Soil heavy metal detection device

Abstract

The utility model discloses a soil heavy metal detection device, and relates to the technical field of soil heavy metal detection. A vibrating sieve plate, two upper guide plates fixedly arranged on the opposite inner walls of the detection box, two crushing rollers rotationally arranged along the horizontal line, a lower guide plate fixedly arranged on the inner walls of the detection box and a drawing collection box are sequentially arranged in the detection box from top to bottom, and a plurality of through sieve holes are uniformly distributed in the top of the sieve plate; the opposite ends of the two upper material guiding plates extend downwards to the positions above the two smashing rollers correspondingly, the two smashing rollers are meshed, the top of the collecting box is provided with an opening, one end of the collecting box penetrates through the detecting box and extends to the outside, and one end of the lower material guiding plate extends downwards to the position above the collecting box. According to the device, impurities in a soil sample can be screened out, soil blocks in the soil sample can be fully scattered, the soil sample attached to the outer wall of the probe can be cleaned, and the detection accuracy of the content of heavy metal in soil is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of soil heavy metal detection, in particular to a soil heavy metal detection device. Background Art

[0002] Soil is not only a component of the natural environment, but also the most important natural resource for agricultural production. With the rapid development of urbanization and industrialization, heavy metal elements enter the soil through sewage irrigation, atmospheric dust deposition and other pathways. These heavy metal elements are not degraded by microorganisms and are easily enriched, causing heavy metal pollution in the soil. In addition, heavy metal elements in the soil can enter the food chain through plant absorption and animal enrichment, posing a huge hidden danger to the quality and safety of agricultural products and endangering public health. Therefore, it is necessary to test the soil for heavy metals in order to know the content of heavy metals in the soil.

[0003] The existing soil heavy metal detection devices have gradually exposed their shortcomings during use, mainly in the following aspects:

[0004] First, when testing the heavy metal content in the soil, sampling is generally performed through a soil sampling device, and then the soil sample is placed in a testing device for testing. The soil contains impurities such as stones and agglomerated soil clods. These impurities and soil clods not only affect the accuracy of the detection of the heavy metal content in the soil, but also the detection probe will be damaged by collision with stones, resulting in damage to the equipment.

[0005] Second, when the existing detection device continuously detects multiple soil samples, the soil samples from the previous detection process are easily attached to the outer wall of the probe, and there is a problem of cross-contamination of soil samples when testing new soil samples, resulting in inaccurate detection results of the heavy metal content in the soil by the device.

[0006] In summary, the prior art obviously has inconveniences and defects in practical use, so it is necessary to improve it. Utility Model Content

[0007] In view of the defects in the prior art, the technical problem to be solved by the utility model is to provide a soil heavy metal detection device, which can screen out impurities in soil samples and fully break up the soil blocks therein, which not only improves the accuracy of heavy metal content detection in the soil, but also effectively prevents the probe from being damaged by stones;

[0008] The device can quickly clean the soil samples attached to the outer wall of the probe, prevent cross contamination of the soil samples, and improve the accuracy of the detection results of the heavy metal content in the soil.

[0009] In order to solve the above problems, the utility model provides the following technical solutions:

[0010] A soil heavy metal detection device comprises a detection box, wherein the interior of the detection box is provided with a vibrating sieve plate, two upper guide plates fixedly arranged on opposite inner walls of the detection box, two crushing rollers arranged to rotate along a horizontal line, a lower guide plate fixedly arranged on the inner wall of the detection box and a collection box arranged to be pulled out in sequence from top to bottom, the top of the sieve plate is evenly distributed with a plurality of penetrating sieve holes, the facing ends of the two upper guide plates respectively extend downward to the top of the two crushing rollers, the two crushing rollers are meshed, the top of the collection box is open, one end of the collection box passes through the detection box and extends to the outside, and one end of the lower guide plate extends downward to the top of the collection box,

[0011] A sliding block is provided in the detection box at a position above the collection box for horizontal sliding movement, a lifting plate is provided at the bottom of the sliding block for vertical lifting movement, a probe is fixed at the bottom of the lifting plate, a display module and a delivery tube are fixed at the top of the detection box, and the lower end of the delivery tube passes through the detection box and extends to the inside.

[0012] The inner bottom of the detection box is provided with a cleaning component and an air-drying component, and the collection box, the cleaning component and the air-drying component are arranged in parallel along the sliding direction of the sliding block.

[0013] As an optimized solution, the cleaning component includes an external fixed water pipe fixed vertically, both ends of the external fixed water pipe are sealed, an internal fixed water pipe is coaxially arranged inside the external fixed water pipe, both ends of the internal fixed water pipe respectively pass through the top and bottom ends of the external fixed water pipe and extend to the outside, and a plurality of water spray holes are evenly distributed on the outer wall of the internal fixed water pipe located inside the external fixed water pipe.

[0014] A water inlet pipe connected to the inner cavity of the external fixed water pipe is fixedly provided on the outer wall of the external fixed water pipe, a water tank is fixedly provided on the outer wall of the detection box, one end of the water inlet pipe extends through the detection box to the outside and is connected to the inner cavity of the water tank, and the lower end of the internal fixed water pipe extends through the detection box to the outside.

[0015] As an optimized solution, the air-drying component includes an external fixed air pipe that is vertically fixed, the two ends of the external fixed air pipe are sealed, an internal fixed air pipe is coaxially arranged inside the external fixed air pipe, the two ends of the internal fixed air pipe respectively pass through the top and bottom ends of the external fixed air pipe and extend to the outside, and a plurality of exhaust holes are evenly distributed on the outer wall of the internal fixed air pipe located inside the external fixed air pipe.

[0016] A ventilation pipe connected to the inner cavity of the external fixed air pipe is fixedly provided on the outer wall of the external fixed air pipe, a fan is fixedly provided on the outer wall of the detection box, one end of the ventilation pipe extends through the detection box to the outside and is connected to the air outlet of the fan, and the lower end of the internal fixed air pipe extends through the detection box to the outside.

[0017] As an optimized solution, two rotating shafts rotating along a horizontal line are provided inside the detection box above the sieve plate, and a plurality of breaking rods are evenly distributed on the outer wall of the rotating shaft along the circumference thereof.

[0018] As an optimized solution, a waste discharge trough connected to the inner cavity of the detection box is provided on the outer wall of the detection box, the sieve plate is swingably arranged along a horizontal line, and the swinging end of the sieve plate extends through the waste discharge trough to the outside of the detection box.

[0019] As an optimized solution, a fixed plate is fixedly provided on the outer wall of the detection box below the waste discharge chute, a waste box is placed on the top of the fixed plate, and the swing end of the sieve plate extends to the top of the waste box.

[0020] As an optimized solution, a transparent window is fixedly provided on the outer wall of the detection box, through which the position of the probe can be checked.

[0021] As an optimized solution, a water pump is fixedly provided inside the water tank, and the water outlet of the water pump is connected to the water inlet pipe.

[0022] As an optimized solution, a fixed shaft is provided inside the detection box at a position below the sieve plate on one side, and the two ends of the fixed shaft are fixedly connected to the opposite inner walls of the detection box, and the sieve plate is hinged to the fixed shaft.

[0023] The opposite inner walls of the detection box are provided with horizontally sliding moving blocks, and the facing ends of the two moving blocks are hinged with swing plates, and one end of the two swing plates extends upward and is hinged with the screen plate.

[0024] As an optimized solution, the detection box is fixed with a support plate at a position above the collection box, the sliding block is slidably connected to the bottom of the support plate, and a single-thread screw is provided below the support plate to rotate along a horizontal line, one end of the single-thread screw passes through the sliding block and is threadedly connected to the sliding block.

[0025] Compared with the prior art, the beneficial effects of the utility model are:

[0026] 1. During the rotation of the rotating shaft, the breaking rod can break up the soil blocks on the top of the sieve plate. During the vibration of the vibration motor, the impurities in the soil on the top of the sieve plate can be screened. During the rotation of the two crushing rollers, the screened soil can be crushed into fine particles. The collection box collects the crushed soil particles. The probe is inserted into the soil in the collection box and the soil is tested. The test results are presented on the display module, which realizes the function of breaking up the soil blocks in the soil sample and screening out the impurities therein, which not only improves the accuracy of the detection of heavy metal content in the soil, but also effectively prevents the probe from being damaged by stones.

[0027] 2. The cleaning component can be used to rinse the soil attached to the outer wall of the probe, and the air-drying component can be used to quickly air-dry the cleaned probe, thereby realizing the function of quickly cleaning the soil sample attached to the outer wall of the probe, preventing cross-contamination of soil samples, and improving the accuracy of the detection results of heavy metal content in the soil;

[0028] 3. The two upper electric telescopic cylinders are extended, which in turn drives the two moving blocks to slide horizontally. With the cooperation of the two swing plates, the swing end of the screen plate tilts downward, and the impurities on the top of the screen plate are discharged into the waste box through the waste discharge trough for collection, thus realizing the function of quickly cleaning the impurities on the top of the screen plate and further improving the practicality of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the specific implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the specific implementation or the prior art description. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, each element or part is not necessarily drawn according to the actual scale.

[0030] Figure 1 It is a schematic diagram of the structure of the utility model;

[0031] Figure 2 It is a structural schematic diagram of the cleaning component of the utility model;

[0032] Figure 3 It is a structural schematic diagram of the water tank of the utility model;

[0033] Figure 4 It is a structural schematic diagram of the utility model when the screen plate is tilted downward.

[0034] In the figure: 1-detection box; 2-display module; 3-dispensing tube; 4-transmission belt; 5-driving wheel; 6-driven wheel; 7-control motor; 8-swing plate; 9-waste trough; 10-waste box; 11-fixed plate; 12-moving block; 13-crushing roller; 14-lower guide plate; 15-side baffle; 16-collection box; 17-probe; 18-cleaning component; 19-air drying component; 20-lifting plate; 21-sliding block; 22-upper guide plate; 23-vibration motor; 24-fixed shaft; 25-sieve hole; 26- Sieve plate; 27-breaking rod; 28-rotating axis; 29-external fixed water pipe; 30-internal fixed water pipe; 31-water spray hole; 32-water inlet pipe; 33-exhaust hole; 34-ventilation pipe; 35-internal fixed air pipe; 36-external fixed air pipe; 37-transparent window; 38-fan; 39-water pump; 40-water tank; 41-first drive motor; 42-driven gear; 43-second drive motor; 44-drive gear; 45-support plate; 46-single threaded rod; 47-lower electric telescopic cylinder; 48-upper electric telescopic cylinder. DETAILED DESCRIPTION

[0035] The following embodiments of the technical solution of the utility model are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the utility model, and are therefore only used as examples, and cannot be used to limit the protection scope of the utility model.

[0036] like Figures 1 to 4 As shown, a soil heavy metal detection device includes a detection box 1, wherein the detection box 1 is provided with a vibrating sieve plate 26, two upper guide plates 22 fixedly arranged on opposite inner walls of the detection box 1, two crushing rollers 13 rotatably arranged along a horizontal line, a lower guide plate 14 fixedly arranged on the inner wall of the detection box 1, and a collection box 16 that is pulled out, the top of the sieve plate 26 is evenly distributed with a plurality of sieve holes 25 that penetrate through, the ends of the two upper guide plates 22 that face each other extend downward to the top of the two crushing rollers 13 respectively, the two crushing rollers 13 are meshed with each other, the top of the collection box 16 is open, one end of the collection box 16 passes through the detection box 1 and extends to the outside, and one end of the lower guide plate 14 extends downward to the top of the collection box 16,

[0037] A sliding block 21 is provided in the detection box 1 at a position above the collection box 16 for horizontal sliding movement. A lifting plate 20 is provided at the bottom of the sliding block 21 for vertical lifting movement. A probe 17 is fixedly provided at the bottom of the lifting plate 20. A display module 2 and a delivery tube 3 are fixedly provided at the top of the detection box 1. The lower end of the delivery tube 3 passes through the detection box 1 and extends to the inside.

[0038] The inner bottom of the detection box 1 is provided with a cleaning component 18 and an air drying component 19, and the collection box 16, the cleaning component 18 and the air drying component 19 are arranged in parallel along the sliding direction of the sliding block 21;

[0039] During the vibration of the sieve plate 26, impurities and lumps of soil in the soil can be screened; during the rotation of the two crushing rollers 13, the screened soil can be crushed into fine particles; the collecting box 16 collects the crushed soil particles; the probe 17 is inserted into the soil in the collecting box 16 to detect the soil, and the detection results are presented on the display module 2; the cleaning component 18 and the air-drying component 19 can clean and air-dry the probe 17 respectively.

[0040] The cleaning assembly 18 includes an external fixed water pipe 29 which is fixed vertically. Both ends of the external fixed water pipe 29 are sealed. An internal fixed water pipe 30 is coaxially arranged inside the external fixed water pipe 29. Both ends of the internal fixed water pipe 30 extend to the outside through the top and bottom ends of the external fixed water pipe 29, respectively. A plurality of water spray holes 31 are evenly distributed on the outer wall of the internal fixed water pipe 30 which is located inside the external fixed water pipe 29.

[0041] A water inlet pipe 32 connected to the inner cavity of the external fixed water pipe 29 is fixedly provided on the outer wall thereof, a water tank 40 is fixedly provided on the outer wall of the detection box 1, one end of the water inlet pipe 32 passes through the detection box 1 to extend to the outside and is connected to the inner cavity of the water tank 40, and the lower end of the internal fixed water pipe 30 passes through the detection box 1 to extend to the outside;

[0042] When the probe 17 moves to the inner area of ​​the internal fixed water pipe 30 , the water in the water tank 40 is sprayed toward the probe 17 through the water spray hole 31 , and the soil on the outer wall of the probe 17 is washed. The washed sewage is discharged to the outside of the detection box 1 through the internal fixed water pipe 30 .

[0043] The air-drying assembly 19 includes an external fixed air pipe 36 which is fixed vertically. Both ends of the external fixed air pipe 36 are sealed. An internal fixed air pipe 35 is coaxially arranged inside the external fixed air pipe 36. Both ends of the internal fixed air pipe 35 extend to the outside through the top and bottom ends of the external fixed air pipe 36, respectively. A plurality of exhaust holes 33 are evenly distributed on the outer wall of the internal fixed air pipe 35 which is located inside the external fixed air pipe 36.

[0044] A vent pipe 34 connected to the inner cavity of the external fixed air pipe 36 is fixedly provided on the outer wall thereof, a fan 38 is fixedly provided on the outer wall of the detection box 1, one end of the vent pipe 34 extends to the outside through the detection box 1 and is connected to the air outlet of the fan 38, and a lower end of the internal fixed air pipe 35 extends to the outside through the detection box 1;

[0045] When the probe 17 moves to the inner area of ​​the internal fixed air pipe 35 , the gas at the air outlet of the fan 38 is blown toward the probe 17 through the exhaust hole 33 to dry the probe 17 .

[0046] Two rotating shafts 28 are arranged to rotate along a horizontal line in the detection box 1 above the sieve plate 26, and a plurality of breaking rods 27 are evenly distributed on the outer wall of the rotating shaft 28 along the circumference thereof;

[0047] The breaking rod 27 can break up the soil blocks on the top of the screen plate 26 during the rotation process.

[0048] A waste discharge slot 9 communicating with the inner cavity of the detection box 1 is provided on the outer wall thereof, and the sieve plate 26 is swingably arranged along a horizontal line, and the swinging end of the sieve plate 26 passes through the waste discharge slot 9 and extends to the outside of the detection box 1;

[0049] When the swinging end of the sieve plate 26 abuts against the top surface of the waste discharge chute 9, the sieve plate 26 can screen the soil on its surface. When the swinging end of the sieve plate 26 abuts against the bottom surface of the waste discharge chute 9, the swinging end of the sieve plate 26 tilts downward, and impurities on the surface of the sieve plate 26 are discharged to the outside of the detection box 1 through the waste discharge chute 9.

[0050] A fixed plate 11 is fixedly provided on the outer wall of the detection box 1 below the waste discharge chute 9 , a waste box 10 is placed on the top of the fixed plate 11 , and the swing end of the sieve plate 26 extends to the top of the waste box 10 .

[0051] A transparent window 37 is fixedly provided on the outer wall of the detection box 1 , through which the position of the probe 17 can be checked.

[0052] A water pump 39 is fixedly disposed inside the water tank 40 , and a water outlet of the water pump 39 is connected to the water inlet pipe 32 .

[0053] A fixed shaft 24 is provided inside the detection box 1 at a position below the sieve plate 26. The two ends of the fixed shaft 24 are fixedly connected to the opposite inner walls of the detection box 1. The sieve plate 26 is hinged to the fixed shaft 24.

[0054] The opposite inner walls of the detection box 1 are provided with horizontally slidable moving blocks 12 , and the facing ends of the two moving blocks 12 are hinged with swing plates 8 , and one end of the two swing plates 8 extends upward and is hinged to the screen plate 26 .

[0055] Two upper electric telescopic cylinders 48 are fixedly provided on the inner wall of the detection box 1 , and the telescopic ends of the two upper electric telescopic cylinders 48 are fixedly connected to the two moving blocks 12 accordingly.

[0056] A vibration motor 23 is fixedly provided at the bottom of the sieve plate 26 .

[0057] A support plate 45 is fixedly provided on the detection box 1 above the collection box 16, and a sliding block 21 is slidably connected to the bottom of the support plate 45. A single-thread screw 46 is provided below the support plate 45 and rotates along a horizontal line. One end of the single-thread screw 46 passes through the sliding block 21 and is threadedly connected to the sliding block 21.

[0058] The relative side walls of the support plate 45 are fixedly connected to the relative inner walls of the detection box 1, and the two ends of the single-thread screw 46 are rotatably connected to the relative inner walls of the detection box 1. The end of the detection box 1 is fixedly provided with a first drive motor 41, and the output end of the first drive motor 41 passes through the detection box 1 and is fixedly connected to the single-thread screw 46.

[0059] A lower electric telescopic cylinder 47 is fixedly provided at the bottom of the sliding block 21 , and a telescopic end of the lower electric telescopic cylinder 47 is fixedly connected to the lifting plate 20 .

[0060] The end of the detection box 1 is provided with a driving gear 44 and a driven gear 42 which rotate along a horizontal line. The driving gear 44 meshes with the driven gear 42 . The driving gear 44 and the driven gear 42 are connected to the two crushing rollers 13 correspondingly.

[0061] A second driving motor 43 is fixedly provided at the end of the detection box 1 , and an output end of the second driving motor 43 is fixedly connected to a driving gear 44 .

[0062] Both ends of the two rotating shafts 28 are rotatably connected to the relative inner walls of the detection box 1. One end of the two rotating shafts 28 extends through the detection box 1 to the outside and is respectively fixed with a driving wheel 5 and a driven wheel 6. The driving wheel 5 is connected to the driven wheel 6 through a transmission belt 4.

[0063] A control motor 7 is fixedly provided on the outer wall of the detection box 1 , and an output end of the control motor 7 is fixedly connected to the driving wheel 5 .

[0064] A side baffle 15 is fixedly connected to the top of the lower guide plate 14 , and the side baffle 15 can prevent soil from falling to the bottom of the detection box 1 .

[0065] The working principle of this device is:

[0066] A soil sample is added to the detection box 1 through the delivery tube 3, and the control motor 7 drives the driving wheel 5, the transmission belt 4, the driven wheel 6 and the two rotating shafts 28 to rotate, thereby driving the breaking rod 27 to rotate, and the breaking rod 27 breaks up the soil blocks on the top of the sieve plate 26. The vibration motor 23 drives the sieve plate 26 to vibrate, thereby sieving the soil on the top of the sieve plate 26, and impurities such as stones are trapped on the surface of the sieve plate 26. The sieved soil falls through the sieve hole 25 to the two upper guide plates 22, and the soil on the two upper guide plates 22 slides downward and falls between the two crushing rollers 13. The second driving motor 43 drives the driving gear 44 and the driven gear 42 to rotate, thereby driving the two crushing rollers 13 to rotate. The two crushing rollers 13 can crush the soil into fine particles during the rotation process. The soil particles enter the collection box 16 through the lower guide plate 14. The first drive motor 41 drives the single-thread screw 46 to rotate, and then drives the sliding block 21 to slide horizontally until the probe 17 is located above the collection box 16. The lower electric telescopic cylinder 47 extends and drives the lifting plate 20 and the probe 17 to descend until the probe 17 is inserted into the soil, and the soil is tested. The test results are displayed on the display module 2, which realizes the function of breaking up the soil blocks in the soil sample and screening out the impurities therein, which not only improves the accuracy of the detection of heavy metal content in the soil, but also effectively prevents the probe 17 from being damaged by stones;

[0067] When different soil samples are tested continuously, after the previous soil sample is tested, the collection box 16 is pulled out and replaced with a new collection box 16, and the above operation on the soil is repeated. The next soil sample particles enter the new collection box 16. While the soil sample is being processed, the probe 17 is inserted into the inner fixed water pipe 30 through the first drive motor 41 and the lower electric telescopic cylinder 47, and the water pump 39 draws the water in the water tank 40 into the outer fixed water pipe 29, and then sprays it to the probe 17 through the spray hole 31, so that the soil on the outer wall of the probe 17 is processed. After cleaning, the probe 17 is inserted into the inner fixed air pipe 35 again by the first drive motor 41 and the lower electric telescopic cylinder 47, and the fan 38 continuously delivers gas to the outer fixed air pipe 36. The gas is sprayed toward the probe 17 through the exhaust hole 33 and the probe 17 is air-dried. After air-drying, the probe 17 detects the soil in the new collection box 16, realizing the function of quickly cleaning the soil sample attached to the outer wall of the probe 17, preventing the cross contamination of the soil sample, and improving the accuracy of the heavy metal content detection result in the soil;

[0068] When cleaning the impurities on the top of the sieve plate 26, the two upper electric telescopic cylinders 48 are extended, thereby driving the two moving blocks 12 to slide horizontally. With the cooperation of the two swing plates 8, the swing end of the sieve plate 26 tilts downward, and the impurities on the top of the sieve plate 26 are discharged into the waste box 10 through the waste discharge trough 9 for collection, thereby realizing the function of quickly cleaning the impurities on the top of the sieve plate 26 and further improving the practicability of the device.

[0069] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model, and they should all be included in the scope of the claims and specification of the utility model.

Claims

1. A soil heavy metal detection device, characterized in that: The invention comprises a detection box (1), wherein the interior of the detection box (1) is provided with a vibrating sieve plate (26), two upper guide plates (22) fixedly arranged on opposite inner walls of the detection box (1), two crushing rollers (13) arranged to rotate along a horizontal line, a lower guide plate (14) fixedly arranged on the inner wall of the detection box (1), and a collection box (16) arranged to be pulled out, wherein the top of the sieve plate (26) is evenly distributed with a plurality of sieve holes (25) arranged to penetrate through, the ends of the two upper guide plates (22) facing each other respectively extend downward to the top of the two crushing rollers (13), the two crushing rollers (13) are meshed with each other, the top of the collection box (16) is open, one end of the collection box (16) passes through the detection box (1) and extends to the outside, and one end of the lower guide plate (14) extends downward to the top of the collection box (16), A sliding block (21) is provided in the detection box (1) at a position above the collection box (16) so as to slide horizontally, a lifting plate (20) is provided at the bottom of the sliding block (21) and is lifted vertically, a probe (17) is fixedly provided at the bottom of the lifting plate (20), a display module (2) and a delivery tube (3) are fixedly provided at the top of the detection box (1), and a lower end of the delivery tube (3) passes through the detection box (1) and extends to the inside, The inner bottom of the detection box (1) is provided with a cleaning component (18) and an air drying component (19), and the collection box (16), the cleaning component (18) and the air drying component (19) are arranged in parallel along the sliding direction of the sliding block (21).

2. A soil heavy metal detection device according to claim 1, characterized in that: The cleaning assembly (18) comprises an external fixed water pipe (29) which is vertically fixed, both ends of the external fixed water pipe (29) are sealed, an internal fixed water pipe (30) is coaxially arranged inside the external fixed water pipe (29), both ends of the internal fixed water pipe (30) respectively pass through the top end and the bottom end of the external fixed water pipe (29) and extend to the outside, and a plurality of water spray holes (31) are evenly distributed on the outer wall of the internal fixed water pipe (30) located inside the external fixed water pipe (29), A water inlet pipe (32) connected to the inner cavity of the external fixed water pipe (29) is fixedly provided on the outer wall of the external fixed water pipe (29); a water tank (40) is fixedly provided on the outer wall of the detection box (1); one end of the water inlet pipe (32) passes through the detection box (1) to extend to the outside and is connected to the inner cavity of the water tank (40); and a lower end of the internal fixed water pipe (30) passes through the detection box (1) to extend to the outside.

3. A soil heavy metal detection device according to claim 2, characterized in that: The air-drying component (19) comprises an external fixed air pipe (36) which is fixed vertically, and both ends of the external fixed air pipe (36) are sealed. An internal fixed air pipe (35) is coaxially arranged inside the external fixed air pipe (36), and both ends of the internal fixed air pipe (35) respectively pass through the top end and the bottom end of the external fixed air pipe (36) and extend to the outside. The external wall of the internal fixed air pipe (35) located inside the external fixed air pipe (36) is evenly distributed with a plurality of exhaust holes (33) which are arranged through the internal fixed air pipe. A ventilation pipe (34) connected to the inner cavity of the external fixed air pipe (36) is fixedly provided on the outer wall thereof, a fan (38) is fixedly provided on the outer wall of the detection box (1), one end of the ventilation pipe (34) passes through the detection box (1) to extend to the outside and is connected to the air outlet of the fan (38), and a lower end of the internal fixed air pipe (35) passes through the detection box (1) to extend to the outside.

4. A soil heavy metal detection device according to claim 3, characterized in that: Two rotating shafts (28) are arranged to rotate along a horizontal line at a position above the sieve plate (26) inside the detection box (1), and a plurality of breaking rods (27) are evenly distributed on the outer wall of the rotating shaft (28) along its circumference.

5. A soil heavy metal detection device according to claim 4, characterized in that: The outer wall of the detection box (1) is provided with a waste discharge groove (9) which is connected to the inner cavity thereof, and the sieve plate (26) is arranged to swing along a horizontal line, and the swinging end of the sieve plate (26) passes through the waste discharge groove (9) and extends to the outside of the detection box (1).

6. A soil heavy metal detection device according to claim 5, characterized in that: A fixed plate (11) is fixedly provided on the outer wall of the detection box (1) below the waste discharge trough (9), a waste box (10) is placed on the top of the fixed plate (11), and the swing end of the sieve plate (26) extends to the top of the waste box (10).

7. A soil heavy metal detection device according to claim 6, characterized in that: A transparent window (37) is fixedly provided on the outer wall of the detection box (1), and the position of the probe (17) can be viewed through the transparent window (37).

8. A soil heavy metal detection device according to claim 7, characterized in that: A water pump (39) is fixedly disposed inside the water tank (40), and a water outlet of the water pump (39) is connected to the water inlet pipe (32).

9. A soil heavy metal detection device according to claim 8, characterized in that: A fixed shaft (24) is provided inside the detection box (1) at a position below the sieve plate (26) on one side, and two ends of the fixed shaft (24) are fixedly connected to the opposite inner walls of the detection box (1), and the sieve plate (26) is hinged to the fixed shaft (24). The opposite inner walls of the detection box (1) are provided with moving blocks (12) arranged to slide horizontally, and the facing ends of the two moving blocks (12) are hinged with swing plates (8), and one end of the two swing plates (8) extends upward and is hinged to the screen plate (26).

10. A soil heavy metal detection device according to claim 9, characterized in that: The detection box (1) is fixedly provided with a support plate (45) at a position above the collection box (16); the sliding block (21) is slidably connected to the bottom of the support plate (45); a single-thread screw (46) is provided below the support plate (45) and rotates along a horizontal line; one end of the single-thread screw (46) passes through the sliding block (21) and is threadedly connected to the sliding block (21).

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