A device for collecting wind-eroded materials from surface soil

Abstract

This invention provides a device for collecting wind-eroded matter from surface soil. The device includes a fan, an air delivery channel, a flexible connecting bag, an experimental chamber, a wind-eroded matter collection bag, and a portable dust concentration meter. The fan consists of a fan body and a battery. The fan outlet is connected to the air delivery channel, which is trapezoidal in shape and enclosed by the flexible connecting bag. The experimental chamber is a stainless steel cuboid with a circular opening at the top, where the extension tube of the portable dust concentration meter is fixed to obtain the dust release concentration. The wind-eroded matter collection bag is a stainless steel wire mesh bag fixed to the left side of the experimental chamber. This invention enables efficient and comprehensive collection of wind-eroded matter from surface soil, reduces operational difficulty, provides a reliable sample basis for subsequent detection and analysis of microplastic pollution, and can assist in in-depth research on soil microplastic pollution in fields such as environmental monitoring.

Description

Technical Field

[0001] This utility model relates to the field of environmental science experimental equipment technology, specifically a device for collecting wind-eroded materials from surface soil. Background Technology

[0002] Microplastics (MPs) refer to plastic fragments, particles, or films with a diameter of less than 5 mm, and are ubiquitous in water, atmosphere, and soil environments. For microplastics in soil environments, it is usually necessary to first collect soil samples containing microplastics. Existing soil sampling techniques for microplastics have significant limitations. On the one hand, traditional soil sampling equipment is mostly designed for obtaining static soil samples from static soil through methods such as excavation and drilling, and is only suitable for obtaining soil samples from fixed locations, making it difficult to capture dynamic soil samples of microplastics migrated by wind erosion. On the other hand, most existing soil sampling equipment is designed to capture mixtures of microplastics from different sources such as industrial emissions and road dust, lacking specific design for soil layers and thus unable to effectively collect local soil samples. Furthermore, while commonly used sand collectors can collect wind-eroded material and thus obtain some microplastics within it, their sampling mechanism does not distinguish between atmospheric deposition and native soil microplastics, leading to significant uncertainty regarding the origin of the obtained samples.

[0003] Therefore, there is an urgent need for a device to collect local surface soil that is susceptible to wind erosion, in order to solve the problem that existing technologies are unable to effectively and accurately detect microplastics in local surface soil that is susceptible to wind erosion, and to meet the urgent need for research on microplastics in surface soil that is susceptible to wind erosion. Utility Model Content

[0004] The purpose of this invention is to provide a device for collecting wind-eroded materials from surface soil. This device can simulate the changes in dust concentration under different wind conditions and efficiently collect wind-eroded materials from surface soil. The operation process is simple and the soil sample collection is accurate, which provides a good foundation for studying microplastics in wind-eroded materials.

[0005] This utility model is implemented as follows:

[0006] A device for collecting wind-eroded materials from surface soil includes a fan, an air supply channel, an experimental chamber, and a wind-eroded material collection bag connected in sequence. The experimental chamber is a cuboid structure with one open side, which is connected to the wind-eroded material collection bag. An opening is located near the bottom on the opposite side of the experimental chamber, through which the air supply channel connects to the experimental chamber and blows air into it. The middle area of ​​the bottom surface of the experimental chamber is a gap. The experimental chamber is placed on the ground, and the fan blows air into the experimental chamber through the air supply channel, thereby disturbing the surface soil at the gap area on the bottom surface of the experimental chamber. The wind-eroded materials, after being blown up, can enter the wind-eroded material collection bag through the open side of the experimental chamber.

[0007] In the above scheme, preferably, the air supply channel includes a connecting plate and a trapezoidal air supply channel welded to one side of the connecting plate. The trapezoidal air supply channel is a channel with openings at both ends, one end being a narrow port and the other end being a wide port. The narrow port of the trapezoidal air supply channel is welded to one side of the connecting plate. A connecting pipe is welded to the other side of the connecting plate. One end of the connecting pipe passes through the connecting plate and connects to the narrow port of the trapezoidal air supply channel, and the other end of the connecting pipe connects to the air outlet of the fan.

[0008] In the above scheme, preferably, a flexible connecting bag is wrapped around the air supply channel. One end of the flexible connecting bag is connected to the connecting plate, and the other end is connected to the opening at the bottom of one side of the experimental chamber. The trapezoidal air supply channel can extend into the experimental chamber from the opening at the bottom of one side of the experimental chamber.

[0009] In the above scheme, preferably, a solid edge is provided around the notch area on the bottom surface of the experimental chamber; a U-shaped slide rail is welded to the bottom of the side of the connecting plate where the trapezoidal air supply channel is welded, the U-shaped slide rail being a U-shaped structure formed by steel pipe; after the trapezoidal air supply channel extends into the experimental chamber from the opening at the bottom of one side of the experimental chamber, the U-shaped slide rail can slide along the solid edges on both sides of the notch area.

[0010] In the above scheme, preferably, a connecting edge extends outward from the opening at the bottom of one side of the experimental chamber, and an edge is provided around the side of the connecting plate facing the trapezoidal air supply channel. One end of the flexible connecting bag is connected to the edge of the connecting plate, and the other end is connected to the connecting edge extending outward from the opening at the bottom of one side of the experimental chamber.

[0011] In the above scheme, preferably, black rubber is pasted on the outer surface of the connecting edge and the side edge, and the two ends of the flexible connecting bag are respectively pasted on the black rubber of the connecting edge and the side edge, and the two ends of the flexible connecting bag are locked with buckles.

[0012] In the above scheme, preferably, an opening is made on the top surface of the experimental chamber, one end of the connecting pipe passes through the opening on the top surface of the experimental chamber and extends into the experimental chamber, and the other end is inserted into the detection port of the dust concentration meter, so that the dust concentration in the experimental chamber can be detected by the dust concentration meter.

[0013] In the above scheme, preferably, small glass windows for observing the internal conditions of the experimental chamber are provided on the top surface and side surface of the experimental chamber.

[0014] In the above scheme, preferably, both the wind erosion collection bag and the flexible connection bag are stainless steel wire mesh bags.

[0015] In the above scheme, preferably, the flexible connecting bag is a 100-mesh stainless steel wire mesh bag, and the wind erosion collection bag is a 500-mesh stainless steel wire mesh bag.

[0016] This invention can simulate the changes in dust concentration under several different wind conditions and efficiently collect wind-eroded materials from the surface soil, thus laying a good foundation for the study of microplastics in wind-eroded materials from the surface soil, and facilitating experimental operation and sample detection.

[0017] This invention enables efficient and comprehensive collection of wind-eroded materials from surface soil, reducing operational difficulty and providing a reliable sample basis for subsequent detection and analysis of microplastic pollution. It can also assist in in-depth research on soil microplastic pollution in fields such as environmental monitoring. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model.

[0019] Figure 2 This is a schematic diagram showing the connection between the fan and the air delivery channel of this utility model.

[0020] In the diagram: 1. Fan; 1-1. Battery; 1-2. Fan body; 2. Air delivery channel; 2-1. Connecting pipe port; 2-2. Connecting plate; 2-3. U-shaped slide rail; 2-4. Trapezoidal air delivery channel; 3. Flexible connecting bag; 4. Experimental chamber; 5. Wind erosion material collection bag; 6. Dust concentration meter; 6-1. Connecting pipe. Detailed Implementation

[0021] The technical solution of this utility model will now be described in conjunction with the accompanying drawings.

[0022] like Figure 1 As shown, the device for collecting wind-eroded materials from surface soil provided by this utility model mainly includes a fan 1, an air conveying channel 2, an experimental box 4, and a wind-eroded material collection bag 5.

[0023] The blower 1 includes a blower body 1-2 and a matching battery 1-1 mounted on the blower body 1-2 via a clip. The blower 1 in this invention is a six-speed adjustable lithium-ion blower manufactured by Shanghai Meinate Industrial (Group) Co., Ltd. A handle is provided on the blower body 1-2, and a switch for adjusting the speed of the blower 1 is located at the bottom of the handle, allowing adjustment of the airflow speed by changing the speed.

[0024] The air outlet of fan 1 is connected to the connecting pipe 2-1 of air delivery channel 2. For example... Figure 2As shown, the air supply channel 2 includes a connecting pipe port 2-1, a connecting plate 2-2, a U-shaped slide rail 2-3, and a trapezoidal air supply channel 2-4. The trapezoidal air supply channel 2-4 is a channel with a trapezoidal cross-section along the channel direction and open at both ends, used for allowing air blown by the fan 1 to pass through. It includes a narrow port and a wide port. The narrow port is the channel inlet, and the wide port is the channel outlet. Both the narrow and wide ports are rectangular structures. In this embodiment, the narrow port is 7cm long and 2cm wide, and the wide port is 15cm long and 2cm wide. The narrow port is welded to the middle part of one side of the connecting plate 2-2, and the connecting pipe 2-1 is welded to the other side of the connecting plate 2-2 at the position corresponding to the narrow port. In this utility model, the connecting pipe 2-1 is a cylindrical structure with open ends. Moreover, the connecting pipe 2-1 passes through the connecting plate 2-2 and connects to the narrow port of the trapezoidal air supply channel 2-4, so that the inner cavity of the connecting pipe 2-1 is connected to the inner cavity of the trapezoidal air supply channel 2-4.

[0025] The end of the connecting pipe 2-1 furthest from the connecting plate 2-2 is connected to the air outlet of the fan 1. The air outlet of the fan 1 has a cylindrical structure. The air outlet of the fan 1 is inserted into the connecting pipe 2-1. For example, an L-shaped groove can be made on the outer wall of the air outlet of the fan 1, and two hemispherical protrusions adapted to the two arm grooves of the L-shaped groove can be provided on the inner wall of the connecting pipe 2-1. These two hemispherical protrusions are not on the same generatrix of the inner wall of the connecting pipe 2-1. In this way, when the air outlet of the fan 1 is inserted into the connecting pipe 2-1, rotating the air outlet of the fan 1 will cause the two hemispherical protrusions to respectively engage with the corresponding grooves of the two arms of the L-shaped groove, thereby achieving a fixed connection between the connecting pipe 2-1 and the air outlet. Since the two hemispherical protrusions are respectively engaged with the corresponding grooves of the two arms of the L-shaped groove, the air outlet of the fan 1 cannot move in either the axial direction or the radial direction of the connecting pipe 2-1. Of course, the fixed connection between the air outlet of the fan 1 and the connecting pipe 2-1 can also be other methods known to those skilled in the art.

[0026] A perimeter is attached around the side of the connecting plate 2-2 facing the trapezoidal air duct 2-4. In this embodiment, the connecting plate 2-2 is a 20×8cm rectangular steel plate, and the perimeter includes two 20×2cm steel plates and two 8×2cm steel plates. The perimeter can be integrally formed with the connecting plate 2-2, and the four perimeters form a cuboid structure with one open end. The U-shaped slide rail 2-3 is a U-shaped structure formed by bending steel pipes (or by welding three steel pipes). The U-shaped slide rail 2-3 includes two parallel arms and a bottom edge connecting the two arms. The two ends of the U-shaped slide rail 2-3 (i.e., the free ends of the two arms) are respectively welded to the two ends of the lower edge of the connecting plate 2-2. The length of the trapezoidal air duct 2-4 is slightly greater than the arm length of the U-shaped slide rail 2-3, so that the wide end of the trapezoidal air duct 2-4 hangs down to the bottom edge of the U-shaped slide rail 2-3 in its natural state.

[0027] In this embodiment, the experimental chamber 4 is a stainless steel cuboid with dimensions of 34.5 × 20 × 15 cm (length × width × height). Figure 1 As shown, the left side of the experimental chamber 4 is completely open, and a wind erosion collection bag 5 is connected to it. The wind erosion collection bag 5 is a stainless steel wire mesh bag, approximately 30cm in length and 75cm in circumference at the opening. The mesh size of the stainless steel wire mesh bag is 500 mesh. The left side of the wind erosion collection bag 5 is sewn shut, and the right side is the opening. The right side is fixed to the left side of the experimental chamber 4 with an elastic rope to allow air circulation, but the wind erosion material will fall into the wind erosion collection bag 5.

[0028] The bottom surface of the experimental chamber 4 has a U-shaped structure, meaning that a solid edge extending inwards about 3cm wide is provided around the four edges of the bottom surface of the experimental chamber 4, and the central area enclosed by the solid edge is completely open, thus making the entire bottom surface U-shaped. In actual operation, the experimental chamber 4 is placed on the ground, with the central open part of the U-shaped structure of the bottom surface of the experimental chamber 4 in contact with the ground. Air is blown into this area by the fan 1, thereby forming wind-eroded material. The wind-eroded material blown up is collected by the wind-eroded material collection bag 5.

[0029] The bottom right side of the experimental chamber 4 is connected to the air supply channel 2. The right side of the experimental chamber 4 measures 20×15cm. A rectangular opening of 20×8cm is located near the bottom of the right side of the experimental chamber 4. The bottom edge of this rectangular opening is aligned with the bottom surface of the experimental chamber 4, and the left and right sides of the opening are aligned with the front and back of the experimental chamber 4, respectively. Around this rectangular opening, a solid edge approximately 2cm wide extends outwards and is perpendicular to the right side of the experimental chamber 4. This solid edge forms the connecting edge for connection with the flexible connecting bag 3.

[0030] The flexible connecting bag 3 is used to wrap the air supply channel 2. The air supply channel 2 can enter the interior of the experimental chamber 4 through the rectangular opening on the right side of the experimental chamber 4. Since the flexible connecting bag 3 is retractable, when part of the air supply channel 2 enters the experimental chamber 4, the flexible connecting bag 3 is in a compressed and unextended state.

[0031] In this embodiment, the flexible connecting bag 3 is a flexible bag structure with two openings, a length of 28cm, and a radial circumference of approximately 60cm. Specifically, the flexible connecting bag 3 is a 100-mesh stainless steel wire mesh cover. One end of the flexible connecting bag 3 is fixed to the connecting plate 2-2 of the air supply channel 2 by a buckle, and the other end is fixed to the connecting edge extending from the right side of the experimental chamber 4 by a buckle. The flexible connecting bag 3 can completely cover the trapezoidal air supply channel 2-4, which can prevent external wind from eroding the experimental surface inside the experimental chamber 4 during the experiment and avoid large errors.

[0032] To prevent the flexible connecting bag 3 from falling off, black rubber is affixed to the outer edges of the connecting plate 2-2. First, the flexible connecting bag 3 is placed over the edges of the connecting plate 2-2, adhering it to the edges. Then, a stainless steel lock is used to secure the flexible connecting bag 3. Similarly, black rubber is affixed to the outer edge of the connecting edge extending from the right side of the experimental chamber 4. The other end of the flexible connecting bag 3 is placed over this connecting edge, and then a stainless steel lock is used to secure the flexible connecting bag 3.

[0033] 15×5cm glass windows are provided on the front, rear, and top surfaces of the experimental chamber 4 to observe changes in the surface soil inside the chamber. A circular opening with a diameter of approximately 1.8cm is also provided on the top surface of the experimental chamber 4. A dust concentration meter 6 is connected to the experimental chamber 4 via a connecting pipe 6-1; one end of the connecting pipe 6-1 extends into the circular opening at the top of the experimental chamber 4, and the other end is inserted into the detection port of the dust concentration meter 6. The dust concentration meter 6 can be used to obtain the dust release concentration inside the experimental chamber 4, which can then be combined with wind erosion data for data analysis. In this invention, the dust concentration meter 6 is a portable dust concentration detector, manufactured by Shenzhen Honeywell Technology Co., Ltd., model HNAG900-PM-T, with a measuring range of 0-50mg / m³. 3 It has three testing modules: PM2.5, PM10, and TSP.

[0034] When the device provided by this utility model is in operation, first select the wind speed, press the switch on the handle of the fan body 1-2 to start the fan 1. The air enters the trapezoidal air conveying channel 2-4 through the fan outlet, and then enters the experimental chamber 4 through the trapezoidal air conveying channel 2-4, thereby blowing the soil surface covered by the experimental chamber 4. When the air blows through the outlet of the trapezoidal air conveying channel 2-4 inside the experimental chamber 4, the outlet of the trapezoidal air conveying channel 2-4 should be horizontal. Since the air inlet (narrow end) of the trapezoidal air conveying channel 2-4 is welded to the connecting plate 2-2, and the air outlet (wide end) of the trapezoidal air conveying channel 2-4 hangs down on the U-shaped slide rail 2-3 in its natural state, the air outlet in its natural state is a downward tilted structure, not horizontal. Therefore, in order to ensure that the air outlet is horizontal when blowing air, the operator needs to apply a certain force when holding the handle of the fan body 1-2. This force is transmitted through the fan body 1-2 and the connecting pipe 2-1 to the connecting plate 2-2, which in turn causes the trapezoidal air supply channel 2-4 to tilt upward, so that the trapezoidal air supply channel 2-4 remains horizontal, and the air blown from the air outlet is also horizontal.

[0035] At the beginning of the blowing process, the airflow from the outlet of the trapezoidal air duct 2-4 will stir up the surface soil near the end of the experimental chamber 4. To stir the surface soil at the far end of the experimental chamber 4, the operator needs to apply a pushing force to the fan body 1-2 through the handle. This force is transmitted to the connecting plate 2-2, which in turn pushes the U-shaped slide rail 2-3 and the trapezoidal air duct 2-4 together towards the far end of the experimental chamber 4. After the U-shaped slide rail 2-3 and the trapezoidal air duct 2-4 enter the experimental chamber 4, the U-shaped slide rail 2-3 moves forward along the solid edge of the bottom surface of the experimental chamber 4, while the trapezoidal air duct 2-4 maintains a horizontal airflow state with an upward tilt until all the surface soil inside the experimental chamber 4 is disturbed. The stirred-up surface soil will fall into the wind erosion collection bag 5. The dust concentration meter 6 obtains the dust concentration data inside the experimental chamber 4 by pumping. It should be noted that when the U-shaped slide rail 2-3 is pushed forward along the solid edge of the bottom surface of the experimental chamber 4, the two arms of the U-shaped slide rail 2-3 come into contact with the inner walls of the front and rear sides of the experimental chamber 4, thereby limiting the trapezoidal air supply channel 2-4 through the U-shaped slide rail 2-3 and preventing it from swaying left and right.

[0036] The movement of the surface soil inside the experimental chamber 4, the movement of the trapezoidal air conveying channels 2-4, and the upward tilt of the trapezoidal air conveying channels 2-4 can all be observed through the small glass window on the experimental chamber 4.

[0037] After collecting the wind-eroded material from the surface soil, the wind-eroded material collection bag 5 is removed, and the microplastic content in the collected wind-eroded material is further tested to obtain the microplastic content in the wind-eroded material of the surface soil. This utility model improves the convenience of field experimental operations, making it easier for researchers to conduct experiments and test samples.

Claims

1. An apparatus for collecting aeolian soil material from the ground surface, characterized in that, The device includes a fan, an air supply channel, an experimental chamber, and a wind erosion collection bag connected in sequence. The experimental chamber is a cuboid structure with one open side, which connects to the wind erosion collection bag. On the opposite side of the experimental chamber, near the bottom, there is an opening through which the air supply channel connects to the experimental chamber and blows air into it. The middle area of ​​the bottom surface of the experimental chamber is a gap. When the experimental chamber is placed on the ground, the fan blows air into the experimental chamber through the air supply channel, thus disturbing the surface soil at the gap area on the bottom surface of the experimental chamber. The wind erosion material, after being blown up, enters the wind erosion collection bag through the open side of the experimental chamber.

2. The device for collecting aeolian sediments of terrestrial soils according to claim 1, characterized in that, The air supply channel includes a connecting plate and a trapezoidal air supply channel welded to one side of the connecting plate. The trapezoidal air supply channel is a channel with openings at both ends, one end being a narrow port and the other end being a wide port. The narrow port of the trapezoidal air supply channel is welded to one side of the connecting plate. A connecting pipe is welded to the other side of the connecting plate. One end of the connecting pipe passes through the connecting plate and connects to the narrow port of the trapezoidal air supply channel, and the other end of the connecting pipe connects to the air outlet of the fan.

3. The device for collecting aeolian sediments of terrestrial soils according to claim 2, characterized in that in The air supply channel is surrounded by a flexible connecting bag. One end of the flexible connecting bag is connected to the connecting plate, and the other end is connected to the opening at the bottom of one side of the experimental chamber. The trapezoidal air supply channel can extend into the experimental chamber from the opening at the bottom of one side of the experimental chamber.

4. The apparatus for collecting wind-eroded surface soil according to claim 2 or 3, characterized in that, A solid edge is provided around the notch area on the bottom surface of the experimental chamber; a U-shaped slide rail is welded to the bottom of the side of the connecting plate where the trapezoidal air supply channel is welded, and the U-shaped slide rail is a U-shaped structure formed by steel pipe; after the trapezoidal air supply channel extends into the experimental chamber from the opening at the bottom of one side of the experimental chamber, the U-shaped slide rail can slide along the solid edges on both sides of the notch area.

5. The apparatus for collecting wind-eroded surface soil according to claim 3, characterized in that, in The experimental chamber has a connecting edge extending outward from the opening at the bottom of one side. The connecting plate has edges around the perimeter facing the trapezoidal air supply channel. One end of the flexible connecting bag is connected to the edge of the connecting plate, and the other end is connected to the connecting edge extending outward from the opening at the bottom of one side of the experimental chamber.

6. The apparatus for collecting wind-eroded surface soil according to claim 5, characterized in that, Black rubber is affixed to the outer surfaces of the connecting edge and the side edge. The two ends of the flexible connecting bag are respectively affixed to the black rubber on the connecting edge and the side edge, and the two ends of the flexible connecting bag are locked with buckles.

7. The apparatus for collecting wind-eroded materials from surface soil according to claim 1, characterized in that, in The experimental chamber has an opening on its top surface. One end of the connecting tube passes through the opening on the top surface of the experimental chamber and extends into the experimental chamber, while the other end is inserted into the detection port of the dust concentration meter. The dust concentration inside the experimental chamber is detected by the dust concentration meter.

8. The apparatus for collecting wind-eroded surface soil according to claim 1, characterized in that, Small glass windows are provided on the top and side surfaces of the experimental chamber for observing the interior of the chamber.

9. The apparatus for collecting wind-eroded surface soil according to claim 3, characterized in that, Both the wind erosion collection bag and the flexible connection bag are stainless steel wire mesh bags.

10. The apparatus for collecting wind-eroded surface soil according to claim 9, characterized in that, The flexible connecting bag is a 100-mesh stainless steel wire mesh bag, and the wind erosion collection bag is a 500-mesh stainless steel wire mesh bag.

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