A frozen fruit pesticide residue detection test reagent automatic adding device

Abstract

The utility model discloses a kind of frozen fruit agricultural residue detection reagent automatic adding device, including adding device main part and the display screen for being used to control of being set on adding device main part front side, the adding device main part is powered by connecting external power supply, traditional reagent addition needs to be manually positioned, added, removed to detection container one by one, and operation step is complicated and time-consuming.And the innovation point is placed by the circumferential distribution of the symmetrical design and containing groove of rotating cross plate, multiple detection medicine bottles can be placed at one time, user only needs to push rotating cross plate, with the magnetic attraction positioning of magnet and magnetic plate, medicine bottle can be accurately moved to the lower side of output pipe quickly, without repeatedly adjusting medicine bottle position;After adding is completed, continue to rotate cross plate to switch to next medicine bottle, greatly reduce the time cost of manual positioning and handling, especially suitable for the scene of multiple batches of frozen fruit samples centralized detection, reduce the working strength of operator.

Description

Technical Field

[0001] This utility model belongs to the technical field of automatic reagent addition devices, specifically relating to an automatic reagent addition device for pesticide residue testing in frozen fruit. Background Technology

[0002] The automatic reagent dispensing device for frozen fruit pesticide residue testing is an automated auxiliary device used to precisely control the amount of reagent added. Its core function is to achieve quantitative reagent addition through a combination of mechanical structure and weighing feedback. A micro-pump serves as the power unit, connected to a storage cylinder containing the reagents. This pump draws the liquid reagent from the cylinder and delivers it to the target vial. An electronic scale below supports the vial containing the reagent, weighing it in real time and providing weight data. The weight change indicates whether the reagent dosage has reached the preset standard, indirectly controlling the micro-pump's operation. This ensures that the amount of reagent added each time accurately meets the testing requirements, reducing errors from manual addition and improving the efficiency and accuracy of pesticide residue testing.

[0003] Traditional reagent addition requires manual positioning, addition, and removal of each test container, which is cumbersome and time-consuming, and lacks a multi-batch reagent addition structure. Utility Model Content

[0004] The purpose of this invention is to provide an automatic reagent addition device for testing pesticide residues in frozen fruit, so as to solve the problems in the above-mentioned background technology where the traditional reagent addition requires manual positioning, addition and removal of each test container, which is cumbersome and time-consuming, and lacks a multi-batch reagent addition structure.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an automatic addition device for pesticide residue testing reagents in frozen fruit, comprising an addition device body and a display screen disposed on the front side of the addition device body for operation;

[0006] The main body of the adding device is powered by an external power source. An output pump is located on the outer side of the front middle of the main body of the adding device, and an output pipe is located on the lower middle of the output pump.

[0007] A storage cylinder is connected to the upper rear side of the main body of the adding device. A micro pump is installed inside the main body of the adding device and is connected to the storage cylinder. An input passage is connected to the left side of the output pump and the connection point of the main body of the adding device.

[0008] An electronic scale is protruding from the lower front side of the main body of the adding device. An intermediate shaft cylinder is provided in the middle of the electronic scale. A rotating cross plate is provided on the outer side of the intermediate shaft cylinder. Receiving grooves are opened at the four corners of the rotating cross plate, and magnets are provided on the upper side of the four corner ends of the rotating cross plate.

[0009] A magnetic plate is installed on the upper front side of the electronic scale.

[0010] Preferably, the intermediate shaft cylinder and the electronic scale are fixedly connected, the rotating cross plate can rotate on the electronic scale through the intermediate shaft cylinder, and the receiving slot contains a medicine bottle for loading test reagents.

[0011] Preferably, the magnet is connected to the rotating cross plate by bolts, and the magnetic plate is fixed to the electronic scale by bolts, with the magnet and the magnetic plate attracting each other magnetically.

[0012] Preferably, the upper and lower ends of the left side of the main body of the adding device are respectively provided with fixing frames, and the liquid level display tube is provided inside the fixing frames.

[0013] Preferably, one side of the lower end of the liquid level display tube extends into the main body of the adding device and communicates with the storage cylinder, and the other side of the lower end of the liquid level display tube communicates with the micro pump inside the main body of the adding device, and is pumped into the input passage via the micro pump to supply the output pump.

[0014] Preferably, the electronic scale and the main body of the adding device are connected via Bluetooth communication, and the weighing data can be transmitted to the main body of the adding device.

[0015] Compared with the prior art, this utility model provides an automatic dosing device for pesticide residue testing reagents in frozen fruit, which has the following beneficial effects:

[0016] 1. Traditional reagent addition requires manual positioning, addition, and removal of each test container, a cumbersome and time-consuming process. This innovation, however, utilizes a symmetrical design of a rotating crossplate and a circular distribution of the receiving slots to hold multiple test vials simultaneously. Users simply push the rotating crossplate, using the magnetic attraction between the magnet and the plate to quickly and accurately move the vial to the underside of the output tube, eliminating the need for repeated adjustments. After addition, simply rotate the crossplate to switch to the next vial, significantly reducing the time and cost of manual positioning and handling. This is particularly suitable for scenarios involving the centralized testing of multiple batches of frozen fruit samples, reducing the workload of operators.

[0017] 2. When manually positioning the testing container, visual judgment errors or hand tremors can easily cause the container to deviate from directly below the output tube, resulting in reagent splashing or inaccurate dosage, affecting the test results. This innovation uses magnetic positioning to achieve "stop upon rotation," ensuring that the medicine bottle is precisely aligned with the output tube each time it stops, avoiding reagent addition deviation. At the same time, the intermediate shaft avoids the core area of ​​the electronic scale sensor, and the medicine bottle directly contacts the weighing surface of the electronic scale, reducing interference from the rotating structure on weight transfer, ensuring the accuracy of the electronic scale's weighing data, further improving the metrological accuracy of reagent addition, and reducing the risk of test result deviations caused by positioning or weighing errors.

[0018] 3. The receiving tank has a through-type structure and its size is adapted to the medicine bottle, which can stabilize and limit the position of the medicine bottle, preventing the medicine bottle from tipping over or colliding during rotation; at the same time, the medicine bottle does not need to be frequently removed and placed from the device, reducing the number of times the medicine bottle comes into contact with the external environment and reducing the risk of reagent contamination due to exposure. It is especially suitable for the detection of pesticide residues in frozen fruits with high cleanliness requirements, ensuring the purity of the test sample and the reliability of the test results.

[0019] 4. Traditional devices require opening the measuring cylinder lid to check the remaining reagent level, which is not only cumbersome but also prone to reagent evaporation or contamination. Furthermore, failure to detect reagent shortages promptly can lead to sudden interruptions during refilling, affecting the testing progress. The liquid level display tube, utilizing the principle of communicating vessels, provides a clear view of the reagent level in the measuring cylinder. Users can quickly determine reagent sufficiency before, during, or between refills without opening the measuring cylinder. When the level is too low, reagent can be added in advance, preventing interruptions due to reagent depletion and ensuring the continuity of pesticide residue testing in frozen fruit.

[0020] Furthermore, during reagent addition, problems such as pipe blockage or micropump malfunction can easily lead to poor reagent delivery, and traditional devices struggle to quickly pinpoint the cause of the malfunction. The liquid level display tube can reflect the reagent flow status in real time: if the liquid level does not drop or the rate of drop is abnormal, a preliminary diagnosis of a pipe or micropump malfunction can be made. Operators can quickly troubleshoot without disassembling the device, reducing the time and difficulty of troubleshooting, lowering the professional threshold for device maintenance, ensuring timely resolution of faults, and minimizing downtime affecting testing. Attached Figure Description

[0021] Figure 1 This is a structural schematic diagram of the main body of the device added in this utility model from a frontal view.

[0022] Figure 2 In this utility model Figure 1 A magnified diagram of the area where the rotating crossplate is located.

[0023] Figure 3 In this utility model Figure 1 A magnified structural diagram of the liquid level display tube area.

[0024] Figure 4 In this utility model Figure 1 A structural diagram from a side view.

[0025] In the diagram: 1. Display screen; 2. Main body of the adding device; 3. Electronic scale; 4. Storage cylinder; 5. Fixture; 6. Liquid level display tube; 7. Output pump; 8. Output pipe; 9. Magnetic plate; 10. Intermediate shaft cylinder; 11. Rotating cross plate; 12. Receiving tank; 13. Magnet; 14. Input passage. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] This utility model provides, for example Figure 1-4 The automatic dosing device for pesticide residue testing reagents in frozen fruit shown includes a dosing device body 2 and a display screen 1 for operation on the front side of the dosing device body 2.

[0028] The main body 2 of the adding device is powered by an external power source. An output pump 7 is located on the front middle of the main body 2. An output pipe 8 is located on the lower middle of the output pump 7. A storage cylinder 4 is connected to the upper rear side of the main body 2. A micro pump is located inside the main body 2 and is connected to the storage cylinder 4. An input passage 14 is connected to the left side of the output pump 7 and the connection point of the main body 2. An electronic scale 3 is protruding on the lower front side of the main body 2. An intermediate shaft cylinder 10 is located in the middle of the electronic scale 3. A rotating cross plate 11 is located on the outer side of the intermediate shaft cylinder 10. A receiving groove 12 is opened at each of the four corners of the rotating cross plate 11. A magnet 13 is located on the upper side of the four corner ends of the rotating cross plate 11.

[0029] A magnetic plate 9 is provided on the upper front side of the electronic scale 3. The electronic scale 3 and the main body 2 of the adding device are connected via Bluetooth and the weighing data can be transmitted to the main body 2 of the adding device.

[0030] In this embodiment, the user needs to place the main body 2 of the adding device on a horizontal and stable experimental platform to ensure that the protruding part of the electronic scale 3 is not obstructed; connect the external power supply through the power interface of the main body 2 of the adding device, and after powering on, the device enters the standby state, and the display screen 1 lights up and displays the initial interface.

[0031] Next, slowly inject the reagents required for frozen fruit pesticide residue testing into the measuring cylinder 4 until the reagent level reaches 2 / 3-3 / 4 of the volume of the measuring cylinder 4 (avoid overflow). Operate through the display screen 1 to enter the "pipeline venting" mode. The built-in micro pump starts and slowly pumps the reagent in the measuring cylinder 4 into the input passage 14 to expel the air in the pipeline. After ensuring that there are no air bubbles at the end of the output tube 8, end the venting mode and select the "frozen fruit pesticide residue testing" program on the display screen 1. Set the reagent addition amount (such as the volume of a single reagent) and addition speed according to the testing requirements. Place the empty test container bottle in the weighing area of ​​the electronic scale 3 and lightly touch the "tare" button on the display screen 1. The electronic scale 3 will return to zero, completing the weighing preparation.

[0032] The user can move the test container directly below the output tube 8 and click "Start Adding" on the display screen 1. The built-in micro pump will start, and the reagent in the storage cylinder 4 will be transported to the output pump 7 through the input passage 14. After being pressurized, the output pump 7 will spray the reagent evenly into the test container through the output tube 8. During the addition process, the electronic scale 3 will weigh the reagent in real time (and convert it to volume, combined with the preset reagent density value), and transmit the weighing data to the main body 2 of the adding device via Bluetooth. The display screen 1 will simultaneously display the real-time addition amount. When the addition amount reaches the set value, the micro pump and the output pump 7 will automatically stop, completing a single reagent addition.

[0033] Preferably, the main body 2 of the adding device is powered by an external power source, and the built-in main control board provides a stable voltage for components such as the display screen 1, the micro pump, the output pump 7, and the electronic scale 3. The display screen 1 serves as a human-machine interface, which can receive user operation commands (such as parameter setting and mode selection) and transmit the commands to the main control board. The main control board controls the start and stop of the micro pump and the output pump 7 and their operating parameters to achieve automated control of reagent addition.

[0034] Preferably, the main body 2 of the adding device has a built-in micro pump to provide power for reagent delivery. Its inlet end is connected to the storage cylinder 4, and its outlet end is connected to the input passage 14 through a pipeline. After starting, the impeller inside the micro pump rotates to generate negative pressure, which draws the reagent in the storage cylinder 4 and then pushes the reagent to the input passage 14 through pressure. The input passage 14 is made of chemical corrosion resistant material (PTFE) to avoid the reagent reacting with the pipeline. The output pump 7 is a pressure boosting component that can adjust the reagent output pressure to ensure that the reagent sprayed from the output pipe 8 is a stable liquid flow (non-atomized) and accurately injected into the detection container to avoid reagent splashing and causing measurement errors.

[0035] The electronic scale 3 has a built-in pressure sensor and Bluetooth module. When the reagent is injected into the testing container, the pressure sensor senses the weight change and converts it into an electrical signal. The processor inside the electronic scale 3 processes the signal into weighing data. The Bluetooth module wirelessly transmits the data to the Bluetooth receiver module inside the main body 2 of the adding device. After receiving the data, the main control board displays it in real time on the display screen 1 and compares it with the set amount to be added. When the set value is reached, a stop command is triggered, realizing a closed-loop control of "addition-weighing-monitoring" and improving the accuracy of reagent addition.

[0036] The mounting bracket 5 is symmetrically fixed to the upper and lower ends of the left side of the main body 2 of the adding device by bolts. The mounting slot is reserved inside to fix the liquid level display tube 6, so as to ensure that the liquid level display tube 6 remains stable during the operation of the device and avoids position displacement due to vibration, which would affect the accuracy of liquid level observation.

[0037] like Figure 1-3As shown, the intermediate shaft cylinder 10 and the electronic scale 3 are fixedly connected. The rotating cross plate 11 can rotate on the electronic scale 3 through the intermediate shaft cylinder 10. The container 12 contains a medicine bottle for loading test reagents. The magnet 13 is connected to the rotating cross plate 11 by bolts. The magnetic plate 9 is fixed on the electronic scale 3 by bolts. The magnet 13 and the magnetic plate 9 are magnetically attracted to each other. The upper and lower ends of the left side of the main body 2 of the adding device are respectively provided with a fixing frame 5. The liquid level display tube 6 is provided inside the fixing frame 5.

[0038] like Figure 1 as well as Figure 3-4 As shown, one side of the lower end of the liquid level display tube 6 extends into the main body 2 of the adding device and is connected to the storage cylinder 4. The other side of the lower end of the liquid level display tube 6 is connected to the micro pump inside the main body 2 of the adding device and is pumped into the input passage 14 via the micro pump to supply the output pump 7.

[0039] Preferably, the intermediate shaft cylinder 10 is a cylindrical structure, fixed in the middle position of the electronic scale 3 by welding or bolts (avoiding the core area of ​​the pressure sensor of the electronic scale 3 to reduce the influence of symmetry measurement error); the rotating cross plate 11 is a cross-shaped flat plate structure with a circular hole in the center that matches the intermediate shaft cylinder 10, and is fitted on the outside of the intermediate shaft cylinder 10, allowing it to rotate freely around the intermediate shaft cylinder 10; the receiving groove 12 is a through rectangular groove, symmetrically distributed at its four corners along the circumference of the rotating cross plate 11, and the size of the groove matches the outer diameter of the medicine bottle (such as centrifuge tube, reagent bottle) to ensure that the medicine bottle can be placed stably and its bottom contacts the weighing surface of the electronic scale 3; the magnet 13 is a block permanent magnet, fixed to the upper side of the ends of the four corners of the rotating cross plate 11 by bolts; the magnetic plate 9 is a sheet magnetic material, fixed to the upper front side of the electronic scale 3 by bolts, and its position corresponds to the magnet 13, and the two can be positioned by magnetic attraction.

[0040] Preferably, the user can place four vials containing frozen fruit test samples (containers that need to be filled with reagents) into the four corner slots 12 of the rotating cross plate 11, ensuring that the bottom of the vials is in close contact with the surface of the electronic scale 3; gently push the rotating cross plate 11 to make it rotate around the central shaft cylinder 10, observe the position of the magnet 13 and the magnetic plate 9, when a magnet 13 is close to the magnetic plate 9, the two generate a magnetic attraction force, and the rotating cross plate 11 automatically stops rotating. At this time, the vial in the corresponding slot 12 is exactly below the output tube 8, completing the initial positioning.

[0041] After confirming the accurate positioning of the medicine bottle via display screen 1, start the "batch addition" mode. The output tube 8 sprays the set amount of test reagent into the currently positioned medicine bottle. After addition is completed, manually push the rotating cross plate 11 to overcome the magnetic attraction between magnet 13 and magnetic plate 9, and continue to rotate until the next magnet 13 and magnetic plate 9 are attracted. At this time, the medicine bottle in the next receiving tank 12 moves to the bottom of the output tube 8. Repeat the above addition steps until all 4 medicine bottles have been added with reagent.

[0042] After all medicine bottles have been added, rotate the cross plate 11 in the opposite direction to return it to its initial position, and then remove the medicine bottles from the receiving slot 12 for subsequent frozen fruit pesticide residue testing. If you need to add more, repeat the above "placement-positioning-addition" process.

[0043] Preferably, the rotating cross plate 11 adopts a symmetrical structure, the receiving grooves 12 are symmetrically distributed around the circumference, and the intermediate shaft cylinder 10 is fixed in the middle of the electronic scale 3 (avoiding the core area of ​​the sensor). This ensures that the overall center of gravity of the rotating cross plate 11 is always within the weighing center range of the electronic scale 3 during the rotation process, reducing the weighing error caused by the center of gravity shift. At the same time, the bottom of the medicine bottle directly contacts the electronic scale 3, avoiding interference of the rotating cross plate 11 on the weight transfer of the medicine bottle, and improving the weighing accuracy after the reagent is added.

[0044] The magnet 13 and the magnetic plate 9 are positioned by permanent magnet attraction. The magnetic attraction strength is set to "easily push the rotating cross plate 11 and there is no slippage when it stops". This ensures that the medicine bottle is accurately aligned with the output tube 8 when the rotating cross plate 11 stops, and avoids positioning deviation caused by excessive magnetic attraction or insufficient magnetic attraction. The magnetic positioning replaces the traditional mechanical buckle, which simplifies the operation steps and improves the efficiency of batch addition. It is especially suitable for scenarios where multiple frozen fruit samples are tested at the same time.

[0045] The liquid level display tube 6 is a tubular structure made of transparent glass or chemically resistant plastic, and is fixed to the outside of the left side of the main body 2 of the adding device by the fixing bracket 5. Its lower end is divided into two branches. One branch extends into the interior of the main body 2 of the adding device and connects to the bottom or side wall of the storage cylinder 4. The other branch connects to the inlet end of the micro pump built into the main body 2 of the adding device. The liquid level display tube 6 is marked with scale lines on the outside to intuitively display the height of the reagent liquid level in the tube.

[0046] Before, during, and between additions to the device, users can observe the reagent level in the liquid level display tube 6 to determine the remaining amount of reagent in the storage cylinder 4. When the liquid level is below the "minimum warning level" of the scale, the device power should be turned off, the storage cylinder 4 should be opened, and the test reagent should be added to the "normal level" to avoid interruption of addition due to insufficient reagent.

[0047] If, during the reagent addition process, the liquid level in the level display tube 6 does not drop or drops at an abnormal rate, it can be preliminarily determined that there is a fault in the micro pump or pipeline (such as pipeline blockage or micro pump not starting). At this time, the addition should be stopped, and the connection status of the input passage 14, micro pump and level display tube 6 should be checked. The operation can be continued after the fault is eliminated.

[0048] A branch at the lower end of the liquid level display tube 6 is connected to the measuring cylinder 4, forming a communicating vessel structure. According to the principle of communicating vessels, the reagent liquid level in the measuring cylinder 4 is the same as the liquid level in the liquid level display tube 6. Therefore, by observing the liquid level in the liquid level display tube 6, the amount of reagent stored in the measuring cylinder 4 can be directly obtained without opening the measuring cylinder 4, thus avoiding reagent evaporation or contamination.

[0049] Another branch of the liquid level display tube 6 is connected to the inlet of the micro pump, which can serve as a "buffer section" for reagents to enter the micro pump, preventing the micro pump from drawing in air due to fluctuations in the reagent in the storage cylinder 4. At the same time, the transparent liquid level display tube 6 allows for direct observation of whether there are any abnormal phenomena such as turbidity or precipitation in the reagents, enabling early detection of reagent deterioration and ensuring the accuracy of pesticide residue testing results for frozen fruits.

[0050] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An automatic dosing device for pesticide residue testing reagents in frozen fruit, comprising a dosing device body (2) and a display screen (1) disposed on the front side of the dosing device body (2) for operation; The main body (2) of the adding device is powered by connecting to an external power source. An output pump (7) is provided on the front middle of the main body (2), and an output pipe (8) is provided on the lower middle of the output pump (7). The upper rear side of the main body (2) of the adding device is connected to a storage cylinder (4). A micro pump is installed inside the main body (2) of the adding device, and the micro pump is connected to the storage cylinder (4). An input passage (14) is connected to the left side of the output pump (7) and the connection point of the main body (2) of the adding device. characterized in that An electronic scale (3) is provided on the lower front side of the main body (2) of the adding device. An intermediate shaft cylinder (10) is provided in the middle of the electronic scale (3). A rotating cross plate (11) is provided on the outer side of the intermediate shaft cylinder (10). A receiving groove (12) is provided at each of the four corners of the rotating cross plate (11). A magnet (13) is provided on the upper side of each of the four corner ends of the rotating cross plate (11). A magnetic plate (9) is provided on the upper front side of the electronic scale (3).

2. The automatic device for adding a test agent for detecting residues of frozen fruits according to claim 1, characterized in that: The intermediate shaft cylinder (10) and the electronic scale (3) are fixedly connected. The rotating cross plate (11) can rotate on the electronic scale (3) through the intermediate shaft cylinder (10). The container slot (12) contains a medicine bottle for loading test reagents.

3. The automatic device for adding a test agent for detecting residues of frozen fruits according to claim 2, characterized in that: The magnet (13) is connected to the rotating cross plate (11) by bolts, and the magnetic plate (9) is fixed to the electronic scale (3) by bolts. The magnet (13) and the magnetic plate (9) are magnetically attracted to each other.

4. The automatic device for adding a test agent for detecting residues of frozen fruits according to claim 3, characterized in that: The upper and lower ends of the left side of the main body (2) of the adding device are respectively provided with a fixing frame (5), and a liquid level display tube (6) is provided inside the fixing frame (5).

5. The automatic device for adding a test agent for detecting residues of frozen fruits according to claim 4, characterized in that: The lower end of the liquid level display tube (6) extends into the main body (2) of the adding device and is connected to the storage cylinder (4). The other end of the lower end of the liquid level display tube (6) is connected to the micro pump inside the main body (2) of the adding device and is pumped into the input passage (14) via the micro pump to supply the output pump (7).

6. The automatic addition device for a frozen fruit pesticide residue test agent according to claim 5, characterized by: The electronic scale (3) and the main body of the adding device (2) are connected via Bluetooth communication and the weighing data can be transmitted to the main body of the adding device (2).

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