Soil heavy metal pollution detection device and method

Abstract

The invention relates to a soil heavy metal pollution detection device and method. The soil heavy metal pollution detection device comprises a drill bit part, a driving part and a detection assembly arranged between the drill bit part and the driving part. The detection assembly comprises an outer cylinder, a driving shaft, a central sleeve, an upper driving sleeve, a lower driving sleeve, a positioning rod, a driving seat and a detection probe; the upper part and the lower part of the outer cylinder are respectively connected with the driving piece and the drill bit part; left-hand thread sections are arranged above and below the driving shaft; the upper driving sleeve and the lower driving sleeve are correspondingly in threaded connection with the two left-hand thread sections; the central sleeve is fixed in the center of the outer cylinder; the positioning rod is radially fixed on the central sleeve along the outer cylinder; the outer cylinder is provided with a detection opening, the front end of the positioning rod is slidably sleeved with a push plate, a detection probe corresponding to the detection opening is fixed to the push plate, and the driving base can drive the push plate to move forwards so that the detection probe can be pushed out of the detection opening. By laterally pushing out the detection probe, soil heavy metal detection at different depths can be carried out at the same position, and the limitation that multi-point distribution is needed in a traditional method is avoided.

Description

Technical Field

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

[0002] With the rapid development of industrialization and urbanization, the problem of heavy metal pollution in soil is becoming increasingly serious, posing a huge threat to the ecological environment and human health. Rapid and accurate detection of heavy metal content in soil is crucial for pollution assessment, risk control, and treatment and remediation. However, existing soil heavy metal detection technologies, especially in-situ detection technologies, still have many limitations and are difficult to meet the actual needs.

[0003] At present, soil heavy metal detection is mainly divided into two methods: laboratory detection and in-situ detection. Laboratory detection requires collecting soil samples, and after pretreatment, high-precision instruments such as atomic absorption spectrometry (AAS) and inductively coupled plasma mass spectrometry (ICP-MS) are used for analysis. Although the results of laboratory detection are accurate and reliable, there are problems such as cumbersome sample collection, transportation, and processing, long time consumption, and high cost, making it difficult to achieve large-area and rapid detection.

[0004] In-situ detection technology can directly perform real-time detection in the fields, with advantages such as rapidity, convenience, and low cost. Common in-situ detection technologies include X-ray fluorescence spectrometry (XRF), laser-induced breakdown spectroscopy (LIBS), etc. These technologies mainly contact the soil surface through a probe, use light or laser of a specific wavelength to excite heavy metal elements in the soil, and determine the heavy metal content by analyzing the emission spectrum. The probes of existing in-situ detection technologies usually can only contact the soil surface, with limited detection depth, and it is difficult to obtain heavy metal information in deep soil. However, the distribution of heavy metals in soil often has vertical heterogeneity, and the heavy metal content in the surface soil does not represent the situation of deep soil.

[0005] In order to obtain deep soil information, drilling is sometimes required. However, the drilling process will cause disturbance to the surrounding soil, resulting in the soil quality around the drill hole becoming a mixed state, destroying the original structure and heavy metal distribution characteristics of the soil. Direct detection of the mixed soil will lead to distorted detection results and cannot accurately reflect the true heavy metal content.

[0006] Based on this, it is necessary to research a device and method for detecting heavy metal pollution in soil. Summary of the Invention

[0007] In view of this, the object of the present invention is to provide a device and method for detecting soil heavy metal pollution, which effectively solves the problem that the existing soil heavy metal detection structure cannot arrange a side push structure in the drilling structure, so that the detection probe cannot be pushed laterally and penetrate deep into the soil to achieve detection at different depths, resulting in poor accuracy of the detection results.

[0008] To achieve the above object, the technical solution adopted by the present invention is: a device for detecting soil heavy metal pollution, including a drill head, a driving part, and a detection component arranged between the drill head and the driving part; the detection component includes an outer cylinder, a driving shaft, a central sleeve, an upper driving sleeve, a lower driving sleeve, a positioning rod, a driving seat, a detection probe, and a protective plate; the upper and lower parts of the outer cylinder are respectively connected to the driving member and the drill head, so that when the driving part receives rotational drive, the outer cylinder conducts the power to the drill head; The driving shaft is concentrically and rotatably arranged inside the outer cylinder; its upper part is connected to a driving source for making it rotate; reverse thread sections are arranged on the upper and lower parts of the driving shaft, and the upper driving sleeve and the lower driving sleeve are correspondingly threadedly connected to the two reverse thread sections; The central sleeve is fixed to the center of the outer cylinder through a support rod, and its middle part is rotationally matched with the driving shaft; The positioning rod is fixed to the central sleeve along the radial direction of the outer cylinder; the driving seat is slidably sleeved on the positioning rod, and the upper and lower parts of the driving seat are connected to the upper driving sleeve and the lower driving sleeve through driving rods hinged at both ends; a detection port is provided on the outer cylinder, A push plate is slidably sleeved on the front end of the positioning rod, and a detection probe corresponding to the detection port is fixed on the push plate. The driving seat can drive the push plate forward to push the detection probe out of the detection port.

[0009] Further, multiple groups of the driving seat, the detection probe, and the protective plate are provided, and the support rod and the driving seat are alternately arranged inside the outer cylinder, so as to form multiple groups of detection components inside the outer cylinder.

[0010] Further, a shaft seat is provided at the bottom of the end outer cylinder, the bottom of the driving shaft is rotatably arranged inside the shaft seat, and a connecting head for fixing the drill head is provided at the bottom of the shaft seat.

[0011] Further, a connecting component is further included. The connecting component includes a coupling. Corresponding connecting parts are provided on the upper and lower parts of the outer cylinder, and the connecting parts are combined and connected to connect the upper and lower two sleeves together. The driving shafts are connected through a coupling, so as to form multiple detection components along the axial direction of the outer cylinder.

[0012] Further, the front end of the positioning rod is provided with an open inner cavity, a limiting hole is opened on the side wall of the inner cavity, a fixing plate is fixedly sleeved in the inner cavity, the push plate is slidably sleeved in the inner cavity, and a driving block extends from the limiting hole. A spring is arranged between the push plate and the fixing plate.

[0013] Further, a mounting seat is provided on the inner wall of the outer cylinder, and a mounting block is provided on the support rod. The mounting block is adaptively clamped on the mounting seat and fixed.

[0014] Further, a deployment arm is provided at the front end of the drive seat, and a protective plate is hinged at the detection port. The deployment arm can deploy the protective plate outward as it advances.

[0015] Further, a sliding groove is provided at the bottom of the protective plate, and the deployment arm is connected to the sliding groove through a sliding rod.

[0016] Further, the drive source is a motor. A motor chamber is provided at the upper part of the outer cylinder, and a battery is built in the motor chamber.

[0017] A method for detecting soil heavy metal pollution uses the above-mentioned soil heavy metal pollution detection device. Step 1: Combine the drive part, the detection component and the drill head into one; connect the drive part to the drive device. Under the drive of the drive device, the drive part, the detection component and the drill head can rotate. Step 2: Align the drill head with the detection point, start the drive device, and the drill head penetrates deep into the soil downward. According to the scale line preset on the outer cylinder surface, judge the penetration depth. Step 3: When reaching the designated point, drive the drive shaft to rotate through the drive source, so that the upper drive plate and the lower drive plate contract towards the central sleeve. Under the drive of the drive rod, the drive seat moves outward, and the detection probe is pierced into the corresponding soil on the side through the push plate. Step 4: Obtain the detection data of the corresponding soil through the detection probe, and upload the detection data to the computer through the wireless module. Step 5: After the detection is completed, operate the drive source in reverse to retract the detection probe inward. Step 6: Pull out the outer cylinder outward and perform the detection at the next detection point.

[0018] The beneficial effects of the above technical solutions are as follows: The present invention provides a soil heavy metal pollution detection device and method, aiming to solve the limitations of soil heavy metal detection in the prior art, especially the problem of being unable to obtain data at different depths at the same position in in-situ detection. Traditional drilling detection will damage the soil structure, resulting in mixed soil and affecting the accuracy of the detection results. Through the coordinated action of the drive shaft, the drive sleeve and the detection probe, the device can realize the detection of soil heavy metals at different depths at the same drilling position, avoiding the limitations of the need for multi-point distribution in the traditional method.

[0019] During implementation, the detection probe is pushed out and retracted laterally through the rotation of the drive shaft and the up-and-down movement of the drive sleeve. Specifically, the drive shaft is provided with reverse thread sections up and down, and the up-and-down movement of the drive sleeve realizes the lateral pushing out and retraction of the detection probe. The structure is simple and efficient. At the same time, the detection probe of the present invention is pushed out laterally from the outer tube and directly penetrates into the soil for detection, avoiding the disturbance of the surrounding soil by the drilling hole and ensuring the accuracy of the detection result.

[0020] In addition, a protective plate is configured in the detection port. The protective plate can spread loose soil through the unfolding arm to avoid the influence of mixed soil on the detection results, further improving the detection accuracy. At the same time, a spring is set between the push plate and the fixed plate, so that the detection probe can be elastically pushed when encountering hard soil, avoiding damage to the probe and protecting the probe at the same time. The spring can also reset the detection structure by itself and keep it in the initial position.

[0021] Therefore, the present invention solves the problems of complex operation, incomplete data acquisition, and drilling disturbance in the existing soil heavy metal detection technology, realizes in-situ multi-depth detection, and can perform soil heavy metal detection at different depths at the same location, avoiding the limitation of multi-point distribution required in traditional methods. By pushing out the detection probe laterally, soil disturbance is reduced, detection accuracy is improved, and automatic pushing out and retracting of the detection probe is realized, reducing the complexity of manual operation. It is easy to operate, has a stable structure, and is suitable for a variety of detection scenarios, providing people with an efficient and accurate detection method for conducting research on soil heavy metal pollution. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the implementation structure of the present invention; Figure 2 for Figure 1 Schematic diagram of the main structure; Figure 3 It is a schematic diagram of the internal structure of the present invention; Figure 4 It is a schematic diagram of the implementation structure of the detection component; Figure 5 for Figure 4 A schematic diagram of a top view structure; Figure 6 for Figure 5 Middle AA section view; Figure 7 for Figure 4 Schematic diagram of the main structure; Figure 8 for Figure 7 Middle BB section view; Figure 9 Schematic diagram of the internal structure of the outer cylinder; Figure 10 for Figure 9 Schematic diagram of the main structure.

[0023] Reference numerals: 1 - driving part, 2 - drill head part, 3 - detection assembly, 310 - driving shaft, 3011 - motor, 3012 - motor chamber, 3013 - stabilizing frame, 302 - upper reverse thread section, 303 - lower reverse thread section, 304 - upper driving sleeve, 305 - central sleeve, 306 - positioning rod, 307 - driving seat, 308 - driving rod, 309 - push plate, 310 - spring, 311 - fixing plate, 312 - detection probe, 313 - limiting hole, 314 - protective plate, 315 - unfolding arm, 316 - sliding groove, 317 - support rod, 318 - outer cylinder, 319 - detection port; 4 - connector, 5 - coupling. Detailed implementation manners

[0024] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation manners: Embodiment 1. This embodiment aims to provide a soil heavy metal pollution detection device, which is mainly used for in-situ heavy metal detection of soil. Traditional drilling detection will damage the soil structure, resulting in mixed soil and affecting the accuracy of detection results. When conducting on-site soil heavy metal pollution detection, based on the current heavy metal detection devices, generally, the probe is directly inserted into different depths of the soil, and different depths of heavy metal detection are obtained by adjusting the insertion depth. The operation method is troublesome, and the insertion detection can only be distributed at multiple points, and it is impossible to obtain detection data at different depths at one point, so the use is relatively limited. Based on this, this embodiment provides a soil heavy metal pollution detection device that can perform multi-point heavy metal detection along the vertical direction at one point, which helps researchers analyze the soil heavy metal pollution situation.

[0025] As shown in this embodiment Figure 1-4 A soil heavy metal pollution detection device includes a drill head part 2, a driving part 2, and a detection assembly 3 arranged between the drill head part 2 and the driving part 2; the drill head part 2 is a drill bit structure in terms of structure, and the driving part 2 can adopt a motor. The driving part 2 needs to provide fixed and rotational driving forces. For example, a fixed seat is fixed with a driving motor, and the driving part 2 is connected to the motor rotating shaft; or a hand-held pistol drill is used for operation, and the driving part 2 is connected to the hand-held pistol drill, and the drilling operation is carried out by hand.

[0026] As Figure 4As shown in the figure, the detection component 3 includes an outer cylinder 318, a driving shaft 301, a center sleeve 305, an upper driving sleeve 304, a lower driving sleeve, a positioning rod 306, a driving seat 307, a detection probe 312 and a protective plate 314; in terms of the implementation structure, the upper and lower parts of the outer cylinder 318 are respectively connected to the driving part 1 and the drill head 2, so that when the driving part 2 is driven by rotation, the outer cylinder 318 transmits power to the drill head 2; in this embodiment, the driving part 2 is fixed to the upper part of the outer cylinder 318, and the driving part 2 serves as a rotation driving source, which can rotate the outer cylinder 318, and drive the drill head 2 to rotate through the driving part 2 to drill into the soil. The surface of the outer cylinder 318 is provided with scale lines for judging the drilling depth.

[0027] The drive shaft 301 is coaxially rotatably arranged inside the outer cylinder 318; a drive source for rotating the drive shaft 301 is connected to its upper part; in terms of the implementation structure, the drive source is a motor 3011, and a motor compartment 3012 is arranged on the upper part of the outer cylinder 318, and a battery is arranged inside the motor compartment 3012. The motor compartment 3012 is arranged on the upper part of the outer cylinder 318, and the main body of the motor 3011 is fixed in the motor compartment, and its rotating shaft is rotatably arranged on the stable frame 3013, and is connected to the drive shaft 301 through a coupling, so that the rotation of the motor will drive the drive shaft 301 to rotate forward or reverse; in order to drive the motor, a power supply is configured in the motor compartment to provide power for the motor, and a charging head or a battery replacement compartment is arranged on the outside of the motor compartment.

[0028] The driving source may be manually driven. In this embodiment, the rotation of the driving shaft 301 may be realized by manual driving. For example, a bevel gear set is provided on the upper part of the outer cylinder 318. The bevel gear set guides the driving end head to the side. By manually twisting the driving head, the driving shaft 301 can be rotated forward or reversely. The driving unit 2 may be driven by a motor or manually to adapt to different operating environments and requirements.

[0029] In order to realize the lateral pushing action of the detection probe 312, in this embodiment, the driving shaft 301 is provided with reverse thread sections at the upper and lower parts, and the upper driving sleeve 304 and the lower driving sleeve are correspondingly threadedly connected on the two reverse thread sections; that is, after the driving shaft 301 rotates, the upper driving sleeve 304 and the lower driving shaft 301 move up and down along the driving shaft 301.

[0030] like Figure 6As shown in the figure, in order to limit the movement of the driving sleeve, in this embodiment, the central sleeve 305 is fixed to the center of the outer cylinder 318 through the support rod 317, and its middle part is rotationally matched with the driving shaft 301; the positioning rod 306 is fixed to the central sleeve 305 along the radial direction of the outer cylinder 318; the driving seat 307 is slidably sleeved on the positioning rod 306, and the upper and lower parts of the driving seat 307 are connected to the upper driving sleeve 304 and the lower driving sleeve through the driving rod 308 hinged at both ends; in this embodiment, a central sleeve 305 is arranged in the outer cylinder 318. The function of the central sleeve 305 is to further stabilize the driving shaft 301 and at the same time form a fixed base. The positioning rod 306 is fixed on the central sleeve 305, and the driving seat 307 is slidably sleeved thereon. The driving seat 307 is connected to the upper and lower driving sleeves through the driving rod 308 to realize the limit of the driving sleeve, and finally the driving seat 307 realizes the lateral pushing and pulling action according to the movement of the driving sleeve.

[0031] As Figure 6-7 As shown in the figure, the outer cylinder 318 is provided with a detection port 319. A push plate 309 is slidably sleeved on the front end of the positioning rod 306. A detection probe 312 corresponding to the detection port 319 is fixed on the push plate 309. The driving seat 307 can drive the push plate 309 forward to push the detection probe 312 out of the detection port 319. Thus, in this embodiment, the driving seat 307 is used as the pushing base, that is, the push plate 309 is used as the carrier of the detection probe 312, and the two are in a separated or combined structure. When in a combined structure, it directly slides laterally along with the movement of the driving seat 307.

[0032] In order to facilitate the assembly of the internal side-pushing component, in this embodiment, an installation seat is arranged on the inner wall of the outer cylinder 318, and an installation block is arranged on the support rod. The installation block is adaptively clamped and fixed on the installation seat. The specific fixing method can adopt interference clamping or fixing with screws applied from the side. First, assemble the internal structure, and then install the overall structure into the outer cylinder 318.

[0033] Based on the above structure, this embodiment also provides a method for detecting soil heavy metal pollution, which specifically includes the following steps: Step 1, combine the driving part 2, the detection component 3 and the drill head part 2 into one; connect the driving part 2 to the driving device, and under the drive of the driving device, the driving part 2, the detection component 3 and the drill head part 2 can rotate.

[0034] Step 2, align the drill head part 2 with the detection point, start the driving device, and the drill head part 2 penetrates downward into the soil. According to the scale line preset on the surface of the outer cylinder 318, judge the penetration depth.

[0035] Step 3: When reaching the designated point, drive the drive shaft 301 to rotate through the drive source, so that the upper drive plate and the lower drive plate contract towards the central sleeve 305. Driven by the drive rod 308, the drive seat 307 moves outwards, and the detection probe 312 is pierced into the corresponding soil on the side through the push plate 309. When reaching the designated depth, the drive shaft 301 rotates, driving the upper drive sleeve 304 and the lower drive sleeve to move up and down along the reverse thread section, and then pushing the drive seat 307 and the push plate 309 through the drive rod 308, so that the detection probe 312 is laterally pushed out from the detection port 319 of the outer cylinder 318 and pierced into the soil for detection.

[0036] Step 4: Obtain the detection data of the corresponding soil through the detection probe 312, and upload the detection data to the computer through the wireless module; the detection probe 312 obtains the heavy metal data in the soil and uploads it to the computer for analysis through the wireless module.

[0037] Step 5: After the detection is completed, operate the drive source in reverse to contract the detection probe 312 inward; after the detection is completed, the drive shaft 301 rotates in reverse, the detection probe 312 is retracted, and the device is pulled out of the soil.

[0038] Step 6: Pull out the outer cylinder 318 outward and perform the detection at the next detection point.

[0039] Thus, in this embodiment, the detection probe 312 is arranged in the outer cylinder 318, connected to the drill head 2 through the outer cylinder 318 and the drive part 2, driven by the drive source to drive the drive part 2, the detection component 3 and the drill head 2 to rotate, and the whole is sent underground. According to the preset depth, the drive shaft 301 is driven to rotate, so that the drive seat 307 and the push plate 309 move from the inside to the outside, and the detection probe 312 is inserted into the soil laterally for heavy metal pollution detection. It is applicable to places such as farmland, industrial areas, and mining areas that need to detect soil heavy metal pollution. It provides a high-efficient and accurate soil heavy metal pollution detection tool for researchers, which helps to analyze the pollution distribution and formulate treatment plans.

[0040] Embodiment 2: This embodiment is also provided with a protection plate 314 and an elastic propulsion structure.

[0041] As Figure 6 and Figure 9 shown, in order to prevent soil from entering the device during rotation, this embodiment is provided with a deployment arm 315 at the front end of the drive seat 307, a protection plate 314 is hinged at the detection port 319, and the deployment arm 315 can deploy the protection plate 314 outwards as it advances. A chute 316 is provided at the bottom of the protection plate 314, and the deployment arm 315 is connected in the chute 316 through a slide rod.

[0042] In this embodiment, the push plate 309 and the driving plate are of a separated structure. With this structure, when the driving seat 307 is driven, it will first actuate the protection plate 314 through the deployment arm 315, and the protection plate 314 will move and expand outward during the deployment of the deployment arm 315. This action can push aside the loose soil, avoiding the influence of the mixed soil formed by drilling on the detection. After the pushing aside action is completed, the push plate 309 contacts the driving seat 307, and then the driving shaft 301 pushes the push seat and the detection probe 312 to move laterally, so that the detection probe 312 is inserted into the soil from the side for heavy metal pollution detection at this depth.

[0043] In order for the structures of the push plate 309 and the detection probe 312 to be self-resetting and remain in a certain position, an open inner cavity is provided at the front end of the positioning rod 306. A limiting hole 313 is opened on the side wall of the inner cavity. A fixing plate 311 is fixedly sleeved in the inner cavity. The push plate 309 is slidably sleeved in the inner cavity, and a driving block extends from the limiting hole 313. A spring 310 is provided between the push plate 309 and the fixing plate 311. The spring 310 can keep the push plate 309 at the end position of the limiting hole 313. By the fixing plate 311 receiving the pressure of the spring 310, the detection probe 312 is inserted into the soil laterally in an elastic state, avoiding damage to the detection probe 312 when it encounters hard soil, and also having the function of protecting the detection probe 312.

[0044] Embodiment 3, in this embodiment, multiple groups of detection components 3 are provided.

[0045] As Figure 3 shown, in this embodiment, multiple groups of driving seats 307, detection probes 312 and protection plates 314 are provided. The support rods and the driving seats 307 are alternately arranged inside the outer cylinder 318, so as to form multiple groups of detection components 3 inside the outer cylinder 318. A shaft seat is provided at the bottom of the end outer cylinder 318. The bottom of the driving shaft 301 is rotatably arranged inside the shaft seat, and a connecting head for fixing the drill head 2 is provided at the bottom of the shaft seat. It further includes a connecting component. The connecting component includes a coupling. Corresponding connecting parts are provided at the upper and lower parts of the outer cylinder 318, and the connecting parts are combined and connected to connect the upper and lower sleeves together. The driving shafts 301 are connected by a coupling, so as to form multiple detection components 3 along the axial direction of the outer cylinder 318.

[0046] In this embodiment, through one driving shaft 301, the lateral horizontal left and right translation movements of multiple groups of driving seats 307 can be realized, that is, the lateral insertion actions of multiple groups of detection probes 312 can be realized, realizing the function of multi-depth detection at the same position, and solving the problems of complex operation and incomplete data acquisition in the traditional method.

[0047] The core of this embodiment lies in controlling the lateral protrusion and retraction of the detection probe 312 by the rotation of the drive shaft 301 and the up-and-down movement of the drive sleeve, so as to perform in-situ detection at different depths. This device is easy to operate and has a stable structure, suitable for a variety of soil pollution detection scenarios, providing strong technical support for the research and treatment of soil heavy metal pollution.

[0048] The above-described embodiments of the present invention do not constitute a limitation on the protection scope of the present invention. The basic concept of the present invention is to reduce soil disturbance by laterally protruding the detection probe, enabling soil heavy metal detection at different depths at the same location and avoiding the limitations of the traditional method that requires multi-point distribution. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the claims of the present invention.

Claims

1. A soil heavy metal pollution detection device, characterized in that: The drill head comprises a drill part, a driving part and a detection assembly arranged between the drill head and the driving part; the detection assembly comprises an outer cylinder, a driving shaft, a center sleeve, an upper driving sleeve, a lower driving sleeve, a positioning rod, a driving seat and a detection probe; the upper and lower parts of the outer cylinder are respectively connected to the driving member and the drill head, so that when the driving part is driven by rotation, the outer cylinder transmits power to the drill head; The drive shaft is coaxially rotatably arranged inside the outer cylinder; a drive source for rotating the drive shaft is connected to its upper part; reverse thread segments are arranged at the upper and lower parts of the drive shaft, and the upper drive sleeve and the lower drive sleeve are correspondingly threadedly connected to the two reverse thread segments; The central sleeve is fixed to the center of the outer cylinder via a support rod, and the center thereof is rotatably matched with the driving shaft; The positioning rod is fixed on the center sleeve along the radial direction of the outer cylinder; the driving seat is slidably sleeved on the positioning rod, and the upper and lower parts of the driving seat are connected to the upper driving sleeve and the lower driving sleeve through the driving rods hinged at both ends; the outer cylinder is provided with a detection port, The front end of the positioning rod is slidably sleeved with a push plate, on which a detection probe corresponding to the detection port is fixed, and the driving seat can drive the push plate forward to push the detection probe out of the detection port.

2. The soil heavy metal pollution detection device according to claim 1, characterized in that: The driving seat, the detection probe and the protection plate are arranged in multiple groups, and the support rods and the driving seat are alternately arranged in the outer cylinder, so that multiple groups of detection components are formed in the outer cylinder.

3. The soil heavy metal pollution detection device according to claim 1, characterized in that: It also includes a connecting component, which includes a coupling. Corresponding connecting parts are arranged on the upper and lower parts of the outer cylinder. The connecting parts are combined and connected to connect the upper and lower sleeves together. The driving shafts are connected through the coupling, thereby forming multiple detection components along the axial direction of the outer cylinder.

4. The soil heavy metal pollution detection device according to claim 2 or 3, characterized in that: A shaft seat is arranged at the bottom of the terminal outer cylinder, the bottom of the driving shaft is rotatably arranged in the shaft seat, and a connecting head for fixing the drill head is arranged at the bottom of the shaft seat.

5. The soil heavy metal pollution detection device according to claim 1, characterized in that: The front end of the positioning rod is provided with an open inner cavity, the side wall of the inner cavity is provided with a limiting hole, a fixing plate is fixedly mounted in the inner cavity, a push plate is slidably mounted in the inner cavity, a driving block extends from the limiting hole, and a spring is arranged between the push plate and the fixing plate.

6. The soil heavy metal pollution detection device according to claim 1, characterized in that: A mounting seat is arranged on the inner wall of the outer cylinder, a mounting block is arranged on the support rod, and the mounting block is mounted on the mounting seat through an adapter card and fixed.

7. The soil heavy metal pollution detection device according to claim 1, characterized in that: The front end of the driving seat is provided with an unfolding arm, and a protective plate is hinged at the detection port. The unfolding arm can unfold the protective plate outwards as it is pushed forward.

8. The soil heavy metal pollution detection device according to claim 1, characterized in that: A slide groove is arranged at the bottom of the protective plate, and the unfolding arm is connected in the slide groove via a slide rod.

9. The soil heavy metal pollution detection device according to claim 1, characterized in that: The driving source is a motor, and a motor compartment is arranged on the upper part of the outer cylinder, and a battery is arranged inside the motor compartment.

10. A soil heavy metal pollution detection method, using the soil heavy metal pollution detection device according to claim 1, characterized in that: Step 1: Combine the driving part, the detection component and the drill head into one; connect the driving part to the driving device, and the driving part, the detection component and the drill head can rotate under the driving of the driving device; Step 2: Align the drill head with the detection point, start the driving device, and let the drill head go deep into the soil. The drilling depth is determined according to the scale lines preset on the surface of the outer cylinder. Step 3: When the designated point is reached, the driving source drives the driving shaft to rotate, thereby causing the upper driving plate and the lower driving plate to retract toward the center sleeve. Driven by the driving rod, the driving seat moves outward, and the detection probe is inserted into the soil corresponding to the side through the push plate; Step 4: Acquire the detection data of the corresponding soil through the detection probe, and upload the detection data to the computer through the wireless module; Step 5: After the detection is completed, operate the driving source in the reverse direction to retract the detection probe inward; Step 6: Pull out the outer tube and proceed to the next test point.

Images