A quantitative collection device and collection method for original soil leaching solution

Abstract

The invention discloses a quantitative collection device and a collection method for original soil leachate solution, which relates to the field of soil monitoring equipment and comprises: an interceptor and a water receiving seat for vertically inserting into the soil, wherein the interceptor is a cylindrical structure with openings at both ends, the horizontal plane where the top of the interceptor is located is not lower than the horizontal plane where the ground surface is located, an operation pit extending toward the bottom of the interceptor is arranged in the soil outside the interceptor, and after the interceptor is inserted into the soil, the water receiving seat is assembled with the bottom of the interceptor in the operation pit; in the invention, the interceptor is inserted into the soil, and the soil is framed in situ, which ensures that the soil structure inside the interceptor is not damaged, the soil volume inside the interceptor does not change, and the soil inside the interceptor has no contact with the external soil, and the water receiving seat receives only the leachate solution of the fixed volume of soil inside the interceptor, thereby realizing the collection of the leachate solution of the soil in a specified range without destroying the soil structure, and improving the detection accuracy of various soil data.

Description

Technical Field

[0001] The invention relates to the field of soil monitoring equipment, and in particular to a quantitative collection device and method for original soil leachate. Background Art

[0002] Leaching refers to a soil process in which soluble or suspended compounds in soil materials (clay, organic matter, soluble salts, carbonates, and iron and aluminum oxides, etc.) migrate from the upper part of the soil to the lower part, or migrate laterally, under the action of seepage water. This process is common in soils. Leaching includes leaching, chelation leaching, and mechanical leaching. During the leaching process, soil materials may undergo dissolution, chemical extraction, chelation, and mechanical leaching. Leaching leads to the loss of material from the upper part of the soil and the formation of a leaching layer. Soil materials leached from the upper layer to the lower layer of the soil profile often settle in the lower layer to form various sedimentation layers. Leaching can also cause certain soil materials to be completely lost from the soil profile along with groundwater.

[0003] In general, nutrients and pollutants in the soil can easily enter the groundwater through leaching, causing soil nutrient loss, groundwater pollution and other problems. Regularly collecting soil leaching solutions for relevant indicator monitoring and understanding the leaching status of soil nutrients and pollutants can provide basic data for rational land management and soil health maintenance.

[0004] However, traditional methods of collecting soil leaching solutions will either destroy the soil, change the original soil structure, and change the soil water leaching law; or it is difficult to accurately quantify the soil range where leaching occurs, and it is difficult to establish a quantitative relationship between leached substances and soil volume.

[0005] For example, the invention patent with application number "201410199148.2" and name "New Soil Solution Sampler" discloses a leachate solution collection device, which includes a ceramic head, a main body, an end cover, an air guide tube, and a sampling tube. It also includes a measuring cup, a bracket, an air guide control valve, and a sampling control valve. The lower end of the main body is provided with a ceramic head, the upper end of the main body is screwed with an end cover, and an air guide tube is inserted in the end cover. One end of the sampling tube is inserted in the end cover, and the other end of the sampling tube is inserted in the measuring cup. The air guide tube is provided with The air guide control valve is provided on the sampling tube, and a bracket is screwed on the main pipe body. When in use, first drill the place where sampling is required to be done to a suitable depth, then screw the bracket to a suitable height, insert the main pipe body into the drill hole, and then fix the bracket on the ground surface. Then the sampling liquid is drawn up and directly enters the measuring cup. However, the leaching solution is directly extracted from a specific position in the soil, and the soil range of the extracted leaching solution cannot be determined. It is difficult to establish a quantitative relationship between the leached substance and the soil volume, which reduces the monitoring accuracy of the soil.

[0006] The invention patent with application number "202011125025.6" and name "A method for simulating leaching of stratified collection and transfer of original soil" discloses a leaching solution collection device, including a stratified collection system, a stratified leaching system and a stratified filtration system. By designing a matching sample stratified collection system, original soil samples of different depths can be transferred from a natural environment to a culture experimental vessel. A split sample chamber is designed for soils in different states, and a corresponding soil sample transfer method is formed. However, during the transfer process of original soil at different depths, the soil structure changes and differs from the original soil structure, which changes the soil water leaching law and cannot effectively represent the in-situ soil, thereby reducing the experimental accuracy.

[0007] Therefore, people are in urgent need of an original soil leachate quantitative collection device that can collect leachate from a specified range of soil without destroying the soil structure and improve the detection accuracy of various soil data. Summary of the invention

[0008] The purpose of the present invention is to provide a quantitative collection device and method for original soil leachate to solve the problems existing in the above-mentioned prior art, collect leachate from a specified range of soil without destroying the soil structure, and improve the detection accuracy of various soil data.

[0009] To achieve the above-mentioned purpose, the present invention provides the following scheme: The present invention provides an original soil leachate quantitative collection device, comprising an interceptor and a water receiving seat for vertically inserting into the soil, the interceptor is a cylindrical structure with openings at both ends, the horizontal plane at which the top of the interceptor is located is not lower than the horizontal plane at which the ground surface is located, and an operating pit extending toward the bottom of the interceptor is provided in the soil outside the interceptor. After the interceptor is inserted into the soil, the water receiving seat is assembled with the bottom end of the interceptor in the operating pit to seal the bottom end opening of the interceptor.

[0010] Preferably, when the horizontal plane where the top end of the interceptor is located is flush with the horizontal plane where the ground is located, the top end of the interceptor is connected to an annular force-applying portion for pulling the interceptor out of the soil, and the annular force-applying portion is provided with a plurality of through holes distributed in an annular shape; when the horizontal plane where the top end of the interceptor is located is higher than the horizontal plane where the ground is located, the top of the interceptor is provided with a plurality of through holes distributed in an annular shape.

[0011] Preferably, the lower edge of the through hole is flush with the horizontal plane where the ground surface is located, and the spacing between adjacent through holes is the same.

[0012] Preferably, a vaseline solidification layer is poured between the inner wall of the interceptor and the soil in the interceptor.

[0013] Preferably, it further comprises a shower solution collecting unit for collecting shower solution, and the bottom of the water receiving seat is connected to the shower solution collecting unit via a connecting pipe.

[0014] Preferably, the shower solution collection unit includes a shower solution collection barrel, a water suction pipe and a ventilation pipe. The bottom of the water receiving seat is connected to the shower solution collection barrel through a connecting pipe. The water suction pipe is connected to the bottom of the inner cavity of the shower solution collection barrel, and the ventilation pipe is connected to the top of the inner cavity of the shower solution collection barrel.

[0015] Preferably, the horizontal plane where the top end of the shower solution collection bucket is located is lower than the horizontal plane where the bottom end of the water receiving seat is located.

[0016] Preferably, the inner bottom surface of the water receiving seat is inclined, and the connecting pipe is connected to the lower end of the inner bottom surface of the water receiving seat.

[0017] Preferably, a quartz sand layer is laid in the water receiving seat, and a nylon mesh layer is laid on top of the quartz sand layer.

[0018] The present invention also provides a collection method of the above-mentioned original soil leachate quantitative collection device, comprising the following steps:

[0019] S1: Insert the interceptor vertically into the soil of the area to be tested, and ensure that the lower edge of the through hole is flush with the horizontal plane of the ground surface;

[0020] S2: digging a vertical operation pit from the side of the interceptor, the depth of the vertical operation pit is greater than the insertion depth of the interceptor, digging a horizontal operation pit at a position corresponding to the bottom of the interceptor in the vertical operation pit, and extending the horizontal operation pit to the bottom of the interceptor;

[0021] S3: heating and melting vaseline, and pouring it along the inner wall of the interceptor to seal the gap between the soil and the inner wall of the interceptor;

[0022] S4: manually connect the water receiving seat to the bottom of the interceptor, and fill the area below the water receiving seat with soil;

[0023] S5: Place the leaching solution collection bucket at the bottom of the vertical operation pit, with the vent pipe and the water pump pipe in a closed state, and the leaching solution continuously flows into the leaching solution collection bucket;

[0024] S6: Open the ventilation pipe and the water extraction pipe, and extract the leaching solution in the leaching solution collection bucket through the water extraction pipe.

[0025] Compared with the prior art, the present invention has achieved the following technical effects:

[0026] 1. In the present invention, the interceptor with a cylindrical structure is first vertically inserted into the soil, and an operating pit extending toward the bottom of the interceptor is provided in the soil outside the interceptor. The water receiving seat and the bottom end of the interceptor are assembled by using the operating pit. At this time, the water receiving seat can receive the leaching solution of the soil in the interceptor. Due to the cylindrical structure of the interceptor and its vertical insertion into the soil, a certain volume of soil is framed in situ, which not only ensures that the soil structure inside the interceptor is not damaged, but also that the volume of the soil in the interceptor does not change. In addition, since the horizontal plane where the top of the interceptor is located is not lower than the horizontal plane where the ground surface is located, the soil in the interceptor has no contact with the external soil, and the water receiving seat receives only the leaching solution of the fixed volume of soil in the interceptor. Therefore, the leaching solution of the soil in a specified range is collected without destroying the soil structure, which is beneficial to improving the detection accuracy of various soil data.

[0027] 2. In the present invention, no matter the horizontal plane where the top of the interceptor is flush with the horizontal plane where the ground is, the through hole opened on the annular force-applying portion, or when the horizontal plane where the top of the interceptor is higher than the horizontal plane where the ground is, the through hole opened on the top of the interceptor facilitates the staff to conveniently remove the interceptor from the soil using auxiliary tools such as supporting rods or hooks after the sampling of the leaching solution is completed, thereby greatly improving the convenience of operation.

[0028] 3. In the present invention, drainage is performed by using through holes whose lower edges are flush with the horizontal plane of the ground surface and whose adjacent holes have the same spacing, so that surface runoff is generated in the soil above the interceptor, which is closer to nature and does not produce water accumulation. Instead, the amount of leaching solution is increased compared to the natural environment, which is conducive to receiving an amount of leaching solution that is closer to the natural environment, thereby improving the detection accuracy of various soil data.

[0029] 4. The provision of the vaseline solidification layer in the present invention fills the gap between the inner wall of the interceptor and the soil in the interceptor, preventing the leaching solution from leaving the gap, ensuring that the leaching solution completely passes through the soil in the interceptor, and further improving the detection accuracy of various soil data. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0031] Figure 1 It is a schematic structural diagram of the device for quantitatively collecting the original soil leaching solution of the present invention;

[0032] Among them, 1. interceptor; 2. water receiving seat; 3. connecting pipe; 4. leachate collection bucket; 5. ventilation pipe; 6. suction pipe; 7. quartz sand layer; 8. vertical operation pit; 9. horizontal operation pit; 10. through hole. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] The purpose of the present invention is to provide a quantitative collection device and method for original soil leachate to solve the problems existing in the prior art, collect leachate from a specified range of soil without destroying the soil structure, and improve the detection accuracy of various soil data.

[0035] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0036] Please refer to Figure 1As shown, a quantitative collection device for original soil leachate solution is provided, comprising an interceptor 1 for vertically inserting into the soil and a water receiving seat 2. The interceptor 1 is a cylindrical structure with openings at both ends. In order to improve the strength and corrosion resistance of the interceptor 1, the interceptor 1 is made of stainless steel. In order to ensure that the interceptor 1 does not deform after being inserted into the soil, the bottom end of the interceptor 1 can be cut into an annular tip to facilitate the insertion and breaking of the interceptor 1. The horizontal plane where the top of the interceptor 1 is located is not lower than the horizontal plane where the ground surface is located. An operating pit extending to the bottom of the interceptor 1 is provided in the soil outside the interceptor 1. After the interceptor 1 is inserted into the soil, the water receiving seat 2 is assembled with the bottom end of the interceptor 1 in the operating pit to block the bottom end opening of the interceptor 1. The assembly method can be to set the inner diameter of the water receiving seat 2 to be the same as the outer diameter of the interceptor 1, and insert the water receiving seat 2 into the bottom end of the interceptor 1. In order to avoid the leachate solution Overflow from the connection between the two. In the case where a suction device for the leaching solution in the water receiving seat 2 is not provided, a sealing ring needs to be provided at the connection between the water receiving seat 2 and the interceptor 1. After the leaching solution enters the soil for a period of time, the water receiving seat 2 is unplugged and taken out to detect the leaching solution therein. Due to the cylindrical structure of the interceptor 1 and its vertical insertion into the soil, a certain volume of soil is framed in situ, which not only ensures that the soil structure inside the interceptor 1 is not damaged, but also that the soil volume in the interceptor 1 does not change. In addition, since the horizontal plane where the top of the interceptor 1 is located is not lower than the horizontal plane where the ground surface is located, the soil in the interceptor 1 has no contact with the external soil. The water receiving seat 2 receives only the leaching solution of the fixed volume of soil in the interceptor 1. Therefore, the leaching solution of the soil in a specified range is collected without destroying the soil structure, which is beneficial to improving the detection accuracy of various soil data.

[0037] When the horizontal plane where the top of the interceptor 1 is located is flush with the horizontal plane where the ground is located, the top of the interceptor 1 is connected with an annular force-applying part for pulling the interceptor 1 out of the soil. The inner diameter of the annular force-applying part should not be less than the inner diameter of the interceptor 1. The annular force-applying part can be integrally arranged with the interceptor 1 to enhance the structural strength. A plurality of through holes 10 distributed in an annular shape are provided on the force-applying part; when the horizontal plane where the top of the interceptor 1 is located is higher than the horizontal plane where the ground is located, a plurality of through holes 10 distributed in an annular shape are provided on the top of the interceptor 1. Regardless of whether the horizontal plane where the top of the interceptor 1 is located is flush with the horizontal plane where the ground is located, the through holes 10 provided on the annular force-applying part, or the through holes 10 provided on the top of the interceptor 1 when the horizontal plane where the top of the interceptor 1 is located is higher than the horizontal plane where the ground is located, the through holes 10 provided on the top of the interceptor 1 are convenient for the staff to use auxiliary support rods or hooks and other tools to conveniently remove the interceptor 1 from the soil after the sampling of the leaching solution is completed, thereby greatly improving the convenience of operation.

[0038] The shape of the through hole 10 can be circular, square, etc.

[0039] In order to make the soil above the interceptor 1 produce surface runoff, which is closer to nature and does not produce water accumulation and increase the amount of leachate compared to the natural environment, the lower edge of the through hole 10 is set flush with the horizontal plane of the ground surface, and the spacing between adjacent through holes 10 is the same, which is conducive to receiving an amount of leachate that is closer to the natural environment, thereby improving the detection accuracy of various soil data.

[0040] A vaseline solidification layer is poured between the inner wall of interceptor 1 and the soil in interceptor 1. The vaseline solidification layer is used to fill the gap between the inner wall of interceptor 1 and the soil in interceptor 1, thereby preventing the leachate from remaining in the gap and ensuring that the leachate completely passes through the soil in interceptor 1, further improving the detection accuracy of various soil data.

[0041] Since the shape of the water receiving seat 2 matches the shape of the bottom end of the interceptor 1, and since digging the operating pit in the soil is relatively laborious, the receiving volume of the water receiving seat 2 may be small, and the staff needs to frequently take out the water receiving seat 2. In order to improve the convenience of operation, a shower solution collecting unit for collecting shower solution is also provided. The bottom of the water receiving seat 2 is connected to the shower solution collecting unit through a connecting pipe 3. The liquid volume of the shower solution collecting unit can be determined according to the rainfall in different regions and the soil surface area in the interceptor 1.

[0042] After the eluent collection unit is provided, there is no need to disassemble the water receiving seat 2. At this time, the position of the water receiving seat 2 can be fixed by welding, and then sealant can be injected into the unwelded position to achieve the sealing between the water receiving seat 2 and the interceptor 1.

[0043] The shower solution collection unit includes a shower solution collection barrel 4, a water suction pipe 6 and a ventilation pipe 5. The bottom of the water receiving seat 2 is connected to the shower solution collection barrel 4 through a connecting pipe 3. The water suction pipe 6 is connected to the bottom of the inner cavity of the shower solution collection barrel 4. The ventilation pipe 5 is connected to the top of the inner cavity of the shower solution collection barrel 4.

[0044] In order to reduce energy consumption, the horizontal plane where the top of the shower solution collection barrel 4 is located is set lower than the horizontal plane where the bottom of the water receiving seat 2 is located, so that the shower solution in the water receiving seat 2 naturally flows into the shower solution collection barrel 4.

[0045] In order to facilitate the shower solution in the water receiving seat 2 to flow into the shower solution collecting bucket 4, the inner bottom surface of the water receiving seat 2 is inclined, and the connecting pipe 3 is connected to the lower end of the inner bottom surface of the water receiving seat 2.

[0046] Since the leachate solution may carry particulate debris during its movement from the soil, in order to prevent the debris from entering the leachate solution collection bucket 4 or clogging the entrance of the connecting pipe 3, a quartz sand layer 7 is laid in the water receiving seat 2, and the quartz sand layer 7 is coated with a nylon mesh layer. The quartz sand layer 7 is used to filter the leachate solution, and the nylon mesh layer is used to prevent the quartz sand from moving with the water flow and clogging the connecting pipe 3.

[0047] The present invention also provides a collection method of the above-mentioned original soil leachate quantitative collection device, comprising the following steps:

[0048] S1: Use auxiliary tools to vertically insert the interceptor 1 into the soil of the area to be tested, and ensure that the lower edge of the through hole 10 provided on the annular force-applying part or the interceptor 1 itself is flush with the horizontal plane of the ground surface;

[0049] S2: A vertical operation pit 8 is dug from the side of the interceptor 1. The depth of the vertical operation pit 8 is greater than the insertion depth of the interceptor 1. A horizontal operation pit 9 is dug in the vertical operation pit 8 at a position corresponding to the bottom of the interceptor 1. The horizontal operation pit 9 extends to the bottom of the interceptor 1. The size of the horizontal operation pit 9 must ensure that the staff's arms and the water receiving seat 2 can enter and complete the connection between the water receiving seat 2 and the interceptor 1. The size of the vertical operation pit 8 must ensure that the staff can enter;

[0050] S3: heating and melting vaseline, and pouring it along the inner wall of the interceptor 1 to seal the gap between the soil and the inner wall of the interceptor 1. When the staff observes from the lateral operation pit 9 that the vaseline melt flows out evenly from the lower end of the interceptor 1, the pouring of the vaseline melt is stopped;

[0051] S4: manually connect the water receiving seat 2 to the bottom of the interceptor 1, and fill the bottom of the water receiving seat 2 with soil to provide certain support for the water receiving seat 2;

[0052] S5: Place the shower solution collection bucket 4 at the bottom of the vertical operation pit 8, ensure that the horizontal plane at the top of the shower solution collection bucket 4 is lower than the horizontal plane at the bottom of the water receiving seat 2, the vent pipe 5 and the water pump 6 are in a closed state, and the shower solution continuously flows into the shower solution collection bucket 4;

[0053] S6: Open the ventilation pipe 5 and the water extraction pipe 6, and extract the eluent in the eluent collection bucket 4 through the water extraction pipe 6.

[0054] Adaptive changes made according to actual needs are all within the protection scope of the present invention.

[0055] It should be noted that it is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any reference numerals in the claims should not be regarded as limiting the claims involved.

[0056] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A quantitative collection device for original soil leachate, characterized in that: It comprises an interceptor and a water receiving seat for vertical insertion into the soil. The interceptor is a cylindrical structure with openings at both ends. The bottom end of the interceptor is fully open. The horizontal plane where the top end of the interceptor is located is not lower than the horizontal plane where the ground surface is located. An operation pit extending toward the bottom of the interceptor is arranged in the soil outside the interceptor. The inner diameter of the water receiving seat is the same as the outer diameter of the interceptor. After the interceptor is inserted into the soil, the water receiving seat is assembled with the bottom end of the interceptor in the operation pit to block the bottom end opening of the interceptor. When the horizontal plane where the top of the interceptor is located is flush with the horizontal plane where the ground is located, the top of the interceptor is connected to an annular force-applying part for pulling the interceptor out of the soil, and the force-applying part is provided with a plurality of through holes distributed in an annular shape, the lower edges of the through holes are flush with the horizontal plane where the ground is located, and the spacing between adjacent through holes is the same; when the horizontal plane where the top of the interceptor is located is higher than the horizontal plane where the ground is located, the top of the interceptor is provided with a plurality of through holes distributed in an annular shape, the lower edges of the through holes are flush with the horizontal plane where the ground is located, and the spacing between adjacent through holes is the same; The original soil leachate quantitative collection device comprises a leachate collection unit for collecting leachate, and the bottom of the water receiving seat is connected to the leachate collection unit through a connecting pipe; The shower solution collection unit includes a shower solution collection bucket, a water extraction pipe and a vent pipe, the bottom of the water receiving seat is connected to the shower solution collection bucket through a connecting pipe, the water extraction pipe is connected to the bottom of the inner cavity of the shower solution collection bucket, and the vent pipe is connected to the top of the inner cavity of the shower solution collection bucket; The collection method of the original soil leaching solution quantitative collection device comprises the following steps: S1: Insert the interceptor vertically into the soil of the area to be tested, and ensure that the lower edge of the through hole is flush with the horizontal plane of the ground surface; S2: digging a vertical operation pit from the side of the interceptor, the depth of the vertical operation pit is greater than the insertion depth of the interceptor, digging a horizontal operation pit at a position corresponding to the bottom of the interceptor in the vertical operation pit, and extending the horizontal operation pit to the bottom of the interceptor; S3: heating and melting vaseline, and pouring it along the inner wall of the interceptor to seal the gap between the soil and the inner wall of the interceptor; S4: manually connect the water receiving seat to the bottom of the interceptor, and fill the area below the water receiving seat with soil; S5: Place the leaching solution collection bucket at the bottom of the vertical operation pit, with the vent pipe and the water pump pipe in a closed state, and the leaching solution continuously flows into the leaching solution collection bucket; S6: Open the ventilation pipe and the water extraction pipe, and extract the leaching solution in the leaching solution collection bucket through the water extraction pipe.

2. The device for quantitatively collecting original soil leachate according to claim 1, characterized in that: A vaseline solidification layer is poured between the inner wall of the interceptor and the soil in the interceptor.

3. The device for quantitatively collecting original soil leachate according to claim 1, characterized in that: The horizontal plane where the top end of the shower solution collecting bucket is located is lower than the horizontal plane where the bottom end of the water receiving seat is located.

4. The device for quantitatively collecting original soil leachate according to claim 3 is characterized in that: The inner bottom surface of the water receiving seat is inclined, and the connecting pipe is connected to the lower end of the inner bottom surface of the water receiving seat.

5. The device for quantitatively collecting original soil leachate according to claim 1, characterized in that: A quartz sand layer is laid in the water receiving seat, and a nylon mesh layer is laid above the quartz sand layer.

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