Low-pulsation external rotation single-tube peristaltic pump

Abstract

The utility model discloses a low-pulsation external rotation single-pipe peristaltic pump, a driving mechanism, a rotary pipe pressing mechanism and a pipeline mechanism are arranged on a mounting bedplate, the pipeline mechanism comprises an extrusion sleeve and an elastic hose, and the elastic hose is spirally distributed on the outer side of the extrusion sleeve along the vertical direction; the rotary pipe pressing mechanism comprises a roller assembly and a rotary seat, one end of the rotary seat is connected with the output end of the driving mechanism, the other end of the rotary seat is connected with the extrusion sleeve, and the roller assembly is arranged on the side of the rotary seat and located outside the elastic hose. The driving mechanism drives the rotating seat to rotate, the roller assembly is driven to rotate and extrude the elastic hose, continuous and uniform time difference exists when each circle of elastic hose is extruded or loosened, and continuous low-pulse conveying of fluid 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, effectively reduces pulsation during fluid transmission, and solves 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, the fluid is polluted, and the continuous filling precision is low.

Description

Technical Field

[0001] This utility model belongs to the field of fluid filling pump technology, specifically relating to a low-pulsation external rotating single-tube peristaltic pump. Background Technology

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

[0003] Existing peristaltic pumps rely on roller assemblies with rotating devices to rotate and roll the hose to discharge fluid. For the same hose, the rollers squeeze or roll the hose in the same position every time it is filled. The inner wall of the hose will be severely worn at this position, and a large number of particles will be generated, which will lead to fluid contamination.

[0004] Existing peristaltic pumps control the fluid extrusion rate by the number of rotations or the angle of the roller assembly. For each filling cycle, the initial and final positions of the roller assembly rolling the hose will not be the same due to the cumulative number of rotations or angles. In addition, the elastic recovery of the hose varies at different positions, making it difficult for traditional peristaltic pumps to achieve the expected continuous filling accuracy. Utility Model Content

[0005] The technical problem to be solved by this utility model is to effectively reduce the pulsation during fluid transmission in existing peristaltic pumps, and at the same time solve the problems of fluid contamination caused by severe wear of the inner wall of the hose, easy generation of a large number of particles, and low continuous filling accuracy. The present invention provides a low-pulsation external rotating single-tube 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-mentioned technical problems, the present invention adopts the following technical solution:

[0007] A low-pulsation external rotary single-tube peristaltic pump includes a mounting platform. The mounting platform is equipped with a drive mechanism, a rotary tube pressing mechanism, and a pipeline mechanism. The pipeline mechanism includes a compression sleeve and an elastic hose. The elastic hose is spirally arranged on the outer side of the compression sleeve in a vertical direction. The rotary tube pressing mechanism includes a roller assembly and a rotating seat. One end of the rotating seat is connected to the output end of the drive mechanism, and the other end of the rotating seat is connected to the compression sleeve. The roller assembly is located on the side of the rotating seat and outside the elastic hose. Driven by the drive mechanism, the rotating seat rotates, causing the roller assembly to rotate and compress the vertically arranged spiral elastic hose. There is a continuous and uniform time difference, i.e., a phase difference, between each turn of the elastic hose being compressed or released, thus achieving continuous low-pulsation fluid delivery.

[0008] As a further improvement of this utility model, a single set of rollers is provided on the side of the rotating seat, and the height of the rollers is matched with the height of the spiral elastic hose.

[0009] As a further improvement of this utility model, the roller assembly includes: a roller shaft, a first deep groove ball bearing, and a roller; one end of the roller shaft is connected and fixed to a rotating seat, and the roller is nested on the outer periphery of the other end of the roller shaft. The connection points between both ends of the roller and the roller shaft are provided with first deep groove ball bearings, so as to realize that the roller rotates while rolling the elastic hose.

[0010] As a further improvement of this utility model, the end of the roller shaft is provided with a shaft elastic retaining ring, which is located outside the first deep groove ball bearing to limit the displacement of the first deep groove ball bearing.

[0011] As a further improvement of this utility model, the end of the extrusion sleeve is provided with a first positioning notch and an installation notch. The first positioning notch and the installation notch are arranged opposite to each other. The elastic hose enters and exits the extrusion sleeve through the first positioning notch. After passing through the installation notch, the elastic hose is spirally arranged on the outside of the extrusion sleeve.

[0012] As a further improvement of this utility model, the outer side of the extrusion sleeve is provided with multiple spiral clearance notches along the vertical direction; the clearance notches cooperate with the rollers to ensure that the arc length of a single turn of the elastic hose being rotated and extruded in the circumferential direction is not less than 180°.

[0013] As a further improvement of this utility model, the pipeline mechanism also includes a traction rod located outside the roller assembly. The traction rod has an L-shaped structure, with one end connected to the mounting plate and the other end connected to the compression sleeve. The traction rod is provided with a second positioning notch corresponding to the first positioning notch, for assisting in the positioning and installation of the elastic hose.

[0014] As a further improvement of this utility model, a waterproof retaining ring is provided between the rotating seat and the mounting plate, and an O-ring is provided between the waterproof retaining ring and the mounting plate.

[0015] As a further improvement of this utility model, the drive mechanism includes a reducer, a drive assembly, and an external PLC controller; the drive assembly is mounted on a mounting plate, and the output end of the drive assembly is connected to the roller rotation mechanism through the reducer; the drive assembly and the PLC controller are electrically connected, and the PLC controller controls the operation of the drive assembly.

[0016] As a further improvement of this utility model, the driving component adopts a stepper motor, a servo motor, or a motor drive unit.

[0017] Compared with the prior art, the advantages of this utility model are:

[0018] This invention relates to a low-pulsation external rotating single-tube peristaltic pump. An elastic hose is wound circumferentially around the outside of a compression sleeve. One end of the rotating seat is connected to the output end of the drive mechanism, and the other end is connected to the compression sleeve. A roller assembly is positioned on the side of the rotating seat, outside the elastic hose. The drive mechanism drives the rotating seat to rotate, which in turn drives the roller assembly. The roller assembly cooperates with the compression sleeve, thus compressing the spirally arranged elastic hose vertically. This allows fluid to flow from the inlet to the outlet of the elastic hose, achieving continuous fluid delivery. Because a single roller assembly rotates and rolls the spirally arranged elastic hose, there is a continuous and uniform time difference (phase difference) between each rotation and release of the elastic hose, achieving continuous low-pulsation fluid delivery. This ensures minimal wear on the elastic hose by the compression mechanism, avoids the risk of fluid contamination due to severe wear of the hose's inner wall and the generation of numerous particles, and effectively extends the service life of the elastic hose. Since a portion of the elastic hose is always under compression during the rotation of the compression mechanism, high-precision, large-capacity continuous filling is achieved. Attached Figure Description

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

[0020] Figure 2 This is a schematic diagram of the right-side structure of a low-pulsation external rotating single-tube 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 external rotating single-tube peristaltic pump in a specific embodiment of this utility model.

[0022] Figure 4 This is a top view schematic diagram of the low-pulsation external rotating single-tube peristaltic pump in a specific embodiment of this utility model.

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

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

[0025] Legend: 1. Roller shaft; 2. Shaft retaining ring; 3. First deep groove ball bearing; 4. Roller; 5. Flexible hose; 6. Extrusion sleeve; 7. Second deep groove ball bearing; 8. Rotary seat; 9. Waterproof retaining ring; 10. O-ring seal; 11. Third deep groove ball bearing; 12. Mounting platform; 13. Reducer; 14. Drive assembly; 15. Traction rod; 16. Spring washer; 17. Bolt; 18. First positioning notch; 19. Mounting notch; 20. Second positioning notch; 21. Clearance notch. Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings and specific preferred embodiments, but this does not limit the scope of protection of the present invention.

[0027] In the description of this utility model, it should be understood that 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", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0028] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "multiple" means two or more, unless otherwise explicitly specified.

[0029] Example

[0030] like Figure 1 , Figure 2 , Figure 3 and Figure 6As shown, the low-pulsation external rotary single-tube peristaltic pump of this utility model includes a mounting platform 12, on which a drive mechanism, a rotary pressing mechanism, and a pipeline mechanism are provided. The pipeline mechanism includes a compression sleeve 6 and a single elastic hose 5, with the elastic hose 5 spirally arranged on the outer side of the compression sleeve 6 in a vertical direction. The rotary pressing mechanism includes a roller assembly and a rotating seat 8. The bottom of the rotating seat 8 is connected to the output end of the drive mechanism, and the top of the rotating seat 8 is connected to the bottom of the compression sleeve 6. The roller assembly is located on the side of the rotating seat 8 and is positioned outside the elastic hose 5. Driven by the drive mechanism, the rotating seat 8 rotates, causing the roller assembly to rotate and compress the vertically arranged spiral elastic hose 5. Each turn of the elastic hose 5 is compressed or released with a continuous and uniform time difference, i.e., a phase difference, achieving continuous low-pulsation fluid delivery.

[0031] like Figure 4 and Figure 6 As shown, a single set of rollers is provided on the side of the rotating seat 8. The height of the roller assembly matches the height of the spiral elastic hose 5 to ensure that there is always a part of the elastic hose 5 under compression during the rotation of the roller assembly.

[0032] In this embodiment, the flexible hose 5 is wound around the outside of the compression sleeve 6 in a circumferential direction. One end of the rotating seat 8 is connected to the output end of the drive mechanism, and the other end of the rotating seat 8 is connected to the compression sleeve 6. The roller assembly is set on the side of the rotating seat 8 and located outside the flexible hose 5. The rotating seat 8 is driven to rotate by the drive mechanism, which in turn drives the roller assembly to rotate. The roller assembly cooperates with the compression sleeve 6, thereby realizing the compression of the spirally arranged flexible hose 5 in a vertical direction. This drives the fluid to flow in from the inlet of the flexible hose 5 and to be transported to the outlet of the flexible hose 5, achieving the purpose of continuous fluid transport. Because a single set of roller assemblies rotates and rolls the spirally arranged flexible hose 5, there is a continuous and uniform time difference, i.e., a phase difference, between each turn of the flexible hose 5 being compressed or released. This achieves continuous low-pulsation fluid transport, ensuring that the wear of the compression mechanism on the flexible hose 5 is minimized and 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. This effectively extends the service life of the flexible hose. Since there is always a part of the flexible hose in a compressed state during the rotation of the compression mechanism, the purpose of high-precision and large-capacity continuous filling is achieved.

[0033] like Figure 4 and Figure 5 As shown, the roller assembly includes: a roller shaft 1, a first deep groove ball bearing 3, and a roller 4. One end of the roller shaft 1 is connected and fixed to the rotating seat 8, and the roller 4 is nested on the outer circumference of the other end of the roller shaft 1. The first deep groove ball bearing 3 is provided at both ends of the roller 4 where it is connected to the roller shaft 1, so as to realize that the roller 4 rotates while rolling the elastic hose 5.

[0034] Furthermore, the roller shaft 1 is provided with a shaft elastic retaining ring 2 at its end. The shaft elastic retaining ring 2 is located outside the first deep groove ball bearing 3 to limit the displacement of the first deep groove ball bearing 3.

[0035] like Figure 6 As shown, the extrusion sleeve 6 has a first positioning notch 18 and an installation notch 19 at its end. The first positioning notch 18 and the installation notch 19 are positioned opposite each other, with the first positioning notch 18 being higher than the installation notch 19. The elastic hose 5 enters and exits the extrusion sleeve 6 through the first positioning notch 18, and after passing through the installation notch 19, the elastic hose 5 is spirally arranged on the outside of the extrusion sleeve 6. The elastic hose 5 is arranged at an angle between the first positioning notch 18 and the installation notch 19 to improve the reliability of the installation of the elastic hose 5 and prevent the elastic hose 5 from shifting during the extrusion process.

[0036] like Figure 5 As shown, the outer side of the extrusion sleeve 6 has multiple spiral clearance notches 21 along the vertical direction. The clearance notches 21 cooperate with the rollers 4 to ensure that the arc length of a single turn of the elastic hose 5 is not less than 180° when it is rotated and squeezed in the circumferential direction. During each filling, the roller assembly on the outer circumference of the extrusion sleeve 6 rotates and squeezes the elastic hose 5 arranged on the extrusion sleeve 6, pushing the fluid to spirally descend from the inlet of the elastic hose 5 and flow into it. After flowing through the entire elastic hose 5, it spirally rises from the outlet of the elastic hose 5 and flows out, realizing continuous fluid delivery.

[0037] like Figure 1 and Figure 6 As shown, the pipeline mechanism also includes a traction rod 15 located outside the roller assembly. The traction rod 15 has an L-shaped structure. The bottom of the traction rod 15 is connected to the mounting plate 12 by fastening screws. The top of the traction rod 15 is connected to the top of the compression sleeve 6 by spring washers 16 and bolts 17. The traction rod 15 is provided with a second positioning notch 20 corresponding to the first positioning notch 18, which is used to assist in the positioning and installation of the elastic hose 5 and improve the stability of the installation of the elastic hose 5.

[0038] like Figure 5 and Figure 6 As shown, the drive mechanism includes a reducer 13, a drive assembly 14, and an external PLC controller. The drive assembly 14 is mounted on the mounting plate 12, and its output is connected to the rotary base 8 via the reducer 13. The drive assembly 14 and the PLC controller are electrically connected, and the PLC controller controls the operation of the drive assembly 14, such as controlling its start / stop, forward / reverse rotation, full speed, speed adjustment, and flow calibration, to improve the control accuracy of filling.

[0039] In this embodiment, the drive assembly 14 is a stepper motor. In other embodiments, the drive assembly 14 may also be a servo motor or a motor drive unit. The key is to ensure that the rotating base 8 rotates smoothly, thereby achieving smooth compression of the elastic hose 5 by the roller assembly.

[0040] While the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make many possible variations and modifications to the technical solutions of the present invention, or modify them into equivalent embodiments, without departing from the spirit and technical essence of the present invention. Therefore, any simple modifications, equivalent substitutions, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention, without departing from the content of the technical solutions of the present invention, shall still fall within the protection scope of the present invention.

Claims

1. A low-pulsation external rotary single-tube peristaltic pump, characterized in that, The system includes a mounting platform (12), which is equipped with a drive mechanism, a rotary pressing mechanism, and a pipe mechanism. The pipe mechanism includes a compression sleeve (6) and an elastic hose (5). The elastic hose (5) is spirally arranged on the outside of the compression sleeve (6) in the vertical direction. The rotary pressing mechanism includes a roller assembly and a rotating seat (8). One end of the rotating seat (8) is connected to the output end of the drive mechanism, and the other end of the rotating seat (8) is connected to the compression sleeve (6). The roller assembly is located on the side of the rotating seat (8) and is located on the outside of the elastic hose (5). Under the drive of the drive mechanism, the rotating seat (8) rotates, which drives the roller assembly to rotate and compress the vertically arranged spiral elastic hose (5). There is a continuous and uniform time difference, i.e., a phase difference, between each turn of the elastic hose (5) being compressed or released, so as to realize continuous low-pulsation fluid delivery.

2. The low-pulsation external rotary single-tube peristaltic pump according to claim 1, characterized in that, The rotating seat (8) is provided with a single set of rollers on its side, and the height of the rollers is matched with the height of the spiral elastic hose (5).

3. The low-pulsation external rotary single-tube peristaltic pump according to claim 2, characterized in that, The roller assembly includes: a roller shaft (1), a first deep groove ball bearing (3), and a roller (4); one end of the roller shaft (1) is connected and fixed to the rotating seat (8), and the roller (4) is nested on the outer periphery of the other end of the roller shaft (1). The first deep groove ball bearing (3) is provided at the connection between both ends of the roller (4) and the roller shaft (1) so as to realize that the roller (4) rotates while rolling the elastic hose (5).

4. The low-pulsation external rotary single-tube peristaltic pump according to claim 3, characterized in that, The roller shaft (1) is provided with a shaft elastic retaining ring (2) at its end. The shaft elastic retaining ring (2) is located outside the first deep groove ball bearing (3) to limit the displacement of the first deep groove ball bearing (3).

5. The low-pulsation external rotary single-tube peristaltic pump according to claim 4, characterized in that, The end of the compression sleeve (6) is provided with a first positioning notch (18) and an installation notch (19). The first positioning notch (18) and the installation notch (19) are arranged opposite to each other. The elastic hose (5) enters and exits the compression sleeve (6) through the first positioning notch (18). After passing through the installation notch (19), the elastic hose (5) is spirally arranged on the outside of the compression sleeve (6).

6. The low-pulsation external rotary single-tube peristaltic pump according to claim 5, characterized in that, The outer side of the compression sleeve (6) is provided with multiple spiral clearance notches (21) in the vertical direction; the clearance notches (21) cooperate with the roller (4) to realize that the arc length of the single-turn elastic hose (5) being rotated and squeezed in the circumferential direction is not less than 180°.

7. The low-pulsation external rotary single-tube peristaltic pump according to claim 6, characterized in that, The pipeline mechanism also includes a traction rod (15) located outside the roller assembly. The traction rod (15) has an L-shaped structure. One end of the traction rod (15) is connected to the mounting plate (12), and the other end of the traction rod (15) is connected to the compression sleeve (6). The traction rod (15) is provided with a second positioning notch (20) corresponding to the first positioning notch (18) to assist in the positioning and installation of the elastic hose (5).

8. The low-pulsation external rotary single-tube peristaltic pump according to any one of claims 1 to 7, characterized in that, A waterproof retaining ring (9) is provided between the rotating seat (8) and the mounting plate (12), and an O-ring (10) is provided between the waterproof retaining ring (9) and the mounting plate (12).

9. The low-pulsation external rotary single-tube peristaltic pump according to any one of claims 1 to 7, characterized in that, The drive mechanism includes a reducer (13), a drive assembly (14), and an external PLC controller; the drive assembly (14) is mounted on the mounting plate (12), and the output end of the drive assembly (14) is connected to the roller rotation mechanism through the reducer (13); the drive assembly (14) and the PLC controller are electrically connected, and the PLC controller controls the operation of the drive assembly (14).

10. The low-pulsation external rotary single-tube peristaltic pump according to claim 9, characterized in that, The drive component (14) is a stepper motor, a servo motor, or a motor drive unit.

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