Double-way concave-convex wheel rotary vertical extrusion type peristaltic pump

Abstract

The present application belongs to the technical field of peristaltic pump, and specifically discloses a double-path concave-convex wheel rotating vertical extrusion type peristaltic pump, which comprises a pump motor connecting block, a pump shell and a brushless planetary gear reduction motor; two BPT pump pipe guide grooves are arranged on the pump shell, BPT pump pipes are arranged in the BPT pump pipe guide grooves, and the upper and lower ends of the two BPT pump pipes are connected with the same hose joint; a pump top cover is fixedly installed on the top of the pump shell, limit grooves are arranged on the upper part, the middle part and the lower part of the pump shell, and the first extrusion block, the second extrusion block and the third extrusion block are respectively provided with extrusion block bearings and extrusion block cover plates; the D shaft of the brushless planetary gear reduction motor is connected with a concave-convex wheel rotating shaft, the concave-convex wheel rotating shaft is connected with a first concave-convex wheel, a second concave-convex wheel and a third concave-convex wheel through positioning keys, a front bearing is installed on the front end of the concave-convex wheel rotating shaft, a rear bearing is installed on the rear end of the concave-convex wheel rotating shaft, and a touch key block is installed on the tail end of the concave-convex wheel rotating shaft.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of peristaltic pumps, in particular to a double-path concave-convex wheel rotating vertical extrusion type peristaltic pump. BACKGROUND

[0002] A peristaltic pump is a commonly used fluid conveying device, mainly used for conveying various liquids. Compared with traditional centrifugal pumps, peristaltic pumps are widely used in flow metering conveying, small flow liquid conveying, and sample feeding and dosing of analytical instruments and equipment, and have good flow accuracy and flow stability in fluid conveying.

[0003] A common peristaltic pump uses a motor to drive a rolling wheel to alternately extrude a hose, and the hose is closed and opened by elasticity to complete the conveying of liquid. The rolling wheel is usually a stepping motor. The flow control of the common peristaltic pump generally controls the rotation angle and speed of the stepping motor, and cooperates with a reasonable hose diameter to complete the accurate control of the flow.

[0004] The applicant designed an end-face inlet double-side extrusion type peristaltic pump and applied for a Chinese patent (application number: 201910671528.4; publication number: CN110388312A). The peristaltic pump is composed of a fixed part, a rotating part and a plurality of balls. The fixed part includes a base plate, a main body and a top cover. The peristaltic pump drives the balls to rotate by the motor, and alternately extrudes the hose to complete the conveying of liquid. The hose is arranged in a hose retaining channel, which can prevent the displacement and dislocation of the hose to a certain extent.

[0005] However, the peristaltic pump has the following problems. Because the hose is always pressed by the rolling wheel, the hose can only rebound when the motor rotates. In this case, the service life of the hose is greatly reduced. As the service life of the hose is prolonged, the elasticity of the hose is attenuated, and the flow of the peristaltic pump is also attenuated, resulting in inaccurate flow or the need to frequently replace the hose to ensure the accuracy of the flow. Moreover, the peristaltic pump has a complex structure, a large number of rolling wheels, and it is difficult to ensure the consistency of each rolling wheel. The pump has a high cost and is not conducive to miniaturization. In addition, because the rolling extrusion method is used, the hose is subjected to a tangential tension, which easily causes the change of the wall thickness of the hose. As the service life of the hose is prolonged, the hose is elongated by rolling extrusion, which further affects the stability and accuracy of the flow. In addition, there are errors in the rotation angle and speed of the motor, which causes errors in the flow.

[0006] The applicant designs a double-path vertical extrusion type peristaltic pump and applies for a Chinese patent (its application number is ZL202121750117.3; its publication number is CN21544356U). The peristaltic pump is composed of a pump head, an extrusion block, a switch block, a threaded transmission head, a rubber tube, a screw, and a brushless reduction motor. The peristaltic pump drives the threaded transmission head to rotate by controlling the motor rotation, and then utilizes the rotational transmission between the threaded transmission head and the extrusion block and the switch block. At the same time, the limiting groove on the pump head allows the switch block and the extrusion block to move vertically up and down, and the transmission of fluid is completed by the alternating up-and-down movement of the switch block and the extrusion block. The peristaltic pump has a simple structure and precise single-flow control, which helps to improve the flow stability. At the same time, since the extrusion block does not extrude the rubber tube when the rubber tube is not pumping, and the vertical extrusion has no tangential tension, the service life of the rubber tube is greatly prolonged, and the cost is reduced and the miniaturization is facilitated.

[0007] However, this peristaltic pump is driven by threads, and the thread transmission efficiency is low. After long-time operation, the thread position is seriously worn due to the frequent alternation of forward and reverse rotation, and the peristaltic pump is easily jammed. Moreover, the pump has three motors, the control program is complex, and since the forward and reverse rotation of the motor is stopped by blocking each time, the torque is too large when the motor is blocked, which on the one hand easily causes the wear and jamming of the transmission thread, and on the other hand the reduction gear inside the brushless reduction motor has to bear the maximum torque when blocked each time, which seriously affects the service life of the reduction gear and thus the service life of the brushless motor. The trouble-free use cycle of this peristaltic pump is short. SUMMARY

[0008] The purpose of the present application is to provide a double-path concave-convex wheel rotating vertical extrusion type peristaltic pump to solve the problems raised in the above background.

[0009] In order to achieve the above object, the present application provides the following technical scheme: a double-way concave-convex wheel rotating vertical extrusion type peristaltic pump, comprising a pump motor connecting block, a pump shell and a brushless planetary gear reduction motor; two BPT pump pipe guide grooves are arranged on the pump shell, BPT pump pipes are arranged in the BPT pump pipe guide grooves, and the upper and lower ends of the two BPT pump pipes are connected with the same hose joint; a pump top cover is fixedly installed on the top of the pump shell; limit grooves are arranged on the upper, middle and lower parts of the pump shell, and the limit grooves are respectively used for guiding and lower limiting the vertical movement of a first extrusion block, a second extrusion block and a third extrusion block; the first extrusion block, the second extrusion block and the third extrusion block are respectively provided with an extrusion block bearing and an extrusion block cover plate; a micro switch is installed on the pump motor connecting block; the bottom of the pump motor connecting block is fixed on the upper part of the pump shell; the brushless planetary gear reduction motor is fixedly installed on the top of the pump motor connecting block; a D shaft of the brushless planetary gear reduction motor is connected with a concave-convex wheel rotating shaft; the concave-convex wheel rotating shaft is connected with a first concave-convex wheel, a second concave-convex wheel and a third concave-convex wheel through a positioning key; a front bearing is installed on the front end of the concave-convex wheel rotating shaft, a rear bearing is installed on the rear end of the concave-convex wheel rotating shaft, and a touch key block is installed on the tail end of the concave-convex wheel rotating shaft.

[0010] Preferably, the pump shell is formed by machining 7075 aluminum alloy profile, and the surface of the pump shell is subjected to black anodic oxidation treatment; the aluminum alloy is light and has high hardness.

[0011] Preferably, the two lower hose joints are liquid suction ports, and the two upper hose joints are liquid discharge ports.

[0012] Preferably, an O-ring is installed between the D shaft of the brushless planetary gear reduction motor and the concave-convex wheel rotating shaft.

[0013] Preferably, the extrusion block cover plates are connected with the first extrusion block, the second extrusion block and the third extrusion block through first screws respectively, and the extrusion block bearings are limitingly installed in the middle positions of the first extrusion block, the second extrusion block and the third extrusion block respectively.

[0014] Preferably, limit grooves for guiding and lower limiting the vertical movement of the first extrusion block, the second extrusion block and the third extrusion block are arranged on the pump shell, and bearing installation holes are arranged on the front end and the tail end of the pump shell.

[0015] Preferably, the brushless planetary gear reduction motor is fixedly connected with the pump motor connecting block through a second screw, the micro switch is fixed on the pump motor connecting block through a third screw, the pump motor connecting block is connected with the pump shell through a fourth screw, and the pump shell is connected with the pump top cover through a fifth screw.

[0016] Compared with the prior art, the present application has the following beneficial effects:

[0017] 1. The application adopts a vertical up and down extrusion mode to transport liquid. Compared with the existing peristaltic pump rotating ball extrusion mode, the BPT pump tube has no tangential rotating tension, and the BPT pump tube does not have problems such as elongation deformation. The limiting boss on the extrusion block ensures that the BPT pump tube is not excessively extruded. The wall thickness of the BPT pump tube does not change even after a long time of use, thereby greatly prolonging the service life of the BPT pump tube. In the case of power failure or non-working, the BPT pump tube is in a relaxed and uncompressed state because the extrusion block is at the lower limit. In the case of intermittent operation, the BPT pump tube is always compressed by the ball compared with the existing peristaltic pump, which greatly improves the service life of the BPT pump tube. The service life of the BPT pump tube of the same material on the double-way vertical extrusion peristaltic pump is more than 10 times that of the existing peristaltic pump, greatly improving the trouble-free working cycle of the peristaltic pump.

[0018] 2. The application adopts a design of one extrusion block controlling flow and two extrusion blocks as switches, which can ensure that the flow of the two ways is equal, and the flow error of the two ways is ±1 μL, with high precision. Compared with the existing double-way vertical extrusion peristaltic pump, the three concave-convex wheels are coaxially rotated to drive the three extrusion blocks to move up and down, and bearings are used to eliminate friction loss, thereby solving the problems of short motor life and easy wear and seizure of threaded transmission caused by frequent motor blockage in the traditional double-way vertical extrusion peristaltic pump, and short continuous trouble-free running cycle of the peristaltic pump.

[0019] 3. The application adopts a large-torque brushless planetary gear reduction motor, the service life of which can reach tens of thousands of hours, and the required torque under rated working conditions is only 10% of the rated torque, thereby greatly prolonging the service life of the reduction motor, and the trouble-free running cycle of the double-way concave-convex wheel rotating vertical extrusion peristaltic pump is much longer than that of the existing double-way vertical extrusion peristaltic pump.

[0020] 4. The application controls the working cycle by the way of the touch key block touching and pressing the microswitch, which is simple and reliable. Compared with the existing peristaltic pump controlling the flow by controlling the rotating angle of the motor, the double-way concave-convex wheel rotating vertical extrusion peristaltic pump does not have problems such as cumulative error, motor out of step and angle error, and the repeatability error of the flow transported in each cycle is ≤±1 μL, with high precision. In the fields of micro-flow transportation and analysis instrument and equipment requiring the accuracy of each liquid addition, the double-way concave-convex wheel rotating vertical extrusion peristaltic pump has incomparable advantages over the existing peristaltic pump.

[0021] 5. The present application has simple and reliable structure, small volume, the pump housing volume is only 52x45.5x60mm, can satisfy the requirement of equipment facility miniaturization. The single flow control of double-way concave-convex wheel rotation vertical extrusion type peristaltic pump can customize the flow size of each delivery by customizing the width of the second extrusion block (the width of the extrusion block determines the length of the extrusion BPT pump pipe), can accurately customize the delivery flow, compared with the existing peristaltic pump, can better meet the demand of micro flow under different working conditions, and the customized flow precision is extremely high. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is the overall structure schematic diagram of the present application;

[0023] Figure 2 It is the cross-section structure schematic diagram of A-A of the present application;

[0024] Figure 3 It is the cross-section structure schematic diagram of B-B of the present application;

[0025] Figure 4 It is the structure schematic diagram of C-C of the present application;

[0026] Figure 5 It is the structure schematic diagram of D-D of the present application

[0027] Figure 6 It is the explosion structure schematic diagram of the present application;

[0028] Figure 7 It is the working flow schematic diagram of the present application.

[0029] In the figure: 1, concave-convex wheel; 2, extrusion block; 3, concave-convex wheel; 4, extrusion block; 5, concave-convex wheel; 6, extrusion block; 7, BPT pump pipe; 8, O ring; 9, concave-convex wheel rotation shaft; 10, pump motor connecting block; 11, pump top cover; 12, pump housing; 13, touch key block; 14, positioning key; 15, rear bearing; 16, extrusion block cover plate; 17, extrusion block bearing; 18, front bearing; 19, hose joint; 20, first screw; 21, sixth screw; 22, second screw; 23, third screw; 24, fourth screw; 25, fifth screw; 26, micro switch; 27, brushless planetary gear reduction motor. EMBODIMENT

[0030] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0031] In the description of the present application, it should be noted that the terms "vertical", "upper", "lower", "horizontal" and the like indicate the orientation or positional relationship shown in the drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0032] In the description of the present application, it should be noted that unless otherwise specified and limited, the terms "set", "mount", "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0033] Please refer to Figure 1-7 The present application provides a technical scheme: a double-channel concave-convex wheel rotating vertical extrusion type peristaltic pump, comprising a pump shell 12, the pump shell 12 is machined and formed by 7075-T6 aluminum alloy profile, the surface of the pump shell 12 is treated by black anodic oxidation, the aluminum alloy material is light and has high hardness, two BPT pump pipe guide grooves are arranged on the pump shell 12, a BPT pump pipe 7 is arranged in the BPT pump pipe guide groove, and the upper and lower ends of the two BPT pump pipes 7 are connected with the same hose joint 19, the lower two hose joints 19 are liquid suction ports, and the upper two hose joints 19 are liquid discharge ports; a limiting groove of a second extrusion block 4 is arranged in the middle of the pump shell 12, a limiting groove of a first extrusion block 2 is arranged on the upper part, and a limiting groove of a third extrusion block 6 is arranged on the lower part, the three limiting grooves are used for guiding and lower limiting of vertical movement of the three extrusion blocks (the lower limiting refers to that there is a step at the bottom of the limiting groove, when the extrusion block moves downward, it stops at the step, so it is called lower limiting); bearing mounting holes are arranged at the front end and the end of the pump shell 12, four M3 countersunk through holes are arranged at the four corners of the pump shell 12, a sixth screw 21 is arranged in the countersunk through hole, which is used for fixedly connecting the pump as a whole, four M3 full thread holes are arranged on the top surface of the pump shell 12, and the pump top cover 11 is fixedly connected with the pump through four fifth screws 25 (cross disc head screws M3X18), the BPT pump pipe 7 is fixed in the guide groove of the pump shell 12 by the pump top cover 11, the pump top cover 11 is used for limiting and fixing the BPT pump pipe 7, and the upper limiting of the first extrusion block 2, the second extrusion block 4 and the third extrusion block 6.

[0034] The brushless planetary gear reduction motor 27 adopts an ultra-long life large torque motor, and the required torque under rated working condition is only 10% of the rated torque of the motor. The brushless planetary gear reduction motor 27 is connected with the pump motor connecting block 10 through 4 second screws 22 (cross countersunk head screws M3X14), the micro switch 26 is fixed on the pump motor connecting block 10 through 2 third screws 23 (cross disc head screws M2X8), and the pump motor connecting block 10 is connected with the pump shell 12 through 4 fourth screws 24 (cross disc head screws M3X14).

[0035] The concave-convex wheel rotating shaft 9 is connected with the first concave-convex wheel 1, the second concave-convex wheel 3 and the third concave-convex wheel 5 through the positioning key 14. The front end of the concave-convex wheel rotating shaft 9 is provided with the front bearing 18, the rear end is provided with the rear bearing 15, and the tail end is provided with the touch key block 13. The middle of the concave-convex wheel rotating shaft 9 is provided with a D hole, and is connected with the D shaft of the brushless planetary gear reduction motor 27. The rotation of the brushless planetary gear reduction motor 27 drives the rotation of the concave-convex wheel rotating shaft 9, so as to drive the coaxial rotation of the first concave-convex wheel 1, the second concave-convex wheel 3 and the third concave-convex wheel 5. An O-ring 8 is arranged between the D shaft of the brushless planetary gear reduction motor 27 and the concave-convex wheel rotating shaft 9. The O-ring 8 is used to fill the assembly gap and prevent the concave-convex wheel rotating shaft 9 from sliding up and down with the first concave-convex wheel 1, the second concave-convex wheel 3 and the third concave-convex wheel 5. The first extrusion block 2, the second extrusion block 4 and the third extrusion block 6 are respectively provided with an extrusion block bearing 17 and an extrusion block cover plate 16. The extrusion block cover plate 16 is connected with each extrusion block through 4 first screws 20 (cross countersunk head screws M2X5), and the extrusion block bearing 17 is positioned and installed in the middle of each extrusion block. The brushless planetary gear reduction motor 27 is fixedly connected with the pump motor connecting block 10 through the second screws 22. The micro switch 26 is fixed on the pump motor connecting block 10 through the third screws 23. The pump motor connecting block 10 is connected with the pump shell 12 through the fourth screws 24. The pump shell 12 is connected with the pump top cover 11 through the fifth screws 25.

[0036] The working principle of the double-path concave-convex wheel rotating vertical extrusion type peristaltic pump is as follows:

[0037] The double-way concave-convex cam rotating vertical extrusion peristaltic pump completes the liquid delivery from bottom to top by the alternate vertical up-and-down movement of the No. 1 extrusion block 2, the No. 2 extrusion block 4 and the No. 3 extrusion block 6 extruding the BPT pump tube 7. The No. 2 extrusion block 4 is used for the extrusion delivery of the flow path, and the No. 1 extrusion block 2 and the No. 3 extrusion block 6 are used for the opening and closing control of the flow path. The up-and-down movement of the No. 1 extrusion block 2, the No. 2 extrusion block 4 and the No. 3 extrusion block 6 is driven by the rotation of the concave-convex cam rotating shaft 9 through the D-shaped hole connection of the brushless planetary gear reduction motor 27, thereby driving the coaxial rotation of the No. 1 concave-convex cam 1, the No. 2 concave-convex cam 3 and the No. 3 concave-convex cam 5. When the No. 1 concave-convex cam 1 rotates, the up-and-down vertical movement of the No. 1 extrusion block 2 is driven by the concave position and the convex position on the No. 1 concave-convex cam 1 and the limiting groove on the pump housing 12. When the convex position of the No. 1 concave-convex cam 1 contacts the No. 1 extrusion block 2, the No. 1 extrusion block 2 moves vertically upward, and stops vertically moving after reaching the upper limit position. When the concave position of the No. 1 concave-convex cam 1 contacts the No. 1 extrusion block 2, the No. 1 extrusion block 2 moves vertically downward due to the elasticity of the BPT pump tube 7, and stops vertically moving after reaching the lower limit position. Similarly, the rotation of the No. 2 concave-convex cam 3 drives the up-and-down vertical movement of the No. 2 extrusion block 4, and the rotation of the No. 3 concave-convex cam 5 drives the up-and-down vertical movement of the No. 3 extrusion block 6. Each extrusion block is provided with an extrusion block bearing 17. When the concave-convex cam rotates and contacts the extrusion block, the rotation of the extrusion block bearing 17 completely eliminates the wear caused by hard friction, greatly prolonging the service life of the parts. At the same time, the concave-convex cam rotating shaft 9 is provided with bearings in front and back, which ensures smooth rotation and eliminates friction loss.

[0038] The brushless planetary gear reduction motor 27 rotates clockwise by 360° for one complete working cycle. The working cycle of the pump is controlled by the microswitch 26 pressed by the touch key block 13. The initial position is 0° position. At this time, the touch key block 13 presses the microswitch 26, and the microswitch 26 control loop is high level. After the motor rotates, the touch key block 13 leaves the microswitch 26, and at this time the microswitch 26 control loop is low level. When the motor rotates 360° and the touch key block 13 presses the microswitch 26 again to trigger the microswitch 26 control loop to high level, it is judged as one complete working period.

[0039] The working process of the double-way concave-convex cam rotating vertical extrusion peristaltic pump is as shown in Figure 7

[0040] The initial position is 0° position. The No. 1 extrusion block 2 and the No. 3 extrusion block 6 are at the upper limit position, i.e. high position, and the No. 2 extrusion block 4 is at the lower limit position, i.e. low position. The convex position of the No. 1 concave-convex cam 1 contacts the extrusion block bearing 17 corresponding to the No. 1 extrusion block 2. The convex position of the No. 3 concave-convex cam 5 contacts the extrusion block bearing 17 corresponding to the No. 3 extrusion block 6. The concave position of the No. 2 concave-convex cam 3 contacts the extrusion block bearing 17 corresponding to the No. 2 extrusion block 4.

[0041] ​When rotated to 34° position, the first extrusion block 2 and the second extrusion block 4 are in low position, and the third extrusion block 6 is in high position. The first extrusion block 2 contacts the extrusion block bearing 17 corresponding to the concave position of the first concave cam 1. The second extrusion block 4 contacts the extrusion block bearing 17 corresponding to the concave position of the second concave cam 3. The third extrusion block 6 contacts the extrusion block bearing 17 corresponding to the convex position of the third concave cam 5. The first extrusion block 2 is a liquid discharge switch, and the liquid discharge switch is opened at this time.

[0042] When rotated to 94° position, the first extrusion block 2 is in low position, and the second extrusion block 4 and the third extrusion block 6 are in high position. The first extrusion block 2 contacts the extrusion block bearing 17 corresponding to the concave position of the first concave cam 1. The second extrusion block 4 contacts the extrusion block bearing 17 corresponding to the convex position of the second concave cam 3. The third extrusion block 6 contacts the extrusion block bearing 17 corresponding to the convex position of the third concave cam 5. At this time, the second extrusion block 4 vertically extrudes the BPT pump pipe 7, and the liquid discharge is completed due to the incompressibility of the fluid.

[0043] When rotated to 139° position, the first extrusion block 2, the second extrusion block 4 and the third extrusion block 6 are all in high position. The first extrusion block 2 contacts the extrusion block bearing 17 corresponding to the convex position of the first concave cam 1. The second extrusion block 4 contacts the extrusion block bearing 17 corresponding to the convex position of the second concave cam 3. The third extrusion block 6 contacts the extrusion block bearing 17 corresponding to the convex position of the third concave cam 5. At this time, the first extrusion block 2 is in high position, and the liquid discharge switch is closed.

[0044] When rotated to 179° position, the first extrusion block 2 and the second extrusion block 4 are in high position, and the third extrusion block 6 is in low position. The first extrusion block 2 contacts the extrusion block bearing 17 corresponding to the convex position of the first concave cam 1. The second extrusion block 4 contacts the extrusion block bearing 17 corresponding to the convex position of the second concave cam 3. The third extrusion block 6 contacts the extrusion block bearing 17 corresponding to the concave position of the third concave cam 5. The third extrusion block 6 is a liquid suction switch, and the liquid suction switch is opened at this time.

[0045] When rotated to 225° position, the first extrusion block 2 is in high position, and the second extrusion block 4 and the third extrusion block 6 are in low position. The first extrusion block 2 contacts the extrusion block bearing 17 corresponding to the convex position of the first concave cam 1. The second extrusion block 4 contacts the extrusion block bearing 17 corresponding to the concave position of the second concave cam 3. The third extrusion block 6 contacts the extrusion block bearing 17 corresponding to the concave position of the third concave cam 5. At this time, the second extrusion block 4 vertically downwardly passes through the elastic recovery of the BPT pump pipe 7 to complete the liquid suction.

[0046] When rotating to 289° position, the first extrusion block 2 and the third extrusion block 6 are in high position, and the second extrusion block 4 is in low position, the first extrusion block 2 contacts with the extrusion block bearing 17 corresponding to the convex position of the first concave-convex cam 1; the second extrusion block 4 contacts with the extrusion block bearing 17 corresponding to the concave position of the second concave-convex cam 3; the third extrusion block 6 contacts with the extrusion block bearing 17 corresponding to the convex position of the third concave-convex cam 5; at this time, the third extrusion block 6 is in high position, and the liquid suction switch is closed;

[0047] From 289° to 360° position, the positions of the extrusion blocks are unchanged, and when the touch key block 13 again presses the micro switch 26, the extrusion pump completes a cycle of liquid discharge and suction, and when the motor continuously rotates, the extrusion pump discharges liquid first and then sucks liquid, so as to periodically complete the pulse type fluid delivery.

[0048] The single flow control of the double-path concave-convex cam rotating vertical extrusion type peristaltic pump can customize the width of the second extrusion block 4 (the width of the extrusion block determines the length of the BPT pump tube 7), so as to customize the flow size of each delivery, and combined with the appropriate pipe diameter and wall thickness of the BPT pump tube 7 (BPT rubber tube), the flow of each delivery can be accurately controlled.

[0049] It is worth noting that the whole device is controlled by the total control button, and since the control button matches the commonly used device, it belongs to the existing mature technology, and the electrical connection relationship and the specific circuit structure are not described here.

[0050] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A dual-path concave cam rotary vertical extrusion peristaltic pump, characterized in that: The invention comprises a pump motor connecting block (10), a pump housing (12) and a brushless planetary gear reduction motor (27); the pump housing (12) is provided with two BPT pump pipe guide grooves, a BPT pump pipe (7) is provided in the BPT pump pipe guide groove, and the upper and lower ends of the two BPT pump pipes (7) are connected to the same hose connector (19); a pump top cover (11) is fixedly installed on the top of the pump housing (12), and the upper, middle and lower parts of the pump housing (12) are provided with limiting grooves, and the three limiting grooves are respectively used for guiding and lower limiting the vertical movement of the first extrusion block (2), the second extrusion block (4) and the third extrusion block (6), and the first extrusion block (2), the second extrusion block (4) and the third extrusion block (6) Each is equipped with an extrusion block bearing (17) and an extrusion block cover (16); a micro switch (26) is installed on the pump motor connection block (10), the bottom of the pump motor connection block (10) is fixed to the upper part of the pump housing (12), the brushless planetary gear reduction motor (27) is fixedly installed on the top of the pump motor connection block (10), the D axis of the brushless planetary gear reduction motor (27) is connected to the concave cam rotating shaft (9), the concave cam rotating shaft (9) is connected to the first concave cam (1), the second concave cam (3) and the third concave cam (5) through the positioning key (14), the front end of the concave cam rotating shaft (9) is equipped with a front bearing (18), the rear end is equipped with a rear bearing (15), and the end is equipped with a touch key block (13); The extrusion block cover plate (16) is connected to the first extrusion block (2), the second extrusion block (4), and the third extrusion block (6) respectively through the first screw (20), and the extrusion block bearing (17) is respectively installed in the middle position of the first extrusion block (2), the second extrusion block (4), and the third extrusion block (6); The pump housing (12) is provided with limiting grooves for guiding and lower limiting the vertical movement of the No. 1 extrusion block (2), the No. 2 extrusion block (4), and the No. 3 extrusion block (6), respectively. The front end and the rear end of the pump housing (12) are both provided with bearing mounting holes.

2. A dual-path concave cam rotary vertical extrusion peristaltic pump according to claim 1, characterized in that: The pump housing (12) is formed by machining a 7075 aluminum alloy profile, and the surface of the pump housing (12) is subjected to black anodizing treatment.

3. The dual-path concave cam rotary vertical extrusion peristaltic pump according to claim 1, characterized in that: The two lower hose connectors (19) are liquid suction ports, and the two upper hose connectors (19) are liquid discharge ports.

4. The dual-path concave cam rotary vertical extrusion peristaltic pump according to claim 1, characterized in that: An O-ring (8) is installed between the D-axis of the brushless planetary gear reduction motor (27) and the concave cam rotating shaft (9).

5. The dual-path concave cam rotary vertical extrusion peristaltic pump according to claim 1, characterized in that: The brushless planetary gear reduction motor (27) is fixedly connected to the pump motor connecting block (10) via a second screw (22), the micro switch (26) is fixed to the pump motor connecting block (10) via a third screw (23), the pump motor connecting block (10) is connected to the pump housing (12) via a fourth screw (24), and the pump housing (12) is connected to the pump top cover (11) via a fifth screw (25).

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