Soil micropollutant enrichment device

Abstract

The embodiment of the invention provides a soil micro-pollutant enrichment device. The soil micro-pollutant enrichment device comprises a soil drilling mechanism, at least the lower portion of the columnar shell is open, and the soil drilling mechanism is arranged on the lower side of the columnar shell and comprises a power device and a rotary scraping plough. The rotary scraping plough comprises a central connecting body and a plurality of coulters; the central connector is connected with an output shaft of the power device; the coulters are connected with the central connector, are uniformly distributed in the circumferential direction and converge at the central position to form a pointed end; each coulter uniformly comprises a main cutter part; the main cutter part comprises a first front cutter surface which is obliquely arranged relative to a coulter rotating shaft, and a first rear cutter surface which is positioned at the bottom end of the coulter and is close to the first front cutter surface; when the power device drives the rotary scraping plough to rotate in the forward direction, a cutting edge formed by approaching the first front cutter face and the first rear cutter face scrapes and ploughs a soil layer on the lower side, and the scraped and ploughed soil enters the columnar containing cavity under the oblique pushing effect of the first front cutter face. And the cross section projection plane of the cylindrical shell is positioned in a rotary scraping working plane formed when the rotary scraping plough rotates.

Description

Technical Field

[0001] This disclosure relates to the field of soil pollution monitoring technology, specifically to a soil trace pollutant enrichment device. Background Technology

[0002] New pollutants are those that are clearly generated by production and daily life, but for which there are no laws, regulations, or standards that define them or that define them incompletely, yet which endanger the ecological environment and human health. Currently, more than 20 major categories of new pollutants have been discovered and verified, with antibiotics being a typical example.

[0003] Taking antibiotics as an example, 90% of them, after being used by humans and animals, are excreted into the surrounding environment in the form of raw materials or metabolites through feces and urine. They then enter the soil through dry and wet deposition, sewage irrigation, and other means, migrating laterally and vertically into surface water, deep soil, and even groundwater. Sampling surveys have revealed the presence of antibiotic components in invertebrates, plant roots, and stems and leaves surviving in the soil of many regions, confirming that soil is an important "sink" and "source" of antibiotics in the ecological environment. Monitoring the characteristics of new pollutants such as antibiotics in soil has been listed as an important task in soil pollutant monitoring.

[0004] Because the concentrations of new pollutants such as antibiotics in soil are generally low, typically at the μg / L or ng / L level, current methods for detecting and determining the concentrations of these pollutants in soil require collecting large amounts of soil samples and using organic reagents to extract and concentrate them into a concentrated solvent before they can meet the requirements of sophisticated instrumental analysis. This approach is not suitable for routine, large-scale monitoring applications. Summary of the Invention

[0005] This disclosure provides a soil trace pollutant enrichment device, including a cylindrical shell, a pollutant enrichment component, and a soil drilling mechanism; The cylindrical shell forms a cylindrical cavity for holding the soil sample; the lower part of the cylindrical cavity is open; The contaminant enrichment component is horizontally disposed at the bottom of the inner side of the cylindrical cavity, and includes a contaminant enrichment membrane; The soil drilling mechanism is located on the lower side of the cylindrical shell and includes a power unit and a rotary scraper. The rotary scraper includes a central connecting body and multiple scraper blades. The central connecting body is connected to the output shaft of the power unit. Each of the scraper blades is connected to the central connecting body, is evenly distributed in the circumferential direction, and converges at the center to form a pointed tip. Each of the plow blades is evenly distributed and includes a main blade section; the main blade section includes a first front blade surface that is inclined relative to the plow blade's rotation axis, and a first rear blade surface located at the bottom of the plow blade and close to the first front blade surface; when the power device drives the rotary plow to rotate in the forward direction, the cutting edge formed by the first front blade surface and the first rear blade surface scrapes the soil layer below, and the soil scraped up enters the cylindrical cavity through the oblique pushing action of the first front blade surface; The cross-sectional projection surface of the cylindrical shell is located within the swirl working surface formed when the rotary scraper rotates.

[0006] Optionally, each of the plow blades includes a secondary blade located on the outer periphery of the main blade; the secondary blade is located on the first front blade side and includes an inner blade facing the inner side of the circumference and an outer blade facing the outer side of the circumference. The junction of the inner and outer cutting surfaces forms a vertical cutting edge that cuts the lower soil layer in the vertical direction when the rotary scraper rotates in the forward direction.

[0007] Optionally, the cylindrical shell is a cylindrical shell; when the rotary scraper rotates, the circle formed on the outermost periphery of the secondary blade coincides with the orthographic projection edge of the cylindrical shell.

[0008] Optionally, a soil bearing plate with drainage holes on its surface is provided inside the cylindrical shell; The soil bearing plate is connected to the cylindrical shell, and there is a clearance area between the soil bearing plate and the cylindrical shell; The first front blade is configured to cause the soil scraped up by the rotary scraper to move from the center region to the edge region along the first front blade as the rotary scraper rotates in the positive direction, and to enter the cylindrical cavity through the empty area.

[0009] Optionally, the main blade includes a second front blade disposed opposite to the first front blade, and a second rear blade located at the top of the plow blade and close to the second front blade; When the power device drives the rotary scraper to rotate in the opposite direction, the cutting edge formed by the cooperation of the second front blade and the second rear blade scrapes the soil on the upper side, and the soil formed by scraping moves to the lower side under the oblique pushing action of the second front blade.

[0010] Optionally, the cylindrical shell includes at least two separate shells; of the at least two separate shells, the first shell is fitted inside the second shell, and the first shell and the second shell are connected by a first axial telescopic device; when the first axial telescopic device is activated, it causes the first shell and the second shell to move relative to each other in the axial direction, thereby increasing or decreasing the volume of the cylindrical cavity; The contaminant enrichment component is connected to the bottom shell of the at least two separate shells; or, the contaminant enrichment component is disposed in the cylindrical cavity via a second axial telescopic device, and the second axial telescopic device is connected to the top shell of the at least two separate shells.

[0011] Optionally, the first axial telescopic device further includes a detection device for determining the degree of overlap between the at least two separate housings; or, The cylindrical shell has a distance monitoring device inside to monitor its distance relative to a reference object; one of the distance monitoring device and the reference object is disposed on the bottom shell of the at least two separate shells, and the other is disposed on the top shell of the at least two separate shells.

[0012] Optionally, a breaking tooth is also provided at the scraper blade edge where the first front blade and the first rear blade meet.

[0013] Optionally, the contaminant enrichment membrane is a sulfonated styrene-vinylbenzene copolymer membrane or a polydimethylsiloxane membrane.

[0014] Optionally, the contamination enrichment also includes an upper protective plate and a lower protective plate with holes on their surfaces; The pollutant enrichment membrane is disposed between the upper protective plate and the lower protective plate.

[0015] The soil trace pollutant enrichment device provided in this embodiment uses a drilling mechanism to fill a cylindrical cavity with soil and cover it with a pollutant enrichment component. Accordingly, by maintaining the soil trace pollutant enrichment device in the aforementioned state, the gradual accumulation of trace pollutants in the soil can be achieved. Because the enrichment device is directly located in the soil, the solution of this embodiment can directly collect the accumulation and diffusion of trace pollutants in the soil caused by dry and wet deposition, sewage irrigation, rainfall, etc., thereby achieving the accumulation of pollutants under natural conditions. Attached Figure Description

[0016] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure.

[0017] To more clearly illustrate the technical solutions in the embodiments of this disclosure or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, those skilled in the art can obtain other drawings based on these drawings without any creative effort, wherein: Figure 1 This is an overall view of the soil trace pollutant enrichment device provided in a preferred embodiment of the present invention; Figure 2 This is a side view of the soil trace pollutant enrichment device provided in a preferred embodiment of the present invention; Figure 3 This is a schematic diagram of the interior of the cylindrical shell of the soil trace pollutant enrichment device provided in a preferred embodiment of the present invention after it has been cut open. Figure 4 This is a cross-sectional view of the plow blade of the soil trace pollutant enrichment device provided in a preferred embodiment of the present invention.

[0018] Wherein: 11-cylindrical shell, 111-slide rail, 112-installation part, 12-contamination enrichment component, 13-soil drilling mechanism, 131-power unit, 132-rotary scraper, 133-plow blade, 134-first rear blade face. Detailed Implementation

[0019] Embodiments of this disclosure will now be described in more detail with reference to the accompanying drawings. While some embodiments of this disclosure are shown in the drawings, it should be understood that this disclosure can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of this disclosure. It should be understood that the accompanying drawings and embodiments of this disclosure are for illustrative purposes only and are not intended to limit the scope of protection of this disclosure.

[0020] The term "comprising" and its variations as used herein are open-ended inclusion, meaning "including but not limited to". The term "based on" means "at least partially based on". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments". Definitions of other terms will be given in the description below. In this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations.

[0021] This disclosure provides a convenient soil trace pollutant enrichment device. The soil trace pollutant enrichment device provided in this disclosure is deployed long-term in soil plots within the area requiring monitoring. The pollutant enrichment component 12 within the device enriches the trace pollutants to be monitored in the soil. Subsequent extraction of the trace pollutants is achieved simply by using an organic solvent to extract the pollutant from the enrichment component 12.

[0022] Figure 1 This is a schematic diagram of the appearance of the soil trace pollutant enrichment device provided in the embodiments of this disclosure. Figure 2 This is a schematic diagram of a longitudinal section of a soil trace pollutant enrichment device that has been privately provided in this publication. (For example...) Figure 1 and Figure 2As shown, the soil trace pollutant enrichment device provided in this embodiment includes a cylindrical shell 11, a pollutant enrichment component 12, and a soil drilling mechanism 13.

[0023] The cylindrical shell 11 has an opening at least at the bottom, forming a cylindrical cavity for holding the soil sample. In specific implementations, to allow the soil sample inside the cylindrical cavity to communicate with the external soil and achieve sufficient diffusion and exchange of various substances, permeable holes can also be provided on the shell of the cylindrical shell 11. The permeable holes can allow not only liquid water to pass through, but also fine particulate matter and other substances to pass through.

[0024] Preferably, the upper end of the cylindrical shell is provided with an opening that can be opened and closed, for disassembling, cleaning and maintaining the internal components of the cylindrical shell 11 when not in operation.

[0025] The contaminant enrichment component 12 is a structure specifically designed for the enrichment of trace contaminants. The contaminant enrichment component 12 is disposed generally horizontally within a cylindrical cavity and includes a contaminant enrichment membrane for enriching trace contaminants. It is readily understood that the type of contaminant enrichment membrane can be determined based on the type of trace contaminant to be enriched and the type of contaminants expected in the area. In the case of a hydrophilic organic pollutant (e.g., a hydrophilic antibiotic), the contaminant enrichment membrane can be a sulfonated styrene-vinylbenzene copolymer membrane; in the case of a hydrophobic organic pollutant (e.g., a hydrophobic antibiotic), the contaminant enrichment membrane can be a polydimethylsiloxane membrane. To achieve the enrichment of contaminants with both of these characteristics, contaminant enrichment membranes of the corresponding types can also be used simultaneously.

[0026] In practical implementation, to protect the pollutant enrichment membrane and prevent damage due to external impacts, the pollutant enrichment component 12 may further include an upper protective plate and a lower protective plate. Both the upper and lower protective plates have openings on their surfaces; these openings, as mentioned earlier, are permeable holes that allow water flow and small particles to pass through. The upper and lower protective plates can be connected via a snap-fit ​​structure or other condensation structure. The aforementioned pollutant enrichment membrane is positioned between the upper and lower protective plates.

[0027] In practical applications, to prevent the contaminant enrichment component from vibrating or tilting due to external impacts when filling the cylindrical cavity with soil samples, and to facilitate easy placement and removal of the contaminant enrichment component 12, a detachable structure can be used to securely connect the cylindrical shell 11 of the contaminant enrichment component 12 or other directly connected components. For example, a threaded structure can be provided on the contaminant enrichment component 12 to achieve a secure connection between the contaminant enrichment component 12 and corresponding components.

[0028] Furthermore, in this embodiment, a plurality of slide rails 111 are provided inside the cylindrical cavity. The plurality of slide rails 111 are symmetrically arranged along the geometric center of the cylindrical shell and are used to adjust the installation position of the contaminant enrichment component 12. In this preferred embodiment, the slide rail 111 group consists of two slide rails 111 symmetrically arranged at the geometric center to adjust the installation position of the contaminant enrichment component 12. In some other embodiments, such as in application scenarios with more resilient soil, multiple slide rail 111 groups can also be provided to make the installation of the contaminant enrichment component 12 more stable. A plurality of mounting parts 112 are provided at multiple height positions of the slide rail 111 group for fixing the contaminant enrichment component 12 with adjusted position on the slide rail 111 group.

[0029] In this embodiment, by setting the slide rail 111 and the mounting part 112, the pollution enrichment component 12 can be detached and securely installed, and the installation position is adjustable. The installation position of the pollution enrichment component 12 can be adjusted according to the actual use scenario.

[0030] It should be noted that the contaminant enrichment component 12 is provided with a mounting bracket that is compatible with the mounting part 112 on the slide rail 111, for mounting the contaminant enrichment membrane of the contaminant enrichment component 12, as well as the upper protective plate and the lower protective plate, on the column-shaped shell slide rail 111.

[0031] The soil-drilling mechanism 13 is a device that enables the entire enrichment device (specifically, the cylindrical shell 11 within the enrichment device) to be inserted into the soil and to fill the soil sample with the excavated soil. The name "soil-drilling mechanism 13" is used here for descriptive purposes, specifically to illustrate how it resembles an insect rapidly digging a hole and burrowing into the soil layer.

[0032] As shown in the figure, the soil drilling mechanism 13 is located on the lower side of the cylindrical shell 11. The statement that the soil drilling mechanism 13 is located on the lower side of the cylindrical shell 11 should be interpreted broadly. It can be that it is entirely located on the lower side of the cylindrical shell 11, or it can be partially located on the lower side of the cylindrical shell 11 and partially located within the cylindrical cavity formed by the cylindrical shell 11.

[0033] The soil drilling mechanism 13 includes a power unit 131 and a rotary scraper 132. The power unit 131 drives the rotary scraper 132 to rotate, realizing the scraping operation of the soil layer. Specifically, the rotary scraper includes a central connecting body and multiple scraper blades 133. The central connecting body is directly connected to the output shaft of the power unit 131. Each scraper blade 133 is connected to the central connecting body and is evenly distributed in the circumferential direction, converging at the center to form a pointed tip. The fact that the scraper blades 133 can converge at the center to form a pointed tip ensures that the soil layer located below the center position can be broken up by the rotation of the drill bit, thereby allowing the scraper blades 133 to break up and plow up the soil in this area, avoiding the problem that the entire contamination enrichment component 12 cannot penetrate into the soil layer because the soil layer in the center area cannot be scraped.

[0034] It should be noted that a certain distance is left between the rotary scraper and the cylindrical shell so that when the rotary scraper 132 scrapes the soil layer, the scraped soil layer can fall into the space between the rotary scraper and the cylindrical shell, and enter the interior of the cylindrical cavity through the lower opening of the cylindrical shell, so that it can be enriched by the pollutant enrichment component 12.

[0035] Specifically, when enough soil enters the space between the rotating scraper and the cylindrical shell, under the influence of pressure, the soil will come into contact with the pollutant enrichment component, and through the permeable holes on the lower protective plate, small particles and water flow will enter and contact the enrichment membrane, thus realizing the enrichment process of pollutants.

[0036] In this embodiment, the pollutant enrichment component is a disc assembly whose outer contour fits against the inner wall of the cylindrical shell. In some other embodiments, the outer contour of the pollutant enrichment component, when not installed on the slide rail, can have space between it and the inner wall of the cylindrical shell, such as using a prismatic disc assembly. This arrangement allows sufficient soil to enter the space between the rotating scraper and the cylindrical shell. Under pressure, some soil will contact the pollutant enrichment component from bottom to top, while another portion of the soil to be enriched will enter the upper space of the pollutant enrichment component through the space between the component and the inner wall of the cylindrical shell, and be supported by the upper protective plate. The soil to be enriched entering the upper space of the component will be enriched simultaneously through the permeable holes on the upper protective plate. This arrangement allows the enrichment component to enrich simultaneously from top to bottom, optimizing the enrichment effect.

[0037] In this embodiment, the power unit 131 is a drive motor, which is located between the cylindrical shell and the rotary scraper. The bottom opening of the cylindrical shell has a mounting bracket for mounting the drive motor. The mounting bracket can be made of a lightweight metal material, such as aluminum alloy. The aluminum alloy connector is fixedly connected to the inner wall of the lower opening of the cylindrical shell. The fixed connection method is welding or slot fitting to ensure that the mounting bracket and the drive motor can remain stable under the influence of pressure during the drilling process. The aluminum alloy has a relatively narrow width, which will not affect the entry of the soil to be sampled into the lower opening of the cylindrical shell. The mounting bracket has a groove in the center for mounting the drive motor, so as to drive the rotary scraper installed below the opening of the cylindrical shell.

[0038] It should be noted that the connection method of the power unit can also be different, such as being directly installed on the inner wall of the cylindrical shell, which is a common technical means in this field and will not be elaborated here.

[0039] Preferably, the drive motor is fitted with a protective shell to prevent soil scraped up during the drilling process from falling into the space between the rotating scraper and the cylindrical shell and interfering with the normal operation of the drive motor.

[0040] In this embodiment, each plow blade 133 includes a main blade section. The main blade section is the main structural part used to scrape and plow the soil layer, and it is formed by the main body of the plow blade 133. It includes a first front blade surface inclinedly disposed on the main body of the plow blade 133, and a first rear blade surface 134 located at the bottom end of the plow blade 133 and close to the first front blade surface. The first front blade surface and the first rear blade surface 134 directly cooperate to form a cutting edge for scraping and plowing the soil layer. When the power device 131 drives the rotary plow 132 to rotate in the forward direction, the cutting edge formed by the first front blade surface and the first rear blade surface 134 scrapes and plows the lower soil layer.

[0041] In this embodiment, due to the soil's viscosity and the squeezing force of the rotating scraper itself, and because the first front cutting surface is a curved cutting surface used for drill bits, the soil scraped up by the plow blade 133 will adhere to the first front cutting surface. The first front cutting surface is inclined. During the operation of the rotating scraper, the soil adsorbed on the first front cutting surface will be obliquely pushed from bottom to top by the rotation of the first front cutting surface and enter the space between the rotating scraper and the cylindrical shell. It will then enter the cylindrical cavity through the lower opening of the cylindrical shell, allowing it to be enriched by the contaminant enrichment component 12.

[0042] It is easy to understand that, since the shape and width of the soil pores formed by the drilling should be consistent with the rotary scraper 132, the soil scraped up will overflow from the joint between the rotary scraper 132 and the soil pores under the downward pressure of the enrichment device. Since the shape and width of the soil pores formed by the drilling are consistent with the rotary scraper, and the cross-sectional projection of the cylindrical shell is located within the rotary scraping working surface formed when the rotary scraper rotates, the scraped soil will enter the space between the rotary scraper 132 and the cylindrical shell, and enter the cylindrical cavity through the lower opening of the cylindrical shell, so that it can be enriched by the pollutant enrichment component 12. Correspondingly, the first rear blade 134 adheres to and presses against the soil surface that has been scraped, and continues to scrape the surface of the subsequent soil layer.

[0043] In this embodiment, the cross-sectional projection plane of the cylindrical shell 11 is located within the rotary scraping working surface formed when the rotary scraper 132 rotates. It is conceivable that, since the cross-sectional projection plane of the cylindrical shell 11 is located within the rotary scraping working surface formed when the rotary scraper 132 rotates, after the rotary scraper 132 lifts and loosens the soil layer, the enrichment device will inevitably sink into the lower soil layer under the action of gravity, causing part of the enrichment device to gradually penetrate into the soil layer.

[0044] As analyzed above, during the drilling process of the soil trace pollutant enrichment device into the soil layer, since its outer periphery is not restricted by the cylindrical surface of the scraper (or tillage), the soil that is scraped up mostly enters the cylindrical cavity under the inclined pushing action of the first front cutting surface, thus filling the cylindrical cavity. Because the pollutant enrichment component 12 is horizontally set at the bottom of the cylindrical cavity, as the soil fills the cylindrical cavity, it is pushed and piled up to the top of the pollutant enrichment component 12, achieving the goal of burying the pollutant enrichment component 12 in the soil. In addition, since the aforementioned pushing and piling process generally maintains the upper soil layer on top and the lower soil layer on the bottom, it can maintain the original soil depth distribution and will not change the distribution of trace pollutants in the soil in the depth direction.

[0045] As analyzed above, the soil trace pollutant enrichment device provided in this embodiment fills the cylindrical cavity with soil through the drilling mechanism 13 and covers it with the pollutant enrichment component 12. Accordingly, by maintaining the soil trace pollutant enrichment device in the aforementioned state, the gradual accumulation of trace pollutants in the soil can be achieved. Because the enrichment device is directly in the soil, this embodiment can directly collect the accumulation and diffusion of trace pollutants in the soil caused by dry and wet deposition, sewage irrigation, rainfall, etc., thus achieving pollutant accumulation under natural conditions. After a certain period of accumulation of trace pollutants, the enrichment device can be removed from the soil layer, and the pollutant enrichment membrane can be extracted. Subsequently, by extracting trace pollutants from the pollutant enrichment membrane, an extraction solvent containing trace pollutants can be obtained for subsequent pollutant data determination.

[0046] In some specific application scenarios disclosed herein, the soil to be drilled may be relatively loose soil layers such as farmland. During the drilling process, because the soil layer is relatively loose, the soil layer that is scraped can spread to the surrounding area and cannot be guided into the columnar cavity.

[0047] To address the aforementioned issues, in some embodiments of this disclosure, each plow blade 133, in addition to a main blade, may also include a secondary blade located on the outer periphery of the main blade. The secondary blade is entirely located on the side of the main blade facing the first front blade surface, and includes an inner blade facing the inner circumference and an outer blade facing the outer circumference. The boundary between the inner and outer blades forms a vertical cutting edge. When the rotary plow 132 rotates forward, the vertical cutting edge scrapes the lower soil layer vertically, and the inner blade surface forms a circumferential limit, preventing the scraped soil from spreading outwards, instead moving into the cylindrical cavity along with the first front blade surface.

[0048] like Figure 1 and Figure 2As shown, preferably, the cylindrical shell 11 is a cylindrical shell 11, with the outermost periphery of the secondary blade coplanar with the outer surface of the cylindrical shell 11. Correspondingly, when the rotary scraper 132 rotates, the circle formed by the outermost periphery of the secondary blade coincides with the orthographic projection of the cylindrical shell 11. In this way, the enrichment device can be settled in the soil layer while maintaining a minimum volume of soil being rotary tilled, minimizing the volume of disturbed soil and reducing the load on the power unit 131. In addition, the secondary blade acts as a protective layer, ensuring the structural stability of the soil layer around the enrichment device. This also minimizes the risk of water leakage caused by artificial isolation between the soil inside and outside the soil enrichment device, thus avoiding the problem of not being able to simulate real-world conditions due to water leakage (it should be noted that in most applications, the cylindrical shell 11 has permeable holes, which are precisely what allows for communication between the internal and external soil).

[0049] The soil trace pollutant enrichment device provided in this embodiment can only achieve settling into the soil layer under its own gravity and with the scraping action of the rotary scraper 132. When the soil trace pollutant enrichment device itself is relatively light, as the settling depth increases, the compactness of the soil layer decreases, and the subsequent settling rate will gradually decrease or even become unable to continue settling.

[0050] To address the issues at the beginning, it is necessary to increase the downward force applied to the rotary scraper 132. In some embodiments of this disclosure, a soil bearing plate with perforated surfaces is provided inside the cylindrical shell 11 and located below the pollutant enrichment membrane. The soil bearing plate is connected to the cylindrical shell 11, and there is a clearance area between them. The first front blade is configured to move the soil scraped along the first front blade from the center area to the edge area when the rotary scraper 132 rotates in the forward direction. By allowing the clearance area to enter the cylindrical cavity and press against the soil bearing plate, the gravity applied to the rotary scraper 132 by the entire enrichment device is increased, thereby enabling the rotary scraper 132 to better scrape the lower soil layer, that is, to achieve better settling of the entire device.

[0051] In some other embodiments, the enrichment device may also be equipped with a power-accumulating impact device, which periodically increases the downward pressure to achieve better settling of the rotary scraper 132.

[0052] The soil trace pollutant enrichment device with the aforementioned structure fills the cylindrical cavity with scraped soil. However, the aforementioned structure cannot achieve soil discharge from the cylindrical cavity. To achieve soil discharge from the cylindrical cavity, in some embodiments, the main blade also includes a second front blade facing away from the first front blade, and a second rear blade facing located at the top of the plow blade 133 and close to the second front blade. When the power device 131 drives the rotary plow 132 to rotate in the opposite direction, the cutting edge formed by the second front blade and the second rear blade facing scrapes the upper soil layer, and the soil formed by the scraping moves downward under the oblique pushing action of the second front blade. As analyzed above, by gradually pushing the soil downward through the reverse action of the rotary plow 132, soil discharge from the cylindrical cavity can be achieved.

[0053] In practical applications, after long-term rain erosion and the binding forces between soil components, the soil inside the columnar cavity may form a relatively stable structure. To disrupt this stable structure, the columnar shell 11 can also be equipped with the aforementioned energy-accumulating impact device or a similar vibration device. The impact vibration can then disrupt the overall structure of the soil inside the columnar cavity, allowing for better removal of the soil from the columnar cavity via the rotating scraper 132.

[0054] In practical applications of trace pollutant enrichment, it is necessary to monitor characteristic data of soil pollutants at different depths as required. Setting up separate cylindrical shells 11 for each depth would result in significant waste. To address this issue, in some other embodiments, the cylindrical shell 11 is configured to include at least two separate shells. For example, in one specific application, it is configured to include three separate shells. In the aforementioned at least two separate shells, the first shell is fitted inside the second shell, and the first and second shells are connected by a first axial telescopic device. The operation of the first axial telescopic device enables relative movement of the first and second shells in the axial direction, thereby increasing or decreasing the volume of the cylindrical cavity. In specific implementations, the first axial telescopic device can be an electric or hydraulic telescopic rod, or a push rod formed by a linkage structure. This disclosure does not impose specific limitations; for specific structures, please refer to mechanical structure design documents.

[0055] Accordingly, in some embodiments, the contaminant enrichment component 12 is connected to the bottom shell of the aforementioned plurality of split shells, so that the contaminant enrichment component is located in the bottom shell and can directly contact the soil for enrichment operations. In other embodiments, the contaminant enrichment component 12 is disposed within the cylindrical cavity via a second axial telescopic device, which is directly connected to the top shell of at least two split shells, or connected to the upper structure of the top shell. Through the action of the second axial telescopic device, the contaminant enrichment component 12 can be moved to the bottom of the cylindrical cavity after the volume of the cylindrical cavity expands.

[0056] This configuration allows for changes in the available depth and load-bearing capacity of the pollutant enrichment components, facilitating adaptive adjustments of the pollutant enrichment device to different soil conditions.

[0057] Through specific analysis, in some embodiments, the pollution enrichment component 12 (in which it includes an upper protective plate and a lower protective plate) is used as a soil bearing plate, and no separate soil bearing plate is set up.

[0058] As analyzed above, in specific applications, the landfill depth of the pollutant enrichment membrane needs to be determined according to requirements. Accordingly, in some embodiments, a detection device is also required to detect the degree of overlap between the shells.

[0059] In some embodiments, the detection device may be a device for measuring the number of rotations of the drive motor for the first drive device or a corresponding parameter (e.g., a resistance sensor or a capacitance sensor related to the degree of overlap).

[0060] In some other embodiments, where the contaminant enrichment component 12 is directly connected to the bottom shell, a distance monitoring device can also be installed inside the cylindrical shell 11 to monitor its distance relative to a reference object. One of the distance monitoring device and the reference object is located on the bottom shell of the sub-shell, and the other is located on the top shell of the sub-shell. In specific implementations, the distance monitoring device and the reference object largely overlap in the orthographic projection direction.

[0061] The first front cutting face and the first junction mentioned above form the cutting edge of the scraper. In practical applications, when the soil layer is relatively dense, the cutting edge cannot achieve a good scraping effect. To solve this problem, some embodiments can also provide breaking teeth at the scraper cutting edge. The breaking teeth are set at an inclined downward angle and can be inserted into the soil layer. When the power device 131 drives the rotary scraper 132 to rotate, the breaking teeth break the surface layer of the soil, thereby facilitating better scraping by the cutting edge.

[0062] In practical implementation, in addition to the aforementioned structure, the soil trace pollutant enrichment device may also include other components that work in conjunction with the aforementioned structure to achieve the corresponding functions. For example, it may include an energy storage battery for storing electrical energy, solar panels to ensure that the device remains charged during long-term field operation, an electronic control circuit board for controlling and monitoring the status of various components, and communication components for communicating with a remote data terminal, etc.

[0063] Specifically, the preferred embodiment of the present invention achieves pollutant enrichment as follows: The enrichment device is inserted into the soil, and the opening at the top of the cylindrical shell is closed. The drive device is activated, causing the rotary scraper to begin drilling and creating holes in the soil. Under the influence of gravity, the enrichment device slowly sinks downwards. During this process, the energy storage impact device is activated, periodically increasing the downward pressure to achieve better settling of the rotary scraper 132. The rotary scraper includes an inclined first front cutter face and a first rear cutter face 134 adjacent to it. The first front cutter face and the first rear cutter face 134 directly cooperate to form the cutting edge for scraping the soil layer. When the power unit 131 drives the rotary scraper 132 to rotate in the forward direction, the cutting edges formed by the first front cutting edge and the first rear cutting edge 134 scrape the soil layer below. Due to the soil viscosity and the squeezing gravity of the rotary scraper itself, and because the first front cutting edge is a curved cutting edge used for drill bits, the soil scraped up by the scraper blade 133 will adhere to the first front cutting edge. The first front cutting edge is inclined. During the operation of the rotary scraper, the soil adsorbed on the first front cutting edge will be pushed obliquely from bottom to top by the rotation of the first front cutting edge and enter the space between the rotary scraper and the cylindrical shell. It will then enter the cylindrical cavity through the lower opening of the cylindrical shell, so that it can be enriched by the pollutant enrichment component 12. The first rear cutting edge 134 adheres to and presses against the surface of the soil that has been scraped, and continues to scrape the surface of the subsequent soil layer.

[0064] After the soil enters the columnar shell, it accumulates and presses against the lower protective shell. Water and small particles in the soil pass through the lower protective plate and come into contact with the enrichment membrane, thus achieving the enrichment of trace pollutants.

[0065] The above are merely specific embodiments of this disclosure, enabling those skilled in the art to understand or implement this disclosure. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this disclosure. Therefore, this disclosure is not to be limited to the embodiments described herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A soil trace pollutant enrichment device, characterized in that, Includes cylindrical shell, contaminant enrichment components, and drilling mechanism; The cylindrical shell forms a cylindrical cavity for holding the soil sample; the lower part of the cylindrical cavity is open; The contaminant enrichment component is horizontally disposed at the bottom of the inner side of the cylindrical cavity, and includes a contaminant enrichment membrane; The soil drilling mechanism is located on the lower side of the cylindrical shell and includes a power unit and a rotary scraper. The rotary scraper includes a central connecting body and multiple scraper blades. The central connecting body is connected to the output shaft of the power unit. Each of the scraper blades is connected to the central connecting body, is evenly distributed in the circumferential direction, and converges at the center to form a pointed tip. Each of the plow blades is evenly distributed and includes a main blade section; the main blade section includes a first front blade surface that is inclined relative to the plow blade's rotation axis, and a first rear blade surface located at the bottom of the plow blade and close to the first front blade surface; when the power device drives the rotary plow to rotate in the forward direction, the cutting edge formed by the first front blade surface and the first rear blade surface scrapes the soil layer below, and the soil scraped up enters the cylindrical cavity through the oblique pushing action of the first front blade surface; The cross-sectional projection surface of the cylindrical shell is located within the swirl working surface formed when the rotary scraper rotates.

2. The apparatus according to claim 1, characterized in that: Each of the plow blades includes a secondary blade located on the outer periphery of the main blade; the secondary blade is located on the side of the first front blade face and includes an inner blade face facing the inner side of the circumference and an outer blade face facing the outer side of the circumference; The junction of the inner and outer cutting surfaces forms a vertical cutting edge that cuts the lower soil layer in the vertical direction when the rotary scraper rotates in the forward direction.

3. The apparatus according to claim 2, characterized in that, The cylindrical shell is a round shell; When the rotary scraper rotates, the circle formed on the outermost periphery of the secondary blade coincides with the orthographic projection edge of the cylindrical shell.

4. The apparatus according to claim 1, characterized in that: The cylindrical shell is equipped with a soil bearing plate with drainage holes on its surface; The soil bearing plate is connected to the cylindrical shell, and there is a clearance area between the soil bearing plate and the cylindrical shell; The first front blade is configured to cause the soil scraped up by the rotary scraper to move from the center region to the edge region along the first front blade as the rotary scraper rotates in the positive direction, and to enter the cylindrical cavity through the empty area.

5. The apparatus according to any one of claims 1-4, characterized in that: The main blade includes a second front blade that is disposed opposite to the first front blade, and a second rear blade that is located at the top of the plow blade and close to the second front blade. When the power device drives the rotary scraper to rotate in the opposite direction, the cutting edge formed by the cooperation of the second front blade and the second rear blade scrapes the soil on the upper side, and the soil formed by scraping moves to the lower side under the oblique pushing action of the second front blade.

6. The apparatus according to any one of claims 1-4, characterized in that: The cylindrical shell includes at least two separate shells; of the at least two separate shells, the first shell is fitted inside the second shell, and the first shell and the second shell are connected by a first axial telescopic device; when the first axial telescopic device is activated, it causes the first shell and the second shell to move relative to each other in the axial direction, thereby increasing or decreasing the volume of the cylindrical cavity; The contaminant enrichment component is connected to the bottom shell of the at least two separate shells; or, the contaminant enrichment component is disposed in the cylindrical cavity via a second axial telescopic device, and the second axial telescopic device is connected to the top shell of the at least two separate shells.

7. The apparatus according to claim 6, characterized in that: The first axial telescopic device further includes a detection device for determining the degree of overlap between the at least two separate housings; or, The cylindrical shell has a distance monitoring device inside to monitor its distance relative to a reference object; one of the distance monitoring device and the reference object is disposed on the bottom shell of the at least two separate shells, and the other is disposed on the top shell of the at least two separate shells.

8. The apparatus according to any one of claims 1-4, characterized in that: A breaking tooth is also provided at the scraper blade edge where the first front blade and the first rear blade meet.

9. The apparatus according to any one of claims 1-4, characterized in that: The pollutant enrichment membrane is a sulfonated styrene-vinylbenzene copolymer membrane or a polydimethylsiloxane membrane.

10. The apparatus according to claim 9, characterized in that: The contamination enrichment also includes an upper protective plate and a lower protective plate with holes on their surfaces; The pollutant enrichment membrane is disposed between the upper protective plate and the lower protective plate.

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