Microfluidic injection pump

Abstract

This invention discloses a microfluidic injection pump, comprising: a base, a transmission mechanism, and a universal fixing mechanism; a touch screen is mounted on the base for controlling the use of the microfluidic injection pump; the transmission mechanism includes a drive component and an injection pusher, the injection pusher being mounted on the drive component, and the drive component driving the injection pusher to move horizontally, thus moving the syringe piston rod; the universal fixing mechanism includes an upper positioning seat and a lower positioning seat. This invention can securely fix syringes of any size and shape without causing any damage or deformation, effectively avoiding reduced accuracy of the microfluidic injection pump due to syringe shaking or damage / deformation. Furthermore, it can automatically fix multiple sets of syringes of different sizes and shapes without requiring excessive manual operation, saving time and effort and improving the efficiency of the microfluidic injection pump.

Description

Technical Field

[0001] This invention relates to the field of microfluidics, and in particular to a microfluidic injection pump. Background Technology

[0002] In recent years, microfluidics technology has been recognized as having enormous development potential and broad application prospects in biomedical research.

[0003] Microfluidic syringe pumps are common instruments in life science research used for long-term, uniform micro-injection. Proper use in experiments can significantly reduce the workload of staff while accurately controlling the dosage of various reagents. In microfluidic systems, syringe pumps are frequently used as the driving force for fluid to enter or exit the microfluidic channel.

[0004] Currently, microfluidic syringe pumps primarily achieve accurate control of reagent dosage by precisely controlling the movement of the syringe plunger. Each microfluidic syringe pump needs to be able to use syringes of any size from any manufacturer.

[0005] In practical use, although most syringes can be secured by the clamps mounted on the injection pump, the clamps cannot apply excessive force to the syringes, otherwise the syringes will deform. If the clamping force is too weak, the syringes will easily wobble. Both of these factors affect the control accuracy of the fluid reagents. Therefore, it is difficult for the clamps on the injection pump to securely fix syringes of different sizes, especially when encountering syringes that are too thin, too thick, or irregularly shaped. This makes it difficult to securely fix the syringes, which greatly reduces the accuracy of the microfluidic injection pump. In addition, fixing the syringes requires manual operation, which is time-consuming and laborious when fixing multiple sets of syringes, greatly reducing the efficiency of the microfluidic injection pump.

[0006] Therefore, it is necessary to provide a microfluidic injection pump to address the aforementioned technical problems. Summary of the Invention

[0007] The purpose of this invention is to provide a microfluidic injection pump that can solve the problem of difficulty in securing syringes of different sizes, which greatly reduces the accuracy and efficiency of microfluidic injection pumps.

[0008] To achieve the above objectives, embodiments of the present invention provide a microfluidic injection pump, comprising: a base, a transmission mechanism, and a universal fixing mechanism;

[0009] A touch screen is mounted on the base, which is used to control the use of the microfluidic injection pump;

[0010] The transmission mechanism includes a drive assembly and an injection pusher. The injection pusher is mounted on the drive assembly, and the drive assembly can drive the injection pusher to move horizontally and push the syringe piston rod to move.

[0011] The universal fixing mechanism includes an upper positioning seat and a lower positioning seat, the upper positioning seat being located above the lower positioning seat, and a lifting adjustment structure being provided between the upper positioning seat and the lower positioning seat;

[0012] The upper positioning seat is also equipped with an inflation expansion and clamping assembly, which can expand and deform arbitrarily to clamp and fix syringes of different shapes and sizes. The lower positioning seat is also equipped with a negative pressure adsorption positioning assembly, which is used to pre-position and fix the syringe.

[0013] In one or more embodiments of the present invention, the driving assembly includes a fixed base, a drive motor, a translation screw, and a horizontal slide bar. The fixed base is fixedly connected to the top of the base. Multiple sets of the drive motor are mounted on the fixed base. One end of the translation screw is fixedly connected to the output end of the drive motor. The injection pusher is threadedly connected to the translation screw. Multiple sets of the horizontal slide bar are fixedly connected to the fixed base. One end of the horizontal slide bar passes through the injection pusher, and the injection pusher is slidably connected on the horizontal slide bar.

[0014] In one or more embodiments of the present invention, a limiting groove is formed on the injection pusher.

[0015] In one or more embodiments of the present invention, the lifting adjustment structure includes a lifting screw and a vertical slide rod. The bottom end of the lifting screw is rotatably connected to the lower positioning seat, and the top end of the lifting screw passes through the upper positioning seat. The lifting screw is threadedly connected to the upper positioning seat. Multiple sets of vertical slide rods are fixedly connected to the lower positioning seat. The top end of the vertical slide rod passes through the upper positioning seat, and the vertical slide rod is slidably connected to the upper positioning seat.

[0016] In one or more embodiments of the present invention, a knob is fixedly connected to the top end of the lifting screw.

[0017] In one or more embodiments of the present invention, the inflatable expansion and compression assembly includes an inflation port and a compression airbag. Multiple sets of inflation ports are provided at the bottom of the upper positioning seat. The compression airbag is fixedly connected to the bottom end of the inflation port. An inflation pipeline is fixedly connected to one side of the upper positioning seat, and an air pump is fixedly connected to one end of the inflation pipeline.

[0018] In one or more embodiments of the present invention, a first pressure sensor is fixedly connected inside the upper positioning seat.

[0019] In one or more embodiments of the present invention, the negative pressure adsorption positioning component includes a placement groove, an adsorption airbag, and an air extraction port. The placement groove has multiple sets of openings on the lower positioning seat. The adsorption airbag is fixedly connected to the inside of the placement groove. The adsorption airbag has multiple sets of adsorption holes. The air extraction port is opened inside the placement groove and is used to connect the lower positioning seat and the inside of the adsorption airbag. An air extraction pipe is fixedly connected to one side of the lower positioning seat. One end of the air extraction pipe is fixedly connected to the input end of an air pump.

[0020] In one or more embodiments of the present invention, a branch pipe is fixedly connected to the air extraction pipeline, and a solenoid valve is installed on the branch pipe.

[0021] In one or more embodiments of the present invention, a second pressure sensor is fixedly connected inside the lower positioning seat.

[0022] Compared with the prior art, the embodiments of the present invention have the following technical effects:

[0023] This invention can securely fix syringes of any size and shape without causing any damage or deformation. It effectively avoids the reduction in the accuracy of microfluidic injection pumps caused by syringe shaking, damage, or deformation. At the same time, it can automatically fix multiple sets of syringes of different sizes and shapes without requiring excessive manual operation, saving time and effort and improving the efficiency of microfluidic injection pumps. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of a microfluidic injection pump according to an embodiment of the present invention;

[0025] Figure 2 This is a schematic diagram of the upper and lower positioning seats of a microfluidic injection pump according to an embodiment of the present invention;

[0026] Figure 3 This is a side view of the upper and lower positioning seats of a microfluidic injection pump according to an embodiment of the present invention;

[0027] Figure 4 This is a test diagram of a microfluidic injection pump according to an embodiment of the present invention, showing the upper positioning seat and the lower positioning rear view.

[0028] Figure 5 This is a microfluidic injection pump according to an embodiment of the present invention. Figure 2 Enlarged view of point A in the middle;

[0029] Figure 6 This is a diagram of a microfluidic injection pump control system according to an embodiment of the present invention.

[0030] Explanation of key figure labels:

[0031] 1. Base; 2. Touch screen; 3. Fixed seat; 4. Driving motor; 5. Translation screw rod; 6. Horizontal sliding rod; 7. Injection push block; 701. Limiting groove; 8. Upper positioning seat; 801. Inflation port; 802. Compression airbag; 803. First pressure sensor; 804. First pressure relief valve; 9. Lower positioning seat; 901. Placing groove; 902. Adsorption airbag; 9021. Adsorption hole; 903. Second pressure sensor; 904. Air extraction port; 905. Second pressure relief valve; 10. Lifting screw rod; 1001. Knob; 11. Vertical sliding rod; 12. Air pump; 13. Inflation pipeline; 1301. Check valve; 14. Air extraction pipeline; 1401. Branch pipe; 1402. Solenoid valve. Specific embodiments

[0032] The following combines the drawings to describe in detail the specific embodiments of the present invention, but it should be understood that the protection scope of the present invention is not limited by the specific embodiments.

[0033] Unless otherwise clearly stated, throughout the specification and claims, the term "comprising" or its variations such as "including" or "having" etc. will be understood to include the stated elements or components, without excluding other elements or other components.

[0034] As Figures 1 to 6 shown, a microfluidic injection pump according to a preferred embodiment of the present invention includes: a base 1, a transmission mechanism and a general-purpose fixing mechanism. A touch screen 2 is installed on the base 1, and the touch screen 2 is used to control the use of the microfluidic injection pump and display relevant parameters, such as parameters like flow rate, pressure, time, etc. Among them, the touch screen 2 is also connected to an Internet of Things control module. Through the cooperation of the touch screen 2 and the Internet of Things control module, the microfluidic injection pump can accurately adjust the flow rate and flow volume.

[0035] As Figure 1 shown, the transmission mechanism includes a driving component and an injection push block 7. Among them, the driving component includes a fixed seat 3, a driving motor 4, a translation screw rod 5 and a horizontal sliding rod 6. The fixed seat 3 is fixedly connected to the top of the base 1, and two groups of driving motors 4 are installed on the fixed seat 3. The two groups of driving motors 4 are both wirelessly connected to the Internet of Things control module, and the operation of the driving motors 4 is controlled through the Internet of Things control module.

[0036] One end of the translation screw rod 5 is fixedly connected to the output end of the driving motor 4 through a coupling, and the driving motor 4 can drive the translation screw rod 5 to rotate. A threaded hole matching the translation screw rod 5 is opened on the injection push block z, and one end of the translation screw rod 5 penetrates through the threaded hole. The injection push block 7 is threadedly connected to the translation screw rod 5 through the threaded hole, and during the rotation of the translation screw rod 5, the injection push block 7 can be driven to move through the thread.

[0037] There are four groups of horizontal sliding rods 6 fixedly connected to the fixed seat 3. Each injection push block 7 is also provided with two through holes that match the two horizontal sliding rods 6. One end of the horizontal sliding rod 6 penetrates through the through hole on the injection push block 7, and the injection push block 7 is slidably connected to the horizontal sliding rod 6. When the translation screw rod 5 drives the injection push block 7 to move, the horizontal sliding rod 6 will limit and guide the movement of the injection push block 7, enabling the injection push block 7 to move smoothly horizontally.

[0038] Specifically, referring Figure 1 and Figure 6 As shown, the Internet of Things control module controls the output power and start / stop of the drive motor 4. By controlling the output power and start / stop of the drive motor 4, the rotation speed and rotation stroke of the translation screw rod 5 can be controlled, thereby being able to control the movement speed and movement stroke of the injection push block 7 driven by the translation screw rod 5 through the thread. Furthermore, the movement of the syringe piston rod can be precisely controlled through the injection push block 7 to precisely control the inflow and outflow of the fluid.

[0039] Referring Figure 1 As shown, a limiting groove 701 is provided on the injection push block 7. Through the limiting groove 701, the end of the piston rod can be limited, facilitating the smooth pushing and pulling of the piston rod by the injection push block 7.

[0040] Referring Figures 2-4 As shown, the universal fixing mechanism includes an upper positioning seat 8 and a lower positioning seat 9. The upper positioning seat 8 is located above the lower positioning seat 9, and a lifting and adjusting structure is provided between the upper positioning seat 8 and the lower positioning seat 9. Through the lifting and adjusting structure, the upper positioning seat 8 can be lifted and lowered flexibly.

[0041] Among them, the lifting and adjusting structure includes a lifting screw rod 10 for driving the upper positioning seat 8 to lift and lower and a vertical sliding rod 11 for guiding and limiting the lifting of the upper positioning seat 8. The bottom end of the lifting screw rod 10 is rotatably connected to the lower positioning seat 9. A threaded hole matching the lifting screw rod 10 is provided on the upper positioning seat 8. The top end of the lifting screw rod 10 penetrates through the threaded hole on the upper positioning seat 8, and the upper positioning seat 8 is threadedly connected to the lifting screw rod 10 through the threaded hole. Rotating the lifting screw rod 10 can drive the upper positioning seat 8 to lift and lower.

[0042] There are two groups of vertical sliding rods 11 fixedly connected to the lower positioning seat 9. Through holes matching the vertical sliding rods 11 are provided on the upper positioning seat 8. The top end of the vertical sliding rod 11 penetrates through the through hole on the upper positioning seat 8, and the upper positioning seat 8 is slidably connected to the two vertical sliding rods 11 through the through hole. When the lifting screw rod 10 drives the upper positioning seat 8 to lift and lower, the vertical sliding rod 11 can limit and guide the upper positioning seat 8, enabling the upper positioning seat 8 to lift and lower smoothly vertically.

[0043] Specifically, rotating the lifting screw rod 10 can drive the upper positioning seat 8 to lift vertically, so that the distance between the upper positioning seat 8 and the lower positioning seat 9 can be adjusted arbitrarily, so as to fix syringes of any specification between the upper positioning seat 8 and the lower positioning seat 9.

[0044] The top end of the lifting screw rod 10 is fixedly connected with a knob 1001, which facilitates manually rotating the lifting screw rod 10 through the knob 1001, and the operation is more convenient.

[0045] See Figure 3 As shown, the inside of the upper positioning seat 8 is a hollow structure, and an inflatable expansion pressing component is also installed on the upper positioning seat 8. The inflatable expansion pressing component can perform arbitrary expansion deformation to press and fix syringes of different shapes and sizes.

[0046] See Figure 3 As shown, the inflatable expansion pressing component includes an air inlet 801 and a pressing airbag 802. Two groups of air inlets 801 are symmetrically arranged at the bottom of the upper positioning seat 8. Two groups of pressing airbags 802 are respectively fixedly connected to the bottom ends of the two groups of air inlets 801 by strong glue and completely seal the air inlets 801.

[0047] See Figures 2-4 As shown, one side of the upper positioning seat 8 is fixedly connected with an air pipe 13. One end of the air pipe 13 is fixedly connected with an air pump 12, and the air pipe 13 is fixedly connected to the output end of the air pump 12. The air pump 12 can inflate the inside of the upper positioning seat 8 through the air pipe 13, so as to inflate the pressing airbag 802 through the air inlet 801, making the pressing airbag 802 inflate and expand.

[0048] Among them, a check valve 1301 is also installed on the air pipe 13. Through the check valve 1301, it is possible to avoid gas leakage after inflation and ensure the stability of the expansion of the pressing airbag 802.

[0049] Specifically, during the process of the air pump 12 inflating the inside of the upper positioning seat 8, the pressing airbag 802 will continuously expand and gradually contact the syringe on the lower positioning seat 9. When the pressing airbag 802 starts to contact the syringe, the pressing airbag 802 will deform accordingly according to the shape of the syringe during subsequent expansion, so as to fully fit tightly with the syringe, and hold and press the syringe under the action of air pressure, realizing the fixation of the syringe.

[0050] In this way, the pressing airbag 802 not only has sufficient pressure on the syringe, enabling it to be firmly fixed and not easy to shake, but also the syringe is stressed evenly, and the syringe will not be deformed or damaged by pressure. Ensure the use accuracy of the microfluidic injection pump.

[0051] In addition, the pressing airbag 802 can deform accordingly according to the shape and specifications of the syringe, so that it can firmly press and fix syringes of any specification and any shape, with extremely strong applicability.

[0052] It should be noted that through two groups of pressing airbags 802, not only can two groups of syringes of the same specification be fixed simultaneously, but also two groups of syringes of different specifications can be fixed. In practical applications, it can be applied to the situation where multiple syringes are used in combination, with good application prospects.

[0053] Refer to Figure 3 and Figure 6 As shown, a first pressure sensor 803 is fixedly connected inside the upper positioning seat 8. Through the first pressure sensor 803, the gas pressure inside the upper positioning seat 8 can be monitored. The gas pressure inside the upper positioning seat 8 is the pressing force of the pressing airbag 802 on the syringe. By monitoring the pressure inside the upper positioning seat 8, the pressure of the pressing airbag 802 on different syringes can be monitored in real time.

[0054] Among them, refer to Figure 6 As shown, the first pressure sensor 803 is wirelessly connected to the Internet of Things control module, and the Internet of Things control module can process and analyze the pressure signal obtained by the first pressure sensor 803. For syringes of different shapes and different specifications, thresholds can be set according to the pressing force required to fix different syringes. During the inflation process, when the first pressure sensor 803 monitors that the pressure inside the upper positioning seat 8 reaches this threshold, it indicates that the pressing airbag 802 has completely pressed and fixed the corresponding syringe. At this time, the Internet of Things control module automatically shuts down the air pump 12 to achieve control of the pressing force.

[0055] In this way, corresponding pressures can be applied to different syringes for fixation, and the pressing force can be controlled within a reasonable range. At the same time, the maximum threshold of the air pressure can also be set to prevent safety hazards such as explosion due to excessive air pressure inside the upper positioning seat 8, and the safety during use can be improved.

[0056] Refer to Figure 3 As shown, a first pressure relief valve 804 is also fixedly installed on the upper positioning seat 8. Through the first pressure relief valve 804, the inside of the upper positioning seat 8 can be depressurized. When the fixed syringe needs to be removed, by depressurizing through the first pressure relief valve 804, the pressing airbag 802 can lose its fixing effect on the syringe, and then the syringe can be removed.

[0057] Refer to Figure 3 As shown, the inside of the lower positioning seat 9 is a hollow structure, and a negative pressure adsorption positioning component is also installed on the lower positioning seat 9. The negative pressure adsorption positioning component is used for pre-positioning and fixing the syringe.

[0058] Among them, the negative pressure adsorption positioning component includes a placement groove 901, an adsorption airbag 902, and an air extraction port 904. Multiple groups of placement grooves 901 are provided on the lower positioning seat 9, and the placement grooves 901 are used to place syringes. The adsorption airbag 902 is fixedly connected inside the placement groove 901. Multiple groups of adsorption holes 9021 are provided on the adsorption airbag 902, and through the adsorption holes 9021, the adsorption airbag 902 can adsorb and fix the syringe.

[0059] Refer Figure 3 and Figure 5 As shown, the air extraction port 904 is opened inside the placement groove 901 and is used to connect the inside of the lower positioning seat 9 and the adsorption airbag 902. One side of the lower positioning seat 9 is fixedly connected with an air extraction pipeline 14, and one end of the air extraction pipeline 14 is fixedly connected with the input end of the air pump 12. The air pump 12 can extract the air inside the lower positioning seat 9 through the air extraction pipeline 14, making the inside of the lower positioning seat 9 in a negative pressure state, and at the same time making the inside of the adsorption airbag 902 also in a negative pressure state. By means of the principle of negative pressure adsorption, the syringe can be adsorbed and fixed through the adsorption holes 9021.

[0060] Specifically, after the syringe is placed inside the lower positioning seat 9, the air pump 12 first extracts the gas inside the lower positioning seat 9 and injects it into the upper positioning seat 8. At this time, the inside of the lower positioning seat 9 is in a negative pressure state, and the syringe can be pre-adsorbed and fixed through the adsorption holes 9021 in advance, realizing the pre-positioning of the syringe, and then it is tightly fixed through the pressing airbag 802. In this way, it can avoid the skew of the syringe during the pressing and fixing process and improve the fixing effect on the syringe at the same time.

[0061] It should be noted that through automatic pre-positioning and automatic pressing and fixing, the assembly of the syringe no longer overly depends on the manual operation of relevant staff, greatly simplifies the assembly steps of the syringe, reduces the error probability during the operation, saves time and effort, and can effectively improve the use efficiency of the microfluidic injection pump.

[0062] Refer Figure 3 and Figure 6 As shown, a second pressure sensor 903 is fixedly connected inside the lower positioning seat 9, and the air pressure inside the lower positioning seat 9 can be monitored in real time through the second pressure sensor 903. The second pressure sensor 903 is also wirelessly connected to the Internet of Things control module and can send the monitored pressure data to the Internet of Things control module.

[0063] Refer Figures 2-4As shown, a branch pipe 1401 is also fixedly connected to the air extraction pipeline 14. The air pump 12 can not only extract the air inside the lower positioning seat 9 through the air extraction pipeline 14, but also extract the external air through the branch pipe 1401 for inflating the upper positioning seat 8. An electromagnetic valve 1402 is installed on the branch pipe 1401. The electromagnetic valve 1402 is wirelessly connected to the Internet of Things control module, and the Internet of Things control module can control the opening and closing of the electromagnetic valve 1402.

[0064] For syringes of different shapes and specifications, the threshold value can be set according to the negative pressure adsorption force required by different syringes. During the air extraction process, when the second pressure sensor 903 monitors that the pressure inside the lower positioning seat 9 reaches this threshold value, it indicates that the adsorption pre-positioning of the corresponding syringe has been completed through the adsorption holes 9021. At this time, the Internet of Things control module automatically opens the electromagnetic valve 1402, and the air pump 12 extracts the external air through the branch pipe 1401 and fills it into the upper positioning seat 8 until the pressing airbag 802 expands to press and fix the syringe. In this way, the overall safe and stable operation can be ensured, and it is not easy to have failures.

[0065] See Figure 3 As shown, a second pressure relief valve 905 is also fixedly installed on the lower positioning seat 9. Through the second pressure relief valve 905, the inside of the lower positioning seat 9 can be depressurized, so that the pressure inside the lower positioning seat 9 is restored, the adsorption force on the syringe is removed, and the syringe can be smoothly removed.

[0066] During use, first place the used syringe inside the placement groove 901, and then adjust the height of the upper positioning seat 8 according to the size of the syringe so that the pressing airbag 802 can make initial contact with the syringe. Then start the air pump 12. The air pump 12 first extracts the air inside the lower positioning seat 9 to make the inside of the lower positioning seat 9 in a negative pressure state until the syringe is adsorbed and fixed by the adsorption holes 9021, realizing the pre-positioning of the syringe.

[0067] After that, the electromagnetic valve 1402 is automatically opened, and the air pump 12 extracts the external air and injects it into the upper positioning seat 8 to make the pressing airbag 802 inflate and expand until the syringe is completely pressed and fixed, completing the assembly of the syringe.

[0068] Finally, by controlling the driving motor 4 to drive the rotation of the translation screw rod 5, thereby driving the injection push block 7 to move and pushing the piston rod of the syringe to move, accurately controlling the inflow and outflow of the fluid, and realizing the control of the usage amount of various fluid reagents through the microfluidic injection pump.

[0069] This invention can securely fix syringes of any size and shape without causing any damage or deformation. It effectively avoids the reduction in the accuracy of microfluidic injection pumps caused by syringe shaking, damage, or deformation. At the same time, it can automatically fix multiple sets of syringes of different sizes and shapes without requiring excessive manual operation, saving time and effort and improving the efficiency of microfluidic injection pumps.

[0070] The foregoing description of specific exemplary embodiments of the invention is for illustrative and explanatory purposes. These descriptions are not intended to limit the invention to the precise forms disclosed, and it will be apparent that many changes and variations can be made in accordance with the foregoing teachings. The exemplary embodiments were chosen and described in order to explain the specific principles of the invention and its practical application, thereby enabling those skilled in the art to implement and utilize various different exemplary embodiments of the invention, as well as various different choices and variations. The scope of the invention is intended to be defined by the claims and their equivalents.

Claims

1. A microfluidic injection pump, characterized in that, include: The base is equipped with a touch screen, which is used to control the use of the microfluidic injection pump; The transmission mechanism includes a drive assembly and an injection pusher, the injection pusher being mounted on the drive assembly, the drive assembly being capable of driving the injection pusher to move horizontally and thus moving the syringe piston rod; A universal fixing mechanism includes an upper positioning seat and a lower positioning seat, wherein the upper positioning seat is located above the lower positioning seat, and a lifting adjustment structure is provided between the upper positioning seat and the lower positioning seat; The upper positioning seat is also equipped with an inflation expansion and clamping assembly, which can expand and deform arbitrarily to clamp and fix syringes of different shapes and sizes. The lower positioning seat is also equipped with a negative pressure adsorption positioning assembly, which is used to pre-position and fix the syringe. The drive assembly includes a fixed base, a drive motor, a translation screw, and a horizontal slide bar. The fixed base is fixedly connected to the top of the base. Multiple sets of drive motors are mounted on the fixed base. One end of the translation screw is fixedly connected to the output end of the drive motor. The injection pusher is threadedly connected to the translation screw. Multiple sets of horizontal slide bars are fixedly connected to the fixed base. One end of the horizontal slide bar passes through the injection pusher, and the injection pusher is slidably connected on the horizontal slide bar. The lifting adjustment structure includes a lifting screw and a vertical slide rod. The bottom end of the lifting screw is rotatably connected to the lower positioning seat, and the top end of the lifting screw passes through the upper positioning seat. The lifting screw is threadedly connected to the upper positioning seat. Multiple sets of vertical slide rods are fixedly connected to the lower positioning seat. The top end of the vertical slide rod passes through the upper positioning seat, and the vertical slide rod is slidably connected to the upper positioning seat. The inflatable expansion and compression assembly includes an inflation port and a compression airbag. Multiple sets of inflation ports are provided at the bottom of the upper positioning seat. The compression airbag is fixedly connected to the bottom end of the inflation port. An inflation pipe is fixedly connected to one side of the upper positioning seat, and an air pump is fixedly connected to one end of the inflation pipe.

2. A microfluidic injection pump as described in claim 1, characterized in that, The injection pusher has a limiting groove.

3. A microfluidic injection pump as described in claim 1, characterized in that, A knob is fixedly connected to the top of the lifting screw.

4. A microfluidic injection pump as described in claim 1, characterized in that, The upper positioning seat is internally fixedly connected to a first pressure sensor.

5. A microfluidic injection pump as described in claim 1, characterized in that, The negative pressure adsorption positioning component includes a placement groove, an adsorption airbag, and an air extraction port. The placement groove has multiple sets on the lower positioning seat. The adsorption airbag is fixedly connected inside the placement groove and has multiple sets of adsorption holes. The air extraction port is located inside the placement groove and is used to connect the lower positioning seat and the inside of the adsorption airbag. An air extraction pipe is fixedly connected to one side of the lower positioning seat, and one end of the air extraction pipe is fixedly connected to the input end of an air pump.

6. A microfluidic injection pump as described in claim 5, characterized in that, A branch pipe is also fixedly connected to the air extraction pipeline, and a solenoid valve is installed on the branch pipe.

7. A microfluidic injection pump as described in claim 5, characterized in that, A second pressure sensor is fixedly connected inside the lower positioning seat.

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