Device for extracting microplastics from soil

Abstract

The device comprises a spherical bottle and a flotation pipe, the upper end of the spherical bottle is inserted into an insertion ring groove in the lower end of the flotation pipe, the top end of the flotation pipe is in a closed state and is connected with an overflow pipe, and an open cup is arranged on the outer portion of the upper end of the flotation pipe and on the side away from the overflow pipe. The lower end of the open cup is connected with a first connecting pipe in a vertical state, the lower end of the first connecting pipe is connected with an arc-shaped connecting pipe, the other end of the arc-shaped connecting pipe faces the lower end of the flotation pipe and is connected with a second connecting pipe, and the other end of the second connecting pipe is connected to the lower end of the flotation pipe. The micro-plastic extraction device is simple in structure and convenient to operate, and can ensure that liquid containing micro-plastic can be completely obtained in the process of extracting the micro-plastic from soil.

Description

Technical Field

[0001] The utility model relates to the technical field of microplastic extraction, in particular to a device for extracting microplastics from soil. Background Art

[0002] In the process of studying the amount and types of microplastics contained in the soil, it is necessary to first use a saturated sodium chloride solution to flotation extract the microplastics contained in the soil. The reason is that the density of microplastics is often smaller than the density of a saturated sodium chloride solution, allowing the microplastics to float on the upper layer of the solution.

[0003] In the above extraction process, the traditional operation is to add the soil sample to a saturated sodium chloride solution, stir it evenly, and then directly extract and absorb the upper liquid after the soil sample is evenly stirred, ultrasonicated and still. However, this acquisition method has a disadvantage, which is that it causes the upper liquid to oscillate, causing some of the liquid containing microplastics to flow downward, and thus making it impossible to completely obtain the liquid containing microplastics, affecting the final extraction data; at the same time, when the movement is large, it will also cause the entire water body to oscillate, affecting the normal liquid acquisition. To this end, we proposed a device for extracting microplastics from soil. Utility Model Content

[0004] The purpose of the utility model is to solve the shortcomings of the prior art and to propose a device for extracting microplastics from soil.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A device for extracting microplastics from soil comprises a spherical bottle and a flotation tube. The lower end of the flotation tube is open and provided with an inserting ring groove. The upper end of the spherical bottle is inserted into the inserting ring groove at the lower end of the flotation tube.

[0007] The top end of the flotation tube is in a closed state and is connected to an overflow tube. One end of the arc-shaped portion of the overflow tube is connected to the inside of the flotation tube, and the other end of the overflow tube is in a horizontal open state.

[0008] An open cup is provided on the outside of the upper end of the flotation tube and on a side away from the overflow tube, the lower end of the open cup is connected to a first connecting tube in a vertical state, the lower end of the first connecting tube is connected to an arc-shaped connecting tube, the other end of the arc-shaped connecting tube faces the lower end of the flotation tube and is connected to a second connecting tube, the other end of the second connecting tube is connected to the lower end of the flotation tube.

[0009] A valve is installed on the second connecting pipe. The second connecting pipe is inclined upward relative to the flotation tube on a horizontal plane, and the angle between the second connecting pipe and the horizontal plane is 8-10 degrees.

[0010] Preferably, the spherical bottle is a glass bottle, the flotation tube and the overflow tube are both glass tubes, and the overflow tube and the flotation tube are welded.

[0011] Preferably, the surface of the portion of the upper end of the spherical bottle inserted into the flotation tube is frosted, and the frosted surface of the spherical bottle is tightly matched with the tube wall surface of the flotation tube corresponding to the inserting ring groove.

[0012] Preferably, the open cup is a glass cup, the first connecting tube, the arc-shaped connecting tube and the second connecting tube are glass tubes, the valve is a glass valve, the open cup, the first connecting tube, the arc-shaped connecting tube, the second connecting tube, the valve and the flotation tube are welded and connected, and when the valve is opened, the open cup, the first connecting tube, the arc-shaped connecting tube and the second connecting tube are connected.

[0013] Preferably, a stabilizing rod is commonly connected between the outer side of the upper end of the flotation tube and the upper end of the first connecting tube.

[0014] Preferably, the stabilizing rod is a glass rod, and both ends of the stabilizing rod are welded to the corresponding flotation tube and open cup.

[0015] The utility model proposes a device for extracting microplastics from soil, which has the following beneficial effects: during the entire extraction process, the liquid surface layer containing microplastics flows upward as a whole and finally flows out from the overflow pipe; and accompanied by the continuous addition of saturated sodium chloride solution, the phenomenon of microplastics and liquid containing microplastics being contaminated on the inner wall of the overflow pipe during the outflow process is avoided, thereby ensuring that the liquid containing microplastics is completely obtained and avoiding affecting the final extraction data; further, during the overflow acquisition process of the liquid, no oscillation is generated to the water environment in the spherical bottle, ensuring that the extraction process is carried out normally and efficiently. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of a device for extracting microplastics from soil proposed by the utility model;

[0017] Figure 2 This is a schematic diagram of the internal structure of a flotation tube of a device for extracting microplastics from soil proposed by the utility model.

[0018] In the figure: a spherical bottle 1, a flotation tube 2, a plug-in ring groove 201, an overflow pipe 3, a first connecting pipe 4, an arc-shaped connecting pipe 5, a second connecting pipe 6, an open cup 7, a valve 8, and a stabilizing rod 9. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0020] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0021] Reference Figure 1-2 A device for extracting microplastics from soil includes a spherical bottle 1 and a flotation tube 2. The lower end of the flotation tube 2 is open and has a plug-in ring groove 201. The upper end of the spherical bottle 1 is inserted into the plug-in ring groove 201 at the lower end of the flotation tube 2.

[0022] The top end of the flotation tube 2 is in a closed state and is connected to an overflow tube 3. One end of the arc-shaped portion of the overflow tube 3 is connected to the inside of the flotation tube 2, and the other end of the overflow tube 3 is in a horizontally open state. The spherical bottle 1 is a glass bottle, and the flotation tube 2 and the overflow tube 3 are both glass tubes. The overflow tube 3 and the flotation tube 2 are welded.

[0023] The surface of the portion of the upper end of the spherical bottle 1 inserted into the flotation tube 2 is in a frosted state, and the frosted surface of the spherical bottle 1 is tightly matched with the tube wall surface of the flotation tube 2 corresponding to the plug-in ring groove 201, thereby avoiding leakage from the plug-in portion of the spherical bottle 1 and the flotation tube 2 during use.

[0024] An open cup 7 is provided on the outer side of the upper end of the flotation tube 2 and away from the overflow tube 3. The lower end of the open cup 7 is connected to a first connecting tube 4 in a vertical state. The lower end of the first connecting tube 4 is connected to an arc-shaped connecting tube 5. The other end of the arc-shaped connecting tube 5 faces the lower end of the flotation tube 2 and is connected to a second connecting tube 6. The other end of the second connecting tube 6 is connected to the lower end of the flotation tube 2.

[0025] A valve 8 is installed on the second connecting pipe 6. The second connecting pipe 6 is inclined upward relative to the flotation tube 2 on the horizontal plane, and the angle between the second connecting pipe 6 and the horizontal plane is 8 degrees.

[0026] The open cup 7 is a glass cup, the first connecting tube 4, the arc-shaped connecting tube 5, and the second connecting tube 6 are glass tubes, and the valve 8 is a glass valve. The open cup 7, the first connecting tube 4, the arc-shaped connecting tube 5, the second connecting tube 6, the valve 8, and the flotation tube 2 are welded and connected, and when the valve 8 is opened, the open cup 7, the first connecting tube 4, the arc-shaped connecting tube 5, and the second connecting tube 6 are connected.

[0027] A stabilizing rod 9 is commonly connected between the outer side of the upper end of the flotation tube 2 and the upper end of the first connecting tube 4. The stabilizing rod 9 is a glass rod. Both ends of the stabilizing rod 9 are welded to the corresponding flotation tube 2 and the open cup 7. The stabilizing rod 9 can enhance the stability of the structure formed by the first connecting tube 4, the arc-shaped connecting tube 5, the second connecting tube 6, the flotation tube 2, and the open cup 7.

[0028] In summary, in the specific use of the utility model, firstly, the soil to be extracted and the saturated sodium chloride solution are poured into the spherical bottle 1, and after being fully stirred with a glass rod, water bath ultrasound is performed to ensure that the microplastics are separated from the soil and enter the liquid. After completion, the lower end of the flotation tube 2 is plugged into the upper end of the spherical bottle 1, and the saturated sodium chloride solution is added through the open cup 7 with the valve 8 opened. When the liquid level of the solution reaches the upper end of the flotation tube 2, the valve 8 is closed and the pouring of the saturated sodium chloride solution is stopped; after ensuring that the entire device is stationary for a certain period of time, the microplastics will be at the liquid surface layer at the upper end of the flotation tube under the action of buoyancy;

[0029] At this time, when the valve 8 is opened and the saturated sodium chloride solution is slowly poured in again through the open cup 7, the liquid at the liquid surface layer at the upper end of the flotation tube 2 will move upward as a whole and eventually flow out of the device through the overflow pipe 3, thereby realizing the extraction of microplastics in the soil.

[0030] During the entire extraction process, the liquid surface layer containing microplastics flows upward as a whole and eventually flows out from the overflow tube 3; and accompanied by the continuous and slow addition of saturated sodium chloride solution, the phenomenon of microplastics and liquid containing microplastics being contaminated on the inner wall of the overflow tube 3 during the outflow process is avoided, thereby ensuring that the liquid containing microplastics is completely obtained and avoiding affecting the final extraction data; further, in the process of liquid overflow acquisition, it will not cause oscillation to the water environment in the spherical bottle 1, ensuring the normal and efficient extraction process.

[0031] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A device for extracting microplastics from soil, comprising a spherical bottle (1) and a flotation tube (2), characterized in that: The lower end of the flotation tube (2) is in an open state and is provided with an inserting ring groove (201), and the upper end of the spherical bottle (1) is inserted into the inserting ring groove (201) at the lower end of the flotation tube (2); The top end of the flotation tube (2) is in a closed state and is connected to an overflow tube (3); one end of the arc-shaped portion of the overflow tube (3) is connected to the inside of the flotation tube (2), and the other end of the overflow tube (3) is in a horizontal open state; An open cup (7) is provided outside the upper end of the flotation tube (2) and on a side away from the overflow tube (3); the lower end of the open cup (7) is connected to a first connecting tube (4) in a vertical state; the lower end of the first connecting tube (4) is connected to an arc-shaped connecting tube (5); the other end of the arc-shaped connecting tube (5) faces the lower end of the flotation tube (2) and is connected to a second connecting tube (6); the other end of the second connecting tube (6) is connected to the lower end of the flotation tube (2); The second connecting pipe (6) is provided with a valve (8), and the second connecting pipe (6) is inclined upward relative to the flotation pipe (2) on a horizontal plane, and the angle between the second connecting pipe (6) and the horizontal plane is 8-10 degrees.

2. A device for extracting microplastics from soil according to claim 1, characterized in that: The spherical bottle (1) is a glass bottle, the flotation tube (2) and the overflow tube (3) are both glass tubes, and the overflow tube (3) and the flotation tube (2) are welded.

3. A device for extracting microplastics from soil according to claim 2, characterized in that: The surface of the portion of the upper end of the spherical bottle (1) inserted into the flotation tube (2) is in a frosted state, and the frosted surface of the spherical bottle (1) is tightly matched with the tube wall surface of the flotation tube (2) corresponding to the insertion ring groove (201).

4. A device for extracting microplastics from soil according to claim 2, characterized in that: The open cup (7) is a glass cup, the first connecting pipe (4), the arc-shaped connecting pipe (5) and the second connecting pipe (6) are glass pipes, the valve (8) is a glass valve, the open cup (7), the first connecting pipe (4), the arc-shaped connecting pipe (5), the second connecting pipe (6), the valve (8) and the flotation tube (2) are welded and connected, and when the valve (8) is opened, the open cup (7), the first connecting pipe (4), the arc-shaped connecting pipe (5) and the second connecting pipe (6) are connected.

5. A device for extracting microplastics from soil according to claim 4, characterized in that: A stabilizing rod (9) is commonly connected between the outer side of the upper end of the flotation tube (2) and the upper end of the first connecting tube (4).

6. A device for extracting microplastics from soil according to claim 5, characterized in that: The stabilizing rod (9) is a glass rod, and the two ends of the stabilizing rod (9) are welded to the corresponding flotation tube (2) and the open cup (7).

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