Single-tube spiral peristaltic pump

Abstract

The utility model discloses a single-tube spiral peristaltic pump. A driving mechanism, a rotating mechanism, a hose fixing mechanism, a roller tube pressing mechanism and an elastic hose are arranged on a mounting bedplate; the elastic hose and the roller pipe pressing mechanism are arranged in the hose fixing mechanism; the rotating mechanism comprises an eccentric shaft, one end of the eccentric shaft is connected with the driving mechanism, and the other end of the eccentric shaft extends into the hose fixing mechanism and is connected with the roller pipe pressing mechanism; under the driving of the driving mechanism, the eccentric shaft drives the roller pipe pressing mechanism to rotate and swing in the circumferential direction and is matched with the hose fixing mechanism to extrude or loosen the elastic hose wound into a spiral shape, so that continuous conveying of fluid is achieved. The peristaltic pump has the advantages of being convenient to disassemble and assemble, high in reliability, low in abrasion loss of the inner wall of the hose, high in repeated filling precision, low in cost and the like, and solves the problems that in an existing peristaltic pump, the inner wall of the hose is abraded seriously, fluid is polluted due to the fact that a large number of particles are generated, the repeated filling precision is low, and the filling measuring range is narrow.

Description

Technical Field

[0001] This utility model relates to the field of fluid filling pump technology, specifically to a single-tube spiral 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 have a flexible rolling roller on one side of the working hose and a relatively fixed arc-shaped back plate on the other side. The flexible rolling roller presses the hose against the back plate to achieve the purpose of peristaltic fluid delivery. However, this method is prone to wear on the inner wall of the hose.

[0004] Furthermore, existing peristaltic pumps have a limited range of filling volumes per single pass. Currently, the market offers peristaltic pumps with varying flow rates, ranging from micro to large. However, a high-precision continuous-filling peristaltic pump that is not limited by flow rate range is lacking. Utility Model Content

[0005] The technical problem to be solved by this utility model is to address the issues of severe wear on the inner wall of the hose in existing peristaltic pumps, resulting in the generation of a large number of particles that cause fluid contamination, as well as low refill accuracy and narrow filling range. The present invention provides a single-tube spiral peristaltic pump that is compact in structure, easy to assemble and disassemble, highly reliable, has low wear on the inner wall of the hose, high refill accuracy, and low cost.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0007] A single-tube spiral peristaltic pump includes a mounting platform. The mounting platform is equipped with a drive mechanism, a rotation mechanism, a hose fixing mechanism, a roller pressing mechanism, and an elastic hose. The elastic hose and the roller pressing mechanism are both housed within the hose fixing mechanism, and the elastic hose is spirally wound. The rotation mechanism includes an eccentric shaft, one end of which is connected to the drive mechanism, and the other end extends into the hose fixing mechanism and connects to the roller pressing mechanism. Driven by the drive mechanism, the eccentric shaft drives the roller pressing mechanism to rotate and oscillate in a circumferential direction, cooperating with the hose fixing mechanism to compress or loosen the spirally wound elastic hose, thereby achieving continuous fluid delivery.

[0008] As a further improvement of this utility model, the rotating mechanism further includes a mounting block, a coupling, and a bearing housing. One end of the bearing housing is fixedly connected to the mounting plate, and the other end of the bearing housing is fixedly connected to the hose fixing mechanism. One end of the mounting block is fixedly connected to the mounting plate, and the other end of the mounting block is fixedly connected to the drive mechanism. The coupling is installed inside the mounting block. One end of the eccentric shaft is connected to the output end of the drive mechanism through the coupling. The other end of the eccentric shaft passes through the mounting block, the mounting plate, and the bearing housing in sequence, and then extends into the hose fixing mechanism to connect with the roller pressing mechanism.

[0009] As a further improvement of this utility model, the bearing housing includes a bearing housing, a shaft elastic retaining ring, a first deep groove ball bearing, and a second deep groove ball bearing; the bottom of the bearing housing passes through the mounting plate and is connected to the mounting block; the top of the bearing housing is connected to the hose fixing mechanism; the bottom of the bearing housing is provided with a shaft elastic retaining ring and a first deep groove ball bearing at the connection between it and the eccentric shaft; and the top of the bearing housing is provided with a second deep groove ball bearing at the connection between it and the eccentric shaft.

[0010] As a further improvement of this utility model, the hose fixing mechanism includes a right pump body and a left pump body. The left pump body is connected and fixed to the top of the bearing seat by a second bolt. The right pump body and the left pump body are connected and fixed by knurled screws. The inner wall surfaces of the right pump body and the left pump body are provided with spiral grooves for installing elastic hoses. The roller pressing mechanism is located in the cavity formed by the right pump body and the left pump body.

[0011] As a further improvement of this utility model, the roller pressing mechanism includes a roller, which is nested on an eccentric shaft. Both ends of the roller are provided with a third deep groove ball bearing at the connection between the roller and the eccentric shaft. Under the drive of the driving mechanism, the eccentric shaft drives the roller to rotate and swing at the same time, so as to squeeze or release the elastic hose in the circumferential direction.

[0012] As a further improvement of this utility model, the roller pressing mechanism also includes a bearing end cover, which is located at the end of the eccentric shaft and the roller, and is connected and fixed to the end of the eccentric shaft by a first bolt.

[0013] As a further improvement of this utility model, the drive mechanism includes a reducer and a drive assembly. The output end of the drive assembly is connected to the reducer, the reducer is connected to the mounting block, and the output end of the drive assembly is connected to the coupling through the reducer.

[0014] As a further improvement of this utility model, the drive mechanism also includes an external PLC controller, the drive component is electrically connected to the PLC controller, and the PLC controller controls the drive component to run automatically.

[0015] As a further improvement of this utility model, the driving component adopts a stepper motor, a servo motor, or a motor drive unit.

[0016] Compared with the prior art, the advantages of this utility model are:

[0017] This invention relates to a single-tube spiral peristaltic pump. Both the elastic hose and the roller pressing mechanism are housed within a hose fixing mechanism, with the elastic hose arranged spirally within the fixing mechanism. One end of an eccentric shaft is connected to a drive mechanism, and the other end to the roller pressing mechanism. The drive mechanism rotates the eccentric shaft, which in turn drives the roller pressing mechanism to rotate and oscillate circumferentially. The roller pressing mechanism, in conjunction with the hose fixing mechanism, compresses or releases the spirally wound elastic hose in a circumferential direction, allowing fluid to flow in from the inlet at the lower end of the elastic hose, spiral upwards along the hose, and out from the outlet at the upper end, thus achieving continuous fluid filling. Furthermore, the elastic hose is only subjected to the oscillating rotation and pressure of the roller pressing mechanism in the circumferential direction, resulting in minimal compression wear and very low wear on the inner wall of the elastic hose. This reduces the amount of particulate matter generated, making the filled fluid less susceptible to contamination. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the main structural principle of the single-tube spiral peristaltic pump in a specific embodiment of this utility model;

[0019] Figure 2 This is a schematic diagram of the right-side structure of the single-tube spiral peristaltic pump in a specific embodiment of the present invention;

[0020] Figure 3 This is a top view schematic diagram of the single-tube spiral peristaltic pump in a specific embodiment of the present invention;

[0021] Figure 4 for Figure 1 Sectional view along the middle AA direction;

[0022] Figure 5 for Figure 3 Sectional view along the BB direction;

[0023] Figure 6 This is a schematic diagram of the three-dimensional isometric projection structure of the single-tube spiral peristaltic pump in a specific embodiment of this utility model;

[0024] Figure 7 This is a schematic diagram of the three-dimensional axonometric projection structure of the single-tube spiral peristaltic pump without the left pump body in a specific embodiment of this utility model;

[0025] Legend: 1. Mounting plate; 2. Bearing housing; 3. Knurled screw; 4. Right pump body; 5. First bolt; 6. Left pump body; 7. Second bolt; 8. Flexible hose; 9. Mounting block; 10. Coupling; 11. Reducer; 12. Drive assembly; 13. Eccentric shaft; 14. Shaft retaining ring; 15. First deep groove ball bearing; 16. Second deep groove ball bearing; 17. Roller; 18. Third deep groove ball bearing; 19. Bearing end cap. 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 , Figure 6 and Figure 7As shown, the single-tube spiral peristaltic pump of this utility model includes a mounting plate 1, on which a drive mechanism, a rotating mechanism, a hose fixing mechanism, a roller pressing mechanism, and an elastic hose 8 are provided. The elastic hose 8 and the roller pressing mechanism are both housed within the hose fixing mechanism. A single elastic hose 8 is spirally wound, with a certain height difference between its inlet and outlet. The elastic hose 8 is located between the inner wall of the hose fixing mechanism and the roller pressing mechanism. The rotating mechanism includes an eccentric shaft 13, one end of which is connected to the drive mechanism, and the other end extends into the hose fixing mechanism and connects to the roller pressing mechanism. Driven by the drive mechanism, the eccentric shaft 13 drives the roller pressing mechanism to rotate and oscillate in a circumferential direction, cooperating with the hose fixing mechanism to squeeze or loosen the spirally wound elastic hose 8, thereby achieving continuous fluid delivery.

[0031] In this embodiment, both the flexible hose 8 and the roller pressing mechanism are housed within the hose fixing mechanism, with the flexible hose 8 arranged in a spiral shape within the hose fixing mechanism. One end of the eccentric shaft 13 is connected to the drive mechanism, and the other end is connected to the roller pressing mechanism. The drive mechanism drives the eccentric shaft 13 to rotate, which in turn drives the roller pressing mechanism to rotate and oscillate in a circumferential direction. The roller pressing mechanism cooperates with the hose fixing mechanism to achieve circumferential compression or release of the spiral-shaped flexible hose 8, thereby driving fluid to flow in from the inlet at the lower end of the flexible hose 8, spiral upward along the flexible hose 8, and out from the outlet at the upper end of the flexible hose 8, achieving continuous fluid filling. Furthermore, because the flexible hose 8 is only subjected to the oscillating rotation and pressure of the roller pressing mechanism in the circumferential direction, the compression wear is small, the wear degree of the inner wall of the flexible hose 8 is very low, the amount of particles generated is small, the filled fluid is not easily contaminated, and the application range is wide.

[0032] like Figure 5 As shown, the rotating mechanism also includes a mounting block 9, a coupling 10, and a bearing housing. One end of the bearing housing is fixedly connected to the mounting plate 1, and the other end is fixedly connected to the hose fixing mechanism. One end of the mounting block 9 is fixedly connected to the mounting plate 1 by screws, and the other end is fixedly connected to the drive mechanism, thus connecting the drive mechanism to the mounting plate 1. The coupling 10 is installed inside the mounting block 9. One end of the eccentric shaft 13 is connected to the output end of the drive mechanism through the coupling 10, and the other end of the eccentric shaft 13 passes through the mounting block 9, the mounting plate 1, and the bearing housing in sequence, extending into the hose fixing mechanism and connecting to the roller pressing mechanism.

[0033] like Figure 4As shown, the bearing housing includes a bearing housing 2, a shaft elastic retaining ring 14, a first deep groove ball bearing 15, and a second deep groove ball bearing 16. The bottom of the bearing housing 2 passes through the mounting plate 1 and is connected to the mounting block 9. The top of the bearing housing 2 is connected to the hose fixing mechanism. The bottom of the bearing housing 2 is provided with a shaft elastic retaining ring 14 and a first deep groove ball bearing 15 at the connection between it and the eccentric shaft 13. The top of the bearing housing 2 is provided with a second deep groove ball bearing 16 at the connection between it and the eccentric shaft 13 to ensure that the eccentric shaft 13 can rotate smoothly.

[0034] like Figure 3 , Figure 4 and Figure 7 As shown, the hose fixing mechanism includes a detachably connected right pump body 4 and left pump body 6. The left pump body 6 is fixed to the top of the bearing seat 2 by a second bolt 7, and the right pump body 4 and left pump body 6 are fixed together by knurled screws 3. This allows for quick clamping of the elastic hose 8 into a spiral shape, and the inlet and outlet of the elastic hose 8 are both located in the left pump body 6 for easy replacement. The inner walls of both the right pump body 4 and the left pump body 6 are provided with spiral grooves for installing the elastic hose 8, so as to achieve positioning and clamping of the elastic hose 8 and prevent movement during filling. The roller pressing mechanism is located in the cavity formed by the right pump body 4 and the left pump body 6. The roller pressing mechanism cooperates with the right pump body 4 and the left pump body 6 to compress the elastic hose 8.

[0035] like Figure 4 As shown, the roller pressing mechanism includes a roller 17, which is nested on an eccentric shaft 13. Third deep groove ball bearings 18 are provided at both ends of the roller 17 where it connects to the eccentric shaft 13. During each filling operation, the eccentric shaft 13 rotates, causing the roller 17 to rotate. Because the roller shaft is eccentric, the roller 17 oscillates as it rotates with the eccentric shaft 13, thus squeezing and releasing the elastic hose 8 in a circumferential direction. This allows fluid to flow in from the inlet at the lower end of the elastic hose 8, spiral upwards along the elastic hose 8, and flow out from the outlet at the upper end of the elastic hose 8, achieving continuous fluid filling.

[0036] like Figure 5 As shown, the roller pressing mechanism also includes a bearing end cap 19. The bearing end cap 19 is located at the ends of the eccentric shaft 13 and the roller 17, and is connected and fixed to the end of the eccentric shaft 13 by the first bolt 5 to prevent external impurities from falling into the hose fixing mechanism.

[0037] like Figure 4 and Figure 5As shown, the drive mechanism includes a reducer 11, a drive assembly 12, and an external PLC controller. The output end of the drive assembly 12 is connected to the reducer 11, and the reducer 11 is connected to the mounting block 9, thus connecting the drive assembly 12 to the mounting platform 1. Furthermore, the output end of the drive assembly 12 is connected to the coupling 10 via the reducer 11. The drive assembly 12 is electrically connected to the PLC controller, which controls the automatic operation of the drive assembly 12, such as controlling its start / stop, forward / reverse rotation, full speed, speed adjustment, and flow calibration, to improve the control accuracy of the filling process.

[0038] In this embodiment, the drive component 12 is a stepper motor. In other embodiments, the drive component 12 may also be a servo motor or a motor drive unit. The key is to ensure that the rotating mechanism can rotate smoothly, thereby enabling the roller pressing mechanism to smoothly compress the elastic hose 8.

[0039] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A single-tube spiral peristaltic pump, characterized in that, The system includes a mounting plate (1), on which a drive mechanism, a rotating mechanism, a hose fixing mechanism, a roller pressing mechanism, and an elastic hose (8) are provided. The elastic hose (8) and the roller pressing mechanism are both located within the hose fixing mechanism. The elastic hose (8) is spirally wound. The rotating mechanism includes an eccentric shaft (13). One end of the eccentric shaft (13) is connected to the drive mechanism, and the other end of the eccentric shaft (13) extends into the hose fixing mechanism and is connected to the roller pressing mechanism. Under the drive of the drive mechanism, the eccentric shaft (13) drives the roller pressing mechanism to rotate and swing in the circumferential direction, and cooperates with the hose fixing mechanism to squeeze or loosen the spirally wound elastic hose (8) to achieve continuous fluid delivery.

2. The single-tube spiral peristaltic pump according to claim 1, characterized in that, The rotating mechanism also includes a mounting block (9), a coupling (10), and a bearing housing. One end of the bearing housing is fixedly connected to the mounting plate (1), and the other end of the bearing housing is fixedly connected to the hose fixing mechanism. One end of the mounting block (9) is fixedly connected to the mounting plate (1), and the other end of the mounting block (9) is fixedly connected to the drive mechanism. The coupling (10) is installed inside the mounting block (9). One end of the eccentric shaft (13) is connected to the output end of the drive mechanism through the coupling (10). The other end of the eccentric shaft (13) passes through the mounting block (9), the mounting plate (1), and the bearing housing in sequence, and then extends into the hose fixing mechanism to connect with the roller pressing mechanism.

3. The single-tube spiral peristaltic pump according to claim 2, characterized in that, The bearing housing includes a bearing housing (2), a shaft elastic retaining ring (14), a first deep groove ball bearing (15), and a second deep groove ball bearing (16); the bottom of the bearing housing (2) passes through the mounting plate (1) and is connected to the mounting block (9); the top of the bearing housing (2) is connected to the hose fixing mechanism; the bottom of the bearing housing (2) is provided with a shaft elastic retaining ring (14) and a first deep groove ball bearing (15) at the connection between it and the eccentric shaft (13); and the top of the bearing housing (2) is provided with a second deep groove ball bearing (16) at the connection between it and the eccentric shaft (13).

4. The single-tube spiral peristaltic pump according to claim 3, characterized in that, The hose fixing mechanism includes a right pump body (4) and a left pump body (6). The left pump body (6) is fixed to the top of the bearing seat (2) by a second bolt (7). The right pump body (4) and the left pump body (6) are fixed to each other by knurled screws (3). The inner wall surfaces of the right pump body (4) and the left pump body (6) are provided with spiral grooves for installing the elastic hose (8). The roller pressing mechanism is located in the cavity formed by the right pump body (4) and the left pump body (6).

5. The single-tube spiral peristaltic pump according to claim 4, characterized in that, The roller pressing mechanism includes a roller (17), which is nested on an eccentric shaft (13). Both ends of the roller (17) are provided with a third deep groove ball bearing (18) at the connection between the roller (17) and the eccentric shaft (13). Under the drive of the driving mechanism, the eccentric shaft (13) drives the roller (17) to rotate and swing, so as to squeeze or release the elastic hose (8) in the circumferential direction.

6. The single-tube spiral peristaltic pump according to claim 5, characterized in that, The roller pressing mechanism also includes a bearing end cap (19), which is located at the ends of the eccentric shaft (13) and the roller (17) and is connected and fixed to the end of the eccentric shaft (13) by a first bolt (5).

7. The single-tube spiral peristaltic pump according to any one of claims 3 to 6, characterized in that, The drive mechanism includes a reducer (11) and a drive assembly (12). The output end of the drive assembly (12) is connected to the reducer (11). The reducer (11) is connected to the mounting block (9). The output end of the drive assembly (12) is connected to the coupling (10) through the reducer (11).

8. The single-tube spiral peristaltic pump according to claim 7, characterized in that, The drive mechanism also includes an external PLC controller. The drive component (12) is electrically connected to the PLC controller, and the PLC controller controls the drive component (12) to run automatically.

9. The single-tube spiral peristaltic pump according to claim 7, characterized in that, The drive component (12) is a stepper motor, a servo motor, or a motor drive unit.

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