External rotation extrusion type single-tube peristaltic pump

Abstract

The utility model discloses an external rotation extrusion type single-pipe peristaltic pump, which comprises a mounting bedplate, a driving mechanism, a rotary pipe pressing mechanism and a pipeline mechanism are arranged on the mounting bedplate, the pipeline mechanism comprises an extrusion sleeve and an elastic hose, and the elastic hose is arranged on the outer side of the extrusion sleeve along the circumferential direction; the rotary pipe pressing mechanism comprises roller sets 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 multiple roller sets are symmetrically arranged on the side of the rotary seat and located on the outer side of the elastic hose. Under the driving of the driving mechanism, the rotating seat rotates to drive the roller group to rotate and extrude the elastic hose, so that fluid is driven to flow in from the inlet of the elastic hose and is conveyed to the outlet of the elastic hose, and continuous conveying of the fluid is realized. 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, 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] This utility model belongs to the field of fluid filling pump technology, specifically relating to an external rotary extrusion type 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 problems of fluid contamination caused by severe wear of the inner wall of the hose and the generation of a large number of particles during fluid transmission in existing peristaltic pumps, as well as low continuous filling accuracy. The present invention provides an external rotary extrusion 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] An external rotary extrusion type single-tube peristaltic pump includes a mounting platform. The mounting platform is equipped with a drive mechanism, a rotary extrusion mechanism, and a pipeline mechanism. The pipeline mechanism includes an extrusion sleeve and an elastic hose. The elastic hose is arranged circumferentially on the outer side of the extrusion sleeve. The rotary extrusion 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 extrusion sleeve. Multiple sets of roller assemblies are symmetrically arranged on the side of the rotating seat, and the roller assemblies are located outside the elastic hose. Driven by the drive mechanism, the rotating seat rotates, driving the roller assemblies to rotate and extrude the elastic hose, so as to drive fluid to flow in from the inlet of the elastic hose and deliver it to the outlet of the elastic hose, thereby realizing continuous fluid delivery.

[0008] As a further improvement of this utility model, the two sets of rollers are symmetrically arranged on both sides of the rotating seat at a 180° angle.

[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 arranged on the outside of the extrusion sleeve in a circumferential direction.

[0012] As a further improvement of this utility model, the outer side of the extrusion sleeve is provided with an avoidance notch along the circumferential direction; the avoidance notch cooperates with the roller assembly to ensure that the arc length 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 utility model relates to an external rotary extrusion type single-tube peristaltic pump. An elastic hose is wound circumferentially around the outside of an extrusion 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 extrusion sleeve. Multiple sets of rollers are symmetrically arranged on the side of the rotating seat, located outside the elastic hose. The drive mechanism drives the rotating seat to rotate, which in turn drives the roller sets to rotate. The roller sets cooperate with the extrusion sleeve, thus achieving circumferential extrusion of the elastic hose. This causes fluid to flow in from the inlet of the elastic hose and be transported to the outlet, achieving continuous fluid delivery. This ensures minimal wear on the elastic hose from the extrusion mechanism, avoids the risk of fluid contamination due to severe wear of the hose's inner wall and the generation of a large number of particles, and effectively extends the service life of the elastic hose. Because the elastic hose is always under extrusion during the rotation of the extrusion 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 the external rotary extrusion 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 the external rotary extrusion type 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 the external rotary extrusion type single-tube peristaltic pump in a specific embodiment of this utility model.

[0022] Figure 4 This is a top view schematic diagram of the external rotary extrusion type 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 external rotary extrusion 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 6 As shown, this utility model's external rotary extrusion type single-tube peristaltic pump includes a mounting plate 12, on which a drive mechanism, a rotary extrusion mechanism, and a pipeline mechanism are provided. The pipeline mechanism includes an extrusion sleeve 6 and an elastic hose 5, with the elastic hose 5 arranged circumferentially on the outer side of the extrusion sleeve 6. The rotary extrusion mechanism includes a roller assembly and a rotating seat 8. One end of the rotating seat 8 passes through the mounting plate 12 and connects to the output end of the drive mechanism, while the other end of the rotating seat 8 connects to the bottom of the extrusion sleeve 6. A second deep groove ball bearing 7 is provided at the connection between the rotating seat 8 and the extrusion sleeve 6, and a third deep groove ball bearing 11 is provided at the connection between the rotating seat 8 and the mounting plate 12 to ensure smooth rotation of the rotating seat 8. Multiple sets of roller assemblies are symmetrically arranged on the side of the rotating seat 8, located outside the elastic hose 5. Driven by the drive mechanism, the rotating seat 8 rotates, causing the roller assemblies to rotate and extrude the elastic hose 5, thereby driving fluid to flow in from the inlet of the elastic hose 5 and deliver it to the outlet of the elastic hose 5, achieving continuous fluid delivery.

[0031] 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. Multiple sets of rollers are symmetrically arranged 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 sets to rotate. The roller sets cooperate with the compression sleeve 6 to achieve circumferential compression of the flexible hose 5, which drives the fluid to flow in from the inlet of the flexible hose 5 and to the outlet of the flexible hose 5, thus achieving the purpose of continuous fluid delivery. This ensures that the wear of the hose compression mechanism on the flexible hose is minimized, avoids the risk of fluid contamination caused by severe wear of the inner wall of the hose and the generation of a large number of particles, and effectively extends the service life of the flexible hose 5. Since there is always a part of the flexible hose 5 in a compression state during the rotation of the hose compression mechanism, the purpose of high-precision and large-capacity continuous filling is achieved.

[0032] 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. The bottom of the roller shaft 1 is connected and fixed to the rotating seat 8 by fastening screws. The roller 4 is nested on the outer periphery of the upper part of the roller shaft 1. The first deep groove ball bearing 3 is provided at both ends of the roller 4 and the connection point of the roller shaft 1, so as to realize that the roller 4 rotates while rolling the elastic hose 5.

[0033] like Figure 5 As shown, 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.

[0034] like Figure 6 As shown, the two sets of rollers are symmetrically arranged at a 180° angle on both sides of the rotating seat 8, so that during the rotation of the rotating seat 8, a part of the elastic hose 5 is always squeezed by the rollers, thereby achieving the purpose of continuous fluid delivery.

[0035] like Figure 1 and Figure 6 As shown, a waterproof retaining ring 9 is provided between the rotating seat 8 and the mounting plate 12. The waterproof retaining ring 9 is connected to the mounting plate 12 by fastening screws, and an O-ring seal 10 is provided between the waterproof retaining ring 9 and the mounting plate 12 to prevent the inner side of the rotating seat 8 from being contaminated.

[0036] like Figure 6As 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 arranged circumferentially 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.

[0037] like Figure 4 As shown, the outer side of the extrusion sleeve 6 is provided with a clearance notch 21 along the circumferential direction; the clearance notch 21 cooperates with the roller assembly to ensure that the arc length of the elastic hose 5 being rotated and squeezed in the circumferential direction is not less than 180°. During each filling, the two sets of evenly distributed roller assemblies on the outer side of the extrusion sleeve 6 rotate and squeeze the elastic hose 5 arranged on the extrusion sleeve 6, pushing the fluid to flow in from the inlet of the elastic hose 5, flow through the entire elastic hose 5, and then flow out from the outlet of the elastic hose 5, realizing continuous fluid delivery.

[0038] 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.

[0039] 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.

[0040] 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.

[0041] 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. An external rotary extrusion type 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 arranged circumferentially on the outside of the compression sleeve (6). 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). Multiple sets of roller assemblies are symmetrically arranged on the side of the rotating seat (8), and the roller assemblies are located outside 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 elastic hose (5), so as to drive the fluid to flow in from the inlet of the elastic hose (5) and to be transported to the outlet of the elastic hose (5), thereby realizing continuous fluid transport.

2. The external rotary extrusion type single-tube peristaltic pump according to claim 1, characterized in that, Two sets of rollers are symmetrically arranged at a 180° angle on both sides of the rotating seat (8).

3. The external rotary extrusion type 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 external rotary extrusion type 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 external rotary extrusion type single-tube peristaltic pump according to claim 4, characterized in that, The end of the extrusion 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 extrusion sleeve (6) through the first positioning notch (18). After passing through the installation notch (19), the elastic hose (5) is arranged on the outside of the extrusion sleeve (6) in a circumferential direction.

6. The external rotary extrusion type single-tube peristaltic pump according to claim 5, characterized in that, The extrusion sleeve (6) has a clearance notch (21) on the outer side along the circumferential direction; the clearance notch (21) cooperates with the roller assembly to ensure that the arc length of the elastic hose (5) being rotated and extruded in the circumferential direction is not less than 180°.

7. The external rotary extrusion type 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 external rotary extrusion type 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 external rotary extrusion type 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 external rotary extrusion type 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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