Power transmission low-pulsation peristaltic pump

Abstract

Disclosed in the present invention is a power transmission low-pulsation peristaltic pump. Three-way fittings (12) are utilized to achieve the convergence or divergence of elastic hoses (11). Rotating mechanisms are horizontally arranged on two sides of the elastic hoses (11) and are connected to a driving mechanism. A plurality of roller pipe-pressing assemblies are alternately and uniformly distributed on each rotating mechanism. The driving mechanism drives the rotating mechanisms to drive the roller pipe-pressing assemblies to rotate. When the distance by which rollers on two sides of each first elastic hose (111) press the hose reaches L, rollers on two sides of each second elastic hose (112) start to press the hose. When the distance by which each second elastic hose (112) is pressed reaches L, the rollers (19) on the two sides of each first elastic hose (111) release the hose, and subsequently start to perform a new round of pressing; and when the pressing distance reaches L, each second elastic hose (112) starts to undergo a new round of pressing. By such cyclic alternation, the two elastic hoses (11) are alternately pressed. The present invention solves the problem in existing peristaltic pumps of fluid contamination caused by a large number of particles being generated due to the severe wear of inner walls of hoses, and effectively reduces the pulsation during liquid transmission.

Description

Power transmission low pulsation peristaltic pump

[0001] Cross-reference to related applications

[0002] The present application is based on the Chinese patent application with the application date of "2024-09-03", the application number of "202411229583.5", and the invention name of "A power transmission low pulsation peristaltic pump", and claims the priority thereof, the whole text of the Chinese patent application is hereby incorporated into the present application as a part of the present application.

TECHNICAL FIELD

[0003] The present application belongs to the technical field of fluid filling pumps, and particularly relates to a power transmission low pulsation peristaltic pump.

BACKGROUND

[0004] The peristaltic pump is a liquid delivery device that can control the flow rate. The peristaltic pump uses a rotating roller to roll and press a flexible hose. The fluid in the hose moves with the rotation of the roller, just like squeezing the hose with two fingers. As the fingers move, the liquid flows.

[0005] The existing peristaltic pump relies on a roller pressing pipe assembly with a rotating device to rotate and press the hose to discharge the fluid. The rolling and extrusion amount of the fluid is controlled by the number of turns or the angle of the roller pressing pipe assembly. For each filling, the initial position and the end position of the roller pressing pipe assembly rolling the hose will not be at the same position due to the accumulation of the number of turns or the angle. In addition, the elastic recovery of the hose at different positions also has differences, so that the repeat filling accuracy of the traditional peristaltic pump is difficult to achieve the expected effect.

[0006] The filling amount range of the existing peristaltic pump is not wide and is limited. At present, there are flow range classification peristaltic pumps with micro flow, small flow, medium flow and large flow transmission on the market. There is a lack of a high-precision continuous filling peristaltic pump that is not limited by the flow range.

[0007]

SUMMARY

[0008] The technical problem to be solved by the present application is to solve the problems of serious wear of the inner wall of the hose, generation of a large number of particles, resulting in contamination of the fluid, low repeat filling accuracy, and narrow filling range in the existing peristaltic pump. The present application provides a power transmission low pulsation peristaltic pump with compact structure, convenient disassembly and assembly, high reliability, low wear of the inner wall of the hose, high repeat filling accuracy, and low cost.

[0009] To solve the above technical problems, the present application adopts the following technical scheme:

[0010] The utility model provides a power transmission low pulsation peristaltic pump, including mounting support, which is provided with driving mechanism, rotating mechanism, roller pipe pressing assembly and hose assembly; the hose assembly includes a tee joint and an elastic hose, the elastic hose includes a first elastic hose and a second elastic hose arranged side by side, and the tee joint is located at the two ends outside the pump body to realize the confluence or separation of the first elastic hose and the second elastic hose in the pump body; the rotating mechanism is connected with the output end of the driving mechanism, and the rotating mechanism includes an arc segment and a straight line segment; the straight line segment of the rotating mechanism is arranged on the opposite sides of the elastic hose along the horizontal direction, and a plurality of roller pipe pressing assemblies are alternately and uniformly distributed on the rotating mechanism; under the driving of the driving mechanism, the rotating mechanism on the two sides of the elastic hose rotates synchronously in a ring shape to drive the roller pipe pressing assembly to rotate synchronously; when the roller pipe pressing assemblies on the two sides of the first elastic hose rotate to the straight line segment of the rotating mechanism and move linearly while extruding the first elastic hose to a distance of L, the roller pipe pressing assemblies on the two sides of the second elastic hose rotate to the straight line segment of the rotating mechanism and start to extrude the second elastic hose; when the extrusion distance of the roller pipe pressing assemblies on the two sides of the second elastic hose reaches L, the roller pipe pressing assemblies on the two sides of the first elastic hose rotate to the arc segment of the rotating mechanism, the roller pipe pressing assemblies release the first elastic hose, and the first elastic hose starts a new round of extrusion; when the extrusion distance of the first elastic hose reaches L, the second elastic hose starts a new round of extrusion; when the extrusion distance of the second elastic hose reaches L, the first elastic hose starts another round of extrusion; the first elastic hose and the second elastic hose are alternately extruded in this way; the value of L is the distance between the roller pipe pressing assemblies on the rotating mechanism.

[0011] As a further improvement of the utility model, the driving mechanism includes a driving assembly and an external PLC controller; the driving assembly is installed on the mounting support, and the output end of the driving assembly is connected with the rotating mechanism; the driving assembly and the PLC controller are electrically connected, and the PLC controller controls the operation of the driving assembly.

[0012] As a further improvement of the application, the rotating mechanism comprises a mounting support arranged 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 transmission belt assembly arranged on the mounting support; the output end of the driving assembly is connected with the driving shaft, the driving gear is arranged on the driving shaft, the driven gear is arranged on the first driven shaft, and the driving gear is engaged with the driven gear to realize the rotational connection between the driving shaft and the first driven shaft; the transmission belt assemblies are arranged on the upper and lower sides of the elastic hose respectively, and a plurality of roller pipe pressing assemblies are uniformly arranged on the transmission belt assemblies; the driving shaft and the second driven shaft are respectively connected with 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 with the two ends of the transmission belt assembly on the upper side of the elastic hose; under the driving of 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 transmission belt assemblies on the upper and lower sides of the elastic hose, and further drive the roller pipe pressing assemblies to extrude or loosen the elastic hose.

[0013] As a further improvement of the application, the transmission belt assembly comprises 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 in transmission through the transmission wheel; on the same side of the elastic hose, the first transmission belt, the second transmission belt and the third transmission belt are in the same horizontal plane; the roller pipe 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 pipe pressing assemblies rotate synchronously with the first transmission belt, the second transmission belt and the third transmission belt; the roller pipe pressing assemblies between the first transmission belt and the third transmission belt are arranged on the opposite sides of the first elastic hose, the roller pipe pressing assemblies between the second transmission belt and the third transmission belt are arranged on the opposite sides of the second elastic hose, and the roller pipe pressing assemblies on the two sides of the first elastic hose and the roller pipe pressing assemblies on the two sides of the second elastic hose are alternately arranged to alternately extrude the two groups of elastic hoses.

[0014] As a further improvement of the application, the driving assembly adopts a stepping motor or a servo motor or a motor driving unit; and the transmission belt assembly adopts a synchronous belt transmission assembly or a chain transmission assembly.

[0015] As a further improvement of the application, the roller pipe pressing assembly comprises a V-shaped bearing, a split pin, a roller shaft, a roller, a second deep groove ball bearing and a second shaft elastic retainer; 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 fixed on the transmission belt through screws, and the two ends of the roller shaft are nested in the V-shaped bearing and fixed by the split pin.

[0016] As a further improvement of the application, one end of the driving 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 the connection between the driving shaft and the first driven shaft with the first bearing mounting seat and the connection between the second driven shaft and the third driven shaft with the second bearing mounting seat are both provided with a first deep groove ball bearing and a hole elastic baffle ring.

[0017] The mounting plate is symmetrically provided with U-shaped stop blocks on both sides, and a tee joint is fixed on the side of the stop block. The stop block is arranged along the extension direction of the driving shaft, and the end of the stop block is provided with a parallel connecting plate. The other end of the driving 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 penetrate the connecting plate, and the connecting plate is provided with a first shaft elastic baffle ring and a third deep groove ball bearing at the connection between the driving shaft, the first driven shaft, the second driven shaft and the third driven shaft.

[0018] As a further improvement of the application, the inside of the stop block is provided with a guide plate, one end of the guide plate is connected with the mounting plate, the other end of the guide plate is connected with the connecting plate, and the upper and lower sides of the elastic hose are both provided with the guide plate. A plurality of guide rails are arranged in parallel on the guide plate along the arrangement direction of the elastic hose, and the guide rails face the elastic hose. The guide rails are matched with the V-shaped bearings to realize guiding. When the roller extrudes 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 pipe wall of the elastic hose is maintained as 2x(70%-90%)t, t is the pipe wall thickness of the elastic hose, mm.

[0019] As a further improvement of the application, the roller is installed at a three-equal-part position on the transmission belt. Three groups of rollers are arranged between the first transmission belt and the third transmission belt, and three groups of rollers are arranged between the second transmission belt and the third transmission belt. The distance between the six groups of rollers is 1 / 6 of the total length of the transmission belt.

[0020] As a further improvement of the application, the value of L is 1 / 6 of the total length of the transmission belt.

[0021] Compared with the prior art, the application has the following advantages:

[0022] The power transmission low-pulsation peristaltic pump of the application realizes the confluence or separation of two groups of elastic hoses in the pump body by setting a three-way pipe joint at both ends of the pump body outside; the output end of the rotating mechanism and the driving mechanism are connected, and the straight line segment of the rotating mechanism is arranged in the horizontal direction on the opposite sides of the elastic hose, and a plurality of roller pipe pressing assemblies are uniformly distributed on the rotating mechanism; the rotating mechanism on both sides of the elastic hose is driven by the driving mechanism to rotate synchronously in a ring shape, that is, the roller pipe pressing assemblies are driven to rotate synchronously; when the roller pipe pressing assemblies on both sides of the first elastic hose rotate to the straight line segment of the rotating mechanism and move linearly while extruding the first elastic hose, the distance reaches L, the roller pipe pressing assemblies on both sides of the second elastic hose rotate to the straight line segment of the rotating mechanism and start to extrude the second elastic hose; when the extrusion distance of the roller pipe pressing assemblies on both sides of the second elastic hose reaches L, the roller pipe pressing assemblies on both sides of the first elastic hose rotate to the circular arc segment of the rotating mechanism, and the roller pipe pressing assemblies loosen the first elastic hose; at the same time, the first elastic hose starts a new round of extrusion, and when the distance of the first elastic hose reaches L, the second elastic hose starts a new round of extrusion, and when the extrusion distance of the second elastic hose reaches L, the first elastic hose starts another round of extrusion; such a cycle is repeated, and the first elastic hose and the second elastic hose are alternately extruded, and the elastic hose can also be periodically elastically recovered; because the double rollers rotate synchronously to extrude the elastic hose, the shear of the liquid molecules and the wear of the hose are minimized, the risk of fluid contamination caused by serious wear of the inner wall of the hose and a large number of particles is avoided, the service life of the pump pipe is effectively prolonged, the repeated filling precision is greatly improved because the initial position of the roller pipe pressing assembly for each time of fluid filling is the same, and the purpose of not being limited by the flow range of the peristaltic pump double-pipe transmission is achieved. At the same time, because the design of double-pipe pulse cancellation with phase difference (the extrusion time difference of the two pipes by the rollers) is adopted, the pulsation is effectively reduced, and the filling precision is improved. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 is a front view of the power transmission low-pulsation peristaltic pump of the application.

[0024] Figure 2 is a top view of the power transmission low-pulsation peristaltic pump of the application.

[0025] Figure 3 is a left view of the power transmission low-pulsation peristaltic pump of the application.

[0026] Figure 4 is a cross-sectional view of the power transmission low-pulsation peristaltic pump of the application along the B-B direction in Figure 1.

[0027] Figure 5 is a cross-sectional view of the power transmission low-pulsation peristaltic pump of the application along the A-A direction in Figure 1.

[0028] Fig. 6 is a three-dimensional axonometric projection structural principle schematic view of the power transmission low pulsation peristaltic pump in the embodiment of the present application.

[0029] Fig. 7 is a three-dimensional axonometric projection structural principle schematic view of the power transmission low pulsation peristaltic pump after removing the left block and the upper and lower two connecting plates in the embodiment of the present application.

[0030] Fig. 8 is a three-dimensional axonometric projection structural principle schematic view of the mounting bracket in the embodiment of the present application.

[0031] Fig. 9 is a three-dimensional axonometric projection structural principle schematic view of the guide plate in the embodiment of the present application.

[0032] Fig. 1 is a mounting bottom plate; Fig. 2 is a driving assembly; Fig. 3 is a mounting seat; Fig. 4 is a driving shaft; Fig. 5 is a driven gear; Fig. 6 is a right support plate; Fig. 7 is a small round nut; Fig. 8 is a mounting plate; Fig. 9 is a first bearing mounting seat; Fig. 10 is a first transmission belt; Fig. 11 is an elastic hose; Fig. 111 is a first elastic hose; Fig. 112 is a second elastic hose; Fig. 12 is a three-way pipe joint; Fig. 13 is a connecting plate; Fig. 14 is a first shaft elastic check ring; Fig. 15 is a first driven shaft; Fig. 16 is a V-shaped bearing; Fig. 17 is a split pin; Fig. 18 is a roller shaft; Fig. 19 is a roller; Fig. 20 is a second driven shaft; Fig. 21 is a transmission wheel; Fig. 22 is a left support plate; Fig. 23 is a third driven shaft; Fig. 25 is a second bearing mounting seat; Fig. 26 is a block; Fig. 27 is a second transmission belt; Fig. 28 is a supporting leg; Fig. 29 is a nut; Fig. 30 is a first spring washer; Fig. 31 is a flat washer; Fig. 32 is a first deep groove ball bearing; Fig. 33 is a first O-shaped sealing ring; Fig. 34 is a second O-shaped sealing ring; Fig. 35 is a second deep groove ball bearing; Fig. 36 is a third deep groove ball bearing; Fig. 37 is a second shaft elastic check ring; Fig. 38 is a bushing; Fig. 39 is a guide plate; Fig. 391 is a guide rail; Fig. 40 is a main gear; Fig. 41 is a hole elastic check ring; Fig. 42 is a screw; Fig. 43 is a second spring washer; and Fig. 44 is a third transmission belt.

DETAILED DESCRIPTION

[0033] The present application is further described below in conjunction with the accompanying drawings and specific preferred embodiments, but the protection scope of the present application is not limited by this.

[0034] In the description of the present application, it should be understood that the terms "side", "length", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0035] In addition, the terms "first", "second", etc. are used only for descriptive purposes and are not to be construed as indicating or implying relative importance or a specific number of technical features indicated thereby, so that the features with "first", "second" can include one or more of the features explicitly or implicitly, and the meaning of "multiple" in the description of the present application is two or more, unless otherwise specifically limited.

[0036] Embodiment

[0037] As shown in FIGS. 1-9, the power transmission low-pulse wave peristaltic pump of the present application comprises a mounting bracket, as shown in FIG. 8, which 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 supporting legs 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 arranged on both sides of the mounting plate 8 in the vertical direction; the supporting legs 28 are installed at the four vertices of the mounting base plate 1 through nuts 29, first spring washers 30, and flat washers 31. The mounting bracket is provided with a driving mechanism, a rotating mechanism, a roller pipe pressing assembly, and a hose assembly. The hose assembly includes a three-way pipe joint 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, and the three-way pipe joint 12 is located at both ends outside the pump body to realize the confluence or separation of the two groups of elastic hoses 11 in the pump body. The rotating mechanism is connected with the output end of the driving mechanism, and the rotating mechanism includes a circular arc segment and a straight line segment, the straight line segment of the rotating mechanism is arranged on the opposite sides of the elastic hose 11 in the horizontal direction, and a plurality of roller pipe pressing assemblies are alternately and uniformly arranged on the rotating mechanism. Under the driving of the driving mechanism, the rotating mechanism located on both sides of the elastic hose 11 rotates synchronously in a ring shape to drive the roller pipe pressing assemblies to rotate synchronously. When the roller pipe pressing assemblies on both sides of the first elastic hose 111 rotate to the straight line segment of the rotating mechanism and move linearly while extruding the first elastic hose 111 to a distance of L, the roller pipe pressing assemblies on both sides of the second elastic hose 112 rotate to the straight line segment of the rotating mechanism and start to extrude the second elastic hose 112. When the extrusion distance of the roller pipe pressing assemblies on the second elastic hose 112 reaches L, the roller pipe pressing assemblies on both sides of the first elastic hose 111 rotate to the circular arc segment of the rotating mechanism, and the roller pipe pressing assemblies release the first elastic hose 111; and the first elastic hose 111 starts a new round of extrusion, and when the distance of the first elastic hose 111 reaches L, the second elastic hose 112 starts a new round of extrusion, and when the extrusion distance of the second elastic hose 112 reaches L, the first elastic hose 111 starts another round of extrusion; and the first elastic hose 111 and the second elastic hose 112 are alternately and extruded in this way. The value of L is the distance between the roller pipe pressing assemblies on the rotating mechanism to realize the equal-distance and alternating extrusion of the elastic hose 11 by the roller assemblies.

[0038] In the embodiment, the three-way pipe joint 12 is arranged at both ends of the pump body to realize the confluence or separation of the two groups of elastic hoses 11 in the pump body; the rotating mechanism is connected with the output end of the motor driving mechanism, and the straight line segment of the rotating mechanism is arranged in the horizontal direction on the opposite sides of the elastic hose 11, and the multiple groups of roller pipe pressing assemblies are uniformly distributed on the rotating mechanism; the rotating mechanism on both sides of the elastic hose is driven by the driving mechanism to rotate synchronously in a ring shape, that is, the roller pipe pressing assemblies are driven to rotate synchronously; when the roller pipe pressing assemblies on both sides of the first elastic hose 111 rotate to the straight line segment of the rotating mechanism, the distance of the first elastic hose 111 is squeezed to L, the roller pipe pressing assemblies on both sides of the second elastic hose 112 rotate to the straight line segment of the rotating mechanism, and the second elastic hose 112 starts to be squeezed; when the squeezing distance of the roller pipe pressing assembly to the second elastic hose 112 reaches L, the roller pipe pressing assemblies on both sides of the first elastic hose 111 rotate to the circular arc segment of the rotating mechanism, and the roller pipe pressing assemblies release the first elastic hose 111; at the same time, the other end of 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 ends the first round of squeezing and starts a new round of squeezing, when the squeezing distance of the second elastic hose 112 reaches L, the first elastic hose 111 ends the second round of squeezing and starts another round of squeezing; the first elastic hose 111 and the second elastic hose 112 are alternately squeezed in a cycle staggered manner, and the elastic hose 11 can also be periodically elastically recovered, and because the double rollers rotate synchronously to squeeze the elastic hose, the shear of the liquid molecules and the wear of the hose are minimized, the risk of fluid pollution caused by serious wear of the inner wall of the hose and a large number of particles is avoided, the service life of the pump pipe is effectively prolonged, the repeated filling precision is greatly improved because the initial position of the roller pipe pressing assembly for each time of fluid filling is the same, and the purpose of not being limited by the flow range of the peristaltic pump double-pipe conveying is achieved. At the same time, because the design of the double-pipe pulse cancellation with a phase difference (the two pipes are squeezed by the rollers with a time difference) is adopted, the pulsation is effectively reduced, and the filling precision is improved.

[0039] As shown in FIG. 2, in the embodiment, the driving mechanism includes a driving assembly 2 and an external PLC controller (not shown in the figure). The driving assembly 2 is installed on a mounting seat 3, and the output end of the driving assembly 2 is connected with the rotating mechanism. The driving assembly 2 and the PLC controller are electrically connected, and the PLC controller controls the operation of the driving assembly 2. For example, the driving assembly 2 is controlled to start and stop, forward and reverse, full speed, speed regulation, flow calibration and the like, so as to improve the control precision of filling. Further, the driving assembly 2 can specifically adopt a type of motor or driving unit such as a stepper motor or a servo motor, as long as it can drive the rotating mechanism to rotate stably and realize the stable squeezing of the roller pipe pressing assembly to the elastic hose.

[0040] As shown in FIG. 1, FIG. 3 and FIG. 7, the rotating mechanism comprises a mounting plate 8 arranged on the 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 with the driving shaft 4, the main gear 40 is arranged on the driving shaft 4, the driven gear 5 is arranged on the first driven shaft 15, and the driving shaft 4 and the first driven shaft 15 are rotationally connected through the meshing of the main gear 40 and the driven gear 5. The transmission belt assembly is arranged on the upper and lower sides of the elastic hose 11 respectively, and a plurality of roller pipe pressing assemblies are arranged on the transmission belt assembly. The driving shaft 4 and the second driven shaft 20 are respectively connected with 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 with the two ends of the transmission belt assembly on the upper side of the elastic hose 11. Under the driving of the driving assembly 2, the driving shaft 4 rotates, the driving shaft 4 and the first driven shaft 15 are rotationally connected through the meshing of the main gear 40 and the driven gear 5, the driving shaft 4 and the second driven shaft 20 are rotationally connected through the transmission belt assembly, and the first driven shaft 15 and the third driven shaft 23 are rotationally connected through the transmission belt 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 transmission belt assemblies on the upper and lower sides of the elastic hose 11 are rotated, and then the roller pipe pressing assemblies squeeze or loosen the elastic hose 11.

[0041] As shown in FIG. 2 and FIG. 3, 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, both ends of the first transmission belt 10 are respectively connected in transmission through the transmission wheel 21, both ends of the second transmission belt 27 are also respectively connected in transmission through the transmission wheel 21, both ends of the third transmission belt 44 are also respectively connected in transmission through the transmission wheel 21. For example, three transmission wheels 21 are arranged on the driving shaft 4 at the same time, one of which is used to connect one end of the first transmission belt 10, another one is used to connect one end of the second transmission belt 27, and the other one is used to connect one end of the third transmission belt 44; three transmission wheels 21 are also arranged on the second driven shaft 20 at the same time, a bushing 38 is arranged between adjacent transmission wheels 21 for isolation, one of which is used to connect the other end of the first transmission belt 10, another one is used to connect the other end of the second transmission belt 27, and the other one is used to connect the other end of the third transmission belt 44, so as to realize that both ends of the transmission belt are respectively connected in transmission through the transmission wheel 21. At the same time, 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 in the same horizontal plane; the roller pipe pressing assembly between the first transmission belt 10 and the third transmission belt 44 is located on the opposite sides of the first elastic hose 111, the roller pipe pressing assembly between the second transmission belt 27 and the third transmission belt 44 is located on the opposite sides of the second elastic hose 112, and the roller pipe pressing assemblies on both sides of the first elastic hose 111 and the roller pipe pressing assemblies on both sides of the second elastic hose 112 are alternately arranged to alternately dislocate and extrude the two groups of elastic hoses 11.

[0042] As shown in FIG. 3, the roller pipe 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 elastic collar for shaft 37. The roller 19 is nested in the outer periphery of the roller shaft 18 through the second deep groove ball bearing 35, the roller shaft 18 is fixed on the transmission belt through the screws 42 and the second spring washers 43 on both sides respectively, both ends of the roller shaft 18 are nested in the V-shaped bearing 16 respectively, and the split pin 17 is arranged for fixation. The roller pipe pressing assembly is installed in the same form on the third transmission belt 44 and the second transmission belt 27.

[0043] Further, the rollers 19 are installed at the positions of three equal parts of the transmission belt, that is, three groups of rollers 19 are evenly distributed on the first transmission belt 10 and the third transmission belt 44, and three groups of rollers 19 are also evenly distributed on the third transmission belt 44 and the second transmission belt 27, as shown in FIG. 1 and FIG. 2, the distance L between the six groups 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 are arranged in a front-rear order to extrude the hose, and the distance L between the front and rear groups of rollers 19 is exactly 1 / 6 of the total length of the transmission belt, realizing equal-distance alternating staggered extrusion of the elastic hose 11. When the elastic hose 11 is extruded, the distance h between the upper layer and the lower layer of the wall of the elastic hose 11 is 2x(70%-90%)t, t is the thickness of the wall of the elastic hose 11, mm. The equipment can be installed for filling as long as the elastic hose 11 is of the same wall thickness, realizing large-range flow filling. During the extrusion filling process, the double roller groups on the upper and lower sides of the elastic hose 11 automatically rotate and move in a straight line to extrude the elastic hose 11, and the shear of the liquid molecules and the wear of the elastic hose 11 can be minimized. Due to the adoption of the double-pipeline pulse cancellation filling mode, the pulsation of the fluid during filling is effectively reduced.

[0044] Since the rollers 19 are installed at the positions of three equal parts of the transmission belt, the straight-line distances between the three rollers 19 are consistent, so that the initial position and distance of the straight-line extrusion and disengagement of the rollers 19 from the elastic hose 11 are the same during each filling, achieving the purpose of high-precision repeated filling. For elastic hoses 11 of different specifications, as long as they are of the same wall thickness, the equipment can be installed for filling, and large-range flow filling can be realized. Further, the transmission belt assembly can adopt synchronous belt transmission or chain transmission or other similar transmission modes, as long as it can stably extrude the elastic hose 11 to realize low-pulsation metering filling of materials.

[0045] As shown in FIG. 4 and FIG. 5, the first bearing seat 9 and the second bearing seat 25 are both installed through the mounting plate 8 and are fixed by the small round nut 7, and the connection between the first bearing seat 9 and the second bearing seat 25 and the mounting plate 8 is provided with the first O-shaped sealing ring 33. One end of the driving shaft 4 and one end of the first driven shaft 15 are both installed through the mounting plate 8 and the first bearing seat 9, one end of the second driven shaft 20 and one end of the third driven shaft 23 are both installed through the mounting plate 8 and the second bearing seat 25, and the connection between the driving shaft 4 and the first driven shaft 15 and the first bearing seat 9 and the connection between the second driven shaft 20 and the third driven shaft 23 and the second bearing seat 25 are both provided with the first deep groove ball bearing 32, the elastic baffle ring 41 for hole and the second O-shaped sealing ring 34.

[0046] As shown in FIG. 3, FIG. 6 and FIG. 8, the mounting plate 8 is symmetrically provided with U-shaped stoppers 26 on both sides, and the tee joint 12 is fixed on the side of the stopper 26, which can fix the tee joint 12. At the same time, the inner side of the stopper 26 is in contact with the roller 19 on the circular segment of the transmission belt, so that the roller 19 rotates before entering the straight segment of the transmission belt, and after entering the straight segment of the transmission belt, the roller 19 can travel in the straight direction while rotating and extruding the elastic hose 11. Both stoppers 26 are arranged along the extension direction of the driving shaft 4, and the end of the stopper 26 is provided with two connecting plates 13 in the vertical direction, and the other end of the driving shaft 4 and the other end of the second driven shaft 20 penetrate the connecting plate 13 on the upper layer, and the other end of the first driven shaft 15 and the other end of the third driven shaft 23 penetrate the connecting plate 13 on the lower layer. And the connecting part of 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 is provided with the first shaft elastic retainer 14 and the third deep groove ball bearing 36, which can ensure the stable installation of the transmission shaft and will not affect the smooth operation of the transmission shaft.

[0047] As shown in FIG. 4, FIG. 5, FIG. 6 and FIG. 7, the inner side of the stopper 26 is provided with a guide plate 39, one end of the guide plate 39 is connected with the mounting plate 8, the other end of the guide plate 39 is connected with the connecting plate 13, and the upper and lower sides of the elastic hose 11 are provided with the guide plate 39. As shown in FIG. 9, a plurality of guide rails 391 are arranged in parallel on the guide plate 39 along the arrangement direction of the elastic hose 11, that is, the guide rail 391 is arranged along the straight segment of the transmission belt, and the guide rail 391 faces the elastic hose 11. The guide rail 391 matches with the V-shaped bearing 16 to realize auxiliary guiding and improve the accuracy of displacement of the roller 19. When the roller 19 extrudes the elastic hose 11, the elastic hose 11 will produce extrusion reaction force to push the roller 19 outward, and the V-shaped bearing 16 rolls along the guide rail 391, and at the same time, the guide rail 391 can resist the V-shaped bearing 16, so that the distance h between the upper layer and the lower layer of the pipe wall of the elastic hose 11 is kept as 2x(70%-90%)t, t is the thickness of the pipe wall of the elastic hose 11, mm. That is, as long as the elastic hose 11 has the same wall thickness, it can be installed on the equipment for filling, and a wide range of flow filling is realized. Further, the guide plate 39 and the stopper 26 are connected in space by the mounting plate 8 and the connecting plate 13, which can reduce the displacement of the two parts during the filling process to the minimum, which is beneficial to improve the accuracy of filling.

[0048] In this embodiment, at each filling, 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 transmission wheel 21 drives the first transmission belt 10, the third transmission belt 44 and the second transmission belt 27 to move in a ring shape, 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 move in a ring shape, the upper and lower rollers 19 rotate to extrude the elastic hose 11 on the straight line segment of the ring shape and move in a straight line direction, until the extrusion of the elastic hose 11 is released on the circular arc segment of the ring shape, one double-pipeline low-pulse fluid filling is completed, and the next filling is performed with the same initial extrusion position and release position, so that the repeat filling precision of the peristaltic pump is greatly improved, and the transmission pulse of the fluid is lower due to the two sets of misaligned rollers.

[0049] As shown in FIGS. 1 and 6, in this embodiment, the working principle of the low-pulse straight-line peristaltic pump is as follows: when the first group of rollers 19 on both sides of the first elastic hose 111 rotate to the straight line segment of the rotating mechanism and extrude the first elastic hose 111 by a distance L (L is 1 / 6 of the total length of the transmission belt), the first group of rollers 19 on both sides of the second elastic hose 112 also rotate to the straight line segment of the rotating mechanism and begin to extrude the second elastic hose 112. When the first group of rollers 19 on both sides of the second elastic hose 112 extrude the second elastic hose 112 by a distance L, the first group of rollers 19 on both sides of the first elastic hose 111 rotate to the circular arc segment of the rotating mechanism and begin to release the extrusion of the first elastic hose 111, the second group of rollers 19 on both sides of the first elastic hose 111 rotate to the straight line segment of the rotating mechanism and begin to extrude the first elastic hose 111. When the second group of rollers 19 on both sides of the first elastic hose 111 extrude the first elastic hose 111 by a distance L, the second group of rollers 19 on both sides of the second elastic hose 112 also rotate to the straight line segment of the rotating mechanism and begin to extrude the second elastic hose 112. When the second group of rollers 19 on both sides of the second elastic hose 112 extrude the second elastic hose 112 by a distance L, the second group of rollers 19 on both sides of the first elastic hose 111 rotate to the circular arc segment of the rotating mechanism and begin to release the extrusion of the first elastic hose 111, the third group of rollers 19 on both sides of the first elastic hose 111 rotate to the straight line segment of the rotating mechanism and begin to extrude the first elastic hose 111. When the third group of rollers 19 on both sides of the first elastic hose 111 extrude the first elastic hose 111 by a distance L, the third group of rollers 19 on both sides of the second elastic hose 112 also rotate to the straight line segment of the rotating mechanism and begin to extrude the second elastic hose 112. In this way, the first elastic hose 111 and the second elastic hose 112 are extruded in a misaligned manner, and the transmission pulse of the liquid is reduced through the double-pipeline pulse offset method with a time difference.

[0050] Although the present application is disclosed with reference to the preferred embodiments above, it is not intended to limit the present application. Any skilled person in the art, without departing from the spirit and technical solutions of the present application, can make many possible changes and modifications to the technical solutions of the present application disclosed above, or modify equivalent embodiments with equivalent changes. Therefore, any simple modification, equivalent replacement, equivalent change and modification made to the above embodiments according to the technical essence of the present application, without departing from the content of the technical solutions of the present application, still belongs to the protection scope of the technical solutions of the present application.

Claims

1. A power transmission low pulsation peristaltic pump characterized by, The mounting bracket is provided with a driving mechanism, a rotating mechanism, a roller pipe pressing assembly and a hose assembly; the hose assembly comprises a tee 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 tee joint (12) is located at two ends outside the pump body and is used for realizing confluence or separation of the first elastic hose (111) and the second elastic hose (112) in the pump body; the rotating mechanism is connected with an output end of the driving mechanism, the rotating mechanism comprises an arc segment and a straight line segment, the straight line segment of the rotating mechanism is arranged at two opposite sides of the elastic hose (11) in a horizontal direction, and a plurality of groups of the roller pipe pressing assembly are alternately and uniformly arranged on the rotating mechanism; under the driving of the driving mechanism, the rotating mechanism at the two sides of the elastic hose (11) is synchronously rotated in a ring shape to drive the roller pipe pressing assembly to synchronously rotate; when the roller pipe pressing assembly at the two sides of the first elastic hose (111) is rotated to the straight line segment of the rotating mechanism and moves linearly while extruding the first elastic hose (111) to a distance of L, the roller pipe pressing assembly at the two sides of the second elastic hose (112) is rotated to the straight line segment of the rotating mechanism and starts to extrude the second elastic hose (112); when the extruding distance of the roller pipe pressing assembly to the second elastic hose (112) reaches L, the roller pipe pressing assembly at the two sides of the first elastic hose (111) is rotated to the arc segment of the rotating mechanism, the roller pipe pressing assembly releases the first elastic hose (111), and the first elastic hose (111) starts a new round of extrusion; when the extruding distance of the first elastic hose (111) reaches L, the second elastic hose (112) starts a new round of extrusion; when the extruding distance of the second elastic hose (112) reaches L, the first elastic hose (111) starts another round of extrusion; the first elastic hose (111) and the second elastic hose (112) are cyclically and alternately extruded; the value of L is the distance between the roller pipe pressing assemblies on the rotating mechanism.

2. The power transmission low-pulsation peristaltic pump according to claim 1, characterized by, The driving mechanism comprises a driving assembly (2) and an external PLC controller; the driving assembly (2) is installed on a mounting seat (3), the mounting seat (3) is arranged on the mounting bracket, and an output end of the driving assembly (2) is connected with the rotating mechanism; the driving assembly (2) and the PLC controller are electrically connected, and the PLC controller controls the driving assembly (2) to operate.

3. The power transmission low-pulsation peristaltic pump according to claim 2, characterized by, The rotating mechanism comprises a mounting plate (8) arranged on the mounting support, 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 with the driving shaft (4), the main gear (40) is arranged on the driving shaft (4), the driven gear (5) is arranged on the first driven shaft (15), the main gear (40) is engaged with the driven gear (5) to realize the rotational connection between the driving shaft (4) and the first driven shaft (15); the transmission belt assemblies are arranged on the upper and lower sides of the elastic hose (11), and a plurality of roller pipe pressing assemblies are uniformly arranged on the transmission belt assemblies; the driving shaft (4) and the second driven shaft (20) are respectively connected with 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 with the two ends of the transmission belt assembly on the upper side of the elastic hose (11); under the driving 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), and further drive the roller pipe pressing assemblies to extrude or loosen the elastic hose (11).

4. The power transmission low-pulsation peristaltic pump according to claim 3, characterized by, 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 through 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 in the same horizontal plane; the roller pipe pressing assemblies are 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), and the roller pipe pressing assemblies rotate synchronously with the first transmission belt (10), the second transmission belt (27) and the third transmission belt (44); the roller pipe pressing assemblies between the first transmission belt (10) and the third transmission belt (44) are arranged on the opposite sides of the first elastic hose (111), the roller pipe pressing assemblies between the second transmission belt (27) and the third transmission belt (44) are arranged on the opposite sides of the second elastic hose (112), and the roller pipe pressing assemblies on the two sides of the first elastic hose (111) and the roller pipe pressing assemblies on the two sides of the second elastic hose (112) are alternately arranged to alternately extrude the two groups of elastic hoses (11).

5. The power transmission low pulsatility peristaltic pump of claim 4, wherein, The driving assembly (2) adopts a stepping motor, a servo motor or a motor driving unit; the transmission belt assembly adopts a synchronous belt transmission assembly or a chain transmission assembly.

6. The power transmission low pulsatility peristaltic pump of claim 4, wherein, The roller pipe 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 retainer (37); the roller (19) is nested on 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 fixed on the transmission belt through screws (42) respectively, and the two ends of the roller shaft (18) are nested in the V-shaped bearing (16) respectively and are fixed through the split pin (17).

7. The power transmission low-pulsation peristaltic pump according to claim 6, characterized by, One end of the driving shaft (4) and one end of the first driven shaft (15) penetrate 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) penetrate the mounting plate (8) and the second bearing mounting seat (25), and the connection parts of the driving shaft (4) and the first driven shaft (15) with the first bearing mounting seat (9) and the connection parts of the second driven shaft (20) and the third driven shaft (23) with the second bearing mounting seat (25) are respectively provided with a first deep groove ball bearing (32) and a hole elastic retainer (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 driving shaft (4), the end of the stop block (26) is provided with a parallel connecting plate (13), 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) penetrate the connecting plate (13), and the connecting parts of the driving shaft (4), the first driven shaft (15), the second driven shaft (20) and the third driven shaft (23) with the connecting plate (13) are provided with a first shaft elastic retainer (14) and a third deep groove ball bearing (36).

8. The power transmission low-pulsation peristaltic pump according to claim 7, characterized by, The inside of the stop block (26) is provided with a guide plate (39), one end of the guide plate (39) is connected with the mounting plate (8), the other end of the guide plate (39) is connected with the connecting plate (13), and the upper and lower sides of the elastic hose (11) are both provided with the guide plate (39); a plurality of guide rails (391) are arranged on the guide plate (39) in parallel along the arrangement direction of the elastic hose (11), and the guide rails (391) face the elastic hose (11), the guide rails (391) are matched with the V-shaped bearing (16) to realize guiding; when the roller (19) extrudes 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 pipe wall of the elastic hose (11) is kept as 2x(70%-90%)t, t is the pipe wall thickness of the elastic hose (11), mm.

9. The power transmission low pulsatility peristaltic pump of claim 8, wherein, The roller (19) is installed at the three-equal-position of 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 distance between the six groups of rollers (19) is 1 / 6 of the total length of the transmission belt.

10. The power transmission low pulsatility peristaltic pump of claim 8, wherein, The L is 1 / 6 of the total length of the transmission belt. The L is 1 / 6 of the total length of the transmission belt.

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