Soil heavy metal pollution detection device and detection method

Abstract

The invention relates to the technical field of soil detection, in particular to a soil heavy metal pollution detection device and method.The soil heavy metal pollution detection device comprises a soil sampling ring, the bottom end of the soil sampling ring is provided with an inclined cutting edge, the soil sampling device further comprises a plurality of detection holes, the multiple detection holes are perpendicularly formed in the surface of the soil sampling ring, and the distances between every two adjacent detection holes are the same; the bottom ring sleeves the surface of the soil sampling ring and is positioned at the bottom of the soil sampling ring; the top ring is arranged above the soil sampling ring, and a plurality of polished rods are fixedly connected between the top ring and the bottom ring; the circular plate is fixedly connected to the top of the soil sampling ring, and a plurality of sliding strips are fixedly connected to the circular plate; the detection probes are driven to sequentially enter the corresponding detection holes for heavy metal detection in the ascending process of the soil sampling ring, and the detection probes are cleaned in the detection process, so that detection errors caused by adhesion of soil bodies with different depths are reduced, and the accuracy of layered detection data is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of soil detection, and in particular to a soil heavy metal pollution detection device and detection method. Background Art

[0002] The patent document with announcement number CN114062655B announces a soil heavy metal pollution detection device, including a pair of outer shells, a pair of main support parts, a drilling main part, a pair of secondary support main parts, a detection part, a pair of soil heavy metal detectors, a soil removal main part and a propulsion part; the pair of outer shells are detachably connected, and a storage cavity is formed between the pair of outer shells.

[0003] In the existing technology, the heavy metal content in the soil is detected by moving the metal detection equipment deep into the soil. During the soil heavy metal detection process, it is necessary to perform layered detection on the soil at different depths and compare the detection data to analyze the relationship between the heavy metal content and the soil depth. When the metal detection equipment moves deeply into the soil for detection, the detection end of the metal detection equipment causes a large amount of disturbance to the soil, thereby causing the mixing of soil at different depths. Moreover, when the detection end moves downward from the soil surface, the surface of the detection end will adhere to the soil at different depths, making it difficult to distinguish, thereby reducing the accuracy of the layered detection data. Summary of the Invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a soil heavy metal pollution detection device and detection method.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a soil heavy metal pollution detection device, comprising a soil sampling ring, the bottom end of which is provided with an inclined cutting edge, and further comprising: Multiple detection holes are vertically opened on the surface of the soil ring, and the distance between two adjacent detection holes is the same; A bottom ring is sleeved on the surface of the soil borrowing ring and is located at the bottom of the soil borrowing ring; A top ring is arranged above the soil collecting ring, and a plurality of polished rods are fixedly connected between the top ring and the bottom ring; A circular plate is fixedly connected to the top of the soil ring, a plurality of sliding bars are fixedly connected to the circular plate, each sliding bar is slidably inserted on the corresponding polished rod, and a lifting assembly is provided on the circular plate; The mounting frame is fixedly connected to the bottom ring, and a detection component is fixedly installed inside the mounting frame. The detection component includes a detector and a detection probe. A conductive line is connected between the detector and the detection probe, and the detection probe is arranged opposite to the detection hole; An annular shell is fixedly connected to the mounting frame, the end of the detection probe is sleeved inside the annular shell, and a plurality of nozzles are fixedly connected to the inner wall of the annular shell along the circumferential direction; A water supply assembly is provided on the annular housing and is used to supply water to the interior of the annular housing; The driving assembly is arranged on the detection probe and is used to drive the detection probe to move back and forth laterally.

[0006] Preferably, the drive assembly comprises: The movable plate is fixedly connected to the detection probe, and a plurality of limit pins are fixedly connected to the movable plate, and the limit pins are slidably connected to the installation frame; The first electric cylinder is fixedly mounted inside the mounting frame, and a transmission shaft of the first electric cylinder is fixedly connected to the movable plate.

[0007] Preferably, the water supply assembly includes: A water storage tank is fixedly connected to the top of the mounting frame; The water pump is fixedly installed on the water tank, the water inlet end of the water pump is fixedly connected to the water tank, the water outlet end of the water pump is fixedly connected to a connecting pipe, and one end of the connecting pipe is fixedly connected to the annular shell.

[0008] Preferably, a laser receiver is fixedly mounted on the water pump, a sliding block is slidably connected to the mounting frame, a laser emitter is fixedly mounted on the top of the sliding block, the laser emitter is located directly below the laser receiver, a magnetic pin is fixedly connected to the bottom of the sliding block, a guide plate is fixedly connected to the top of the movable plate, a circular groove is provided on the top of the guide plate, permanent magnets are fixedly mounted at the four corners of the circular groove, the permanent magnets directly below and at the diagonal corners of the magnetic pin are positive, the other two permanent magnets are negative, and the magnetic pin is negative.

[0009] Preferably, an insertion rod is slidably inserted on the bottom ring, a second electric cylinder is fixedly installed on the mounting frame, a transmission shaft of the second electric cylinder is fixedly connected to the insertion rod, the insertion rod is located below the detection probe, and the distance between the detection probe and the insertion rod is the same as the distance between two adjacent detection holes.

[0010] Preferably, the lifting assembly includes: The screw rod is rotatably connected between the top ring and the bottom ring. A servo motor is fixedly mounted on the top ring, and the output shaft of the servo motor is fixedly connected to the top of the screw rod. The connecting bar is fixedly connected to the circular plate and is threadedly connected to the screw rod.

[0011] Preferably, the interior of the soil-taking ring is slidably connected to a piston, the detection holes are all located below the piston, the top of the piston is fixedly connected to a movable rod, the top of the movable rod passes through the circular plate and extends to the top of the circular plate and is fixedly connected to a handle, a first spring is sleeved on the movable rod, the first spring is located between the circular plate and the piston, a negative pressure assembly is connected to the piston, and the negative pressure assembly is used to drive the piston and the soil-taking ring to move relative to each other.

[0012] Preferably, the negative pressure component includes: A strip groove is provided on one side of the movable rod, a first limit block and a second limit block are fixedly connected to the interior of the strip groove, a guiding inclined surface is provided on the top of the first limit block and the second limit block, and the first limit block is located above the second limit block; A fixed plate, the fixed plate is fixedly connected to the top of the circular plate, a connecting plate is provided on one side of the fixed plate, a baffle is fixedly connected to the connecting plate, one end of the baffle is located at the bottom of the first limit block, a plurality of connecting pins are fixedly connected to the connecting plate, the connecting pins are all slidably inserted on the fixed plate, and a second spring is sleeved on the connecting pins, and the second spring is fixedly connected between the fixed plate and the connecting plate; Two support bars, both of which are fixedly connected to the top of the top ring, and both of which are located below the handle.

[0013] Preferably, a plurality of anti-slip protrusions are fixedly connected to the bottom of the bottom ring.

[0014] A detection method for a soil heavy metal pollution detection device, the method comprising the following steps: Step 1: Place the bottom ring on the soil surface and drive the circular plate down through the action of the lifting assembly. The sliding bar on the circular plate slides along the sliding joint of the polished rod and limits the movement of the circular plate, so that the circular plate descends vertically and drives the soil ring to penetrate into the soil. When the soil ring penetrates into the soil, the inspector needs to hold the top ring and apply downward pressure; Step 2: After the soil ring is inserted into the soil, the lifting assembly continues to drive the circular plate to rise and bring out the soil inside the soil ring. The multiple detection holes on the soil ring move from top to bottom to the end of the detection probe. The driving assembly drives the detection probe to move in the direction of the corresponding detection hole. The detection probe detects heavy metals in the soil at different depths from top to bottom, and the data is displayed by the detector; Step 3. During the reciprocating movement of the detection probe, the water supply assembly supplies water to the inside of the annular shell and sprays water along the nozzle to clean the detection probe. As the detection probe moves, the detection probe can be fully cleaned, so that the detection probe can clean the dirt on the surface after each movement and detection.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention collects soil by cutting at the bottom end of the soil collecting ring, which effectively reduces the soil disturbance during the soil collecting process. The detection probes are driven into the corresponding detection holes in sequence during the rising process of the soil collecting ring to detect heavy metals. The detection probes are cleaned during the detection process, which reduces the detection errors caused by the adhesion of soil at different depths and improves the accuracy of the layered detection data.

[0016] 2. The magnetic pin moves in a one-way cycle along the inside of the circular groove through the repulsion and guidance of the permanent magnet block, so that when the detection probe enters the detection hole and performs heavy metal detection, the multiple nozzles inside the annular shell will not spray water for flushing. Only when the detection probe completes a single detection and returns, the multiple nozzles inside the annular shell will spray water for flushing the detection probe, thereby reducing unnecessary flushing processes and reducing the waste of water resources.

[0017] 3. The drive shaft of the second electric cylinder drives the rod to be inserted into the corresponding detection hole, so that a reserved hole is formed at the detection position of the soil, reducing the resistance when the detection probe is inserted. The insertion of the rod squeezes and makes way for the harder stones and gravel, reducing the contact damage caused by stones and gravel to the detection probe and extending the service life of the detection probe. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a first structural diagram of the present invention; Figure 2 It is a second structural schematic diagram of the present invention; Figure 3 For the present invention Figure 2 A schematic diagram of the structure enlargement at point A; Figure 4 This is a schematic diagram of a first matching structure of the mounting frame, the detection assembly, and the insertion rod of the present invention; Figure 5 For the present invention Figure 4 A magnified schematic diagram of the structure at point B in FIG; Figure 6 This is a schematic diagram of a second matching structure of the mounting frame, the detection assembly, and the insertion rod of the present invention; Figure 7 This is a schematic diagram of the matching structure of the sliding block, magnetic pin and guide plate of the present invention; Figure 8 This is a cross-sectional diagram of the cooperative structure of the soil collecting ring, the piston and the movable rod of the present invention; Figure 9 For the present invention Figure 8 Schematic diagram of the enlarged structure at point C in FIG.

[0019] In the figure: 1, soil ring; 2, detection hole; 3, bottom ring; 4, top ring; 5, polished rod; 6, circular plate; 7, sliding bar; 8, mounting frame; 9, detection assembly; 901, detector; 902, detection probe; 10, annular housing; 11, nozzle; 12, movable plate; 13, limit pin; 14, first electric cylinder; 15, water tank; 16, water pump; 17, connecting pipe; 18, laser receiver; 19, sliding block; 20, laser transmitter; 2 1. Magnetic pin; 22. Guide plate; 23. Circular groove; 24. Permanent magnet; 25. Insert rod; 26. Second electric cylinder; 27. Screw rod; 28. Servo motor; 29. ​​Connecting strip; 30. Piston; 31. Movable rod; 32. Handle; 33. First spring; 34. Strip groove; 35. First limit block; 36. Second limit block; 37. Fixed plate; 38. Connecting plate; 39. Baffle; 40. Connecting pin; 41. Second spring; 42. Support bar. DETAILED DESCRIPTION

[0020] The following description is intended to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are merely examples, and those skilled in the art may conceive of other obvious variations.

[0021] like Figures 1 to 9 The soil heavy metal pollution detection device shown includes a soil sampling ring 1, the bottom end of which is provided with an inclined cutting edge, and further includes: Multiple detection holes 2 are vertically opened on the surface of the soil ring 1, and the distance between two adjacent detection holes 2 is the same; The bottom ring 3 is sleeved on the surface of the soil borrowing ring 1 and is located at the bottom of the soil borrowing ring 1; A top ring 4 is provided above the soil collecting ring 1, and a plurality of polished rods 5 are fixedly connected between the top ring 4 and the bottom ring 3; A circular plate 6 is fixedly connected to the top of the soil ring 1. A plurality of sliding bars 7 are fixedly connected to the circular plate 6. Each sliding bar 7 is slidably inserted on the corresponding polished rod 5. A lifting assembly is provided on the circular plate 6. The mounting frame 8 is fixedly connected to the bottom ring 3. A detection assembly 9 is fixedly installed inside the mounting frame 8. The detection assembly 9 includes a detector 901 and a detection probe 902. A conductive wire is connected between the detector 901 and the detection probe 902. The detection probe 902 is arranged opposite to the detection hole 2; The annular housing 10 is fixedly connected to the mounting frame 8. The end of the detection probe 902 is sleeved inside the annular housing 10. A plurality of nozzles 11 are fixedly connected to the inner wall of the annular housing 10 along the circumferential direction. A water supply assembly is provided on the annular housing 10 and is used to supply water to the interior of the annular housing 10; A driving assembly is provided on the detection probe 902 and is used to drive the detection probe 902 to move back and forth laterally; In the existing technology, the heavy metal content in the soil is detected by moving the metal detection equipment deep into the soil. During the soil heavy metal detection process, it is necessary to perform layered detection on the soil at different depths and compare the detection data to analyze the relationship between the heavy metal content and the soil depth. When the metal detection equipment moves deeply into the soil for detection, the detection end of the metal detection equipment causes a large amount of disturbance to the soil, resulting in mixing of soil at different depths. In addition, when the detection end moves downward from the soil surface, the detection end surface will adhere to the soil at different depths, making it difficult to distinguish, thereby reducing the accuracy of the layered detection data. Before testing the soil, the bottom ring 3 is placed on the soil surface, and the circular plate 6 is driven to descend by the action of the lifting assembly. The sliding bar 7 on the circular plate 6 slides along the sliding joint of the polished rod 5 and moves the circular plate 6 to a limit position, so that the circular plate 6 descends vertically and drives the soil-taking ring 1 to penetrate into the soil. It should be noted that when the soil-taking ring 1 penetrates into the soil, the inspection personnel need to press the top ring 4 and apply downward pressure to ensure that the soil-taking ring 1 can smoothly penetrate into the soil to take soil. After the soil sampling ring 1 is inserted into the soil, the circular plate 6 continues to rise through the action of the lifting assembly, and the soil inside the soil sampling ring 1 is brought out. In the process above the soil sampling ring 1, the multiple detection holes 2 on the soil sampling ring 1 move from top to bottom in sequence to the end of the detection probe 902, and when the corresponding detection hole 2 is coaxial with the detection probe 902, the lifting assembly stops moving, and at the same time the driving assembly drives the detection probe 902 to move toward the corresponding detection hole 2, and is inserted into the soil sampling ring 1 along the detection hole 2 for heavy metal detection. Therefore, in the process of the soil sampling ring 1 rising, the detection probe 902 can perform heavy metal detection on the soil of different depths from top to bottom in sequence, and display the data through the detector 901, which is convenient for the detection personnel to record and compare the data; During the reciprocating movement of the detection probe 902, the water supply assembly supplies water to the interior of the annular housing 10 and sprays water along the nozzle 11 to clean the detection probe 902. As the detection probe 902 moves, the detection probe 902 can be fully cleaned. After each movement and detection, the detection probe 902 can clean the soil carried on the surface, ensuring that soil at different depths is not mixed, thereby ensuring the accuracy of the layered detection data. The present invention allows soil to enter the interior of the soil sampling ring 1 through the contact and ring cutting between the bottom end of the soil sampling ring 1 and the soil, effectively reducing the soil disturbance generated during the soil sampling process, and driving the detection probe 902 to enter the corresponding detection hole 2 in sequence during the rising process of the soil sampling ring 1 to perform heavy metal detection, and clean the detection probe 902 during the detection process, reducing the detection error caused by the adhesion of soil at different depths, and improving the accuracy of the layered detection data.

[0022] As a further embodiment of the present invention, the drive assembly comprises: The movable plate 12 is fixedly connected to the detection probe 902, and a plurality of limit pins 13 are fixedly connected to the movable plate 12, and the limit pins 13 are all slidably connected to the mounting frame 8; A first electric cylinder 14 is fixedly mounted inside the mounting frame 8 , and a transmission shaft of the first electric cylinder 14 is fixedly connected to the movable plate 12 ; The movable plate 12 is driven to move by the transmission shaft of the first electric cylinder 14, and the limit pin 13 on the movable plate 12 slides along the sliding joint of the mounting frame 8, thereby limiting the movement of the movable plate 12. The movable plate 12 drives the detection probe 902 to move to the corresponding detection hole 2 and perform heavy metal detection. After the detection is completed, the transmission shaft of the first electric cylinder 14 moves in the opposite direction to drive the movable plate 12 and the detection probe 902 to return to the initial position.

[0023] As a further embodiment of the present invention, the water supply assembly includes: The water storage tank 15 is fixedly connected to the top of the mounting frame 8; A water pump 16 is fixedly mounted on the water tank 15 , with the water inlet of the water pump 16 fixedly connected to the water tank 15 , and the water outlet of the water pump 16 fixedly connected to a connecting pipe 17 , one end of which is fixedly connected to the annular housing 10 ; Water is stored in the water tank 15. When the detection probe 902 moves, the water pump 16 works to pump the water source inside the water tank 15 into the connecting pipe 17, and enters the inside of the annular shell 10, and then sprays it out from multiple nozzles 11, thereby performing relative movement and flushing on the surface of the detection probe 902.

[0024] As a further embodiment of the present invention, a laser receiver 18 is fixedly mounted on the water pump 16, a sliding block 19 is slidably connected to the mounting frame 8, a laser emitter 20 is fixedly mounted on the top of the sliding block 19, and the laser emitter 20 is located directly below the laser receiver 18, a magnetic pin 21 is fixedly connected to the bottom of the sliding block 19, a guide plate 22 is fixedly connected to the top of the movable plate 12, and a circular groove 23 is opened on the top of the guide plate 22 (such as Figure 7As shown), permanent magnets 24 are fixedly installed at the four corners of the serpentine groove 23. The permanent magnets 24 directly below and at the diagonal positions of the magnetic pin 21 are positive poles, and the other two permanent magnets 24 are negative poles, and the magnetic pin 21 is negative pole; When the detection probe 902 is in the initial position, the laser transmitter 20 is located directly below the laser receiver 18 and continuously transmits a laser signal to the laser receiver 18. When the laser receiver 18 receives the laser signal, the controller connected to the laser receiver 18 controls the water pump 16 to be in the closed state. When the movable plate 12 drives the detection probe 902 to move into the corresponding detection hole 2 and detects the soil, the guide plate 22 moves synchronously with the movable plate 12 and guides and limits the magnetic pin 21 through the round-shaped groove 23. The magnetic pin 21 moves from the round-shaped groove 23 as the guide plate 22 moves. The laser receiver 18 moves from one end to the other end, and when the negative magnetic pin 21 moves to the top of the permanent magnet block 24 with the same negative pole, the magnetic pin 21 moves to the top of the other positive permanent magnet block 24 due to the repulsion between the same poles and the attraction of the adjacent positive permanent magnet block 24, and drives the sliding block 19 to move along the sliding connection, so that the laser emitter 20 moves away from the bottom of the laser receiver 18. When the laser receiver 18 cannot receive the laser signal emitted by the laser emitter 20, the controller connected to the laser receiver 18 controls the water pump 16 to open and pump water into the connecting pipe 17. Thus, when the detection probe 902 detects heavy metals in the soil and returns to its initial position, the nozzle 11 inside the annular shell 10 sprays water and rinses the detection probe 902. After the detection probe 902 returns to its initial position, the magnetic pin 21 continues to return from the top of the other negative permanent magnet block 24 to the top of the initial positive permanent magnet block 24, so that the laser transmitter 20 moves back to the bottom of the laser receiver 18 and the laser receiver 18 receives the laser signal again, so that the controller connected to the laser receiver 18 continues to control the water pump 16 to be in the off state, and the movable plate During the process of driving the detection probe 902 to perform a single reciprocating movement by 12, the magnetic pin 21 performs a unidirectional circular movement along the inside of the tortuous groove 23 through the repulsion and guidance of the permanent magnet block 24, so that the detection probe 902 enters the detection hole 2 and performs heavy metal detection. During this process, the multiple nozzles 11 inside the annular shell 10 will not spray water for flushing. Only when the detection probe 902 completes a single detection and returns, the multiple nozzles 11 inside the annular shell 10 will spray water for flushing the detection probe 902, thereby reducing unnecessary flushing processes and reducing the waste of water resources.

[0025] As a further embodiment of the present invention, a rod 25 is slidably inserted into the bottom ring 3, a second electric cylinder 26 is fixedly mounted on the mounting frame 8, a drive shaft of the second electric cylinder 26 is fixedly connected to the rod 25, the rod 25 is located below the detection probe 902, and the distance between the detection probe 902 and the rod 25 is the same as the distance between two adjacent detection holes 2; During the process of taking soil and rising, the multiple detection holes 2 move upward synchronously, and before the detection probe 902 enters the corresponding detection hole 2 to perform soil detection, the detection hole 2 first moves through the insertion rod 25, and the transmission shaft of the second electric cylinder 26 drives the insertion rod 25 to be inserted into the corresponding detection hole 2, so that a reserved hole is formed at the soil detection position, reducing the resistance when the detection probe 902 is inserted, and the insertion of the insertion rod 25 squeezes and makes way for the harder stones and gravel, reducing the contact damage of the stones and gravel to the detection probe 902, and extending the service life of the detection probe 902.

[0026] As a further embodiment of the present invention, the lifting assembly comprises: The screw rod 27 is rotatably connected between the top ring 4 and the bottom ring 3. A servo motor 28 is fixedly mounted on the top ring 4. The output shaft of the servo motor 28 is fixedly connected to the top of the screw rod 27. Connecting bar 29, connecting bar 29 is fixedly connected to circular plate 6, and connecting bar 29 is threadedly connected to screw rod 27; The output shaft of the servo motor 28 rotates, driving the screw rod 27 to rotate between the top ring 4 and the bottom ring 3, and the circular plate 6 is lowered through the threaded connection between the connecting bar 29 and the screw rod 27. When the output shaft of the servo motor 28 rotates in the opposite direction, the circular plate 6 rises along with the connecting bar 29.

[0027] As a further embodiment of the present invention, the interior of the soil ring 1 is slidably connected to a piston 30 (such as Figure 9 As shown in the figure, the detection holes 2 are all located below the piston 30. The top of the piston 30 is fixedly connected to a movable rod 31. The top of the movable rod 31 passes through the circular plate 6 and extends to the top of the circular plate 6 and is fixedly connected to a handle 32. A first spring 33 is sleeved on the movable rod 31. The first spring 33 is located between the circular plate 6 and the piston 30. A negative pressure component is connected to the piston 30, which is used to drive the piston 30 and the soil ring 1 to move relative to each other; When the soil collecting ring 1 is inserted into the soil to collect soil, the piston 30 moves downward synchronously with the soil collecting ring 1, and when the soil height inside the soil collecting ring 1 is above the detection hole 2, the piston 30 moves upward relatively along the soil collecting ring 1, so that there is a certain negative pressure area between the top of the soil inside the soil collecting ring 1 and the piston 30. When the soil collecting ring 1 moves upward to bring out the soil, the negative pressure prevents the soil inside the soil collecting ring 1 from falling out, thereby ensuring the soil collecting efficiency of the soil collecting ring 1.

[0028] As a further embodiment of the present invention, the negative pressure component includes: A strip groove 34 is provided on one side of the movable rod 31. A first limit block 35 and a second limit block 36 are fixedly connected to the interior of the strip groove 34. The tops of the first limit block 35 and the second limit block 36 are both provided with guiding inclined surfaces. The first limit block 35 is located above the second limit block 36. A fixing plate 37 is fixedly connected to the top of the circular plate 6. A connecting plate 38 is provided on one side of the fixing plate 37. A blocking bar 39 is fixedly connected to the connecting plate 38. One end of the blocking bar 39 is located at the bottom of the first limit block 35. A plurality of connecting pins 40 are fixedly connected to the connecting plate 38. The connecting pins 40 are all slidably inserted on the fixing plate 37. A second spring 41 is sleeved on the connecting pins 40. The second spring 41 is fixedly connected between the fixing plate 37 and the connecting plate 38. Two support bars 42, two support bars 42 (such as Figure 8 As shown) are fixedly connected to the top of the top ring 4, and the support bars 42 are all located below the handle 32; The bottom of the first limit block 35 is blocked and supported by one end of the blocking bar 39 to prevent the piston 30 and the movable rod 31 from moving downward relative to each other along the soil collecting ring 1. When the soil collecting ring 1 moves downward, the piston 30 and the movable rod 31 move downward synchronously with the soil collecting ring 1, and when all the detection holes 2 are filled with soil, the handle 32 contacts the top of the support bar 42. When the soil collecting ring 1 continues to descend, the handle 32 cannot move further downward due to the obstruction of the support bar 42, so that the piston 30 and the movable rod 31 move upward relative to the soil collecting ring 1 and squeeze the first spring 33 to generate compression deformation. When the piston 30 moves upward relative to the soil collecting ring 1, a negative pressure is formed between the piston 30 and the top of the soil inside the soil collecting ring 1. When the piston 30 and the movable rod 31 move upward relative to the soil-taking ring 1, the blocking bar 39 moves downward relative to the inside of the strip groove 34, and is squeezed by the guiding inclined surface at the top of the second limit block 36 and one end of the blocking bar 39, so that the blocking bar 39 moves to make way, and drives the connecting plate 38 and the connecting pin 40 to move synchronously, thereby squeezing the second spring 41 to produce compression deformation. When the second limit block 36 is located above the blocking bar 39, the second spring 41 squeezes the blocking bar 39 to return to its original position through elastic expansion, and is located at the bottom of the second limit block 36, so that the soil-taking ring 1 finishes taking soil and moves upward. When moving upward, the blocking of the second limit block 36 by the blocking bar 39 can replace the squeezing support of the handle 32 by the support bar 42, preventing the piston 30 from resetting under the elastic action of the first spring 33, ensuring that there is always negative pressure in the soil inside the soil ring 1 when it rises. When the inspection is completed, the inspector moves the connecting plate 38 to disengage one end of the blocking bar 39 from the strip groove 34, and presses the handle 32 downward, so that the movable rod 31 drives the piston 30 to move downward inside the soil ring 1, and pushes all the soil inside the soil ring 1 downward, completing the soil cleaning after the inspection.

[0029] As a further embodiment of the present invention, a plurality of anti-slip protrusions are fixedly connected to the bottom of the bottom ring 3; By setting anti-slip protrusions at the bottom of the bottom ring 3, the friction between the bottom ring 3 and the soil surface is increased, preventing the bottom ring 3 and the soil surface from moving relative to each other during the soil taking process of the soil taking ring 1, ensuring the verticality of the soil taking ring 1 during the descent process, and improving the soil taking efficiency.

[0030] A detection method for a soil heavy metal pollution detection device, the method comprising the following steps: Step 1: Place the bottom ring 3 on the soil surface, and drive the circular plate 6 down through the action of the lifting assembly. The sliding bar 7 on the circular plate 6 slides along the sliding joint of the polished rod 5 and limits the movement of the circular plate 6, so that the circular plate 6 descends vertically and drives the soil ring 1 to penetrate into the soil. When the soil ring 1 penetrates into the soil, the inspector needs to press the top ring 4 and apply downward pressure; Step 2: After the soil ring 1 is inserted into the soil, the circular plate 6 is driven to rise by the action of the lifting assembly, and the soil inside the soil ring 1 is brought out. The multiple detection holes 2 on the soil ring 1 are moved from top to bottom to the end of the detection probe 902. The driving assembly drives the detection probe 902 to move toward the corresponding detection hole 2. The detection probe 902 performs heavy metal detection on the soil at different depths from top to bottom, and the data is displayed by the detector 901; Step 3. During the reciprocating movement of the detection probe 902, the water supply assembly supplies water to the inside of the annular shell 10 and sprays water along the nozzle 11 to clean the detection probe 902. As the detection probe 902 moves, the detection probe 902 can be fully cleaned, so that the detection probe 902 can clean the dirt carried on the surface after each movement detection.

[0031] Working principle of the present invention: Before testing the soil, the bottom ring 3 is placed on the soil surface, and the circular plate 6 is driven to descend by the action of the lifting assembly. The sliding bar 7 on the circular plate 6 slides along the sliding joint of the polished rod 5 and moves the circular plate 6 to a limit position, so that the circular plate 6 descends vertically and drives the soil-taking ring 1 to penetrate into the soil. It should be noted that when the soil-taking ring 1 penetrates into the soil, the inspection personnel need to press the top ring 4 and apply downward pressure to ensure that the soil-taking ring 1 can smoothly penetrate into the soil to take soil. After the soil sampling ring 1 is inserted into the soil, the circular plate 6 continues to rise through the action of the lifting assembly, and the soil inside the soil sampling ring 1 is brought out. In the process above the soil sampling ring 1, the multiple detection holes 2 on the soil sampling ring 1 move from top to bottom in sequence to the end of the detection probe 902, and when the corresponding detection hole 2 is coaxial with the detection probe 902, the lifting assembly stops moving, and at the same time the driving assembly drives the detection probe 902 to move toward the corresponding detection hole 2, and is inserted into the soil sampling ring 1 along the detection hole 2 for heavy metal detection. Therefore, in the process of the soil sampling ring 1 rising, the detection probe 902 can perform heavy metal detection on the soil of different depths from top to bottom in sequence, and display the data through the detector 901, which is convenient for the detection personnel to record and compare the data; During the reciprocating movement of the detection probe 902, the water supply assembly supplies water to the inside of the annular shell 10 and sprays water along the nozzle 11 to clean the detection probe 902. As the detection probe 902 moves, the detection probe 902 can be fully cleaned, so that the detection probe 902 can clean the soil carried on the surface after each movement detection, ensuring that there is no mixing between the soils of different depths, thereby ensuring the accuracy of the layered detection data.

[0032] The basic principles, main features and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions only illustrate the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements fall within the scope of the present invention as claimed, and the scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A soil heavy metal pollution detection device, comprising a soil sampling ring, the bottom end of which is provided with an inclined cutting edge, characterized in that: Also includes: Multiple detection holes are vertically opened on the surface of the soil ring, and the distance between two adjacent detection holes is the same; A bottom ring is sleeved on the surface of the soil borrowing ring and is located at the bottom of the soil borrowing ring; A top ring is arranged above the soil collecting ring, and a plurality of polished rods are fixedly connected between the top ring and the bottom ring; A circular plate is fixedly connected to the top of the soil ring, a plurality of sliding bars are fixedly connected to the circular plate, each sliding bar is slidably inserted on the corresponding polished rod, and a lifting assembly is provided on the circular plate; The mounting frame is fixedly connected to the bottom ring, and a detection component is fixedly installed inside the mounting frame. The detection component includes a detector and a detection probe. A conductive line is connected between the detector and the detection probe, and the detection probe is arranged opposite to the detection hole; An annular shell is fixedly connected to the mounting frame, the end of the detection probe is sleeved inside the annular shell, and a plurality of nozzles are fixedly connected to the inner wall of the annular shell along the circumferential direction; A water supply assembly is provided on the annular housing and is used to supply water to the interior of the annular housing; The driving assembly is arranged on the detection probe and is used to drive the detection probe to move back and forth laterally.

2. A soil heavy metal pollution detection device according to claim 1, characterized in that: The drive components include: The movable plate is fixedly connected to the detection probe, and a plurality of limit pins are fixedly connected to the movable plate, and the limit pins are slidably connected to the installation frame; The first electric cylinder is fixedly mounted inside the mounting frame, and a transmission shaft of the first electric cylinder is fixedly connected to the movable plate.

3. A soil heavy metal pollution detection device according to claim 2, characterized in that: The water supply components include: A water storage tank is fixedly connected to the top of the mounting frame; The water pump is fixedly installed on the water tank, the water inlet end of the water pump is fixedly connected to the water tank, the water outlet end of the water pump is fixedly connected to a connecting pipe, and one end of the connecting pipe is fixedly connected to the annular shell.

4. The soil heavy metal pollution detection device according to claim 3, characterized in that: A laser receiver is fixedly installed on the water pump, a sliding block is slidably connected to the mounting frame, a laser emitter is fixedly installed on the top of the sliding block, and the laser emitter is located directly below the laser receiver. A magnetic pin is fixedly connected to the bottom of the sliding block, and a guide plate is fixedly connected to the top of the movable plate. A circular groove is provided on the top of the guide plate, and permanent magnets are fixedly installed at the four corners of the circular groove. The permanent magnets directly below and at the diagonal corners of the magnetic pin are positive, the other two permanent magnets are negative, and the magnetic pin is negative.

5. The soil heavy metal pollution detection device according to claim 2, characterized in that: An insertion rod is slidably inserted on the bottom ring, a second electric cylinder is fixedly installed on the mounting frame, a transmission shaft of the second electric cylinder is fixedly connected to the insertion rod, the insertion rod is located below the detection probe, and the distance between the detection probe and the insertion rod is the same as the distance between two adjacent detection holes.

6. The soil heavy metal pollution detection device according to claim 1, characterized in that: The lifting assembly includes: The screw rod is rotatably connected between the top ring and the bottom ring. A servo motor is fixedly mounted on the top ring, and the output shaft of the servo motor is fixedly connected to the top of the screw rod. The connecting bar is fixedly connected to the circular plate and is threadedly connected to the screw rod.

7. The soil heavy metal pollution detection device according to claim 1, characterized in that: The interior of the soil-taking ring is slidably connected to a piston, and the detection holes are all located below the piston. A movable rod is fixedly connected to the top of the piston. The top of the movable rod passes through the circular plate and extends to the top of the circular plate and is fixedly connected to a handle. A first spring is sleeved on the movable rod, and the first spring is located between the circular plate and the piston. A negative pressure component is connected to the piston, and the negative pressure component is used to drive the piston and the soil-taking ring to move relative to each other.

8. The soil heavy metal pollution detection device according to claim 7, characterized in that: The negative pressure components include: A strip groove is provided on one side of the movable rod, a first limit block and a second limit block are fixedly connected to the interior of the strip groove, a guiding inclined surface is provided on the top of the first limit block and the second limit block, and the first limit block is located above the second limit block; A fixed plate, the fixed plate is fixedly connected to the top of the circular plate, a connecting plate is provided on one side of the fixed plate, a baffle is fixedly connected to the connecting plate, one end of the baffle is located at the bottom of the first limit block, a plurality of connecting pins are fixedly connected to the connecting plate, the connecting pins are all slidably inserted on the fixed plate, and a second spring is sleeved on the connecting pins, and the second spring is fixedly connected between the fixed plate and the connecting plate; Two support bars, both of which are fixedly connected to the top of the top ring, and both of which are located below the handle.

9. The soil heavy metal pollution detection device according to claim 1, characterized in that: The bottom of the bottom ring is fixedly connected with a plurality of anti-slip protrusions.

10. A detection method for a soil heavy metal pollution detection device, applicable to a soil heavy metal pollution detection device according to any one of claims 1 to 9, characterized in that: The method comprises the following steps: Step 1: Place the bottom ring on the soil surface and drive the circular plate down through the action of the lifting assembly. The sliding bar on the circular plate slides along the sliding joint of the polished rod and limits the movement of the circular plate, so that the circular plate descends vertically and drives the soil ring to penetrate into the soil. When the soil ring penetrates into the soil, the inspector needs to hold the top ring and apply downward pressure; Step 2: After the soil ring is inserted into the soil, the lifting assembly continues to drive the circular plate to rise and bring out the soil inside the soil ring. The multiple detection holes on the soil ring move from top to bottom to the end of the detection probe. The driving assembly drives the detection probe to move in the direction of the corresponding detection hole. The detection probe detects heavy metals in the soil at different depths from top to bottom, and the data is displayed by the detector; Step 3. During the reciprocating movement of the detection probe, the water supply assembly supplies water to the inside of the annular shell and sprays water along the nozzle to clean the detection probe. As the detection probe moves, the detection probe can be fully cleaned, so that the detection probe can clean the dirt on the surface after each movement and detection.

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