A fully automatic liquid-liquid extraction and nitrogen blowing combined instrument

Abstract

The utility model discloses a kind of full-automatic liquid-liquid extraction nitrogen blowing combined instrument, the utility model relates to the technical field of detecting instrument, and it include: extraction instrument, the extraction instrument includes extraction mechanism, stirring mechanism, liquid delivery mechanism and visual detection mechanism;The extraction mechanism includes extraction bottle, first concentration bottle and sample disc, the extraction bottle and the first concentration bottle are placed in the sample disc;The stirring mechanism includes magnetic stirring part, magnetic drive part and stirring motor, the magnetic stirring part is used to place in the extraction bottle;The liquid delivery mechanism includes liquid delivery pipe and multi-pass injection pump, the liquid delivery pipe is connected with the multi-pass injection pump;Nitrogen blowing instrument, the nitrogen blowing instrument includes concentration rack, liquid injection mechanism, liquid adding mechanism, nitrogen blowing mechanism and heating mechanism.The utility model can improve detection efficiency, reduce manual intervention, reduce the risk of sample cross-contamination.

Description

Technical Field

[0001] This utility model relates to the field of detection instrument technology, and in particular to a fully automatic liquid-liquid extraction and nitrogen blowing combined instrument. Background Technology

[0002] In fields such as water quality testing, environmental monitoring, and food safety, liquid-liquid extraction is a crucial step in sample pretreatment, while nitrogen blowing concentration is an essential step before subsequent testing. Currently, traditional liquid-liquid extraction and nitrogen blowing concentration are usually performed by two separate devices, or require manual sample transfer for subsequent processing. This separate operation method is not only inefficient and time-consuming, but also prone to cross-contamination or sample loss during sample transfer, affecting the accuracy of test results. In addition, existing equipment has a low degree of automation, requiring a large amount of manual intervention, increasing the labor intensity and safety risks for operators. Utility Model Content

[0003] This invention provides a fully automated liquid-liquid extraction and nitrogen blowing combined instrument, which can improve detection efficiency, reduce manual intervention, and lower the risk of sample cross-contamination.

[0004] To solve the above-mentioned technical problems, this utility model provides a fully automated liquid-liquid extraction and nitrogen blowing combined instrument, comprising: An extraction apparatus includes an extraction mechanism, a stirring mechanism, a liquid delivery mechanism, and a visual inspection mechanism. The extraction mechanism includes an extraction flask, a first concentration flask, and a sample tray, with both the extraction flask and the first concentration flask placed in the sample tray. The stirring mechanism includes a magnetic stirrer, a magnetic drive, and a stirring motor. The magnetic stirrer is placed in the extraction flask, and the magnetic drive is connected to the stirring motor to drive the magnetic stirrer to rotate. The liquid delivery mechanism includes a liquid delivery pipe and a multi-port syringe pump, with the liquid delivery pipe connected to the multi-port syringe pump for delivering extraction solvent and / or sample. The visual inspection mechanism is used to identify the liquid state within the multi-port syringe pump. A nitrogen purging apparatus includes a concentration rack, a liquid injection mechanism, a liquid addition mechanism, a nitrogen purging mechanism, and a heating mechanism. The concentration rack is used to hold a second concentration bottle. The liquid injection mechanism is used to inject liquid into the second concentration bottle and is connected to a multi-port injection pump. The liquid addition mechanism is used to add extraction solvent to the second concentration bottle. The nitrogen purging mechanism is used to concentrate the liquid in the second concentration bottle by purging it with nitrogen. The heating mechanism is used to heat the second concentration bottle.

[0005] As a preferred embodiment of the above technical solution, the multi-port syringe pump includes a multi-port rotary valve and a syringe, and the visual inspection mechanism includes a camera and an illumination source. The camera is used to acquire images of the liquid inside the syringe, and the illumination source illuminates the syringe.

[0006] As a preferred embodiment of the above technical solution, the liquid delivery mechanism further includes a lifting robotic arm, which is positioned above the sample tray. The liquid delivery pipe is mounted on the lifting robotic arm, and a liquid level detection needle is also mounted on the lifting robotic arm. The lifting robotic arm can drive the liquid delivery pipe and the liquid level detection needle to move up and down relative to the sample tray.

[0007] As a preferred embodiment of the above technical solution, the extractor further includes a draining mechanism, which includes a rotating robotic arm and a draining tank. The rotating robotic arm is provided with a draining port, which is connected to the multi-port injection pump. The rotating robotic arm can drive the draining port to move above the draining tank and above the sample tray.

[0008] As a preferred embodiment of the above technical solution, the injection mechanism includes an injection track and an injection arm. The injection arm is used to hold the injection needle tube, which is connected to the multi-port injection pump. The injection arm moves along the injection track to move the injection needle tube above the second concentration bottle.

[0009] As a preferred embodiment of the above technical solution, the liquid addition mechanism includes a liquid addition track and a liquid addition arm. The liquid addition arm is provided with a liquid addition nozzle, which is connected to the multi-port injection pump. The liquid addition arm moves along the liquid addition track to move the liquid addition nozzle above the second concentration bottle.

[0010] As a preferred embodiment of the above technical solution, the nitrogen blowing device further includes a liquid level sensor, which is used to detect the liquid level height in the second concentration bottle.

[0011] As a preferred embodiment of the above technical solution, the nitrogen blowing mechanism includes a nitrogen blowing pipe and a blowing pipe mounting frame. The blowing pipe mounting frame is used to install the nitrogen blowing pipe and is rotatably mounted on the frame of the nitrogen blowing instrument to adjust the blowing angle of the nitrogen blowing pipe.

[0012] As a preferred embodiment of the above technical solution, the heating mechanism includes a heating shell and a heating element. The heating shell has several receiving holes, the second concentration bottle is inserted into the receiving holes, and the heating element is disposed inside the heating shell.

[0013] As a preferred embodiment of the above technical solution, the nitrogen blowing device further includes a drain seat, the injection arm moves along the injection track to move the injection needle above the drain seat, and the filling arm moves along the filling track to move the filling nozzle above the drain seat.

[0014] This invention provides a fully automated liquid-liquid extraction and nitrogen blowing combined instrument, comprising an extractor and a nitrogen blowing device. The extractor includes an extraction mechanism, a stirring mechanism, a liquid delivery mechanism, and a visual inspection mechanism. The nitrogen blowing device includes a concentration rack, a liquid injection mechanism, a liquid addition mechanism, a nitrogen blowing mechanism, and a heating mechanism. During testing, the liquid to be tested is placed in the extraction bottle. An extraction solvent is drawn into the extraction bottle by a multi-port syringe pump and injected. The mixture is stirred by the stirring mechanism, and the multi-port syringe pump draws the mixed liquid into itself. After extraction is complete, the visual inspection mechanism identifies the liquid state and stratification within the multi-port syringe pump. The extracted liquid is then transferred to a second concentration bottle via the liquid injection mechanism. The nitrogen blowing mechanism concentrates the extract in the second concentration bottle using nitrogen blowing. The heating mechanism heats the second concentration bottle to accelerate solvent evaporation, completing the sample concentration process. During concentration, other solvents can also be injected into the second concentration bottle via the liquid addition mechanism to achieve solvent displacement, thereby further improving extraction efficiency and concentration effect. The extraction and nitrogen blowing processes are fully automated and continuous, requiring no manual intervention. This effectively improves detection efficiency, reduces the risk of errors caused by manual operation, and ensures the accuracy and consistency of the detection results. Furthermore, a first concentration bottle can be placed in the sample tray, and the multi-port syringe pump can transfer the extracted liquid into the first concentration bottle. The first concentration bottle can then be manually removed for further processing, accommodating both manual and fully automated detection needs and enhancing the instrument's applicability and flexibility.

[0015] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model, it can be implemented according to the contents of the specification. In order to make the above and other objects, features and advantages of this utility model more easy to understand, specific embodiments of this utility model are given below. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of a fully automated liquid-liquid extraction and nitrogen blowing combined instrument according to an embodiment of the present invention; Figure 2 This is a three-dimensional structural diagram of the extraction instrument in an embodiment of the present utility model; Figure 3 This is a three-dimensional structural schematic diagram of the extraction instrument in an embodiment of the present invention from another perspective; Figure 4This is a schematic diagram of the extraction bottle in an embodiment of the present invention; Figure 5 This is a three-dimensional structural diagram of the nitrogen blowing device in an embodiment of this utility model; Figure 6 This is a schematic diagram of the liquid level sensor installation structure of the nitrogen blowing device in this embodiment of the present invention; Figure 7 This is a three-dimensional structural diagram of the internal structure of the nitrogen blowing device in the embodiment of this utility model; Figure 8 This is a schematic diagram of the internal structure of the nitrogen blowing device in the embodiment of this utility model; In the diagram: 1. Extractor; 2. Extraction mechanism; 3. Stirring mechanism; 4. Liquid delivery mechanism; 5. Visual inspection mechanism; 6. Nitrogen blower; 7. Concentration rack; 8. Injection mechanism; 9. Liquid addition mechanism; 10. Nitrogen blowing mechanism; 11. Heating mechanism; 12. Drainage mechanism; 201. Extraction flask; 202. First concentration flask; 203. Sample tray; 301. Magnetic stirrer; 302. Magnetic drive; 303. Stirring motor; 401. Liquid delivery pipe; 402. Multi-port syringe pump; 403. Multi-port rotary valve ; 404, Syringe; 405, Lifting robotic arm; 406, Liquid level detection needle; 501, Camera; 502, Light source; 601, Liquid level sensor; 602, Drainage seat; 701, Second concentration bottle; 801, Injection track; 802, Injection arm; 901, Liquid filling track; 902, Liquid filling arm; 1001, Nitrogen blowpipe; 1002, Blowpipe mounting bracket; 1101, Heating housing; 1102, Heating element; 1201, Rotating robotic arm; 1202, Drainage tank; 1203, Drainage port. Detailed Implementation

[0017] To make the objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0018] See Figures 1 to 8 This utility model provides a fully automated liquid-liquid extraction and nitrogen blowing combined instrument, including: An extraction apparatus 1 includes an extraction mechanism 2, a stirring mechanism 3, a liquid delivery mechanism 4, and a visual inspection mechanism 5. The extraction mechanism 2 includes an extraction bottle 201, a first concentration bottle 202, and a sample tray 203, with both the extraction bottle 201 and the first concentration bottle 202 placed in the sample tray 203. The stirring mechanism 3 includes a magnetic stirrer 301, a magnetic drive 302, and a stirring motor 303. The magnetic stirrer 301 is placed in the extraction bottle 201, and the magnetic drive 302 is connected to the stirring motor 303, driving the magnetic stirrer 301 to rotate. The liquid delivery mechanism 4 includes a liquid delivery pipe 401 and a multi-port syringe pump 402, connected to the multi-port syringe pump 402 for delivering extraction solvent and / or sample. The visual inspection mechanism 5 identifies the liquid state within the multi-port syringe pump 402. The nitrogen purging device 6 includes a concentration placement rack 7, a liquid injection mechanism 8, a liquid addition mechanism 9, a nitrogen purging mechanism 10, and a heating mechanism 11. The concentration placement rack 7 is used to place a second concentration bottle 701. The liquid injection mechanism 8 is used to inject liquid into the second concentration bottle 701 and is connected to the multi-port injection pump 402. The liquid addition mechanism 9 is used to add extraction solvent into the second concentration bottle 701. The nitrogen purging mechanism 10 is used to purge and concentrate the liquid in the second concentration bottle 701 with nitrogen. The heating mechanism 11 is used to heat the second concentration bottle 701.

[0019] This utility model provides a fully automated liquid-liquid extraction and nitrogen blowing combined instrument, including an extractor 1 and a nitrogen blowing device 6. The extractor 1 includes an extraction mechanism 2, a stirring mechanism 3, a liquid delivery mechanism 4, and a visual inspection mechanism 5. The nitrogen blowing device 6 includes a concentration rack 7, a liquid injection mechanism 8, a liquid addition mechanism 9, a nitrogen blowing mechanism 10, and a heating mechanism 11. During testing, the liquid to be tested is placed in the extraction bottle 201. The extraction solvent is drawn into the extraction bottle 201 by the multi-port syringe pump 402 and injected into the extraction bottle 201. The stirring mechanism 3 mixes the solvent, and the multi-port syringe pump 402 draws the mixed liquid into itself. After extraction is complete, the visual inspection mechanism 5 identifies the liquid state and stratification within the multi-port syringe pump 402. Subsequently, the extracted liquid is transferred to the second concentration bottle 701 through the liquid injection mechanism 8. The nitrogen blowing mechanism 10 concentrates the extract in the second concentration bottle 701 using nitrogen blowing. The heating mechanism 11 heats the second concentration bottle 701 to accelerate solvent evaporation, completing the sample concentration process. During the concentration process, other solvents can be injected into the second concentration bottle 701 through the liquid addition mechanism 9 to achieve solvent replacement, thereby further improving the extraction efficiency and concentration effect. The extraction and nitrogen blowing processes are fully automatic and continuous, requiring no manual intervention, effectively improving detection efficiency, reducing the risk of errors caused by manual operation, and ensuring the accuracy and consistency of detection results. In addition, the first concentration bottle 202 can be placed in the sample tray 203, and the multi-port syringe pump 402 can transfer the extracted liquid into the first concentration bottle 202. Subsequently, the first concentration bottle 202 can be manually removed for further processing, which can meet the needs of both manual and fully automatic detection, improving the applicability and flexibility of the instrument.

[0020] In a further embodiment of this invention, the multi-port syringe pump 402 includes a multi-port rotary valve 403 and a syringe 404, and the visual inspection mechanism 5 includes a camera 501 and an illumination source 502. The camera 501 is used to acquire images of the liquid inside the syringe 404, and the illumination source 502 illuminates the syringe 404.

[0021] In this embodiment, the multi-port rotary valve 403 has multiple flow channel interfaces, which are respectively connected to the extraction bottle 201, the first concentration bottle 202, the second concentration bottle 701, and the external extraction solvent bottle through several liquid delivery pipes 401 to realize the extraction, transfer, and distribution of liquid. The syringe 404 is connected to the multi-port rotary valve 403 and is used to extract or discharge liquid when the multi-port rotary valve 403 is switched. The illumination source 502 illuminates the syringe 404 so that the camera 501 can clearly capture the liquid layering image inside the syringe 404 under illumination conditions, thereby accurately determining whether the liquid has layered and the volume of each phase, thus providing data support for subsequent liquid separation operations and ensuring the accuracy of extract transfer. Specifically, the syringe 404 draws the mixed liquid in the extraction bottle 201 into the syringe 404 through the multi-port rotary valve 403. After settling and stratification, the camera 501 captures an image of the syringe 404 and controls the multi-port rotary valve 403 to switch the flow channel based on the image recognition result, discharging the lower or upper layer of extract into the second concentration bottle 701 or the first concentration bottle 202 for subsequent nitrogen blowing concentration or manual sampling and analysis.

[0022] In a further embodiment of this invention, the liquid delivery mechanism 4 further includes a lifting mechanical arm 405, which is disposed above the sample tray 203. The liquid delivery pipe 401 is disposed on the lifting mechanical arm 405, and a liquid level detection needle 406 is also disposed on the lifting mechanical arm 405. The lifting mechanical arm 405 can drive the liquid delivery pipe 401 and the liquid level detection needle 406 to move up and down relative to the sample tray 203.

[0023] In this embodiment, the sample tray 203 is rotatable and has multiple accommodating positions for placing the extraction bottle 201 and the first concentration bottle 202. During testing, the sample tray 203 rotates to move the extraction bottle 201 containing the liquid to be tested below the liquid level probe 406. The lifting robotic arm 405 lowers the liquid level probe 406 into the extraction bottle 201 to detect the liquid level height inside the bottle. The extraction bottle 201 is a standard glass container with uniform specifications. By detecting the liquid level height and combining it with the inner diameter parameter of the extraction bottle 201, the volume of the liquid inside the bottle can be calculated. Then, the lifting robotic arm 405 raises the liquid level probe 406 back to its original position. Subsequently, the sample tray 203 rotates to move the extraction bottle 201 containing the liquid to be tested below the first concentration bottle 202. The extraction bottle 201 is moved below the liquid delivery tube 401. The lifting robotic arm 405 lowers the liquid delivery tube 401 into the extraction bottle 201. Based on the previously calculated liquid volume, the liquid delivery mechanism 4 controls the multi-port syringe pump 402 to draw an appropriate amount of extract and inject it into the extraction bottle 201. The lifting robotic arm 405 then raises the liquid delivery tube 401 back to its original position. After the stirring mechanism 3 completes the mixing, the lifting robotic arm 405 lowers the liquid delivery tube 401 into the extraction bottle 201 again to draw out the mixture and transfer it to the syringe 404. Subsequently, the multi-port rotary valve 403 switches the flow channel to discharge the extract into the first concentration bottle 202 or the second concentration bottle 701. By setting the liquid level probe 406 to detect the liquid level height, the volume of liquid in the extraction bottle 201 can be accurately determined, thereby controlling the multi-port syringe pump 402 to extract an appropriate amount of extractant to extract the sample, avoiding reagent waste or insufficient extraction, and improving the automation and accuracy of the extraction process.

[0024] In a further embodiment of this invention, the extraction instrument 1 further includes a draining mechanism 12, which includes a rotating robotic arm 1201 and a draining tank 1202. The rotating robotic arm 1201 is provided with a draining port 1203, which is connected to the multi-port injection pump 402. The rotating robotic arm 1201 can drive the draining port 1203 to move above the draining tank 1202 and above the sample tray 203.

[0025] In this embodiment, when a draining operation is required, the rotary robotic arm 1201 moves the drain port 1203 above the drain tank 1202. The drain port 1203 is connected to the multi-port syringe pump 402 via a pipeline (not shown in the figure) to discharge the waste liquid in the multi-port syringe pump 402 into the drain tank 1202. When a cleaning operation is required, the rotary robotic arm 1201 moves the drain port 1203 above the sample tray 203 to inject the cleaning solution into the extraction bottle 201 or the first concentration bottle 202, thereby achieving automatic cleaning of the containers. By setting the draining mechanism 12, centralized discharge of waste liquid and automatic cleaning of containers can be achieved, avoiding the tediousness of manual operation and the risk of cross-contamination, further improving the safety and environmental friendliness of equipment operation.

[0026] In a further embodiment of this invention, the injection mechanism 8 includes an injection track 801 and an injection arm 802. The injection arm 802 is used to hold an injection needle tube (not shown in the figure). The injection needle tube is connected to the multi-port injection pump 402. The injection arm 802 moves along the injection track 801 to move the injection needle tube above the second concentration bottle 701.

[0027] In this embodiment, the concentration placement rack 7 is provided with several positions for placing the second concentration bottle 701. The injection arm 802 moves along the injection track 801, driving the clamped injection needle to align with the target position. The injection needle (not shown in the figure) is connected to the multi-port injection pump 402 through a pipeline (not shown in the figure) to inject the liquid delivered by the multi-port injection pump 402 into the second concentration bottle 701 to complete the concentration step after extraction, ensuring that the sample can smoothly enter the nitrogen blowing concentration stage. The nitrogen blowing device 6 also includes a funnel placement rack for placing a sand core funnel. The sand core funnel is located above the second concentration bottle 701 and contains anhydrous copper sulfate to dehydrate the extract injected into the second concentration bottle 701, removing water and preventing water from affecting the subsequent nitrogen blowing concentration effect and the accuracy of the test results. A sand core funnel is also provided above the first concentration bottle 202 for dehydrating the extract injected into the first concentration bottle 202.

[0028] In a further embodiment of this invention, the liquid addition mechanism 9 includes a liquid addition track 901 and a liquid addition arm 902. The liquid addition arm 902 is provided with a liquid addition nozzle, which is connected to the multi-port injection pump 402. The liquid addition arm 902 moves along the liquid addition track 901 to move the liquid addition nozzle above the second concentration bottle 701.

[0029] In this embodiment, during nitrogen blowing concentration, if it is necessary to inject other solvents into the second concentration bottle 701, the dispensing arm 902 moves along the dispensing track 901, causing the clamped dispensing nozzle to align with the target bottle position. The multi-port syringe pump 402 draws in the other solvents and injects them into the second concentration bottle 701 to achieve solvent replacement, thereby further improving extraction efficiency and concentration effect. The dispensing nozzle is located above the second concentration bottle 701. The dispensing nozzle can uniformly spray other solvents into the bottle in the form of mist or liquid stream, avoiding direct impact on the liquid surface that could cause sample splashing or loss, while also facilitating thorough mixing of the solvent and the sample to be concentrated.

[0030] In a further embodiment of this invention, the nitrogen evaporator 6 further includes a liquid level sensor 601, which is used to detect the liquid level height in the second concentration bottle 701.

[0031] In this embodiment, the liquid level sensor 601 is located near the bottom of the second concentration bottle 701 to monitor the liquid level changes in the second concentration bottle 701 in real time. It is used to detect whether concentration is complete. When the liquid level reaches a preset threshold, it sends a signal to the control system. The control system then controls the nitrogen blowing mechanism 10 to stop working based on the received signal, thereby automatically determining the concentration endpoint, preventing over-concentration or drying of the sample, and ensuring the accuracy and reproducibility of the experimental results.

[0032] In a further embodiment of this invention, the nitrogen blowing mechanism 10 includes a nitrogen blowing pipe 1001 and a blowing pipe mounting bracket 1002. The blowing pipe mounting bracket 1002 is used to mount the nitrogen blowing pipe 1001. The blowing pipe mounting bracket 1002 is rotatably mounted on the frame of the nitrogen blowing instrument 6 to adjust the blowing angle of the nitrogen blowing pipe 1001.

[0033] In this embodiment, the blowpipe mounting bracket 1002 is rotatably mounted on the frame of the nitrogen evaporator 6. A knob is provided at the end of the blowpipe mounting bracket 1002. Rotating the knob causes the blowpipe mounting bracket 1002 to rotate, thereby adjusting the tilt angle of the nitrogen blowpipe 1001 relative to the second concentration bottle 701. This allows the nitrogen blowing flow to act more effectively on the center of the liquid surface, improving nitrogen blowing efficiency and reducing solvent residue. The lower end of the nitrogen blowpipe 1001 extends into the second concentration bottle 701 and is located above the liquid surface. The nitrogen blowpipe 1001 is connected to an external nitrogen source for introducing nitrogen into the second concentration bottle 701. The nitrogen flow is used to purge the surface of the extract, accelerating solvent evaporation and achieving rapid concentration.

[0034] In a further embodiment of this invention, the heating mechanism 11 includes a heating housing 1101 and a heating element 1102. The heating housing 1101 has a plurality of receiving holes, the second concentration bottle 701 is inserted into the receiving holes, and the heating element 1102 is disposed inside the heating housing 1101.

[0035] In this embodiment, when the second concentration bottle 701 is inserted into the receiving hole, the heating element 1102 is located at the bottom of the second concentration bottle 701, thereby heating the bottom of the second concentration bottle 701, heating the sample inside the bottle, accelerating the evaporation of the solvent, and shortening the concentration time. The heating element 1102 can be a heating wire, a heating block, or an infrared heating tube, etc.

[0036] In a further embodiment of this invention, the nitrogen blowing device 6 further includes a drain seat 602, the injection arm 802 moves along the injection track 801 to move the injection needle above the drain seat 602, and the filling arm 902 moves along the filling track 901 to move the filling nozzle above the drain seat 602.

[0037] In this embodiment, by setting the drain seat 602, the injection needle and the liquid filling nozzle can be easily cleaned or waste liquid can be discharged, avoiding cross-contamination and improving the automation level and ease of use of the equipment.

[0038] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. Furthermore, the described specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of those different embodiments or examples.

[0039] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0040] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A fully automated liquid-liquid extraction and nitrogen blowing combined instrument, characterized in that, include: An extraction apparatus, comprising an extraction mechanism, a stirring mechanism, a liquid delivery mechanism, and a visual inspection mechanism; The extraction mechanism includes an extraction bottle, a first concentration bottle, and a sample tray, with both the extraction bottle and the first concentration bottle placed in the sample tray. The stirring mechanism includes a magnetic stirrer, a magnetic drive, and a stirring motor. The magnetic stirrer is placed in the extraction bottle, and the magnetic drive is connected to the stirring motor to drive the magnetic stirrer to rotate. The liquid delivery mechanism includes a liquid delivery pipe and a multi-port syringe pump, with the liquid delivery pipe connected to the multi-port syringe pump for delivering extraction solvent and / or sample. The visual inspection mechanism is used to identify the liquid state within the multi-port syringe pump. A nitrogen purging apparatus includes a concentration rack, a liquid injection mechanism, a liquid addition mechanism, a nitrogen purging mechanism, and a heating mechanism. The concentration rack is used to hold a second concentration bottle. The liquid injection mechanism is used to inject liquid into the second concentration bottle and is connected to a multi-port injection pump. The liquid addition mechanism is used to add extraction solvent to the second concentration bottle. The nitrogen purging mechanism is used to concentrate the liquid in the second concentration bottle by purging it with nitrogen. The heating mechanism is used to heat the second concentration bottle.

2. The fully automated liquid-liquid extraction and nitrogen blowing combined instrument according to claim 1, characterized in that, The multi-port syringe pump includes a multi-port rotary valve and a syringe. The visual inspection mechanism includes a camera and an illumination source. The camera is used to capture images of the liquid inside the syringe, and the illumination source illuminates the syringe.

3. The fully automated liquid-liquid extraction and nitrogen blowing combined instrument according to claim 1, characterized in that, The liquid delivery mechanism also includes a lifting robotic arm, which is positioned above the sample tray. The liquid delivery pipe is mounted on the lifting robotic arm, and a liquid level detection needle is mounted on the lifting robotic arm. The lifting robotic arm can drive the liquid delivery pipe and the liquid level detection needle to move up and down relative to the sample tray.

4. The fully automated liquid-liquid extraction and nitrogen blowing combined apparatus according to claim 3, characterized in that, The extraction instrument also includes a draining mechanism, which includes a rotating robotic arm and a draining tank. The rotating robotic arm is provided with a draining port, which is connected to the multi-port injection pump. The rotating robotic arm can drive the draining port to move above the draining tank and above the sample tray.

5. The fully automated liquid-liquid extraction and nitrogen blowing combined instrument according to claim 1, characterized in that, The injection mechanism includes an injection track and an injection arm. The injection arm is used to hold the injection needle tube, which is connected to the multi-port injection pump. The injection arm moves along the injection track to move the injection needle tube above the second concentration bottle.

6. The fully automated liquid-liquid extraction and nitrogen blowing combined apparatus according to claim 5, characterized in that, The liquid dispensing mechanism includes a liquid dispensing track and a liquid dispensing arm. The liquid dispensing arm is equipped with a liquid dispensing nozzle, which is connected to the multi-port injection pump. The liquid dispensing arm moves along the liquid dispensing track to move the liquid dispensing nozzle above the second concentration bottle.

7. The fully automated liquid-liquid extraction and nitrogen blowing combined apparatus according to claim 1, characterized in that, The nitrogen evaporator also includes a liquid level sensor, which is used to detect the liquid level in the second concentration bottle.

8. The fully automated liquid-liquid extraction and nitrogen blowing combined apparatus according to claim 1, characterized in that, The nitrogen blowing mechanism includes a nitrogen blowing tube and a blowing tube mounting frame. The blowing tube mounting frame is used to install the nitrogen blowing tube and is rotatably mounted on the frame of the nitrogen blowing instrument to adjust the blowing angle of the nitrogen blowing tube.

9. The fully automated liquid-liquid extraction and nitrogen blowing combined instrument according to claim 1, characterized in that, The heating mechanism includes a heating shell and a heating element. The heating shell has several receiving holes, the second concentration bottle is inserted into the receiving holes, and the heating element is disposed inside the heating shell.

10. The fully automated liquid-liquid extraction and nitrogen blowing combined instrument according to claim 6, characterized in that, The nitrogen blowing device also includes a drain seat, the injection arm moves along the injection track to move the injection needle above the drain seat, and the filling arm moves along the filling track to move the filling nozzle above the drain seat.

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