Solid food heavy metal microwave digestion device

Abstract

The utility model relates to the technical field of food detection, in particular to a solid food heavy metal microwave digestion device, which enables the action of a solid food sample and microwaves to be more uniform and improves the digestion efficiency by enabling the moving track of a digestion tank to be more complex. Comprising a box body and a controller, a horizontal partition plate is installed at the bottom of the box body, the rotary table is rotatably installed on the horizontal partition plate, an output shaft of the speed reduction motor is connected with the center of the lower end face of the rotary table, the multiple rotary seats are rotatably installed on the rotary table, and the multiple rotary seats are rotatably installed on the rotary table; the plurality of rotating seats are circumferentially and uniformly arranged around the circle center of the rotating disc, outer gear rings I are concentrically mounted on the outer walls of the plurality of rotating seats, inner gear rings I are mounted on the horizontal partition plate, the inner gear rings I are meshed with the plurality of outer gear rings I, loading mechanisms are mounted in the plurality of rotating seats, and the plurality of digestion tanks are detachably mounted on the plurality of loading mechanisms respectively.

Description

Technical Field

[0001] This utility model relates to the technical field of food testing, and in particular to a microwave digestion device for heavy metals in solid food. Background Technology

[0002] Microwave digestion is commonly used to detect heavy metal content in solid foods. Various microwave digestion devices for heavy metals in food have been proposed in the prior art. For example, Chinese utility model patent CN218389666U discloses a microwave digestion device for heavy metal ions in solid foods. This device includes a housing with a control touchscreen at the top; a rotating disk rotatably mounted inside the housing; a placement tray placed on top of the rotating disk, with multiple placement cylinders arranged in a circular array; digestion containers, corresponding one-to-one with the placement cylinders and placed inside them; and a precision placement mechanism installed inside the housing for positioning the placement tray. The device includes an internal frame with a top frame at the front and an arc-shaped surface on the side wall of the top frame, the contour of which complements the outer contour of the placement tray. The advantage of this invention is that by adjusting the position of the top frame, the placement tray can be directly placed on the rotating disk so that it abuts against the top frame, achieving precise placement in one step without requiring multiple position adjustments.

[0003] However, after the microwave digestion device is placed, the digestion vessel only revolves around the central axis with the rotating disk and cannot rotate on its own axis. This results in a single movement trajectory of the digestion vessel and uneven interaction with the microwaves, which affects the digestion efficiency. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides a microwave digestion device for heavy metals in solid food by making the operating trajectory of the digestion tank more complex, making the interaction between the solid food sample and the microwave more uniform, and improving the digestion efficiency.

[0005] This utility model discloses a microwave digestion device for heavy metals in solid food, comprising a housing and a controller. The housing contains a digestion chamber with a microwave generator inside. The controller is mounted on the housing. The device also includes a turntable, a geared motor, multiple rotating seats, multiple external gear rings, multiple internal gear rings, multiple digestion containers, and multiple loading mechanisms. A horizontal partition is installed at the bottom of the digestion chamber. The turntable is rotatably mounted on the horizontal partition. The geared motor is mounted below the horizontal partition, and its output shaft is connected to the center of the lower end face of the turntable. Multiple rotating seats are rotatably mounted on the turntable and are evenly arranged around the center circumference of the turntable. External gear rings are concentrically mounted on the outer walls of each rotating seat. Internal gear rings are mounted on the horizontal partition. The internal gear rings and multiple external gear rings... In this system, multiple rotating seats are equipped with loading mechanisms, and multiple digestion vessels are detachably mounted on these loading mechanisms. During testing, solid food samples are placed into multiple digestion vessels, which are then loaded onto the loading mechanisms. The microwave generator inside the chamber is activated, and a geared motor drives a turntable to rotate. The turntable causes multiple rotating seats to rotate around the output shaft of the geared motor. Simultaneously, multiple external gear rings mesh with internal gear rings, causing each rotating seat to rotate around its own axis. This, in turn, causes multiple digestion vessels to revolve around the output shaft of the geared motor while simultaneously rotating around their own axes. This increases the complexity of the digestion vessel's trajectory, resulting in more uniform interaction between the solid food samples and microwaves within the digestion vessels, thus improving digestion efficiency.

[0006] Preferably, the loading mechanism includes a tray, a rotating shaft, a sliding rod, and a ball joint. The tray is located inside the rotating seat, and the digestion vessel is detachably inserted into the tray. The front and rear sides of the tray rotate with the rotating seat via the rotating shaft, and the left and right sides of the tray slide vertically to the vertical grooves on the inner wall of the rotating seat via the sliding rod. The upper end of the ball joint is connected to the end of the sliding rod via a ball joint, and the lower end of the ball joint is connected to the turntable via a ball joint. Inserting the digestion vessel into the tray completes the sample placement. When the rotating seat rotates, the rotating shaft and sliding rod drive the tray and digestion vessel to rotate. The end of the slide rod is restricted and pulled by the ball joint, so the three-dimensional distance between the end of the slide rod and the lower end of the ball joint remains constant. Since the distance between the end of the slide rod and the lower end of the ball joint in the horizontal direction changes constantly, the distance between the end of the slide rod and the lower end of the ball joint in the vertical direction also changes constantly. This causes the slide rod to slide up and down along the vertical groove of the rotating seat, thereby driving the tray and digestion vessel to swing back and forth around the axis of rotation. This further increases the complexity of the motion trajectory of the digestion vessel, making the solid food samples in multiple digestion vessels interact more evenly with the microwaves and improving the digestion efficiency.

[0007] Preferably, it also includes multiple insert rods, and multiple horizontal grooves are arranged radially on the turntable. The multiple insert rods are slidably inserted into the multiple horizontal grooves respectively, and the lower ends of multiple ball joints are connected to the multiple insert rods through ball joints. Adjusting the position of the multiple insert rods in the multiple horizontal grooves can adjust the horizontal distance between the lower ends of the multiple ball joints and the ends of the multiple slide rods, thereby adjusting the vertical sliding distance of the multiple slide rods, and thus adjusting the amplitude of the tray swinging back and forth around the rotating axis.

[0008] Preferably, the device also includes multiple track wheels and track rings. The outer ends of the multiple insert rods extend beyond the outside of the turntable, and track wheels are rotatably mounted on the outer ends of the multiple insert rods. The track ring is located outside the turntable, and the multiple track wheels are in rolling connection with the track ring. The track ring is eccentrically arranged with the turntable. When the turntable rotates, the turntable drives the multiple insert rods to rotate together, and the multiple track wheels roll along the track ring. Because the track ring is eccentrically arranged with the turntable, the distance that the track wheels drive the insert rods to extend beyond the turntable is different when the turntable rotates at different angles. This automatically adjusts the position of the multiple insert rods in the multiple horizontal grooves, thereby achieving automatic adjustment of the pallet swing amplitude.

[0009] Preferably, it also includes gear one, gear two, and internal gear ring two. Gear one is concentrically fixed on the output shaft of the geared motor. Gear two is rotatably mounted on the horizontal partition of the housing and meshes with gear one. The upper end of internal gear ring two is connected to a rotating seat through an eccentric bracket, which is rotatably mounted on the output shaft of the geared motor. Internal gear ring two meshes with gear two and is concentric with gear one. A track ring is rotatably mounted on the output shaft of the geared motor through an eccentric bracket. When the geared motor drives the turntable to rotate through the output shaft, it also drives gear one to rotate. The meshing drive gear two rotates, gear two meshes and drives internal gear ring two to rotate, internal gear ring two drives the track ring to rotate. Since gear one meshes externally with gear two, and gear two meshes internally with internal gear ring two, the rotation directions of the turntable and the track ring are opposite. This allows the angle between the center of the track ring and the center of the turntable to be adjusted at all times. As a result, the effect of the track ring on the position adjustment of multiple track wheels and multiple insert rods changes constantly, further increasing the complexity of the motion trajectory of the digestion vessel. This makes the solid food samples in multiple digestion vessels interact more evenly with the microwave, thus improving the digestion efficiency.

[0010] Preferably, the device also includes multiple spring plates and multiple limiting blocks. Each of the multiple trays has a vertical limiting groove inside, with an opening on the end face of the tray. Each of the multiple digestion containers has a vertical groove on its outer wall. Multiple spring plates are located in the grooves of the multiple digestion containers, with the upper ends of the spring plates connected to the outer walls of the containers. Each of the lower ends of the spring plates is fitted with a limiting block, which matches the limiting groove of each tray. The elasticity of the spring plates causes the limiting blocks to extend beyond the outer walls of the digestion containers. When a digestion container is inserted into the tray, the limiting block is inserted into the limiting groove of the tray, thus limiting the relative angular position of the digestion container and the tray. Pressing the spring plate inward causes the limiting block to retract into the groove of the digestion container and disengage from the limiting groove of the tray, allowing the tray to be easily removed.

[0011] Preferably, it also includes multiple positioning pins, with positioning pins provided on the outer walls of multiple limiting blocks, and positioning holes provided on the inner walls of multiple trays' limiting grooves to match the multiple positioning pins; when the digestion vessel is inserted into the tray, the positioning pin is inserted into the positioning hole of the tray under the elastic force of the spring plate, thereby positioning the height of the digestion vessel and the tray and improving the placement accuracy of the multiple digestion vessels.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: When conducting testing, solid food samples are placed into multiple digestion vessels, which are then loaded onto a loading mechanism. The microwave generator inside the chamber is activated, and a geared motor drives a turntable to rotate. The turntable drives multiple rotating seats to rotate around the output shaft of the geared motor. Simultaneously, multiple external gear rings mesh with internal gear rings, causing the multiple rotating seats to rotate around their own axes. This results in multiple digestion vessels revolving around the output shaft of the geared motor while simultaneously rotating around their own axes, increasing the complexity of the running trajectory of the multiple digestion vessels. This makes the interaction between the solid food samples and microwaves in the multiple digestion vessels more uniform, thereby improving digestion efficiency. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model;

[0014] Figure 2 This is a front view structural diagram of the present invention;

[0015] Figure 3 It is a structural diagram of the turntable, geared motor, rotating seat, external gear ring 1, internal gear ring 1, digestion tank and tray, etc.

[0016] Figure 4 It is a structural diagram of the turntable, geared motor, track ring, gear one, gear two and internal gear ring two, etc.

[0017] Figure 5It is an exploded structural diagram of the turntable, geared motor, track ring, gear one, gear two and internal gear ring two, etc.

[0018] Figure 6 It is a structural diagram showing the disassembled state of the rotating seat, outer gear ring 1, inner gear ring 1, digestion tank and loading mechanism, etc.

[0019] Figure 7 It is a structural diagram of components such as trays, pivots, slides, ball joints, and inserts.

[0020] The following components are labeled in the attached diagram: 1. Box body; 2. Controller; 3. Turntable; 4. Gear motor; 5. Rotating seat; 6. External gear ring 1; 7. Internal gear ring 1; 8. Digestion vessel; 9. Tray; 10. Rotating shaft; 11. Slide rod; 12. Ball head rod; 13. Insert rod; 14. Track wheel; 15. Track ring; 16. Gear 1; 17. Gear 2; 18. Internal gear ring 2; 19. Spring plate; 20. Limit block; 21. Positioning pin. Detailed Implementation

[0021] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. This utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to make the disclosure of this utility model more thorough and complete. Example 1

[0022] like Figures 1 to 3 As shown, a microwave digestion device for heavy metals in solid food includes a housing 1 and a controller 2. The housing 1 has a digestion chamber inside, and a microwave generator is installed inside the digestion chamber. The controller 2 is installed on the housing 1. It also includes a turntable 3, a geared motor 4, multiple rotating seats 5, multiple external gear rings 6, internal gear rings 7, multiple digestion tanks 8, and multiple loading mechanisms. A horizontal partition is installed at the bottom of the digestion chamber of the housing 1. The turntable 3 is rotatably mounted on the horizontal partition. The geared motor 4 is installed below the horizontal partition. The output shaft of the geared motor 4 is connected to the center of the lower end face of the turntable 3. Multiple rotating seats 5 are rotatably mounted on the turntable 3. The multiple rotating seats 5 are evenly arranged around the center circumference of the turntable 3. External gear rings 6 are concentrically installed on the outer wall of each of the multiple rotating seats 5. Internal gear rings 7 are installed on the horizontal partition and mesh with multiple external gear rings 6. Loading mechanisms are installed in each of the multiple rotating seats 5. Multiple digestion tanks 8 are detachably installed on multiple loading mechanisms.

[0023] During testing, solid food samples are placed into multiple digestion vessels 8, which are then loaded onto a loading mechanism. The microwave generator inside the housing 1 is activated, and the geared motor 4 drives the turntable 3 to rotate. The turntable 3 drives multiple rotating seats 5 to rotate around the output shaft of the geared motor 4. Simultaneously, multiple external gear rings 6 mesh with internal gear rings 7, causing the multiple rotating seats 5 to rotate around their own axes. This results in the multiple digestion vessels 8 revolving around the output shaft of the geared motor 4 while rotating around their own axes, increasing the complexity of the running trajectory of the multiple digestion vessels 8. This makes the interaction between the solid food samples and the microwaves in the multiple digestion vessels 8 more uniform, thereby improving the digestion efficiency. Example 2

[0024] like Figures 3 to 7 As shown, based on Embodiment 1, the loading mechanism includes a tray 9, a rotating shaft 10, a sliding rod 11, and a ball joint rod 12. The tray 9 is located inside the rotating seat 5. The digestion vessel 8 is detachably inserted into the tray 9. The front and rear sides of the tray 9 rotate with the rotating seat 5 via the rotating shaft 10. The left and right sides of the tray 9 are slidably connected to the vertical sliding grooves on the inner wall of the rotating seat 5 via the sliding rod 11. The upper end of the ball joint rod 12 is connected to the end of the sliding rod 11 via a ball joint, and the lower end of the ball joint rod 12 is connected to the turntable 3 via a ball joint. The mechanism also includes multiple insert rods 13. Multiple horizontal sliding grooves are arranged radially on the turntable 3, and the multiple insert rods 13 are slidably inserted into the multiple horizontal sliding grooves. The lower ends of the multiple ball joint rods 12 are connected to the multiple insert rods 13 via ball joints. The mechanism also includes multiple tracks. The gear 14 and track ring 15 are included. The outer ends of multiple insert rods 13 extend out of the turntable 3. Track wheels 14 are rotatably mounted on the outer ends of multiple insert rods 13. Track ring 15 is located outside the turntable 3. Multiple track wheels 14 are tumblingly connected to track ring 15. Track ring 15 is eccentrically arranged with turntable 3. The gear 16, gear 17 and internal gear ring 18 are also included. Gear 16 is concentrically fixed on the output shaft of geared motor 4. Gear 17 is rotatably mounted on the horizontal partition of housing 1. Gear 17 meshes with gear 16. The upper end of internal gear ring 18 is connected to rotating seat 5 through eccentric bracket. Eccentric bracket is rotatably mounted on the output shaft of geared motor 4. Internal gear ring 18 meshes with gear 17. Internal gear ring 18 is concentric with gear 16.

[0025] Inserting the digestion vessel 8 into the tray 9 completes the sample placement. As the rotating seat 5 rotates, it drives the tray 9 and digestion vessel 8 to rotate via the rotating shaft 10 and the sliding rod 11. Because the end of the sliding rod 11 is restricted and pulled by the ball-end rod 12, the three-dimensional distance between the end of the sliding rod 11 and the lower end of the ball-end rod 12 remains constant. However, since the distance between the end of the sliding rod 11 and the lower end of the ball-end rod 12 in the horizontal direction is constantly changing, the vertical distance between the end of the sliding rod 11 and the lower end of the ball-end rod 12 is also constantly changing. The slide bar 11 slides up and down along the vertical groove of the rotating seat 5, thereby causing the tray 9 and the digestion vessel 8 to swing back and forth around the rotating shaft 10. When the turntable 3 rotates, the turntable 3 drives multiple insert rods 13 to rotate together, and multiple track wheels 14 roll along the track ring 15. Because the track ring 15 is eccentrically arranged with the turntable 3, the track wheels 14 drive the insert rods 13 to extend different distances out of the turntable 3 when the turntable 3 rotates at different angles. This automatically adjusts the position of multiple insert rods 13 in multiple horizontal grooves, thereby achieving automatic adjustment of the swing amplitude of the tray 9. The track ring 15 is rotatably mounted on the output shaft of the geared motor 4 via an eccentric bracket. While the geared motor 4 drives the turntable 3 to rotate via its output shaft, it also drives gear 16 to rotate. Gear 16 meshes with gear 17, which in turn meshes with internal gear ring 18, which in turn drives the track ring 15 to rotate. Because gear 16 meshes externally with gear 17 and gear 17 meshes internally with internal gear ring 18, the turntable 3 and the track ring 15 rotate in opposite directions, thus constantly adjusting the track ring 15. The angle between the center of the circle and the center of the turntable 3 causes the effect of the track ring 15 on the position adjustment of multiple track wheels 14 and multiple insert rods 13 to change constantly, thereby changing the horizontal distance between the lower end of multiple ball head rods 12 and the end of multiple slide rods 11, thereby adjusting the vertical sliding distance of multiple slide rods 11, and thus adjusting the amplitude of the tray 9 swinging back and forth around the rotating shaft 10, further increasing the complexity of the movement trajectory of the digestion vessel 8, making the solid food samples in multiple digestion vessels 8 more uniformly reacted with microwaves, and improving digestion efficiency. Example 3

[0026] like Figure 3 and Figure 6As shown, based on Embodiment 1, it also includes multiple spring plates 19 and multiple limiting blocks 20. Each of the multiple trays 9 has a vertical limiting groove inside, and the limiting groove has an opening on the end face of the tray 9. Each of the multiple digestion vessels 8 has a vertical groove on its outer wall. The multiple spring plates 19 are respectively located in the grooves of the multiple digestion vessels 8. The upper ends of the multiple spring plates 19 are connected to the outer walls of the multiple digestion vessels 8. Each of the multiple spring plates 19 has a limiting block 20 installed at its lower end. The multiple limiting blocks 20 are respectively matched with the limiting grooves of the multiple trays 9. It also includes multiple positioning pins 21. Each of the multiple limiting blocks 20 has a positioning pin 21 on its outer wall. Each of the multiple trays 9 has a positioning hole on its inner wall that matches the multiple positioning pins 21.

[0027] The elastic force of multiple spring plates 19 causes multiple limiting blocks 20 to extend out of the outer wall of multiple digestion containers 8. When the digestion container 8 is inserted into the tray 9, the limiting blocks 20 are inserted into the limiting groove of the tray 9, thereby limiting the relative angular position of the digestion container 8 and the tray 9. When the digestion container 8 is inserted into the tray 9, the positioning pin 21 is inserted into the positioning hole of the tray 9 under the elastic force of the spring plates 19, thereby positioning the height of the digestion container 8 and the tray 9, improving the placement accuracy of the multiple digestion containers 8. Pressing the spring plates 19 inward causes the limiting blocks 20 to be retracted into the groove of the digestion container 8 and disengaged from the limiting groove of the tray 9, making it easy to remove the tray 9.

[0028] like Figures 1 to 7 As shown, this utility model discloses a microwave digestion device for heavy metals in solid food. During operation, a solid food sample is first placed into multiple digestion vessels 8, which are then loaded onto multiple trays 9. Limiting blocks 20 and positioning pins 21 position the digestion vessels 8. Next, the microwave generator inside the housing 1 is activated, and the geared motor 4 drives the turntable 3 to rotate. The turntable 3 drives multiple rotating seats 5 to rotate around the output shaft of the geared motor 4. Simultaneously, multiple external gear rings 6 mesh with internal gear rings 7, thereby causing the multiple rotating seats 5 to rotate around the output shaft of the geared motor 4. The multiple digestion vessels 8 rotate around their own axes while revolving around the output shaft of the geared motor 4. Then, under the traction and limiting action of the ball joint rod 12, the tray 9 and the digestion vessels 8 swing back and forth around the rotating shaft 10. The multiple track wheels 14 are guided by the track ring 15, thereby automatically adjusting the position of the multiple insertion rods 13 and the amplitude of the back and forth swing of the multiple digestion vessels 8, making the running trajectory of the multiple digestion vessels 8 more complex. Finally, the solid food samples in the multiple digestion vessels 8 are more evenly affected by microwaves.

[0029] The main functions achieved by this utility model are:

[0030] 1. By making the operating trajectory of the digestion vessel more complex, the interaction between the solid food sample and the microwave is more uniform, thereby improving the digestion efficiency;

[0031] 2. By setting flexible positioning clips, the positioning accuracy and ease of loading and unloading of the digestion tank are improved.

[0032] The solid food heavy metal microwave digestion device of this utility model has common mechanical installation, connection or setting methods, and can be implemented as long as it can achieve its beneficial effect. The box body 1, controller 2, turntable 3, geared motor 4, external gear ring 6, internal gear ring 7, digestion tank 8, rotating shaft 10, ball head rod 12, track wheel 14, track ring 15, gear 16, gear 2 17, internal gear ring 2 18, spring plate 19, and positioning pin 21 of this utility model are purchased from the market. Technical personnel in this industry only need to install and operate it according to the accompanying instruction manual, without requiring any creative work from those skilled in the art.

[0033] All technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0034] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A microwave digestion device for heavy metals in solid food, comprising a housing (1) and a controller (2), wherein a digestion chamber is provided inside the housing (1), a microwave generator is provided inside the digestion chamber, and the controller (2) is mounted on the housing (1); characterized in that, It also includes a turntable (3), a geared motor (4), multiple rotating seats (5), multiple external gear rings (6), internal gear rings (7), multiple digestion tanks (8), and multiple loading mechanisms. A horizontal partition is installed at the bottom of the digestion chamber of the box (1). The turntable (3) is rotatably mounted on the horizontal partition. The geared motor (4) is installed below the horizontal partition. The output shaft of the geared motor (4) is connected to the center of the lower end face of the turntable (3). Multiple rotating seats (5) are rotatably mounted on the turntable (3). Multiple rotating seats (5) are evenly arranged around the center circumference of the turntable (3). External gear rings (6) are concentrically mounted on the outer wall of multiple rotating seats (5). Internal gear rings (7) are mounted on the horizontal partition. Internal gear rings (7) mesh with multiple external gear rings (6). Loading mechanisms are installed in multiple rotating seats (5). Multiple digestion tanks (8) are detachably mounted on multiple loading mechanisms.

2. The microwave digestion device for heavy metals in solid food as described in claim 1, characterized in that, The loading mechanism includes a tray (9), a rotating shaft (10), a sliding rod (11), and a ball joint (12). The tray (9) is located inside the rotating seat (5). The digestion vessel (8) is detachably inserted into the tray (9). The front and rear sides of the tray (9) rotate with the rotating seat (5) through the rotating shaft (10). The left and right sides of the tray (9) are slidably connected to the vertical sliding groove on the inner wall of the rotating seat (5) through the sliding rod (11). The upper end of the ball joint (12) is connected to the end of the sliding rod (11) through a ball joint. The lower end of the ball joint (12) is connected to the turntable (3) through a ball joint.

3. The microwave digestion device for heavy metals in solid food as described in claim 2, characterized in that, It also includes multiple insert rods (13), multiple horizontal grooves are arranged radially on the turntable (3), multiple insert rods (13) are slidably inserted into the multiple horizontal grooves respectively, and the lower ends of multiple ball head rods (12) are connected to the multiple insert rods (13) through ball joints respectively.

4. The microwave digestion device for heavy metals in solid food as described in claim 3, characterized in that, It also includes multiple track wheels (14) and track rings (15). The outer ends of multiple insert rods (13) extend out of the outside of the turntable (3). Track wheels (14) are rotatably installed on the outer ends of multiple insert rods (13). The track rings (15) are located on the outside of the turntable (3). Multiple track wheels (14) and track rings (15) are connected in a rolling manner. The track rings (15) and the turntable (3) are eccentrically arranged.

5. The microwave digestion device for heavy metals in solid food as described in claim 4, characterized in that, It also includes gear one (16), gear two (17) and internal gear ring two (18). Gear one (16) is concentrically fixed on the output shaft of the geared motor (4). Gear two (17) is rotatably mounted on the horizontal partition of the housing (1). Gear two (17) meshes with gear one (16). The upper end of internal gear ring two (18) is connected to the rotating seat (5) through an eccentric bracket. The eccentric bracket is rotatably mounted on the output shaft of the geared motor (4). Internal gear ring two (18) meshes with gear two (17). Internal gear ring two (18) is concentric with gear one (16).

6. The microwave digestion device for heavy metals in solid food as described in claim 2, characterized in that, It also includes multiple spring plates (19) and multiple limiting blocks (20). Each of the multiple trays (9) has a vertical limiting groove inside. The limiting groove has an opening on the end face of the tray (9). Each of the multiple digestion vessels (8) has a vertical groove on its outer wall. The multiple spring plates (19) are located in the grooves of the multiple digestion vessels (8). The upper end of the multiple spring plates (19) is connected to the outer wall of the multiple digestion vessels (8). The lower end of the multiple spring plates (19) is equipped with a limiting block (20). The multiple limiting blocks (20) are matched with the limiting grooves of the multiple trays (9).

7. The microwave digestion device for heavy metals in solid food as described in claim 6, characterized in that, It also includes multiple positioning pins (21), positioning pins (21) are provided on the outer side walls of multiple limit blocks (20), and positioning holes matching multiple positioning pins (21) are provided on the inner walls of the limit grooves of multiple trays (9).

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