A dual-roller radial continuous rotary peristaltic pump

Abstract

This invention discloses a dual-roller radial continuous rotary peristaltic pump, comprising a drive mechanism, a rotation mechanism, a hose mechanism, and a compression mechanism on a mounting plate. The hose mechanism includes an elastic hose, a cam, and a support plate. The support plate is connected to a bearing seat and the cam, respectively. The bearing seat is connected to the mounting plate, and the elastic hose radially surrounds the outer periphery of the cam. The compression mechanism includes rollers and a guide assembly. The guide assembly is connected to the rollers and the rotation mechanism, respectively. The rollers are symmetrically arranged on both sides of the elastic hose. The rotation mechanism is connected to the drive mechanism, which drives the rotation mechanism to rotate. The rotation mechanism drives the guide assembly to rotate, and the rollers mounted on the guide assembly rotate radially and compress the elastic hose, achieving continuous fluid metering and delivery. This invention has advantages such as compact structure, high reliability, and low wear on the inner wall of the hose, solving the problem of fluid contamination caused by severe wear on the inner wall of the hose and the generation of a large number of particles in existing peristaltic pumps.

Description

Technical Field

[0001] This invention belongs to the field of peristaltic pump technology for fluid filling, and specifically relates to a dual-roller radial continuous rotation 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. Summary of the Invention

[0005] The technical problem to be solved by the present invention 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, and the narrow filling range. The present invention provides a double roller radial continuous rotation 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 accuracy of repeated filling, and a wide range of single filling flow rates.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] A dual-roller radial continuous rotary peristaltic pump includes a mounting platform. The mounting platform is equipped with a drive mechanism, a rotation mechanism, a hose mechanism, and a hose pressing mechanism. The hose mechanism includes a flexible hose, a cam, and a support plate. The cam includes a thick-walled region and a thin-walled region. One end of the support plate is connected to a bearing seat, which is connected to the mounting platform. The other end of the support plate is connected to the cam. The hose pressing mechanism includes rollers and a guide assembly. The guide assembly is connected to the rotation mechanism, and the rollers are connected to the guide assembly. The flexible hose is radially fixed around the outer periphery of the cam, and the rollers are symmetrically arranged on the flexible hose. The elastic hose is positioned on opposite sides; or, the cam is positioned on the side of the roller, the elastic hose is radially fixed around the support wheel, the support wheel is connected and fixed to the support plate, and the rollers are symmetrically arranged on opposite sides of the elastic hose; the rotating mechanism is mounted on the bearing seat and connected to the output end of the drive mechanism, the drive mechanism drives the rotating mechanism to rotate, the rotating mechanism drives the guide assembly to rotate, the roller mounted on the guide assembly rotates radially in a circular motion, when the roller rotates to the thick-walled area of ​​the cam, the roller squeezes the elastic hose, when the roller rotates to the thin-walled area of ​​the cam, the roller releases the elastic hose.

[0008] As a further improvement of the present invention, the driving mechanism includes a driving component and an external PLC controller; the driving component is mounted on a mounting plate, and the output end of the driving component is connected to the rotating mechanism; the driving component and the PLC controller are electrically connected, and the PLC controller controls the operation of the driving component.

[0009] As a further improvement of the present invention, the rotating mechanism includes a rotating shaft, the output shaft of the drive assembly passes through the mounting plate and the bearing seat and is connected to one end of the rotating shaft, the other end of the rotating shaft is connected to the guide assembly, the bearing seat is nested on the outer periphery of the rotating shaft and is located between the mounting plate and the guide assembly.

[0010] As a further improvement of the present invention, one end of the bearing housing is fixedly connected to the mounting plate, and the other end of the bearing housing is detachably connected to the end cover. A first deep groove ball bearing and a second deep groove ball bearing are nested between the bearing housing and the rotating shaft in sequence. The first deep groove ball bearing is close to the output shaft of the drive assembly, and the first deep groove ball bearing and the second deep groove ball bearing are provided with bushings. A shaft elastic retaining ring is provided between the end of the first deep groove ball bearing and the end of the rotating shaft.

[0011] As a further improvement of the present invention, the guide assembly includes a left guide block and a right guide block with the same structure. The left guide block and the right guide block are symmetrically arranged on both sides of the rotating shaft, and the left guide block and the right guide block are arranged on the rotating shaft in pairs. The left guide block and the right guide block are each provided with rollers, which are located on opposite sides of the elastic hose to realize the double roller compression of the elastic hose.

[0012] As a further improvement of the present invention, both the left guide block and the right guide block are detachably connected to the rotating shaft via screws, and pads are provided between the left guide block and the rotating shaft, and between the right guide block and the rotating shaft; the roller is connected to the left guide block via a roller shaft, and the roller shaft is locked and fixed to the left guide block via a nut.

[0013] As a further improvement of the present invention, the left guide block is provided with a third deep groove ball bearing and a pin. The third deep groove ball bearing is connected to the left guide block through the pin. The third deep groove ball bearing and the roller are respectively located on both sides of the left guide block, and the third deep groove ball bearing is located in front of the roller. The third deep groove ball bearing rotates along the edge of the cam. The right guide block is provided with a third deep groove ball bearing and a pin. The third deep groove ball bearing is connected to the right guide block through the pin. The third deep groove ball bearing and the roller are respectively located on both sides of the right guide block, and the third deep groove ball bearing is located in front of the roller. The third deep groove ball bearing rotates along the edge of the cam.

[0014] As a further improvement of the present invention, the ends of the two left guide blocks and the ends of the two right guide blocks are connected by tension springs, and the tension springs are close to the third deep groove ball bearing; or, the ends of the two left guide blocks and the ends of the two right guide blocks are connected by compression springs, and the compression springs are close to the third deep groove ball bearing.

[0015] As a further improvement of the present invention, the hose mechanism further includes a first limiting block and a second limiting block, which are symmetrically arranged on both sides of the support plate to assist in clamping and positioning the input and output ends of the elastic hose.

[0016] As a further improvement of the present invention, the cam has a circular ring structure, and the circumferential angle β of the thin-walled region of the cam is 80°±40°; the drive component adopts a stepper motor or a servo motor.

[0017] As a further improvement of the present invention, the flexible hose consists of two hoses, with their ends connected via tee connectors. The rotating mechanism is alternately equipped with multiple sets of compression mechanisms. The driving mechanism drives the rotating mechanism to rotate, which in turn drives the compression mechanisms to rotate. These multiple compression mechanisms alternately and in a staggered manner compress the two flexible hoses, achieving low-pulsation fluid filling. Compared with the prior art, the advantages of the present invention are:

[0018] The present invention relates to a dual-roller radial continuous rotary peristaltic pump, which comprises a drive mechanism, a rotation mechanism, a hose mechanism, and a compression mechanism on a mounting plate, forming a compact peristaltic pump body. Specifically, a cam with varying thickness in local areas is used to radially fix the elastic hose. Rollers are symmetrically arranged on opposite sides of the elastic hose, and the rollers are connected to the rotation mechanism via a guide assembly. The rotation mechanism is connected to the output end of the drive mechanism. The drive mechanism drives the rotation mechanism to rotate, which in turn drives the guide assembly to rotate. The rollers mounted on the guide assembly rotate radially in a circular motion. When the rollers rotate to the thick-walled area of ​​the cam, they compress the elastic hose to achieve fluid metering and delivery. When the roller rotates to the thin-walled area of ​​the cam, the roller releases the elastic hose, which can periodically recover its elasticity. Because the elastic hose is squeezed by the synchronous radial rotation of the two rollers, the shearing of the liquid molecules during filling and the wear on the hose are minimized. This 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, effectively extending the service life of the pump tube. Since the initial position of the roller is the same for each fluid filling, the accuracy of repeated filling can be greatly improved. Moreover, as long as the wall thickness of the elastic hose is consistent, regardless of the inner diameter of the hose, it can be directly installed on the equipment for fluid filling, achieving the goal of peristaltic pumps not being limited by the flow range for a single delivery. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the main structural principle of a dual-roller radially continuously rotating peristaltic pump in a specific embodiment of the present invention.

[0020] Figure 2 for Figure 1 A schematic diagram of the structural principle of a double-roller radially continuous rotating peristaltic pump (left view).

[0021] Figure 3 for Figure 1 A schematic diagram of the structural principle of a horizontally slicing downwards from the center of rotation.

[0022] Figure 4 for Figure 1 A schematic diagram of the structural principle of a structure cut to the left in the vertical direction from the center of rotation.

[0023] Figure 5 This is a schematic diagram of the three-dimensional isometric projection structure of a dual-roller radially continuously rotating peristaltic pump in a specific embodiment of the present invention.

[0024] Figure 6 This is a side view schematic diagram of the radial continuous rotation peristaltic pump with two double rollers in a specific embodiment of the present invention.

[0025] Figure 7This is a schematic diagram of the three-dimensional isometric projection structure of the double-roller radially continuously rotating peristaltic pump in a specific embodiment of the present invention.

[0026] Figure 8 This is a side view schematic diagram of the radial continuous rotation peristaltic pump with three double rollers in a specific embodiment of the present invention.

[0027] Figure 9 This is a schematic diagram of the three-dimensional isometric projection structure of the three-dimensional continuous radial rotation peristaltic pump with three double rollers in a specific embodiment of the present invention.

[0028] Legend: 1. Bearing housing; 2. Shaft retaining ring; 3. First deep groove ball bearing; 4. Bushing; 5. Second deep groove ball bearing; 6. End cap; 7. Flexible hose; 8. Cam; 9. Screw; 10. Rotating shaft; 11. Roller; 12. Mounting platform; 13. Drive assembly; 14. Roller shaft; 15. Left guide block; 16. Nut; 18. Third deep groove ball bearing; 19. Pin; 20. Washer; 21. Cotter pin; 22. Tension spring; 23. Right guide block; 24. First limit block; 25. Support plate; 26. Second limit block; 27. Pad; 28. Compression spring; 29. ​​Support wheel. Detailed Implementation

[0029] 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.

[0030] In the description of this invention, it should be understood that the terms "side", "center", "longitudinal", "lateral", "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 invention and simplifying the description, and are not intended to 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 invention.

[0031] 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 invention, "a plurality of" means two or more unless otherwise explicitly specified.

[0032] Example 1

[0033] like Figures 1 to 5As shown, the dual-roller radial continuous rotary peristaltic pump of the present invention includes a radially arranged mounting plate 12, on which a drive mechanism, a rotation mechanism, a hose mechanism, and a pressing mechanism are provided. The hose mechanism includes an elastic hose 7, a cam 8, and a support plate 25. The cam includes a thick-walled region and a thin-walled region. The support plate 25 is arranged horizontally, with one end connected to a bearing seat 1, which is connected to the mounting plate 12. The other end of the support plate 25 is connected to the cam 8, which is arranged radially. The mounting plate 12 and the cam 8 are parallel to each other. The elastic hose 7 is radially fixed around the outer periphery of the cam 8. The pressing mechanism includes rollers 11 and a guide assembly. The guide assembly is connected to the rotation mechanism, and the rollers 11 are connected to the guide assembly. The rollers 11 are symmetrically arranged on opposite sides of the elastic hose 7. The rotating mechanism is mounted on the bearing housing 1 and connected to the output end of the drive mechanism. The drive mechanism drives the rotating mechanism to rotate, and the rotating mechanism drives the guide assembly to rotate. The roller 11 mounted on the guide assembly rotates radially. When the roller 11 rotates to the thick-walled area of ​​the cam 8, the roller 11 squeezes the elastic hose 7. When the roller 11 rotates to the thin-walled area of ​​the cam 8, the roller 11 releases the elastic hose 7.

[0034] In this embodiment, a compact peristaltic pump body is formed by setting a drive mechanism, a rotating mechanism, a hose mechanism, and a pressing mechanism on the mounting plate 12. Specifically, the elastic hose 7 is radially fixed by using a cam 8 with inconsistent thickness in a local area. Rollers 11 are symmetrically arranged on opposite sides of the elastic hose 7, and the rollers 11 are connected to the rotating mechanism through a guide assembly. The rotating mechanism is connected to the output end of the drive mechanism. The drive mechanism drives the rotating mechanism to rotate, and the rotating mechanism drives the guide assembly to rotate. The rollers 11 mounted on the guide assembly rotate radially. When the rollers 11 rotate to the thick-walled area of ​​the cam 8, the rollers 11 squeeze the elastic hose 7 to achieve fluid metering and delivery. When roller 11 rotates to the thin-walled area of ​​cam 8, roller 11 releases the elastic hose 7. The elastic hose 7 can periodically recover its elasticity. Because the elastic hose is squeezed by the synchronous radial rotation of the two rollers, the shearing of the liquid molecules during filling and the wear on the hose can be minimized. This 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, effectively extending the service life of the pump tube. Since the initial position of the roller is the same for each fluid filling, the accuracy of repeated filling can be greatly improved. Moreover, as long as the wall thickness of the elastic hose 7 is consistent, regardless of the inner diameter of the hose, it can be directly installed on the equipment for fluid filling, achieving the purpose of the peristaltic pump's single delivery without being limited by the flow range.

[0035] like Figure 5As shown, in this embodiment, the drive mechanism includes a drive assembly 13 and an external PLC controller (not shown in the figure). The drive assembly 13 is mounted on the mounting plate 12, and its output is connected to the rotating mechanism. The drive assembly and the PLC controller are electrically connected, and the PLC controller controls the operation of the drive assembly 13. The start / stop, forward / reverse rotation, speed, and flow rate calibration of the drive assembly are all controlled by the PLC control system and program control of the drive assembly 13, which has the advantages of simple operation and precise control. Furthermore, the drive assembly 13 can specifically be a stepper motor or a servo motor, or other type of motor or drive unit, as long as it can drive the rotating mechanism to rotate smoothly and realize the smooth compression of the elastic hose 7 by the roller 11.

[0036] like Figure 2 , Figure 3 and Figure 4 As shown, the rotating mechanism includes a rotating shaft 10. The output shaft of the drive assembly 13 passes through the mounting plate 12 and is connected to one end of the rotating shaft 10. The output shaft of the drive assembly 13 is nested inside the end of the rotating shaft 10. The other end of the rotating shaft 10 is connected to the guide assembly. The bearing seat 1 is nested on the outer periphery of the rotating shaft 10 and is located between the mounting plate 12 and the guide assembly.

[0037] like Figure 3 and Figure 4 As shown, one end of the bearing housing 1 is fixedly connected to the mounting plate 12, and the other end of the bearing housing 1 is detachably connected to the end cover 6. A first deep groove ball bearing 3 and a second deep groove ball bearing 5 are nested sequentially between the bearing housing 1 and the rotating shaft 10. The first deep groove ball bearing 3 is close to the output shaft of the drive assembly 13, and the second deep groove ball bearing 5 is close to the guide assembly. Both the first deep groove ball bearing 3 and the second deep groove ball bearing 5 are provided with bushings 4. The arrangement of the deep groove ball bearings and bushings 4 improves the smoothness of the transmission. A shaft elastic retaining ring 2 is provided between the end of the first deep groove ball bearing 3 and the end of the rotating shaft 10 to prevent the first deep groove ball bearing 3 from slipping off the outside of the rotating shaft 10.

[0038] like Figure 1 , Figure 2 and Figure 5 As shown, the guide assembly includes a left guide block 15 and a right guide block 23 with identical structures. The left guide block 15 and the right guide block 23 are symmetrically arranged on both sides of the rotating shaft 10, and the left guide block 15 and the right guide block 23 are arranged in pairs on the rotating shaft 10. Both the left guide block 15 and the right guide block 23 are equipped with rollers 11, which are located on opposite sides of the elastic hose 7. That is, two sets of double rollers are arranged on the rotating shaft 10 to realize the double rollers squeezing the elastic hose 7 and complete the continuous metering and delivery of fluid.

[0039] like Figure 1As shown, both the left guide block 15 and the right guide block 23 are detachably connected to the rotating shaft 10 via screws 9. Pads 27 are provided between the left guide block 15 and the rotating shaft 10, and between the right guide block 23 and the rotating shaft 10, to provide flexible cushioning and prevent wear caused by a direct rigid connection between the guide blocks and the rotating shaft 10. The roller 11 is connected to the left guide block 15 via a roller shaft 14, which passes through both the roller 11 and the left guide block 15. The roller shaft 14 is locked to the left guide block 15 by a nut 16, thus achieving a detachable connection between the roller 11 and the left guide block 15. The connection between the roller 11 and the right guide block 23 is based on the same principle.

[0040] like Figure 1 As shown, the left guide block 15 is equipped with a third deep groove ball bearing 18 and a pin 19. The third deep groove ball bearing 18 is connected to the left guide block 15 via the pin 19. The pin 19 passes through the third deep groove ball bearing 18 and the left guide block 15 in sequence, and is locked and fixed to the left guide block 15 by a cotter pin 21. A washer 20 is provided between the third deep groove ball bearing 18 and the left guide block 15 to provide flexible cushioning and ensure smooth rotation of the third deep groove ball bearing 18. The third deep groove ball bearing 18 and the roller 11 are located on both sides of the left guide block 15. When the peristaltic pump is running, the third deep groove ball bearing 18 is located in front of the roller 11 and rotates along the edge of the cam 8 to assist in the positioning of the left guide block 15 and improve the accuracy of the roller 11 in squeezing the elastic hose 7. The right guide block 23 is equipped with a third deep groove ball bearing 18 and a pin 19. The third deep groove ball bearing 18 is connected to the right guide block 23 via the pin 19. The pin 19 passes through the third deep groove ball bearing 18 and the right guide block 23 in sequence, and is locked and fixed to the left guide block 15 by a cotter pin 21. A washer 20 is provided between the third deep groove ball bearing 18 and the right guide block 23. The third deep groove ball bearing 18 and the roller 11 are located on both sides of the right guide block 23. When the peristaltic pump is running, the third deep groove ball bearing 18 rotates along the edge of the cam 8 to assist in the positioning of the right guide block 23 and improve the accuracy of the roller 11 in squeezing the elastic hose 7.

[0041] During the operation of the peristaltic pump, under the action of the tension spring 22, the third deep groove ball bearing 18 squeezes the cam 8 or disengages from the cam 8. The rotating shaft 10 drives the left guide block 15 and the right guide block 23 to rotate around the screw 9 as the rotation center, so as to realize the radial rotation of the double rollers to squeeze or disengage the elastic hose 7.

[0042] like Figure 1 As shown, the ends of the two left guide blocks 15 and the ends of the two right guide blocks 23 are connected by tension springs 22, and the tension springs 22 are close to the third deep groove ball bearing 18.

[0043] like Figure 1 and Figure 5 As shown, the hose mechanism also includes a first limiting block 24 and a second limiting block 26. The first limiting block 24 and the second limiting block 26 are symmetrically arranged on both sides of the support plate 25 to assist in clamping and positioning the input and output ends of the elastic hose 7. Through the combined action of the support plate 25, the first limiting block 24, the second limiting block 26, and the cam 8, the elastic hose 7 is positioned and clamped, preventing movement during the filling process.

[0044] like Figure 1 As shown, in this embodiment, the cam 8 has a circular ring structure, and the circumferential angle β of the thin-walled region of the cam 8 is approximately 80°. Therefore, the circumferential angle of the thin-walled region of the cam 8 is approximately 280°. The initial and final positions of the elastic hose 7 are the same each time it is squeezed, enabling high-precision continuous filling with the same initial position, which greatly improves the repeatability of the peristaltic pump. Moreover, as long as the elastic hose 7 has the same wall thickness, it can be installed on the equipment for filling, enabling filling with a wide range of flow rates.

[0045] The working principle of the peristaltic pump in this embodiment is as follows:

[0046] During each filling, the rotating shaft 10 rotates, causing the left guide block 15 and the right guide block 23 to rotate. The third deep groove ball bearing 18, mounted on the left and right guide blocks 15 and 23, reaches the thick-walled area of ​​the cam 8 at approximately 280° of its circumference during rotation, making contact with the cam 8. When the third deep groove ball bearing 18 reaches the thin-walled area of ​​the cam 8 at approximately 80° of its circumference, it disengages from the cam 8 under the action of the tension spring 22. When the third deep groove ball bearing 18 presses against the cam 8, the left guide block 15 and the right guide block 23 rotate around the screw 9 as their axis of rotation, driving the double rollers to rotate and press the elastic hose 7 from both sides. When the third deep groove ball bearing 18 disengages from the cam 8, the left guide block 15 and the right guide block 23 rotate around the screw 9 under the tension of the tension spring 22, causing the double rollers to disengage from the elastic hose 7 from both sides. Continuous filling of fluids is achieved through the rotating extrusion of two sets of double rollers.

[0047] In this embodiment, symmetrical rollers 11 that can roll flexibly are arranged on both sides of the elastic hose 7. The two rollers rotate continuously in the radial direction, and the thickness of the cam 8 in the circumferential direction is used to squeeze or disengage the elastic hose 7. There is no relative movement between the rollers 11 and the elastic hose 7, which can greatly reduce the wear of the inner wall of the elastic hose 7. As long as the wall thickness of the clamped elastic hose 7 is consistent, regardless of the inner diameter of the elastic hose 7, it can be directly installed on the equipment to carry out fluid filling, thus achieving the purpose of peristaltic pump fluid filling without being limited by the flow range.

[0048] Example 2

[0049] like Figure 6 and Figure 7 As shown, the dual-roller radial continuous rotary peristaltic pump of the present invention has a similar structural configuration and working principle to the dual-roller radial continuous rotary peristaltic pump in Embodiment 1. The main difference is that:

[0050] Two cams 8 are respectively positioned on the outer sides of the two rollers 11. The elastic hose 7 is radially wrapped around and fixed on the annular support wheel 29. The support wheel 29 is connected and fixed to the support plate 25. The rollers 11 are symmetrically arranged on opposite sides of the elastic hose 7. At this time, the cams 8 and the elastic hose 7 are respectively arranged on the two sides of the rollers 11.

[0051] Furthermore, when the cam 8 is positioned on the outer side of the roller 11, the ends of the two left guide blocks 15 and the ends of the two right guide blocks 23 are connected by compression springs 28, with the compression springs 28 positioned close to the third deep groove ball bearing 18. During material filling, when the roller 11 rotates to the thick-walled area of ​​the cam 8, the compression springs 28 are in a compressed state, and the roller 11 rotates while squeezing the elastic hose 7; when the roller 11 rotates to the thin-walled area of ​​the cam 8, the compression springs 28 are in their original position, and the roller 11 rotates while releasing the elastic hose 7.

[0052] Example 3

[0053] like Figure 8 and Figure 9 As shown, the dual-roller radial continuous rotary peristaltic pump of the present invention has a similar structural configuration and working principle to the dual-roller radial continuous rotary peristaltic pump in Embodiment 1. The main difference is that:

[0054] Two flexible hoses 7 are arranged side by side, and the two ends of the two flexible hoses 7 are connected by a tee connector (not shown in the figure) to achieve merging and splitting of the flow. Multiple sets of compression mechanisms are alternately arranged on the rotating mechanism. The rotating mechanism drives the rotating mechanism to rotate, and the rotating mechanism drives the compression mechanisms to rotate. The multiple sets of compression mechanisms alternately and staggeredly squeeze the two flexible hoses 7 to achieve low-pulsation fluid filling.

[0055] Furthermore, such as Figure 8 As shown, two cams 8 are arranged side-by-side on the rotating shaft 10, with an elastic hose 7 surrounding each cam 8. Correspondingly, multiple sets of rollers 11 are arranged side-by-side on the rotating shaft 10, and the roller sets on the outer sides of the two elastic hoses 7 are installed alternately. During the operation of the peristaltic pump, when the rollers 11 on both sides of one elastic hose 7 squeeze the elastic hose 7 and rotate it a certain distance, the rollers 11 on both sides of the other elastic hose 7 begin to squeeze the elastic hose 7, so as to achieve alternating and staggered squeezing of the two elastic hoses 7.

[0056] While the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the 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 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 present invention, shall still fall within the scope of protection of the present invention.

Claims

1. A dual-roller radial continuous rotary peristaltic pump, characterized in that, The system includes a mounting platform (12), on which a drive mechanism, a rotation mechanism, a hose mechanism, and a pressing mechanism are provided. The hose mechanism includes an elastic hose (7), a cam (8), and a support plate (25). The cam (8) includes a thick-walled region and a thin-walled region. One end of the support plate (25) is connected to a bearing seat (1), which is connected to the mounting platform (12). The other end of the support plate (25) is connected to the cam (8). The pressing mechanism includes a roller (11) and a guide assembly. The guide assembly is connected to the rotation mechanism, and the roller (11) is connected to the guide assembly. The elastic hose (7) is radially fixed around the outer periphery of the cam (8), and the roller (11) is symmetrically arranged on opposite sides of the elastic hose (7). Alternatively, the cam (8) is arranged on the side of the roller (11), the elastic hose (7) is fixed around the support wheel (29) radially, the support wheel (29) is connected and fixed to the support plate (25), and the roller (11) is symmetrically arranged on opposite sides of the elastic hose (7); the rotating mechanism is installed on the bearing seat (1) and connected to the output end of the drive mechanism. The drive mechanism drives the rotating mechanism to rotate, and the rotating mechanism drives the guide assembly to rotate. The roller (11) installed on the guide assembly rotates radially. When the roller (11) rotates to the thick-walled area of ​​the cam (8), the roller (11) squeezes the elastic hose (7). When the roller (11) rotates to the thin-walled area of ​​the cam (8), the roller (11) releases the elastic hose (7).

2. The dual-roller radial continuous rotary peristaltic pump according to claim 1, characterized in that, The drive mechanism includes a drive component (13) and an external PLC controller; the drive component (13) is mounted on the mounting plate (12), and the output end of the drive component (13) is connected to the rotating mechanism; the drive component (13) and the PLC controller are electrically connected, and the PLC controller controls the operation of the drive component (13).

3. The dual-roller radial continuous rotary peristaltic pump according to claim 2, characterized in that, The rotating mechanism includes a rotating shaft (10), the output shaft of the drive assembly (13) passes through the mounting plate (12) and the bearing seat (1) and is connected to one end of the rotating shaft (10), the other end of the rotating shaft (10) is connected to the guide assembly, the bearing seat (1) is nested on the outer periphery of the rotating shaft (10), and the bearing seat (1) is located between the mounting plate (12) and the guide assembly.

4. The dual-roller radial continuous rotary peristaltic pump according to claim 3, characterized in that, One end of the bearing housing (1) is fixedly connected to the mounting plate (12), and the other end of the bearing housing (1) is detachably connected to the end cover (6). The bearing housing (1) and the rotating shaft (10) are nested in sequence with a first deep groove ball bearing (3) and a second deep groove ball bearing (5). The first deep groove ball bearing (3) is close to the output shaft of the drive assembly (13), and the first deep groove ball bearing (3) and the second deep groove ball bearing (5) are provided with bushings (4). A shaft elastic retaining ring (2) is provided between the end of the first deep groove ball bearing (3) and the end of the rotating shaft (10).

5. The dual-roller radial continuous rotary peristaltic pump according to claim 4, characterized in that, The guide assembly includes a left guide block (15) and a right guide block (23) with the same structure. The left guide block (15) and the right guide block (23) are symmetrically arranged on both sides of the rotating shaft (10). The left guide block (15) and the right guide block (23) are arranged in pairs on the rotating shaft (10). The left guide block (15) and the right guide block (23) are each provided with a roller (11). The roller (11) is located on opposite sides of the elastic hose (7) to realize the double roller compression of the elastic hose (7).

6. The dual-roller radial continuous rotary peristaltic pump according to claim 5, characterized in that, The left guide block (15) and the right guide block (23) are detachably connected to the rotating shaft (10) by screws (9), and pads (27) are provided between the left guide block (15) and the rotating shaft (10) and between the right guide block (23) and the rotating shaft (10); the roller (11) is connected to the left guide block (15) by roller shaft (14), and the roller shaft (14) is locked and fixed to the left guide block (15) by nut (16).

7. The dual-roller radial continuous rotary peristaltic pump according to claim 5, characterized in that, The left guide block (15) is provided with a third deep groove ball bearing (18) and a pin (19). The third deep groove ball bearing (18) is connected to the left guide block (15) through the pin (19). The third deep groove ball bearing (18) and the roller (11) are located on both sides of the left guide block (15), and the third deep groove ball bearing (18) is located in front of the roller (11). The third deep groove ball bearing (18) rotates along the edge of the cam (8). The right guide block (23) is provided with a third deep groove ball bearing (18) and a pin (19). The three deep groove ball bearings (18) are connected to the right guide block (23) via pins (19). The third deep groove ball bearing (18) and the roller (11) are located on both sides of the right guide block (23), and the third deep groove ball bearing (18) is located in front of the roller (11). The third deep groove ball bearing (18) rotates along the edge of the cam (8). The ends of the two left guide blocks (15) and the ends of the two right guide blocks (23) are connected by tension springs (22), and the tension springs (22) are close to the third deep groove ball bearing (18). Alternatively, the ends of the two left guide blocks (15) and the ends of the two right guide blocks (23) are connected by compression springs (28), and the compression springs (28) are close to the third deep groove ball bearing (18).

8. The dual-roller radial continuous rotary peristaltic pump according to any one of claims 1 to 7, characterized in that, The hose mechanism also includes a first limiting block (24) and a second limiting block (26), which are symmetrically arranged on both sides of the support plate (25) to assist in clamping and positioning the input and output ends of the elastic hose (7).

9. The dual-roller radial continuous rotary peristaltic pump according to any one of claims 2 to 7, characterized in that, The cam (8) has a circular ring structure, and the circumferential angle β of the thin-walled area of ​​the cam (8) is 80°±40°; the drive component (13) adopts a stepper motor or a servo motor.

10. The dual-roller radial continuous rotary peristaltic pump according to any one of claims 1 to 7, characterized in that, The elastic hose (7) consists of two hoses, and the two ends of the two elastic hoses (7) are connected by a three-way connector. The rotating mechanism is alternately equipped with multiple sets of compression mechanisms. The rotating mechanism is driven to rotate by the driving mechanism, and the rotating mechanism drives the compression mechanism to rotate. The multiple sets of compression mechanisms alternately and misalign to squeeze the two elastic hoses (7) to achieve low-pulsation fluid filling.

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