A fully automatic heavy metal detector

Abstract

The utility model discloses a kind of full-automatic heavy metal detectors, including shell, rotary translation module, mix uniform liquid transfer module, liquid-adding module, detection module and electric control board.Rotary translation module is installed in shell, for carrying sample and reaction vessel and driving it moves in horizontal direction and rotates around vertical axis;Mix uniform liquid transfer module, liquid-adding module and detection module are located above rotary translation module and are sequentially spaced apart along its horizontal moving path, are respectively used for filling reagent, sucking and discharging liquid or blowing gas mixing, and carry out electrochemical detection;Electric control board is used to control the collaborative work of each module.The utility model realizes the full-automatic process of heavy metal detection by modular design and motion cooperation, solves the technical problem that existing technology relies on manual operation, time-consuming and laborious and large detection error.

Description

Technical Field

[0001] This utility model relates to the field of automatic detection instrument technology, specifically to a fully automatic heavy metal detector. Background Technology

[0002] With global economic development and accelerated industrialization, heavy metals, as widely used essential elements, are now extensively applied in industries such as electronics, aerospace, military, chemicals, and construction. However, the widespread use of heavy metals has also brought about problems such as environmental pollution and food safety. Heavy metal pollution poses a serious threat to the ecological environment and human health, especially some toxic and harmful heavy metals such as lead, mercury, and cadmium, which can accumulate in the human body and cause chronic harm to human health. Therefore, the accurate detection of heavy metal content has received widespread attention.

[0003] Existing heavy metal detectors require manual operation, cannot perform timely automatic monitoring, are cumbersome and time-consuming, and are prone to errors. They are also susceptible to the influence of factors such as operator skill level, operating procedures, and experimental environment, thus having certain limitations and failing to effectively achieve large-scale fully automated detection. Meanwhile, some traditional heavy metal detection methods, such as chemical analysis, atomic absorption spectroscopy, and electrochemical analysis, are limited in their application on actual industrial production lines due to their cumbersome operating procedures, long operating times, and high costs.

[0004] In summary, the existing technologies for automated biochemical and pharmaceutical testing instruments suffer from technical problems such as reliance on manual operation, time-consuming and labor-intensive processes, and large detection errors. Utility Model Content

[0005] The purpose of this application is to overcome the above-mentioned technical deficiencies and propose a fully automatic heavy metal detector to solve the technical problems of existing technologies, such as reliance on manual operation, time-consuming and labor-intensive operation, and large detection errors.

[0006] To achieve the above-mentioned technical objectives, the present application adopts the following technical solution: This application provides a fully automatic heavy metal detector, comprising: chassis; A rotary translation module is installed inside the housing to carry the sample and reaction vessel and drive them to move horizontally and rotate around the vertical axis. The mixing and pipetting module, the liquid addition module, and the detection module are all located above the rotating and translating module and are arranged sequentially and at intervals along the horizontal movement path of the rotating and translating module. They are used to add reagents to the reaction vessel, to aspirate or blow air to mix the liquid in the reaction vessel, and to perform electrochemical detection on the liquid after the reaction. The control board is electrically connected to the rotation and translation module, the mixing and dispensing module, the liquid addition module and the detection module, respectively.

[0007] In some embodiments of this application, the rotation and translation module includes a horizontal moving component and a rotating component; the horizontal moving component is fixed to the bottom of the housing, and the rotating component is slidably disposed on the horizontal moving component; the rotating component includes a rotation drive source and a rotating cup holder that is drively connected to the rotation drive source.

[0008] In some embodiments of this application, the rotation and translation module further includes an isolation cover, which is fixedly disposed between the horizontal moving component and the rotating component. The horizontal moving component and the rotating component are connected and driven through the isolation cover by a magnetic coupling mechanism. The material of the isolation cover includes engineering plastics, glass, ceramics or non-magnetic metal materials.

[0009] In some embodiments of this application, at least three workstations are provided on the top plate of the rotating assembly. Each workstation includes a main cup holder, a first test tube holder, and a second test tube holder. The main cup holder is located at the center of rotation and is used to place the analytical cell. The first test tube holder and the second test tube holder are both located outside the center of rotation and are used to place containers for holding cleaning fluid or waste liquid and containers for holding samples to be tested, respectively.

[0010] In some embodiments of this application, the mixing and pipetting module includes a first lifting and moving component and a multifunctional pipetting head; the first lifting and moving component is mounted on the housing, and the multifunctional pipetting head is mounted on the output end of the first lifting and moving component, for vertically moving up and down to insert into or detach from the reaction vessel.

[0011] In some embodiments of this application, the mixing and pipetting module further includes an air pump assembly, a plunger pump assembly, a solenoid valve, and a gas pipeline; the plunger pump assembly is a high-precision injection pump, and its piston rod is driven by a lead screw motor; the air outlet of the air pump assembly is connected to the input end of the solenoid valve, and the output end of the solenoid valve and the liquid pipeline of the plunger pump assembly are connected in parallel and then connected to the inner cavity of the multifunctional pipetting head; the electronic control board is configured to control the opening and closing of the solenoid valve to switch between air mixing mode and suction / discharge mode.

[0012] In some embodiments of this application, the lower end of the multifunctional pipette tip is provided with a tapered interface for adapting to standard laboratory pipette tips.

[0013] In some embodiments of this application, the liquid addition module includes a liquid addition pump assembly and a liquid addition head assembly; the liquid addition pump assembly includes a first liquid addition pump and a second liquid addition pump, and the liquid addition head assembly includes a first liquid addition head and a second liquid addition head arranged side by side; the input end of the first liquid addition pump is connected to a first reagent source, and the output end is connected to the first liquid addition head via a pipeline; the input end of the second liquid addition pump is connected to a second reagent source, and the output end is connected to the second liquid addition head via a pipeline.

[0014] In some embodiments of this application, the detection module includes a second lifting and moving component and an electrode plate socket; the second lifting and moving component is mounted on the housing, and the electrode plate socket is mounted on the output end of the second lifting and moving component; the bottom of the electrode plate socket is provided with a slot for inserting a heavy metal detection electrode plate, and the slot is provided with a metal contact that is connected to the electronic control board.

[0015] In some embodiments of this application, the detection module, the liquid dispensing head of the liquid dispensing module, and the liquid transfer head of the mixing and transfer module are located on the same straight line in the vertical projection direction, and the horizontal movement path of the rotation and translation module is parallel to this straight line.

[0016] Compared with the prior art, the beneficial technical effects of the technical solution provided in this application include: This invention achieves a fully automated process for heavy metal detection through modular design. It can complete sample addition, mixing, transfer and detection without operator intervention, which greatly improves detection efficiency and accuracy and solves the technical problems of existing technologies that rely on manual operation, are time-consuming and labor-intensive and have large detection errors. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in this application, the accompanying drawings used in the embodiments will be briefly described below: Figure 1 This is a schematic diagram of the overall structure of a fully automatic heavy metal detector according to an embodiment of this application; Figure 2 This is a schematic diagram of the internal structure of a fully automatic heavy metal detector according to an embodiment of this application; Figure 3 This is a schematic diagram of the structure of a rotation and translation module according to an embodiment of this application; Figure 4 This is a schematic diagram of the structure of a mixing and pipetting module in an embodiment of this application; Figure 5 This is a schematic diagram of the gas path principle of a mixing and dispensing module in an embodiment of this application; Figure 6 This is a schematic diagram of the structure of a detection module in an embodiment of this application.

[0018] Figure label: 1-Casing; 2-Rotation and translation module; 21-Horizontal movement component; 22-Rotation component; 221-Cable; 222-Rotation cup holder; 23-Isolation cover; 24-Main cup holder; 25-First test tube holder; 26-Second test tube holder; 3-Mixing and pipetting module; 31-First lifting and moving assembly; 32-Multi-functional pipetting head; 33-Plunger pump assembly; 34-Solenoid valve; 4-Liquid addition module; 5-Detection module; 51-Second lifting and moving assembly; 52-Electrode plate socket; 6-Electrical control board; 7. Touchscreen. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0020] Those skilled in the art will understand that, in this specification, the term "comprising" is an open-ended expression, meaning that the stated feature is present but other features are excluded. Directional terms such as "upper," "lower," "left," and "right" refer to exemplary directions based on the accompanying drawings. Features specified as "first" or "second" implicitly include one or more of that feature. Singular expressions can also be used in plural forms. "Multiple" means two or more. The terms "installed," "connected," and "linked" can refer to a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection via an intermediate medium, and it can be a connection within two components. Furthermore, "linked" can include wireless connections.

[0021] The purpose of this application is to overcome the above-mentioned technical deficiencies and propose a fully automatic heavy metal detector to solve the technical problems of existing technologies, such as reliance on manual operation, time-consuming and labor-intensive operation, and large detection errors.

[0022] To achieve the above-mentioned technical objectives, the present application adopts the following technical solution: like Figures 1-6As shown, this utility model provides a fully automatic heavy metal detector, including a housing 1, a rotary translation module 2, a mixing and pipetting module 3, a liquid addition module 4, a detection module 5, and an electronic control board 6. The housing 1 serves as an overall support structure, protecting the internal components. The rotary translation module 2 is installed at the bottom inside the housing 1, used to carry the sample and reaction vessel, and can drive it to move in the horizontal X-axis direction and rotate around the vertical Z-axis. The mixing and pipetting module 3, the liquid addition module 4, and the detection module 5 are all installed inside the housing 1, located above the rotary translation module 2, and arranged sequentially at intervals along the horizontal movement path of the rotary translation module 2. The liquid addition module 4 is used to add reagents to the reaction vessel, the mixing and pipetting module 3 is used to perform suction and discharge operations on the liquid in the reaction vessel or to mix it by blowing air, and the detection module 5 is used to perform electrochemical detection on the liquid after the reaction. The electronic control board 6 is electrically connected to the rotary translation module 2, the mixing and pipetting module 3, the liquid addition module 4, and the detection module 5, respectively, and is responsible for power supply and signal control. The surface of the housing 1 is also equipped with a touch screen 7, which is connected to the electronic control board 6 for human-machine interaction.

[0023] Working Principle: The detection process is as follows: The operator manually places the first test tube containing the cleaning solution (i.e., the container on the first test tube holder), the second test tube containing the sample (i.e., the container on the second test tube holder), and the empty analytical cell into the corresponding positions on the rotating assembly. The electrode pads are manually inserted into the electrode pad socket 52. The instrument is started via the touchscreen 7. The rotation and translation module 2 moves the rotating assembly horizontally, aligning the second test tube directly below the first liquid dispensing head. The first liquid dispensing pump of the liquid dispensing module 4 operates, adding a certain amount of the first reagent to the test tube containing the sample. Then, the instrument moves horizontally, aligning the second test tube directly below the multi-functional pipette 32. The multi-functional pipette 32 is lowered and inserted into the second test tube. The solenoid valve 34 opens, energizing the air pump assembly to dispense air for mixing. The valve is then closed, and the instrument is allowed to stand for a moment to allow the sample solution to precipitate and separate. Subsequently, the multi-functional pipette 32 is inserted again, and the plunger pump assembly 33 draws up the supernatant. The rotation and translation module 2 moves horizontally, aligning the analytical cell with the pipette, and the plunger pump assembly 33 discharges the supernatant into the analytical cell. Next, the analytical cell moves below the second dispensing head and the second reagent is added. Finally, the analytical cell moves directly below the electrode holder 52, and the electrode is inserted into the liquid. The rotating assembly rotates the analytical cell, causing the heavy metal to be measured to accumulate on the electrode. The control board 6 analyzes the changes in current and voltage to obtain the results.

[0024] This embodiment uses a fully automated testing method to complete sample testing without the need for operators, which greatly improves testing efficiency and accuracy, while also reducing the possibility of human error.

[0025] like Figure 2As shown, the rotary translation module 2 includes a horizontal moving component 21 and a rotating component 22. The horizontal moving component 21 is fixed to the bottom of the housing 1 and can be a lead screw guide module or a belt guide module. The rotating component 22 is slidably disposed on the slider of the horizontal moving component 21 and performs horizontal reciprocating motion with it. The rotating component 22 includes a rotary drive source (such as a stepper motor) and a rotating cup holder 222 that is connected to the rotary drive source via a cable 221.

[0026] By combining horizontal and rotary motions, the system achieves a combination of workstation switching and stirring functions, simplifying the mechanical structure and making the instrument more compact.

[0027] like Figure 2 As shown, the rotation and translation module 2 also includes an isolation cover 23. The isolation cover 23 is fixedly disposed between the horizontal moving component 21 and the rotating component 22. Specifically, the horizontal moving component 21 is located below the isolation cover 23, and the rotating cup holder 222 of the rotating component 22 is located above the isolation cover 23. The rotation drive source can be located below the isolation cover and connected and driven to the rotating cup holder 222 above it through a magnetic coupling mechanism passing through the isolation cover 23. Alternatively, the rotation drive source can be located above the isolation cover but sealed. Preferably, the horizontal moving component and the rotating component are connected by a magnetic coupling mechanism. The material of the isolation cover 23 includes, but is not limited to, engineering plastics, glass, ceramics, or non-magnetic metals, and is a non-magnetic material.

[0028] By completely isolating the horizontal moving component from the rotating component in terms of physical structure, the corrosive liquids or volatile acid mists used in the testing process can be avoided from corroding the inside of the precision horizontal moving component, thus extending the service life of the equipment.

[0029] like Figure 3 As shown, the rotating assembly 22 has at least three workstations on its top plate: a main cup holder 24, a first test tube holder 25, and a second test tube holder 26. The main cup holder 24 is located at the center of rotation and is used to place the analytical cell; the first test tube holder 25 and the second test tube holder 26 are located outside the center of rotation. The first test tube holder 25 is used to place a container (first test tube) containing cleaning fluid or waste liquid, and the second test tube holder 26 is used to place a container (second test tube) containing the sample to be tested.

[0030] The rational workstation layout integrates sample tubes, cleaning stations, and detection cells onto the same rotating platform, allowing for quick switching of the operation objects through rotation, thus improving detection efficiency.

[0031] like Figure 4As shown, the mixing and pipetting module 3 includes a first lifting and moving assembly 31 and a multifunctional pipetting head 32. The first lifting and moving assembly 31 is mounted on the inner wall of the housing 1 or on a bracket, and the multifunctional pipetting head 32 is mounted on the output end of the first lifting and moving assembly 31. The first lifting and moving assembly 31 drives the multifunctional pipetting head 32 to move up and down in the vertical direction to insert into or detach from the reaction vessel (test tube or analytical cell) below.

[0032] It integrates lifting and pipetting functions, has a compact structure, and realizes integrated operation of sample addition and mixing.

[0033] like Figure 4 and Figure 5 As shown, the mixing and pipetting module 3 also includes an air pump assembly, a plunger pump assembly 33, a solenoid valve 34, and a gas pipeline. The plunger pump assembly 33 is preferably a high-precision syringe pump, whose piston rod is driven by a lead screw motor to ensure accurate aspiration and dispensing. The gas connection is as follows: the air outlet of the air pump assembly is connected to the input end of the solenoid valve 34, and the output end of the solenoid valve 34 is connected in parallel with the liquid pipeline of the plunger pump assembly 33, and then connected to the inner cavity of the multi-functional pipette head 32. The electronic control board 6 controls the opening and closing of the solenoid valve 34. When air mixing is required, the solenoid valve 34 opens, the air pump connects to the main gas path, and air is blown out through the pipette head to mix the sample; when liquid aspiration and dispensing are required, the solenoid valve 34 closes, the branch gas path of the air pump is disconnected, and the plunger pump can accurately aspirate and dispense liquid.

[0034] By using a parallel gas-liquid path design, a single pipette head achieves the dual functions of "air blowing and stirring" and "precise pipetting", avoiding the risk of cross-contamination caused by traditional mechanical stirring, and eliminating the need to change tools.

[0035] like Figure 4 As shown, the lower end of the multifunctional pipette tip 32 is provided with a tapered interface, the size of which is compatible with the standard pipette tip (pipette tip) commonly used in laboratories.

[0036] Disposable pipette tips can be quickly replaced, avoiding cross-contamination between different sample tests, and consumables are universal and readily available, reducing usage costs.

[0037] The liquid dispensing module 4 includes a liquid dispensing pump assembly and a liquid dispensing head assembly. The liquid dispensing pump assembly includes a first liquid dispensing pump and a second liquid dispensing pump, and the liquid dispensing head assembly includes a first liquid dispensing head and a second liquid dispensing head arranged side by side. The input end of the first liquid dispensing pump is connected to a first reagent source, and the output end is connected to the first liquid dispensing head via a pipeline; the input end of the second liquid dispensing pump is connected to a second reagent source, and the output end is connected to the second liquid dispensing head via a pipeline.

[0038] The dual-channel liquid addition design meets the needs of heavy metal detection, which requires the addition of different reagents (such as acid, buffer, colorimetric reagent, etc.) at different reaction stages, and realizes the automation of stepwise chemical reactions.

[0039] like Figure 6 As shown, the detection module 5 includes a second lifting and moving assembly 51 and an electrode plate socket 52. The second lifting and moving assembly 51 is mounted on the housing 1, and the electrode plate socket 52 is mounted on the output end of the second lifting and moving assembly 51. The bottom of the electrode plate socket 52 is provided with a slot for inserting heavy metal detection electrodes, and the slot is provided with metal contacts that connect to the electronic control board 6.

[0040] An electrode-based detection method is employed, enabling accurate and reliable detection of heavy metal elements in samples. An independent lifting detection module, combined with a pluggable electrode design, allows for automatic electrode immersion and data acquisition.

[0041] The liquid dispensing heads of the detection module 5 and the liquid dispensing module 4, and the liquid transfer head of the mixing and transfer module 3 are located on the same straight line in the vertical projection direction, and the horizontal movement path of the rotation and translation module 2 is parallel to this straight line.

[0042] The linear layout simplifies the control logic of the horizontal movement module, reduces blind spots in mechanical movement, and optimizes the internal space layout of the instrument.

[0043] The front panel of the housing 1 is fitted with a touch screen 7. The touch screen 7 integrates a parameter setting interface and a test result display interface.

[0044] It adopts advanced integrated circuit technology and an easy-to-control user interface, making it simpler and more convenient to use. The observation window facilitates real-time monitoring of the internal operating status.

[0045] The first test tube holder 25 is configured as a cleaning station. After testing is completed or between steps, the rotation and translation module 2, carrying the rotation component, translates the first test tube holder 25 (on which a first test tube containing cleaning solution or an empty one is placed) so that it is directly below the multi-functional pipette tip 32. The first lifting and moving component 31 lowers the pipette tip and inserts it into the first test tube for soaking or aspiration cleaning. In addition to cleaning the pipette tip, the first test tube can also be used to collect waste liquid from the first and second reagents.

[0046] The unused workstations on the rotating disc serve as cleaning stations and wastewater collection stations, eliminating the need for additional cleaning pool structures. The structure is simple and easy to maintain.

[0047] The multifunctional pipette head 32 is also equipped with a liquid level detection sensor, which is a capacitive sensor or a pressure sensor and is electrically connected to the electronic control board 6.

[0048] It can automatically adjust the insertion depth of the pipette tip according to the different liquid volume in the sample tube, avoiding excessive liquid on the outer wall of the pipette tip, which would cause waste or contamination, and at the same time preventing air suction that would lead to incorrect sample volume.

[0049] The rotating cup holder 222 is equipped with an annular heating block and a temperature sensor, and the rotating translation module 2 is equipped with an electric slip ring connected to the annular heating block.

[0050] The voltammetric method for heavy metal leaching detection is greatly affected by temperature. The constant temperature heating device eliminates the detection error caused by changes in ambient temperature, and significantly improves the repeatability and reliability of the data.

[0051] A photoelectric sensor is provided on the rotating component 22 at the corresponding magnetic coupling position. A metal baffle is provided inside the horizontal moving component 21 to cooperate with the photoelectric sensor. The photoelectric sensor is connected to the electronic control board 6.

[0052] The inner side and rear of the casing 1 are equipped with exhaust fans for ventilation and heat dissipation.

[0053] Compared with the prior art, the beneficial technical effects of the technical solution provided in this application include: The fully automatic heavy metal detector provided by this utility model achieves accurate and reliable detection data through a fully automated operation process, magnetic coupling isolation and corrosion protection design, innovative pneumatic mixing and pipetting reuse technology, and a high-precision electrochemical detection module. It is also easy to operate and maintain and is widely applicable to heavy metal detection in food, water sources, soil and other fields, effectively protecting public health.

[0054] Those skilled in the art will understand that the steps, measures, and schemes in the various operations, methods, processes, and procedures discussed in this application can be alternated, modified, rearranged, decomposed, combined, or deleted.

[0055] The specific embodiments described above do not constitute a limitation on the scope of protection of this application. Any other corresponding changes and modifications made based on the technical concept of this application should be included within the scope of protection of the claims of this application.

Claims

1. A fully automatic heavy metal detector, characterized in that, include: chassis; A rotary translation module is installed inside the housing to carry the sample and reaction vessel and drive them to move horizontally and rotate around the vertical axis. The mixing and pipetting module, the liquid addition module, and the detection module are all located above the rotating and translating module and are arranged sequentially and at intervals along the horizontal movement path of the rotating and translating module. They are used to add reagents to the reaction vessel, to aspirate or blow air to mix the liquid in the reaction vessel, and to perform electrochemical detection on the liquid after the reaction. The control board is electrically connected to the rotation and translation module, the mixing and dispensing module, the liquid addition module and the detection module, respectively.

2. The fully automatic heavy metal detector according to claim 1, characterized in that, The rotation and translation module includes a horizontal moving component and a rotating component; the horizontal moving component is fixed to the bottom of the housing, and the rotating component is slidably disposed on the horizontal moving component; the rotating component includes a rotation drive source and a rotating cup holder that is drively connected to the rotation drive source.

3. The fully automatic heavy metal detector according to claim 2, characterized in that, The rotation and translation module also includes an isolation cover, which is fixedly disposed between the horizontal moving component and the rotating component. The horizontal moving component and the rotating component are connected and driven through the isolation cover by a magnetic coupling mechanism. The material of the isolation cover includes engineering plastics, glass, ceramics or non-magnetic metal materials.

4. The fully automatic heavy metal detector according to claim 2, characterized in that, The top plate of the rotating assembly is provided with at least three workstations, each workstation including a main cup holder, a first test tube holder, and a second test tube holder. The main cup holder is located at the center of rotation and is used to place the analytical cell. The first test tube holder and the second test tube holder are both located outside the center of rotation and are used to place containers for holding cleaning liquid or waste liquid and containers for holding samples to be tested, respectively.

5. The fully automatic heavy metal detector according to claim 1, characterized in that, The mixing and pipetting module includes a first lifting and moving component and a multi-functional pipetting head; the first lifting and moving component is mounted on the housing, and the multi-functional pipetting head is mounted on the output end of the first lifting and moving component, and is used to move up and down in the vertical direction to insert into or detach from the reaction vessel.

6. The fully automatic heavy metal detector according to claim 5, characterized in that, The mixing and pipetting module also includes an air pump assembly, a plunger pump assembly, a solenoid valve, and a gas pipeline; the plunger pump assembly is a high-precision injection pump, and its piston rod is driven by a lead screw motor; the air outlet of the air pump assembly is connected to the input end of the solenoid valve, and the output end of the solenoid valve and the liquid pipeline of the plunger pump assembly are connected in parallel and then connected to the inner cavity of the multi-functional pipetting head; the electronic control board is configured to control the opening and closing of the solenoid valve to switch between air mixing mode and suction / discharge mode.

7. The fully automatic heavy metal detector according to claim 5, characterized in that, The lower end of the multi-functional pipette tip is provided with a tapered interface for fitting standard laboratory pipette tips.

8. The fully automatic heavy metal detector according to claim 1, characterized in that, The liquid addition module includes a liquid addition pump assembly and a liquid addition head assembly; the liquid addition pump assembly includes a first liquid addition pump and a second liquid addition pump, and the liquid addition head assembly includes a first liquid addition head and a second liquid addition head arranged side by side; the input end of the first liquid addition pump is connected to a first reagent source, and the output end is connected to the first liquid addition head via a pipeline; The input end of the second liquid pump is connected to the second reagent source, and the output end is connected to the second liquid dispensing head via a pipeline.

9. The fully automatic heavy metal detector according to claim 1, characterized in that, The detection module includes a second lifting and moving component and an electrode plate socket; the second lifting and moving component is mounted on the housing, and the electrode plate socket is mounted on the output end of the second lifting and moving component; the bottom of the electrode plate socket is provided with a slot for inserting heavy metal detection electrode plates, and the slot is provided with metal contacts that are connected to the electronic control board.

10. The fully automatic heavy metal detector according to claim 1, characterized in that, The detection module, the liquid dispensing head of the liquid dispensing module, and the liquid transfer head of the mixing and transfer module are located on the same straight line in the vertical projection direction, and the horizontal movement path of the rotation and translation module is parallel to this straight line.

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