Automatic liquefaction sample separation system

Abstract

The invention belongs to the field of material separation, particularly relates to an automatic liquefaction sample separation system, and aims to solve the problem that the prior art mainly depends on manual operation. The device comprises a drying oven assembly, a manipulator, a camera shooting module, a weighing platform, a dismounting assembly, a material receiving assembly, a placing plate switching assembly, an annular air knife assembly, a liquid nitrogen cup liquid adding mechanism, a material recycling assembly and a liquid nitrogen generator mechanism, and through full-automatic operation, the risk that operators directly make contact with hazardous substances such as gaseous compounds is remarkably reduced; the system integrates a plurality of modules of oven heating, automatic sample separation, manipulator grabbing, sample recovery and the like, so that the sample separation process is highly automatic, the operation efficiency is greatly improved, and compared with traditional manual operation, the sample separation period can be remarkably shortened, the operation steps are reduced, and the overall production efficiency is improved.

Description

Technical Field

[0001] The present invention belongs to the field of material separation, and particularly relates to an automatic liquefaction sampling system. Background Art

[0002] Gas compounds are important chemical fuels and are widely used in the enrichment of isotopes. In a closed container at room temperature, some gas compounds exist in a state of coexistence of gas and solid. When the container is heated to about 93 degrees Celsius, the solid compound is converted into a liquid. The chemical properties of these gas compounds are extremely active, and when exposed to air, they will quickly react with water vapor to form substances with strong corrosiveness and high toxicity.

[0003] The isotope abundance in gas compounds is a key parameter of chemical fuels, and at the same time, the impurity content directly characterizes the quality of the material. The detection process of abundance and impurities usually involves heating the container filled with the material to be analyzed, and then separating it into multiple sampling filling containers and bent containers for analysis. However, the existing separation technologies mainly rely on manual operation, and there are significant deficiencies, including low safety factor, high labor intensity, high material loss, poor operation accuracy, low automation level, insufficient recovery of residual substances, and high environmental pollution risks. These problems not only seriously threaten the safety of operators, but also lead to low processing efficiency and insufficient accuracy of sample separation. Therefore, there is an urgent need to develop an integrated automatic liquefaction sampling device to improve the overall performance of the processing technology. Summary of the Invention

[0004] To solve the problem of mainly relying on manual operation in the prior art, the present invention provides an automatic liquefaction sampling system, including an oven assembly, a manipulator, a camera photographing module, a weighing platform, a disassembly and assembly assembly, a material receiving assembly, a placement plate switching assembly, an annular air knife assembly, a liquid nitrogen cup filling mechanism, a material recovery assembly, and a liquid nitrogen generator mechanism. The specific sampling process at least includes the following steps: S1. Place the sampling filling container to be sampled on the buffer table, start the oven assembly to heat up the oven, and start the external liquid nitrogen generator; S2. The manipulator grabs the sampling filling container, scans and identifies the container coding data through the camera photographing module, the weighing platform records the weight of the empty bottle, and the disassembly and assembly assembly performs the operations of opening the lid and removing the gasket; S3. The material receiving assembly moves the sampling filling container to the filling connection port of the oven assembly; S4. Use a vacuum pump to extract the sampling pipeline and the sampling filling container to reach a preset value, heat up the inside of the oven to fully liquefy the material, open the valve of the material container, and fill the metering tube with the liquefied material; S5. Open the valve of the metering tube, and the liquefied material in the metering tube flows into the sampling filling container; S6. The manipulator grabs the liquid nitrogen cup to the liquid nitrogen cup filling mechanism to complete the liquid nitrogen filling. The liquid nitrogen cup enters the oven with the material receiving assembly, and the sub-sampling and filling container containing the received sub-sampled material is frozen with liquid nitrogen. S7. After the liquid nitrogen freezing is completed, start the vacuum pump to extract the residual liquid in the internal pipeline of the oven assembly and recycle it to the material recovery assembly. S8. The material receiving assembly transfers the sub-sampling and filling container and the liquid nitrogen cup to the post-treatment station, and the annular air knife assembly blows the condensate on the surface of the sub-sampling and filling container and accelerates the warming. S9. The manipulator grabs the sub-sampling and filling container to the disassembly and assembly assembly to perform capping. S10. The weighing platform records the full bottle weight, the camera photographing module scans the code to record the coding data, and binds the quality data with the coding data. After the data recording is completed, the manipulator puts the sub-sampling and filling container back to the buffer position.

[0005] An automatic liquefied sub-sampling system according to some embodiments of the present application, the oven assembly includes a material container, a container support, a metering tube, an automatic sub-sampling valve, a manual sub-sampling valve, a filling connection port, a manual sampler and a pressing member; The material container is communicated with the upstream port of the metering tube, and the downstream port of the metering tube is respectively communicated with the filling connection port and the manual sampler through the automatic sub-sampling valve and the manual sub-sampling valve; The pressing member is arranged on one side close to the filling connection port.

[0006] An automatic liquefied sub-sampling system according to some embodiments of the present application, the manipulator includes an upper support fixing seat, a robot arm body, a powerful jaw cylinder and a compatible cylinder jaw; One end of the robot arm body is fixed on the upper support fixing seat, and the other end of the robot arm body is connected to the compatible cylinder jaw through the powerful jaw cylinder.

[0007] An automatic liquefied sub-sampling system according to some embodiments of the present application, the camera photographing module includes a camera support, a camera mounting seat, a camera, a light source mounting plate and a light source; The camera mounting seat is fixedly arranged at one end of the camera support and is fixedly connected to the camera, and the light source mounting plate is fixedly connected to the light source and is arranged corresponding to the camera.

[0008] An automatic liquefied sub-sampling system according to some embodiments of the present application, the weighing platform includes a sub-sampling and filling container, a container placement table, a weighing scale and a scale fixing base; The scale fixing base is fixedly provided with the weighing scale, the weighing scale is provided with a container placement table, and the sub-sampling and filling container can be placed on the container placement table.

[0009] An automatic liquefaction sampling system provided according to some embodiments of the present application, the disassembly and assembly assembly includes a lifting motor, a lifting module, a module mounting frame, a vacuum pressure gauge, a filter, an opening motor, a torque sensor, a rotating sleeve, and a vacuum suction cup; The lifting motor is in transmission connection with the lifting module, the lifting module, the vacuum pressure gauge, and the filter are all arranged on the module mounting frame, an opening motor is arranged on the lifting module, an output end of the opening motor is in transmission connection with the rotating sleeve, the torque sensor is arranged between the opening motor and the rotating sleeve, the vacuum suction cup is arranged close to the rotating sleeve, the vacuum suction cup is communicated with the filter, and the vacuum pressure gauge can monitor the vacuum degree when the vacuum suction cup works.

[0010] An automatic liquefaction sampling system provided according to some embodiments of the present application, the material receiving assembly includes a mounting base plate, a first vacuum cup, a second vacuum cup, a material receiving assembly transfer module, and a lifting cylinder; The mounting base plate is fixedly arranged on the frame of the equipment, a material receiving assembly transfer module is arranged on the mounting base plate, at least two lifting cylinders are arranged on the material receiving assembly transfer module, the lifting cylinders can move along the axial direction of the material receiving assembly transfer module, and the first vacuum cup and the second vacuum cup are respectively arranged on the two lifting cylinders.

[0011] An automatic liquefaction sampling system provided according to some embodiments of the present application, the placing plate switching assembly includes a receiving plate gripper, a clamping cylinder, and a switching cylinder; The clamping cylinder is connected to the receiving plate gripper and controls the opening and closing of the receiving plate gripper, and the switching cylinder can drive the receiving plate gripper and the received plate held by it to perform horizontal displacement.

[0012] An automatic liquefaction sampling system provided according to some embodiments of the present application, the liquid nitrogen cup filling mechanism includes a liquid level sensor, a liquid nitrogen filling pipe, a liquid nitrogen overflow tray, a sensor lifting cylinder, and a vacuum cup holder; The sensor lifting cylinder is connected to the liquid level sensor and drives it to perform vertical lifting movement, the liquid nitrogen filling pipe communicates an external liquid nitrogen generator with the vacuum cup, and the vacuum cup holder for fixing the vacuum cup is arranged on the liquid nitrogen overflow tray.

[0013] An automatic liquefaction sampling system provided according to some embodiments of the present application, the material recovery assembly includes a pre-stage recovery container, a post-stage recovery container, an artificial liquid nitrogen filling funnel, a recovery container frame, and a recovery container liquid nitrogen cup; At least two liquid nitrogen cups of the recovery containers are arranged in the recovery container rack. The pre-stage recovery container and the post-stage recovery container are respectively communicated with the two liquid nitrogen cups of the recovery containers, and the manual liquid nitrogen filling funnel is communicated with the pre-stage recovery container.

[0014] Advantages of the present invention: Through fully automated operation, the system significantly reduces the risk of operators directly contacting hazardous substances such as gas compounds.

[0015] By adopting multiple automated control modules, including automatic liquid nitrogen filling, liquid level control, and automatic weighing and registration of samples, the high-precision execution of each step is ensured. Especially through the precise control of the metering tube and sensors, the accurate dispensing of liquid compounds is achieved, ensuring that the dispensing amount of the sample in the sample filling container meets the predetermined standard and improving the reliability of the test results.

[0016] The system integrates multiple modules such as oven heating, automatic sample splitting, robot gripping, and sample recovery, making the sample splitting process highly automated, thus greatly improving the operation efficiency. Compared with traditional manual operation, it can significantly shorten the sample splitting cycle, reduce operation steps, and improve the overall production efficiency.

[0017] By precisely controlling the operation of the sample splitting valve and the metering tube, the present invention can effectively reduce material waste. At the same time, the material recovery component configured in the system can recover residual samples, further reducing material loss and lowering production costs.

[0018] The fully enclosed design and automated operation of the system reduce the contact between liquid compounds and the outside world, reducing the risk of harmful gas leakage. Especially the efficient recovery function of the material recovery component ensures the safe treatment of residual substances and reduces the possibility of environmental pollution.

[0019] Multiple sensors in the system, including liquid level sensors, torque sensors, and sleeve detection sensors, etc., ensure the accuracy of each operation step. Especially the application of the torque sensor during the process of opening and closing the lid not only ensures the correct closing of the bottle stopper but also prevents damage to the bottle body caused by excessive force.

[0020] The automated system greatly reduces the frequency and intensity of manual operations. Through the cooperation of the robot and automated modules, operators only need to monitor and maintain the system, significantly reducing the labor intensity.

[0021] The system adopts a modular design, and each component operates independently, facilitating maintenance and upgrading. According to actual needs, each module can be adjusted and replaced to adapt to different types of sample splitting requirements, with good scalability and adaptability. Description of the Drawings

[0022] Other features, objectives, and advantages of the present application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 is an overall schematic diagram of an automatic liquefaction sub-sampling system according to some embodiments of the present application; Figure 2 is a schematic diagram of an oven assembly according to some embodiments of the present application; Figure 3 is a schematic diagram of a manipulator according to some embodiments of the present application; Figure 4 is a schematic diagram of a camera photographing module according to some embodiments of the present application; Figure 5 is a schematic diagram of a weighing platform according to some embodiments of the present application; Figure 6 is a schematic diagram of a disassembly and assembly assembly according to some embodiments of the present application; Figure 7 is a schematic diagram of a material receiving assembly according to some embodiments of the present application; Figure 8 is a schematic diagram of a placement plate switching assembly according to some embodiments of the present application; Figure 9 is a schematic diagram of an annular air knife assembly according to some embodiments of the present application; Figure 10 is a schematic diagram of a liquid nitrogen cup liquid adding mechanism according to some embodiments of the present application; Figure 11 is a schematic diagram of a material recovery assembly according to some embodiments of the present application.

[0023] In the figure: 1. Oven assembly; 101. Material container; 102. Container support; 103. Quantitative tube; 104. Automatic sub-sampling valve; 105. Manual sub-sampling valve; 106. Filling connection port; 107. Manual sampler; 108. Compression member; 2. Manipulator; 201. Upper support fixing seat; 202. Robot arm body; 203. Strong jaw cylinder; 204. Compatible cylinder jaw; 3. Camera photographing module; 301. Camera support; 302. Camera mounting seat; 303. Camera; 304. Light source mounting plate; 305. Light source; 4. Weighing platform; 401. Sub-sampling filling container; 402. Container placement table; 403. Weighing balance; 404. Balance fixing base; 5. Disassembly and assembly assembly; 501. Lifting motor; 502. Lifting module; 503. Module mounting frame; 504. Vacuum pressure gauge; 505. Filter; 506. Open cover motor; 507. Torque sensor; 508. Rotating sleeve; 509. Vacuum chuck; 6. Material Receiving Assembly; 601. Installation Base Plate; 602. First Vacuum Cup; 603. Second Vacuum Cup; 604. Material Receiving Assembly Transfer Module; 605. Motion Drag Chain Bracket; 606. Lifting Cylinder 7. Placement Plate Switching Assembly; 701. Material Receiving Plate Claw; 702. Clamping Cylinder; 703. Oven Hole Plugging Plate; 704. Switching Cylinder; 705. Drag Chain 8. Annular Air Knife Assembly; 801. Air Knife Bracket; 802. Annular Air Knife 9. Liquid Nitrogen Cup Liquid Filling Mechanism; 901. Liquid Level Sensor; 902. Liquid Nitrogen Filling Pipe; 903. Liquid Nitrogen Overflow Tray; 904. Sensor Lifting Cylinder; 905. Vacuum Cup Support 10. Material Recycling Assembly; 1001. Front - stage Recycling Container; 1002. Rear - stage Recycling Container; 1003. Manual Liquid Nitrogen Filling Funnel; 1004. Recycling Container Rack; 1005. Recycling Container Liquid Nitrogen Cup 11. Liquid Nitrogen Generator Mechanism Detailed Embodiment

[0024] The following further elaborates on the present application in conjunction with the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the relevant invention and do not limit the invention. Additionally, it should be noted that for ease of description, only parts related to the relevant invention are shown in the drawings.

[0025] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The following will elaborate on the present application in detail with reference to the drawings and embodiments.

[0026] As Figures 1 to 11 shown, the present invention provides an automatic liquefaction and sampling system, including an oven assembly 1, a manipulator 2, a camera photographing module 3, a weighing platform 4, a disassembly and assembly assembly 5, a material receiving assembly 6, a placement plate switching assembly 7, an annular air knife assembly 8, a liquid nitrogen cup liquid filling mechanism 9, a material recycling assembly 10, and a liquid nitrogen generator mechanism 11. The specific sampling process at least includes the following steps: S1. Place the sampling and filling container to be sampled on the buffer table, start the oven assembly 1 to heat up the oven, and start the external liquid nitrogen generator; S2. The manipulator 2 grabs the sampling and filling container, scans and identifies the container coding data through the camera photographing module 3, the weighing platform 4 records the weight of the empty bottle, and the disassembly and assembly assembly 5 performs the operations of opening the lid and removing the gasket; S3. The material receiving assembly 6 moves the sampling and filling container to the filling connection port 106 of the oven assembly 1; S4. Use a vacuum pump to extract the sub-sampling pipeline and the sub-sampling filling container until a preset value is reached. Heat up the inside of the oven to fully liquefy the material, and open the valve of the material container 101 to fill the metering tube 103 with the liquefied material. S5. Open the valve of the metering tube 103, and the liquefied material in the metering tube 103 flows into the sub-sampling filling container. S6. The manipulator 2 grabs the liquid nitrogen cup to the liquid nitrogen cup filling mechanism 9 to complete the liquid nitrogen filling. The liquid nitrogen cup enters the oven with the material receiving assembly 6 to freeze the sub-sampling filling container that has received the sub-sampled material with liquid nitrogen. S7. After the liquid nitrogen freezing is completed, start the vacuum pump to extract the residual liquid in the internal pipeline of the oven assembly 1 and recycle it to the material recovery assembly 10. S8. The material receiving assembly 6 transfers the sub-sampling filling container and the liquid nitrogen cup to the post-treatment station, and the annular air knife assembly 8 blows the condensation on the surface of the sub-sampling filling container and accelerates the warming. S9. The manipulator 2 grabs the sub-sampling filling container to the disassembly and assembly assembly 5 to perform capping. S10. The weighing platform 4 records the full bottle weight, the camera photographing module 3 scans the code to record the coding data, and binds the quality data with the coding data. After completing the data recording, the manipulator 2 places the sub-sampling filling container back to the buffer position.

[0027] During specific implementation, the container support 102 installs the material container 101 to be sub-sampled upside down inside the oven, and places the sub-sampling filling container 401 to be sub-sampled on the buffer table. Subsequently, start the oven assembly 1 to control the temperature rise of the oven, and start the external liquid nitrogen generator mechanism 11 to prepare for the subsequent liquid nitrogen freezing link.

[0028] The manipulator 2 grabs the sub-sampling filling container 401 from the buffer table, uses the camera photographing module 3 to scan and identify the container coding data, records the empty bottle weight through the weighing platform 4, and uses the disassembly and assembly assembly 5 to perform the operations of opening the lid and removing the gasket.

[0029] The material receiving assembly 6 carries the pre-treated sub-sampling filling container 401, moves and precisely docks with the filling connection port 106 of the oven assembly 1.

[0030] The system opens the valve, and the external vacuum pump continuously evacuates the system pipeline to ensure that the inside of the sub-sampling pipeline and the sub-sampling filling container 401 reaches the preset vacuum requirement. At the same time, the temperature inside the oven needs to reach the temperature rise requirement to ensure that the material is fully liquefied. After the vacuum and temperature conditions are met, open the valve of the material container 101, and the liquefied material fills the metering tube 103 under the action of gravity.

[0031] Open the valve of the metering tube 103, and the pre-metered liquefied material in the metering tube 103 flows precisely into the sub-sampling filling container 401 under the action of gravity to complete the quantitative sub-sampling of the material.

[0032] The manipulator 2 grabs the liquid nitrogen cup to the liquid nitrogen cup filling mechanism 9 for liquid nitrogen filling. After the filling is completed, the liquid nitrogen cup enters the oven with the material receiving assembly 6, and the sub-sampling and filling container 401 that has received the sub-sampled material is frozen with liquid nitrogen to quickly freeze the sample.

[0033] After the liquid nitrogen freezing is completed, the system closes the valve and starts the external vacuum pump to extract the residual liquid from the internal pipeline of the oven assembly 1, and the residual material in the pipeline is recovered to the material recovery assembly 10.

[0034] The material receiving assembly 6 carries the sub-sampling and filling container 401 and the liquid nitrogen cup to the post-treatment station. Subsequently, the annular air knife assembly 8 blows and warms the sub-sampling and filling container 401 to remove the condensation on the surface of the container and accelerate the warming.

[0035] The manipulator 2 transfers the sub-sampling and filling container 401 to the mobile disassembly and assembly assembly 5 for lid closing operation.

[0036] The weighing platform 4 records the full bottle weight again, the camera photographing module 3 scans the code again, records the coded data, and binds the quality data with the coded data. After the data recording is completed, the manipulator 2 places the sub-sampling and filling container 401 back to the buffer position.

[0037] In some embodiments, the oven assembly 1 includes a material container 101, a container support 102, a metering tube 103, an automatic sub-sampling valve 104, a manual sub-sampling valve 105, a filling connection port 106, a manual sampler 107, and a pressing member 108; The material container 101 is communicated with the upstream port of the metering tube 103. The downstream ports of the metering tube 103 are respectively communicated with the filling connection port 106 and the manual sampler 107 through the automatic sub-sampling valve 104 and the manual sub-sampling valve 105, and the pressing member 108 is arranged on one side close to the filling connection port 106.

[0038] During specific implementation, such as Figure 2As shown, the oven assembly 1 is used to perform material sampling operations in a constant temperature environment. The material container 101 is used as a storage container for the material to be sampled. It is located at the top center of the entire assembly and is inverted and fixed on the internal structure of the constant temperature box through a container bracket 102 to ensure that the material container remains stable in a high temperature environment and facilitates the gravity flow of liquid materials. The manual opening and closing of the valve controls the material to flow into the pipeline; the quantitative tube 103 is used to accurately control the volume of the sampled material. It is composed of three stainless steel sleeve tubes arranged side by side. Different pipelines can be switched through a three-way conversion joint to achieve quantitative measurement of different volumes. The upstream of the quantitative tube 103 is connected to the material through a pipeline. The outlet of the material container 101 is connected, and the downstream is connected to the automatic sampling valve 104 and the manual sampling valve 105 respectively; the automatic sampling valve 104 is a pneumatic valve, which automatically opens and closes according to the preset program to realize the automatic control of the sampling operation; the manual sampling valve 105 can realize the manual control of the sampling operation of the manual sampler 107, as a supplement or backup for the automatic sampling valve 104; the filling connection port 106 is used to connect the filling and sampling filling container, and transmit the sampled material; the clamping piece 108 is an automatic sampling container clamping device, and the structure adopts a ferrule-type pipe joint to ensure the sealing and firmness of the pipeline connection. All these components are installed in the thermostat. During the sampling preparation process, the temperature of the thermostat needs to be set to 120°C and the material container 101 is installed. After the material is heated and liquefied, the sampling work can be carried out.

[0039] In some embodiments, the robot 2 includes an upper support fixing base 201, a robot arm body 202, a strong gripper cylinder 203 and a compatible cylinder gripper 204; One end of the robot arm body 202 is fixed on the upper support fixing seat 201 , and the other end of the robot arm body 202 is connected to the compatible cylinder clamp 204 through a strong clamp cylinder 203 .

[0040] When implementing it, Figure 3As shown, the manipulator 2 can efficiently, stably, and reliably complete operations such as automatic grasping, transferring, and placing of the liquid nitrogen cup and the sub-sampling filling container 401. The upper support fixing base 201, as a key execution unit of the automatic sub-sampling system, is firmly anchored to the top of the system; the robotic arm body 202, as the core driving unit, is a multi-joint precision robotic arm that can flexibly extend and rotate in the automatic sub-sampling room to accurately reach the target position; the end of the arm is rigidly connected to the powerful gripper cylinder 203, which is the direct power source for realizing the clamping action and can output a strong clamping force to ensure the grasping and stable handling of the sub-sampling filling container and the liquid nitrogen cup containing liquid nitrogen; the compatible cylinder gripper 204 is customized to adapt to the shape characteristics of the two different types of containers, namely the liquid nitrogen cup and the sub-sampling filling container. Its mechanism is integrated with a magnetic switch that can intelligently sense the type of the currently grasped container, thereby providing necessary feedback to the control system to achieve intelligent compatible grasping and safe clamping of different containers.

[0041] In some embodiments, the camera photographing module 3 includes a camera bracket 301, a camera mounting base 302, a camera 303, a light source mounting plate 304, and a light source 305; The camera mounting base 302 is fixedly arranged at one end of the camera bracket 301 and is fixedly connected to the camera 303. The light source mounting plate 304 is fixedly connected to the light source 305 and is correspondingly arranged with the camera 303.

[0042] During specific implementation, as Figure 4 shown, the camera photographing module 3 can accurately register the coding data on the sub-sampling filling container and combine it with the data of the quality weighing component to realize the binding of quality and number information, providing key information for subsequent data traceability and quality management. The camera bracket 301 is firmly fixed to the frame of the sub-sampling system by bolts and serves as the support framework for the entire camera photographing module. The column part is reserved with mounting holes or guide rail structures for connecting and adjusting the positions of the camera mounting base 302 and the light source mounting plate 304. The camera mounting base 302 is the mounting platform for the camera 303 and can be adjusted forward and backward along the guide rod of the camera bracket 301 to precisely control the distance and angle between the camera and the object to be photographed. The camera 303 is an image acquisition component for photographing the coding data on the sub-sampling filling container, and the light source 305 provides illumination for the camera photographing to ensure the image quality.

[0043] In some embodiments, the weighing platform 4 includes a sub-sampling filling container 401, a container placement table 402, a weighing scale 403, and a scale fixed base 404; The scale fixed base 404 is fixedly provided with the weighing scale 403. The weighing scale 403 is provided with the container placement table 402, and the sub-sampling filling container 401 can be placed on the container placement table 402.

[0044] When implementing it, Figure 5 As shown, the weighing platform 4 can record the weight of the empty bottle of the sampling and filling container 401 before opening the cover and the weight of the full bottle after filling, so as to calculate the mass of the sampled material. All weighing data will be output and saved to the computer for subsequent analysis and tracking. The sampling and filling container 401 is the object to be weighed, and is used to hold the material to be sampled. Before and after sampling, the sampling and filling container 401 is placed on a weighing platform, and the weight change before and after filling is weighed to accurately calculate the mass of the sampled material. The container placement table 402 provides a stable and horizontal placement space for the sampling and filling container 401 to ensure that the container remains stable during the weighing process to avoid affecting the weighing accuracy due to tilting or shaking. The weighing balance 403 is a high-precision electronic balance, which is used to accurately measure the mass of the sampling and filling container 401 and output the weighing data (connected to the computer system) for data transmission and recording. The balance fixed base 404 fixes the entire weighing platform to the automatic liquefaction sampling workbench by bolts, providing a stable basic support for the entire weighing platform and reducing the impact of external vibration on the weighing balance 403.

[0045] In some embodiments, the disassembly assembly 5 includes a lifting motor 501, a lifting module 502, a module mounting frame 503, a vacuum pressure gauge 504, a filter 505, a cover opening motor 506, a torque sensor 507, a rotating sleeve 508, and a vacuum suction cup 509; The lifting motor 501 is connected to the lifting module 502 in transmission. The lifting module 502, the vacuum pressure gauge 504 and the filter 505 are all arranged on the module mounting frame 503. The lifting module 502 is provided with a cover opening motor 506. The output end of the cover opening motor 506 is connected to the rotating sleeve 508 in transmission. The torque sensor 507 is arranged between the cover opening motor 506 and the rotating sleeve 508. The vacuum suction cup 509 is arranged close to the rotating sleeve 508. The vacuum suction cup 509 is connected to the filter 505. The vacuum pressure gauge 504 can monitor the vacuum degree of the vacuum suction cup 509 when it is working.

[0046] When implementing it, Figure 6As shown, the disassembly and assembly assembly 5 has two core functions: one is to realize the automatic opening and closing of the sample splitting and filling container lid and reliably hold the bottle stopper during the opening process; the other is to use vacuum adsorption technology to accurately take out and place the gasket inside the sample splitting and filling container. The lifting motor 501 is located at the top of the entire disassembly and assembly assembly. Its component is a servo motor, which serves as the power source for the vertical movement of the disassembly and assembly assembly. The lifting module 502 consists of a guide rail, a slider, and a lead screw, which converts the rotational movement of the lifting motor 501 into a linear lifting movement and provides stable vertical guidance and support. The module mounting frame 503 serves as the support frame of the entire disassembly and assembly assembly, provides a stable structural support, and fixes the disassembly and assembly assembly to the sample splitting system operation table. The vacuum pressure gauge 504 is used to monitor the vacuum degree in real time when the vacuum chuck 509 adsorbs the gasket, providing feedback information on the vacuum state of the system. The filter 505 is used to filter the gas entering the vacuum chuck 509, preventing impurities such as dust and particulate matter from entering the vacuum system, protecting the vacuum generator and the chuck, extending the service life of the vacuum system, and ensuring the reliability of the adsorption effect. The opening motor 506 is a servo motor that provides rotational power to drive the rotating sleeve 508 to perform rotational movement, realizing the opening and tightening operations of the sample splitting and filling container lid. The torque sensor 507 is installed between the opening motor 506 and the rotating sleeve 508, used to detect the torque value in real time during the opening and closing processes, and can accurately measure the torque force received by the rotating sleeve and feed the torque data back to the control system to achieve precise control and monitoring of the torque, preventing the lid from being over-tightened or under-tightened. The rotating sleeve 508 is the execution component for the opening and closing operations. Its inner cavity shape matches the outer shape of the sample splitting and filling container lid. By meshing with the lid, the rotational torque of the opening motor 506 is transmitted to the lid to realize the opening and tightening of the lid. The vacuum chuck 509 can adsorb and grab the gasket inside the sample splitting and filling container. It generates negative pressure through a vacuum generator to adsorb the surface of the gasket, realizing the stable grasping and transfer of the gasket.

[0047] In some embodiments, the material receiving assembly 6 includes a mounting base plate 601, a first vacuum cup 602, a second vacuum cup 603, a material receiving component transfer module 604, and a lifting cylinder 606; The mounting base plate 601 is fixedly arranged on the frame of the equipment. The mounting base plate 601 is provided with a material receiving component transfer module 604. The material receiving component transfer module 604 is provided with at least two lifting cylinders 606. The lifting cylinders 606 can move along the axis direction of the material receiving component transfer module 604. The first vacuum cup 602 and the second vacuum cup 603 are respectively arranged on the two lifting cylinders 606.

[0048] During specific implementation, such as Figure 7As shown in the figure, the material receiving assembly 6 plays a connecting role in the overall equipment. Through this component, the movement of the sample dividing and filling container between the oven assembly 1 and the fume hood component is realized. The mounting base plate 601 is usually fixed to the equipment rack by bolts and serves as the mounting base for the entire material receiving assembly, providing a flat and stable mounting platform for fixing other components. The first vacuum cup 602 is used to transfer the empty cup sample dividing and filling container, and the second vacuum cup 603 is used to transfer the sample dividing and filling container that has been filled. The material receiving component transfer module 604 is the horizontal movement actuator of the material receiving assembly, realizing the reciprocating movement of the first vacuum cup 602 and the second vacuum cup 603 in the horizontal direction, thereby transferring the sample dividing and filling container between different workstations. The moving drag chain support 605 is used to support and guide the moving drag chain, protecting the cables and pipelines inside the drag chain and preventing the cables and pipelines from being entangled, worn or broken during movement. The design of the moving drag chain support 605 needs to ensure the smoothness and reliability of the drag chain movement and extend the service life of the cables and pipelines. The lifting cylinder 606 can independently provide vertical lifting movement for the first vacuum cup 602 and the second vacuum cup 603, realizing the lifting and placing operations of the container.

[0049] In some embodiments, the placement plate switching assembly 7 includes a material receiving plate gripper 701, a clamping cylinder 702, and a switching cylinder 704; The clamping cylinder 702 is connected to the material receiving plate gripper 701 and controls the opening and closing of the material receiving plate gripper 701. The switching cylinder 704 can drive the material receiving plate gripper 701 and the clamped material receiving plate to perform horizontal displacement.

[0050] During specific implementation, as Figure 8 shown in the figure, the main function of the placement plate switching assembly 7 is to optimize the sample dividing process, reduce the operation frequency of the manipulator 2, and realize the synchronous and efficient operation of multiple actions. Its core role is to quickly switch the positions of the first vacuum cup 602 and the second vacuum cup 603 on the material receiving assembly 6 after the sample dividing and filling container completes the lid closing action. At the same time, in order to maintain the tightness of the oven environment, this component is also responsible for operating the oven hole plugging plate 703 to complete the sealing of the oven opening. The material receiving plate gripper 701 is a grasping mechanism for clamping and fixing the material receiving plate. The clamping cylinder 702 is a pneumatic component for controlling the opening and closing of the material receiving plate gripper 701, which can quickly respond to control signals and provide reliable clamping force to ensure the fixation of the material receiving plate during the switching process. The oven hole plugging plate 703 is used to seal the outflow port of the oven material filling pipeline and maintain the pipeline vacuum. The switching cylinder 704 provides linear movement in the horizontal direction for the placement plate switching assembly 7, driving the material receiving plate gripper 701 and the clamped material receiving plate to perform horizontal displacement, thereby realizing the position switching of the first vacuum cup 602 and the second vacuum cup 603. The drag chain 705 is used to protect and guide the cables and pipelines connected to the moving parts of the placement plate switching assembly 7, preventing the cables and pipelines from being entangled, worn or broken during movement.

[0051] The annular air knife assembly 8 includes an air knife support 801 and an annular air knife 802. As Figure 9 shown, after the sample splitting and filling container completes the liquid nitrogen immersion sample splitting operation, the annular air knife assembly 8 quickly removes the condensation formed on the surface of the sample splitting and filling container due to low temperature by purging compressed air, and accelerates the temperature of the container to rise back to the normal temperature state, thereby ensuring the dryness of the container surface, providing guarantee for the subsequent accurate mass weighing link, and improving the accuracy of the weighing data. The air knife support 801 is a supporting and fixing structure for the annular air knife 802. Its bottom is firmly fixed on the tabletop of the sample splitting system through a flange and bolt fasteners, and has sufficient strength and stability to support the annular air knife and resist the vibration generated by the air flow; the annular air knife 802 can evenly inject compressed air inward to conduct a full-round purge on the surface of the sample splitting and filling container located at its center, effectively removing the condensation and moisture on the container surface, and accelerating the temperature rise of the container.

[0052] In some embodiments, the liquid nitrogen cup filling mechanism 9 includes a liquid level sensor 901, a liquid nitrogen filling pipe 902, a liquid nitrogen overflow tray 903, a sensor lifting cylinder 904, and a vacuum cup holder 905; The sensor lifting cylinder 904 is connected to the liquid level sensor 901 and drives it to perform vertical lifting movement. The liquid nitrogen filling pipe 902 communicates with an external liquid nitrogen generator and the vacuum cup. The vacuum cup holder 905 for fixing the vacuum cup is arranged on the liquid nitrogen overflow tray 903.

[0053] During specific implementation, as Figure 10As shown, the liquid nitrogen cup filling mechanism 9 can provide accurate and safe liquid nitrogen filling operation for the first vacuum cup 602 and the second vacuum cup 603. To ensure the accuracy of the liquid level during the filling process, the system is provided with a liquid level sensor 901 above the liquid nitrogen cup to detect the liquid level height in real time. When the liquid nitrogen level reaches a preset height threshold, the sensor signal will trigger the cryogenic deep-cold valve (not shown in the figure) to close immediately and stop filling. To further enhance safety and prevent the liquid level sensor 901 from malfunctioning and causing excessive filling of liquid nitrogen, the system is also specially configured with a liquid nitrogen overflow tray 903 to receive the liquid nitrogen that may overflow, and a second liquid nitrogen sensor is additionally provided at the bottom of the overflow tray to detect overflow. Once liquid nitrogen overflow is detected, the second sensor will serve as a backup safety mechanism to trigger the cryogenic deep-cold valve to close again, doubly ensuring the safety and accuracy of the filling process. The liquid level sensor 901 is a liquid level detection element, which is used to accurately measure the liquid level height of the liquid nitrogen in the vacuum cup; the liquid nitrogen filling pipe 902 is a channel for liquid nitrogen transportation, which accurately introduces liquid nitrogen from an external liquid nitrogen generator into the vacuum cup; the liquid nitrogen overflow plate 903 is a safety protection device, which is used to receive the overflowed liquid nitrogen that may occur during the liquid nitrogen filling process to prevent liquid nitrogen from splashing out and causing safety hazards or equipment damage; the sensor lifting cylinder 904 drives the liquid level sensor 901 to perform vertical lifting movement to achieve rapid switching and precise positioning of the liquid level sensor at different heights; the vacuum cup holder 905 is a carrying and positioning device for the vacuum cup, which is used to stably fix the vacuum cup, ensure that the vacuum cup is accurately positioned during the liquid nitrogen filling process, prevent tipping or shaking, and ensure the smooth progress of the liquid filling process and the accuracy of liquid level detection.

[0054] In some embodiments, the material recovery assembly 10 includes a front-stage recovery container 1001, a rear-stage recovery container 1002, an artificial liquid nitrogen filling funnel 1003, a recovery container rack 1004, and a recovery container liquid nitrogen cup 1005; At least two recovery container liquid nitrogen cups 1005 are arranged in the recovery container rack 1004 , the front-stage recovery container 1001 and the rear-stage recovery container 1002 are respectively connected to the two recovery container liquid nitrogen cups 1005 , and the artificial liquid nitrogen filling funnel 1003 is connected to the front-stage recovery container 1001 .

[0055] When implementing it, Figure 11As shown, the material recovery component 10 can safely and efficiently collect the residual materials in the system pipeline after the sub-sampling is completed, realizing the effective recovery of materials and the cleaning of the system. This device adopts a dual-container design, including a pre-stage recovery container 1001 and a post-stage recovery container 1002. Their mechanical structures are basically the same. The pre-stage recovery container 1001 is mainly used to recover the product liquid in the pipeline, while the post-stage recovery container 1002 serves as a backup and safety guarantee to prevent accidental leakage of the product liquid or gas. The pre-stage recovery container 1001 is the main material recovery container, used to collect the residual product liquid in the sub-sampling system pipeline. The post-stage recovery container 1002 is a secondary safety recovery container, used to further capture a small amount of materials that may overflow from the pre-stage recovery container 1001, providing double protection to prevent accidental leakage of materials into the environment. The manual liquid nitrogen filling funnel 1003 facilitates the operator to manually add liquid nitrogen into the liquid nitrogen cup 1005 of the recovery container, replenish the loss of liquid nitrogen, maintain the liquid level height of the liquid nitrogen in the liquid nitrogen cup, and ensure that the recovery container is always in a low-temperature cooling state. The recovery container rack 1004 serves as the support frame of the entire material recovery component, providing a stable structural support for installing and fixing other components. The recovery container liquid nitrogen cup 1005 is of Dewar flask structure to hold liquid nitrogen and provide a low-temperature cooling environment for the pre-stage recovery container 1001 and the post-stage recovery container 1002 placed therein.

[0056] In the description of the present invention, the terms indicating directions or positional relationships such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings. This is only for convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0057] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installation", "connection", "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0058] The term "comprising" or any other similar term is intended to cover non-exclusive inclusion, so that a process, method, article or device / equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or also includes the elements inherent in these processes, methods, articles or devices / equipment.

[0059] So far, the technical solution of the present invention has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easily understood by those skilled in the art that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. An automatic liquefaction sampling system, characterized in that: It includes an oven assembly, a manipulator, a camera module, a weighing platform, a disassembly assembly, a material receiving assembly, a placement plate switching assembly, an annular air knife assembly, a liquid nitrogen cup filling mechanism, a material recovery assembly and a liquid nitrogen generator mechanism. The specific sampling process includes at least the following steps: S1. Place the sample filling container to be sampled on the buffer table, start the oven assembly to heat the oven, and start the external liquid nitrogen generator; S2, the robot grabs the sample filling container, scans the code to identify the container code data through the camera module, the weighing platform records the weight of the empty bottle, and the disassembly assembly performs the lid opening and gasket removal; S3, the material receiving assembly moves the sample filling container to the filling connection port of the oven assembly; S4. The sample distribution pipeline and the sample distribution filling container are drawn by a vacuum pump and reach a preset value. The temperature inside the oven is raised to fully liquefy the material. The valve of the material container is opened to allow the liquefied material to fill the quantitative tube; S5. Open the valve of the quantitative tube, and the liquefied material in the quantitative tube flows into the sampling and filling container; S6. The manipulator grabs the liquid nitrogen cup to the liquid nitrogen cup filling mechanism to complete the liquid nitrogen filling. The liquid nitrogen cup enters the oven along with the material receiving assembly to freeze the sample filling container that has received the sampled material with liquid nitrogen. S7, after the liquid nitrogen freezing is completed, the vacuum pump is started to extract the residual liquid in the internal pipeline of the oven component and recover it to the material recovery component; S8. The material receiving assembly carries the sample filling container and the liquid nitrogen cup to the post-processing station, and the annular air knife assembly blows away the condensation on the surface of the sample filling container and accelerates the temperature recovery; S9, the robot grabs the sample filling container and moves it to the disassembly assembly to close the cover; S10, the weighing platform records the weight of the full bottle, the camera module scans the code to record the coded data, and binds the quality data to the coded data. After completing the data recording, the robot puts the sample filling container back to the cache position.

2. The automatic liquefaction sample separation system according to claim 1, characterized in that: The oven assembly includes a material container, a container support, a quantitative tube, an automatic sampling valve, a manual sampling valve, a filling connection port, a manual sampler and a pressing piece; The material container is communicated with the upstream port of the quantitative tube, and the downstream port of the quantitative tube is communicated with the filling connection port and the manual sampler respectively through the automatic sampling valve and the manual sampling valve; The pressing member is arranged at a side close to the filling connection port.

3. The automatic liquefaction sample separation system according to claim 2, characterized in that: The manipulator comprises an upper support fixing seat, a robot arm body, a strong gripper cylinder and a compatible cylinder gripper; One end of the robot arm body is fixed on the upper support fixing seat, and the other end of the robot arm body is connected to the compatible cylinder clamp through the strong clamp cylinder.

4. The automatic liquefaction sample separation system according to claim 3, characterized in that: The camera shooting module comprises a camera bracket, a camera mounting seat, a camera, a light source mounting plate and a light source; The camera mounting seat is fixedly disposed at one end of the camera bracket and is fixedly connected to the camera, and the light source mounting plate is fixedly connected to the light source and is disposed corresponding to the camera.

5. The automatic liquefaction sample separation system according to claim 4, characterized in that: The weighing platform includes a sample filling container, a container placement table, a weighing balance and a balance fixing base; The weighing balance is fixedly arranged on the balance fixing base, and a container placing table is arranged on the weighing balance, and the sample dividing and filling container can be placed on the container placing table.

6. The automatic liquefaction sample separation system according to claim 5, characterized in that: The disassembly and assembly assembly includes a lifting motor, a lifting module, a module mounting frame, a vacuum pressure gauge, a filter, a cover opening motor, a torque sensor, a rotating sleeve, and a vacuum suction cup; The lifting motor is transmission connected to the lifting module, the lifting module, the vacuum pressure gauge and the filter are all arranged on the module mounting frame, the lifting module is provided with a cover opening motor, the output end of the cover opening motor is transmission connected to the rotating sleeve, the torque sensor is arranged between the cover opening motor and the rotating sleeve, the vacuum suction cup is arranged close to the rotating sleeve, the vacuum suction cup is connected to the filter, and the vacuum pressure gauge can monitor the vacuum degree of the vacuum suction cup when it is working.

7. The automatic liquefaction sample separation system according to claim 6, characterized in that: The material receiving assembly includes a mounting base plate, a first vacuum cup, a second vacuum cup, a material receiving assembly transfer module, and a lifting cylinder; The mounting base plate is fixedly arranged on the frame of the equipment, and a material receiving assembly transfer module is arranged on the mounting base plate. At least two lifting cylinders are arranged on the material receiving assembly transfer module, and the lifting cylinders can move along the axial direction of the material receiving assembly transfer module. The first vacuum cup and the second vacuum cup are respectively arranged on the two lifting cylinders.

8. The automatic liquefaction sample separation system according to claim 7, characterized in that: The placement plate switching assembly includes a receiving plate clamp, a clamping cylinder, and a switching cylinder; The clamping cylinder is connected to the material receiving plate clamping jaw and controls the opening and closing of the material receiving plate clamping jaw. The switching cylinder can drive the material receiving plate clamping jaw and the clamped material receiving plate to perform horizontal displacement.

9. The automatic liquefaction sample separation system according to claim 8, characterized in that: The liquid nitrogen cup filling mechanism includes a liquid level sensor, a liquid nitrogen filling pipe, a liquid nitrogen overflow plate, a sensor lifting cylinder, and a vacuum cup holder; The sensor lifting cylinder is connected to the liquid level sensor and drives it to perform vertical lifting movement. The liquid nitrogen filling pipe is connected to the external liquid nitrogen generator and the vacuum cup. The vacuum cup holder for fixing the vacuum cup is arranged on the liquid nitrogen overflow plate.

10. An automatic liquefaction sample separation system according to any one of claims 1 to 9, characterized in that: The material recovery component includes a front-stage recovery container, a rear-stage recovery container, an artificial liquid nitrogen filling funnel, a recovery container rack, and a recovery container liquid nitrogen cup; At least two recovery container liquid nitrogen cups are arranged in the recovery container rack, the front-stage recovery container and the rear-stage recovery container are respectively connected to the two recovery container liquid nitrogen cups, and the artificial liquid nitrogen filling funnel is connected to the front-stage recovery container.

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