Outward rotation type eccentric extrusion single-tube peristaltic pump

Abstract

The utility model discloses an outward rotation type eccentric extrusion single-tube peristaltic pump, which comprises a mounting bedplate, a driving mechanism, an eccentric rotation tube 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 spirally distributed on the outer side of the extrusion sleeve along the vertical direction; the eccentric rotating pipe pressing mechanism surrounds the outer side of the elastic hose and is connected with the output end of the driving mechanism. Under the driving of the driving mechanism, the eccentric rotating pipe pressing mechanism rotates and extrudes the spiral elastic hose arranged in the vertical direction so as to drive fluid to flow in from an inlet of the elastic hose and be conveyed to an outlet of the elastic hose, and continuous conveying of the 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, and the problems that in an existing peristaltic pump, due to the fact that the inner wall of the hose is seriously abraded, a large number of particles are generated, fluid is polluted, and the continuous filling precision is low are solved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of fluid filling pump, specifically relates to an eccentric extrusion single-pipe peristaltic pump of outer rotation type. BACKGROUND

[0002] The peristaltic pump is a liquid delivery device capable of controlling flow rate, and the peristaltic pump rolls and presses a soft tube with elasticity by using a rotating roller, and the fluid in the soft tube moves along with the rotation of the roller, just like squeezing the soft tube with two fingers, and along with the movement of the fingers, the liquid flows.

[0003] The existing peristaltic pump rolls and presses the soft tube to discharge the fluid by means of the roller assembly with a rotating device, and for the same soft tube, the roller squeezes or rolls the soft tube at the same position every time, and the inner wall of the soft tube will be seriously worn and a large number of particles will be generated, which will cause the fluid to be contaminated.

[0004] The existing peristaltic pump controls the rolling and extruding amount of the fluid by the number of turns or the angle of the roller assembly, and for each filling, the initial position and the end position of the roller assembly rolling the soft tube will not be at the same position due to the accumulation of the number of turns or the angle, and in addition, the elastic recovery of the soft tube at different positions also has differences, so that the continuous filling accuracy of the traditional peristaltic pump is difficult to achieve the expected effect. TECHNICAL CONTENT

[0005] The utility model solves the technical problems that the existing peristaltic pump causes the fluid to be contaminated due to the serious wear of the inner wall of the soft tube and the generation of a large number of particles during fluid transmission, and the continuous filling accuracy is low, and provides an eccentric extrusion single-pipe peristaltic pump of outer rotation type, which has compact structure, convenient disassembly and assembly, high reliability, low wear of the inner wall of the soft tube, high continuous filling accuracy and low cost.

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

[0007] An eccentric extrusion single-pipe peristaltic pump of outer rotation type comprises a mounting plate, a driving mechanism, an eccentric rotating tube pressing mechanism and a pipeline mechanism are arranged on the mounting plate, the pipeline mechanism comprises an extrusion sleeve and an elastic soft tube, and the elastic soft tube is spirally arranged on the outer side of the extrusion sleeve in the vertical direction; the eccentric rotating tube pressing mechanism is enclosed outside the elastic soft tube and connected with the output end of the driving mechanism; under the driving of the driving mechanism, the eccentric rotating tube pressing mechanism rotates and extrudes the spiral elastic soft tube arranged in the vertical direction, so as to drive the fluid to flow into the inlet of the elastic soft tube and be transported to the outlet of the elastic soft tube, and realize continuous fluid delivery.

[0008] As a further improvement of this utility model, the eccentric rotary compression mechanism includes: a rear eccentric block, a rotary seat, and a front eccentric block; one end of the rotary seat passes through the mounting plate and is connected to the output end of the drive mechanism, and the other end of the rotary seat is connected to the compression sleeve; the rear eccentric block is fixed on the rotary seat, and the front eccentric block is detachably mounted on the rotary seat; the rear eccentric block and the front eccentric block surround the outer side of the elastic hose; under the drive of the drive mechanism, the rotary seat drives the rear eccentric block and the front eccentric block to rotate and compress the elastic hose.

[0009] As a further improvement of this utility model, the eccentric rotary pressing mechanism also includes fasteners, and the rear eccentric block and the front eccentric block are detachably connected by fasteners.

[0010] As a further improvement of this utility model, a first deep groove ball bearing is provided at the connection between the rotating seat and the extrusion sleeve, and a second deep groove ball bearing is provided at the connection between the rotating seat and the mounting plate.

[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 rear eccentric block and the front eccentric block to realize that the arc length of the single-turn 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 rear eccentric block. The traction rod has an L-shaped structure, one end of the traction rod is connected to the mounting plate, the other end of the traction rod is connected to the compression sleeve, and the traction rod is provided with a second positioning notch corresponding to the first positioning notch, so as to assist 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 eccentric rotary pressing 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 externally rotating eccentric compression single-tube peristaltic pump. An elastic hose is spirally arranged vertically outside the compression sleeve, and an eccentric rotating compression mechanism is enclosed on the outside of the elastic hose. The eccentric rotating compression mechanism is connected to the output end of a drive mechanism. The drive mechanism drives the eccentric rotating compression mechanism to rotate, and the eccentric rotating compression mechanism cooperates with the compression sleeve to compress the spirally arranged elastic hose vertically. This causes fluid to flow in from the inlet of the elastic hose and be transported to the outlet, achieving continuous fluid delivery. This design minimizes wear on the elastic hose caused by the compression mechanism, avoids the risk of fluid contamination due to severe wear on the inner wall of the hose and the generation of numerous particles, and effectively extends the service life of the elastic hose. Because a portion of the elastic hose is always under compression during the rotation of the compression mechanism, it achieves high-precision, large-capacity continuous filling. Attached Figure Description

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

[0020] Figure 2 This is a top view schematic diagram of the externally rotating eccentric extrusion single-tube peristaltic pump in a specific embodiment of this utility model.

[0021] Figure 3 for Figure 1 A schematic diagram of the structural principle of the cross-section along the AA direction.

[0022] Figure 4 This is a schematic diagram of the main structural principle of the externally rotating eccentric extrusion single-tube peristaltic pump without the front eccentric block in a specific embodiment of this utility model.

[0023] Figure 5 This is a schematic diagram of the left-side structure of the externally rotating eccentric extrusion single-tube peristaltic pump without the front eccentric block in a specific embodiment of this utility model.

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

[0025] Figure 7 This is a schematic diagram of the three-dimensional axonometric projection structure of the externally rotating eccentric extrusion single-tube peristaltic pump without the front eccentric block in a specific embodiment of this utility model.

[0026] Legend: 1. Extrusion sleeve; 2. Flexible hose; 3. Rear eccentric block; 4. First deep groove ball bearing; 5. Rotary seat; 6. Waterproof retaining ring; 7. O-ring seal; 8. Second deep groove ball bearing; 9. Mounting platform; 10. Reducer; 11. Drive assembly; 12. Traction rod; 13. Spring washer; 14. Bolt; 15. Front eccentric block; 16. Fastener; 17. First positioning notch; 18. Clearance notch; 19. Mounting notch; 20. Second positioning notch. Detailed Implementation

[0027] 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.

[0028] 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.

[0029] 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.

[0030] Example

[0031] like Figure 1 , Figure 2 , Figure 6 and Figure 7 As shown, the externally rotating eccentric compression single-tube peristaltic pump of this utility model includes a mounting plate 9, on which a drive mechanism, an eccentric rotating compression mechanism, and a pipeline mechanism are provided. The pipeline mechanism includes a compression sleeve 1 and an elastic hose 2. The elastic hose 2 is spirally arranged vertically on the outer side of the compression sleeve 1. The eccentric rotating compression mechanism surrounds the outer side of the elastic hose 2 and is connected to the output end of the drive mechanism. Driven by the drive mechanism, the eccentric rotating compression mechanism rotates and compresses the vertically arranged spiral elastic hose 2, thereby driving fluid to flow in from the inlet of the elastic hose 2 and be transported to the outlet of the elastic hose 2, realizing continuous fluid transport.

[0032] In this embodiment, a single elastic hose 2 is spirally arranged vertically outside the compression sleeve 1, and an eccentric rotating compression mechanism is enclosed outside the elastic hose 2. The eccentric rotating compression mechanism is connected to the output end of the drive mechanism. The drive mechanism drives the eccentric rotating compression mechanism to rotate, and the eccentric rotating compression mechanism cooperates with the compression sleeve 1, thereby realizing the compression of the spirally arranged elastic hose 2 in the vertical direction. This causes fluid to flow in from the inlet of the elastic hose 2 and be transported to the outlet of the elastic hose 2, achieving the purpose of continuous fluid transport. This ensures that the wear of the compression mechanism on the elastic hose 2 is minimized, avoids 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, and effectively extends the service life of the elastic hose 2. Since a part of the elastic hose 2 is always in a compression state during the rotation of the compression mechanism, the purpose of high-precision and large-capacity continuous filling is achieved.

[0033] like Figure 2 and Figure 3 As shown, the eccentric rotary compression mechanism includes a rear eccentric block 3, a rotating seat 5, and a front eccentric block 15. One end of the rotating seat 5 passes through the mounting plate 9 and is connected to the output end of the drive mechanism. The other end of the rotating seat 5 is connected to the compression sleeve 1. The rear eccentric block 3 is fixed on the rotating seat 5, and the front eccentric block 15 is detachably mounted on the rotating seat 5. The rear eccentric block 3 and the front eccentric block 15 surround the outer side of the elastic hose 2. Driven by the drive mechanism, the rotating seat 5 drives the rear eccentric block 3 and the front eccentric block 15 to rotate, thus compressing the elastic hose 2.

[0034] like Figure 2 and Figure 6 As shown, the eccentric rotary compression mechanism also includes a fastener 16, through which the rear eccentric block 3 and the front eccentric block 15 are detachably connected. This detachable connection facilitates the installation of the flexible hose 2 on the outside of the compression sleeve 1 and also enables routine maintenance. The fastener 16 can be a knurled screw, or other screws or bolts that allow for easy and quick assembly and disassembly.

[0035] like Figure 3 As shown, a positioning groove is provided on the outside of the rotating seat 5. The rear eccentric block 3 and the front eccentric block 15 are installed in the positioning groove to ensure that the rear eccentric block 3 and the front eccentric block 15 rotate along a predetermined trajectory, which is beneficial to improving the filling accuracy.

[0036] like Figure 3 and Figure 5 As shown, a first deep groove ball bearing 4 is provided at the connection between the rotating seat 5 and the extrusion sleeve 1, and a second deep groove ball bearing 8 is provided at the connection between the rotating seat 5 and the mounting plate 9, to ensure that the rotating seat 5 can rotate smoothly.

[0037] like Figure 3 andFigure 4 As shown, a waterproof retaining ring 6 is provided between the rotating seat 5 and the mounting plate 9. The waterproof retaining ring 6 is connected and fixed to the mounting plate 9 by screws, and an O-ring seal 7 is provided between the waterproof retaining ring 6 and the mounting plate 9 to prevent the inner side of the rotating seat 5 from being contaminated.

[0038] like Figure 6 and Figure 7 As shown, the end of the compression sleeve 1 is provided with a first positioning notch 17 and an installation notch 19. The first positioning notch 17 and the installation notch 19 are arranged opposite to each other. The elastic hose 2 enters and exits the compression sleeve 1 through the first positioning notch 17, and after passing through the installation notch 19, the elastic hose 2 is spirally arranged on the outside of the compression sleeve 1. With the assistance of the first positioning notch 17 and the installation notch 19, the reliability of the installation of the elastic hose 2 is improved, and the elastic hose 2 is prevented from shifting during the compression process.

[0039] like Figure 3 As shown, the outer side of the extrusion sleeve 1 is provided with multiple spiral clearance notches 18 along the vertical direction. The clearance notches 18 cooperate with the rear eccentric block 3 and the front eccentric block 15 to ensure that the arc length of the single-turn elastic hose 2 being rotated and squeezed in the circumferential direction is not less than 180°. During each filling, the rear eccentric block 3 and the front eccentric block 15 on the outer circumference of the extrusion sleeve 1 rotate and squeeze the elastic hose 2 arranged on the extrusion sleeve 1, pushing the fluid to spirally descend from the inlet of the elastic hose 2 and then rise from the outlet of the elastic hose 2, flowing through the entire elastic hose 2 to achieve continuous fluid delivery.

[0040] like Figure 4 , Figure 5 and Figure 6 As shown, the piping mechanism also includes a traction rod 12 located outside the rear eccentric block 3. The traction rod 12 has an L-shaped structure. The bottom end of the traction rod 12 is connected and fixed to the mounting plate 9 by fastening screws. The top end of the traction rod 12 crosses the top of the rear eccentric block 3 and is then connected and fixed to the top of the compression sleeve 1 by spring washers 13 and bolts 14. The upper part of the traction rod 12 is provided with a second positioning notch 20 corresponding to the first positioning notch 17, to assist in the positioning and installation of the elastic hose 2 and improve the stability of the installation of the elastic hose 2. Figure 2 As shown, the traction rod 12 is coaxially arranged with the compression sleeve 1, and there is a gap L between the center and the side of the traction rod 12, which facilitates the installation of the elastic hose 2.

[0041] like Figure 1 and Figure 3As shown, the drive mechanism includes a reducer 10, a drive assembly 11, and an external PLC controller. The drive assembly 11 is mounted on the mounting plate 9, and its output is connected to the rotary base 5 via the reducer 10. The drive assembly 11 and the PLC controller are electrically connected, and the PLC controller controls the operation of the drive assembly 11, such as controlling its start / stop, forward / reverse rotation, full speed, speed adjustment, and flow calibration, to improve the control accuracy of filling.

[0042] In this embodiment, the drive component 11 is a stepper motor. In other embodiments, the drive component 11 may also be a servo motor or a motor drive unit. As long as it can drive the rotating seat 5 to rotate smoothly, so that the rear eccentric block 3 and the front eccentric block 15 can smoothly compress the elastic hose 2, it is acceptable.

[0043] 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 externally rotating eccentric extrusion single-tube peristaltic pump, characterized in that, The system includes a mounting plate (9), on which a drive mechanism, an eccentric rotary pressing mechanism, and a pipe mechanism are provided. The pipe mechanism includes a compression sleeve (1) and an elastic hose (2). The elastic hose (2) is spirally arranged on the outside of the compression sleeve (1) in the vertical direction. The eccentric rotary pressing mechanism surrounds the elastic hose (2) and is connected to the output end of the drive mechanism. Under the drive of the drive mechanism, the eccentric rotary pressing mechanism rotates and squeezes the spiral elastic hose (2) arranged in the vertical direction, so as to drive the fluid to flow in from the inlet of the elastic hose (2) and be transported to the outlet of the elastic hose (2), thereby realizing continuous fluid transport.

2. The externally rotating eccentric extrusion single-tube peristaltic pump according to claim 1, characterized in that, The eccentric rotary compression mechanism includes: a rear eccentric block (3), a rotary seat (5), and a front eccentric block (15); one end of the rotary seat (5) passes through the mounting plate (9) and is connected to the output end of the drive mechanism, and the other end of the rotary seat (5) is connected to the compression sleeve (1). The rear eccentric block (3) is fixed on the rotary seat (5), and the front eccentric block (15) is detachably mounted on the rotary seat (5). The rear eccentric block (3) and the front eccentric block (15) surround the outside of the elastic hose (2). Under the drive of the drive mechanism, the rotary seat (5) drives the rear eccentric block (3) and the front eccentric block (15) to rotate and compress the elastic hose (2).

3. The externally rotating eccentric extrusion single-tube peristaltic pump according to claim 2, characterized in that, The eccentric rotary pressing mechanism also includes a fastener (16), and the rear eccentric block (3) and the front eccentric block (15) are detachably connected by the fastener (16).

4. The externally rotating eccentric extrusion single-tube peristaltic pump according to claim 2, characterized in that, A first deep groove ball bearing (4) is provided at the connection between the rotating seat (5) and the extrusion sleeve (1), and a second deep groove ball bearing (8) is provided at the connection between the rotating seat (5) and the mounting plate (9).

5. The externally rotating eccentric extrusion single-tube peristaltic pump according to claim 2, characterized in that, The end of the compression sleeve (1) is provided with a first positioning notch (17) and an installation notch (19). The first positioning notch (17) and the installation notch (19) are arranged opposite to each other. The elastic hose (2) enters and exits the compression sleeve (1) through the first positioning notch (17). After passing through the installation notch (19), the elastic hose (2) is spirally arranged on the outside of the compression sleeve (1).

6. The externally rotating eccentric extrusion single-tube peristaltic pump according to claim 5, characterized in that, The outer side of the compression sleeve (1) is provided with multiple spiral clearance notches (18) in the vertical direction; the clearance notches (18) cooperate with the rear eccentric block (3) and the front eccentric block (15) to realize that the arc length of the single-turn elastic hose (2) being rotated and compressed in the circumferential direction is not less than 180°.

7. The externally rotating eccentric extrusion single-tube peristaltic pump according to claim 6, characterized in that, The pipeline mechanism also includes a traction rod (12) located outside the rear eccentric block (3). The traction rod (12) has an L-shaped structure. One end of the traction rod (12) is connected to the mounting plate (9), and the other end of the traction rod (12) is connected to the compression sleeve (1). The traction rod (12) is provided with a second positioning notch (20) corresponding to the first positioning notch (17) to assist in the positioning and installation of the elastic hose (2).

8. The externally rotating eccentric extrusion single-tube peristaltic pump according to any one of claims 2 to 7, characterized in that, A waterproof retaining ring (6) is provided between the rotating seat (5) and the mounting plate (9), and an O-ring (7) is provided between the waterproof retaining ring (6) and the mounting plate (9).

9. The externally rotating eccentric extrusion single-tube peristaltic pump according to any one of claims 1 to 7, characterized in that, The drive mechanism includes a reducer (10), a drive assembly (11), and an external PLC controller; the drive assembly (11) is mounted on the mounting plate (9), and the output end of the drive assembly (11) is connected to the eccentric rotary pressing mechanism through the reducer (10); the drive assembly (11) and the PLC controller are electrically connected, and the PLC controller controls the operation of the drive assembly (11).

10. The externally rotating eccentric extrusion single-tube peristaltic pump according to claim 9, characterized in that, The drive component (11) is a stepper motor, a servo motor, or a motor drive unit.

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