An automatic detection system for chemical samples

Abstract

The application discloses a chemical sample automatic detection system, and relates to the technical field of chemical laboratory automation equipment. The system comprises a test bench and a main control system, a plurality of function modules are arranged on the test bench, and the main control system is in communication connection with the function modules; the function modules comprise: a sample loading and cover opening module, comprising a sample placing disc, a sample loading mechanical arm and a cover opening station; a moisture detection module, comprising a transfer mechanical arm, a syringe assembly, a moisture meter and a first weighing module; a pretreatment liquid separation module, comprising a negative pressure liquid separation needle, an interactive mechanical arm and a second weighing module; a titration and pH detection module, comprising a reagent adding station, a titration instrument, a pH detection station and a three-dimensional movement module; a beaker cleaning and drying module, comprising a turnover feeding mechanism and a flow transfer mechanism, the flow transfer mechanism is sequentially provided with a first cleaning station and a first drying station; and a waste liquid quick-change collection module, comprising a waste liquid barrel. The system realizes high-precision detection, high-efficiency flow transfer and high-safety protection effect.

Description

Technical Field

[0001] This application relates to the field of automated equipment technology for chemical testing laboratories, and more specifically, to an automated chemical sample testing system. Background Technology

[0002] In petrochemical industry testing laboratories, it is often necessary to test highly toxic chemical samples such as acetone and cyanohydrin for indicators such as moisture, titration, and pH value.

[0003] Currently, such tests mostly rely on manual operation or semi-automatic equipment, but existing solutions have many technical drawbacks. 1. Conflict between large-volume dispensing and cleaning: Conventional pipettes have a maximum capacity of only 5 mL, which cannot meet the needs of large-volume dispensing; while plunger pumps can achieve large volumes, their tubing and pump chambers have cleaning dead zones, easily leading to cross-contamination of highly toxic samples. 2. Limited accuracy in weighing trace samples: Moisture detection often uses the weight reduction method, requiring multiple weighings of the syringe using a 0.01% balance. However, the vibration generated by the operation of the laboratory robotic arm easily interferes with the balance's accuracy, and existing automatic weighing fixtures are too heavy, affecting weighing sensitivity. 3. Low efficiency in container cleaning and drying: Glass beakers used for titration and pH testing are traditionally dried by top-blowing after cleaning. Because the hot air and the droplet's gravity are aligned, the inner wall and bottom of the beaker are not thoroughly dried, and the water pressure during cleaning can easily cause the beaker to shift. 4. Safety hazards in waste liquid collection: Replacing highly toxic waste liquid containers is cumbersome, the traditional threaded locking method has low sealing efficiency, and there is a lack of leakage prevention and full liquid warning mechanisms, which poses the risk of volatilization and leakage. Summary of the Invention

[0004] The main objective of this application is to provide an automated chemical sample testing system to achieve high-precision testing, high-efficiency transfer, and high-safety protection.

[0005] To achieve the above objectives, this application proposes an automated chemical sample testing system, including an experimental platform and a main control system. The experimental platform is equipped with multiple functional modules, and the main control system is communicatively connected to each functional module to coordinate their operation. The multiple functional modules include: a sample loading and unloading module, which includes a sample placement tray, a sample loading robotic arm, and an unloading station. The sample loading robotic arm is used to pick up sample bottles from the sample placement tray and move them to the unloading station, which is equipped with a rotating unloading mechanism; a moisture detection module, which includes a transfer robotic arm, a syringe assembly, a moisture meter, and a first weighing module. The syringe assembly is equipped with syringes of different capacities, and the transfer robotic arm is used to pick up the syringes and transfer them between the moisture meter and the first weighing module; The liquid separation module includes a negative pressure dispensing needle, an interactive robotic arm, and a second weighing module. The interactive robotic arm is used to grasp the negative pressure dispensing needle to separate the liquid in the sample bottle into a beaker. The titration and pH detection module includes a reagent adding station, a titrator, a pH detection station, and a three-dimensional moving module. The reagent adding station is used to pre-place the beaker. The lower end of the three-dimensional moving module integrates a stirring paddle, a pH electrode, a waste liquid suction pipe, and a cleaning spray nozzle. The beaker cleaning and drying module includes a flipping feeding mechanism and a transfer mechanism. The flipping feeding mechanism is used to grasp the beaker and flip it so that the beaker is in an inverted position with the mouth facing down. The transfer mechanism is sequentially provided with a first cleaning position and a first drying position. The waste liquid quick-change collection module includes a waste liquid tank with an openable and closed lid.

[0006] Furthermore, the syringe assembly is provided with a first volume syringe and a second volume syringe, the first volume syringe having a smaller capacity than the second volume syringe, wherein the first volume syringe is covered with a compatible sleeve, the outer diameter of the compatible sleeve being the same as the outer diameter of the second volume syringe.

[0007] Furthermore, the moisture meter is equipped with an automatic tilting cap mechanism for opening and closing the injection port. The automatic tilting cap mechanism includes: a drive cylinder, which is located on the experimental platform or the moisture meter; and a rotating bracket, which is located at the actuating end of the drive cylinder. The end of the rotating bracket is equipped with a rubber plug. The drive cylinder is used to drive the rotating bracket to rotate so that the rubber plug seals or opens the injection port of the moisture meter.

[0008] Furthermore, the negative pressure dispensing needle is constructed with a single-channel internal cavity and a sealing mechanism at the top. The sealing mechanism is used to seal the connection with the negative pressure pipeline of the negative pressure system. The negative pressure dispensing needle is used to draw up the sample and inject it into the beaker by drawing negative pressure.

[0009] Furthermore, the pretreatment liquid separation module also includes a parallel cleaning workstation, which includes a cleaning station, comprising a second cleaning station and a second drying station; and a cleaning robotic arm, which is used to grip the negative pressure liquid separation needle after liquid separation and move it sequentially into the second cleaning station and the second drying station.

[0010] Furthermore, the pH detection station includes at least a detection station, a third cleaning station, a storage station, and a multi-point calibration station, all of which are located within the movement range of the three-dimensional moving module.

[0011] Furthermore, the first cleaning position includes a cleaning nozzle located at the bottom and a lifting and pressing mechanism located above the cleaning nozzle. The cleaning nozzle is used to spray cleaning liquid upward to clean the inner cavity of the beaker, and the lifting and pressing mechanism is used to move up and down above the beaker to meet and disengage from the bottom of the beaker. The bottom of the first drying position is provided with a hot air output device with a vertically upward air outlet, which is used to blow hot air from bottom to top into the inner cavity of the inverted beaker.

[0012] Furthermore, the lifting and pressing mechanism includes a lifting mechanism and a pressing cap disposed at the execution end of the lifting mechanism. The lower end face of the pressing cap engages with the outer bottom of the inverted beaker, and the interior of the pressing cap is provided with a water tank.

[0013] Furthermore, the waste liquid quick-change collection module includes: a cabinet located below the experimental platform; a pull-out support plate located inside the cabinet, with the waste liquid tank located on the pull-out support plate; and a quick-clamping device located at the top of the cabinet, which is used to press down on the lid of the waste liquid tank.

[0014] Furthermore, the quick-clamping device includes: a clamping head with a sealing gasket at its bottom; a screw with one end threaded to the cabinet body and the other end equipped with a clamping head; wherein, the clamping head is locked in the dead position by pressing down the quick-clamping handle, and the screw is used to initially adjust the clamping height of the clamping head.

[0015] The technical solutions provided by the embodiments of this application may include the following beneficial effects: In this application, through structural optimization and synergistic cooperation of various functional modules, high stability of micro-weighing and residue-free operation of large-dose liquid separation are achieved in terms of detection accuracy. In terms of process efficiency, parallel flow of liquid separation, cleaning and detection processes and rapid drying and reuse of containers are achieved. In terms of operational safety, sealed collection of highly toxic waste liquid and fully automated operation without human contact are achieved. Overall, it overcomes the technical defects of insufficient accuracy, low efficiency and prominent safety hazards in the traditional petrochemical highly toxic sample detection process, significantly improves the consistency, reliability and ease of operation of the detection process, and is suitable for batch automated detection scenarios of highly toxic samples in petrochemical laboratories. Attached Figure Description

[0016] The accompanying drawings, which form part of this application, are used to provide a further understanding of the application and to make other features, objects, and advantages of the application more apparent. The illustrative embodiments and descriptions of this application are used to explain the application and do not constitute an undue limitation of the application. In the drawings: Figure 1A schematic diagram of the module layout structure of the automated chemical sample testing system provided in this application; Figure 2 for Figure 1 The diagram shows the structural schematic of the sample loading and cap opening module of the automated chemical sample testing system. Figure 3 for Figure 2 The diagram shows the structure of the sample loading and opening module along the AA direction; Figure 4 for Figure 1 The diagram shows the structure of the moisture detection module in an automated chemical sample testing system. Figure 5 for Figure 4 The diagram shown is a bottom view of the moisture detection module. Figure 6 for Figure 5 The diagram shows a side view of the moisture detection module. Figure 7 for Figure 1 The diagram shows the structure of the pretreatment and separation module of the automated chemical sample detection system. Figure 8 for Figure 7 The diagram shown is a bottom view of the pretreatment liquid separation module. Figure 9 for Figure 8 The diagram shows a side view of the pretreatment liquid separation module. Figure 10 for Figure 1 The diagram shows the structure of the titration and pH detection module in the automated chemical sample testing system. Figure 11 for Figure 10 The diagram shows the structure of the titration and pH detection module along the BB direction; Figure 12 for Figure 10 The diagram shows the structure of the titration and pH detection module along the CC direction; Figure 13 for Figure 1 The diagram shows the structure of the beaker cleaning and drying module in the automated chemical sample testing system. Figure 14 for Figure 13 The diagram shows the structural schematic of the transfer mechanism of the beaker cleaning and drying module. Figure 15 for Figure 14 A schematic diagram of the transfer mechanism along the DD direction; Figure 16 Figure 13 The diagram shows the structure of the flipping feeding mechanism of the beaker cleaning and drying module.

[0017] The system includes: 100-Automatic Chemical Sample Detection System, 101-Label, 10-Sample Loading and Cap Opening Module, 11-Sample Placement Tray, 12-Sample Loading Robotic Arm, 13-Cap Opening Station, 131-Rotating Cap Opening Mechanism, 20-Moisture Detection Module, 21-Transfer Robotic Arm, 22-Injector Assembly, 23-Moisture Analyzer, 24-First Weighing Module, 30-Pre-treatment Dispensing Module, 31-Negative Pressure Dispensing Needle, 32-Interactive Robotic Arm, 34-Parallel Cleaning Workstation, 341-Cleaning Station, 3411-Second Cleaning Station, 3412-Second Drying Station, 342-Cleaning Robotic Arm, 40-Titration and pH Detection Module, 41- 42-Reagent addition station, 43-Titrator, 43-pH detection station, 431-Detection station, 432-Third cleaning station, 433-Storage station, 434-Multi-point calibration station, 44-Three-dimensional moving module, 441-Stirring paddle, 442-pH electrode, 443-Waste liquid extraction pipe, 444-Cleaning nozzle, 50-Beaker cleaning and drying module, 51-Tilting feeding mechanism, 511-Rotating device, 512-Cylinder, 513-Gripper, 52-Transfer mechanism, 521-First cleaning station, 5211-Cleaning nozzle, 5212-Lifting and capping mechanism, 5213-Lifting mechanism, 5214-Capping, 522-First drying station. Detailed Implementation

[0018] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0019] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this application described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0020] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0021] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0022] Furthermore, the terms "installation," "setup," "equipped with," "connection," "linked," and "socketing" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0023] Figure 1 A modular layout diagram of an automated chemical sample testing system 100 provided according to this application is shown. Figure 1 As shown, the automated chemical sample testing system 100 includes an experimental platform 101 and a main control system. The experimental platform 101 is equipped with multiple functional modules, and the main control system is communicatively connected to each functional module to coordinate their operation. The multiple functional modules include: a sample loading and unloading module 10 (combined with...). Figure 2 and Figure 3 It includes a sample placement tray 11, a sample loading robotic arm 12, and a cap opening station 13. The sample loading robotic arm 12 is used to pick up sample bottles from the sample placement tray 11 and move them to the cap opening station 13. The cap opening station 13 is equipped with a rotating cap opening mechanism 131; a moisture detection module 20 (combined with...) Figures 4 to 6 It includes a transfer robotic arm 21, a syringe assembly 22, a moisture meter 23, and a first weighing module 24. The syringe assembly 22 is equipped with syringes of different capacities. The transfer robotic arm 21 is used to grip the syringes and transfer them between the moisture meter 23 and the first weighing module 24; a pretreatment separation module 30 (combined with...) Figures 7 to 9It includes a negative pressure dispensing needle 31, an interactive robotic arm 32, and a second weighing module (with the same anti-vibration platform structure as the first weighing module 24). The interactive robotic arm 32 is used to grip the negative pressure dispensing needle 31 to dispense the liquid in the sample bottle into a beaker; a titration and pH detection module 40 (combined with...) Figures 10 to 12 It includes a reagent adding station 41, a titrator 42, a pH detection station 43, and a three-dimensional moving module 44. The reagent adding station 41 is used to pre-place beakers. The lower end of the three-dimensional moving module 44 integrates a stirring paddle 441, a pH electrode 442, a waste liquid extraction pipe 443, and a cleaning spray pipe 444; the beaker cleaning and drying module 50 (combined with...) Figures 13 to 16 The device includes a flipping feeding mechanism 51 and a transfer mechanism 52. The flipping feeding mechanism 51 is used to pick up the beaker and flip it so that the beaker is in an inverted position with the mouth of the beaker facing down. The transfer mechanism 52 is provided with a first cleaning position 521 and a first drying position 522 in sequence. The waste liquid quick exchange collection module (not shown in the figure) includes a waste liquid tank with an openable and closed lid.

[0024] In practical application, after the operator places the highly toxic sample bottle to be tested into the corresponding station of the sample placement tray 11, the system can automatically complete the entire process of testing according to the preset procedure: the main control system coordinates each functional module to sequentially execute the following actions: opening the sample bottle at the capping station 13, moisture detection by the moisture detection module 20, large-dose liquid separation by the pretreatment liquid separation module 30, titration or pH detection by the titration and pH detection module 40, beaker cleaning and drying by the beaker cleaning and drying module 50, and waste liquid collection by the waste liquid quick exchange collection module (not shown in the figure). The entire process does not require manual contact with the sample or processing consumables.

[0025] According to the automated chemical sample detection system 100 of this application, the specific steps include: Step 1: The sample loading robotic arm 12 transfers the opened sample bottle to the sample bottle placement position of the moisture detection module 20 for moisture detection. Moisture detection includes: using the transfer robotic arm 21 to pick up the sample with a syringe, using the first weighing module 24 to determine the accurate injection volume through the weight reduction method, and injecting the sample into the moisture analyzer 23 for moisture detection. The injection port is opened and closed by the automatic capping mechanism before and after sample addition. Step 2: Large-dose dispensing: A large-dose sample is picked up by the negative pressure dispensing needle 31 through negative pressure sampling and injected into a beaker. Step 3: Titration and pH detection: Diluent or reagent is added to the beaker after dispensing at the reagent addition station 41 and then sent to the titrator 42 for titration detection, or the sample is transferred by the three-dimensional moving module 44. The integrated stirring paddle 441, pH electrode 442, and waste liquid suction pipe 443 are lowered into the beaker for pH detection. After detection, the waste liquid is drained by the planar suction effect of the bottom horizontal plane and the pH electrode 442 is cleaned by the diagonally arranged cleaning spray pipes 444. Step four, beaker cleaning and drying: The beaker after testing is placed upside down in the transfer mechanism 52. Water is sprayed to clean it at the first cleaning position 521. Then, hot air is blown into the inner cavity of the beaker at the first drying position 522 to dry the inner wall through hot pressure convection. Finally, the beaker is flipped back to the upright position by the flipping feeding mechanism 51. Step five, waste liquid safe collection: The waste liquid generated during the testing process is discharged into the waste liquid quick-change collection module (not shown in the figure) waste liquid bucket, and the bucket lid is sealed and locked.

[0026] Through the above-mentioned configuration, this application achieves high stability in micro-weighing and residue-free operation in large-dose liquid separation at the level of detection accuracy, through structural optimization and synergistic cooperation of various functional modules. At the level of process efficiency, it achieves parallel flow of liquid separation, cleaning, and detection processes and rapid drying and reuse of containers. At the level of operational safety, it achieves sealed collection of highly toxic waste liquid and fully automated operation without human contact. Overall, it overcomes the technical defects of insufficient accuracy, low efficiency, and prominent safety hazards in the traditional petrochemical highly toxic sample detection process, significantly improves the consistency, reliability, and ease of operation of the detection process, and is suitable for batch automated detection scenarios of highly toxic samples in petrochemical laboratories.

[0027] Furthermore, the system is primarily used for the automated detection of highly toxic samples such as acetone and cyanohydrin in the petrochemical industry. A manual person places a 250mL glass bottle or a custom-made 80mL glass bottle containing the sample into the sample placement tray 11 of the sample loading and opening module 10, fixing the hole position and attaching a label. The sample loading robotic arm 12 (which can be a six-axis robotic arm) picks up the sample bottle and moves it to the opening station 13. The opening station 13 is equipped with two sets of rotating modules; one set is dedicated to 250mL bottles, and the other set can be switched between 250mL and 80mL bottles to achieve automatic opening.

[0028] Furthermore, the first weighing module 24 may include: a balance platform, which is set on the ground independently of the experimental platform 101; a weighing balance (e.g., a 0.0001 metric balance), which is set on the balance platform and has an automatically opening and closing balance cover; and a bracket, which is set inside the weighing balance and has a weight-reducing elongated hole.

[0029] In this embodiment, during practical application, when syringe weighing is required, the main control system first controls the balance cover to open automatically. The transfer robotic arm 21 clamps the syringe and moves it to the upper part of the bracket inside the balance. After the syringe is placed stably in the corresponding position on the bracket, the robotic arm moves out of the balance cover area, and the cover automatically closes for weighing. Since the balance platform is independently set on the ground of the experimental table 101, the vibrations generated by the operation of the robotic arms above the experimental table 101 will not be transmitted to the weighing balance, ensuring that the weighing process is not disturbed by external vibrations. After weighing is completed, the cover opens automatically again, and the transfer robotic arm 21 can then clamp the syringe for subsequent operations.

[0030] Through the above settings, the first weighing module 24, with its independently placed anti-vibration structure design, combined with the lightweight perforated bracket and the automatic opening and closing outer cover, effectively isolates the vibration interference during system operation, significantly improves the accuracy and stability of micro-weighing, avoids the influence of external environmental airflow on the weighing results, and can complete high-precision weight reduction weighing operations without manual supervision, ensuring the accuracy of moisture detection sample injection calculation.

[0031] In accordance with the above, this application employs a weight reduction method for moisture detection. The weighing process is as follows: weighing the empty syringe, rinsing the syringe (drawing 5 mL and discarding, repeating 3 times), drawing 1.5 mL of sample, weighing the total weight of the sample, injecting it into the moisture analyzer 23, and weighing the residual weight after injection. The precise injection volume is calculated using the weight difference. Calibration procedure: using a 10 μL microsyringe to draw pure water, passing it through the needle wiping mechanism (a cylinder drives a sponge clamp to wipe the water droplets from the needle tip), and then injecting it into the moisture analyzer 23 to complete the calibration.

[0032] In this application, the implementation method of the second weighing module and its corresponding components is basically similar to the implementation method of the first weighing module 24 and its corresponding components. Specifically, the second weighing module may include a secondary balance platform and a secondary weighing balance. The secondary balance platform is independently installed on the floor of the experimental platform 101, and the secondary weighing balance (e.g., a 0.1% balance) is installed on the secondary balance platform. Its process requirements are lower than the 0.01% accuracy of the first weighing module 24, so an outer cover is not required to simplify the structure. The secondary weighing balance is provided with a positioning V-shaped groove that matches the needle contour of the negative pressure dispensing needle 31 to support the negative pressure dispensing needle 31. After the negative pressure dispensing needle 31 completes a single sample aspiration, the interactive robotic arm 32 first moves the negative pressure dispensing needle 31 to the positioning V-groove of the second weighing module for weighing. Then, the interactive robotic arm 32 moves the negative pressure dispensing needle 31 above the target beaker to complete the sample discharge. After the discharge, the interactive robotic arm 32 clamps the negative pressure dispensing needle 31 again and returns it to the second weighing module for residual weight weighing. The actual dispensing volume is calculated by the weight difference, thereby monitoring the sample transfer volume of the negative pressure dispensing needle 31 and verifying its accuracy. This forms a dual quality assurance system with the weight loss method weighing of the moisture detection module.

[0033] Furthermore, the syringe assembly 22 is equipped with a first volumetric syringe (10μL micro-calibration syringe) and a second volumetric syringe (conventional large-volume syringe), the first volumetric syringe having a smaller capacity than the second volumetric syringe. The first volumetric syringe is fitted with a compatible sleeve (plastic compatible sleeve), the outer diameter of which is the same as that of the second volumetric syringe.

[0034] In this embodiment, during practical application, the appropriate syringe capacity is first selected based on the testing requirements: for trace moisture calibration testing, a 10μL trace calibration syringe with a plastic compatible sleeve is selected; for routine moisture testing, a large-capacity syringe without a sleeve is selected. The grippers of the transfer robotic arm 21 do not need to be changed or adjusted in parameters, and can directly grip two syringes with the same outer diameter to complete the entire process of rinsing, aspiration, weighing, and injection.

[0035] With the above settings, this application achieves compatible transport of syringes of various specifications without additional modifications to the robotic arm grippers, transport paths, and weighing stations through a simple compatible sleeve adaptation design. This effectively simplifies the system structure, avoids gripper adaptation errors when switching between different syringe specifications, and improves the stability and operational flexibility of the testing process.

[0036] Furthermore, the end of the transfer robotic arm 21 is integrated with a dedicated push rod drive plate. When the syringe is transferred to the injection port of the moisture analyzer, the push rod pushes the syringe core to smoothly expel the sample.

[0037] Furthermore, in combination Figure 2 and Figure 3The rotating cap-opening mechanism 131 may include a cap-opening motor, a reduction gear transmission assembly, a clamping base, and a positioning assembly. The cap-opening motor is fixed to the bracket of the cap-opening station 13 and drives the clamping base to rotate around a vertical axis via the reduction gear transmission assembly (e.g., a synchronous belt or gear set). The clamping base is equipped with radially opening and closing jaws for gripping the outer peripheral wall of the sample bottle cap; the positioning assembly is located below the clamping base for radially positioning the bottle opening of the sample bottle to ensure that the jaws are aligned with the bottle cap. During cap opening, the loading robotic arm 12 moves the sample bottle onto the positioning assembly at the cap-opening station 13. The positioning assembly clamps the bottle body, and the cap-opening motor drives the clamping base to rotate, causing the bottle cap to rotate relative to the bottle body via the jaws, completing the unscrewing action. The clamping base and jaws are made of lightweight aluminum alloy to reduce the overall weight of the tooling and avoid affecting the subsequent weighing sensitivity.

[0038] Furthermore, an automatic tilting mechanism (not shown in the figure) for opening and closing the injection port may be provided above the moisture meter 23. The automatic tilting mechanism includes: a drive cylinder, which is provided on the experimental platform 101 or the moisture meter 23; a rotating bracket, which is provided at the execution end of the drive cylinder, and a rubber plug is provided at the end of the rotating bracket; wherein, the drive cylinder is used to drive the rotating bracket to rotate so that the rubber plug seals or opens the injection port of the moisture meter 23.

[0039] In this embodiment, during practical application, when the system determines that a sample needs to be added to the moisture meter 23, the main control system sends an action command to the drive cylinder. The drive cylinder drives the rotating bracket to rotate outward by a set angle, so that the rubber stopper at the end completely disengages and opens the injection port of the moisture meter 23. At this time, the transfer robotic arm 21 can clamp the syringe and inject the sample into the moisture meter 23. After the injection action is completed and it is confirmed that the syringe has moved out of the area above the injection port, the drive cylinder drives the rotating bracket to rotate in the opposite direction to reset, so that the rubber stopper is re-aligned and seals the injection port, completing the single sample addition process. Specifically, the drive cylinder is a horizontally arranged linear cylinder, and its cylinder body is hinged to the mounting lug on the side wall of the moisture meter. The piston rod of the drive cylinder is fixedly connected to a vertically extending rack. A gear is coaxially fixedly connected to the root of the rotating bracket, and the gear meshes with the rack for transmission. The rotating bracket is rotatably supported on a pivot support through a central pivot, and the pivot support is fixedly installed on the top surface of the moisture meter. When the piston rod of the drive cylinder extends or retracts, it drives the rack to move linearly. The meshing gears convert the linear motion into rotational motion, thereby driving the rotating bracket to complete the swinging motion around the central axis, which in turn drives the end rubber plug to open and close the injection port.

[0040] With the above settings, the automatic cap-sliding mechanism, through a cylinder-driven rotary sealing structure, can open and close the injection port as needed without manual opening and closing of the moisture meter 23 cap. This effectively avoids the problem of continuous evaporation of reagents inside the moisture meter 23, reduces reagent waste and organic pollution of the detection environment, and ensures the stability and accuracy of moisture detection results.

[0041] Furthermore, the negative pressure dispensing needle 31 can be constructed as a single-channel internal cavity structure with a sealing mechanism on the upper part. The sealing mechanism is used to seal the connection with the negative pressure pipeline of the negative pressure system. The negative pressure dispensing needle 31 is used to draw samples and inject them into the beaker by drawing negative pressure.

[0042] In this embodiment, during actual application, the interactive robotic arm 32 first clamps the negative pressure dispensing needle 31 and moves it into the sample bottle to be dispensed. The sealing mechanism on the upper part of the dispensing needle is sealed and connected to the negative pressure system pipeline. By drawing negative pressure, the sample is drawn into the single-channel inner cavity under negative pressure. After the sample volume reaches the preset requirement, the interactive robotic arm 32 moves the dispensing needle above the target beaker. Positive pressure is introduced into the inner cavity through the negative pressure system, so that the sample is completely pushed out into the beaker, completing a single dispensing operation.

[0043] With the above settings, the negative pressure dispensing needle 31 adopts a single-channel inner cavity structure without dead space, which avoids the residual contamination problem of the external waste liquid capillary in the traditional dual-channel dispensing structure. At the same time, it simplifies the overall structure of the dispensing needle, reduces the difficulty of cleaning, and can realize rapid and residue-free dispensing of large-dose samples. It effectively avoids the risk of cross-contamination during the dispensing process of highly toxic samples and improves the stability and reliability of dispensing operation.

[0044] In some embodiments, a photoelectric liquid level sensor may be provided at the top of the inner cavity of the negative pressure dispensing needle 31 to detect the sample aspiration height in real time, and to achieve accurate quantitative aspiration in conjunction with the preset volume parameters of the main control system; a two-position three-way solenoid valve is connected in series at the negative pressure pipeline interface. When aspirating, the solenoid valve opens to the negative pressure side, and when discharging, it switches to the positive pressure side to complete the sample ejection; when the sample is aspirated too much and the sample liquid level rises to the interface, the photoelectric sensor triggers the solenoid valve to quickly switch to the closed position, blocking the liquid from flowing further into the pipeline, and achieving reliable anti-backflow.

[0045] In a more specific structural design, the sealing mechanism may include a fixed sealing joint. The fixed sealing joint is coaxially and fixedly sleeved on the upper outer wall of the negative pressure dispensing needle 31. Its top outer circumference may have external threads for quick connection to the quick-connect fitting of the negative pressure pipeline. During sealing, the quick-connect fitting of the negative pressure pipeline is screwed downwards and tightened onto the external threads of the fixed sealing joint, ensuring airtightness between the negative pressure pipeline and the inner cavity of the dispensing needle. This prevents negative pressure leakage from affecting the accuracy of liquid aspiration and also prevents highly toxic samples from leaking from the connection point, improving operational safety.

[0046] Please refer to Figures 7 to 9Furthermore, the pretreatment liquid separation module 30 may also include a parallel cleaning workstation 34, which may include: a cleaning station 341, which includes a second cleaning station 3411 and a second drying station 3412; and a cleaning robotic arm 342 (e.g., a three-axis robotic arm) for gripping the negative pressure liquid separation needle 31 after liquid separation and moving it sequentially into the second cleaning station 3411 and the second drying station 3412.

[0047] In this embodiment, during actual application, after the interactive robotic arm 32 completes the liquid separation operation, it places the used negative pressure liquid separation needle 31 in the cleaning interactive station and then resets to execute the next liquid separation task. The cleaning robotic arm 342 automatically picks up the liquid separation needle, moves it to the second cleaning station 3411, connects it to the cleaning pipeline through the upper sealing mechanism of the liquid separation needle, and sequentially introduces alcohol and pure water to circulate and rinse the single-channel inner cavity. After rinsing, it moves it to the second drying station 3412, and introduces clean compressed air to completely dry the residual moisture in the inner cavity. After completion, the liquid separation needle can be returned to the standby station for the next liquid separation. The actions of the interactive robotic arm 32 and the cleaning robotic arm 342 are completely parallel and do not conflict.

[0048] With the above setup, the parallel cleaning workstation 34, through the task splitting and parallel cooperation design of the dual robotic arms (six-axis robotic arm and three-axis robotic arm), can complete the entire process of cleaning and drying the dispensing needle without occupying the working time of the dispensing interaction robotic arm 32. This significantly improves the overall efficiency of the dispensing operation, avoids the risk of cross-contamination when dispensing different batches of samples, simplifies the cleaning flow path of the dispensing needle, and ensures the continuous and stable operation of large-dose dispensing operations.

[0049] In summary, the sample is drawn up by the dispensing needle (after rinsing three times) and injected into a 50mL glass beaker. To improve efficiency, the dispensing module is equipped with an interactive robotic arm 32 (e.g., a six-axis robotic arm) and a cleaning robotic arm 342 (a three-axis robotic arm) working in parallel. The six-axis robotic arm (with a seventh-axis ground rail added to the bottom) is responsible for gripping the negative pressure dispensing needle 31 for dispensing interaction, and is placed in the interaction position after use. The cleaning robotic arm 342 (three-axis robotic arm) then grips the used negative pressure dispensing needle 31 and performs the following steps in sequence: alcohol aspiration cleaning (automatic opening of the rotating cylinder to introduce alcohol), pure water aspiration cleaning, and transfer to three drying positions. After sealing, compressed air is blown from above to dry the inner wall. The three negative pressure dispensing needles 31 rotate in turn, eliminating waiting time.

[0050] Please refer to Figures 10 to 12 Furthermore, the pH detection station 43 may include at least a detection station 431, a third cleaning station 432, a storage station 433, and a multi-point calibration station 434, all of which are located within the movement range of the three-dimensional moving module 44.

[0051] According to an embodiment of this application, in specific use, the three-dimensional moving module 44 moves the pH electrode 442 to the detection position 431, immersing the pH electrode 442 in the sample to be tested within the detection position 431. Simultaneously, the stirring paddle 441 integrated into the pH electrode 442 is activated. The stirring paddle 441 has a stirring motor, which is integrated with the pH electrode 442 at the moving end of the three-dimensional moving module 44. When the stirring motor is activated, the stirring paddle 441 mixes the sample to ensure uniform sample concentration, thus avoiding local concentration deviations from affecting the detection results. After the test is completed, the three-dimensional moving module 44 moves the pH electrode 442 to the third cleaning position 432. The cleaning nozzle 444 opens to spray cleaning fluid onto the surface of the pH electrode 442 to remove residual sample impurities. Subsequently, the waste liquid extraction pipe 443 opens the suction passage to directly extract and collect the used waste liquid, preventing waste liquid from spilling and contaminating the device. Once all testing is completed, the three-dimensional moving module 44 moves the pH electrode 442 to the storage position 433, placing the pH electrode 442 in the storage solution (usually potassium chloride solution) within the storage position 433 for moisturizing and storage, preventing the electrode from losing water and aging. When calibration of the pH electrode 442 is required, the three-dimensional moving module 44 drives the clamped pH electrode 442 to the multi-point calibration position 434, using standard calibration solutions of different concentrations to complete the multi-point calibration of the pH electrode 442.

[0052] With the above configuration, the pH detection station 43 in this embodiment integrates the stirring paddle 441, waste liquid extraction pipe 443, cleaning nozzle 444 and pH electrode 442, and moves synchronously with the three-dimensional moving module 44. This eliminates the need for multiple independently driven stirring and cleaning mechanisms, simplifies the overall structure of the device, reduces manufacturing costs and the probability of failure, reduces positioning errors and sample contamination risks caused by manual operation, and improves the accuracy and consistency of pH detection results.

[0053] Furthermore, the third cleaning position 432 may be equipped with a cleaning tank (or a cleaning cup may be used as the cleaning tank). When the pH electrode 442 moves to the third cleaning position 432, the lower ends of the pH electrode 442, the stirring paddle 441, the cleaning nozzle 444 and the waste liquid pumping pipe 443 are all housed in the cleaning tank, and the nozzle of the cleaning nozzle 444 is directly facing the outer wall of the pH electrode 442.

[0054] In this embodiment, during use, after the pH electrode 442 completes the pH detection of the current sample, the three-dimensional moving module 44 moves the pH electrode 442 to the third cleaning position 432, so that the lower ends of the pH electrode 442, the stirring paddle 441, the cleaning nozzle 444, and the waste liquid extraction pipe 443 are all contained in the cleaning tank. Subsequently, the cleaning nozzle 444 sprays cleaning fluid to thoroughly rinse the outer wall of the pH electrode 442. After cleaning, the waste liquid extraction pipe 443 is activated to quickly extract the waste liquid in the cleaning tank, avoiding interference from residual waste liquid to subsequent detection. In this way, by integrating spray cleaning and waste liquid extraction functions, the pH electrode 442 is automatically cleaned without the need for manual intervention to contact corrosive cleaning fluid, significantly reducing operational safety risks.

[0055] Furthermore, the storage position 433 may include a storage cup fixedly disposed on the base, the storage cup being used to hold an electrode storage solution (typically a potassium chloride solution) for immersing the glass bulb of the pH electrode 442.

[0056] In this embodiment, during specific use, after the pH electrode 442 completes sample detection, the three-dimensional moving module 44 moves the pH electrode 442 above the storage position 433, controlling the pH electrode 442 to descend so that the glass bulb is completely immersed in the potassium chloride solution in the storage cup. During the period when the pH electrode 442 is idle, the glass bulb remains submerged. When it is ready for reuse, the pH electrode 442 can be directly removed from the storage cup for detection.

[0057] By immersing the sensitive glass bulb of the pH electrode 442 in a special preservation solution, the above setup effectively prevents the glass bulb from aging due to dryness, significantly extending the electrode's lifespan. Simultaneously, the preservation solution keeps the glass bulb moist, ensuring the electrode responds quickly each time it is used, improving the accuracy and stability of the detection data. Furthermore, the fixed preservation cup has a simple structure, is easy to operate, requires no additional maintenance, and reduces operating costs.

[0058] Furthermore, the multi-point calibration position 434 may include at least three calibration cups fixedly arranged side by side on the base along the movement path of the three-dimensional moving module 44, the three calibration cups being used to hold calibration solutions with different known standard pH values ​​respectively.

[0059] In some embodiments of this application, the three calibration cups can hold standard buffer solutions of pH 4.0, pH 7.0, and pH 10.0, respectively.

[0060] In this embodiment, when calibrating the pH electrode 442, the three-dimensional moving module 44 moves the pH electrode 442 above the first calibration cup, controls the electrode to descend and immerse it in the calibration cup containing pH 4.0 standard buffer solution, and records the data after the electrode reading stabilizes. Subsequently, the three-dimensional moving module 44 moves the electrode to the second calibration cup, immerses it in pH 7.0 standard buffer solution for calibration, and records the data. Finally, the electrode is moved to the third calibration cup and immersed in pH 10.0 standard buffer solution to complete the calibration operation. In this way, by setting at least three calibration cups containing standard buffer solutions of different pH values, multi-point calibration of the pH electrode 442 can be achieved, effectively improving the accuracy and precision of the calibration. The calibration process is automatically completed by the three-dimensional moving module 44, simplifying the operation process and reducing the error of manual operation. This design is suitable for various pH detection scenarios with different accuracy requirements, has a wide range of applications, and is highly practical.

[0061] Furthermore, the three-dimensional moving module 44 includes three linear slides arranged along the horizontal X-axis, the horizontal Y-axis and the vertical Z-axis respectively, and the pH electrode 442 is fixed on the slider of the linear slide arranged along the vertical Z-axis.

[0062] In this embodiment, during specific use, the pH electrode 442 can be moved along the horizontal X-axis by controlling a linear slide arranged along the horizontal X-axis, thereby achieving precise left-right positioning; the pH electrode 442 can be moved along the horizontal Y-axis by controlling a linear slide arranged along the horizontal Y-axis, thereby achieving precise front-back adjustment; and the pH electrode 442 can be moved along the vertical Z-axis by controlling a linear slide arranged along the vertical Z-axis, thereby achieving lifting and lowering of the pH electrode 442, thus accurately immersing the pH electrode 442 into or removing it from the solution to be tested.

[0063] With the above settings, the three-dimensional moving module 44 can achieve precise movement of the pH electrode 442 in three-dimensional space, effectively improving the accuracy and precision of detection. At the same time, the three linear slides are independently controlled, making the movement of the pH electrode 442 more flexible and adaptable to the solution to be tested at different positions and depths, thus expanding the detection range.

[0064] Please refer to Figure 15 Furthermore, the first cleaning position 521 may include a cleaning nozzle 5211 located at the bottom and a lifting and pressing mechanism 5212 located above the cleaning nozzle 5211. The cleaning nozzle 5211 is used to spray cleaning liquid upward to clean the inner cavity of the beaker, and the lifting and pressing mechanism 5212 is used to move up and down above the beaker to abut and detach from the bottom of the beaker. The bottom of the first drying position 522 is provided with a hot air output device with a vertically upward air outlet, which is used to blow hot air from bottom to top into the inner cavity of the inverted beaker.

[0065] According to the embodiments of this application, the beaker to be processed is first flipped over to a position with its mouth facing down by the flipping feeding mechanism 51. The flipping feeding mechanism 51, driven by the interactive robotic arm 32 (e.g., a six-axis robotic arm), transports the beaker to the first cleaning position 521 of the carrying station, or the first cleaning position 521 of the carrying station is moved below the beaker by the operation of the transfer mechanism 52 itself. After the flipping feeding mechanism 51 places the beaker on the first cleaning position 521, the lifting and pressing cap mechanism 5212 presses down to fix the beaker, and the cleaning nozzle 5211 at the bottom sprays cleaning liquid upward through the through hole to rinse the inner cavity. At the same time, the cleaning components on the lifting and pressing cap mechanism 5212 spray the outer bottom and outer wall of the beaker. After cleaning, the beaker is transported to the first drying position 522, and the hot air output device blows hot air (such as clean hot air at 80°C) into the inner cavity of the inverted beaker from bottom to top through the through hole to achieve rapid drying.

[0066] With the above settings, the inverted cleaning method solves the problem of residual stains at the bottom of the inner cavity that exists in traditional upright cleaning. Combined with the all-round spray design, the cleaning is more thorough. The inverted drying method allows water to drip naturally under the action of gravity. Combined with hot air blowing from the inside out, the drying efficiency is greatly improved and the processing cycle is effectively shortened. It is suitable for automated cleaning and drying operations of batch beakers.

[0067] In this application, the temperature and wind speed of the hot air output device (e.g., a hot air gun) can be PID-regulated according to the beaker material and room temperature to achieve the best drying efficiency and energy consumption balance.

[0068] Please refer to Figure 16 Furthermore, the flipping and feeding mechanism 51 may include: a rotating device 511 (e.g., a rotary cylinder) for connecting to an external robot; a cylinder 512 located at the actuating end of the rotating device 511; and a gripper 513 located at the actuating end of the cylinder 512, wherein the cylinder 512 is used to drive the gripper 513 to hold the beaker; wherein the rotating device 511 is used to drive the cylinder 512 to flip.

[0069] In this embodiment, during use, the glass beaker to be cleaned is transferred by the conveying mechanism to the working area of ​​the flipping and loading mechanism 51. The cylinder 512 drives the gripper 513 to approach and clamp the mouth of the beaker. Subsequently, the rotating device 511 is activated, causing the gripper 513 and the clamped beaker to flip synchronously, so that the beaker opening faces downward. After the loading action is completed, the beaker is transferred to the subsequent first cleaning position 521.

[0070] With the above settings, the flipping feeding mechanism 51 can realize the automated gripping and flipping of beakers without the need for manual adjustment of the beaker posture, effectively avoiding the safety risks caused by manual operation, while greatly improving the feeding efficiency and ensuring the continuous and stable operation of subsequent cleaning and drying processes.

[0071] Furthermore, the beaker is initially positioned with its rim facing upwards, and the rotation angle of the rotating device 511 is 180°.

[0072] In this embodiment, the beaker to be processed is placed at the designated station with its opening facing upwards. After the equipment is started, the rotating device 511 drives the gripper 513 mechanism to grasp the beaker, and then completes a 180° flip, so that the beaker enters the subsequent cleaning or drying process with its opening facing downwards. This structure, on the one hand, replaces manual operation with automated flipping, avoiding operator contact with highly hazardous chemical samples and effectively improving operational safety; on the other hand, the precise 180° flip ensures that the beaker opening is completely downwards, providing a pre-guarantee for subsequent thorough cleaning and efficient drying processes, significantly improving overall processing efficiency and effectiveness.

[0073] Furthermore, the cleaning nozzle 5211 sprays vertically upwards and is directed directly at the inner wall of the bottom of the inverted beaker.

[0074] In this embodiment, during use, when the beaker is moved to an inverted position by the flipping mechanism and positioned directly below the first cleaning position 521, the cleaning nozzle 5211 starts working, spraying cleaning fluid vertically upwards to precisely rinse the inner wall of the beaker bottom and the edge of the beaker rim. This vertical upward spray direction ensures that the cleaning fluid fully contacts every corner of the beaker's inner wall, completely solving the cleaning blind spot problem inherent in traditional side-spray methods.

[0075] Please return Figure 15 Furthermore, the lifting and pressing mechanism 5212 includes a lifting mechanism 5213 and a pressing cover 5214 disposed at the execution end of the lifting mechanism 5213. The lower end face of the pressing cover 5214 is engaged with the outer bottom of the inverted beaker, and a water tank is provided inside the pressing cover 5214.

[0076] In this embodiment, during use, the lifting mechanism 5213 lowers the pressure cap 5214, causing its lower end face to precisely engage with the bottom of the inverted beaker, thus achieving stable fixation of the beaker. If the pressure cap 5214 has a water tank inside, cleaning fluid can be injected into the tank, and the contact between the water tank and the bottom of the beaker completes the immersion cleaning. After cleaning, the lifting mechanism 5213 raises the pressure cap 5214, releasing the fixation of the beaker. Furthermore, the specific engaging structure can be constructed as follows: the contour of the lower end face of the pressure cap 5214 is designed according to the curvature of the bottom of a standard beaker, forming a downwardly convex arc surface. This arc surface completely fits the spherical contour of the bottom of the beaker, achieving stable contact over a large area and preventing the beaker from breaking due to excessive local stress. The inner side of the annular water distribution trough, near the center of the pressure cap, is closed, while the outer side, near the edge of the pressure cap, has multiple evenly spaced water outlet holes. The cleaning fluid enters through the water inlet on the side of the pressure cap 5214, flows into the annular water distribution trough through the water inlet channel, and after being evenly distributed in the trough, it flows out from the multiple water outlet holes on the outer side along the side wall of the beaker to assist in rinsing the side wall of the beaker. Finally, all the cleaning fluid flows into the collection tank below under the action of gravity.

[0077] With the above-described design, the lifting cap mechanism 5212, by engaging with the outer bottom of the inverted beaker, effectively secures the beaker during cleaning, preventing displacement or tipping and ensuring the stability of the cleaning operation. Simultaneously, the water tank design inside the cap 5214 allows for targeted cleaning of the beaker's outer bottom, improving the comprehensiveness and efficiency of cleaning and reducing blind spots. Furthermore, the automated lifting and cleaning operation replaces manual hand-held cleaning, reducing the safety risks of operators coming into contact with cleaning fluid and fragile beakers, and improving the overall safety and convenience of the operation.

[0078] In this application, the lifting mechanism 5213 (such as a cylinder) can be precisely controlled by adjusting the cylinder pressure to avoid damaging the beaker.

[0079] Furthermore, the water trough can be constructed as an annular water distribution trough formed on the surface of the pressure cap 5214 that engages with the outer bottom of the beaker.

[0080] In this embodiment, during specific use, when the pressure cap 5214 is engaged with the outer bottom of the beaker, the annular water distribution groove can more effectively clean the outer bottom of the beaker, further improving the comprehensiveness and efficiency of cleaning and reducing cleaning dead spots. Simultaneously, this annular water distribution groove structure ensures uniform water flow during cleaning, avoiding secondary contamination caused by localized water accumulation.

[0081] Furthermore, a collection tank (not shown in the figure) is provided below the first cleaning position 521. The collection tank is used to collect wastewater flowing down from the inverted beaker under the action of gravity.

[0082] In this embodiment, during use, after the inverted beaker completes cleaning at the first cleaning station 521, the wastewater remaining on the surface of the beaker flows downwards naturally under gravity, falling directly into the collection tank below, thus achieving automatic wastewater collection. Cleaning and maintenance of the collection tank are also relatively simple. Operators can periodically pump or pour the wastewater from the collection tank into designated wastewater treatment equipment, while simultaneously rinsing the collection tank to ensure it remains in good working order.

[0083] Through the above-mentioned setup, the liquid collection tank has significant technical benefits. On the one hand, it can effectively prevent environmental pollution caused by the random flow of wastewater, meeting environmental protection requirements. On the other hand, it facilitates the unified treatment of wastewater, reducing the difficulty and cost of sewage treatment.

[0084] Furthermore, it may also include a supplementary drying station located downstream of the first drying station 522, the supplementary drying station being equipped with a supplementary drying device, the nozzles of the supplementary drying device being arranged vertically downwards for targeted air drying of the outer bottom of the beaker.

[0085] In this embodiment, after the beaker completes the initial drying process at the first drying station 522, the flipping feeding mechanism 51 or the transfer mechanism 52 precisely transfers the beaker to a designated position at the supplementary drying station. At this time, the nozzles of the supplementary drying device automatically activate, spraying airflow with specific pressure and temperature vertically downwards to perform targeted air drying on the bottom of the beaker. During the air drying process, the airflow pressure, temperature, and drying time can be flexibly adjusted according to the material and specifications of the beaker and the actual drying requirements to achieve the best drying effect. After air drying is completed, the beaker is transferred by the conveying mechanism to the next process or the unloading position.

[0086] Through the above-described configuration, the embodiments of this application, by setting up a supplementary drying position and its internal supplementary blowing device, perform targeted air drying on the outer bottom of the beaker, effectively solving the problem of incomplete drying of the outer bottom of the beaker in the prior art, and significantly improving the drying quality and efficiency of the beaker. Simultaneously, by flexibly adjusting the airflow parameters, the drying needs of different types of beakers can be met, enhancing the versatility and adaptability of the equipment. Furthermore, the targeted air drying method allows for precise control of the drying area, avoiding energy waste and reducing equipment operating costs.

[0087] In a preferred embodiment, the transfer mechanism 52 may be configured as a multi-station turntable, which includes a turntable drive mechanism and a turntable located at the execution end of the turntable drive mechanism. The turntable is provided with a carrying station (e.g., a first cleaning station 521, a first drying station 522, and a supplementary drying station).

[0088] In this embodiment, during use, the beaker to be processed is flipped and placed on the first cleaning position 521 on the turntable by the flipping feeding mechanism 51. The turntable driving mechanism drives the turntable to rotate, so that the beaker passes through the first cleaning position 521 and the first drying position 522 in sequence. After the cleaning and preliminary drying operations are completed, the turntable continues to rotate, and the processed beaker is transported to the unloading position, where the relevant unloading mechanism removes the beaker.

[0089] In another preferred embodiment, the transfer mechanism 52 may be further configured as a linear module, which includes a linear drive mechanism and a platform located at the execution end of the linear drive mechanism. The platform is provided with a bearing station (e.g., a first cleaning station 521, a first drying station 522, and a supplementary drying station).

[0090] In this embodiment, during use, the beaker to be processed is placed on the first cleaning position 521 of the platform via the flipping feeding mechanism 51. The linear drive mechanism drives the platform to move in a straight line, and the beaker is sequentially transferred to the first cleaning position 521 and the first drying position 522 to complete the corresponding cleaning and drying processes. After the beakers at a set of workstations have been processed, the linear drive mechanism drives the platform to reset, and the operator can remove the processed beakers and replace the beakers to be processed, thus achieving continuous operation.

[0091] In another preferred embodiment, the transfer mechanism 52 can also be a fixed station. Under the control of a six-axis robotic arm, the flipping and feeding mechanism 51 sequentially places the beakers into the respective carrying stations (first cleaning station 521, first drying station 522, and supplementary drying station) on the transfer mechanism 52 to complete the corresponding process.

[0092] Furthermore, the waste liquid quick-change collection module (not shown in the figure) may include: a cabinet located below the experimental platform 101; a pull-out support plate located inside the cabinet, with the waste liquid tank located on the pull-out support plate; and a quick-clamping device located at the top of the cabinet, which is used to press down on the lid of the waste liquid tank.

[0093] In this embodiment, during actual application, the highly toxic waste liquid generated during system operation is uniformly collected into the waste liquid tank through pipelines. The quick-clamp clamping device remains in a depressed and locked state to ensure a tight seal between the tank lid and the opening of the waste liquid tank, preventing the waste liquid from evaporating and leaking. When the liquid level sensor detects that the waste liquid tank has reached the full threshold, the system triggers an alarm to prompt the operator to replace the waste liquid tank. The operator only needs to pull the handle of the quick-clamp clamping device to release the locking state, lift the pressure head upward to make room for operation above the tank lid, and then pull out the pull-out support plate inside the cabinet to remove the waste liquid tank along with the tank lid for replacement. After replacement, push the pull-out support plate back into the cabinet and pull the quick-clamp handle down to the dead position to complete the resealing and locking of the tank lid, restoring the waste liquid collection function.

[0094] With the above-mentioned design, the waste liquid quick-change collection module, through the combination of a pull-out support plate and a quick-clamping device, eliminates the cumbersome operation of traditional waste liquid tank thread locking, significantly shortening the operation time for replacing waste liquid tanks. At the same time, the mechanical dead-point locking structure achieves a reliable seal on the tank lid, effectively avoiding the safety risk of highly toxic waste liquid volatilization and leakage, reducing the probability of operators coming into contact with toxic and harmful media, and improving the safety and ease of operation of the waste liquid collection and replacement process.

[0095] Furthermore, the quick-clamping device may include: a clamping head with a sealing gasket at its bottom; a screw with one end threaded to the cabinet body and the other end having a clamping head; wherein, the clamping head is locked in the dead position by pressing down the quick-clamping handle, and the screw is used to initially adjust the clamping height of the clamping head.

[0096] In this embodiment, during practical application, the initial pressing height of the pressure head is first adjusted by rotating the screw according to the actual height of the waste liquid tank, so that the pressure head can press the tank lid tightly when it is pressed down to the working position to achieve a seal. During normal operation of the system, the quick-clamping device is always in the locked state, and the screw, together with the sealing gasket at the bottom of the pressure head, continuously applies a stable clamping force to the tank lid to ensure the reliability of the seal at the tank opening. When the waste liquid tank needs to be replaced, the operator only needs to pull the quick-clamping operating handle outward to quickly release the screw's locking limit, and simultaneously drive the pressure head to lift off the tank lid. The tank lid can be unlocked without repeatedly turning the threads. After the waste liquid tank is replaced, the quick-clamping handle is pulled back to the locked position to re-seal and fix the tank lid.

[0097] With the above-mentioned design, this quick-clamping device, through the combination of screw and quick-clamp structure, can flexibly adjust the clamping height according to different specifications of waste liquid tanks, adapting to various commonly used waste liquid tank sizes. Furthermore, the quick-clamp operation enables one-button locking and unlocking of the tank lid, avoiding the tedious repeated tightening of traditional threaded locking methods. Simultaneously, the stable clamping force of the screw ensures the reliability of the seal, effectively preventing the volatilization and leakage of highly toxic waste liquids, and improving the efficiency and safety of waste liquid tank replacement.

[0098] In summary, the system features a quick-change waste liquid collection module at the bottom for collecting highly toxic waste liquids (such as acetone and cyanohydrin). The waste liquid tank is placed on a pull-out support plate, with a leak-proof box at the bottom. The tank lid integrates a pipe interface and an ultrasonic level sensor (full liquid alarm). The lid locking mechanism eliminates cumbersome threaded connections, employing a dead-point quick-clamping device (e.g., using MISUMI standard parts).

[0099] In some embodiments, the dead-point quick-lock clamping device may specifically include: a hinged base, a lever arm, an operating handle, and an elastic pressure head; the hinged base is fixedly installed on the lower surface of the top plate of the cabinet, one end of the lever arm is hinged to the hinged base, the other end of the lever arm is fixedly connected to the operating handle, and the elastic pressure head is vertically and adjustablely installed in the middle position of the lever arm; when the waste liquid tank needs to be replaced, the operator pulls the operating handle outward, causing the lever arm to rotate upward around the hinge point, so that the elastic pressure head is lifted completely away from the area above the tank cover, at which time the pull-out support plate can be pulled out from the cabinet for waste liquid tank replacement; after the waste liquid tank is replaced and pushed into the cabinet, the operator pushes the operating handle inward, causing the lever arm to rotate downward around the hinge point, and when the lever arm rotates to the transmission dead point position, the elastic pressure head is locked on the upper surface of the tank cover, and reliable clamping is achieved by utilizing the self-locking characteristic of the dead-point mechanism, without the need for additional thread tightening operation.

[0100] It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions, and although a logical order is shown in the flowchart, in some cases the steps shown or described may be executed in a different order than that shown here.

[0101] Obviously, those skilled in the art should understand that the various units or steps of this application described above can be implemented using general-purpose computing devices. They can be centralized on a single computing device or distributed across a network of multiple computing devices. Optionally, they can be implemented using computer-executable program code, thereby storing them in a storage device for execution by a computing device, or fabricating them separately as individual integrated circuit modules, or fabricating multiple modules or steps into a single integrated circuit module. Thus, this application is not limited to any particular combination of hardware and software.

[0102] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. An automated chemical sample testing system, characterized in that, It includes an experimental platform and a main control system. The experimental platform is equipped with multiple functional modules, and the main control system is communicatively connected to each of the functional modules to coordinate the operation of each functional module. The aforementioned functional modules include: The sample loading and cap opening module includes a sample placement tray, a sample loading robotic arm, and a cap opening station. The sample loading robotic arm is used to pick up the sample bottle on the sample placement tray and move it to the cap opening station. The cap opening station is equipped with a rotating cap opening mechanism. A moisture detection module includes a transfer robotic arm, a syringe assembly, a moisture meter, and a first weighing module. The syringe assembly is equipped with syringes of different capacities, and the transfer robotic arm is used to grip the syringes and transfer them between the moisture meter and the first weighing module. The pretreatment liquid separation module includes a negative pressure liquid separation needle, an interactive robotic arm and a second weighing module. The interactive robotic arm is used to grip the negative pressure liquid separation needle to separate the liquid in the sample bottle into a beaker. The titration and pH detection module includes a reagent addition station, a titrator, a pH detection station, and a three-dimensional moving module. The reagent addition station is used to pre-place the beaker. The lower end of the three-dimensional moving module integrates a stirring paddle, a pH electrode, a waste liquid extraction pipe, and a cleaning spray pipe. A beaker cleaning and drying module includes a flipping and feeding mechanism and a transfer mechanism. The flipping and feeding mechanism is used to pick up a beaker and flip it so that the beaker is in an inverted position with the mouth of the beaker facing down. The transfer mechanism is provided with a first cleaning position and a first drying position in sequence. The waste liquid quick-change collection module includes a waste liquid tank with an openable and closed lid.

2. The automated chemical sample detection system according to claim 1, characterized in that, The syringe assembly is provided with a first volume syringe and a second volume syringe, wherein the capacity of the first volume syringe is smaller than that of the second volume syringe, and a compatible sleeve is provided on the outside of the first volume syringe, the outer diameter of the compatible sleeve being the same as that of the second volume syringe.

3. The automated chemical sample detection system according to claim 1, characterized in that, The moisture meter is equipped with an automatic tilting cap mechanism for opening and closing the injection port, the automatic tilting cap mechanism comprising: A drive cylinder is mounted on the experimental platform or the moisture meter. A rotating bracket is located at the actuating end of the drive cylinder, and a rubber plug is provided at the end of the rotating bracket; The drive cylinder is used to drive the rotating bracket to rotate so that the rubber stopper seals or opens the injection port of the moisture meter.

4. The automated chemical sample detection system according to claim 1, characterized in that, The negative pressure dispensing needle has a single-channel internal cavity structure and a sealing mechanism at the top. The sealing mechanism is used to seal the connection with the negative pressure pipeline of the negative pressure system. The negative pressure dispensing needle is used to draw up the sample and inject it into the beaker by drawing negative pressure.

5. The automated chemical sample detection system according to claim 1 or 4, characterized in that, The pretreatment separation module further includes a parallel cleaning workstation, which includes: The cleaning station includes a second cleaning station and a second drying station; The cleaning robotic arm is used to pick up the negative pressure dispensing needle after liquid separation and move it sequentially into the second cleaning position and the second drying position.

6. The automated chemical sample detection system according to claim 1, characterized in that, The pH detection station includes at least a detection station, a third cleaning station, a storage station, and a multi-point calibration station. The detection station, the third cleaning station, the storage station, and the multi-point calibration station are all located within the movement range of the three-dimensional moving module.

7. The automated chemical sample detection system according to claim 1, characterized in that, The first cleaning station includes a cleaning nozzle at the bottom and a lifting and pressing mechanism above the cleaning nozzle. The cleaning nozzle is used to spray cleaning liquid upward to clean the inner cavity of the beaker. The lifting and pressing mechanism is used to move up and down above the beaker to meet and disengage from the bottom of the beaker. The bottom of the first drying station is provided with a hot air output device with a vertically upward air outlet. The hot air output device is used to blow hot air from bottom to top into the inner cavity of the inverted beaker.

8. The automated chemical sample detection system according to claim 7, characterized in that, The lifting and pressing mechanism includes a lifting mechanism and a pressing cap disposed at the execution end of the lifting mechanism. The lower end face of the pressing cap is engaged with the outer bottom of the inverted beaker, and a water tank is provided inside the pressing cap.

9. The automated chemical sample detection system according to claim 1, characterized in that, The waste liquid quick-change collection module includes: The cabinet is located below the experimental table; A pull-out support plate is provided in the cabinet body, and the waste liquid tank is provided on the pull-out support plate. A quick-release clamping device is located at the top of the cabinet and is used to press down on the lid of the waste liquid tank.

10. The automated chemical sample detection system according to claim 9, characterized in that, The quick-clamping device includes: The pressure head has a sealing gasket at its bottom; The screw has one end threadedly connected to the cabinet body and the other end equipped with the pressure head; The pressure head is locked in the dead position by pressing down the quick-release handle, and the screw is used to initially adjust the pressing height of the pressure head.

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