Automatic grain heavy metal detection equipment

Abstract

The invention discloses and provides automatic grain heavy metal detection equipment which comprises a liquid path control module, a reagent storage module, a rice sample turntable module, a rice feeding module, a rice breaking module, a rice sample transfer module, a supernatant suction head, a reaction module, a filling module, an electrode module and an automatic electrode replacement module, through mutual cooperation of the liquid path control module, the reagent storage module, the rice sample turntable module, the rice feeding module, the rice breaking module, the rice sample transfer module, the reaction module, the filling module, the electrode module and the like, the occupied space is extremely small, and through cooperative work of the modules, the detection period can be greatly shortened, the number of detection samples in unit time is increased, and the detection efficiency is improved. And the large-scale grain detection requirement is met.

Description

Technical Field

[0001] This disclosure relates to the field of grain testing technology, and in particular to an automated grain heavy metal testing device. Background Technology

[0002] Currently, the industry commonly uses rice flour-based testing methods. Before testing rice samples, the samples need to be ground into rice flour outside the instrument. In this process, the amount of rice sample ground at one time usually needs to reach tens of grams, but only about 1 gram of rice flour is actually used for testing, which is a waste for some precious or scarce rice resources.

[0003] From the transfer of rice flour and the addition and mixing of reaction reagents to the measurement and recording of various test indicators, the entire process requires the collaboration of at least an entire laboratory and multiple staff members. Each step is based on the experience of different staff members, which greatly challenges the consistency and stability of the test results. Summary of the Invention

[0004] This disclosure provides an automated heavy metal detection device for grains to solve the technical problems recognized by the inventors.

[0005] This disclosure provides an automated grain heavy metal detection device, including a liquid circuit control module for liquid circuit control of the device; A reagent storage module includes a first reagent storage container and a second reagent storage container; A rice sample turntable module includes a turntable assembly and multiple rice sample cups, wherein the multiple rice sample cups are arranged in a circumferential array on the turntable assembly; The rice feeding module is located at the bottom of the rice sample turntable module; The broken rice module includes a sample receiving component and a broken rice component; The rice sample transfer module includes a rice sample transfer motion module and a rice sample transfer funnel, wherein the rice sample transfer motion module drives the rice sample transfer funnel to move between the rice feeding module and the broken rice module; A suction nozzle for drawing supernatant is positioned at one end of the rice sample transfer funnel near the broken rice module. The reaction module includes a reaction cup motion assembly and a reaction cup, wherein the reaction cup motion assembly is connected to the reaction cup via a transmission connection. The dispensing module is located above the reaction module; An electrode module includes an electrode motion module and an electrode base. The motor motion module is connected to the electrode base in a transmission manner, driving it to move closer to or away from the reaction module. The electrode base is detachably connected to an electrode sheet. An automatic electrode replacement module is used to replace the electrode plates of the motor mount; The liquid path control module is connected to the first reagent storage container and the second reagent storage container for extracting the first and second reagents; the liquid path control module is connected to the broken rice module for adding water and the first reagent to the sample receiving component; the liquid path control module is connected to the supernatant extraction pipette for extracting the supernatant; and the liquid path control module is connected to the dispensing module for adding the second reagent and the supernatant to the reaction cup.

[0006] Preferably, the liquid circuit control module includes a switching valve, a plunger pump, a first peristaltic pump, a first solenoid valve, and a second solenoid valve. The switching valve is connected to the first reagent storage container, the second reagent storage container, the dispensing module, the supernatant suction head, and the broken rice assembly, respectively. The input end of the plunger pump is connected to a pure water storage container, and the output end is connected to the switching valve. The first solenoid valve is located between the plunger pump and the switching valve, and the second solenoid valve is located between the plunger pump and the pure water storage container. The input end of the first peristaltic pump is connected to the pure water storage container, and the output end is connected to the broken rice assembly.

[0007] Preferably, the rice sample turntable assembly includes a divider and a sample tray. The divider is kinetically connected to the sample tray. The sample tray has multiple placement slots on its surface. The rice sample cup is embedded in one of the placement slots. The bottom of the rice sample cup has an opening. A cup base is hinged to the bottom opening of the rice sample cup via a cylindrical pin. A torsion spring is fitted on the cylindrical pin. A latch is provided at the end of the cup base away from the cylindrical pin. The rice dispensing module includes a rice dispensing funnel located below the sample tray. A rice dispensing cylinder is provided on one side of the rice dispensing funnel. A push hook is provided on the output shaft of the rice dispensing cylinder. The rice dispensing cylinder drives the push hook to move and pull the latch, causing the cup base to rotate about the cylindrical pin and open the bottom opening of the rice sample cup.

[0008] Preferably, a switch valve plate is hinged to the bottom opening of the rice sample transfer funnel, a first magnet is provided at one end of the switch valve plate, and a second magnet is provided above the first magnet in the rice sample transfer funnel, with the first magnet and the second magnet repelling each other.

[0009] Preferably, the sample receiving assembly includes a sample receiving motion module and a broken rice cup. The sample receiving motion module drives the broken rice cup to move closer to or away from the broken rice assembly. The bottom of the broken rice cup has a waste outlet, which is connected to a diaphragm pump via a pipe. The output end of the diaphragm pump is connected to a waste liquid recovery tank, which is located below the reaction module and connected to the switching valve. A push rod valve is movably connected inside the broken rice cup. The sample receiving motion module has a valve motor located below the broken rice cup, which drives the push rod valve to move up and down to open or close the waste outlet.

[0010] Preferably, the broken rice assembly includes a reflux hood fixing base, a broken rice motor, a blade fixing shaft, broken rice blades, and a reflux hood. The broken rice motor is fixedly connected to the surface of the reflux hood fixing base, and the reflux hood is disposed at the bottom of the reflux hood fixing base. The reflux hood has a water inlet pipe and a liquid inlet pipe. The water inlet pipe is connected to the first peristaltic pump, and the liquid inlet pipe is connected to the switching valve. The output shaft of the broken rice motor is connected to the blade fixing shaft, and the broken rice blades are fixedly connected to the bottom end of the blade fixing shaft.

[0011] Preferably, the dispensing module includes a first electric push rod and a dispensing head. The first electric push rod is connected to the dispensing head in a transmission manner. The dispensing head includes a first dispensing port and a second dispensing port. The first dispensing port and the second dispensing port are respectively connected to the switching valve through pipes for dispensing the second reagent and the supernatant.

[0012] Preferably, the automatic electrode replacement module includes an electrode picking assembly and an electrode replacement assembly. The electrode assembly includes an electrode storage box, an electrode retrieval motion module, a motor mounting plate, a rotary motor, and a vacuum suction cup. The electrode storage box holds multiple electrode sheets. The electrode retrieval motion module is located on the side of the motor storage box. The motor retrieval motion module drives the motor mounting plate to move closer to or away from the motor storage box. The rotary motor is fixedly connected to the motor mounting plate. The output shaft of the rotary motor is connected to a flexible hose connector. The flexible hose connector is fixedly connected to a vacuum tube. The vacuum suction cup is fixedly connected to the bottom end of the vacuum tube. The electrode swapping assembly includes an electrode swapping motion module, a gripper fixing seat, an electric gripper, and an electrode clamping block. The motor motion module drives the gripper fixing seat to move closer to or away from the electrode seat. The electric gripper is fixedly connected to the gripper fixing seat, and the output shaft of the electric gripper is connected to the electrode clamping block.

[0013] Preferably, it also includes a cleaning module, which includes a cleaning fixing plate, a second electric push rod, and a cleaning connector. The cleaning fixing plate is fixed to the side of the waste liquid recovery tank, the second electric push rod is fixedly connected to the cleaning fixing plate, the second electric push rod is drivenly connected to the cleaning connector, and the cleaning connector is connected to a second peristaltic pump through a pipe. The second peristaltic pump is connected to the pure water storage container through a pipe.

[0014] Preferably, the system further includes a weighing module, a weighing fixing plate, a weighing motion module, a weighing connecting block, a weighing sensor, and a weighing pan base. The weighing fixing plate is disposed below the turntable assembly. The weighing motion module is fixedly connected to the weighing fixing plate. The weighing motion module is drivenly connected to the weighing connecting block. The weighing sensor is fixed on the surface of the weighing connecting block, and the weighing pan base is fixed on the surface of the weighing sensor.

[0015] The main beneficial effects of this disclosure are: This invention utilizes a liquid path control module, reagent storage module, rice sample turntable module, rice loading module, broken rice module, rice sample transfer module, reaction module, dispensing module, and electrode module, all working in a very small footprint. Through the coordinated operation of these modules, the detection cycle is significantly shortened, and the number of samples tested per unit time is increased, meeting the needs of large-scale grain testing. The rice sample turntable module can systematically store multiple rice samples, enabling continuous sample loading and testing. Once one rice sample has been tested, the system can immediately and automatically process the next sample without manual intervention, achieving continuous testing and further improving overall testing efficiency. The coordinated operation of these modules forms a standardized testing process, ensuring that each rice sample is tested under identical conditions. This eliminates the influence of different operators or testing environments on the test results, making the results more consistent and comparable, and providing a more scientific and accurate basis for grain quality assessment. The liquid path control module and dispensing module can precisely control the amount of reagent added, avoiding reagent waste. Simultaneously, the rice loading module and broken rice module can accurately process rice samples according to testing requirements, reducing sample waste and lowering testing costs. This invention uses a sample receiving component and a rice crushing component to crush rice samples, centrifuge and allow the supernatant to settle. It can be used for small-scale rice sample crushing, saving the required number of samples, and its high integration reduces labor costs. Furthermore, this application relies on manual electrode replacement, a process that is not only cumbersome but also prone to errors due to operator negligence. Once the electrode has exceeded its lifespan, its surface may become passivated, contaminated, or its performance may degrade, affecting the accuracy and stability of the detection signal and ultimately reducing detection precision. Additionally, manual electrode replacement requires considerable time, including pausing the detection process, opening the equipment, removing the old electrode, installing the new electrode, and readjusting the equipment. This undoubtedly extends the overall detection cycle and reduces detection efficiency.

[0016] This application achieves automatic replacement of electrode sheets through an automatic electrode replacement module, eliminating the need for manual intervention and ensuring process efficiency.

[0017] It should be understood that both the foregoing general description and the following detailed description are for illustrative purposes and do not necessarily limit the scope of this disclosure. The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate the subject matter of this disclosure. Furthermore, the specification and drawings serve to explain the principles of this disclosure. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the specific embodiments of this disclosure or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is a three-dimensional structural diagram of the testing equipment according to an embodiment of the present disclosure; Figure 2 This is a schematic diagram of the back structure of the testing device according to an embodiment of the present disclosure; Figure 3 This is a piping layout diagram of the liquid circuit control module according to an embodiment of the present disclosure. Figure 4 This is a schematic diagram of the rice sample turntable module structure according to an embodiment of the present disclosure; Figure 5 This is a schematic diagram of the rice sample cup structure according to an embodiment of the present disclosure; Figure 6 This is a schematic diagram of the structure of the rice dispensing module and the filling module according to an embodiment of the present disclosure; Figure 7 This is a schematic diagram of the rice sample transfer module structure according to an embodiment of the present disclosure; Figure 8 This is a schematic diagram of the interface component structure according to an embodiment of the present disclosure; Figure 9 This is a cross-sectional view of the rice-breaking cup structure according to an embodiment of the present disclosure; Figure 10 This is a schematic diagram of the broken rice component structure according to an embodiment of the present disclosure; Figure 11 This is a cross-sectional view of the broken rice component structure according to an embodiment of this disclosure; Figure 12 This is a schematic diagram of the reaction module, electrode module, and automatic motor replacement module according to an embodiment of the present disclosure; Figure 13 This is a schematic diagram of the cleaning module structure according to an embodiment of the present disclosure; Figure 14 This is a schematic diagram of the weighing module structure according to an embodiment of the present disclosure; icon: 100-Liquid circuit control module; 101-Switching valve; 102-Plunger pump; 103-First peristaltic pump; 104-Second peristaltic pump; 105-Diaphragm pump; 106-First solenoid valve; 107-Second solenoid valve; 108-Waste liquid recovery tank; 200 - Reagent storage module; 21 - First reagent storage container; 22 - Second reagent storage container; 300-Sample turntable module; 31-Divider; 32-Sample tray; 33-Sample cup; 331-Cup base; 332-Cylindrical pin; 333-Torsion spring; 334-Bayonet; 400 - Rice feeding module; 41 - Rice feeding funnel; 42 - Rice feeding cylinder; 43 - Push hook; 500 - Rice sample transfer module; 51 - Rice sample transfer motion module; 52 - Rice sample transfer funnel; 521 - Switch valve plate; 522 - First magnet; 523 - Second magnet; 53 - Supernatant suction tip; 600 - Broken Rice Module; 611 - Sample Receiving Motion Module; 612 - Broken Rice Cup; 613 - Waste Outlet; 614 - Push Rod Valve; 615 - Valve Motor; 621 - Return Shield Fixing Base; 622 - Return Shield; 623 - Broken Rice Motor; 624 - Blade Fixing Shaft; 625 - Broken Rice Blade; 626 - Liquid Inlet Pipe; 627 - Water Inlet Pipe; 700 - Filling module; 71 - First electric push rod; 72 - Filling head; 721 - First filling port; 722 - Second filling port; 800 - Reaction module; 81 - Reaction cup motion module; 82 - Reaction cup; 900 - Electrode module; 91 - Electrode motion module; 92 - Electrode holder; 110 - Automatic electrode replacement module; 1111 - Electrode storage box; 1112 - Electrode retrieval motion module; 1113 - Motor mounting plate; 1114 - Rotary motor; 1115 - Hose connector; 1116 - Vacuum tube; 1117 - Vacuum suction cup; 1121 - Electrode replacement motion module; 1122 - Gripper mounting base; 1123 - Electric gripper; 1124 - Electrode clamping block; 1125 - Waste electrode recycling box; 120 - Cleaning module; 1211 - Second electric push rod; 1212 - Cleaning connector; 1213 - Cleaning fixing plate; 130-Weighing module; 1311-Weighing fixing plate; 1312-Weighing motion module; 1313-Weighing connecting block; 1314-Weighing sensor; 1315-Scale pan base. Detailed Implementation

[0020] The technical solutions of this disclosure will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments.

[0021] Based on the embodiments in this disclosure, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this disclosure.

[0022] In the description of this disclosure, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this disclosure. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0023] In the description of this disclosure, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure based on the specific circumstances.

[0024] Example like Figure 1-14 As shown, this embodiment provides an automated grain heavy metal detection device, including a liquid circuit control module 100 for liquid circuit control of the device; The reagent storage module 200 includes a first reagent storage container 21 and a second reagent storage container 22; the first reagent storage container 21 stores a first reagent, and the second reagent storage container 22 stores a second reagent.

[0025] The rice sample turntable module 300 includes a turntable assembly and a plurality of rice sample cups 33, wherein the plurality of rice sample cups 33 are arranged in a circular array on the turntable assembly; The rice feeding module 400 is located at the bottom of the rice sample turntable module 300; The broken rice module 600 includes a sample receiving component and a broken rice component; The rice sample transfer module 500 includes a rice sample transfer motion module 51 and a rice sample transfer funnel 52. The rice sample transfer motion module 51 drives the rice sample transfer funnel 52 to move between the rice feeding module 400 and the broken rice module 600. The rice sample transfer motion module 51 is a linear motion module in the prior art. In this embodiment, a motor, lead screw and nut fixing seat are used. It can also be implemented by different structures such as cylinders. The linear motion structure of the motor and lead screw is the prior art. The specific structure and working principle will not be described in detail here. A supernatant suction head 53 is positioned at one end of the rice sample transfer funnel 52 near the broken rice module 600. The reaction module 800 includes a reaction cup 82 motion assembly and a reaction cup 82. The reaction cup 82 motion module is connected to the reaction cup 82 in a transmission manner. The reaction cup motion module 81 includes a reaction cup 82 fixed base. A drive motor is fixedly installed on one side of the reaction cup 82 fixed base. The output shaft of the drive motor is connected to a reaction cup 82 connector. One end of the reaction cup 82 connector is fixed to the reaction cup 82. The drive motor drives the reaction cup 82 connector to rotate, thereby driving the reaction cup 82 to rotate. The initial position of the reaction cup 82 is with the cup opening facing the side. After rotating 90 degrees, the cup opening faces upward. When the cup opening faces upward, a detection operation can be performed. The dispensing module 700 is positioned above the reaction module 800; The electrode module 900 includes an electrode motion module 91 and an electrode base 92. The motor motion module is connected to the electrode base 92 in a transmission manner, driving it to move closer to or away from the reaction module 800. The electrode base 92 is detachably connected to an electrode sheet. Automatic electrode replacement module 110 is used to replace the electrode plates of the motor mount; The liquid path control module 100 is connected to the first reagent storage container 21 and the second reagent storage container 22 for extracting the first and second reagents. The liquid path control module 100 is also connected to the broken rice module 600 for adding water and the first reagent to the sample receiving component. The liquid path control module 100 is connected to the supernatant suction head 53 for extracting the supernatant. The liquid path control module 100 is also connected to the dispensing module 700 for adding the second reagent and the supernatant to the reaction cup 82.

[0026] In this embodiment, the rice sample to be tested is placed in the rice sample cup 33. The rice sample cup 33 is rotated by the turntable assembly and moved above the rice feeding module 400. The rice feeding module 400 then transfers the rice sample from the rice sample cup 33 to the rice sample transfer funnel 52. The rice sample transfer motion module 51 moves the rice sample transfer funnel 52 above the sample receiving assembly, transferring the rice sample from the rice sample transfer funnel 52 to the sample receiving assembly. The rice sample is then broken up by injecting the first reagent and water through the rice crushing assembly, and then allowed to stand to obtain the supernatant. Simultaneously, the automatic electrode replacement module 110 installs a new electrode plate on the electrode holder 92 of the motor module. Then, the electrode motion module 91 moves the electrode holder 92 to a position close to the reaction module 800. The reaction cup 82 motion component drives the reaction cup 82 to rotate, so that the electrode sheet is inserted into the reaction cup 82. The second reagent is added through the dispensing module 700 to activate the electrode sheet before detection. After standing for a few minutes, the supernatant is extracted through the supernatant suction head 53. The supernatant is added into the reaction cup 82 through the dispensing module 700 for detection to obtain the detection result. After the detection is completed, the electrode motion module 91 drives the electrode holder 92 to return to the initial position. The used electrode sheet is removed and discarded through the automatic electrode replacement module 110, thus completing one detection process.

[0027] like Figure 3 As shown, Figure 3This is a pipeline layout diagram of the liquid circuit control module 100 in this embodiment. The liquid circuit control module 100 includes a switching valve 101, a plunger pump 102, a first peristaltic pump 103, a first solenoid valve 106, a second solenoid valve 107, and a second peristaltic pump 104. The switching valve 101 is connected to the first reagent storage container 21, the second reagent storage container 22, the dispensing module 700, the supernatant suction head 53, and the broken rice assembly, respectively. Specifically, the switching valve 101 includes nine ports. One end of the plunger pump 102 is connected to a pure water storage container, and the other end is connected to the ninth port of the switching valve 101. The first port of the switching valve 101 is connected to the waste liquid recovery tank 108 through a pipe, the second port is connected to the first reagent storage container 21, the third port is connected to the second reagent storage container 22, the fourth port is connected to the supernatant suction head 53, and the fifth port is connected to... The broken rice component has a sixth interface connected to the filling module 700 to add supernatant, and a seventh interface connected to the filling module 700 to add the second reagent. The broken rice cup 612 is connected to the diaphragm pump 105 through a pipe. The output end of the diaphragm pump 105 is connected to the waste liquid recovery tank 108. The waste liquid remaining in the broken rice cup 612 is drawn into the waste liquid recovery tank 108 by the diaphragm pump 105 for recovery. The broken rice component is connected to the first peristaltic pump 103 through a pipe. The first peristaltic pump 103 is connected to the pure water storage container. The first peristaltic pump 103 draws pure water into the broken rice component and adds pure water into the broken rice cup 612 through the broken rice component. The cleaning connector 1212 of the cleaning module 120 is connected to the second peristaltic pump 104 through a pipe. The second peristaltic pump 104 is connected to the pure water storage container. The second peristaltic pump 104 draws pure water into the cleaning connector 1212 to clean the reaction cup 82.

[0028] During operation, taking the addition of the first reagent as an example, the switching valve 101 switches to the second port open state. At this time, the first reagent in the first reagent storage container 21 is drawn by the plunger pump 102 into the pipeline connecting the plunger pump 102 and the switching valve 101. The pipeline is long enough to hold the required first reagent. After the extraction is completed, the switching valve 101 switches to the fifth port open state, and the plunger pump 102 pushes the extracted first reagent into the rice break component, which adds it into the rice break cup 612, thus completing the addition of the first reagent. The extraction of other solutions is similar; simply changing the open state of different ports of the switching valve 101 is sufficient to complete the extraction and delivery of the solution. To clean the pipeline of the plunger pump 102, the first solenoid valve 106 and the second solenoid valve 107 are opened, and the switching valve 101 opens the first connector. Pure water is drawn by the plunger pump 102, flows through the first connector, and flows into the waste liquid recovery tank 108 for recycling, thus completing the cleaning.

[0029] Specifically, the rice sample turntable assembly includes a divider 31 and a sample tray 32. The divider 31 is connected to the sample tray 32 by transmission, driving the sample tray 32 to rotate. The sample tray 32 has multiple placement slots on its surface. The placement slots have an opening structure at the top and bottom and a step in the middle. The rice sample cup 33 is embedded in the placement slot, and the upper part of the rice sample cup 33 is placed in the step of the placement slot. The rice sample cup 33 can be directly removed from the top. The bottom of the rice sample cup 33 has an opening. The bottom opening of the rice sample cup 33 is hinged to a cup base 331 by a cylindrical pin 332. A torsion spring 333 is sleeved on the cylindrical pin 332. The end of the cup base 331 away from the cylindrical pin 332 has a latch 334. Through the elastic force of the torsion spring 333, the cup base 331 is tightly closed to the bottom opening of the rice sample cup 33. Under normal conditions, the rice sample will not leak from the bottom of the rice sample cup 33.

[0030] Specifically, the rice feeding module 400 includes a rice feeding funnel 41 disposed below the sample tray 32. A rice feeding cylinder 42 is disposed on one side of the rice feeding funnel 41. A push hook 43 is disposed on the output shaft of the rice feeding cylinder 42. The rice feeding cylinder 42 drives the push hook 43 to move and pull the latch 334, so that the cup base 331 rotates around the cylindrical pin 332 to open the opening at the bottom of the rice sample cup 33. After the push hook 43 pulls and flips the rice sample base, the rice sample leaks out from the bottom of the rice sample cup 33 and falls into the rice feeding funnel 41. It continues to fall along the rice feeding funnel 41 and finally enters the rice sample transfer funnel 52.

[0031] Specifically, a switch valve plate 521 is hinged to the bottom opening of the rice sample transfer funnel 52. A first magnet 522 is provided at one end of the switch valve plate 521, and a second magnet 523 is provided above the first magnet 522 in the rice sample transfer funnel 52. The first magnet 522 and the second magnet 523 repel each other. Through the repulsive force of the first magnet 522 and the second magnet 523, the switch valve plate 521 blocks the bottom opening of the rice sample transfer funnel 52, preventing the rice sample from leaving the rice sample transfer funnel 52 directly. The rice sample transfer motion module 51 drives the rice sample transfer funnel 52 to move back and forth between the rice feeding module 400 and the broken rice module 600. First, it catches the falling rice sample below the rice feeding module 400, and then it is driven by the rice sample transfer motion module 51 to move to the broken rice module 600, transferring the rice sample into the broken rice cup 612.

[0032] Specifically, the sample receiving component includes a sample receiving motion module 611 and a broken rice cup 612. The sample receiving motion module 611 drives the broken rice cup 612 to move closer to or away from the broken rice component. The sample receiving motion module 611 is a linear motion module in the prior art. In this embodiment, a motor and lead screw motion module is used. The broken rice cup 612 is connected to a nut that moves on the lead screw to achieve lifting and lowering. The motor and lead screw linear motion module is conventional prior art, and its specific structure and working principle will not be described in detail here. When the rice sample transfer funnel 52 moves above the broken rice cup 612, the broken rice cup 612 is driven to move upward by the sample receiving motion module 611. During the movement, the side wall of the broken rice cup 612 will contact the switch valve plate 521 at the bottom of the rice sample transfer funnel 52. At this time, the broken rice cup 612 will lift one end of the switch valve plate 521, causing the switch valve plate 521 to flip and open the bottom opening of the rice sample transfer funnel 52. The rice sample enters the broken rice cup 612 from the bottom opening. Then, the sample receiving motion module 611 drives the broken rice cup 612 to descend a certain distance. After the rice sample transfer funnel 52 leaves, it rises again to a position close to the broken rice component, waiting for the addition of the first reagent and pure water before the rice breaking operation is performed.

[0033] The broken rice cup 612 has a waste outlet 613 at its bottom. The waste outlet 613 is connected to a diaphragm pump 105 via a pipe. The output end of the diaphragm pump 105 is connected to a waste liquid recovery tank 108. The waste liquid recovery tank 108 is located below the reaction module 800 and is connected to the switching valve 101. A push rod valve 614 is movably connected inside the broken rice cup 612. The sample receiving motion module 611 is located below the broken rice cup 612 and has a valve motor 615. The valve motor 615 drives the push rod valve 614 to move up and down to open or close the waste outlet 613. When it is necessary to clean the remaining waste liquid in the broken rice cup 612, the valve motor 615 lifts the push rod valve 614, causing the push rod valve 614 to move away from the waste outlet 613. At this time, the waste outlet 613 is opened, and the diaphragm pump 105 pumps the waste liquid in the broken rice cup 612 into the waste liquid collection tank 108. In this embodiment, there are two waste outlets 613 and two diaphragm pumps 105, which can be used individually or together to ensure that the waste in the broken rice cup 612 is completely cleaned.

[0034] Specifically, the broken rice assembly includes a return hood 622 fixing base 621, a broken rice motor 623, a blade fixing shaft 624, a broken rice blade 625, and a return hood 622. The broken rice motor 623 is fixedly connected to the surface of the return hood 622 fixing base 621. The return hood 622 is disposed at the bottom of the return hood 622 fixing base 621. The return hood 622 has a water inlet pipe 627 and a liquid inlet pipe 626. The water inlet pipe 627 is connected to the first peristaltic pump 103, and the liquid inlet pipe 626 is connected to the switching valve 101. The output shaft of the broken rice motor 623 is connected to the blade fixing shaft 624, and the broken rice blade 625 is fixedly connected to the bottom end of the blade fixing shaft 624. After the rice-crushing cup 612 moves upward to the designated position, the rice-crushing blade 625 extends into the rice-crushing cup 612. At this time, pure water is pumped into the water inlet pipe 627 by the first peristaltic pump 103. The bottom opening of the water inlet pipe 627 is aligned with the rice-crushing cup 612, and pure water enters the rice-crushing cup 612 from the water inlet pipe 627. The first reagent is pumped into the liquid inlet pipe 626 by the plunger pump 102. The bottom opening of the liquid inlet pipe 626 is aligned with the rice-crushing cup 612, and the first reagent enters the rice-crushing cup 612 through the liquid inlet pipe 626. The extraction steps of the first reagent have been described in detail in the liquid circuit control module 100 above. After the pure water and the first reagent are added, the rice-crushing motor 623 drives the blade fixing shaft 624 to rotate, which drives the rice-crushing blade 625 to rotate to perform rice-crushing and centrifugation operations. After the rice is crushed, the rice-crushing cup 612 moves downward and waits for three minutes to stand to obtain the supernatant. After obtaining the supernatant, the supernatant is extracted by the suction head 53 fixed to one end of the rice sample transfer funnel 52.

[0035] Specifically, the dispensing module 700 includes a first electric push rod 71 and a dispensing head 72. The first electric push rod 71 is operatively connected to the dispensing head 72. The dispensing head 72 includes a first dispensing port 721 and a second dispensing port 722. The first dispensing port 721 and the second dispensing port 722 are respectively connected to the switching valve 101 via pipes for dispensing the second reagent and the supernatant. The dispensing head 72 is pushed above the reaction cup 82 by the first electric push rod 71, and the second reagent and the supernatant are dispensed into the reaction cup 82 by the plunger pump 102. The dispensing steps can refer to the process of adding the first reagent.

[0036] The automatic electrode replacement module 110 includes an electrode picking assembly and an electrode replacement assembly.

[0037] Specifically, the electrode assembly includes an electrode storage box 1111, an electrode retrieval motion module 1112, a motor mounting plate 1113, a rotary motor 1114, and a vacuum suction cup 1117. The electrode storage box 1111 holds multiple electrode sheets. The electrode retrieval motion module 1112 is a linear motion module as used in the prior art. In this embodiment, it employs a structure where a motor drives a lead screw to rotate, causing the lead screw nut to move up and down. The motor mounting plate 1113 is connected to the lead screw nut; its specific structure and working principle will not be described in detail here. The electrode retrieval motion module 1112 is located on the side of the motor storage box. The electrode retrieval motion module drives the motor mounting plate 1113 to move closer to or away from the motor storage box. The rotary motor 1114 is fixed... Connected to the motor mounting plate 1113, the output shaft of the rotary motor 1114 is connected to a flexible hose connector 1115, and the flexible hose connector 1115 is fixedly connected to a vacuum tube 1116. The vacuum suction cup 1117 is fixedly connected to the bottom end of the vacuum tube 1116. The vacuum suction cup 1117 is moved into the electrode storage box 1111 by the electrode picking motion module 1112. After the vacuum suction cup 1117 contacts the uppermost electrode plate, a vacuum is drawn by the vacuuming device to suck up the electrode plate. Then, the vacuum suction cup 1117 and the electrode plate are driven to rise by the electrode picking motion module 1112. After reaching the designated position, the rotary motor 1114 drives the vacuum suction cup 1117 and the electrode plate to rotate 90 degrees, waiting for the electrode plate replacement assembly to remove the electrode plate.

[0038] Specifically, the electrode swapping assembly includes an electrode swapping motion module 1121, a gripper fixing seat 1122, an electric gripper 1123, and an electrode clamping block 1124. The motor motion module drives the gripper fixing seat 1122 to move closer to or away from the electrode seat 92. The electric gripper 1123 is fixedly connected to the gripper fixing seat 1122, and the output shaft of the electric gripper 1123 is connected to the electrode clamping block 1124. The structure of the electrode changing motion module 1121 is the same as that of the electrode picking motion module 1112. It also uses a motor, lead screw, and lead screw nut transmission structure. The specific structure and working principle will not be described in detail here. The motor changing motion module drives the gripper fixing seat 1122 to move, which in turn drives the electric gripper 1123 to move, so that the two electrode clamping blocks 1124 move to the position of the electrode plate. The electric gripper 1123 drives the two electrode clamping blocks 1124 to clamp the electrode plate. At this time, the vacuum suction cup 1117 releases the electrode plate. The electrode changing motion module 1121 drives the electric gripper 1123 to continue to move upward, inserting the electrode plate into the electrode seat 92. Then it moves downward to return to the initial position. After the test is completed, the electrode changing motion module 1121 drives the electric gripper 1123 to move upward to pull the used electrode plate out of the electrode seat 92. After pulling it out, it moves downward to the initial position. The electric gripper 1123 releases the electrode plate, causing it to fall into the waste electrode recycling box 1125 placed below.

[0039] In one embodiment, a cleaning module 120 is also included. The cleaning module 120 includes a cleaning fixing plate 1213, a second electric push rod 1121, and a cleaning connector 1212. The cleaning fixing plate 1213 is fixed to the side of the waste liquid recovery tank 108. The second electric push rod 1121 is fixedly connected to the cleaning fixing plate 1213 and is kinetically connected to the cleaning connector 1212. The cleaning connector 1212 is connected to a second peristaltic pump 104 via a pipe. The second peristaltic pump 104 is connected to the pure water storage container via a pipe. After the reaction cup 82 is used, it is rotated back to its initial position with the opening facing the side. At this time, the second electric push rod 1121 drives the cleaning connector 1212 to move to a position aligned with the opening of the reaction cup 82. The second peristaltic pump 104 delivers pure water, which is used to rinse the reaction cup 82 through the cleaning connector 1212. Since the reaction cup 82 is above the waste liquid recovery tank 108, the cleaned water can directly enter the waste liquid recovery tank 108 for recycling.

[0040] In one embodiment, the system further includes a weighing module 130, a weighing fixing plate 1311, a weighing motion module 1312, a weighing connecting block 1313, a weighing sensor 1314, and a weighing pan base 1315. The weighing fixing plate 1311 is disposed below the turntable assembly. The weighing motion module is fixedly connected to the weighing fixing plate 1311. The weighing motion module is drively connected to the weighing connecting block 1313. The weighing sensor 1314 is fixedly mounted on the surface of the weighing connecting block 1313, and the weighing pan base 1315 is fixedly mounted on the surface of the weighing sensor 1314. The weighing motion module 1312 is a linear motion module in the prior art. It is a structure that drives the lead screw to rotate through a motor, thereby moving the lead screw nut. The linear motion can be achieved by fixing the weighing fixed plate 1311 and the lead screw nut. Its specific structure and working principle will not be described in detail here. The weighing motion module 1312 drives the weighing fixed plate 1311 to move upward, which in turn drives the weighing pan seat 1315 to move upward. During the movement of the weighing pan seat 1315, it lifts the rice sample cup 33 above. At this time, the weighing sensor 1314 measures the total weight of the rice sample cup 33 and the rice sample inside. The weight of the rice sample can be calculated by subtracting the weight of the rice sample cup 33.

[0041] The working principle of this invention is as follows: A certain amount of rice sample is placed into the rice sample cup 33. The turntable assembly drives the rice sample cup 33 to rotate to the position corresponding to the push hook 43. The push hook 43 pushes the cup base 331, causing the rice sample to automatically fall into the rice sample transfer funnel 52. The rice sample transfer funnel 52 moves above the rice crushing cup 612. The rice crushing cup 612 moves upward, pushing the switch valve plate 521 at the bottom of the rice sample transfer funnel 52 to flip, and the rice sample automatically falls into the rice crushing cup 612. The rice crushing cup 612 moves to the rice crushing blade 625. The first reagent and pure water are added through the water inlet pipe 627 and the liquid inlet pipe 626. The rice crushing motor is started, driving the rice crushing blade 625 to perform rice crushing operation for 2 minutes. During the rice crushing process, the vacuum suction cup 1117 moves downward to pick up the electrode plate. After picking up the electrode plate, the vacuum suction cup 1117 rises to a certain position. The electric gripper 1123 rotates 90 degrees to a fixed height, rises to the designated position, and clamps the electrode sheet. The vacuum suction cup 1117 releases the electrode sheet and rotates 90 degrees again to return to the initial position. The electric gripper 1123 continues to rise and inserts the electrode sheet into the electrode holder 92, realizing automatic insertion of the electrode sheet. At this time, the electric gripper 1123 resets, the electrode holder 92 moves towards the reaction cup 82, the reaction cup 82 rotates to the designated position, and the second reagent is added into the reaction cup 82 to activate the electrode sheet before detection. After activation, wait for the supernatant of the rice sample after the rice is broken. After the rice is broken, let it stand for 3 minutes, and the supernatant suction head 53 draws out the supernatant. The supernatant is added into the reaction cup 82 through the filling connector for detection. When the detection is completed, the electrode holder 92 returns to the initial position, the electric gripper 1123 rises to add the electrode sheet and discard it.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this disclosure, and are not intended to limit them. Although this disclosure has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this disclosure.

Claims

1. An automated grain heavy metal detection apparatus, comprising: The device comprises: a liquid path control module for controlling the liquid path of the device; a reagent storage module comprising a first reagent storage container and a second reagent storage container; a rice sample turntable module comprising a turntable assembly and a plurality of rice sample cups arranged in a circular array on the turntable assembly; a lower rice module arranged at the bottom of the rice sample turntable module; a broken rice module comprising a sample receiving assembly and a broken rice assembly; a rice sample transfer module comprising a rice sample transfer movement module and a rice sample transfer funnel, the rice sample transfer movement module driving the rice sample transfer funnel to move between the lower rice module and the broken rice module; a supernatant suction head arranged at one end of the rice sample transfer funnel close to the broken rice module; a reaction module comprising a reaction cup movement assembly and a reaction cup, the reaction cup movement module being in transmission connection with the reaction cup; a filling module arranged above the reaction module; an electrode module comprising an electrode movement module and an electrode seat, the electrode movement module being in transmission connection with the electrode seat to drive the electrode seat to move close to or away from the reaction module, and the electrode seat being detachably connected with an electrode sheet; an automatic electrode replacement module for replacing the electrode sheet of the electrode seat; wherein the liquid path control module is connected with the first reagent storage container and the second reagent storage container to extract the first reagent and the second reagent, the liquid path control module is connected with the broken rice module to add water and the first reagent to the sample receiving assembly, the liquid path control module is connected with the supernatant suction head to extract the supernatant, and the liquid path control module is connected with the filling module to add the second reagent and the supernatant to the reaction cup.

2. The automated grain heavy metal detection apparatus of claim 1, wherein, The liquid path control module comprises a switching valve, a plunger pump, a first peristaltic pump, a first electromagnetic valve, and a second electromagnetic valve, the switching valve is connected with the first reagent storage container, the second reagent storage container, the filling module, the supernatant suction head, and the broken rice assembly respectively, the input end of the plunger pump is connected with a pure water storage container, the output end is connected with the switching valve, the first electromagnetic valve is arranged between the plunger pump and the switching valve, the second electromagnetic valve is arranged between the plunger pump and the pure water storage container, the input end of the first peristaltic pump is connected with the pure water storage container, and the output end is connected with the broken rice assembly.

3. The automated grain heavy metal detection apparatus of claim 2, wherein, The rice sample turntable assembly comprises a divider and a sample disc, the divider is in transmission connection with the sample disc, a plurality of placing grooves are arranged on the surface of the sample disc, the rice sample cups are embedded in the placing grooves, the bottom of the rice sample cup is open, a cup base is hinged to the bottom opening of the rice sample cup through a cylindrical pin, a torsional spring is sleeved on the cylindrical pin, a bayonet is arranged at one end of the cup base away from the cylindrical pin, the lower rice module comprises a lower rice funnel arranged below the sample disc, a lower rice cylinder is arranged on one side of the lower rice funnel, a push hook is arranged on the output shaft of the lower rice cylinder, and the lower rice cylinder drives the push hook to move to pull the bayonet, so that the cup base rotates around the cylindrical pin to open the bottom opening of the rice sample cup.

4. The automated grain heavy metal detection apparatus of claim 2, wherein, The rice-like transfer funnel is hinged with an opening switch valve plate at the bottom opening, one end of the opening switch valve plate is provided with a first magnet, the rice-like transfer funnel is provided with a second magnet above the first magnet, and the first magnet and the second magnet repel each other.

5. The automated grain heavy metal detection apparatus of claim 4, wherein, The sample receiving assembly comprises a sample receiving movement module and a broken rice cup, the sample receiving movement module drives the broken rice cup to move close to or away from the broken rice assembly, a waste outlet is formed in the bottom of the broken rice cup, the waste outlet is connected with a diaphragm pump through a pipeline, the output end of the diaphragm pump is connected with a waste liquid recovery barrel, the waste liquid recovery barrel is arranged below the reaction module, the waste liquid recovery barrel is connected with the switch valve, a push rod valve is movably connected in the broken rice cup, a valve motor is arranged below the broken rice cup of the sample receiving movement module, and the valve motor drives the push rod valve to ascend or descend to open or close the waste outlet.

6. The automated grain heavy metal detection apparatus of claim 5, wherein, The broken rice assembly comprises a backflow cover fixing seat, a broken rice motor, a blade fixing shaft, a broken rice blade and a backflow cover, the broken rice motor is fixedly connected to the surface of the backflow cover fixing seat, the backflow cover is arranged at the bottom of the backflow cover fixing seat, a water inlet pipeline and a liquid inlet pipeline are formed in the backflow cover, the water inlet pipeline is connected with the first peristaltic pump, and the liquid inlet pipeline is connected with the switch valve, the output shaft of the broken rice motor is connected with the blade fixing shaft, and the broken rice blade is fixedly connected to the bottom end of the blade fixing shaft.

7. The automated grain heavy metal detection apparatus of claim 2, wherein, The filling module comprises a first electric push rod and a filling head, the first electric push rod is in transmission connection with the filling head, the filling head comprises a first filling port and a second filling port, and the first filling port and the second filling port are respectively connected with the switch valve through pipelines for filling the second reagent and the supernatant.

8. The automated grain heavy metal detection apparatus of claim 1, wherein, The automatic electrode replacement module comprises an electrode taking assembly and an electrode replacing assembly, The electrode taking assembly comprises an electrode storage box, an electrode taking movement module, a motor fixing plate, a rotary motor and a vacuum suction cup, a plurality of electrode sheets are stacked in the electrode storage box, the electrode taking movement module is arranged on the side surface of the electrode storage box, the electrode taking movement module drives the motor fixing plate to move close to or away from the electrode storage box, the rotary motor is fixedly connected to the motor fixing plate, the output shaft of the rotary motor is connected with a hose connector, the hose connector is fixedly connected with a vacuumizing pipe, and the vacuum suction cup is fixedly connected to the bottom end of the vacuumizing pipe. The electrode replacing assembly comprises an electrode replacing movement module, a clamping jaw fixing seat, an electric clamping jaw and a clamping electrode pressing block, the electrode replacing movement module drives the clamping jaw fixing seat to move close to or away from the electrode seat, the electric clamping jaw is fixedly connected to the clamping jaw fixing seat, and the output shaft of the electric clamping jaw is connected with the clamping electrode pressing block.

9. The automated grain heavy metal detection apparatus of claim 5, wherein, The washing module comprises a washing fixing plate, a second electric push rod and a washing joint, the washing fixing plate is fixed to the side of the waste liquid recovery barrel, the second electric push rod is fixedly connected to the washing fixing plate, the second electric push rod is in transmission connection with the washing joint, the washing joint is connected with a second peristaltic pump through a pipeline, and the second peristaltic pump is connected with the pure water storage container through a pipeline.

10. The automated grain heavy metal detection apparatus of claim 1, wherein, The weighing module comprises a weighing fixing plate, a weighing movement module, a weighing connecting block, a weighing sensor and a scale seat, the weighing fixing plate is arranged below the turntable assembly, the weighing movement module is fixedly connected to the weighing fixing plate, the weighing movement module is in transmission connection with the weighing connecting block, the surface of the weighing connecting block is fixed with the weighing sensor, and the surface of the weighing sensor is fixed with the scale seat.

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