A timed and dosed liquid automatic perfusion system and an automatic perfusion method

Abstract

The application discloses a kind of timing quantitative liquid automatic perfusion system and automatic perfusion method, including separable connection console and injection table, console is used for parameter setting, injection table includes control module, rotary positioning module, lifting injection module and quantitative delivery module, control module receives and stores parameters when connecting, independently controls each module coordinated operation after separation, rotary positioning module is used to carry sample test tube, and high-precision positioning is realized using photoelectric sensor and color coding stripe at the bottom of rotary disc, lifting injection module is driven by screw rod and can be lifted injection needle, quantitative delivery module realizes liquid quantitative delivery, method includes parameter configuration, equipment preparation and automatic perfusion cycle step.Such, through modular separable design, realize the low cost, small volume, simple operation and accurate operation of automatic liquid perfusion, effectively solve the problem of complex structure, high cost and large space occupation of existing equipment.

Description

Technical Field

[0001] This invention relates to the field of liquid reaction detection equipment technology, and in particular to a timed and quantitative automatic liquid filling system and automatic filling method. Background Technology

[0002] In fields such as chemical synthesis, biological reactions, and analytical testing, it is often necessary to perform timed and quantitative liquid sample injection operations, such as adding reagents or taking samples into reaction tubes. These operations require precise control of the injection time and liquid volume, and measures (such as sealing) must be taken to prevent liquid evaporation or contamination.

[0003] Existing automated liquid reaction testing and processing equipment, such as large liquid workstations or robotic arm systems, while powerful, generally suffer from the following drawbacks: complex structure, high manufacturing costs, making them difficult to popularize in small and medium-sized laboratories or conventional production lines; large equipment size, occupying valuable laboratory or production line space, and requiring professional maintenance personnel; cumbersome operation: steps such as changing injection needles and positioning test tubes rely on manual calibration, resulting in low automation and impacting testing efficiency. These shortcomings limit the application of automated liquid filling technology in a wider range of scenarios.

[0004] Therefore, there is an urgent need for a low-cost, small-volume, and easy-to-operate automatic liquid filling system with timed and quantitative dispensing. Summary of the Invention

[0005] To address the technical problems existing in the background art, the present invention proposes a timed and quantitative automatic liquid injection system and an automatic injection method.

[0006] The present invention proposes a timed and quantitative automatic liquid filling system, comprising a detachably connected control console and a liquid filling station;

[0007] The console includes a human-machine interaction module and a first connection module. The human-machine interaction module is used to input operating parameters, and the first connection module is used to realize the mechanical docking and electrical connection between the console and the injection station.

[0008] The injection station includes a control module, a rotation positioning module for carrying and positioning at least one sample tube to be tested, a lifting injection module, a quantitative delivery module, and a second connection module. The second connection module is adapted to connect with the first connection module. The control module is used to receive and store the operating parameters transmitted by the control console, and independently control the coordinated operation of the rotation positioning module, the lifting injection module, and the quantitative delivery module to achieve timed and quantitative injection into the sample tube to be tested.

[0009] Preferably, the injection stage includes:

[0010] The shell has an internal cavity and an opening at the top;

[0011] A panel is provided at the opening.

[0012] Preferably, the first connection module includes a first magnetic suction member and a first electrical connector, the second connection module includes a second magnetic suction member that magnetically engages with the first magnetic suction member and a second electrical connector that is adapted to the first electrical connector, the first connection module further includes a positioning protrusion, and the second connection module further includes a positioning groove that is adapted to engage with the positioning protrusion, the positioning protrusion and the positioning groove cooperating to realize the docking of the control console and the injection stage.

[0013] Preferably, the rotation positioning module includes:

[0014] A rotating disk, used to carry at least one of the sample tubes, is rotatably connected to the upper surface of the panel via a planar thrust bearing;

[0015] A drive motor is fixed inside the cavity below the panel, and the upper end of its output shaft is connected to the rotating disk through the panel to drive the rotating disk to rotate.

[0016] A photoelectric sensor assembly is used to detect the rotational position of the rotating disk, so that the rotating disk is precisely aligned with the lifting and injecting module.

[0017] Preferably, the lifting and lowering liquid injection module includes:

[0018] The guide rod is provided at least one and is vertically fixed to the panel. The panel is provided with an elliptical adjustment groove for fixing the lower end of the guide rod. The lower end of the guide rod is threaded and locked with the elliptical adjustment groove by a nut.

[0019] A lead screw, arranged parallel to the guide rod and driven by a lifting motor, is located inside the cavity below the panel;

[0020] The lifting assembly includes a lifting platform that is threadedly engaged with the lead screw. The lifting platform has a guide hole that is slidably engaged with the guide rod. A liquid injection needle is vertically and detachably connected to the lifting platform. The liquid injection needle is used to communicate with the quantitative delivery module and inject liquid into the sample tube.

[0021] Preferably, the quantitative delivery module is configured as a fluid delivery pump, with the inlet of the fluid delivery pump connected to a liquid source and the outlet connected to the injection needle.

[0022] Preferably, the rotating disk is formed by stacking and fixing multiple disk bodies, and multiple test tube holes are evenly opened along the circumference of the disk. The test tube holes are adapted to use sample test tubes with elastic sealing caps on the top.

[0023] Preferably, the bottom of the rotating disk is provided with colored coded stripes, and the photoelectric sensor component is a color sensor that is installed below the panel and has its detection direction facing the bottom of the rotating disk, used to identify the colored coded stripes to determine the angular position of the rotating disk.

[0024] Preferably, the panel has a central through hole corresponding to the output shaft of the drive motor, and a circular groove is provided with the through hole as the center. The planar thrust bearing is disposed in the circular groove, and the rotating disk is supported on the planar thrust bearing.

[0025] The present invention also proposes a timed and quantitative automatic liquid infusion method, based on the timed and quantitative automatic liquid infusion system described in any of the above claims, comprising the following steps:

[0026] S1. Parameter configuration: Magnetically connect the detachable console to the injection station, input the infusion parameters through the human-machine interaction module, and transmit the infusion parameters to the control module of the injection station via electrical connection and store them. After setting the infusion parameters, detach the console.

[0027] S2. Equipment preparation: Install the rotating disk containing the sample tubes onto the panel and connect it to the drive motor, and connect the quantitative delivery module to the fluid path of the liquid source and injection needle.

[0028] S3. Automatic infusion: The control module independently executes the infusion process according to the stored infusion parameters, controls the rotary positioning module to move the target sample tube to the infusion station, controls the infusion needle of the lifting infusion module to descend to the infusion position, controls the quantitative delivery module to infuse a fixed amount of liquid into the target sample tube, and controls the infusion needle to reset after the infusion is completed.

[0029] S4. Rotate the positioning module to the next test tube position and repeat step S3 until all test tubes are filled.

[0030] In summary, this invention has the following beneficial effects: Reduced application costs: The modular design of the detachable control console and injection station allows the control console to be used with multiple injection stations without requiring separate human-machine interface components for each station. This effectively reduces the overall purchase and maintenance costs of the equipment, solving the problem of high costs associated with existing integrated equipment and making it more suitable for widespread application in small and medium-sized testing scenarios; Significantly reduced space occupation: After parameter settings are completed, the control console can be separated from the injection station, allowing the injection station to operate independently without occupying the console's space for extended periods. Simultaneously, the injection station integrates rotation positioning, lifting injection, and quantitative delivery functions, resulting in a compact structure that solves the problem of traditional equipment being bulky and unsuitable for space-constrained locations such as laboratories; Simplified operation procedures and improved automation. Advanced features: The human-machine interface module of the control console allows for intuitive input of injection parameters. These parameters are transmitted to the control module of the injection station via the connection module. The control module can independently coordinate the operation of each module without the need for real-time manual monitoring and calibration. The rotary positioning module enables automatic repositioning of sample tubes, and the lifting injection module works in conjunction with the quantitative delivery module to complete precise injection. This solves the pain points of cumbersome operation and low automation of existing equipment, improving the efficiency and accuracy of chemical liquid reaction detection. Enhanced system adaptability and scalability: The modular structural design allows the control console and injection station to be upgraded or replaced individually according to testing needs. The rotary positioning module can adapt to sample tubes of different specifications. Compared with traditional integrated equipment, it has stronger flexibility and adaptability, and can meet diverse timed and quantitative injection needs.

[0031] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0032] Figure 1 This is a perspective view of the timed and quantitative automatic liquid filling system according to an embodiment of the present invention;

[0033] Figure 2 This is an exploded view of the timed and quantitative automatic liquid filling system according to an embodiment of the present invention;

[0034] Figure 3 This is a side sectional view of the timed and quantitative automatic liquid filling system according to an embodiment of the present invention;

[0035] Figure 4 This is a partial cross-sectional view of the timed and quantitative automatic liquid filling system according to an embodiment of the present invention.

[0036] Figure 5 This is an exploded view of the rotating disk according to an embodiment of the present invention.

[0037] In the picture:

[0038] 1. Control console; 2. Injection stage; 21. Housing; 22. Panel; 221. Circular groove; 3. First magnetic chuck; 4. Male electrode head; 5. Second magnetic chuck; 6. Female electrode head; 7. Rotary disk; 71. Test tube hole; 72. Color-coded stripes; 8. Sample test tube; 9. Planar thrust bearing; 10. Drive motor; 11. Color sensor; 12. Guide rod; 13. Lead screw; 14. Lifting platform; 15. Lifting motor; 16. Injection needle; 17. Peristaltic pump. Detailed Implementation

[0039] Embodiments of the present invention are described in detail below. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar symbols denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0040] like Figure 1-5 As shown, the automatic timed and quantitative liquid filling system proposed in this embodiment includes a control console 1 and a liquid filling station 2 that can be detachably connected;

[0041] The control console 1 includes a human-machine interaction module and a first connection module. The human-machine interaction module is used to input operating parameters, and the first connection module is used to realize the mechanical docking and electrical connection between the control console 1 and the injection station 2.

[0042] The human-computer interaction module typically integrates input devices such as buttons, touch screens, and knobs, as well as a display screen, for users to input perfusion operation parameters, such as perfusion interval time, single perfusion volume, number of cycles, and target test tube location.

[0043] The injection station 2 includes a control module, a rotary positioning module for carrying and positioning at least one sample tube 8 to be tested, a lifting injection module, a quantitative delivery module, and a second connection module. The second connection module is adapted to connect with the first connection module (for establishing a physical and electrical connection channel). The control module is used to receive and store the operating parameters transmitted by the control console 1, and independently control the rotary positioning module, the lifting injection module, and the quantitative delivery module to coordinate their actions in order to achieve timed and quantitative injection into the sample tube 8 to be tested.

[0044] It should be noted that when the control module is connected to the console 1, it receives and stores the operating parameters transmitted through the connection module; after being physically separated from the console 1, it can independently coordinate and control the precise actions of the rotary positioning module, the lifting liquid injection module and the quantitative delivery module based on the stored parameters, thereby automatically completing the timed and quantitative filling task of a series of test tubes 8 to be tested.

[0045] Thus, the detachable design of the control console 1 and the injection station 2 allows one control console 1 to serve multiple injection stations 2, greatly reducing the overall cost in multi-station applications. After parameter settings are completed, only the compact injection station 2 needs to be kept in the work area to operate autonomously, greatly saving space on the experimental bench or production line. Parameter settings are intuitive and quick, and the system runs fully automatically after one-button start, requiring no continuous supervision from professional personnel. The non-contact positioning using photoelectric sensor components ensures high accuracy and eliminates mechanical wear. The combination of the lifting injection module and the quantitative delivery module guarantees the accuracy of the injection position and volume.

[0046] Specifically, the injection station 2 includes:

[0047] The shell 21 has an internal cavity and an opening at the top;

[0048] The inner cavity is used to house various electrical components and mechanical parts.

[0049] Panel 22, located at the opening, forms the main working plane of the injection stage 2.

[0050] To facilitate operator observation and control, input devices such as buttons, touch screens, knobs, and displays are all located on the front of the housing 21.

[0051] Furthermore, the first connecting module includes a first magnetic attractor 3 and a first electrical connector, and the second connecting module includes a second magnetic attractor 5 that magnetically engages with the first magnetic attractor 3 and a second electrical connector (such as a pin-and-socket type) that adapts to the first electrical connector. The first connecting module also includes a positioning protrusion, and the second connecting module also includes a positioning groove that adapts to and engages with the positioning protrusion. The positioning protrusion and the positioning groove cooperate to achieve docking between the control console 1 and the liquid filling station 2. The magnetic attractor provides the main attraction force, while the cooperation between the positioning protrusion and the groove achieves precise physical alignment, ensuring accurate and stable contact of the electrical connector and preventing misconnection or poor contact.

[0052] Specifically, the first electrical connector is designated as the male electrode connector 4, and the second connector is designated as the female electrode connector 6. The control console 1 contains a first control circuit for receiving user-input parameters (such as injection interval time, single injection volume, number of cycles, etc.) and transmitting these parameters and programs to the injection station 2 via the male electrode connector 4. Magnetic alignment and physical contact are used to achieve a stable mechanical connection and reliable electrical connection between the control console 1 and the injection station 2. The injection station 2 integrates a control module (a mainboard controller containing a second control circuit) for receiving and storing parameters and programs from the control console 1 and for autonomously running the program after the control console 1 is detached.

[0053] Furthermore, the rotation positioning module includes:

[0054] The rotating disk 7, which carries at least one sample tube 8, is rotatably connected to the upper surface of the panel 22 via a planar thrust bearing 9.

[0055] Specifically, the rotating disk 7 can be formed by stacking and fixing multiple layers (such as upper, middle and lower three layers) of disk body with screws, which is sturdy. Multiple test tube holes 71 are evenly opened on its upper circumference for placing sample test tubes 8. The sample test tubes 8 are preferably of the type with an elastic sealing cap (such as a rubber stopper or silicone stopper) on the top.

[0056] The drive motor 10 (preferably a DC geared motor) is fixed inside the cavity below the panel 22, and its output shaft is connected to the rotating disk 7 through the panel 22 to drive the rotating disk 7 to rotate.

[0057] The photoelectric sensor assembly is used to detect the rotational position of the rotating disk 7, ensuring precise alignment between the rotating disk 7 and the lifting injection module. This ensures that each sample tube 8 can accurately stop at the preset "injection position" directly below the injection needle 16.

[0058] Specifically, to achieve high-precision non-contact positioning, the bottom of the rotating disk 7 is provided with color-coded stripes 72 with a specific pattern. The photoelectric sensor component is a color sensor 11, which is installed below the panel 22 and its detection direction is towards the stripe area on the bottom of the rotating disk 7. It is used to identify the color-coded stripes 72 to determine the angular position of the rotating disk 7. The color sensor 11 feeds back the position information to the control module by identifying the different color signals reflected back, thereby achieving more accurate angular positioning than ordinary photoelectric switches.

[0059] The output shaft of the DC geared motor passes vertically upward through the panel 22, and a rotating disk 7 is mounted on it. The bottom of the rotating disk 7 is provided with specific color-coded stripes 72. A square hole is opened on the panel 22 corresponding to the color stripes. A color sensor 11 is fixedly installed below the square hole. The light beam emitted by the color sensor 11 passes upward through the square hole and shines on the bottom of the rotating disk 7. By identifying the reflected stripe color signal, the control module can accurately control the rotation of the DC geared motor, thereby accurately positioning the test tube hole 71 on the rotating disk 7 below the injection needle 16.

[0060] It should be noted that the panel 22 has a central through hole corresponding to the output shaft of the drive motor 10 (preferably, a block-shaped baffle is provided in the through hole, which corresponds to the platform on the round shaft of the DC geared motor to transmit the rotational power of the motor), and a circular groove 221 is provided with the through hole as the center. The planar thrust bearing 9 is provided in the circular groove 221, and the rotating disk 7 is supported on the planar thrust bearing 9 to minimize rotational friction and form a rotational support structure with low frictional resistance.

[0061] Furthermore, a square hole is made on the front side of the panel and a glass window is embedded therein, making it easier for operators to observe.

[0062] In this embodiment, the lifting and lowering liquid injection module includes:

[0063] At least one guide rod 12 (as a guide reference) is provided and is vertically fixed to the panel 22. The panel 22 is provided with an elliptical adjustment groove for fixing the lower end of the guide rod 12. The lower end of the guide rod 12 is threaded and locked with the elliptical adjustment groove by a nut.

[0064] It should be noted that this design allows for fine-tuning of the verticality of the guide rod 12 during assembly, ensuring smooth and unhindered lifting and lowering movements.

[0065] The lead screw 13 is arranged parallel to the guide rod 12 and is driven by the lifting motor 15 (preferably a stepper motor). The lifting motor 15 is located inside the cavity below the panel 22.

[0066] The lifting assembly includes a lifting platform 14 threadedly engaged with a lead screw 13. The lifting platform 14 has a guide hole that slides with a guide rod 12. A vertically detachable injection needle 16 is connected to the lifting platform 14 (e.g., via a threaded connection for easy replacement or cleaning). The injection needle 16 communicates with the quantitative delivery module and injects liquid into the sample tube 8. A piercing-type sealing cap injection method is used; the injection needle 16 pierces the sealing cap during injection and is withdrawn afterward. The self-sealing property of the sealing cap effectively prevents the escape of volatile components from the test tube or the intrusion of external contaminants, making it particularly suitable for long-term, multi-batch reaction monitoring.

[0067] It should be noted that the lifting platform 14 slides with the guide rod 12 through the guide hole on it, and at the same time, it forms a screw rod 13 nut pair with the lead screw 13 through the internal thread. Therefore, when the lifting motor 15 drives the lead screw 13 to rotate, the lifting platform 14 can be precisely controlled to rise and fall vertically along the guide rod 12.

[0068] The fixing structure of guide rod 12 is as follows: Figure 3 As shown, the guide rod 12 is stably fixed to the panel 22 by the elliptical slot and nut to prevent loosening. The stepper motor is fixed to the bottom of the panel 22 by screws. The upper end of the lead screw 13 is fitted with a bearing, and the lead screw 13 and the guide rod 12 are fixed in position by a metal end block. The lifting platform 14, which is matched with the lead screw 13, moves up and down along the guide rod 12 by the rotation of the stepper motor. The side of the lifting platform 14 has a threaded hole, and the injection needle 16 is screwed into the lifting platform 14 through the thread, which is convenient for changing the injection needle 16 when using different reagents.

[0069] Specifically, the quantitative delivery module is configured as a fluid delivery pump, more specifically a peristaltic pump 17. The inlet of the fluid delivery pump is connected to a liquid source (such as a storage bottle or reaction vessel), and the outlet is connected to an injection needle 16 via a flexible tube, ensuring that a quantitative amount of liquid is drawn from the reaction vessel and injected into the sample tube 8. The control module can achieve high-precision quantitative liquid delivery by precisely controlling the operating time or number of steps of the peristaltic pump 17. The liquid pumped by the peristaltic pump 17 only comes into contact with the inner wall of the flexible tube, making it easy to replace and clean, and avoiding cross-contamination.

[0070] This embodiment also proposes a timed and quantitative automatic liquid infusion method, based on the timed and quantitative automatic liquid infusion system in the above embodiment, including the following steps:

[0071] S1. Parameter configuration: Connect the detachable control console 1 and the injection station 2 magnetically. Input the injection parameters through the human-machine interface module. The injection parameters are transmitted to the control module of the injection station 2 via electrical connection and stored. After setting the injection parameters, detach the control console 1.

[0072] S2. Install the rotating disk 7 containing the sample tube 8 onto the panel 22 and connect it to the drive motor 10, and connect the quantitative delivery module to the fluid passage of the liquid source and injection needle 16.

[0073] S3. Automatic infusion: The control module independently executes the infusion process according to the stored infusion parameters, controls the rotary positioning module to move the target sample tube 8 to the infusion station, controls the infusion needle 16 of the lifting infusion module to descend to the infusion position, controls the quantitative delivery module to infuse a fixed amount of liquid into the target sample tube 8, and controls the infusion needle 16 to reset after the infusion is completed.

[0074] The specific automatic filling process is as follows: First, the rotary positioning module is controlled to rotate the rotating disk 7, and the photoelectric sensor component performs position detection until the first target sample tube 8 is accurately moved to the "filling station" directly below the filling needle 16 and stops; then, the lifting filling module is controlled to rotate the lead screw 13, causing the lifting platform 14 to carry the filling needle 16 vertically downward until the needle tip pierces the test tube sealing cap and reaches the preset filling position; then, the quantitative delivery module is controlled to start the fluid delivery pump (such as peristaltic pump 17) to run for a set time, injecting a precise volume of liquid into the target sample tube 8 through the filling needle 16; after filling is completed, the control module instructs the filling needle 16 to rise and reset;

[0075] S4. Cyclic execution: The control module controls the rotary positioning module to rotate the rotary disk 7 to the next test tube position, repeating the infusion process of step S3; this cycle continues until the infusion task of all preset test tubes is completed, and the system automatically stops or enters standby mode.

[0076] Thus, by separating the control console 1 from the injection station 2, one control console 1 can serve multiple injection stations 2, significantly reducing the hardware cost of multi-station deployment. The injection station 2 itself uses standardized, low-cost components such as stepper motors, DC motors, and photoelectric sensors, simplifying its structure and making it easy to manufacture and maintain. After parameter settings are completed, only the compact injection station 2 needs to be kept running continuously in the work area (such as in a fume hood or incubator), while the control console 1 can be moved for other uses or stored away, greatly saving valuable laboratory or production line space. User interaction is concentrated only in the parameter setting stage, which can be quickly completed through an intuitive interface. After startup, the system runs fully automatically without manual intervention, significantly reducing the labor intensity and skill requirements of operators. The non-contact positioning using color sensor 11 and color-coded stripes 72 provides high positioning accuracy, no mechanical wear, and strong anti-interference capabilities. The lead screw 13 transmission lifting mechanism ensures the accuracy and repeatability of the vertical movement of the injection needle 16. The peristaltic pump 17 uses a mature and reliable quantitative method, providing accurate and easy-to-calibrate quantitative measurements. The three components work together to ensure high accuracy in timing and quantitative measurement.

[0077] It should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the present 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 the present invention.

[0078] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0079] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0080] 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 timed and metered automatic liquid filling system, characterized in that, Includes a detachable control console and injection station; The console includes a human-machine interaction module and a first connection module. The human-machine interaction module is used to input operating parameters, and the first connection module is used to realize the mechanical docking and electrical connection between the console and the injection station. The injection station includes a control module, a rotation positioning module for carrying and positioning at least one sample tube to be tested, a lifting injection module, a quantitative delivery module, and a second connection module. The second connection module is adapted to connect with the first connection module. The control module is used to receive and store the operating parameters transmitted by the control console, and independently control the coordinated operation of the rotation positioning module, the lifting injection module, and the quantitative delivery module to achieve timed and quantitative injection into the sample tube to be tested.

2. The timed and metered automatic liquid filling system according to claim 1, characterized in that, The injection station includes: The shell has an internal cavity and an opening at the top; A panel is provided at the opening.

3. The automatic liquid filling system with timed and quantitative dispensing according to claim 2, characterized in that, The first connection module includes a first magnetic suction member and a first electrical connector. The second connection module includes a second magnetic suction member that magnetically engages with the first magnetic suction member and a second electrical connector that is adapted to the first electrical connector. The first connection module also includes a positioning protrusion. The second connection module also includes a positioning groove that is adapted to engage with the positioning protrusion. The positioning protrusion and the positioning groove cooperate to realize the docking of the control console and the injection stage.

4. The automatic liquid filling system with timed and quantitative dispensing according to claim 2, characterized in that, The rotation positioning module includes: A rotating disk, used to carry at least one of the sample tubes, is rotatably connected to the upper surface of the panel via a planar thrust bearing; A drive motor is fixed inside the cavity below the panel, and the upper end of its output shaft is connected to the rotating disk through the panel to drive the rotating disk to rotate. A photoelectric sensor assembly is used to detect the rotational position of the rotating disk, so that the rotating disk is precisely aligned with the lifting and injecting module.

5. The timed and quantitative automatic liquid filling system according to claim 2, characterized in that, The lifting and injecting module includes: The guide rod is provided at least one and is vertically fixed to the panel. The panel is provided with an elliptical adjustment groove for fixing the lower end of the guide rod. The lower end of the guide rod is threaded and locked with the elliptical adjustment groove by a nut. A lead screw, arranged parallel to the guide rod and driven by a lifting motor, is located inside the cavity below the panel; The lifting assembly includes a lifting platform that is threadedly engaged with the lead screw. The lifting platform has a guide hole that is slidably engaged with the guide rod. A liquid injection needle is vertically and detachably connected to the lifting platform. The liquid injection needle is used to communicate with the quantitative delivery module and inject liquid into the sample tube.

6. The timed and quantitative automatic liquid filling system according to claim 5, characterized in that, The quantitative delivery module is configured as a fluid delivery pump, with the inlet of the fluid delivery pump connected to a liquid source and the outlet connected to the injection needle.

7. The timed and metered automatic liquid filling system according to claim 4, characterized in that, The rotating disk is composed of multiple layers of disk bodies stacked and fixed together, and multiple test tube holes are evenly opened along the circumference of the disk. The test tube holes are adapted to use sample test tubes with elastic sealing caps on the top.

8. The timed and metered automatic liquid filling system according to claim 4, characterized in that, The bottom of the rotating disk is provided with colored coded stripes. The photoelectric sensor component is a color sensor, which is installed below the panel and its detection direction is towards the bottom of the rotating disk. It is used to identify the colored coded stripes to determine the angular position of the rotating disk.

9. The timed and quantitative automatic liquid filling system according to claim 2, characterized in that, The panel has a central through hole corresponding to the output shaft of the drive motor, and a circular groove is provided with the through hole as the center. The planar thrust bearing is located in the circular groove, and the rotating disk is supported on the planar thrust bearing.

10. A method for automatic timed and quantitative liquid infusion, based on the automatic timed and quantitative liquid infusion system according to any one of claims 1-9, characterized in that, Includes the following steps: S1. Parameter configuration: Magnetically connect the detachable console to the injection station, input the infusion parameters through the human-machine interaction module, and transmit the infusion parameters to the control module of the injection station via electrical connection and store them. After setting the infusion parameters, detach the console. S2. Equipment preparation: Install the rotating disk containing the sample tubes onto the panel and connect it to the drive motor, and connect the quantitative delivery module to the fluid path of the liquid source and injection needle. S3. Automatic infusion: The control module independently executes the infusion process according to the stored infusion parameters, controls the rotary positioning module to move the target sample tube to the infusion station, controls the infusion needle of the lifting infusion module to descend to the infusion position, controls the quantitative delivery module to infuse a fixed amount of liquid into the target sample tube, and controls the infusion needle to reset after the infusion is completed. S4. Rotate the positioning module to the next test tube position and repeat step S3 until all test tubes are filled.

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