A power transmission low-pulsation peristaltic pump

Abstract

This invention discloses a low-pulsation peristaltic pump with power transmission. It utilizes a three-way connector to achieve confluence or diversion of fluid through flexible tubing. A rotating mechanism is horizontally arranged on both sides of the flexible tubing and connected to a drive mechanism. Multiple sets of roller-pressing tubing assemblies are alternately and evenly distributed on the rotating mechanism. The drive mechanism drives the rotating mechanism, causing the roller-pressing tubing assemblies to rotate. When the rollers on both sides of the first flexible tubing compress the tubing a distance L, the rollers on both sides of the second flexible tubing begin to compress the tubing. When the compression distance of the second flexible tubing reaches L, the rollers on both sides of the first flexible tubing release the tubing, and a new round of compression begins. This cycle repeats, alternating the compression of the two sets of flexible tubing. This invention solves the problem of fluid contamination caused by severe wear of the tubing's inner wall and the generation of a large number of particles in existing peristaltic pumps, and effectively reduces pulsation during liquid transmission.

Description

Technical Field

[0001] This invention belongs to the field of fluid filling pump technology, specifically relating to a power transmission low-pulsation peristaltic pump. Background Technology

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

[0003] Existing peristaltic pumps rely on a roller-driven tubing assembly with a rotating device to rotate and press the tubing to discharge fluid. The amount of fluid extruded is controlled by the number of rotations or the angle of the roller-driven tubing assembly. For each filling cycle, the initial and final positions of the roller-driven tubing assembly will not be the same due to the cumulative effect of the number of rotations or the angle. In addition, the elastic recovery of the tubing varies at different positions, making it difficult for traditional peristaltic pumps to achieve the expected filling accuracy.

[0004] Existing peristaltic pumps have a limited range of filling volumes per cycle. 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, as well as low refill accuracy and narrow filling range. The present invention provides a power transmission low-pulsation 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 present invention adopts the following technical solution:

[0007] A power-driven low-pulsation peristaltic pump includes a mounting bracket, on which a drive mechanism, a rotating mechanism, roller pressing tube assemblies, and hose assemblies are mounted. The hose assembly includes a tee connector and a flexible hose. The flexible hose includes a first flexible hose and a second flexible hose arranged side-by-side. The tee connector is located at both ends outside the pump body, used to merge or separate the first and second flexible hoses inside the pump body. The rotating mechanism is connected to the output end of the drive mechanism. The rotating mechanism includes an arc segment and a straight segment. The straight segment of the rotating mechanism is arranged horizontally on opposite sides of the flexible hose. Multiple sets of roller pressing tube assemblies are alternately and evenly distributed on the rotating mechanism. Driven by the drive mechanism, the rotating mechanisms located on both sides of the flexible hose rotate synchronously in a circular motion, thereby driving the roller pressing tube assemblies to rotate synchronously. When the rollers on both sides of the first flexible hose... When the compression assembly rotates to the straight section of the rotating mechanism, it moves in a straight line while compressing the first elastic hose a distance L. At the same time, the roller compression assemblies on both sides of the second elastic hose rotate to the straight section of the rotating mechanism and begin to compress the second elastic hose. When the compression distance of the roller compression assembly on the second elastic hose reaches L, the roller compression assemblies on both sides of the first elastic hose rotate to the arc section of the rotating mechanism, and the roller compression assembly releases the first elastic hose. The first elastic hose then begins a new round of compression. When the distance of the first elastic hose reaches L, the second elastic hose begins a new round of compression. When the compression distance of the second elastic hose reaches L, the first elastic hose begins another round of compression. This cycle repeats, alternating between the compression of the first and second elastic hoses. The value of L is the distance between the roller compression assemblies on the rotating mechanism.

[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 bracket, 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 mounting bracket mounted on a mounting support, and a driven gear, a first driven shaft, a drive shaft, a drive gear, a second driven shaft, a third driven shaft, and a transmission belt assembly mounted on the mounting bracket. The output end of the drive assembly is connected to the drive shaft. A drive gear is mounted on the drive shaft, and a driven gear is mounted on the first driven shaft. The drive gear meshes with the driven gear to achieve a rotatable connection between the drive shaft and the first driven shaft. The transmission belt assembly is located on the upper and lower sides of the elastic hose, and multiple roller pressing tube assemblies are evenly distributed on the transmission belt assembly. The drive shaft and the second driven shaft are respectively connected to the two ends of the transmission belt assembly on the lower side of the elastic hose, and the first driven shaft and the third driven shaft are respectively connected to the two ends of the transmission belt assembly on the upper side of the elastic hose. Under the drive of the drive assembly, the drive shaft rotates, driving the first driven shaft, the second driven shaft, and the third driven shaft to rotate, thereby rotating the transmission belt assemblies on the upper and lower sides of the elastic hose, which in turn drives the roller pressing tube assemblies to squeeze or release the elastic hose.

[0010] As a further improvement of the present invention, the transmission belt assembly includes a first transmission belt, a transmission wheel, a second transmission belt, and a third transmission belt. The two ends of the first, second, and third transmission belts are respectively connected by the transmission wheel. On the same side of the elastic hose, the first, second, and third transmission belts are on the same horizontal plane. Roller pressing tube assemblies are correspondingly connected between the first and third transmission belts and between the second and third transmission belts. The roller pressing tube assemblies rotate synchronously with the first, second, and third transmission belts. The roller pressing tube assemblies between the first and third transmission belts are located on opposite sides of the first elastic hose, and the roller pressing tube assemblies between the second and third transmission belts are located on opposite sides of the second elastic hose. The roller pressing tube assemblies on both sides of the first and second elastic hoses are alternately arranged to alternately and staggeredly compress the two sets of elastic hoses.

[0011] As a further improvement of the present invention, the drive component adopts a stepper motor, a servo motor, or a motor drive unit; the transmission belt component adopts a synchronous belt drive component or a chain drive component.

[0012] As a further improvement of the present invention, the roller pressing tube assembly includes a V-type bearing, a cotter pin, a roller shaft, a roller, a second deep groove ball bearing, and a second shaft elastic retaining ring; the roller is nested on the outer periphery of the roller shaft through the second deep groove ball bearing, the two sides of the roller shaft are respectively fixed to the transmission belt by screws, and the two ends of the roller shaft are respectively nested in the V-type bearing and fixed with cotter pins.

[0013] As a further improvement of the present invention, one end of the drive shaft and one end of the first driven shaft both penetrate the mounting plate and the first bearing mounting seat, one end of the second driven shaft and one end of the third driven shaft both penetrate the mounting plate and the second bearing mounting seat, and a first deep groove ball bearing and a retaining ring for the bore are provided at the connection points of the drive shaft and the first driven shaft with the first bearing mounting seat, and at the connection points of the second driven shaft and the third driven shaft with the second bearing mounting seat;

[0014] The mounting plate is symmetrically provided with U-shaped blocks on both sides, and a three-way pipe joint is fixed to the side of the block; the block is arranged along the extension direction of the drive shaft, and a parallel connecting plate is provided at the end of the block. The other end of the drive shaft, the other end of the first driven shaft, the other end of the second driven shaft, and the other end of the third driven shaft all pass through the connecting plate, and a first shaft elastic retaining ring and a third deep groove ball bearing are provided at the connection between the drive shaft, the first driven shaft, the second driven shaft, and the third driven shaft and the connecting plate.

[0015] As a further improvement of the present invention, a guide plate is provided on the inner side of the stop block. One end of the guide plate is connected to the mounting plate, and the other end of the guide plate is connected to the connecting plate. Guide plates are provided on both the upper and lower sides of the elastic hose. Multiple guide rails are provided parallel to the setting direction of the elastic hose on the guide plate, and the guide rails face the elastic hose. The guide rails are matched with the V-type bearing to achieve guidance. When the roller squeezes the elastic hose, the guide rails on the guide plate abut against the V-type bearing, so that the distance h between the upper and lower layers of the elastic hose wall is maintained at 2×(70%~90%)t, where t is the wall thickness of the elastic hose in mm.

[0016] As a further improvement of the present invention, the rollers are installed at three equal divisions on the transmission belt, and three sets of rollers are provided between the first and third transmission belts, and three sets of rollers are provided between the second and third transmission belts. The distance between the six sets of rollers is 1 / 6 of the total length of the transmission belt.

[0017] As a further improvement of the present invention, the value of L is 1 / 6 of the total length of the transmission belt.

[0018] Compared with the prior art, the advantages of the present invention are as follows:

[0019] The present invention relates to a low-pulsation peristaltic pump with power transmission. By setting three-way pipe joints at both ends of the pump body, it achieves the merging or splitting of two sets of elastic hoses within the pump body. A rotating mechanism is connected to the output end of a drive mechanism, and the straight section of the rotating mechanism is arranged horizontally on opposite sides of the elastic hoses. Multiple sets of roller pressing hose assemblies are evenly distributed on the rotating mechanism. The drive mechanism drives the rotating mechanisms on both sides of the elastic hoses to rotate synchronously in a ring, thus achieving synchronous rotation of the roller pressing hose assemblies. When the roller pressing hose assemblies on both sides of the first elastic hose rotate to the straight section of the rotating mechanism, and move linearly while squeezing the first elastic hose a distance L, the roller pressing hose assemblies on both sides of the second elastic hose rotate to the straight section of the rotating mechanism and begin squeezing the second elastic hose. When the squeezing distance of the roller pressing hose assemblies on the second elastic hose reaches L, the roller pressing hose assemblies on both sides of the first elastic hose rotate to the straight section of the rotating mechanism. During the arc segment of the rotating mechanism, the roller pressing assembly releases the first elastic hose; simultaneously, the first elastic hose begins a new round of compression. When the distance of the first elastic hose reaches L, the second elastic hose begins a new round of compression, and when the compression distance of the second elastic hose reaches L, the first elastic hose begins another round of compression. This cyclical, staggered compression of the first and second elastic hoses allows the elastic hoses to periodically recover their elasticity. Because the double rollers rotate synchronously to compress the elastic hoses, the shearing of the liquid molecules and wear on the hoses are minimized, avoiding the risk of fluid contamination due to severe wear on the inner wall of the hose and the generation of a large number of particles. This effectively extends the service life of the pump tubing. Since the initial position of the roller pressing assembly is the same for each fluid filling, the accuracy of repeated filling is greatly improved, achieving the goal of peristaltic pump dual-pipe delivery without flow range limitations. Furthermore, the use of a dual-pipe pulse cancellation design with phase difference (a time difference between the compression of the two pipes by the rollers) effectively reduces pulsation and improves filling accuracy. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the main structural principle of a low-pulsation peristaltic pump with power transmission in a specific embodiment of the present invention.

[0021] Figure 2 This is a top view schematic diagram of the low-pulsation peristaltic pump with power transmission in a specific embodiment of the present invention.

[0022] Figure 3 This is a schematic diagram of the left-side structure of a low-pulsation peristaltic pump with power transmission in a specific embodiment of the present invention.

[0023] Figure 4 As shown in the specific embodiments of the present invention Figure 1 A schematic diagram of the structural principle of the cross-section along the BB direction.

[0024] Figure 5As shown in the specific embodiments of the present invention Figure 1 A schematic diagram of the structural principle of the cross-section along the AA direction.

[0025] Figure 6 This is a schematic diagram of the three-dimensional isometric projection structure of a low-pulsation peristaltic pump with power transmission in a specific embodiment of the present invention.

[0026] Figure 7 This is a schematic diagram of the three-dimensional axonometric projection structure of the low-pulsation peristaltic pump with power transmission after removing the left side block and the upper and lower connecting plates in a specific embodiment of the present invention.

[0027] Figure 8 This is a schematic diagram of the three-dimensional axonometric projection structure of the mounting bracket in a specific embodiment of the present invention.

[0028] Figure 9 This is a schematic diagram of the three-dimensional axonometric projection structure of the guide plate in a specific embodiment of the present invention.

[0029] Legend: 1. Mounting base plate; 2. Drive assembly; 3. Mounting seat; 4. Drive shaft; 5. Driven gear; 6. Right support plate; 7. Small round nut; 8. Mounting plate; 9. First bearing mounting seat; 10. First transmission belt; 11. Flexible hose; 111. First flexible hose; 112. Second flexible hose; 12. T-joint; 13. Connecting plate; 14. First shaft retaining ring; 15. First driven shaft; 16. V-bearing; 17. Cotter pin; 18. Roller shaft; 19. Roller; 20. Second driven shaft; 21. Transmission wheel; 22. Left support plate 23. Third driven shaft; 25. Second bearing mounting seat; 26. Stop block; 27. Second transmission belt; 28. Support leg; 29. ​​Nut; 30. First spring washer; 31. Flat washer; 32. First deep groove ball bearing; 33. First O-ring seal; 34. Second O-ring seal; 35. Second deep groove ball bearing; 36. Third deep groove ball bearing; 37. Second shaft retaining ring; 38. Bushing; 39. Guide plate; 391. Guide rail; 40. Main gear; 41. Hole retaining ring; 42. Screw; 43. Second spring washer; 44. Third transmission belt. Detailed Implementation

[0030] 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.

[0031] 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.

[0032] 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.

[0033] Example

[0034] like Figures 1 to 9 As shown, the power transmission low-pulsation peristaltic pump of the present invention includes a mounting bracket, such as... Figure 8As shown, the mounting bracket includes a mounting base plate 1, a mounting seat 3, a mounting plate 8, a right support plate 6, a left support plate 22, and four support feet 28. The mounting seat 3 and the mounting plate 8 are vertically mounted on the mounting base plate 1. The mounting plate 8 has multiple mounting holes, and the right support plate 6 and the left support plate 22 are vertically mounted on both sides of the mounting plate 8, respectively. The support feet 28 are mounted on the four vertices of the mounting base plate 1 via nuts 29, first spring washers 30, and flat washers 31. The mounting bracket is equipped with a drive mechanism, a rotation mechanism, a roller pressing tube assembly, and a hose assembly. The hose assembly includes a three-way pipe connector 12 and an elastic hose 11. The elastic hose 11 includes a first elastic hose 111 and a second elastic hose 112 arranged side by side. The three-way pipe connector 12 is located at both ends outside the pump body and is used to realize the merging or splitting of the two sets of elastic hoses 11 inside the pump body. The rotating mechanism is connected to the output end of the drive mechanism. The rotating mechanism includes an arc segment and a straight segment. The straight segment of the rotating mechanism is arranged horizontally on both sides of the elastic hose 11. Multiple sets of roller pressing assemblies are alternately and evenly distributed on the rotating mechanism. Driven by the drive mechanism, the rotating mechanisms located on both sides of the elastic hose 11 rotate synchronously in a ring, thereby driving the roller pressing assemblies to rotate synchronously. When the roller pressing assemblies on both sides of the first elastic hose 111 rotate to the straight section of the rotating mechanism, and move in a straight line while squeezing the first elastic hose 111 a distance L, the roller pressing assemblies on both sides of the second elastic hose 112 rotate to the straight section of the rotating mechanism and begin squeezing the second elastic hose 112. When the squeezing distance of the roller pressing assemblies on the second elastic hose 112 reaches L, the roller pressing assemblies on both sides of the first elastic hose 111 rotate to the arc section of the rotating mechanism, and the roller pressing assemblies release the first elastic hose 111; and the first elastic hose 111 begins a new round of squeezing. When the distance of the first elastic hose 111 reaches L, the second elastic hose 112 begins a new round of squeezing. When the squeezing distance of the second elastic hose 112 reaches L, the first elastic hose 111 begins another round of squeezing. This cycle repeats, alternatingly squeezing the first elastic hose 111 and the second elastic hose 112. The value of L is the distance between the roller pressing assemblies on the rotating mechanism, so as to achieve the alternating squeezing of the elastic hose 11 by the roller assemblies at equal distances.

[0035] In this embodiment, by setting three-way pipe joints 12 at both ends of the pump body, the two sets of elastic hoses 11 inside the pump body are combined or separated. The rotating mechanism is connected to the output end of the motor drive mechanism, and the straight section of the rotating mechanism is arranged horizontally on both sides of the elastic hoses 11. Multiple sets of roller pressing hose assemblies are evenly distributed on the rotating mechanism. The drive mechanism drives the rotating mechanisms on both sides of the elastic hoses to rotate synchronously in a ring, thus realizing the synchronous rotation of the roller pressing hose assemblies. When the roller pressing hose assemblies on both sides of the first elastic hose 111 rotate to the straight section of the rotating mechanism and the distance of squeezing the first elastic hose 111 reaches L, the roller pressing hose assemblies on both sides of the second elastic hose 112 rotate to the straight section of the rotating mechanism and begin to squeeze the second elastic hose 112. When the squeezing distance of the roller pressing hose assemblies on the second elastic hose 112 reaches L, when the roller pressing hose assemblies on both sides of the first elastic hose 111 rotate to the arc section of the rotating mechanism, the roller pressing hose assemblies release the first elastic hose. Hose 111; Simultaneously, the other end of the first elastic hose 111 begins a new round of compression. When the compression distance of the first elastic hose 111 reaches L, the second elastic hose 112 ends the first round of compression and begins a new round of compression. When the compression distance of the second elastic hose 112 reaches L, the first elastic hose 111 ends the second round of compression and begins another round of compression. This cycle repeats, alternately compressing the first elastic hose 111 and the second elastic hose 112. The elastic hose 11 can also periodically recover its elasticity. Because the elastic hose is compressed by the synchronous rotation of the dual 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 compression assembly is the same for each fluid filling, the accuracy of repeated filling can be greatly improved. This achieves the purpose of the peristaltic pump's dual-tube delivery without being limited by the flow range. At the same time, the dual-pipe pulse cancellation design with phase difference (a time difference between the two pipes being squeezed by the rollers) effectively reduces pulsation and improves filling accuracy.

[0036] like Figure 2 As shown, in this embodiment, the drive mechanism includes a drive component 2 and an external PLC controller (not shown in the figure). The drive component 2 is mounted on the mounting base 3, and its output is connected to the rotating mechanism. The drive component 2 and the PLC controller are electrically connected, and the PLC controller controls the operation of the drive component 2. For example, it controls the start / stop, forward / reverse rotation, full speed, speed adjustment, and flow calibration of the drive component 2 to improve the control accuracy of filling. Furthermore, the drive component 2 can specifically be a stepper motor or a servo motor, or a similar type of motor or drive unit, as long as it can drive the rotating mechanism to rotate smoothly, enabling the roller pressing assembly to smoothly squeeze the elastic hose.

[0037] like Figure 1 , Figure 3 and Figure 7 As shown, the rotating mechanism includes a mounting plate 8 mounted on a mounting bracket, and a driven gear 5, a first driven shaft 15, a drive shaft 4, a main gear 40, a second driven shaft 20, a third driven shaft 23, and a transmission belt assembly mounted on the mounting plate 8. The output end of the drive assembly 2 is connected to the drive shaft 4. The main gear 40 is mounted on the drive shaft 4, and the driven gear 5 is mounted on the first driven shaft 15. The drive shaft 4 and the driven gear 5 mesh to achieve a rotatable connection between the drive shaft 4 and the first driven shaft 15. The transmission belt assembly is located on the upper and lower sides of the elastic hose 11, and multiple roller pressing tube assemblies are evenly distributed on the transmission belt assembly. The drive shaft 4 and the second driven shaft 20 are connected to the two ends of the transmission belt assembly on the lower side of the elastic hose 11, and the first driven shaft 15 and the third driven shaft 23 are connected to the two ends of the transmission belt assembly on the upper side of the elastic hose 11. Driven by the drive assembly 2, the drive shaft 4 rotates. The drive shaft 4 and the first driven shaft 15 are connected by the meshing of the main gear 40 and the driven gear 5. The drive shaft 4 and the second driven shaft 20 are connected by the transmission belt assembly. The first driven shaft 15 and the third driven shaft 23 are connected by the transmission belt assembly. Thus, the drive shaft 4, the first driven shaft 15, the second driven shaft 20 and the third driven shaft 23 rotate synchronously, and the transmission belt assemblies on the upper and lower sides of the elastic hose 11 rotate, thereby driving the roller pressing assembly to squeeze or release the elastic hose 11.

[0038] like Figure 2 and Figure 3As shown, the transmission belt assembly includes a first transmission belt 10, a transmission pulley 21, a second transmission belt 27, and a third transmission belt 44. The two ends of the first transmission belt 10 are connected to the transmission pulley 21, the two ends of the second transmission belt 27 are also connected to the transmission pulley 21, and the two ends of the third transmission belt 44 are also connected to the transmission pulley 21. For example, the drive shaft 4 is equipped with three transmission pulleys 21 simultaneously. One transmission pulley 21 is used to connect to one end of the first transmission belt 10, another transmission pulley 21 is used to connect to one end of the second transmission belt 27, and the third transmission belt 44. The second driven shaft 20 is also equipped with three transmission pulleys 21 simultaneously. Adjacent transmission pulleys 21 are separated by bushings 38. One transmission pulley 21 is used to connect to the other end of the first transmission belt 10, another transmission pulley 21 is used to connect to the other end of the second transmission belt 27, and the third transmission belt 44. This achieves the transmission belts being connected to each other via transmission pulleys 21. Meanwhile, on the same side of the elastic hose 11, the first transmission belt 10, the second transmission belt 27, and the third transmission belt 44 are on the same horizontal plane; the roller pressing tube assembly between the first transmission belt 10 and the third transmission belt 44 is located on opposite sides of the first elastic hose 111, and the roller pressing tube assembly between the second transmission belt 27 and the third transmission belt 44 is located on opposite sides of the second elastic hose 112. The roller pressing tube assemblies on both sides of the first elastic hose 111 and the roller pressing tube assemblies on both sides of the second elastic hose 112 are arranged alternately to alternately and staggeredly compress the two sets of elastic hoses 11.

[0039] like Figure 3 As shown, the roller pressing tube assembly includes a V-bearing 16, a cotter pin 17, a roller shaft 18, a roller 19, a second deep groove ball bearing 35, and a second shaft retaining ring 37. The roller 19 is nested around the outer circumference of the roller shaft 18 via the second deep groove ball bearing 35. Both sides of the roller shaft 18 are fixed to the transmission belt by screws 42 and a second spring washer 43, respectively. Both ends of the roller shaft 18 are nested within the V-bearing 16 and secured with cotter pins 17. The roller pressing tube assembly is mounted on the third transmission belt 44 and the second transmission belt 27 in the same manner.

[0040] Furthermore, the rollers 19 are installed at three equal divisions on the transmission belts, that is, three sets of rollers 19 are evenly distributed on the first transmission belt 10 and the third transmission belt 44, and three sets of rollers 19 are also evenly distributed on the third transmission belt 44 and the second transmission belt 27, as shown. Figure 1 and Figure 2As shown, the distance L between the six sets of rollers 19 is 1 / 6 of the total length of the transmission belt. The rollers 19 on both sides of the first elastic hose 111 and the second elastic hose 112 squeeze the hose in a front-to-back sequence, and the distance L between the two sets of rollers 19 is exactly 1 / 6 of the total length of the transmission belt, achieving equal-distance alternating staggered squeezing of the elastic hose 11. When squeezing the elastic hose 11, the distance h between the upper and lower layers of the elastic hose 11 wall is 2×(70%~90%)t, where t is the wall thickness of the elastic hose 11 in mm. As long as the elastic hose 11 has the same wall thickness, it can be installed on the equipment for filling, realizing a wide range of flow rate filling. During the squeezing filling process, the double roller sets on the upper and lower sides of the elastic hose 11 rotate automatically and move in a straight line to squeeze the elastic hose 11, minimizing the shearing of the liquid molecules and the wear on the elastic hose 11. Due to the adoption of the dual-pipeline pulse cancellation filling method, the pulsation during fluid filling is effectively reduced.

[0041] Since the rollers 19 are installed at three equally divided annular circumference positions on the transmission belt, the straight-line distance between the three rollers 19 is consistent. Therefore, during each filling process, the initial position and distance of the rollers 19 linearly squeezing and disengaging from the elastic hose 11 are the same, achieving high-precision repeatable filling. For elastic hoses 11 of different specifications, as long as they have the same wall thickness, the equipment can be installed for filling, enabling a wide range of flow rates. Furthermore, the transmission belt assembly can adopt synchronous belt drive, chain drive, or other similar transmission methods, as long as it can drive the rollers 19 to smoothly squeeze the elastic hose 11, achieving low-pulsation metering and filling of the material.

[0042] like Figure 4 and Figure 5 As shown, the first bearing mounting seat 9 and the second bearing mounting seat 25 are both mounted through the mounting plate 8 and fixed by small round nuts 7. A first O-ring seal 33 is provided at the connection between the first bearing mounting seat 9 and the second bearing mounting seat 25 and the mounting plate 8. One end of the drive shaft 4 and one end of the first driven shaft 15 pass through the mounting plate 8 and the first bearing mounting seat 9. One end of the second driven shaft 20 and one end of the third driven shaft 23 pass through the mounting plate 8 and the second bearing mounting seat 25. A first deep groove ball bearing 32, a bore elastic retaining ring 41, and a second O-ring seal 34 are provided at the connection between the drive shaft 4 and the first driven shaft 15 and the first bearing mounting seat 9, and at the connection between the second driven shaft 20 and the third driven shaft 23 and the second bearing mounting seat 25.

[0043] like Figure 3 , Figure 6 and Figure 8As shown, U-shaped blocks 26 are symmetrically arranged on the left and right sides of the mounting plate 8, and the tee connector 12 is fixed to the side of the block 26. The block 26 serves to install and fix the tee connector 12. At the same time, the inner side of the block 26 contacts the roller 19 in the arc section of the transmission belt, causing the roller 19 to rotate before entering the straight section of the transmission belt. After the roller 19 enters the straight section of the transmission belt, it can move along the straight direction while rotating and squeezing the elastic hose 11. Both blocks 26 are arranged along the extension direction of the drive shaft 4. Two connecting plates 13 are provided vertically at the ends of the blocks 26. The other end of the drive shaft 4 and the other end of the second driven shaft 20 pass through the upper connecting plate 13, and the other end of the first driven shaft 15 and the other end of the third driven shaft 23 pass through the lower connecting plate 13. Furthermore, the connection points between the drive shaft 4, the first driven shaft 15, the second driven shaft 20, and the third driven shaft 23 and the connecting plate 13 are equipped with a first shaft elastic retaining ring 14 and a third deep groove ball bearing 36, which ensures that each drive shaft is securely installed without affecting the smooth operation of the drive shaft.

[0044] like Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, a guide plate 39 is provided on the inner side of the stop block 26. One end of the guide plate 39 is connected to the mounting plate 8, and the other end of the guide plate 39 is connected to the connecting plate 13. Guide plates 39 are also provided on both the upper and lower sides of the elastic hose 11. Figure 9 As shown, multiple guide rails 391 are arranged parallel to the direction of the flexible hose 11 on the guide plate 39. That is, the guide rails 391 are arranged along the straight section of the transmission belt and face the flexible hose 11. The guide rails 391 are matched with the V-bearings 16 to provide auxiliary guidance and improve the accuracy of the roller 19's displacement. When the roller 19 squeezes the flexible hose 11, the flexible hose 11 generates a squeezing reaction force that pushes the roller 19 outward. While the V-bearings 16 roll along the guide rails 391, the guide rails 391 can also hold the V-bearings 16 in place, ensuring that the distance h between the upper and lower layers of the flexible hose 11 wall remains 2 × (70%–90%)t, where t is the wall thickness of the flexible hose 11 (mm). In other words, as long as the flexible hose 11 has the same wall thickness, it can be installed on the equipment for filling, achieving a wide range of flow rates. Furthermore, by connecting the guide plate 39 and the stop block 26 in space through the mounting plate 8 and the connecting plate 13, the displacement of the two components during the filling process can be minimized, which is beneficial to improving the filling accuracy.

[0045] In this embodiment, during each filling, the drive shaft 4, the first driven shaft 15, the second driven shaft 20, and the third driven shaft 23 rotate, driving the transmission wheel 21 to rotate. The rotation of the transmission wheel 21 drives the first transmission belt 10, the third transmission belt 44, and the second transmission belt 27 to perform a circular motion. The upper and lower rollers 19 installed on the first transmission belt 10, the third transmission belt 44, and the second transmission belt 27 are driven to perform a circular motion together. The upper and lower rollers 19 rotate and squeeze the elastic hose 11 while moving forward in a straight line along the straight section of the ring until they reach the arc section of the ring and begin to release the squeeze on the elastic hose 11, completing one dual-pipeline low-pulsation fluid filling. Then, the next synchronous filling is performed at the same initial squeezing position and release position, which greatly improves the repeatability of the peristaltic pump. Moreover, the use of a dual-pipeline pulse cancellation two sets of roller misalignment structure further reduces fluid transmission pulsation.

[0046] like Figure 1 and Figure 6 As shown in the diagram, in this embodiment, the working principle of the low-pulsation linear peristaltic pump is as follows: When the first set of rollers 19 on both sides of the first elastic hose 111 rotates to the straight section of the rotating mechanism, squeezing the first elastic hose 111 a distance L (L is 1 / 6 of the total length of the transmission belt), the first set of rollers 19 on both sides of the second elastic hose 112 also rotates to the straight section of the rotating mechanism, beginning to squeeze the second elastic hose 112. When the first set of rollers 19 on both sides of the second elastic hose 112 squeezes the second elastic hose 112 a distance L, the first set of rollers 19 on both sides of the first elastic hose 111 rotates to the arc section of the rotating mechanism, beginning to release the squeezing of the first elastic hose 111, and the second set of rollers 19 on both sides of the first elastic hose 111 rotates to the straight section of the rotating mechanism, beginning to squeeze the first elastic hose 111. When the second set of rollers 19 on both sides of the first elastic hose 111 squeezes the first elastic hose 111 a distance L, the second set of rollers 19 on both sides of the second elastic hose 112 also rotates to the straight section of the rotating mechanism, beginning to squeeze the second elastic hose 112. When the second set of rollers 19 on both sides of the second elastic hose 112 compresses the second elastic hose 112 by a distance L, the second set of rollers 19 on both sides of the first elastic hose 111 rotates to the arc segment of the rotating mechanism and begins to release the compression of the first elastic hose 111. The third set of rollers 19 on both sides of the first elastic hose 111 rotates to the straight segment of the rotating mechanism and begins to compress the first elastic hose 111. When the third set of rollers 19 on both sides of the first elastic hose 111 compresses the first elastic hose 111 by a distance L, the third set of rollers 19 on both sides of the second elastic hose 112 also rotates to the straight segment of the rotating mechanism and begins to compress the second elastic hose 112. This cyclical offset compressing of the first elastic hose 111 and the second elastic hose 112, through a time-difference dual-pipe pulse cancellation method, achieves the purpose of reducing pulsation during liquid transmission.

[0047] 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 low-pulsation peristaltic pump for power transmission, characterized in that, The pump body includes a mounting bracket, which is equipped with a drive mechanism, a rotating mechanism, a roller pressing tube assembly, and a hose assembly. The hose assembly includes a tee connector (12) and an elastic hose (11). The elastic hose (11) includes a first elastic hose (111) and a second elastic hose (112) arranged side by side. The tee connector (12) is located at both ends outside the pump body and is used to realize the merging or splitting of the first elastic hose (111) and the second elastic hose (112) inside the pump body. The roller pressing tube assembly includes a V-bearing (16) and a roller (19). The rotating mechanism includes a mounting plate (8) set on the mounting bracket, and a driven gear (5), a first driven shaft (15), and a drive shaft (4) set on the mounting plate (8). The drive mechanism comprises a main gear (40), a second driven shaft (20), a third driven shaft (23), and a transmission belt assembly; the output end of the drive mechanism is connected to the drive shaft (4), and the transmission belt assembly is located on the upper and lower sides of the elastic hose (11), with multiple roller pressing tube assemblies evenly distributed on the transmission belt assembly; the drive shaft (4) and the second driven shaft (20) are respectively connected to the two ends of the transmission belt assembly on the lower side of the elastic hose (11), and the first driven shaft (15) and the third driven shaft (23) are respectively connected to the two ends of the transmission belt assembly on the upper side of the elastic hose (11); the mounting bracket is also provided with a guide plate (39), and the guide plate (39) is provided with a guide rail (391) that matches the V-type bearing (16); the rotating mechanism and the drive The output end of the mechanism is connected. The rotating mechanism includes an arc segment and a straight segment. The straight segment of the rotating mechanism is arranged horizontally on both sides of the elastic hose (11). Under the drive of the driving mechanism, the transmission belt assembly on the upper and lower sides of the elastic hose (11) rotates, thereby driving the roller pressing tube assembly to rotate synchronously in a ring. When the roller (19) squeezes the elastic hose (11) on the straight segment, the guide rail (391) abuts against the V-type bearing (16) to achieve guidance. When the roller pressing tube assembly on both sides of the first elastic hose (111) rotates to the straight segment of the rotating mechanism, and moves in a straight line while squeezing the first elastic hose (111) a distance of L, the roller pressing tube assembly on both sides of the second elastic hose (112) rotates to the rotating segment. The straight section of the mechanism begins to compress the second elastic hose (112); when the compression distance of the roller compression assembly on the second elastic hose (112) reaches L, the roller compression assemblies on both sides of the first elastic hose (111) rotate to the arc section of the rotating mechanism, and the roller compression assembly releases the first elastic hose (111); and the first elastic hose (111) begins a new round of compression. When the compression distance of the first elastic hose (111) reaches L, the second elastic hose (112) begins a new round of compression. When the compression distance of the second elastic hose (112) reaches L, the first elastic hose (111) begins another round of compression; this cycle is repeated, alternately compressing the first elastic hose (111) and the second elastic hose (112).The value of L is the distance between the roller pressure tube assemblies on the rotating mechanism.

2. The low-pulsation peristaltic pump with power transmission according to claim 1, characterized in that, The drive mechanism includes a drive component (2) and an external PLC controller; the drive component (2) is mounted on a mounting base (3), the mounting base (3) is set on a mounting bracket, and the output end of the drive component (2) is connected to the rotating mechanism; the drive component (2) and the PLC controller are electrically connected, and the PLC controller controls the operation of the drive component (2).

3. The low-pulsation peristaltic pump with power transmission according to claim 2, characterized in that, The main gear (40) is installed on the drive shaft (4), and the driven gear (5) is installed on the first driven shaft (15). The drive shaft (4) and the driven gear (5) mesh to achieve a rotatable connection between the drive shaft (4) and the first driven shaft (15). Under the drive of the drive assembly (2), the drive shaft (4) rotates and drives the first driven shaft (15), the second driven shaft (20) and the third driven shaft (23) to rotate.

4. The low-pulsation peristaltic pump with power transmission according to claim 3, characterized in that, The transmission belt assembly includes a first transmission belt (10), a transmission wheel (21), a second transmission belt (27), and a third transmission belt (44). The two ends of the first transmission belt (10), the second transmission belt (27), and the third transmission belt (44) are respectively connected by the transmission wheel (21). On the same side of the elastic hose (11), the first transmission belt (10), the second transmission belt (27), and the third transmission belt (44) are on the same horizontal plane. Roller pressing assemblies are correspondingly connected between the first transmission belt (10) and the second transmission belt (27), and between the second transmission belt (27) and the third transmission belt (44). The rollers between the first and second transmission belts (10, 27, and 44) ​​rotate synchronously. The rollers between the first and second transmission belts (27) are located on opposite sides of the first elastic hose (111), and the rollers between the second and third transmission belts (44) are located on opposite sides of the second elastic hose (112). The rollers between the first and second elastic hoses (111) and the rollers between the second and third elastic hoses (112) are arranged alternately to alternately squeeze the first elastic hose (111) and the second elastic hose (112).

5. The low-pulsation peristaltic pump with power transmission according to claim 4, characterized in that, The drive component (2) adopts a stepper motor or a servo motor; the transmission belt component adopts a synchronous belt transmission component or a chain transmission component.

6. The low-pulsation peristaltic pump with power transmission according to claim 4, characterized in that, The roller pressing tube assembly also includes a cotter pin (17), a roller shaft (18), a second deep groove ball bearing (35), and a second shaft elastic retaining ring (37); the roller (19) is nested on the outer periphery of the roller shaft (18) through the second deep groove ball bearing (35), and the two sides of the roller shaft (18) are respectively fixed to the transmission belt of the transmission belt assembly by screws (42). The two ends of the roller shaft (18) are respectively nested in V-type bearings (16) and are fixed by cotter pins (17).

7. The low-pulsation peristaltic pump with power transmission according to claim 6, characterized in that, One end of the drive shaft (4) and one end of the first driven shaft (15) both pass through the mounting plate (8) and the first bearing mounting seat (9). One end of the second driven shaft (20) and one end of the third driven shaft (23) both pass through the mounting plate (8) and the second bearing mounting seat (25). The connection between the drive shaft (4) and the first driven shaft (15) and the first bearing mounting seat (9), as well as the connection between the second driven shaft (20) and the third driven shaft (23) and the second bearing mounting seat (25), are provided with a first deep groove ball bearing (32) and a bore elastic retaining ring (41). The mounting plate (8) is symmetrically provided with U-shaped stop blocks (26) on both sides, and the three-way pipe joint (12) is fixed on the side of the stop block (26); the stop block (26) is arranged along the extension direction of the drive shaft (4), and the end of the stop block (26) is provided with a parallel connecting plate (13). The other end of the drive shaft (4), the other end of the first driven shaft (15), the other end of the second driven shaft (20) and the other end of the third driven shaft (23) all pass through the connecting plate (13), and the connection between the drive shaft (4), the first driven shaft (15), the second driven shaft (20) and the third driven shaft (23) and the connecting plate (13) is provided with a first shaft elastic retaining ring (14) and a third deep groove ball bearing (36).

8. The low-pulsation peristaltic pump with power transmission according to claim 7, characterized in that, The inner side of the stop (26) is provided with a guide plate (39). One end of the guide plate (39) is connected to the mounting plate (8), and the other end of the guide plate (39) is connected to the connecting plate (13). The upper and lower sides of the elastic hose (11) are provided with guide plates (39). When the roller (19) squeezes the elastic hose (11), the distance h between the upper and lower layers of the elastic hose (11) wall is kept at 2×(70%~90%)t, where t is the wall thickness of the elastic hose (11) in mm.

9. The low-pulsation peristaltic pump with power transmission according to claim 8, characterized in that, The rollers (19) are installed on the transmission belt of the transmission belt assembly at three equal positions. There are three sets of rollers (19) between the first transmission belt (10) and the second transmission belt (27), and three sets of rollers (19) between the second transmission belt (27) and the third transmission belt (44). The distance between the six sets of rollers (19) is 1 / 6 of the total length of the transmission belt.

10. The low-pulsation peristaltic pump with power transmission according to claim 9, characterized in that, The value of L is 1 / 6 of the total length of the transmission belt.

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