Laboratory liquid sample sampling device and method

Abstract

The present invention provides a laboratory liquid sample sampling device and method, including a sampling device, a movable arm for controlling the movement of the sampling device, and a walking device for controlling the movement of the movable arm, wherein the sampling device is provided with three, and the sampling device is externally connected to an air control device for extracting liquid samples; the sampling device also includes a first rotating device for controlling the sampling device to rotate in a first plane, and a second rotating device for controlling the sampling device to rotate in a second plane, wherein the rotation path of the second rotating device has a replacement area and a cleaning area, and the replacement area is located on the rotation path of the first rotating device. The invention avoids cross contamination during the liquid sample sampling process, and at the same time, ensures efficient liquid sample sampling.

Description

Technical Field

[0001] The present invention relates to the technical field of liquid sampling, and in particular to a laboratory liquid sample sampling device and method. Background Art

[0002] In an unmanned laboratory, the sampling device is controlled collaboratively by the walking device and the movable arm to move to a predetermined position, thereby completing actual continuous automatic sampling and analysis of different liquid samples and obtaining relevant parameters of the liquid samples.

[0003] For experimental testing of sewage and ground surface parameters, multiple sampling of different samples is required to ensure the accuracy of sample extraction and the accuracy of test results; for sampling of different liquid samples, in order to avoid cross contamination, the sampling needle needs to be replaced during the sampling switching process.

[0004] In the prior art, some sampling devices can achieve automatic switching of needles by setting a sampling needle replacement structure, thereby avoiding cross-contamination of liquid samples during the sampling process. However, the above solution requires preparing multiple sampling needles, and the removed needles need to be cleaned regularly, which increases the cost of laboratory sampling and cannot achieve fully automated sampling and testing.

[0005] Some companies set up a clean area on the top of the walking device. During the sampling switching process, the contaminated syringes are moved to the clean area and the syringes are deeply cleaned in all directions through ultrasonic cleaning and other methods, thus avoiding cross contamination during the liquid sample sampling process. However, this design requires frequent shutdowns for cleaning during the sampling process. For some severely contaminated and viscous liquid samples, the cleaning time is increased, reducing the efficiency of unmanned sampling and testing of liquid samples. Summary of the invention

[0006] In view of the above problems, the present invention provides a laboratory liquid sample sampling device and method, which avoids cross contamination during the liquid sample sampling process and ensures efficient liquid sample sampling.

[0007] To solve the above problems, the technical solution adopted by the present invention is:

[0008] A laboratory liquid sample sampling device comprises a sampling device, a movable arm for controlling the movement of the sampling device, and a walking device for controlling the movement of the movable arm, wherein three sampling devices are provided, and the sampling device is externally connected to an air control device for extracting liquid samples; the device also comprises a first rotating device for controlling the sampling device to rotate in a first plane, and a second rotating device for controlling the sampling device to rotate in a second plane, wherein a replacement area and a cleaning area are provided on the rotation path of the second rotating device, wherein the replacement area is located on the rotation path of the first rotating device, and a cleaning device is provided in the cleaning area for cleaning the sampling device.

[0009] Preferably, the first rotating device includes a rotating mounting base, both ends of the rotating mounting base are provided with positioning sleeves for placing the sampling device, an air guide block is provided at the rotation axis of the rotating mounting base, the air guide block is sealed and rotatably connected to the rotating mounting base, a first air guide duct is provided inside the air guide block, and two second air guide ducts are provided inside the rotating mounting base, and the second air guide ducts are located on the rotation path of the first air guide duct.

[0010] Through the above structural design, the liquids in the two sampling devices can be controlled separately, and the control structure and control method are simple and efficient, meeting the needs of continuous extraction of liquid samples; and the gas control will not cause contamination to the sample, and the sampling volume can be accurately controlled to meet the needs of efficient detection.

[0011] Preferably, the second rotating device comprises a second rotating mounting seat, a double-head telescopic assembly for grabbing the sampling device is installed inside the second rotating mounting seat, and a telescopic device for moving the double-head telescopic assembly is arranged at the rotation axis of the second rotating mounting seat.

[0012] The above structural design ensures that the first rotating device can control the normal rotation of the sampling device, while ensuring the stability of the insertion position and strength of the sampling device, and ensuring the stability of multiple sampling devices in the process of alternately detecting liquid samples.

[0013] Preferably, a locking sleeve is fixed to the side wall of the sampling device, a locking opening is opened on the side wall of the locking sleeve, the double-head telescopic assembly includes a first telescopic base and two first telescopic ends, the outer diameter of the first telescopic end is smaller than the inner diameter of the locking opening, and a locking assembly is installed between the first telescopic end and the inner wall of the locking opening.

[0014] Preferably, the sampling device comprises a sampling outer sleeve, a serpentine storage pipe is installed inside the sampling outer sleeve, a first end of the storage pipe is connected to a sampling needle tube, and a second end of the storage pipe is connected to a conducting base.

[0015] Through the serpentine storage pipe design, more liquid samples can be accommodated during one extraction process, reducing the frequency of liquid sample extraction and improving the efficiency of sampling; at the same time, the extended storage pipe can have a certain gas separation area to prevent liquid from entering the second gas guide pipe and avoid cross-contamination of liquid samples during subsequent detection.

[0016] Preferably, the cleaning device includes a first cleaning component corresponding to the sampling needle tube end and a second cleaning component corresponding to the conductive base end. An external circulation device is connected between the first cleaning component and the second cleaning component, and also includes a driving device for controlling the linear movement of the first cleaning component and the second cleaning component.

[0017] Preferably, the first cleaning assembly comprises a first cleaning sleeve, a first water hole is arranged at the bottom of the first cleaning sleeve, and a first conducting joint communicating with the first water hole is arranged at the top of the first cleaning sleeve.

[0018] Preferably, the second cleaning assembly comprises a second cleaning sleeve, and a second conductive joint corresponding to the conductive base is fixed on the upper end surface of the second cleaning sleeve.

[0019] Preferably, a recovery device is also installed on the upper end of the walking device, and the recovery device is located within the movable range of the movable arm.

[0020] A laboratory liquid sample sampling method uses the above-mentioned laboratory liquid sample sampling equipment, including the following steps: S1, controlling a first sampling device to move to a predetermined position through a movable arm to complete the sampling of a liquid sample; S2, after the first sampling device completes sampling of the liquid sample, controlling the first sampling device to rotate to a replacement area through a first rotating device; S3, after the first sampling device rotates to the replacement area, rotating the first sampling device to a cleaning area through a second rotating device, and completing the cleaning of the first sampling device through a cleaning device.

[0021] The beneficial effects of the present invention are:

[0022] Compared with the prior art, the present invention can realize the continuous and automatic replacement of the sampling device, improve the efficiency of liquid sample extraction and detection, and meet the laboratory's needs for efficient detection of liquid samples; at the same time, the replaced sampling device can be located on the outside for separate cleaning to remove liquid residue in the sampling device, avoid cross contamination, and ensure the accuracy of the liquid sample detection results. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0024] Figure 2 For the present invention Figure 1Schematic diagram of the main structure.

[0025] Figure 3 For the present invention Figure 1 Schematic diagram of the top view structure.

[0026] Figure 4 It is a schematic diagram of the three-dimensional structure of the first rotating device and the second rotating device of the present invention.

[0027] Figure 5 For the present invention Figure 4 Schematic diagram of the side structure.

[0028] Figure 6 For the present invention Figure 5 AA section structure schematic diagram.

[0029] Figure 7 For the present invention Figure 6 Schematic diagram of the enlarged structure at B.

[0030] Figure 8 For the present invention Figure 6 Enlarged structural diagram at C.

[0031] In the figure: 100, walking device; 110, walking body; 120, walking driving wheel; 200, movable arm; 300, first rotating device; 310, air guide block; 311, first air guide duct; 320, rotating mounting base; 321, second air guide duct; 322, driving assembly; 330, positioning sleeve; 400, second rotating device; 410, telescopic device; 411, second telescopic base; 412, second telescopic end; 420, second rotating mounting seat; 430, double-head telescopic assembly; 431, first telescopic base; 432, first telescopic end end; 500, recovery device; 600, sampling device; 610, sampling outer sleeve; 620, conductive base; 630, storage pipeline; 640, sampling needle tube; 650, locking sleeve; 651, locking opening; 700, cleaning device; 710, driving device; 711, electric guide rail; 712, electric slider; 713, connecting plate; 720, first cleaning component; 721, first cleaning sleeve; 722, first water hole; 723, first conductive joint; 730, second cleaning component; 731, second cleaning sleeve; 732, second conductive joint. DETAILED DESCRIPTION

[0032] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0033] The laboratory liquid sample sampling equipment includes a sampling device 600, a movable arm 200 for controlling the movement of the sampling device 600, and a walking device 100 for controlling the movement of the movable arm 200. In an unmanned laboratory, the walking device 100 and the movable arm 200 coordinately control the sampling device 600 to move to a predetermined position, thereby completing actual continuous automatic sampling and analysis of different liquid samples and obtaining relevant parameters of the liquid samples.

[0034] For experimental detection of sewage and ground surface parameters, it is necessary to sample different samples multiple times to ensure the accuracy of sample extraction and the accuracy of test results; for sampling different liquid samples, in order to avoid cross contamination, the sampling needles need to be replaced during the sampling switching process; in the prior art, some sampling equipment can achieve automatic switching of needles by setting a sampling needle replacement structure, thereby avoiding cross contamination of liquid samples during the sampling process, but the above scheme requires preparation of multiple sampling needles, and the removed needles need to be cleaned regularly, which increases the cost of laboratory sampling and cannot achieve fully automated sampling and detection.

[0035] Some companies set up a cleaning area on the top of the walking device 100. During the sampling switching process, the contaminated syringes are moved to the clean area, and the syringes are deeply cleaned in all directions through ultrasonic cleaning and other methods, thereby avoiding cross contamination during the liquid sample sampling process. However, this design requires frequent shutdowns for cleaning during the sampling process. For some liquid samples that are severely contaminated and have high viscosity, the cleaning time is increased, which reduces the efficiency of unmanned sampling and testing of liquid samples.

[0036] See attached Figure 1 -Attached Figure 8 A laboratory liquid sample sampling device. In order to solve the above problems, the improved design preferably sets three sampling devices 600. The sampling device 600 is externally connected to an air control device for extracting liquid samples. The air control device can change the direction of the airflow and the pressure in the sampling device 600, control the directional flow of the liquid sample, and realize continuous sampling of the liquid sample.

[0037] The sampling device also includes a first rotating device 300 for controlling the sampling device 600 to rotate in a first plane, and a second rotating device 400 for controlling the sampling device 600 to rotate in a second plane. The second rotating device 400 has a replacement area and a cleaning area on its rotation path. The replacement area is located on the rotation path of the first rotating device 300. A cleaning device 700 is provided in the cleaning area for cleaning the sampling device 600. During the detection process, different sampling devices 600 are controlled to circulate in the detection area, the replacement area and the cleaning area in turn, and the remaining sampling devices 600 can be cleaned synchronously during the liquid sample detection process. The above operation can be achieved by coordinated control of the rotation of the first rotating device 300 and the second rotating device 400.

[0038] It should be noted here that, preferably, the above-mentioned first plane is a vertical plane, and the above-mentioned second plane is a horizontal plane. The rotation directions of the first rotating device 300 and the second rotating device 400 are perpendicular to each other, which can reduce the assembly and control accuracy of the sampling device 600 and ensure that the inspection, replacement and cleaning of the sampling device 600 are carried out normally.

[0039] In summary, through the above scheme, the continuous and automatic replacement of the sampling device 600 can be achieved, the efficiency of liquid sample extraction and detection is improved, and the laboratory's needs for efficient detection of liquid samples are met; at the same time, the replaced sampling device 600 can be located on the outside for separate cleaning to remove liquid residues in the sampling device 600, thereby avoiding cross contamination and ensuring the accuracy of the liquid sample detection results.

[0040] Furthermore, the cleaning area is staggered from the detection area and is located at an upper position, which will not affect the liquid sampling process. Meanwhile, the cleaning of the sampling device 600 is performed separately and sealed, and will not leak and affect the liquid sample components in the laboratory.

[0041] Please refer to the attached Figure 4 -Attached Figure 8 ; Specifically; The first rotating device 300 includes a rotating mounting base 320, and positioning sleeves 330 for placing the sampling device 600 are arranged at both ends of the rotating mounting base 320. A gas guide block 310 is arranged at the rotation axis of the rotating mounting base 320. The gas guide block 310 is sealed and rotatably connected with the rotating mounting base 320. A driving component 322 is installed on the surface of the rotating mounting base 320. The rotating mounting base 320 is controlled to rotate by the driving component 322, and the sampling device 600 is controlled to rotate in the first plane; the gas is controlled to be transmitted between the gas guide block 310 and the rotating mounting base 320, and the quantitative extraction of the liquid sample is realized in the process of extracting the gas; the quantitative discharge of the liquid sample is realized in the process of delivering the gas, and the sampling control of the liquid sample is realized.

[0042] Please refer to the attached Figure 8 Specifically, a first air guide duct 311 is provided inside the air guide block 310, and two second air guide ducts 321 are provided inside the rotating mounting base 320. The second air guide ducts 321 are located on the rotating path of the first air guide duct 311. A rotating seal can be installed between the air guide block 310 and the rotating mounting base 320 to ensure the air tightness between the two and the air tightness between the two second air guide ducts 321; the first air guide duct 311 is selected to be at the bottom position, and after the corresponding second air guide duct 321 is rotated to the bottom position, the corresponding second air guide duct 321 is connected with the first air guide duct 311 to realize gas conduction control; the second air guide duct 321 located at the top position is in a sealed and isolated state to ensure the normal replacement of the sampling device 600.

[0043] Through the above-mentioned structural design, the liquids in the two sampling devices 600 can be controlled individually, and the control structure and control method are simple and efficient, meeting the needs of continuous extraction of liquid samples; and the gas control will not cause contamination to the sample, and the sampling volume can be accurately controlled to meet the needs of efficient detection.

[0044] The second rotating device 400 includes a second rotating mounting seat 420, and a double-headed telescopic assembly 430 for grabbing the sampling device 600 is installed inside the second rotating mounting seat 420. A telescopic device 410 for moving the double-headed telescopic assembly 430 is provided at the rotation axis of the second rotating mounting seat 420. By controlling the double-headed telescopic assembly 430 to extend, the sampling device 600 in the replacement area can be grabbed, and the corresponding sampling device 600 can be controlled to rotate into the cleaning area; through the telescopic device, the second rotating device 400 can control the sampling device 600 to move up and down, so that the sampling device 600 is away from the positioning sleeve 330 and staggered with the positioning sleeve 330.

[0045] The above structural design ensures that the first rotating device 300 can control the normal rotation of the sampling device 600, while ensuring the stability of the insertion position and strength of the sampling device 600, and ensuring the stability of multiple sampling devices 600 in the process of alternately detecting liquid samples.

[0046] Furthermore, in order to ensure the accuracy of grasping and positioning of the sampling device 600 and its stability during movement; a locking sleeve 650 is fixed to the side wall of the sampling device 600, and a locking opening 651 is opened on the side wall of the locking sleeve 650, and the double-head telescopic assembly 430 includes a first telescopic base 431 and two first telescopic ends 432, the outer diameter of the first telescopic end 432 is smaller than the inner diameter of the locking opening 651, and a locking assembly is installed between the first telescopic end 432 and the inner wall of the locking opening 651. The locking assembly here can be selected as a locking structure or an electrically controllable rod-shaped structure. After the first telescopic end 432 is extended to a predetermined position, the sampling device 600 can be grasped to realize the switching of the position of the sampling device 600.

[0047] Please refer to the attached Figure 7 Specifically, the sampling device 600 includes a sampling outer sleeve 610, a serpentine storage pipe 630 is installed inside the sampling outer sleeve 610, a first end of the storage pipe 630 is connected to a sampling needle tube 640, and a second end of the storage pipe 630 is connected to a conductive base 620. The sampling needle tube 640 here is designed according to the container for accommodating the liquid sample, and the sampling needle tube 640, the conductive base 620, and the storage pipe 630 are detachably designed and can be replaced as needed; through the design of the serpentine storage pipe 630, more liquid samples can be accommodated during one extraction process, reducing the frequency of liquid sample extraction and improving the sampling efficiency; at the same time, the extended storage pipe 630 can have a certain gas separation area to prevent liquid from entering the second gas guide pipe 321, thereby avoiding cross contamination of liquid samples during subsequent detection.

[0048] Please refer to the attached Figure 7 Specifically, the cleaning device 700 includes a first cleaning component 720 corresponding to the end of the sampling needle tube 640, and a second cleaning component 730 corresponding to the end of the conductive base 620. An external circulation device is connected between the first cleaning component 720 and the second cleaning component 730. The circulation device controls the circulation of cleaning liquid between the first cleaning component 720 and the second cleaning component 730 to circulate and clean the interior of the sampling device 600 to avoid cross contamination during subsequent sampling. At the same time, after the liquid circulation cleaning is completed, hot air can be used for circulation drying to avoid water stains overflowing and affecting the sampling equipment and liquid samples.

[0049] It also includes a driving device 710 for controlling the linear movement of the first cleaning component 720 and the second cleaning component 730. The driving device 710 controls the first cleaning component 720 and the second cleaning component 730 to approach or move away from each other. In the process of the first cleaning component 720 and the second cleaning component 730 approaching the sampling device 600, the sampling device 600 can be sealed from both sides to ensure that the cleaning liquid and the dry gas can circulate in the sealed ring to avoid overflow; in the process of the two moving away from each other, they are staggered with the sampling device 600, so that the second rotating device 400 can control the free rotation of the sampling device 600 to achieve replacement of the sampling device 600.

[0050] The driving device 710 here can be selected as a telescopic element for control. The driving device 710 is preferably a combination of an electric guide rail 711 and an electric slider 712. There are two electric sliders 712, which can be controlled individually and are connected to the corresponding first cleaning component 720 and second cleaning component 730 through a connecting plate 713 to achieve movement control.

[0051] It should be noted here that the electric guide rail 711 is fixedly connected to the second rotating mount 420 by connecting the workpiece. When the telescopic device 410 controls the linear movement of the second rotating mount 420, it can drive the electric guide rail 711 to move synchronously, so that the sampling device 600 in the cleaning area and the first cleaning component 720 and the second cleaning component 730 on both sides can move linearly synchronously; through the above-mentioned structural design, while the first sampling device 600 is replaced in the replacement area, the sampling device 600 in the cleaning area can continuously complete cleaning and drying, ensuring the cleaning time and effect.

[0052] Please refer to the attached Figure 7 Preferably, the first cleaning component 720 includes a first cleaning sleeve 721, a first water hole 722 is arranged at the bottom position of the first cleaning sleeve 721, a first conductive joint 723 connected to the first water hole 722 is arranged at the top of the first cleaning sleeve 721, and a circulation device is connected to the first conductive joint 723 to control the discharge of cleaning liquid or dry hot air from the first water hole 722 to achieve cleaning and drying of the outer wall and inner wall of the sampling needle tube 640. Here, the first water hole 722 is arranged at the bottom position, and the cleaning liquid flows from bottom to top, first cleaning the outer wall of the sampling needle tube 640, and then flows to the inner wall of the sampling needle tube 640, completing the efficient cleaning of the inner wall of the sampling needle tube 640.

[0053] It should be noted here that after cleaning is completed, the first water hole 722 is individually controlled to perform reverse water absorption to discharge the cleaning liquid between the sampling needle tube 640 and the first cleaning sleeve 721. After the cleaning liquid is discharged, it is circulated and dried by dry hot air to avoid water stains to the greatest extent.

[0054] Preferably, the second cleaning component 730 includes a second cleaning sleeve 731, and a second conductive joint 732 corresponding to the conductive base 620 is fixed on the upper end surface of the second cleaning sleeve 731. The second conductive joint 732 can be adapted to the conductive base 620, and the second conductive joint 732 is inserted into the conductive base 620 to achieve sealing of the bottom to avoid overflow of cleaning liquid and dry hot air; the circulation device controls the continuous discharge of the cleaning liquid from the bottom to achieve continuous cleaning and drying.

[0055] The outer wall of the second conductive joint 732 here is preferably a truncated cone, and the inner wall of the conductive base 620 is adapted to the outer wall of the second conductive joint 732. In the process of controlling the second conductive joint 732 to move upward, the second conductive joint 732 and the conductive base 620 can be gradually pressed against each other to enhance the sealing between the two structures.

[0056] A recovery device 500 is also installed at the upper end of the walking device 100. The recovery device 500 is located within the movable range of the movable arm 200. Before cleaning the sampling device 600, the sampling device 600 that has completed one inspection is controlled by the movable arm 200 to move to the recovery device 500, and the gas is reversely controlled to spray out, so as to discharge the residual liquid in the corresponding sampling device 600, thereby achieving preliminary cleaning of the sampling device 600. At the same time, it also avoids the residual liquid from overflowing during the process of replacing the sampling device 600, thereby avoiding affecting the laboratory environment and other liquid samples in the surrounding area. Similarly, the corresponding sampling device 600 can be preliminarily dried by dry hot air after the residual liquid is sprayed out, thereby further avoiding the overflow of residual liquid samples.

[0057] The present invention is further described below in conjunction with the sampling method.

[0058] A laboratory liquid sample sampling method, using the above-mentioned laboratory liquid sample sampling device, comprises the following steps:

[0059] S1. The movable arm 200 controls the first sampling device 600 to move to a predetermined position to complete the sampling of the liquid sample. The gas flow direction and pressure in the sampling device 600 are controlled by the gas control equipment, so that the liquid sample in the sampling container can be sampled, and the amount of liquid sampled at a time can be accurately controlled, and the liquid is placed in different detection containers respectively, so as to ensure the accuracy of liquid sample detection and ensure the efficient detection.

[0060] S2. After the first sampling device 600 has finished sampling the liquid sample, the first sampling device 600 is controlled to rotate to the replacement area through the first rotating device 300; at this time, the sampling device 600 located at the other end of the first rotating device 300 rotates to the bottom position, and other liquid samples are subsequently sampled through the sampling device 600, thereby avoiding cross contamination during the continuous sampling process and ensuring the accuracy of the liquid sample detection results. At the same time, the sampling device 600 can be quickly replaced by rotating the first rotating device 300, without the need for cleaning, waiting, and plugging and unplugging other sampling devices 600, thereby greatly improving the detection efficiency.

[0061] S3. After the first sampling device 600 is rotated to the replacement area, the first sampling device 600 is rotated to the cleaning area by the second rotating device 400, and the first sampling device 600 is cleaned by the cleaning device 700. The first sampling device 600 is rotated to the cleaning area, and deep cleaning can be achieved in the cleaning device 700 to prepare for the next liquid detection and avoid cross contamination of subsequent detections; at the same time, the sampling device 600 located in the cleaning area is rotated to the replacement area, and the cleaned sampling device 600 is inserted into the upper end position of the rotating mounting base 320 to prepare for the next rotation and replacement of the sampling device 600, thereby ensuring efficient subsequent sampling; the three sampling devices 600 perform sampling, preparation, and cleaning processes at different positions, respectively, thereby avoiding cross contamination during the liquid sample sampling process and ensuring efficient liquid sample sampling.

[0062] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A laboratory liquid sample sampling device, comprising a sampling device (600), a movable arm (200) for controlling the movement of the sampling device (600), and a walking device (100) for controlling the movement of the movable arm (200), characterized in that: The sampling device (600) is provided in three pieces, and the sampling device (600) is externally connected to a gas control device for extracting a liquid sample; the sampling device (600) also includes a first rotating device (300) for controlling the sampling device (600) to rotate in a first plane, and a second rotating device (400) for controlling the sampling device (600) to rotate in a second plane, wherein the second rotating device (400) has a replacement area and a cleaning area on its rotation path, the replacement area is located on the rotation path of the first rotating device (300), and a cleaning device (700) is provided in the cleaning area for cleaning the sampling device (600); The first rotating device (300) comprises a rotating mounting base (320), positioning sleeves (330) for placing a sampling device (600) are arranged at both ends of the rotating mounting base (320), an air guide block (310) is arranged at the rotation axis of the rotating mounting base (320), the air guide block (310) is connected to the rotating mounting base (320) in a sealed rotational manner, a first air guide duct (311) is arranged inside the air guide block (310), and two second air guide ducts (321) are arranged inside the rotating mounting base (320), and the second air guide ducts (321) are located on the rotation path of the first air guide duct (311); The second rotating device (400) comprises a second rotating mounting seat (420), a double-head telescopic assembly (430) for grabbing the sampling device (600) is installed inside the second rotating mounting seat (420), and a telescopic device (410) for moving the double-head telescopic assembly (430) is arranged at the rotation axis of the second rotating mounting seat (420); The first plane is a vertical plane, the second plane is a horizontal plane, and the rotation directions of the first rotating device and the second rotating device are perpendicular to each other; After the first sampling device (600) is rotated to the replacement area, the first sampling device (600) is rotated to the cleaning area by the second rotating device (400), and the first sampling device (600) is cleaned by the cleaning device (700). The first sampling device (600) is rotated to the cleaning area, and deep cleaning can be achieved in the cleaning device (700) to prepare for the next liquid detection and avoid cross contamination of subsequent detections; at the same time, the sampling device (600) located in the cleaning area is rotated to the replacement area, and the cleaned sampling device (600) is inserted into the upper end position of the rotating mounting base (320) to prepare for the next rotation of the sampling device (600) for replacement, thereby ensuring efficient subsequent sampling; the three sampling devices (600) perform sampling, preparation, and cleaning processes at different positions, thereby avoiding cross contamination during the liquid sample sampling process and ensuring efficient liquid sample sampling.

2. A laboratory liquid sample sampling device according to claim 1, characterized in that: A locking sleeve (650) is fixed to the side wall of the sampling device (600), and a locking opening (651) is opened on the side wall of the locking sleeve (650). The double-head telescopic assembly (430) includes a first telescopic base (431) and two first telescopic ends (432), and the outer diameter of the first telescopic end (432) is smaller than the inner diameter of the locking opening (651). A locking assembly is installed between the first telescopic end (432) and the inner wall of the locking opening (651).

3. A laboratory liquid sample sampling device according to any one of claims 1-2, characterized in that: The sampling device (600) comprises a sampling outer sleeve (610), a serpentine storage pipe (630) is installed inside the sampling outer sleeve (610), a first end of the storage pipe (630) is connected to a sampling needle tube (640), and a second end of the storage pipe (630) is connected to a conductive base (620).

4. A laboratory liquid sample sampling device according to claim 3, characterized in that: The cleaning device (700) includes a first cleaning component (720) corresponding to the end of the sampling needle tube (640), and a second cleaning component (730) corresponding to the end of the conductive base (620). An external circulation device is connected between the first cleaning component (720) and the second cleaning component (730). The cleaning device also includes a driving device (710) for controlling the linear movement of the first cleaning component (720) and the second cleaning component (730).

5. A laboratory liquid sample sampling device according to claim 4, characterized in that: The first cleaning assembly (720) comprises a first cleaning sleeve (721), a first water hole (722) being arranged at the bottom of the first cleaning sleeve (721), and a first conductive joint (723) being arranged at the top of the first cleaning sleeve (721) and being connected to the first water hole (722).

6. A laboratory liquid sample sampling device according to claim 4, characterized in that: The second cleaning assembly (730) comprises a second cleaning sleeve (731), and a second conductive connector (732) corresponding to the conductive base (620) is fixed on the upper end surface of the second cleaning sleeve (731).

7. A laboratory liquid sample sampling device according to claim 1, characterized in that: A recovery device (500) is also installed on the upper end of the walking device (100), and the recovery device (500) is located within the movable range of the movable arm (200).

8. A method for sampling a laboratory liquid sample, characterized in that: Using the laboratory liquid sample sampling device according to any one of claims 1 to 7 comprises the following steps: S1, controlling the first sampling device (600) to move to a predetermined position through the movable arm (200) to complete the sampling of the liquid sample; S2, after the first sampling device (600) has finished sampling the liquid sample, the first rotating device (300) controls the first sampling device (600) to rotate to the replacement area; S3. After the first sampling device (600) is rotated to the replacement area, the first sampling device (600) is rotated to the cleaning area by the second rotating device (400), and the first sampling device (600) is cleaned by the cleaning device (700).

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