends of which are respectively embedded in the transmission shaft 3 and the eccentric sleeve 14 to improve the connection stability between the transmission shaft 3 and the eccentric sleeve 14 .

[0040] like Figure 1 and Figure 4 As shown, the liquid separation component includes a lower liquid separation plate 8 and an upper liquid separation plate 11. The lower liquid separation plate 8 and the upper liquid separation plate 11 enclose a liquid separation channel. The side of the lower liquid separation plate 8 is provided with an inlet and outlet liquid joint to realize the fluid entering and exiting the liquid separation channel; a plurality of pipe joints 12 are evenly distributed on the upper liquid separation plate 11 for connecting an elastic hose 13.

[0041] Furthermore, if Figure 3 As shown, at the bottom of the pump sleeve 18, the lower liquid separation plate 8 is connected and fixed to the lower bearing seat 24 by three first screws 20. Figure 2 As shown, at the top of the pump sleeve 18, the lower liquid separation plate 8 is connected and fixed to the pump sleeve 18 by a plurality of fourth screws 26. Figure 4 As shown, a second O-ring 10 and a third O-ring 28 are respectively provided on both sides of the liquid separation channel enclosed by the lower liquid separation plate 8 and the upper liquid separation plate 11 to ensure the airtightness of the liquid separation channel and avoid fluid leakage.

[0042] During each filling, the spiral eccentric roller assembly rotates to squeeze the twelve elastic hoses 13, pushing the fluid into the liquid inlet at the bottom of the pump body, the liquid inlet joint 91, and flows through the liquid separation channel formed by the lower liquid separation plate 8 and the upper liquid separation plate 11 at the bottom of the pump sleeve 18, and is divided into twelve pipe joints 12, twelve elastic hoses 13, and twelve pipe joints 12, and is gathered in the liquid separation channel formed by the upper liquid separation plate 8 and the upper liquid separation plate 11 at the top of the pump sleeve 18, and flows out from the liquid outlet at the top of the pump body, the liquid outlet joint 92.

[0043] like Figure 1 , Figure 4 and Figure 7 As shown, the driving mechanism includes a driving assembly 25 and an external PLC controller (not shown in the figure). The driving assembly 25 is installed on the mounting plate 5, and the output end of the driving assembly 25 is connected to the transmission shaft 3; the driving assembly 25 is electrically connected to the PLC controller, and the PLC controller controls the operation of the driving assembly 25.

[0044] like Figure 7 As shown, the driving mechanism further includes a support rod 1 and a coupling 2. The driving assembly 25 is mounted and fixed on the mounting plate 5 through a plurality of support rods 1, and the output end of the driving assembly 25 is connected to the transmission shaft 3 through the coupling 2.

[0045] Furthermore, the drive assembly 25 adopts a stepper motor, which has the characteristics of simple installation and precise control. In other embodiments, the drive assembly 25 can also adopt a servo motor or a motor drive unit, as long as it can drive the spiral eccentric roller assembly to rotate smoothly to achieve continuous metering and conveying of materials.

[0046] In this embodiment, the driving assembly 25 drives the coupling 2 and the transmission shaft 3 to rotate, and the transmission shaft 3 drives the spiral eccentric roller assembly to rotate, and the rollers 16 arranged in a spiral (30° uniformly distributed in the circumferential direction, spirally upward) rotate and squeeze the elastic hoses 13 uniformly distributed in the circumferential direction, driving the fluid to be transported from the lower liquid inlet to the higher liquid outlet. Because the twelve eccentric rollers 16 uniformly distributed in the circumferential direction spirally squeeze the twelve elastic hoses 13 uniformly distributed in the circumferential direction, it can ensure that the rollers 16 have the lowest wear on the elastic hoses 13, and can achieve the purpose of high-precision continuous filling.

[0047] Although the present invention is disclosed as above with preferred embodiments, it is not intended to limit the present invention. Any technician familiar with the art can use the above disclosed methods and technical contents to make many possible changes and modifications to the technical solutions of the present invention without departing from the spirit and technical solutions of the present invention, or modify them into equivalent embodiments of equivalent changes. Therefore, any simple modification, equivalent replacement, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solutions of the present invention still fall within the scope of protection of the technical solutions of the present invention.

Claims

1. A low pulsation spiral extrusion multi-tube peristaltic pump, characterized in that: The invention comprises a mounting plate (5), on which a pump sleeve (18), a driving mechanism, a spiral pipe pressing mechanism and a pipeline mechanism are arranged, and the spiral pipe pressing mechanism and the pipeline mechanism are both located in the pump sleeve (18); the spiral pipe pressing mechanism comprises a transmission component and a spiral eccentric roller component, and the spiral eccentric roller component is arranged around the outside of the transmission component, and the transmission component is connected to the output end of the driving mechanism; the pipeline mechanism comprises a liquid separation component and a plurality of elastic hoses (13), and the bottom and top of the pump sleeve (18) are both provided with liquid separation components, and the two ends of the elastic hose (13) are respectively The corresponding liquid separation components are connected, and a plurality of elastic hoses (13) are evenly distributed on the outer side of the spiral eccentric roller component in the circumferential direction; under the drive of the driving mechanism, the transmission wheel component rotates, driving the spiral eccentric roller component to rotate and squeeze the elastic hoses (13) evenly distributed in the circumferential direction, driving the fluid to be transported from the liquid inlet of the liquid separation component at the bottom of the pump sleeve (18) to the liquid outlet of the liquid separation component at the top of the pump sleeve (18), thereby realizing the fluid transportation process from single tube → multiple tubes → single tube, and each elastic hose (13) is squeezed and released with a continuous and uniform time difference, i.e., a phase difference, thereby realizing continuous metering and low-pulsation transportation of the fluid.

2. The low-pulsation spiral extrusion multi-tube peristaltic pump according to claim 1, characterized in that: The transmission assembly comprises a transmission shaft (3), an upper bearing seat (17) and a lower bearing seat (24); the bottom of the lower bearing seat (24) is connected and fixed to the mounting platform (5); the top of the lower bearing seat (24) is connected and fixed to the bottom of the pump sleeve (18); the bottom of the transmission shaft (3) passes through the bottom of the pump sleeve (18), the lower bearing seat (24) and the mounting platform (5) in sequence, and is connected to the output end of the driving mechanism; the top of the transmission shaft (3) is connected to the inner side of the top of the pump sleeve (18) through the upper bearing seat (17); the spiral eccentric roller assembly is arranged around the outer side of the transmission shaft (3).

3. The low-pulsation spiral extrusion multi-tube peristaltic pump according to claim 2, characterized in that: The transmission assembly further comprises a first deep groove ball bearing (4), a bushing (7) and a third deep groove ball bearing (21); both ends of the interior of the lower bearing seat (24) are rotatably connected to the transmission shaft (3) via the first deep groove ball bearing (4), and a bushing (7) is provided between the two first deep groove ball bearings (4); and a third deep groove ball bearing (21) is provided at the connection between the top of the transmission shaft (3) and the upper bearing seat (17).

4. The low-pulsation spiral extrusion multi-tube peristaltic pump according to claim 3, characterized in that: The transmission assembly also includes a liner (19), which is nested and fixed on the outside of the transmission shaft (3) and located on the top of the spiral eccentric roller assembly to limit the displacement of the spiral eccentric roller assembly.

5. The low-pulsation spiral extrusion multi-tube peristaltic pump according to claim 4, characterized in that: The spiral eccentric roller assembly comprises an eccentric sleeve (14), a second deep groove ball bearing (15) and a roller (16); the eccentric sleeve (14) is nested and fixed on the outside of the transmission shaft (3) in the vertical direction, and a plurality of rollers (16) are nested in sequence on the outside of the eccentric sleeve (14) in the vertical direction to form a spirally distributed eccentric roller group, and the plurality of rollers (16) are evenly distributed in the circumferential direction, a second deep groove ball bearing (15) is provided between the roller (16) and the eccentric sleeve (14), and the number of rollers (16) is the same as the number of elastic hoses (13).

6. The low-pulsation spiral extrusion multi-tube peristaltic pump according to claim 5, characterized in that: The spiral eccentric roller assembly also includes a flat key (29), and two ends of the flat key (29) are respectively embedded in the transmission shaft (3) and the eccentric sleeve (14) to achieve the connection and fixation of the transmission shaft (3) and the eccentric sleeve (14).

7. The low-pulsation spiral extrusion multi-tube peristaltic pump according to any one of claims 1 to 5, characterized in that: The liquid separation component comprises a lower liquid separation plate (8) and an upper liquid separation plate (11), wherein the lower liquid separation plate (8) and the upper liquid separation plate (11) enclose a liquid separation channel, and a liquid inlet and outlet joint is provided on the side of the lower liquid separation plate (8) to enable fluid to enter and exit the liquid separation channel; and a plurality of pipe joints (12) are evenly distributed on the upper liquid separation plate (11) to be used for connecting an elastic hose (13).

8. The low-pulsation spiral extrusion multi-tube peristaltic pump according to any one of claims 1 to 5, characterized in that: The driving mechanism comprises a driving component (25) and an external PLC controller; the driving component (25) is mounted on a mounting plate (5), and an output end of the driving component (25) is connected to a transmission shaft (3); the driving component (25) is electrically connected to the PLC controller, and the PLC controller controls the operation of the driving component (25).

9. The low-pulsation spiral extrusion multi-tube peristaltic pump according to claim 8, characterized in that: The driving mechanism further comprises a support rod (1) and a coupling (2); the driving assembly (25) is mounted and fixed on the mounting platform (5) via the support rod (1), and the output end of the driving assembly (25) is connected to the transmission shaft (3) via the coupling (2).

10. The low-pulsation spiral extrusion multi-tube peristaltic pump according to claim 8, characterized in that: The driving component (25) adopts a stepping motor or a servo motor or a motor driving unit.

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