Miniature multichannel peristaltic pump

Abstract

The present application relates to the technical field of peristaltic pump, in particular to a kind of micro multi-channel peristaltic pump, including support shell, support shell is funnel-shaped structure, the side of support shell is fixedly installed with installation ring, the inner ring wall of installation ring is equipped with the extrusion groove of annular structure, drive motor is fixedly installed in support shell, the output end of drive motor is fixedly installed with adjusting disc, the outer wall of adjusting disc is inserted with several evenly distributed connecting brackets, and peristaltic roller is rotatably installed at the end of connecting bracket away from drive motor, and peristaltic roller rolls in extrusion groove.Installation ring is equipped with several installation grooves communicated with extrusion groove, and each installation groove can independently place a pump pipe, and multiple pump pipes are uniformly driven by the same group of peristaltic roller, and multiple channels can be realized synchronous parallel conveying by one pump, cost is reduced, space is saved, and the extrusion frequency and degree of each channel are completely consistent, and the flow synchronism and consistency are good.

Description

Technical Field

[0001] This invention relates to the field of peristaltic pump technology, and more particularly to a miniature multi-channel peristaltic pump. Background Technology

[0002] Peristaltic pumps deliver fluids by periodically squeezing a flexible hose with rollers. They offer advantages such as being pollution-free, highly accurate, and easy to maintain, and are widely used in fields such as biomedicine, chemical analysis, and food and beverage.

[0003] However, existing peristaltic pumps still have the following problems: 1. Most existing micro peristaltic pumps are single-channel structures, requiring multiple pumps to be connected in parallel when multiple fluids need to be transported in parallel, resulting in high cost, large space occupation, and difficulty in synchronizing the speed of each pump, leading to poor flow consistency; 2. The gap between the rollers and the extrusion wall of existing peristaltic pumps is mostly a fixed value, which can only be adapted to specific specifications of pump tubes, resulting in poor versatility; excessive extrusion pressure accelerates pump tube fatigue damage, while insufficient pressure prevents the pump tube from closing completely, leading to backflow and reduced flow accuracy. Some adjustable structures require special tools, making adjustment complex and difficult to quantify; 3. The axial friction force generated by the rolling extrusion of the rollers can easily cause the pump tube to move or even come off. Existing simple pipe clamps have limited fixing force and cannot adapt to changes in pipe diameter. During high-speed or long-term operation, the pump tube displacement is significant, leading to flow fluctuations and pumping interruptions.

[0004] Therefore, there is an urgent need to develop a miniature multi-channel peristaltic pump that features multi-channel parallel delivery, convenient pump pipe installation, precise adjustment of extrusion pressure, reliable pump pipe fixing, and stable pump body fixing. Summary of the Invention

[0005] The purpose of this invention is to solve the problems in the background art by proposing a miniature multi-channel peristaltic pump.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a miniature multi-channel peristaltic pump, comprising a support housing, the support housing having a funnel-shaped structure, an mounting ring fixedly installed on one side of the support housing, an annular extrusion groove formed on the inner ring wall of the mounting ring, a drive motor fixedly installed inside the support housing, an adjusting plate fixedly installed at the output end of the drive motor, a plurality of evenly distributed connecting brackets inserted on the outer wall of the adjusting plate, and a peristaltic roller rotatably installed at the end of the connecting bracket away from the drive motor, the peristaltic roller rolling within the extrusion groove; The outer ring wall of the mounting ring is provided with a plurality of evenly distributed mounting grooves, and the plurality of mounting grooves are connected to the extrusion grooves.

[0007] Preferably, a plurality of spring telescopic rods are symmetrically arranged in pairs on the outer wall of the mounting ring, and a plurality of arc-shaped actuating plates are provided on the outer wall of the mounting ring. The telescopic ends of the spring telescopic rods are fixedly connected to the corresponding actuating plates, and a limit cover plate is fixedly installed on the side of the actuating plate near the mounting ring. The limit cover plate is inserted into the corresponding mounting groove.

[0008] Preferably, the limiting cover plate has a plurality of expansion grooves on the side near the mounting groove, and an expansion airbag is fixedly installed in the expansion groove. A plurality of compression rods are fixedly installed on the side of the limiting cover plate near the mounting ring. The installation positions of the plurality of compression rods correspond one-to-one with the opening positions of the plurality of expansion grooves. A compression plate is fixedly installed at one end of the compression rod, and the compression plate is fixedly connected to the corresponding expansion airbag.

[0009] Preferably, a number of evenly distributed rubber balls are fixedly installed on the inner wall of the mounting groove, and the rubber balls are all hemispherical and hollow.

[0010] Preferably, an operating handle is fixedly installed on the side of the actuating plate away from the mounting ring.

[0011] Preferably, the side of the adjusting disc away from the drive motor is threaded with several adjusting bolts, and the adjusting disc has several evenly distributed adjusting slots. The positions of the adjusting slots correspond one-to-one with and are connected to several connecting brackets. A spring block is inserted into the adjusting slot. The side of the spring block near the corresponding connecting bracket has an inclined surface. One end of the adjusting bolt is rotatably connected to the spring block. The end of the connecting bracket near the spring block has an inclined surface that contacts the inclined surface on the spring block.

[0012] Preferably, the bottom of the support housing is provided with a fixed base, and a rubber suction cup is fixedly installed on the bottom of the fixed base.

[0013] Compared with existing technologies, the advantages of this invention are: several mounting slots connected to the extrusion grooves are opened on the mounting ring, each mounting slot can independently place a pump pipe, multiple pump pipes are driven by the same set of peristaltic rollers, one pump can realize multi-channel synchronous parallel delivery, reduce costs, save space, and the extrusion frequency and degree of each channel are completely consistent, with good flow synchronization and consistency.

[0014] With the cooperation of spring telescopic rod, toggle plate and limit cover plate, pulling the operating handle can pull out the limit cover plate to open the installation slot. After the pump pipe is inserted, releasing it will automatically close and fix it. There is no need to disassemble fasteners and special tools. It can be operated with one hand, which greatly shortens the installation and replacement time.

[0015] Tightening the adjusting bolt moves the spring block, converting axial movement into radial movement of the connecting bracket through the inclined surface. This precisely adjusts the extension of the peristaltic roller, i.e., the compression gap, to accommodate pump pipes of different diameters, wall thicknesses, and materials. The spring block's built-in spring provides elastic cushioning, adaptively yielding to avoid rigid impacts.

[0016] The triple-structure coordinated fixation system includes: a limiting cover plate to physically prevent detachment; an expansion airbag compressed by the squeezing rod, which then applies adaptive elastic pressure to the pump pipe via a squeezing plate; and a hollow rubber ball in the inner wall of the mounting groove that makes multiple elastic contacts with the pump pipe to increase friction. This effectively prevents axial movement and radial detachment of the pump pipe, ensuring stable flow. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the supporting shell and mounting ring in this invention; Figure 2 This is a three-dimensional structural diagram of the fixed base in this invention; Figure 3 This is a partial cross-sectional view of the supporting shell in this invention; Figure 4 This is a cross-sectional view of the mounting groove in this invention; Figure 5 This is a cross-sectional view of the limiting cover plate in this invention; Figure 6 This is a partial cross-sectional view of the adjustment disc in this invention.

[0018] In the diagram: 1. Support housing; 2. Mounting ring; 201. Extrusion groove; 101. Drive motor; 120. Adjustment disc; 102. Connecting bracket; 103. Peristaltic roller; 202. Mounting groove; 203. Spring telescopic rod; 204. Actuating plate; 205. Limiting cover plate; 206. Expansion groove; 207. Expansion airbag; 208. Extrusion moving rod; 209. Extrusion plate; 210. Rubber ball; 211. Operating handle; 121. Adjusting bolt; 122. Adjustment groove; 123. Spring pressure block; 3. Fixed base; 301. Rubber suction cup. Detailed Implementation

[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0020] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0021] Reference Figures 1-6 A miniature multi-channel peristaltic pump includes a support housing 1, which has a funnel-shaped structure. An installation ring 2 is fixedly installed on one side of the support housing 1. An annular extrusion groove 201 is formed on the inner ring wall of the installation ring 2. A drive motor 101 is fixedly installed inside the support housing 1. An adjustment plate 120 is fixedly installed at the output end of the drive motor 101. Several evenly distributed connecting brackets 102 are inserted into the outer wall of the adjustment plate 120. A peristaltic roller 103 is rotatably installed at the end of the connecting bracket 102 away from the drive motor 101. The peristaltic roller 103 rolls in the extrusion groove 201. The outer ring wall of the mounting ring 2 is provided with several evenly distributed mounting grooves 202, and the mounting grooves 202 are all connected to the extrusion grooves 201.

[0022] Several spring telescopic rods 203 are symmetrically arranged in pairs on the outer wall of the mounting ring 2. Several arc-shaped actuating plates 204 are provided on the outer wall of the mounting ring 2. The telescopic ends of the spring telescopic rods 203 are fixedly connected to the corresponding actuating plates 204. A limit cover plate 205 is fixedly installed on the side of the actuating plate 204 near the mounting ring 2. The limit cover plate 205 is inserted into the corresponding mounting groove 202.

[0023] The limiting cover plate 205 has several expansion grooves 206 on the side near the mounting groove 202. An expansion airbag 207 is fixedly installed in the expansion groove 206. Several compression rods 208 are fixedly installed on the side of the limiting cover plate 205 near the mounting ring 2. The installation positions of the compression rods 208 correspond one-to-one with the opening positions of the expansion grooves 206. A compression plate 209 is fixedly installed at one end of the compression rod 208. The compression plate 209 is fixedly connected to the corresponding expansion airbag 207.

[0024] Several evenly distributed rubber balls 210 are fixedly installed on the inner wall of the mounting groove 202. All rubber balls 210 are hemispherical and hollow.

[0025] An operating handle 211 is fixedly installed on the side of the toggle plate 204 away from the mounting ring 2.

[0026] A number of adjusting bolts 121 are threadedly connected to the side of the adjusting plate 120 away from the drive motor 101. A number of evenly distributed adjusting grooves 122 are opened inside the adjusting plate 120. The opening positions of the adjusting grooves 122 correspond one-to-one with and are connected to the connecting brackets 102. A spring block 123 is inserted into the adjusting groove 122. The side of the spring block 123 near the corresponding connecting bracket 102 has an inclined surface. One end of the adjusting bolt 121 is rotatably connected to the spring block 123. The end of the connecting bracket 102 near the spring block 123 has an inclined surface and is in contact with the inclined surface on the spring block 123.

[0027] A fixed base 3 is provided at the bottom of the supporting housing 1, and a rubber suction cup 301 is fixedly installed at the bottom of the fixed base 3.

[0028] The working principle and usage of this invention are explained in detail below: I. Pump body fixing Before use, place the miniature multi-channel peristaltic pump of this invention on a smooth and flat work surface, with the fixed base 3 at the bottom of the support housing 1 in contact with the work surface. Lightly press the top of the support housing 1, causing the rubber suction cup 301 at the bottom of the fixed base 3 to elastically deform and expel the air between it and the work surface. After releasing, the rubber suction cup 301 forms a negative pressure under its own elastic restoring force, thus firmly adhering to the work surface. The suction force of the rubber suction cup 301 effectively prevents the pump body from slipping due to vibrations caused by the operation of the drive motor 101 and the periodic squeezing of the peristaltic roller 103 during operation. Simultaneously, the rubber suction cup has excellent damping and vibration reduction effects, absorbing and attenuating vibrations generated during operation, reducing operating noise, and improving pumping stability. When it is necessary to move or disassemble the pump body, simply pry the edge of the rubber suction cup 301 with your fingers to allow air to enter between the suction cup and the work surface; the negative pressure will then disappear, easily releasing the suction fixation. The operation is convenient.

[0029] II. Pump Pipe Installation Taking the installation of four pump pipes as an example (the number of mounting slots 202 can be set to 2, 3, 4, 6 or more according to actual needs), the installation process is as follows: Open the limiting cover: Hold the operating handle 211 on one of the actuating plates 204 and pull it outward radially along the mounting ring 2. Under the pulling force, the actuating plate 204 moves outward against the retraction force of the spring telescopic rod 203, simultaneously driving the limiting cover 205 fixedly connected to the actuating plate 204 to move outward in sync, so that the limiting cover 205 is gradually pulled out of the mounting groove 202. When the limiting cover 205 is completely out of the mounting groove 202, the mounting groove 202 is in a fully open state. At this time, the spring telescopic rod 203 is in a stretched state, maintaining the retraction force on the actuating plate 204.

[0030] Placement of the pump tube: Take a flexible pump tube (usually silicone, rubber, or other elastic polymer material), and insert the middle section of the pump tube into the open mounting groove 202, so that the pump tube is embedded in the extrusion groove 201 along the circumferential direction of the mounting ring 2. Both ends of the pump tube extend from both sides of the mounting groove 202, with one end serving as a fluid inlet connected to the liquid storage container, and the other end serving as a fluid outlet connected to the target device. Since the mounting groove 202 is connected to the extrusion groove 201, the pump tube, after being inserted, naturally resides in the annular gap between the peristaltic roller 103 and the inner wall of the extrusion groove 201.

[0031] Close the limiting cover: Keeping the pump pipe position unchanged, slowly release the operating handle 211. Under the retraction force of the spring telescopic rod 203, the actuating plate 204 drives the limiting cover 205 to move radially inward, and the limiting cover 205 is reinserted into the mounting groove 202. During the insertion process, the squeezing movable rod 208 on the inner side of the limiting cover 205 first contacts the inner wall of the mounting groove 202 or the outer wall of the pump pipe. As the limiting cover 205 continues to be inserted inward, the squeezing movable rod 208 is subjected to a reaction force and retracts outward relative to the limiting cover 205 (the squeezing movable rod 208 and the limiting cover 205 are in a movable plug-in fit). The retraction of the squeezing movable rod 208 pushes the squeezing plate 209 at its end to move into the expansion groove 206, thereby compressing the expansion airbag 207 fixed in the expansion groove 206. After the inflatable airbag 207 is compressed, the internal air pressure increases, generating an elastic expansion force. This expansion force is transmitted in the opposite direction through the extrusion plate 209 and the extrusion rod 208, and acts evenly on the outer wall of the pump tube, forming an elastic adaptive compression of the pump tube.

[0032] Adaptive clamping confirmation: When the limiting cover 205 is fully inserted into the mounting groove 202, the compression of the inflatable airbag 207 reaches the design value, and the clamping force on the pump tube is within a suitable range. At this time, the hollow hemispherical rubber ball 210 on the inner wall of the mounting groove 202 contacts the outer wall of the pump tube on the other side. Under the compression of the pump tube, the rubber ball 210 undergoes elastic deformation, forming multi-point surface contact with the outer wall of the pump tube, increasing the contact area and friction. The elastic clamping force on the side of the inflatable airbag 207 and the elastic support force on the side of the rubber ball 210 work together to firmly clamp the pump tube in the mounting groove 202, which not only prevents the radial dislodgement of the pump tube, but also effectively suppresses the axial movement of the pump tube caused by the rolling compression of the peristaltic roller 103 by increasing the friction.

[0033] Multi-channel installation: Following steps 1-4 above, install the pump tubes sequentially in each of the remaining installation slots 202. Each installation slot 202 corresponds to an independent fluid channel, and the channels do not interfere with each other. After all pump tubes are installed, multiple pump tubes simultaneously surround the extrusion groove 201, positioned between the peristaltic rollers 103 and the inner wall of the extrusion groove 201, and are uniformly driven by the same set of peristaltic rollers 103.

[0034] III. Adjustment of Roller Pressure After the pump tubing is installed, adjust the pressure exerted on the pump tubing by the peristaltic roller 103 according to the tubing diameter, wall thickness, material, and required flow rate and pressure. The adjustment process is as follows: Determine the adjustment direction: Observe the closing state of the pump tube under the compression of the peristaltic roller 103. If the pump tube cannot be completely closed at the compression point (there is a gap), it indicates that the compression force is insufficient, which will lead to fluid backflow and siphon, and the compression force needs to be increased; if the pump tube is deformed too much at the compression point and there is obvious excessive bulging on both sides of the pump tube, it indicates that the compression force is too large, which will accelerate the fatigue damage of the pump tube, and the compression force needs to be reduced.

[0035] Increasing the compressive pressure: When it is necessary to increase the compressive pressure, use a screwdriver to tighten the corresponding adjusting bolt 121 (clockwise). The adjusting bolt 121 is threadedly connected to the adjusting disc 120. During the tightening process, the end of the adjusting bolt 121 pushes the spring block 123, which is rotatably connected to it, to move along the adjusting groove 122 towards the connecting bracket 102. The spring block 123 has an inclined surface on the side near the connecting bracket 102, and the connecting bracket 102 also has a matching inclined surface on the end near the spring block 123. The two inclined surfaces fit tightly together. As the spring block 123 moves towards the connecting bracket 102, the interaction force between the inclined surfaces generates a radial component force, pushing the connecting bracket 102 to extend radially outward along the adjusting disc 120. The radial extension of the connecting bracket 102 drives the peristaltic roller 103, which is rotated at its end, to move radially outward in sync, thereby reducing the gap between the peristaltic roller 103 and the inner wall of the extrusion groove 201 and increasing the degree of extrusion on the pump tube. The spring pressure block 123 is equipped with a spring (not shown in the figure) inside, which provides elastic preload during the adjustment process, so that the inclined surface always keeps in close contact, eliminates the adjustment gap, and improves the adjustment accuracy and stability.

[0036] Reduce extrusion pressure operation: When it is necessary to reduce the extrusion pressure, turn the adjusting bolt 121 in the opposite direction (counterclockwise). When the adjusting bolt 121 is turned out, it drives the spring pressure block 123 to move away from the connecting bracket 102 along the adjusting groove 122. The radial component of the force between the inclined surfaces decreases. Under the action of the elastic reaction force of the pump tube and its own return force (a return spring may be provided between the connecting bracket 102 and the adjusting plate 120, not shown in the figure), the connecting bracket 102 retracts radially inward, driving the peristaltic roller 103 to move radially inward synchronously, thereby increasing the gap between the peristaltic roller 103 and the inner wall of the extrusion groove 201, and reducing the degree of extrusion on the pump tube.

[0037] Individual Adjustment and Consistency Guarantee: Because several evenly distributed peristaltic rollers 103 (usually 3 or 4) are provided, each peristaltic roller 103 corresponds to an independent adjusting bolt 121 and spring pressure block 123. Therefore, the compression degree of each peristaltic roller 103 can be adjusted separately. During adjustment, each adjusting bolt 121 can be turned one by one to ensure that the compression degree of each peristaltic roller 103 on the pump tube is basically consistent, thereby ensuring the uniformity and stability of the flow rate during pumping and reducing flow pulsation. For multi-channel applications, since all channels share the same set of peristaltic rollers 103, the compression degree adjustment of each peristaltic roller 103 takes effect simultaneously on all channels, ensuring the consistency of compression conditions between channels.

[0038] Confirmation of Adjustment Completion: After adjustment, manually rotate the adjustment disc 120 (or jog the drive motor 101 at low speed) and observe the closure state of the pump tube as the peristaltic roller 103 rolls over it. The optimal state is when the pump tube is completely closed at the point of compression, and there is no obvious excessive bulging on both sides of the pump tube. At this point, the compression force can ensure that the pump tube is completely closed, eliminate backflow and siphon, and ensure flow accuracy, without accelerating pump tube fatigue damage due to excessive compression.

[0039] IV. Pumping Process After the pump tubing is installed and the compression level is adjusted, the peristaltic pump can be started to deliver the fluid. The working process is as follows: Start the drive motor: Connect the power supply to the drive motor 101. The output shaft of the drive motor 101 starts to rotate, driving the adjustment plate 120, which is fixedly installed at the output end, to rotate synchronously.

[0040] Roller revolution and rotation: When the adjusting plate 120 rotates, several connecting brackets 102 inserted on the outer wall of the adjusting plate 120 move in a circular motion (revolution) around the axis of the drive motor 101 along with the adjusting plate 120. The peristaltic rollers 103 at the ends of the connecting brackets 102 roll along a circular path in the extrusion groove 201. During the rolling process, the outer circumferential surface of the peristaltic roller 103 contacts the outer wall of the pump pipe and generates friction. Under the action of friction, the peristaltic roller 103 rotates around its own axis (rotation), thereby converting the sliding friction between the peristaltic roller 103 and the pump pipe into rolling friction, reducing frictional resistance and pump pipe wear, reducing operating noise, and improving the service life of the pump pipe.

[0041] Peristaltic pumping principle: As the peristaltic roller 103 rolls in a ring within the extrusion groove 201, it sequentially rolls over each pump tube surrounding the extrusion groove 201. When the peristaltic roller 103 reaches a certain position, the pump tube at that position is squeezed and closed by the peristaltic roller 103, blocking the fluid inside the pump tube. After the peristaltic roller 103 has passed, the pump tube at that position reopens under its own elastic restoring force, creating a local negative pressure (vacuum) inside the pump tube. Under atmospheric pressure, the fluid at the inlet end is drawn into the pump tube. As the peristaltic roller 103 continues to roll, the pump tubes are sequentially closed and opened, forming a "peristaltic wave" that propagates along the pump tube axis, driving the fluid inside the pump tube to flow continuously from the inlet end to the outlet end. Because multiple peristaltic rollers 103 are evenly distributed, at least one peristaltic roller 103 will close the pump pipe at any time, thereby effectively preventing fluid backflow and siphoning, and ensuring the unidirectional and continuous fluid delivery.

[0042] Multi-channel synchronous pumping: Since multiple pump tubes simultaneously encircle the extrusion groove 201, the peristaltic roller 103 extrudes all pump tubes simultaneously during its rolling process. Each peristaltic roller 103 completes one extrusion-release cycle for all channels' pump tubes after one revolution. Therefore, the pumping frequency, pumping phase, and pumping volume of each channel are completely synchronized, achieving true multi-channel synchronous parallel conveying. The flow rate of each channel is determined by the rotational speed of the drive motor 101 and the inner diameter of the pump tube: when the pump tube specifications are the same, the flow rate of each channel is completely equal; if different flow rates are required for each channel, this can be achieved by selecting pump tubes with different inner diameters (within the allowable range of extrusion).

[0043] Flow rate regulation: The flow rate of each channel can be adjusted by regulating the speed of the drive motor 101. The higher the speed of the drive motor 101, the more times the peristaltic roller 103 squeezes the pump tube per unit time, and the greater the pumping flow rate; conversely, the lower the speed, the smaller the flow rate. The drive motor 101 can be a stepper motor or a servo motor to achieve precise speed control and flow rate measurement.

[0044] Adaptive protection during operation: During pumping, if air bubbles, particulate impurities, or if the pump pipe joint passes over the peristaltic roller 103, the local resistance suddenly increases. At this time, the spring inside the spring block 123 can be further compressed, causing a slight radial retraction between the connecting bracket 102 and the peristaltic roller 103. This prevents damage to the pump pipe from rigid impacts and protects the drive motor 101 from overload damage. After the abnormal area passes, the spring block 123 automatically returns to its original position under the spring force, and the peristaltic roller 103 returns to its normal compression level.

[0045] V. Pump pipe replacement When it is necessary to replace the pump tubing (e.g., due to aging or damage, switching to a different fluid, or replacing with a pump tubing of a different specification), the procedure is as follows: Stop operation: First turn off the power to the drive motor 101 to stop the peristaltic pump, and wait for the peristaltic roller 103 to stop rotating completely.

[0046] Release the pump tube fixation: Hold the operating handle 211 on the actuating plate 204 corresponding to the pump tube to be replaced and pull it radially outward to remove the limiting cover 205 from the mounting groove 202. As the limiting cover 205 is removed, the reaction force on the squeezing movable rod 208 disappears, and the inflatable airbag 207 expands and recovers under its own elastic restoring force. The squeezing plate 209 pushes the squeezing movable rod 208 out, releasing the elastic clamping force on the pump tube. At the same time, the mounting groove 202 is fully open, and the pump tube is only in contact with the rubber ball 210.

[0047] Remove the old pump tubing: Remove the old pump tubing upwards from the mounting slot 202, disconnect both ends of the pump tubing from the storage container and the target device, and completely remove the old pump tubing.

[0048] Installing a new pump tube: Following the "Pump Tube Installation" steps described above, place the new pump tube into the installation slot 202 and close the limiting cover 205. If the specifications (diameter, wall thickness, material) of the new pump tube are different from those of the old pump tube, the compression degree of the peristaltic roller 103 needs to be readjusted according to the "Roller Compression Degree Adjustment" steps described above to adapt to the new pump tube.

[0049] Resumption of operation: After confirming that the pump pipe is securely installed and the compression is appropriate, restart the drive motor 101, and the peristaltic pump will resume normal operation.

[0050] VI. Independent and combined use of multiple channels The miniature multi-channel peristaltic pump of this invention supports flexible channel usage: Simultaneous use of all channels: When multiple fluids need to be transported simultaneously and synchronization is required, pump pipes are installed in all mounting slots 202, and all channels work simultaneously, driven by the same set of peristaltic rollers 103, with synchronized and consistent flow rates in each channel.

[0051] Partial channel usage: When the required number of channels is less than the total number of mounting slots 202, only the pump pipe needs to be installed in the required mounting slots 202, and the remaining mounting slots 202 can remain empty. The empty mounting slots 202 can still retain the limit cover 205 in the inserted state to maintain a clean appearance and prevent foreign objects from entering. Partial channel usage does not affect the normal operation of the already installed pump pipe channels.

[0052] Combination of pump tubes of different specifications: Each mounting slot 202 is independent, and pump tubes of different inner diameters can be installed in different mounting slots 202 as needed, thereby achieving multi-channel delivery of different flow rates on the same pump. Pump tubes with larger inner diameters have larger flow rates, and pump tubes with smaller inner diameters have smaller flow rates. The flow rate ratio of each channel is equal to the ratio of their cross-sectional areas (under the same rotational speed and extrusion conditions). It should be noted that since the extrusion degree of the peristaltic roller 103 is uniformly adjusted, the combination of pump tubes of different specifications should be carried out within the range where all pump tubes can obtain suitable extrusion pressure.

[0053] VII. Maintenance and Care Pump tubing should be replaced regularly: Pump tubing is a consumable part, and during long-term use, it will experience fatigue, aging, cracking, and other phenomena due to repeated compression. The condition of the pump tubing should be checked regularly according to the frequency of use and the nature of the fluid being pumped. If permanent deformation, cracks, leakage, or a significant decrease in flow rate is found, the pump tubing should be replaced immediately.

[0054] Peristaltic roller cleaning: After long-term use, fluid crystals, dust and other foreign matter may adhere to the surface of the peristaltic roller 103. The peristaltic roller 103 and the inner wall of the extrusion groove 201 should be wiped with a clean, soft cloth regularly to keep them clean and prevent foreign matter from scratching the pump pipe.

[0055] Drive motor maintenance: Drive motor 101 is a built-in sealed installation and requires no special maintenance under normal use. If it is not used for a long period of time, it should be powered on and run for a period of time periodically to prevent the internal lubricant from drying out.

[0056] Rubber suction cup inspection: Regularly check the adsorption status of rubber suction cup 301. If the suction cup is found to be aged, cracked, or has reduced adsorption force, it should be replaced in time.

[0057] To further clarify, the aforementioned fixed connection should be interpreted broadly unless otherwise explicitly specified and limited. For example, it may be welding, gluing, or integral molding, or other conventional methods well known to those skilled in the art.

[0058] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A miniature multi-channel peristaltic pump, comprising a support housing (1), characterized in that: The support housing (1) has a funnel-shaped structure. An installation ring (2) is fixedly installed on one side of the support housing (1). An extrusion groove (201) with a circular structure is opened on the inner ring wall of the installation ring (2). A drive motor (101) is fixedly installed inside the support housing (1). An adjustment plate (120) is fixedly installed at the output end of the drive motor (101). Several evenly distributed connecting brackets (102) are inserted on the outer wall of the adjustment plate (120). A peristaltic roller (103) is rotatably installed at the end of the connecting bracket (102) away from the drive motor (101). The peristaltic roller (103) rolls in the extrusion groove (201). The outer ring wall of the mounting ring (2) is provided with a number of evenly distributed mounting grooves (202), and the mounting grooves (202) are all connected to the extrusion grooves (201).

2. A miniature multi-channel peristaltic pump according to claim 1, characterized in that: The outer wall of the mounting ring (2) is equipped with a number of spring telescopic rods (203) arranged symmetrically in pairs. The outer wall of the mounting ring (2) is equipped with a number of arc-shaped actuating plates (204). The telescopic ends of the spring telescopic rods (203) are fixedly connected to the corresponding actuating plates (204). A limiting cover plate (205) is fixedly installed on the side of the actuating plate (204) close to the mounting ring (2). The limiting cover plate (205) is inserted into the corresponding mounting groove (202).

3. A miniature multi-channel peristaltic pump according to claim 2, characterized in that: The limiting cover plate (205) has several expansion grooves (206) on the side near the mounting groove (202). An expansion airbag (207) is fixedly installed in the expansion groove (206). Several compression rods (208) are fixedly installed on the side of the limiting cover plate (205) near the mounting ring (2). The installation positions of the compression rods (208) correspond one-to-one with the opening positions of the expansion grooves (206). A compression plate (209) is fixedly installed at one end of the compression rod (208). The compression plate (209) is fixedly connected to the corresponding expansion airbag (207).

4. A miniature multi-channel peristaltic pump according to claim 3, characterized in that: A number of evenly distributed rubber balls (210) are fixedly installed on the inner wall of the mounting groove (202). The rubber balls (210) are all hemispherical and hollow.

5. A miniature multi-channel peristaltic pump according to claim 4, characterized in that: An operating handle (211) is fixedly installed on the side of the actuating plate (204) away from the mounting ring (2).

6. A miniature multi-channel peristaltic pump according to claim 1, characterized in that: The adjusting disc (120) is threaded with several adjusting bolts (121) on the side away from the drive motor (101). Several evenly distributed adjusting grooves (122) are opened in the adjusting disc (120). The opening positions of the several adjusting grooves (122) correspond one-to-one with and are connected to several connecting brackets (102). A spring pressure block (123) is inserted in the adjusting groove (122). The spring pressure block (123) has an inclined surface on the side close to the corresponding connecting bracket (102). One end of the adjusting bolt (121) is rotatably connected to the spring pressure block (123). The end of the connecting bracket (102) close to the spring pressure block (123) has an inclined surface and is in contact with the inclined surface on the spring pressure block (123).

7. A miniature multi-channel peristaltic pump according to claim 1, characterized in that: The bottom of the support housing (1) is provided with a fixed base (3), and a rubber suction cup (301) is fixedly installed on the bottom of the fixed base (3).

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