Power transmission low-pulsation peristaltic pump

Abstract

The utility model discloses a power transmission low-pulsation peristaltic pump, which is characterized in that converging or shunting of an elastic hose is realized by utilizing a three-way pipe joint, a rotating mechanism is horizontally arranged on two sides of the elastic hose and is connected with a driving mechanism, and a plurality of groups of roller pressure pipe components are alternately and uniformly distributed on the rotating mechanism; the driving mechanism drives the rotating mechanism to drive the roller pipe pressing assembly to rotate; when the distance that the rollers on the two sides of the first elastic hose extrude the hose reaches L, the rollers on the two sides of the second elastic hose begin to extrude the hose; when the extrusion distance of the second elastic hose reaches L, the rollers on the two sides of the first elastic hose loosen the hose, then a new round of extrusion begins, and when the extrusion distance reaches L, the second elastic hose begins to conduct a new round of extrusion; and the two groups of elastic hoses are alternately extruded by circulating dislocation. The peristaltic pump solves the problem that fluid is polluted due to the fact that the inner wall of a hose in an existing peristaltic pump is seriously abraded and a large number of particles are generated, and pulsation during liquid transmission is effectively reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of fluid filling pumps, and particularly relates to a power transmission low-pulsation peristaltic pump. Background Art

[0002] A peristaltic pump is a liquid conveying device with controllable flow rate. The peristaltic pump uses a rotating roller to roll and press an elastic hose, and the fluid in the hose moves as the roller rotates, just like squeezing a hose with two fingers. As the fingers move, the liquid flows accordingly.

[0003] The existing peristaltic pump relies on a roller pressing tube assembly with a rotating device to rotate and roll the hose to discharge the fluid, and the amount of fluid rolled and extruded depends on the number of turns or angle of rotation of the roller pressing tube assembly. For each filling, the initial position and the end position of the roller pressing tube assembly rolling the hose will not be at the same position due to the accumulation of the number of turns or angles, and there are also differences in the elastic recovery of the hose at different positions, making it difficult for the traditional peristaltic pump to achieve the expected effect in terms of repeated filling accuracy.

[0004] The filling volume range of the existing peristaltic pump for a single filling is not wide, and there are limitations. Currently, there are peristaltic pumps with different flow rate ranges for micro flow, small flow, medium flow, and large flow transmission in the market. There is a lack of a high-precision continuous filling peristaltic pump that is not restricted by the flow rate range. Summary of the Utility Model

[0005] The technical problem to be solved by the utility model is to solve the problems in the existing peristaltic pump that the inner wall of the hose is severely worn, a large amount of particles are generated, resulting in fluid contamination, and the repeated filling accuracy is low and the filling range is narrow, and to provide a power transmission low-pulsation peristaltic pump with a compact structure, convenient disassembly and assembly, high reliability, low inner wall wear of the hose, high repeated filling accuracy and low cost.

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

[0007] A power transmission low-pulsation peristaltic pump, comprising a mounting bracket, on which a driving mechanism, a rotating mechanism, a roller tube pressing assembly and a hose assembly are provided; the hose assembly includes a three-way pipe joint and an elastic hose, and the elastic hose includes a first elastic hose and a second elastic hose arranged side by side. The three-way pipe joint is located at both ends outside the pump body and is used to realize the confluence or diversion of the first elastic hose and the second elastic hose in the pump body; the rotating mechanism is connected to the output end of the driving mechanism. The rotating mechanism includes an arc section and a straight section. The straight section of the rotating mechanism is arranged horizontally on opposite sides of the elastic hose, and multiple groups of roller tube pressing assemblies are alternately and evenly distributed on the rotating mechanism; driven by the driving mechanism, the rotating mechanisms on both sides of the elastic hose perform synchronous circular rotation to drive the roller tube pressing assemblies to rotate synchronously; when the roller tube pressing 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 to a distance of L, the roller tube pressing assemblies on both sides of the second elastic hose rotate to the straight section of the rotating mechanism and start squeezing the second elastic hose; when the squeezing distance of the roller tube pressing assembly on the second elastic hose reaches L, the roller tube pressing assemblies on both sides of the first elastic hose rotate to the arc section of the rotating mechanism, and the roller tube pressing assemblies release the first elastic hose; and the first elastic hose starts a new round of squeezing. When the distance of the first elastic hose reaches L, the second elastic hose starts a new round of squeezing. When the squeezing distance of the second elastic hose reaches L, the first elastic hose starts another round of squeezing; so on and so forth in a cyclic dislocation manner, alternately squeezing the first elastic hose and the second elastic hose; the value of L is the distance between the roller tube pressing assemblies on the rotating mechanism.

[0008] As a further improvement of the present utility model, the driving mechanism includes a driving component and an external PLC controller; the driving component is installed on the 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 utility model, the rotation mechanism includes a mounting seat disposed on the mounting bracket, and a driven gear, a first driven shaft, a driving shaft, a driving gear, a second driven shaft, a third driven shaft and a belt transmission assembly disposed on the mounting seat; the output end of the driving assembly is connected to the driving shaft, the driving gear is mounted on the driving shaft, the driven gear is mounted on the first driven shaft, and the driving shaft is rotationally connected to the first driven shaft through the meshing of the driving gear and the driven gear; the belt transmission assemblies are respectively located on the upper and lower sides of the flexible hose, and a plurality of roller tube pressing assemblies are evenly distributed on the belt transmission assemblies; the driving shaft and the second driven shaft are respectively connected to the two ends of the belt transmission assembly on the lower side of the flexible hose, and the first driven shaft and the third driven shaft are respectively connected to the two ends of the belt transmission assembly on the upper side of the flexible hose; driven by the driving assembly, the driving shaft rotates, and drives the first driven shaft, the second driven shaft and the third driven shaft to rotate, so as to realize the rotation of the belt transmission assemblies on the upper and lower sides of the flexible hose, and further drive the roller tube pressing assemblies to squeeze or loosen the flexible hose.

[0010] As a further improvement of the present utility model, the belt transmission assembly includes a first transmission belt, a transmission wheel, a second transmission belt and a third transmission belt, and the two ends of the first transmission belt, the second transmission belt and the third transmission belt are respectively connected by the transmission wheel for transmission; on the same side of the flexible hose, the first transmission belt, the second transmission belt and the third transmission belt are in the same horizontal plane; roller tube pressing assemblies are correspondingly connected between the first transmission belt and the third transmission belt, and between the second transmission belt and the third transmission belt, and the roller tube pressing assemblies rotate synchronously with the first transmission belt, the second transmission belt and the third transmission belt; the roller tube pressing assemblies between the first transmission belt and the third transmission belt are located on the opposite sides of the first flexible hose, and the roller tube pressing assemblies between the second transmission belt and the third transmission belt are located on the opposite sides of the second flexible hose, and the roller tube pressing assemblies on both sides of the first flexible hose and the roller tube pressing assemblies on both sides of the second flexible hose are arranged alternately to alternately and staggeredly squeeze the two groups of flexible hoses.

[0011] As a further improvement of the present utility model, the driving assembly adopts a stepping motor or a servo motor or a motor driving unit; the belt transmission assembly adopts a synchronous belt transmission assembly or a chain transmission assembly.

[0012] As a further improvement of the present utility model, the roller tube pressing assembly includes a V-shaped bearing, an open split pin, a roller shaft, a roller, a second deep groove ball bearing and a second shaft retaining snap ring; the roller is nested on the outer periphery of the roller shaft through the second deep groove ball bearing, both sides of the roller shaft are respectively fixed on the transmission belt by screws, and both ends of the roller shaft are respectively nested in the V-shaped bearing and fixed by an open split pin.

[0013] As a further improvement of the present utility model, one end of the driving shaft and one end of the first driven shaft both penetrate through 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 through the mounting plate and the second bearing mounting seat, and first deep groove ball bearings and snap rings for holes are provided at the joints of the driving shaft and the first driven shaft with the first bearing mounting seat, and at the joints of the second driven shaft and the third driven shaft with the second bearing mounting seat;

[0014] Symmetrically arranged on both sides of the mounting plate are U-shaped blocks, and the three-way pipe joint is fixed to the side of the block; the blocks are arranged along the extending direction of the driving shaft, and parallel connecting plates are provided at the ends of the blocks. The other ends of the driving shaft, the first driven shaft, the second driven shaft, and the third driven shaft all penetrate through the connecting plates, and first shaft snap rings and third deep groove ball bearings are provided at the joints of the driving shaft, the first driven shaft, the second driven shaft, and the third driven shaft with the connecting plates.

[0015] As a further improvement of the present utility model, a guide plate is provided inside the 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 arranged in parallel along 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-shaped bearings to achieve guiding; when the roller presses the elastic hose, the guide rails on the guide plate abut against the V-shaped bearings, so that the distance h between the upper layer and the lower layer of the tube wall of the elastic hose is maintained at 2×(70% - 90%)t, where t is the tube wall thickness of the elastic hose, in mm.

[0016] As a further improvement of the present utility model, the rollers are installed at the positions of one-third division on the conveyor belt. There are three groups of rollers between the first conveyor belt and the third conveyor belt, and three groups of rollers between the second conveyor belt and the third conveyor belt. The distance between the six groups of rollers is 1 / 6 of the total length of the conveyor belt.

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

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

[0019] The low-pulsation peristaltic pump for power transmission of the present utility model realizes the confluence or divergence of two groups of elastic hoses in the pump body by arranging three-way pipe joints at both ends outside the pump body; connects the rotating mechanism to the output end of the driving mechanism, and arranges the linear segment of the rotating mechanism horizontally on both sides opposite to the elastic hoses, and evenly distributes multiple groups of roller tube pressing assemblies on the rotating mechanism; uses the driving mechanism to drive the rotating mechanisms on both sides of the elastic hoses to perform synchronous circular rotation, that is, drives the roller tube pressing assemblies to rotate synchronously; when the roller tube pressing assemblies on both sides of the first elastic hose rotate to the linear segment of the rotating mechanism and move linearly while squeezing the first elastic hose to a distance of L, the roller tube pressing assemblies on both sides of the second elastic hose rotate to the linear segment of the rotating mechanism and start squeezing the second elastic hose; when the squeezing distance of the roller tube pressing assemblies on the second elastic hose reaches L, the roller tube pressing assemblies on both sides of the first elastic hose rotate to the arc segment of the rotating mechanism, and the roller tube pressing assemblies release the first elastic hose; at the same time, the first elastic hose starts a new round of squeezing. When the distance of the first elastic hose reaches L, the second elastic hose starts a new round of squeezing. When the squeezing distance of the second elastic hose reaches L, the first elastic hose starts another round of squeezing; so on and so forth, alternately squeezing the first elastic hose and the second elastic hose in a cyclic misalignment manner. The elastic hose can also elastically recover periodically. Also, because the double rollers rotate synchronously to squeeze the elastic hose, the shearing of the liquid molecules during filling and the wear of the hose can be minimized, avoiding the risk of fluid contamination caused by severe wear of the inner wall of the hose and generation of a large number of particles, effectively extending the service life of the pump tube. Since the initial position of the roller tube pressing assembly for each fluid filling is the same, the repeated filling accuracy can be greatly improved; the purpose that the double-tube transmission of the peristaltic pump is not restricted by the flow range is achieved. At the same time, due to the design method of double-pipeline pulse cancellation with a phase difference (there is a time difference in the extrusion of the two pipelines by the rollers), the pulsation is effectively reduced and the filling accuracy is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 FIG. is a schematic diagram of the main view structural principle of the low-pulsation peristaltic pump for power transmission in a specific embodiment of the present utility model.

[0021] Figure 2 FIG. is a schematic diagram of the top view structural principle of the low-pulsation peristaltic pump for power transmission in a specific embodiment of the present utility model.

[0022] Figure 3 FIG. is a schematic diagram of the left view structural principle of the low-pulsation peristaltic pump for power transmission in a specific embodiment of the present utility model.

[0023] Figure 4 In a specific embodiment of the present utility model Figure 1 FIG. is a schematic diagram of the sectional view structural principle in the B-B direction.

[0024] Figure 5 In a specific embodiment of the present utility model Figure 1 is a schematic diagram of the sectional structure principle in the A-A direction.

[0025] Figure 6 is a schematic diagram of the three-dimensional axonometric projection structure principle of the power transmission low-pulsation peristaltic pump in a specific embodiment of the present utility model.

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

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

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

[0029] Legend: 1. mounting base plate; 2. drive assembly; 3. mounting seat; 4. driving 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. elastic hose; 111. first elastic hose; 112. second elastic hose; 12. three-way pipe joint; 13. connecting plate; 14. first shaft circlip; 15. first driven shaft; 16. V-shaped bearing; 17. split 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; 34. second O-ring; 35. second deep groove ball bearing; 36. third deep groove ball bearing; 37. second shaft circlip; 38. bushing; 39. guide plate; 391. guide rail; 40. main gear; 41. hole circlip; 42. screw; 43. second spring washer; 44. third transmission belt. Specific embodiments

[0030] The present utility model will be further described below in conjunction with the accompanying drawings of the specification and specific preferred embodiments, but the protection scope of the present utility model is not limited thereby.

[0031] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "side", "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0032] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, the meaning of "a plurality" is two or more unless otherwise specifically defined.

[0033] Embodiment

[0034] As Figures 1 to 9 shown, the low-pulsation peristaltic pump for power transmission of the present utility model includes a mounting bracket, 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 feet 28; the mounting seat 3 and the mounting plate 8 are arranged on the mounting base plate 1 in the vertical direction, the mounting plate 8 is provided with a plurality of mounting holes, and the right support plate 6 and the left support plate 22 are respectively arranged on both sides of the mounting plate 8 in the vertical direction; the feet 28 are mounted at the four vertices of the mounting base plate 1 through nuts 29, first spring washers 30 and flat washers 31. A driving mechanism, a rotating mechanism, a roller tube pressing assembly and a hose assembly are provided on the mounting bracket. The hose assembly includes a three-way pipe joint 12 and an elastic hose 11, and the elastic hose 11 includes a first elastic hose 111 and a second elastic hose 112 arranged side by side. The three-way pipe joint 12 is located at both ends outside the pump body and is used to realize the confluence or diversion of the two groups of elastic hoses 11 in the pump body. The rotating mechanism is connected to the output end of the driving mechanism. The rotating mechanism includes an arc section and a straight section. The straight section of the rotating mechanism is arranged horizontally on the opposite sides of the elastic hose 11, and multiple groups of roller tube pressing assemblies are alternately and evenly distributed on the rotating mechanism. Driven by the driving mechanism, the rotating mechanisms on both sides of the elastic hose 11 perform synchronous circular rotation to drive the roller tube pressing assemblies to rotate synchronously. When the roller tube pressing assemblies on both sides of the first elastic hose 111 rotate to the straight section of the rotating mechanism and move linearly while squeezing the first elastic hose 111 to a distance of L, the roller tube pressing assemblies on both sides of the second elastic hose 112 rotate to the straight section of the rotating mechanism and start to squeeze the second elastic hose 112; when the squeezing distance of the roller tube pressing assemblies on the second elastic hose 112 reaches L, the roller tube pressing assemblies on both sides of the first elastic hose 111 rotate to the arc section of the rotating mechanism, and the roller tube pressing assemblies release the first elastic hose 111; and the first elastic hose 111 starts a new round of squeezing. When the distance of the first elastic hose 111 reaches L, the second elastic hose 112 starts a new round of squeezing. When the squeezing distance of the second elastic hose 112 reaches L, the first elastic hose 111 starts another round of squeezing; and so on, alternately squeezing the first elastic hose 111 and the second elastic hose 112 in a cyclic and staggered manner. The value of L is the spacing between the roller tube pressing assemblies on the rotating mechanism to realize the equidistant and alternately staggered squeezing of the elastic hose 11 by the roller assemblies.

[0035] In this embodiment, by providing three-way pipe connectors 12 at both ends outside the pump body, the confluence or divergence of two groups of flexible hoses 11 in the pump body is achieved; the rotating mechanism is connected to the output end of the motor driving mechanism, and the linear segment of the rotating mechanism is arranged horizontally on the opposite sides of the flexible hose 11, and multiple groups of roller tube pressing assemblies are evenly distributed on the rotating mechanism; the driving mechanism is used to drive the rotating mechanisms on both sides of the flexible hose to rotate synchronously in a circular motion, that is, to drive the roller tube pressing assemblies to rotate synchronously; when the roller tube pressing assemblies on both sides of the first flexible hose 111 rotate to the linear segment of the rotating mechanism and the extrusion distance of the first flexible hose 111 reaches L, the roller tube pressing assemblies on both sides of the second flexible hose 112 rotate to the linear segment of the rotating mechanism and start to extrude the second flexible hose 112; when the extrusion distance of the roller tube pressing assemblies on the second flexible hose 112 reaches L, the roller tube pressing assemblies on both sides of the first flexible hose 111 rotate to the arc segment of the rotating mechanism, and the roller tube pressing assemblies release the first flexible hose 111; at the same time, the other end of the first flexible hose 111 starts a new round of extrusion. When the extrusion distance of the first flexible hose 111 reaches L, the first round of extrusion of the second flexible hose 112 ends and a new round of extrusion starts. When the extrusion distance of the second flexible hose 112 reaches L, the second round of extrusion of the first flexible hose 111 ends and another round of extrusion starts; in this way, cyclic misalignment occurs, alternately extruding the first flexible hose 111 and the second flexible hose 112. The flexible hose 11 can also elastically recover periodically. Also, because it is the synchronous rotation of double rollers to extrude the flexible hose, the shear of the liquid molecules during filling and the wear of the hose can be minimized, avoiding 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 tube pressing assembly for each fluid filling is the same, the repeated filling accuracy can be greatly improved; the purpose that the double-tube transmission of the peristaltic pump is not limited by the flow range is achieved. At the same time, due to the design method of double-pipeline pulse cancellation with a phase difference (there is a time difference in the extrusion of the two pipelines by the rollers), the pulsation is effectively reduced and the filling accuracy is improved.

[0036] As Figure 2 shown, in this embodiment, the driving mechanism includes a driving component 2 and an external PLC controller (not shown in the figure). The driving component 2 is installed on the mounting seat 3, and the output end of the driving component 2 is connected to the rotating mechanism. The driving component 2 and the PLC controller are electrically connected, and the PLC controller controls the operation of the driving component 2. For example, controlling the start and stop, forward and reverse rotation, full speed, speed regulation, and flow calibration of the driving component 2, etc., to improve the control accuracy of filling. Further, the driving component 2 can specifically adopt a motor or a driving unit such as a stepper motor or a servo motor, as long as it can drive the rotating mechanism to rotate smoothly and realize the smooth extrusion of the flexible hose by the roller tube pressing assembly.

[0037] As Figure 1 、Figure 3 and Figure 7 As shown in Figure 7 , the rotating mechanism includes a mounting plate 8 provided on a mounting bracket, and a driven gear 5, a first driven shaft 15, a driving shaft 4, a main gear 40, a second driven shaft 20, a third driven shaft 23 and a belt transmission assembly provided on the mounting plate 8. The output end of the driving assembly 2 is connected to the driving shaft 4. The main gear 40 is mounted on the driving shaft 4, and the driven gear 5 is mounted on the first driven shaft 15. The driving shaft 4 is rotationally connected to the first driven shaft 15 through the meshing of the main gear 40 and the driven gear 5. The belt transmission assemblies are respectively located on the upper and lower sides of the flexible hose 11, and a plurality of roller tube pressing assemblies are evenly distributed on the belt transmission assemblies. The driving shaft 4 and the second driven shaft 20 are respectively connected to the two ends of the belt transmission assembly on the lower side of the flexible hose 11, and the first driven shaft 15 and the third driven shaft 23 are respectively connected to the two ends of the belt transmission assembly on the upper side of the flexible hose 11. Driven by the driving assembly 2, the driving shaft 4 rotates. The driving shaft 4 and the first driven shaft 15 are connected by transmission through the meshing of the main gear 40 and the driven gear 5. The driving shaft 4 and the second driven shaft 20 are connected by transmission through the belt transmission assembly. The first driven shaft 15 and the third driven shaft 23 are connected by transmission through the belt transmission assembly. That is, the driving shaft 4, the first driven shaft 15, the second driven shaft 20 and the third driven shaft 23 are synchronously rotated, the belt transmission assemblies on the upper and lower sides of the flexible hose 11 are rotated, and then the roller tube pressing assemblies are driven to squeeze or release the flexible hose 11.

[0038] As Figure 2 and Figure 3As shown, the belt assembly includes a first belt 10, a drive pulley 21, a second belt 27, and a third belt 44. Both ends of the first belt 10 are respectively connected by the drive pulley 21 for transmission connection. Both ends of the second belt 27 are also respectively connected by the drive pulley 21 for transmission connection. Both ends of the third belt 44 are also respectively connected by the drive pulley 21 for transmission connection. For example, three drive pulleys 21 are simultaneously provided on the driving shaft 4. One of the drive pulleys 21 is used to connect one end of the first belt 10, another drive pulley 21 is used to connect one end of the second belt 27, and yet another drive pulley 21 is used to connect one end of the third belt 44. Three drive pulleys 21 are also simultaneously provided on the second driven shaft 20. A bushing 38 is provided between adjacent drive pulleys 21 for isolation. One of the drive pulleys 21 is used to connect the other end of the first belt 10, another drive pulley 21 is used to connect the other end of the second belt 27, and yet another drive pulley 21 is used to connect the other end of the third belt 44. Thus, both ends of the belt are respectively connected by the drive pulley 21 for transmission connection. At the same time, on the same side of the flexible hose 11, the first belt 10, the second belt 27, and the third belt 44 are in the same horizontal plane. The roller tube pressing assemblies between the first belt 10 and the third belt 44 are located on opposite sides of the first flexible hose 111. The roller tube pressing assemblies between the second belt 27 and the third belt 44 are located on opposite sides of the second flexible hose 112. And the roller tube pressing assemblies on both sides of the first flexible hose 111 and the roller tube pressing assemblies on both sides of the second flexible hose 112 are arranged alternately to alternately and staggeredly press the two groups of flexible hoses 11.

[0039] As Figure 3 shown, the roller tube pressing assembly includes a V-shaped bearing 16, a split 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 on the outer periphery of the roller shaft 18 through the second deep groove ball bearing 35. Both sides of the roller shaft 18 are respectively fixed on the belt by screws 42 and second spring washers 43. Both ends of the roller shaft 18 are respectively nested in the V-shaped bearing 16 and are fixed by setting split pins 17. The roller tube pressing assemblies are installed on the third belt 44 and the second belt 27 in the same form.

[0040] Further, the roller 19 is installed at the trisecting position on the belt, that is, three groups of rollers 19 are evenly distributed on both the first belt 10 and the third belt 44, and three groups of rollers 19 are also evenly distributed on both the third belt 44 and the second belt 27. As Figure 1 and Figure 2As shown, the spacing L between the six groups of rollers 19 is 1 / 6 of the total length of the conveyor belt. The rollers 19 on both sides of the first elastic hose 111 and the second elastic hose 112 extrude the hoses in a front-to-back sequence, and the spacing L between the front and rear groups of rollers 19 is exactly 1 / 6 of the total length of the conveyor belt, realizing equidistant and alternating staggered extrusion of the elastic hose 11. When extruding the elastic hose 11, the distance h between the upper layer and the lower layer of the hose wall of the elastic hose 11 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, achieving large-range flow filling. During the extrusion filling process, the double roller groups on both the upper and lower sides of the elastic hose 11 rotate automatically and move linearly along the straight line direction to extrude the elastic hose 11, minimizing both the shearing of the filled liquid molecules and the wear of the elastic hose 11. Due to the use of the filling method of double-pipeline pulse cancellation, the pulsation during fluid filling is effectively reduced.

[0041] Since the rollers 19 are installed at the positions of the three equal parts of the circumferential perimeter dimension of the conveyor belt, and the linear distances between the three rollers 19 are all the same, during each filling, the initial positions and distances of the linear extrusion and separation of the rollers 19 from the elastic hose 11 are the same, thus achieving the purpose of high-precision repeated filling. For elastic hoses 11 of different specifications, as long as they have the same wall thickness, they can be installed on the equipment for filling, enabling large-range flow filling. Further, the conveyor belt assembly can adopt synchronous belt drive, chain drive, or other similar drive methods, as long as it can drive the rollers 19 to stably extrude the elastic hose 11 and achieve low-pulsation metering filling of the material.

[0042] As Figure 4 and Figure 5 shown, the first bearing mounting seat 9 and the second bearing mounting seat 25 are both installed through the mounting plate 8 and fixed by small round nuts 7, and first O-ring seals 33 are 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 driving shaft 4 and one end of the first driven shaft 15 both penetrate through the mounting plate 8 and the first bearing mounting seat 9, and one end of the second driven shaft 20 and one end of the third driven shaft 23 both penetrate through the mounting plate 8 and the second bearing mounting seat 25. First deep groove ball bearings 32, hole retaining snap rings 41, and second O-ring seals 34 are provided at the connections between the driving shaft 4 and the first driven shaft 15 and the first bearing mounting seat 9, and between the second driven shaft 20 and the third driven shaft 23 and the second bearing mounting seat 25.

[0043] As Figure 3 、 Figure 6 and Figure 8As shown, the left and right sides of the mounting plate 8 are symmetrically provided with U-shaped blocks 26, and the three-way pipe joint 12 is fixed on the side of the block 26, and the block 26 can play the role of installing and fixing the three-way pipe joint 12. At the same time, the inner side of the block 26 contacts the roller 19 at the arc section of the transmission belt, so that the roller 19 rotates 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. The two blocks 26 are arranged along the extension direction of the driving shaft 4, and the ends of the blocks 26 are provided with two connecting plates 13 in the vertical direction. The other end of the driving shaft 4 and the other end of the second driven shaft 20 both penetrate the connecting plate 13 located at the upper layer, and the other end of the first driven shaft 15 and the other end of the third driven shaft 23 both penetrate the connecting plate 13 located at the lower layer. A first shaft elastic ring 14 and a third deep groove ball bearing 36 are provided at the connection points between the driving shaft 4, the first driven shaft 15, the second driven shaft 20 and the third driven shaft 23 and the connecting plate 13, which ensures that each transmission shaft is firmly installed without affecting the smooth operation of the transmission shaft.

[0044] like Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, a guide plate 39 is provided inside the stopper 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, and guide plates 39 are provided on both the upper and lower sides of the elastic hose 11. Figure 9 As shown, a plurality of guide rails 391 are arranged on the guide plate 39 in parallel along the setting direction of the elastic hose 11, that is, the guide rails 391 are arranged along the straight section of the transmission belt, and the guide rails 391 face the elastic hose 11. The guide rails 391 match the V-bearing 16 to achieve auxiliary guidance and improve the displacement accuracy of the roller 19. When the roller 19 squeezes the elastic hose 11, the elastic hose 11 will generate an extrusion reaction force to push the roller 19 outward. While the V-bearing 16 rolls along the guide rails 391, the guide rails 391 can also be used to resist the V-bearing 16, so that the distance h between the upper layer and the lower layer of the tube wall of the elastic hose 11 is maintained at 2×(70%~90%)t, where t is the tube wall thickness of the elastic hose 11, mm. In other words, 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 filling. Furthermore, by spatially connecting the guide plate 39 and the stopper 26 through the mounting plate 8 and the connecting plate 13, the displacement of the two components during the filling process can be reduced to a minimum, which is beneficial to improving the filling accuracy.

[0045] In this embodiment, during each filling operation, the driving shaft 4, the first driven shaft 15, the second driven shaft 20, and the third driven shaft 23 rotate to drive 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 circular motion. The upper and lower rollers 19 mounted on the first transmission belt 10, the third transmission belt 44, and the second transmission belt 27 are driven to perform circular motion together. The upper and lower rollers 19 rotate and squeeze the elastic hose 11 along the straight segment of the circle and move forward in a straight line direction until they reach the circular arc segment and start to disengage from squeezing the elastic hose 11, completing a double-line low-pulse fluid filling. Immediately, the next filling with the same synchronous distance as the initial squeezing position and disengagement position is carried out, greatly improving the repeated filling accuracy of the peristaltic pump. Moreover, with the two-roller misalignment structure of double-line pulse cancellation, the fluid transmission pulsation is lower.

[0046] As Figure 1 and Figure 6 shown in [relevant reference], in this embodiment, the working principle of the low-pulse linear peristaltic pump is as follows: When the first set of rollers 19 on both sides of the first elastic hose 111 rotate to the straight segment of the rotating mechanism and squeeze the first elastic hose 111 by 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 rotate to the straight segment of the rotating mechanism and start to squeeze the second elastic hose 112. When the first set of rollers 19 on both sides of the second elastic hose 112 squeeze the second elastic hose 112 by a distance L, the first set of rollers 19 on both sides of the first elastic hose 111 rotate to the circular arc segment of the rotating mechanism and start to disengage from squeezing the first elastic hose 111, and the second set of rollers 19 on both sides of the first elastic hose 111 rotate to the straight segment of the rotating mechanism and start to squeeze the first elastic hose 111. When the second set of rollers 19 on both sides of the first elastic hose 111 squeeze the first elastic hose 111 by a distance L, the second set of rollers 19 on both sides of the second elastic hose 112 also rotate to the straight segment of the rotating mechanism and start to squeeze the second elastic hose 112. When the second set of rollers 19 on both sides of the second elastic hose 112 squeeze the second elastic hose 112 by a distance L, the second set of rollers 19 on both sides of the first elastic hose 111 rotate to the circular arc segment of the rotating mechanism and start to disengage from squeezing the first elastic hose 111, and the third set of rollers 19 on both sides of the first elastic hose 111 rotate to the straight segment of the rotating mechanism and start to squeeze the first elastic hose 111. When the third set of rollers 19 on both sides of the first elastic hose 111 squeeze 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 rotate to the straight segment of the rotating mechanism and start to squeeze the second elastic hose 112. Such cyclic misalignment is used to squeeze the first elastic hose 111 and the second elastic hose 112 respectively, and by means of double-line pulse cancellation with a time difference, the purpose of reducing the pulsation during liquid transmission is achieved.

[0047] Although the present utility model is disclosed above with preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the art can make many possible changes and modifications to the technical solution of the present utility model by using the methods and technical contents disclosed above, or modify it into equivalent embodiments with equivalent changes, without departing from the spirit and technical solution of the present utility model. Therefore, any simple modification, equivalent replacement, equivalent change and modification made to the above embodiments according to the technical essence of the present utility model without departing from the technical solution of the present utility model still fall within the scope of protection of the technical solution of the present utility model.

Claims

1. A power transmission low pulsation peristaltic pump, characterized in that: The invention comprises a mounting bracket, on which a driving mechanism, a rotating mechanism, a roller tube pressing assembly and a hose assembly are arranged; the hose assembly comprises a three-way pipe joint (12) and an elastic hose (11); the elastic hose (11) comprises a first elastic hose (111) and a second elastic hose (112) arranged side by side; the three-way pipe joint (12) is located at two ends outside a pump body and is used to realize the merging or diverging of the first elastic hose (111) and the second elastic hose (112) in the pump body; the rotating mechanism is connected to the output end of the driving mechanism, the rotating mechanism comprises an arc segment and a straight segment, the straight segment of the rotating mechanism is arranged on two opposite sides of the elastic hose (11) in the horizontal direction, and a plurality of roller tube pressing assemblies are alternately and evenly distributed on the rotating mechanism; under the drive of the driving mechanism, the rotating mechanisms located on both sides of the elastic hose (11) perform synchronous annular rotation to drive the roller tube pressing assembly to rotate synchronously; when the roller tube pressing assemblies on both sides of the first elastic hose (111) rotate to the straight segment of the rotating mechanism, When the distance of squeezing the first elastic hose (111) reaches L while moving in a straight line, the roller tube pressing assemblies on both sides of the second elastic hose (112) rotate to the straight section of the rotating mechanism and start squeezing the second elastic hose (112); when the squeezing distance of the second elastic hose (112) by the roller tube pressing assemblies reaches L, the roller tube pressing assemblies on both sides of the first elastic hose (111) rotate to the arc section of the rotating mechanism, and the roller tube pressing assemblies release the first elastic hose (111); and the first elastic hose (111) starts a new round of squeezing; when the squeezing distance of the first elastic hose (111) reaches L, the second elastic hose (112) starts a new round of squeezing; when the squeezing distance of the second elastic hose (112) reaches L, the first elastic hose (111) starts another round of squeezing; in this way, the first elastic hose (111) and the second elastic hose (112) are alternately squeezed in a cyclic dislocation; the value of L is the spacing between the roller tube pressing assemblies on the rotating mechanism.

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

3. The power transmission low pulsation peristaltic pump according to claim 2, characterized in that: The rotating mechanism comprises a mounting plate (8) arranged on a mounting bracket, and a driven gear (5), a first driven shaft (15), a driving shaft (4), a main gear (40), a second driven shaft (20), a third driven shaft (23) and a transmission belt assembly arranged on the mounting plate (8); the output end of the driving assembly (2) is connected to the driving shaft (4), the main gear (40) is installed on the driving shaft (4), the driven gear (5) is installed on the first driven shaft (15), and the main gear (40) is meshed with the driven gear (5) to realize the rotational connection between the driving shaft (4) and the first driven shaft (15); the transmission belt assembly is respectively located at the elastic hose, A plurality of roller tube pressing assemblies are evenly distributed on the upper and lower sides of the transmission belt assembly; the driving 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); 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); under the drive of the driving assembly (2), the driving shaft (4) rotates and drives the first driven shaft (15), the second driven shaft (20) and the third driven shaft (23) to rotate, so as to realize the rotation of the transmission belt assemblies on the upper and lower sides of the elastic hose (11), thereby driving the roller tube pressing assembly to squeeze or release the elastic hose (11).

4. The power transmission low pulsation peristaltic pump according to claim 3, characterized in that: The transmission belt assembly comprises 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 for transmission via 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 located in the same horizontal plane; a roller pressing tube assembly is correspondingly connected between the first transmission belt (10) and the third transmission belt (44), and between the second transmission belt (27) and the third transmission belt (44); The roller tube pressing assembly rotates synchronously with the first transmission belt (10), the second transmission belt (27) and the third transmission belt (44); the roller tube pressing assembly between the first transmission belt (10) and the third transmission belt (44) is located on two opposite sides of the first elastic hose (111), and the roller tube pressing assembly between the second transmission belt (27) and the third transmission belt (44) is located on two opposite sides of the second elastic hose (112); and the roller tube pressing assemblies on both sides of the first elastic hose (111) and the roller tube pressing assemblies on both sides of the second elastic hose (112) are arranged alternately, so as to perform alternate staggered extrusion of the two groups of elastic hoses (11).

5. The power transmission low pulsation peristaltic pump according to claim 4, characterized in that: The driving component (2) adopts a stepping motor or a servo motor or a motor driving unit; the transmission belt component adopts a synchronous belt transmission component or a chain transmission component.

6. The power transmission low pulsation peristaltic pump according to claim 4, characterized in that: The roller tube pressing assembly comprises a V-shaped bearing (16), a split pin (17), a roller shaft (18), a roller (19), a second deep groove ball bearing (35) and a second shaft elastic retaining ring (37); the roller (19) is nested in the outer periphery of the roller shaft (18) through the second deep groove ball bearing (35), the two sides of the roller shaft (18) are respectively fixed to the transmission belt through screws (42), the two ends of the roller shaft (18) are respectively nested in the V-shaped bearing (16), and a split pin (17) is provided for fixing.

7. The power transmission low pulsation peristaltic pump according to claim 6, characterized in that: One end of the driving 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); a first deep groove ball bearing (32) and a hole elastic retaining ring (41) are provided at the connection between the driving 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); The mounting plate (8) is symmetrically provided with U-shaped stoppers (26) on both sides, and a three-way pipe joint (12) is fixed on the side of the stopper (26); the stopper (26) is arranged along the extension direction of the driving shaft (4), and a parallel connecting plate (13) is arranged at the end of the stopper (26); the other end of the driving 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 a first shaft elastic ring (14) and a third deep groove ball bearing (36) are arranged at the connection between the driving shaft (4), the first driven shaft (15), the second driven shaft (20) and the third driven shaft (23) and the connecting plate (13).

8. The power transmission low pulsation peristaltic pump according to claim 7, characterized in that: A guide plate (39) is provided inside the stopper (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), and guide plates (39) are provided on both upper and lower sides of the elastic hose (11); a plurality of guide rails (391) are provided on the guide plate (39) in parallel along the setting direction of the elastic hose (11), and the guide rails (391) face the elastic hose (11), and the guide rails (391) match with the V-shaped bearing (16) to achieve guidance; when the roller (19) squeezes the elastic hose (11), the guide rails (391) on the guide plate (39) abut against the V-shaped bearing (16), so that the distance h between the upper layer and the lower layer of the tube wall of the elastic hose (11) is maintained at 2×(70% to 90%)t, where t is the tube wall thickness of the elastic hose (11), mm.

9. The power transmission low pulsation peristaltic pump according to claim 8, characterized in that: The rollers (19) are installed at three equally divided positions on the transmission belt, three groups of rollers (19) are arranged between the first transmission belt (10) and the third transmission belt (44), three groups of rollers (19) are arranged between the second transmission belt (27) and the third transmission belt (44), and the spacing between the six groups of rollers (19) is 1 / 6 of the total length of the transmission belt.

10. The power transmission low pulsation peristaltic pump according to claim 8, characterized in that: The value of L is 1 / 6 of the total length of the transmission belt.

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