Sample pretreatment device of soil heavy metal rapid detector

Abstract

The utility model discloses a soil heavy metal rapid detector sample pretreatment device which comprises a plurality of drying tanks, a bearing frame is installed at the bottom in each drying tank, a rotating mechanism is installed at the lower end of each bearing frame, a conical separation cover is installed on each rotating mechanism, and supporting columns are fixed to the four corners of the upper end of each bearing frame. A microwave generator is adjustably installed on the supporting column, a gas conveying mechanism is installed on the periphery of the upper end of the drying tank, and a sealing cover is detachably installed at the upper end of the drying tank. Each drying tank works independently, cross contamination among different samples can be effectively avoided, independence and accuracy of detection results of each sample are guaranteed, in addition, compared with a traditional drying mode, drying time is greatly shortened, pretreatment efficiency is improved, the whole soil heavy metal detection process is accelerated, and the detection efficiency is improved. The original characteristics of the soil sample are ensured, and the accuracy and the reliability of a detection result are improved.

Description

A sample pretreatment device for a rapid soil heavy metal detector Technical Field

[0001] This invention relates to the field of soil testing technology, and in particular to a sample pretreatment device for a rapid soil heavy metal detector. Background Technology

[0002] In today's environmental science and agricultural fields, soil heavy metal testing is of paramount importance. The heavy metal content in soil not only affects soil quality and crop growth but is also closely related to human health. For example, excessive heavy metal levels can lead to reduced crop yields and lower quality, and through the food chain, pose potential health risks. Therefore, accurate detection of heavy metal content in soil has become a crucial aspect of environmental monitoring and agricultural production.

[0003] However, traditional soil heavy metal detection pretreatment methods have many drawbacks. Traditional drying methods mainly rely on heat conduction and convection, with heat gradually transferred from the outside to the soil interior. This method is inefficient and requires a long drying time. Moreover, the prolonged high-temperature drying process can easily damage the organic matter and heavy metal speciation in the soil. Organic matter is an important component of soil fertility, and its destruction will affect the ecological function of the soil; changes in the speciation of heavy metals will lead to inaccurate detection results, failing to accurately reflect the actual content and state of heavy metals in the soil, thus reducing the detection effectiveness and affecting subsequent environmental assessments and remediation decisions. To address these issues, we propose a sample pretreatment device for a rapid soil heavy metal detector. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a sample pretreatment device for a rapid soil heavy metal detector.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A sample pretreatment device for a rapid soil heavy metal detector includes multiple drying tanks. A support frame is installed at the bottom of each drying tank, and a rotating mechanism is installed at the lower end of the support frame. A conical separation hood is installed on the rotating mechanism. Support columns are fixed at the four corners of the upper end of the support frame, and microwave generators are adjustablely installed on the support columns. A gas supply mechanism is installed around the upper end of each drying tank, and a detachable cap is installed on the upper end of each drying tank.

[0007] Preferably, the rotating mechanism includes a protective box fixed to the lower end of the support frame. A drive motor is installed on one side of the bottom inside the protective box. A gear set is connected to the end of the output shaft of the drive motor. A rotating rod is installed on the gear set. The upper end of the rotating rod passes through the side wall of the protective box and the support frame and is fixed to the lower middle part of the conical separation cover.

[0008] Preferably, one side of the support column is provided with a plurality of threaded blind holes at equal intervals along the vertical direction, one side of the microwave generator is fixed with a fixing ring, one side of the fixing ring is threaded with a stud, and one end of the stud is threaded into one of the threaded blind holes.

[0009] Preferably, the gas delivery mechanism includes two annular nozzles fixedly mounted on the upper end of the drying tank. Four nozzles are connected at equal intervals on the circumferential sidewall of the annular nozzles. One end of each nozzle penetrates the sidewall of the drying tank and extends into the drying tank. A connecting pipe is connected between the two annular nozzles, and one end of the connecting pipe is connected to a gas delivery pipe.

[0010] Preferably, the cap is threaded onto the upper end of the drying tank, a handle is connected to the upper end of the cap, and multiple filter holes are provided at equal intervals around the circumference of the cap.

[0011] Preferably, the number of drying tanks is 3-6.

[0012] In this invention, when it is needed for use, the height of the four microwave generators is adjusted in advance according to the quality of the soil. They can be staggered as needed. Then, the pretreated soil is placed into the drying tank, sealed, and the rotating mechanism drives the conical separation hood to rotate, which improves the separation effect of the soil during microwave heating. At the same time, the gas supply mechanism supplies gas inside the tank for one revolution to further improve the effect. Different numbers of drying tanks can be selected as needed. The modular drying tank supports the simultaneous drying of different samples to avoid cross-contamination.

[0013] The operation process of this utility model is as follows:

[0014] 1. Preparation stage: Adjust the height of the four microwave generators according to the quality of the soil to be treated. Adjust the height of the microwave generators by screwing the studs on one side of the fixing ring into the threaded blind holes at different positions on the support column. The generators can also be staggered according to actual needs to ensure that the microwaves can act on the soil evenly.

[0015] 2. Sample Placement: Place the pre-treated soil sample into the drying container, then screw the cap screwed onto the top of the drying container to seal it. The handle on the cap makes it easy to operate, and the multiple filter holes spaced at equal intervals around the perimeter ensure gas exchange during the drying process.

[0016] 3. Drying process:

[0017] ① Microwave heating and separation: Start the drive motor, the output shaft of the drive motor drives the gear set to rotate, which in turn causes the rotating rod to rotate. The upper end of the rotating rod passes through the side wall of the protective box and the support frame and is fixed to the lower middle of the conical separation hood, thereby driving the conical separation hood to rotate. Under the action of microwave generated by the microwave generator, the rotating conical separation hood can improve the separation effect of the soil, allowing the soil to receive microwave heating more fully and speeding up the drying process.

[0018] ② Gas supply assistance: The gas supply pipe delivers gas to the connecting pipe, which distributes the gas into two annular nozzles. Four nozzles connected at equal intervals on the inner sidewall of the annular nozzles spray the gas into the drying tank, realizing gas supply around the inside and further improving the drying effect.

[0019] ③ Selection and modular operation: Depending on the actual testing needs, different numbers of drying jars can be selected. The modular design of the drying jars supports the simultaneous drying of different samples. Each drying jar works independently, avoiding cross-contamination between different samples.

[0020] This utility model has the following advantages:

[0021] 1. Microwave heating can directly act on water molecules inside the soil, causing the water molecules to vibrate rapidly and generate heat, thereby accelerating the drying speed. Compared with traditional drying methods, it greatly shortens the drying time, improves pretreatment efficiency, and thus speeds up the entire process of soil heavy metal detection.

[0022] 2. Due to the rapid heating speed of microwaves, the soil stays in a high-temperature environment for a shorter period of time, which effectively avoids the damage to soil organic matter and heavy metal forms caused by prolonged high temperatures in traditional drying methods, thus ensuring the original characteristics of soil samples and improving the accuracy and reliability of test results.

[0023] 3. The height of the microwave generator can be adjusted according to the soil quality and can be staggered to adapt to different types and qualities of soil samples. At the same time, different numbers of drying tanks can be selected for use to meet different scales of testing needs. The modular design also supports the simultaneous drying of different samples, improving the versatility and practicality of the device.

[0024] 4. Each drying chamber operates independently, which can effectively avoid cross-contamination between different samples and ensure the independence and accuracy of the test results of each sample. This is especially important for the testing of multiple batches and types of soil samples, and helps to improve the quality and reliability of the test data.

[0025] In summary, each drying chamber of this invention operates independently, effectively avoiding cross-contamination between different samples and ensuring the independence and accuracy of the test results for each sample. In addition, compared with traditional drying methods, it greatly shortens the drying time, improves pretreatment efficiency, and thus accelerates the entire process of soil heavy metal detection, ensuring the original characteristics of soil samples and improving the accuracy and reliability of test results. Attached Figure Description

[0026] Figure 1 is a diagram of the installation structure of the microwave generator of this utility model;

[0027] Figure 2 is a structural diagram of the gas transmission mechanism of this utility model;

[0028] Figure 3 is a structural diagram of the rotating mechanism of this utility model;

[0029] Figure 4 is a diagram of the internal structure of this utility model;

[0030] Figure 5 is a diagram of the cap installation structure of this utility model;

[0031] Figure 6 is a structural diagram of the support column distribution of this utility model;

[0032] Figure 7 is a structural diagram of the modular arrangement of the drying tank of this utility model.

[0033] In the diagram: 1 Microwave generator, 2 Support column, 3 Fixing ring, 4 Bearing frame, 5 Protective box, 6 Threaded blind hole, 7 Conical separation cover, 8 Stud, 9 Gear set, 10 Drive motor, 11 Rotating rod, 12 Nozzle, 13 Connecting pipe, 14 Gas supply pipe, 15 Annular nozzle, 16 Drying tank, 17 Cover. Detailed Implementation

[0034] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0035] Referring to Figures 1-7, a sample pretreatment device for a rapid soil heavy metal detector includes multiple drying tanks 16. A support frame 4 is installed at the bottom of the drying tank 16. A rotating mechanism is installed at the lower end of the support frame 4. A conical separation cover 7 is installed on the rotating mechanism. Support columns 2 are fixed at the four corners of the upper end of the support frame 4. A microwave generator 1 is adjustablely installed on the support columns 2. A gas supply mechanism is installed around the upper end of the drying tank 16. A cap 17 is detachably installed on the upper end of the drying tank 16.

[0036] The rotating mechanism includes a protective box 5 fixed to the lower end of the support frame 4. A drive motor 10 is installed on one side of the bottom inside the protective box 5. A gear set 9 is connected to the end of the output shaft of the drive motor 10. A rotating rod 11 is installed on the gear set 9. The upper end of the rotating rod 11 passes through the side wall of the protective box 5 and the support frame 4 and is fixed to the lower middle of the conical separation cover 7. The drive motor 10 drives the gear set 9 to rotate, thereby causing the rotating rod 11 to rotate, thus realizing the rotation of the conical separation cover 7.

[0037] The support column 2 has multiple threaded blind holes 6 evenly spaced along the vertical direction on one side. A fixing ring 3 is fixed on one side of the microwave generator 1. A stud 8 is threaded through one side of the fixing ring 3. One end of the stud 8 is threaded into one of the threaded blind holes 6, which facilitates installation and disassembly. This allows the height of the microwave generator 1 to be flexibly adjusted according to the quality and properties of the soil. Different qualities of soil have different microwave requirements during the drying process. By adjusting the height of the microwave generator 1, the microwave can be applied to the soil more evenly, thus improving the drying effect.

[0038] The gas delivery mechanism includes two annular nozzles 15 fixedly mounted on the upper end of the drying tank 16. Four nozzles 12 are connected at equal intervals on the circumferential sidewall of the annular nozzles 15. One end of each nozzle 12 penetrates the sidewall of the drying tank 16 and extends into the drying tank 16. A connecting pipe 13 is connected between the two annular nozzles 15. One end of the connecting pipe 13 is connected to a gas delivery pipe 14. Gas enters the connecting pipe 13 through the gas delivery pipe 14, is then distributed to the two annular nozzles 15, and is finally sprayed into the drying tank 16 by the nozzles 12. The gas delivery method can accelerate the air flow on the soil surface, remove moisture from the soil, and further improve the drying effect.

[0039] The cover 17 is screwed onto the upper end of the drying tank 16. A handle is connected to the upper end of the cover 17. Multiple filter holes are provided at equal intervals around the cover 17. During the drying process, the moisture in the soil will evaporate to form water vapor. The filter holes can ensure that water vapor and other gases can be smoothly discharged from the drying tank 16, while preventing external dust and other impurities from entering and ensuring a clean drying environment.

[0040] The number of drying jars 16 is 3-6, which are modularly set up. Each drying jar works independently, which can effectively avoid cross-contamination between different samples and ensure the independence and accuracy of the test results of each sample.

[0041] In this invention, when it is needed for use, the height of the four microwave generators 1 is adjusted in advance according to the quality of the soil. They can be staggered as needed. Then, the pretreated soil is placed into the drying tank 16, the cover 17 is sealed, and the rotating mechanism drives the conical separation hood 7 to rotate, which improves the separation effect of the soil during microwave heating. At the same time, the gas supply mechanism supplies gas inside the tank for one revolution to further improve the effect. Different numbers of drying tanks 16 can be selected as needed. The modular drying tank 16 supports the simultaneous drying of different samples to avoid cross-contamination.

[0042] The operation process of this utility model is as follows:

[0043] 1. Preparation stage: Adjust the height of the four microwave generators 1 according to the quality of the soil to be treated. Adjust the height of the microwave generators 1 by screwing the studs 8 on one side of the fixing ring 3 into the threaded blind holes 6 at different positions on the support column 2. The microwave generators 1 can be staggered according to actual needs to ensure that the microwaves can act on the soil evenly.

[0044] 2. Sample placement: Place the pre-treated soil sample into the drying container 16, and then screw the cap 17 onto the top of the drying container 16 to seal the drying container 16. The handle on the cap 17 makes it easy to operate, and the multiple filter holes set at equal intervals around the perimeter can ensure gas exchange during the drying process.

[0045] 3. Drying process:

[0046] ① Microwave heating and separation: Start the drive motor 10. The output shaft of the drive motor 10 drives the gear set 9 to rotate, which in turn causes the rotating rod 11 to rotate. The upper end of the rotating rod 11 passes through the side wall of the protective box 5 and the support frame 4 and is fixed to the lower middle of the conical separation cover 7, thereby driving the conical separation cover 7 to rotate. Under the action of microwave generated by the microwave generator 1, the rotating conical separation cover 7 can improve the separation effect of the soil, make the soil more fully accept microwave heating, and speed up the drying speed.

[0047] ② Gas supply assistance: Gas supply pipe 14 delivers gas to connecting pipe 13, connecting pipe 13 distributes gas to two annular nozzles 15, and four nozzles 12 connected at equal intervals on the inner circumference side wall of the annular nozzles 15 spray gas into the drying tank 16, realizing gas supply around the inside and further improving the drying effect.

[0048] ③ Selection and modular operation: Depending on the actual testing needs, different numbers of drying jars 16 can be selected. The modular design of the drying jars 16 supports the simultaneous drying of different samples. Each drying jar 16 works independently, avoiding cross-contamination between different samples.

[0049] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. A sample pretreatment device for a rapid soil heavy metal detector, comprising multiple drying tanks (16), characterized in that, A support frame (4) is installed at the bottom of the drying tank (16). A rotating mechanism is installed at the lower end of the support frame (4). A conical separation cover (7) is installed on the rotating mechanism. Support columns (2) are fixed at the four corners of the upper end of the support frame (4). A microwave generator (1) is adjustablely installed on the support column (2). A gas conveying mechanism is installed around the upper end of the drying tank (16). A cap (17) is detachably installed on the upper end of the drying tank (16).

2. The sample pretreatment device for a rapid soil heavy metal detector according to claim 1, characterized in that: The rotating mechanism includes a protective box (5) fixed to the lower end of the support frame (4). A drive motor (10) is installed on one side of the bottom inside the protective box (5). A gear set (9) is connected to the end of the output shaft of the drive motor (10). A rotating rod (11) is installed on the gear set (9). The upper end of the rotating rod (11) passes through the side wall of the protective box (5) and the support frame (4) and is fixed to the lower middle part of the conical separation cover (7).

3. The sample pretreatment device for a rapid soil heavy metal detector according to claim 1, characterized in that: The support column (2) has multiple threaded blind holes (6) spaced at equal intervals along the vertical direction on one side. The microwave generator (1) is fixed with a fixing ring (3) on one side. A stud (8) is threaded through one side of the fixing ring (3). One end of the stud (8) is threaded into one of the threaded blind holes (6).

4. The sample pretreatment device for a rapid soil heavy metal detector according to claim 1, characterized in that: The gas delivery mechanism includes two annular nozzles (15) fixedly mounted on the upper end of the drying tank (16). Four nozzles (12) are connected at equal intervals on the side wall of the annular nozzles (15). One end of each nozzle (12) penetrates the side wall of the drying tank (16) and extends into the drying tank (16). A connecting pipe (13) is connected between the two annular nozzles (15). One end of the connecting pipe (13) is connected to a gas delivery pipe (14).

5. The sample pretreatment device for a rapid soil heavy metal detector according to claim 1, characterized in that: The cap (17) is threaded onto the upper end of the drying tank (16), and a handle is connected to the upper end of the cap (17). Multiple filter holes are provided at equal intervals around the cap (17).

6. The sample pretreatment device for a rapid soil heavy metal detector according to claim 1, characterized in that: The number of the drying tanks (16) is 3-6.

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