Peristaltic pump with two radially and continuously rotating rollers

Abstract

A peristaltic pump with two radially and continuously rotating rollers. A driving mechanism, a rotating mechanism, a hose mechanism and pipe-pressing mechanisms are arranged on a mounting base plate (12). The hose mechanism comprises elastic hoses (7), cams (8) and a support plate (25), wherein the support plate (25) is separately connected to a bearing housing (1) and the cams (8), the bearing housing (1) is connected to the mounting base plate (12), and the elastic hoses (7) surround the outer peripheries of the cams (8) in a radial direction. Each pipe-pressing mechanism comprises rollers (11) and a guide assembly, wherein the guide assembly is separately connected to the rollers (11) and the rotating mechanism, and the rollers (11) are symmetrically arranged on two sides of each elastic hose (7). The rotating mechanism is connected to the driving mechanism. The rotating mechanism is driven by means of the driving mechanism to rotate, the rotating mechanism drives each guide assembly to rotate, and the rollers (11) mounted on each guide assembly rotate circumferentially in the radial direction and press each elastic hose (7), thereby achieving continuous fluid metering and delivery.

Description

Double-roller radial continuous rotation 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 "202411229585.4", and the invention name of "Double-roller radial continuous rotation peristaltic pump", and claims the priority thereof, the whole text of the Chinese patent application is incorporated herein 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 peristaltic pump, and particularly relates to a double-roller radial continuous rotation peristaltic pump.

BACKGROUND

[0004] The peristaltic pump is a liquid conveying 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 is provided with a flexible rolling roller on one side of the working hose and a relatively fixed circular arc back plate on the other side. The flexible rolling roller is used to press the hose tightly on the back plate, so as to achieve the purpose of peristaltic conveying of fluid. However, the inner wall of the hose is prone to wear and tear.

[0006] In addition, the existing peristaltic pump has a narrow range of single filling volume, which is limited. At present, there are peristaltic pumps with flow range classification of 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 and tear of the inner wall of the hose, generation of a large number of particles, fluid pollution, and narrow range of filling volume in the existing peristaltic pump. The present application provides a double-roller radial continuous rotation peristaltic pump with compact structure, convenient disassembly and assembly, high reliability, low wear and tear of the inner wall of the hose, high repeated filling precision, and wide range of single filling flow.

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

[0010] The utility model provides a kind of double-roller radial continuous rotation peristaltic pump, including installation platform, which is provided with driving mechanism, rotating mechanism, hose mechanism and pipe pressing mechanism;The hose mechanism includes elastic hose, cam and support plate, the cam includes thick wall area and thin wall area, one end of the support plate is connected with bearing seat, bearing seat is connected with installation platform, the other end of support plate is connected with cam;The pipe pressing mechanism includes roller and guide assembly, the guide assembly is connected with rotating mechanism, the roller is connected with guide assembly, the elastic hose is fixed around the outer periphery of cam along radial direction, and the roller is symmetrically arranged on the opposite sides of elastic hose;Alternatively, the cam is arranged on the side of roller, the elastic hose is fixed around the support wheel along radial direction, the support wheel is fixedly connected with support plate, and the roller is symmetrically arranged on the opposite sides of elastic hose;The rotating mechanism is installed on bearing seat and connected with the output end of driving mechanism, the rotating mechanism is rotated by the driving mechanism, the guide assembly is rotated by the rotating mechanism, the roller installed on the guide assembly rotates along radial direction, when the roller rotates to the thick wall area of cam, the roller extrudes elastic hose, when the roller rotates to the thin wall area of cam, the roller loosens elastic hose.

[0011] As a further improvement of the utility model, the driving mechanism includes driving assembly and external PLC controller;The driving assembly is installed on the installation platform, 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 utility model, the rotating mechanism includes rotating shaft, the output shaft of the driving assembly penetrates the installation platform and the bearing seat and is connected with one end of the rotating shaft, the other end of the rotating shaft is connected with the guide assembly, and the bearing seat is nested outside the rotating shaft, and the bearing seat is located between the installation platform and the guide assembly.

[0013] As a further improvement of the utility model, one end of the bearing seat is fixedly connected with the installation platform, the other end of the bearing seat is detachably connected with the end cover, the first deep groove ball bearing and the second deep groove ball bearing are sequentially nested between the bearing seat and the rotating shaft, the first deep groove ball bearing is close to the output shaft of the driving assembly, the first deep groove ball bearing and the second deep groove ball bearing are provided with a bushing, and an elastic shaft baffle is arranged between the end of the first deep groove ball bearing and the end of the rotating shaft.

[0014] As a further improvement of the utility model, the guide assembly includes left guide block and right guide block with the same structure, the left guide block and the right guide block are symmetrically arranged on both sides of the rotating shaft, and the left guide block and the right guide block are arranged in pairs on the rotating shaft, rollers are arranged on the left guide block and the right guide block, and the rollers are located on the opposite sides of the elastic hose to realize the extrusion of the elastic hose by the double rollers.

[0015] As a further improvement of the application, the left guide block and the right guide block are detachably connected with the rotating shaft through a screw rod, and a spacer is arranged between the left guide block and the rotating shaft and between the right guide block and the rotating shaft; the roller is connected with the left guide block through a roller shaft, and the roller shaft is locked and fixed with the left guide block through a nut.

[0016] As a further improvement of the application, the left guide block is provided with a third deep groove ball bearing and a pin shaft, the third deep groove ball bearing is connected with the left guide block through the pin shaft, the third deep groove ball bearing and the roller are respectively located on the two sides of the left guide block, and the third deep groove ball bearing is located in front of the roller, and the third deep groove ball bearing rotates along the edge of the cam; the right guide block is provided with a third deep groove ball bearing and a pin shaft, the third deep groove ball bearing is connected with the right guide block through the pin shaft, the third deep groove ball bearing and the roller are respectively located on the two sides of the right guide block, and the third deep groove ball bearing is located in front of the roller, and the third deep groove ball bearing rotates along the edge of the cam.

[0017] As a further improvement of the application, the ends of the two left guide blocks and the ends of the two right guide blocks are connected through a tension spring, and the tension spring is close to the third deep groove ball bearing; or, the ends of the two left guide blocks and the ends of the two right guide blocks are connected through a compression spring, and the compression spring is close to the third deep groove ball bearing.

[0018] As a further improvement of the application, the hose mechanism further comprises a first limiting block and a second limiting block, the first limiting block and the second limiting block are symmetrically arranged on the two sides of the supporting plate, so as to assist in clamping and positioning the input end and the output end of the elastic hose.

[0019] As a further improvement of the application, the cam is a circular ring structure, and the circumferential angle β of the thin-walled area of the cam is 80°±40°; the driving assembly adopts a stepping motor or a servo motor or a motor driving unit.

[0020] As a further improvement of the application, the elastic hose is two, and the two ends of the two elastic hoses are connected through a three-way joint, a plurality of groups of pipe pressing mechanisms are alternately arranged on the rotating mechanism, the rotating mechanism is driven to rotate by the driving mechanism, the rotating mechanism drives the pipe pressing mechanism to rotate, and a plurality of groups of pipe pressing mechanisms alternately dislocate and extrude the two elastic hoses, so as to realize low-pulse fluid filling. Compared with the prior art, the application has the following advantages:

[0021] The double-roller radial continuous rotation peristaltic pump of the present application is compact in structure, and comprises a driving mechanism, a rotating mechanism, a hose mechanism and a pressing mechanism arranged on a mounting platform. Specifically, the elastic hose is fixed along the radial direction by using a cam with inconsistent thickness in local areas, the rollers are symmetrically arranged on the opposite sides of the elastic hose, the rollers are connected with the rotating mechanism through a guide assembly, the rotating mechanism is connected with the output end of the driving mechanism, the rotating mechanism is rotated by the driving mechanism, the guide assembly is rotated by the rotating mechanism, and the rollers mounted on the guide assembly rotate along the radial direction. When the rollers rotate to the thick wall area of the cam, the rollers extrude the elastic hose to realize the metering delivery of the fluid. When the rollers rotate to the thin wall area of the cam, the rollers release the elastic hose, and the elastic hose can be periodically elastically restored. Since the double rollers are synchronously radially rotated to extrude the elastic hose, the shear on 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 since the initial position of the rollers is the same for each time of fluid filling, and the single transmission of the peristaltic pump is not limited by the flow range. BRIEF DESCRIPTION OF DRAWINGS

[0022] Fig. 1 is a front view of the double-roller radial continuous rotation peristaltic pump according to an embodiment of the present application.

[0023] Fig. 2 is a left view of the double-roller radial continuous rotation peristaltic pump according to an embodiment of the present application.

[0024] Fig. 3 is a structure principle schematic view of the double-roller radial continuous rotation peristaltic pump according to an embodiment of the present application.

[0025] Fig. 4 is a structure principle schematic view of the double-roller radial continuous rotation peristaltic pump according to an embodiment of the present application.

[0026] Fig. 5 is a three-dimensional axonometric projection structure principle schematic view of the double-roller radial continuous rotation peristaltic pump according to an embodiment of the present application.

[0027] Fig. 6 is a side view of the double-roller radial continuous rotation peristaltic pump according to another embodiment of the present application.

[0028] Fig. 7 is a three-dimensional axonometric projection structure principle schematic view of the double-roller radial continuous rotation peristaltic pump according to another embodiment of the present application.

[0029] Fig. 8 is a side view of the double-roller radial continuous rotation peristaltic pump according to another embodiment of the present application.

[0030] Figure 9 is a three-dimensional axonometric projection structural principle schematic view of a 3 double-roller radial continuous rotary peristaltic pump in a specific embodiment of the present application.

[0031] Legend: 1, bearing seat; 2, shaft elastic baffle; 3, first deep groove ball bearing; 4, bushing; 5, second deep groove ball bearing; 6, end cover; 7, elastic hose; 8, cam; 9, screw rod; 10, rotating shaft; 11, roller; 12, mounting platform; 13, drive assembly; 14, roller shaft; 15, left guide block; 16, nut; 18, third deep groove ball bearing; 19, pin shaft; 20, washer; 21, cotter pin; 22, tension spring; 23, right guide block; 24, first limit block; 25, support plate; 26, second limit block; 27, cushion block; 28, compression spring; 29, support wheel.

DETAILED DESCRIPTION

[0032] The present application is further described below in conjunction with the accompanying drawings and specific preferred embodiments, but the scope of protection of the present application is not limited thereby.

[0033] In the description of the present application, it should be understood that the terms "center", "thickness", "upper", "lower", "front", "back", "left", "right", "horizontal", "inner", "outer", "radial" 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 purpose of facilitating the description of 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.

[0034] In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features referred to, so that the features with "first", "second" can explicitly or implicitly include one or more of the features, and in the description of the present application, the meaning of "multiple" is two or more, unless otherwise explicitly and specifically limited.

[0035] Example 1

[0036] As shown in FIG. 1 to FIG. 5, the double-roller radial continuous rotary peristaltic pump of the present application comprises a radially arranged mounting base plate 12, which is provided with a driving mechanism, a rotating mechanism, a hose mechanism and a pipe pressing mechanism. The hose mechanism comprises an elastic hose 7, a cam 8 and a support plate 25, the cam comprises a thick wall area and a thin wall area, the support plate 25 is arranged in a horizontal direction, one end of the support plate 25 is connected with a bearing seat 1, the bearing seat 1 is connected with the mounting base plate 12, the other end of the support plate 25 is connected with the cam 8, the cam 8 is arranged in a radial direction, the mounting base plate 12 and the cam 8 are parallel to each other, and the elastic hose 7 is fixed around the outer periphery of the cam 8 in a radial direction. The pipe pressing mechanism comprises a roller 11 and a guide assembly, the guide assembly is connected with the rotating mechanism, the roller 11 is connected with the guide assembly, and the roller 11 is symmetrically arranged on opposite sides of the elastic hose 7. The rotating mechanism is installed on the bearing seat 1 and connected with the output end of the driving mechanism, the rotating mechanism is driven to rotate by the driving mechanism, the guide assembly is driven to rotate by the rotating mechanism, the roller 11 installed on the guide assembly rotates in a radial direction, when the roller 11 rotates to the thick wall area of the cam 8, the roller 11 extrudes the elastic hose 7, and when the roller 11 rotates to the thin wall area of the cam 8, the roller 11 releases the elastic hose 7.

[0037] In the embodiment, the driving mechanism, the rotating mechanism, the hose mechanism and the pipe pressing mechanism are arranged on the mounting base plate 12 to form a compact peristaltic pump body. Specifically, the cam 8 with inconsistent thickness in local areas is used to realize the radial installation and fixation of the elastic hose 7, the roller 11 is symmetrically arranged on opposite sides of the elastic hose 7, the roller 11 is connected with the rotating mechanism through the guide assembly, the rotating mechanism is connected with the output end of the driving mechanism, the rotating mechanism is driven to rotate by the driving mechanism, the guide assembly is driven to rotate by the rotating mechanism, the roller 11 installed on the guide assembly rotates in a radial direction, when the roller 11 rotates to the thick wall area of the cam 8, the roller 11 extrudes the elastic hose 7 to realize the metering and conveying of fluid, when the roller 11 rotates to the thin wall area of the cam 8, the roller 11 releases the elastic hose 7, the elastic hose 7 can periodically elastically recover, the shear of the liquid molecules and the wear of the hose can be minimized due to the synchronous radial rotation of the double rollers to extrude the elastic hose, 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 can be greatly improved since the initial position of the roller for each fluid filling is the same, and the fluid filling can be directly implemented on the equipment as long as the wall thickness of the elastic hose 7 is consistent regardless of the size of the inner diameter of the hose, thereby realizing the purpose that the single conveying of the peristaltic pump is not limited by the flow range.

[0038] As shown in FIG. 5, in the embodiment, the driving mechanism comprises a driving assembly 13 and an external PLC controller (not shown in the figure). The driving assembly 13 is installed on the mounting platform 12, and the output end of the driving assembly 13 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 13. The start-stop, forward-reverse rotation, rotation speed and flow calibration of the driving assembly are all controlled by the PLC control system and program to control the driving assembly 13, which has the advantages of simple operation and precise control. Further, the driving assembly 13 can specifically adopt a stepper motor or a servo motor or other types of motors or driving units, as long as it can drive the rotating mechanism to rotate smoothly and realize the smooth extrusion of the roller 11 on the elastic hose 7.

[0039] As shown in FIGS. 2, 3 and 4, the rotating mechanism comprises a rotating shaft 10, the output shaft of the driving assembly 13 penetrates the mounting platform 12 and is connected with one end of the rotating shaft 10, the output shaft of the driving assembly 13 is nested inside the end of the rotating shaft 10, the other end of the rotating shaft 10 is connected with the guide assembly, and the bearing seat 1 is nested on the outer periphery of the rotating shaft 10, and the bearing seat 1 is located between the mounting platform 12 and the guide assembly.

[0040] As shown in FIGS. 3 and 4, one end of the bearing seat 1 is connected and fixed with the mounting platform 12, the other end of the bearing seat 1 is detachably connected with the end cover 6, the first deep groove ball bearing 3 and the second deep groove ball bearing 5 are nested between the bearing seat 1 and the rotating shaft 10 in sequence, the first deep groove ball bearing 3 is close to the output shaft of the driving assembly 13, the second deep groove ball bearing 5 is close to the guide assembly, and the first deep groove ball bearing 3 and the second deep groove ball bearing 5 are provided with the bushing 4, so as to improve the stability of transmission. The shaft elastic retainer 2 is arranged between the end of the first deep groove ball bearing 3 and the end of the rotating shaft 10, so as to prevent the first deep groove ball bearing 3 from sliding off from the outside of the rotating shaft 10.

[0041] As shown in FIGS. 1, 2 and 5, the guide assembly comprises left guide blocks 15 and right guide blocks 23 which are the same in structure, the left guide blocks 15 and the right guide blocks 23 are symmetrically arranged on both sides of the rotating shaft 10, and the left guide blocks 15 and the right guide blocks 23 are arranged in pairs on the rotating shaft 10, the roller 11 is arranged on each of the left guide blocks 15 and the right guide blocks 23, and the roller 11 is located on the opposite sides of the elastic hose 7, that is, two groups of double rollers are arranged on the rotating shaft 10, so as to realize the extrusion of the elastic hose 7 by the double rollers and complete the continuous metering delivery of the fluid.

[0042] As shown in Figure 1, the left guide block 15 and the right guide block 23 are detachably connected with the rotating shaft 10 through the screw rod 9, and the left guide block 15 and the rotating shaft 10 and the right guide block 23 and the rotating shaft 10 are both provided with the gasket 27 to provide flexible buffering and avoid direct rigid connection between the guide block and the rotating shaft 10 to generate abrasion. The roller 11 is connected with the left guide block 15 through the roller shaft 14, the roller shaft 14 penetrates the roller 11 and the left guide block 15 in sequence, and the roller shaft 14 is locked and fixed with the left guide block 15 through the nut 16, that is, the detachable connection and fixation of the roller 11 and the left guide block 15 is realized. The connection between the roller 11 and the right guide block 23 is also based on the same principle.

[0043] As shown in Figure 1, the left guide block 15 is provided with the third deep groove ball bearing 18 and the pin shaft 19. The third deep groove ball bearing 18 is connected with the left guide block 15 through the pin shaft 19, the pin shaft 19 penetrates the third deep groove ball bearing 18 and the left guide block 15 in sequence, and is locked and fixed with the left guide block 15 through the split pin 21, and the gasket 20 is arranged between the third deep groove ball bearing 18 and the left guide block 15 to provide flexible buffering and ensure smooth rotation of the third deep groove ball bearing 18. The third deep groove ball bearing 18 and the roller 11 are respectively located on both sides of the left guide block 15, when the peristaltic pump operates, the third deep groove ball bearing 18 is located in front of the roller 11, and the third deep groove ball bearing 18 rotates along the edge of the cam 8 to assist the positioning of the left guide block 15 and improve the accuracy of the roller 11 in extruding the elastic hose 7. The right guide block 23 is provided with the third deep groove ball bearing 18 and the pin shaft 19, the third deep groove ball bearing 18 is connected with the right guide block 23 through the pin shaft 19, the pin shaft 19 penetrates the third deep groove ball bearing 18 and the right guide block 23 in sequence, and is locked and fixed with the left guide block 15 through the split pin 21, and the gasket 20 is arranged between the third deep groove ball bearing 18 and the right guide block 23. The third deep groove ball bearing 18 and the roller 11 are respectively located on both sides of the right guide block 23, when the peristaltic pump operates, the third deep groove ball bearing 18 rotates along the edge of the cam 8 to assist the positioning of the right guide block 23 and improve the accuracy of the roller 11 in extruding the elastic hose 7.

[0044] During the operation of the peristaltic pump, under the action of the tension spring 22, the third deep groove ball bearing 18 extrudes the cam 8 or is separated from the extrusion of the cam 8, the rotating shaft 10 drives the left guide block 15 and the right guide block 23 to rotate with the screw rod 9 as the rotating center, and realizes the radial rotation extrusion or separation of the elastic hose 7 by the double rollers.

[0045] As shown in Figure 1, the ends of the two left guide blocks 15 and the ends of the two right guide blocks 23 are connected through the tension spring 22, and the tension spring 22 is close to the third deep groove ball bearing 18.

[0046] As shown in FIG. 1 and FIG. 5, the hose mechanism further comprises a first limiting block 24 and a second limiting block 26 symmetrically arranged on both sides of the support plate 25 for assisting in clamping and positioning the input end and the output end of the elastic hose 7. Through the cooperation of the support plate 25, the first limiting block 24, the second limiting block 26 and the cam 8, the positioning and clamping of the elastic hose 7 are realized, and the movement during the filling process is prevented.

[0047] As shown in FIG. 1, in this embodiment, the cam 8 is a circular ring structure, and the circumferential angle β of the thin-walled region of the cam 8 is about 80°, so the circumferential angle of the thin-walled region of the cam 8 is about 280°. The initial position and the end position of the elastic hose 7 being extruded each time are the same, which can realize high-precision continuous filling from the initial position, and greatly improve the repeat filling precision of the peristaltic pump. Moreover, as long as the wall thickness of the elastic hose 7 is the same, the elastic hose 7 can be installed on the device for filling, and a wide range of flow filling can be realized.

[0048] The working principle of the peristaltic pump of this embodiment is as follows:

[0049] During each filling, the rotating shaft 10 rotates to drive the left guide block 15 and the right guide block 23 to rotate. The third deep groove ball bearing 18 installed on the left guide block 15 and the right guide block 23 extrudes the cam 8 when reaching the thick-walled region of the 280° circumferential segment of the cam 8 during rotation. When the third deep groove ball bearing 18 reaches the thin-walled region of the 80° circumferential segment of the cam 8 during rotation, the third deep groove ball bearing 18 is separated from the cam 8 under the action of the tension spring 22. When the third deep groove ball bearing 18 extrudes the cam 8, the left guide block 15 and the right guide block 23 rotate around the screw rod 9 as the center, and drive the double rollers to rotate and extrude the elastic hose 7 from both sides. When the third deep groove ball bearing 18 is separated from the extrusion of the cam 8, the left guide block 15 and the right guide block 23 rotate around the screw rod 9 under the tension of the tension spring 22, and drive the double rollers to separate from the extrusion of the elastic hose 7 from both sides. Through the rotation and extrusion of the two groups of double rollers, the continuous filling of the fluid is realized.

[0050] In this embodiment, the flexible roller 11 is symmetrically arranged on both sides of the elastic hose 7, and the double rollers rotate radially in succession. The purpose of extruding or separating the elastic hose 7 is realized through the thickness change of the cam 8 in the circumferential direction, and there is no relative motion between the roller 11 and the elastic hose 7, which can greatly reduce the wear of the inner wall of the elastic hose 7. As long as the wall thickness of the clamped elastic hose 7 is consistent, the fluid filling can be directly implemented on the device regardless of the size of the inner diameter of the elastic hose 7, which achieves the purpose of not being limited by the flow range for the peristaltic pump fluid filling.

[0051] Embodiment 2

[0052] As shown in FIG. 6 and FIG. 7, the double-roller radial continuous rotary peristaltic pump of the present application has similar structure and working principle as the double-roller radial continuous rotary peristaltic pump in Embodiment 1, the difference mainly lies in that:

[0053] Two cams 8 are arranged on the outer sides of the two rollers 11 respectively, the elastic hose 7 is fixed on the annular support wheel 29 in radial direction, the support wheel 29 is fixed with the support plate 25, and the rollers 11 are symmetrically arranged on the opposite sides of the elastic hose 7. At this time, the cam 8 and the elastic hose 7 are arranged on the two sides of the roller 11 respectively.

[0054] Further, when the cam 8 is arranged on the outer side of the roller 11, the ends of the two left guide blocks 15 and the ends of the two right guide blocks 23 are connected by the compression spring 28, and the compression spring 28 is close to the third deep groove ball bearing 18. During the material filling process, when the roller 11 rotates to the thick wall area of the cam 8, the compression spring 28 is in a compressed state, and the roller 11 rotates while extruding the elastic hose 7; when the roller 11 rotates to the thin wall area of the cam 8, the compression spring 28 is in the original position, and the roller 11 rotates while loosening the elastic hose 7.

[0055] Embodiment 3

[0056] As shown in FIG. 8 and FIG. 9, the double-roller radial continuous rotary peristaltic pump of the present application has similar structure and working principle as the double-roller radial continuous rotary peristaltic pump in Embodiment 1, the difference mainly lies in that:

[0057] The elastic hose 7 is arranged in parallel in two, and the two ends of the two elastic hoses 7 are connected by a three-way joint (not shown in the figure) to realize confluence and separation. A plurality of pipe pressing mechanisms are alternately arranged on the rotating mechanism, the rotating mechanism is driven to rotate by the driving mechanism, the rotating mechanism drives the pipe pressing mechanisms to rotate, and the plurality of pipe pressing mechanisms alternately and staggeredly extrude the two elastic hoses 7 to realize low pulsation fluid filling.

[0058] Further, as shown in FIG. 8, two cams 8 are arranged in front of and behind each other on the rotating shaft 10, the elastic hose 7 is arranged around each cam 8, a plurality of roller groups 11 are arranged in front of and behind each other on the rotating shaft 10 correspondingly, and the roller groups outside the two elastic hoses 7 are alternately arranged. During the operation of the peristaltic pump, when the rollers 11 on both sides of one of the elastic hoses 7 extrude the elastic hose 7 and rotate and displace a certain distance, the rollers 11 on both sides of the other elastic hose 7 begin to extrude the elastic hose 7 to realize the alternately and staggeredly extruding the two elastic hoses 7.

[0059] 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 dual-roller radially continuous peristaltic pump, characterized in that, The installation platform (12) is provided with a driving mechanism, a rotating mechanism, a hose mechanism and a pipe pressing mechanism; the hose mechanism comprises an elastic hose (7), a cam (8) and a support plate (25), the cam (8) comprises a thick wall area and a thin wall area, one end of the support plate (25) is connected with a bearing seat (1), the bearing seat (1) is connected with the installation platform (12), and the other end of the support plate (25) is connected with the cam (8); the pipe pressing mechanism comprises a roller (11) and a guide assembly, the guide assembly is connected with the rotating mechanism, the roller (11) is connected with the guide assembly, the elastic hose (7) is fixed around the outer periphery of the cam (8) in the radial direction, and the rollers (11) are symmetrically arranged on the opposite sides of the elastic hose (7); or the cam (8) is arranged on the side of the roller (11), the elastic hose (7) is fixed around the support wheel (29) in the radial direction, the support wheel (29) is connected with the support plate (25) and fixed, and the rollers (11) are symmetrically arranged on the opposite sides of the elastic hose (7); the rotating mechanism is installed on the bearing seat (1) and connected with the output end of the driving mechanism, the rotating mechanism is driven to rotate by the driving mechanism, the guide assembly is driven to rotate by the rotating mechanism, the roller (11) installed on the guide assembly rotates in the radial direction, when the roller (11) rotates to the thick wall area of the cam (8), the roller (11) extrudes the elastic hose (7), and when the roller (11) rotates to the thin wall area of the cam (8), the roller (11) releases the elastic hose (7).

2. The dual-roller radially continuous peristaltic pump of claim 1, wherein, The driving mechanism comprises a driving assembly (13) and an external PLC controller; the driving assembly (13) is installed on the installation platform (12), and the output end of the driving assembly (13) is connected with the rotating mechanism; the driving assembly (13) and the PLC controller are electrically connected, and the PLC controller controls the driving assembly (13) to operate.

3. The dual-roller radially continuous peristaltic pump of claim 2, wherein, The rotating mechanism comprises a rotating shaft (10), the output shaft of the driving assembly (13) penetrates the installation platform (12) and the bearing seat (1) and is connected with one end of the rotating shaft (10), the other end of the rotating shaft (10) is connected with the guide assembly, and the bearing seat (1) is nested on the outer periphery of the rotating shaft (10) and located between the installation platform (12) and the guide assembly.

4. The dual-roller radially continuous peristaltic pump of claim 3, wherein, One end of the bearing seat (1) is fixedly connected with the installation platform (12), the other end of the bearing seat (1) is detachably connected with an end cover (6), first deep groove ball bearings (3) and second deep groove ball bearings (5) are sequentially nested between the bearing seat (1) and the rotating shaft (10), the first deep groove ball bearings (3) are close to the output shaft of the driving assembly (13), the first deep groove ball bearings (3) and the second deep groove ball bearings (5) are provided with a bushing (4), and an elastic shaft collar (2) is arranged between the end of the first deep groove ball bearings (3) and the end of the rotating shaft (10).

5. The dual-roller radially continuous peristaltic pump of claim 4, wherein, The guide assembly comprises left guide blocks (15) and right guide blocks (23) which are structurally identical, the left guide blocks (15) and the right guide blocks (23) are symmetrically arranged on the two sides of the rotating shaft (10), and the left guide blocks (15) and the right guide blocks (23) are arranged in pairs on the rotating shaft (10), the left guide blocks (15) and the right guide blocks (23) are provided with rollers (11), and the rollers (11) are located on the opposite sides of the elastic hose (7) to realize double-roller extrusion of the elastic hose (7).

6. The dual-roller radially continuous peristaltic pump of claim 5, wherein, The left guide blocks (15) and the right guide blocks (23) are detachably connected with the rotating shaft (10) through the screw rods (9), and the left guide blocks (15) and the right guide blocks (23) are provided with spacers (27) between the left guide blocks (15) and the rotating shaft (10) and between the right guide blocks (23) and the rotating shaft (10); the rollers (11) are connected with the left guide blocks (15) through roller shafts (14), and the roller shafts (14) are locked and fixed with the left guide blocks (15) through nuts (16).

7. The dual-roller radially continuous peristaltic pump of claim 5, wherein, The left guide blocks (15) are provided with third deep groove ball bearings (18) and pin shafts (19), the third deep groove ball bearings (18) are connected with the left guide blocks (15) through the pin shafts (19), the third deep groove ball bearings (18) and the rollers (11) are located on the two sides of the left guide blocks (15) respectively, the third deep groove ball bearings (18) are located in front of the rollers (11), and the third deep groove ball bearings (18) rotate along the edges of the cams (8); the right guide blocks (23) are provided with third deep groove ball bearings (18) and pin shafts (19), the third deep groove ball bearings (18) are connected with the right guide blocks (23) through the pin shafts (19), the third deep groove ball bearings (18) and the rollers (11) are located on the two sides of the right guide blocks (23) respectively, the third deep groove ball bearings (18) are located in front of the rollers (11), and the third deep groove ball bearings (18) rotate along the edges of the cams (8); the ends of the two left guide blocks (15) and the ends of the two right guide blocks (23) are connected through stretching springs (22), and the stretching springs (22) are close to the third deep groove ball bearings (18); Alternatively, the ends of the two left guide blocks (15) and the ends of the two right guide blocks (23) are connected through compression springs (28), and the compression springs (28) are close to the third deep groove ball bearings (18).

8. The dual-roller radially continuous peristaltic pump according to any one of claims 1 to 7, wherein, The hose mechanism further comprises first limiting blocks (24) and second limiting blocks (26), the first limiting blocks (24) and the second limiting blocks (26) are symmetrically arranged on the two sides of the supporting plate (25) to assist in clamping and positioning the input end and the output end of the elastic hose (7).

9. The dual-roller radially continuous peristaltic pump according to any one of claims 2 to 7, wherein, The cam (8) is a circular ring structure, the circumferential angle β of the thin-walled region of the cam (8) is 80°±40°, and the driving assembly (13) adopts a stepping motor, a servo motor or a motor driving unit.

10. The dual-roller radially continuous peristaltic pump according to any one of claims 1 to 7, wherein, The elastic hose (7) is two, and the two ends of the two elastic hoses (7) are connected through a three-way joint, a plurality of groups of pipe pressing mechanisms are alternately arranged on the rotating mechanism, the rotating mechanism is driven to rotate by the driving mechanism, the rotating mechanism drives the pipe pressing mechanism to rotate, and the plurality of groups of pipe pressing mechanisms alternately dislocate and extrude the two elastic hoses (7), so that low pulsation fluid filling is realized.

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