Field deep soil leachate sampler

Abstract

The invention relates to the technical field of soil leachate sampling, in particular to a field deep soil leachate sampler which comprises a pipe body, a plurality of through holes are formed in the pipe body at equal intervals in the axis direction, a filter cloth layer is wound on the pipe body and located on the outer sides of the through holes, and the two sides of the filter cloth layer are connected with binding belts for fixing. One side of the bottom end of the pipe body is communicated with a water taking pipe, a filter membrane is connected into the water taking pipe, and one end of the water taking pipe is sleeved with an end cover. After the soil leachate is in contact with the filter cloth layer, the filter cloth layer filters soil impurities in the soil leachate, and the filtered soil leachate penetrates through the through holes, enters the pipe body, moves downwards along the inner wall of the pipe body and gathers at the bottom of the pipe body, so that the soil leachate is conveniently collected and sampled; soil impurities in the soil leachate are filtered through the filter cloth layer, so that the influence of the soil impurities on the soil leachate is reduced, and the sampling quality of the soil leachate is improved.

Description

Technical Field

[0001] The invention relates to the technical field of soil leachate sampling, in particular to a field deep soil leachate sampler. Background Art

[0002] Field soil leachate is a liquid formed after natural precipitation and farmland irrigation water penetrate deep into the soil layer, and the soil filters, absorbs and filters the water flow and the substances dissolved in it. The deep soil leachate in the field contains different organic substances. The nutrient content in the soil leachate can be measured to analyze and evaluate the soil properties, thereby providing a reliable basis for management planning such as farmland cultivation and fertilization.

[0003] In the prior art, when collecting and sampling soil leachate from deep in the field, the sampler is placed in the field hole. Since the sampler is large, the collection device cannot conveniently collect soil leachate from deep in the field, and the collection process is easily affected by impurities such as soil. In addition, most soil leachate collection is carried out by landfill. When the landfill depth is too large, the sampling device is not easy to be taken up. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art that it is not possible to conveniently collect soil leachate from deep in the field and that the collection process is easily affected by impurities such as soil, and to propose a deep field soil leachate sampler.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A field deep soil leachate sampler is designed, comprising a tube body, a plurality of through holes are opened on the tube body at equal intervals along the axial direction, a filter cloth layer is wound on the tube body, the filter cloth layer is located on the outside of the through holes, both sides of the filter cloth layer are connected with tie bands for fixing, one side of the bottom end of the tube body is connected with a water intake pipe, a filter membrane is connected in the water intake pipe, and an end cap is sleeved on one end of the water intake pipe.

[0007] Preferably, the tube body is a PVC transparent tube.

[0008] Preferably, the filter cloth layer is a gauze layer.

[0009] Preferably, a threaded opening is provided at the upper end of the tube body, and an extension rod is connected to the threaded opening.

[0010] Preferably, the extension rod is formed by splicing a plurality of connecting rods.

[0011] Preferably, the tube body is connected with a barrier mechanism for reducing the contact between debris and the filter cloth layer, the barrier mechanism comprises a first fixed ring, the first fixed ring is fixedly connected to the tube body, the upper end of the first fixed ring is provided with a plurality of slots at equal intervals along the axial direction, a movable ring is slidably connected to the tube body, the bottom end of the movable ring is provided with a plurality of baffles at equal intervals along the axial direction, the bottom end of each baffle is snapped into the corresponding slot, gaps are provided between adjacent baffles, and the filter cloth layer is located between the movable ring and the first fixed ring.

[0012] Preferably, a scraping mechanism is connected to the tube body, and the scraping mechanism includes a liquid collecting bucket, which is fixedly connected to the tube body, and the liquid collecting bucket is located below the through hole. A second fixing ring is fixedly connected to the liquid collecting bucket, and springs are fixedly connected to both sides of the bottom end of the second fixing ring. One end of each of the springs is fixedly connected to the same movable plate, and a fixing rod is fixedly connected to the upper end of the movable plate. The fixing rod passes through the liquid collecting bucket, and a plurality of ring plates are connected to the fixing rod at equal intervals along the length direction, and each of the ring plates is in contact with the inner wall of the tube body.

[0013] Preferably, the fixing rod and the ring plate are an integral structure.

[0014] The invention provides a field deep soil leachate sampler, which has the following beneficial effects:

[0015] By placing the pipe body in the hole drilled by the drilling rig, the soil leachate in the hole immerses the filter cloth layer. After the soil leachate contacts the filter cloth layer, the filter cloth layer filters the soil impurities in the soil leachate. The filtered soil leachate passes through the through hole into the pipe body, moves downward along the inner wall of the pipe body, and gathers at the bottom of the pipe body, which is convenient for collecting and sampling the soil leachate. The soil impurities in the soil leachate are filtered through the filter cloth layer, reducing the influence of soil impurities on the soil leachate and improving the sampling quality of the soil leachate. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of the structure of a field deep soil leachate sampler proposed by the present invention Figure 1 ;

[0017] Figure 2 A schematic diagram of the structure of a field deep soil leachate sampler proposed by the present invention Figure 2 ;

[0018] Figure 3 This is a schematic cross-sectional view of a field deep soil leachate sampler proposed by the present invention;

[0019] Figure 4The present invention is a schematic structural diagram of a scraping mechanism in a field deep soil leachate sampler.

[0020] In the figure: 1. tube body; 2. through hole; 3. filter cloth layer; 4. tie; 5. water intake pipe; 6. end cover; 7. filter membrane; 8. threaded port; 9. extension rod; 10. blocking mechanism; 11. scraper mechanism; 101. first fixed ring; 102. movable ring; 103. baffle; 111. liquid collecting bucket; 112. second fixed ring; 113. spring; 114. movable plate; 115. ring plate; 116. fixed rod. DETAILED DESCRIPTION

[0021] 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 the embodiments.

[0022] Example 1: Reference Figure 1-2 A field deep soil leachate sampler comprises a tube body 1, which is a PVC transparent tube. The tube body 1 is 1m long. A plurality of through holes 2 are opened on the tube body 1 at equal intervals along the axial direction. The through holes 2 are evenly distributed at 60cm to 80cm of the tube body 1. A filter cloth layer 3 is wound on the tube body 1. The filter cloth layer 3 is a gauze layer. The filter cloth layer 3 is located on the outside of the through holes 2. Both sides of the filter cloth layer 3 are connected with tie bands 4 for fixing. The tie bands 4 are metal tie bands. A water intake pipe 5 is connected to one side of the bottom end of the tube body 1. A filter membrane 7 is connected to the water intake pipe 5. An end cap 6 is sleeved on one end of the water intake pipe 5. A threaded opening 8 is opened on the upper end of the tube body 1. An extension rod 9 is connected to the threaded opening 8. The extension rod 9 is formed by splicing a plurality of connecting rods. The rod diameter of the extension rod 9 is the same as the diameter of the tube body 1. The extension rod 9 is provided with anti-slip patterns.

[0023] Working process:

[0024] The filter cloth layer 3 is evenly wound on the tube body 1 to cover the through hole 2, and then the filter cloth layer 3 is fixed by the tie 4 to prevent the filter cloth layer 3 from falling off the tube body 1. The filter cloth layer 3 is fixed by the tie 4, and the tie 4 is easy to bundle, so that the filter cloth layer 3 is easy to replace;

[0025] The pipe body 1 is placed in the hole drilled by the drilling rig, and the soil leachate in the hole immerses the filter cloth layer 3. After the soil leachate contacts the filter cloth layer 3, the filter cloth layer 3 filters the soil impurities in the soil leachate. The filtered soil leachate passes through the through hole 2 and enters the pipe body 1, moves downward along the inner wall of the pipe body 1, and gathers at the bottom of the pipe body 1, which is convenient for collecting and sampling the soil leachate. The soil impurities in the soil leachate are filtered through the filter cloth layer 3, reducing the influence of the soil impurities on the soil leachate and improving the sampling quality of the soil leachate.

[0026] After the soil leachate is collected sufficiently, the pipe body 1 is pulled out, the end cap 6 is removed, and the soil leachate in the pipe body 1 is released from the water intake pipe 5. During the process of releasing the soil leachate from the water intake pipe 5, the soil leachate contacts the filter membrane 7, and the filter membrane 7 filters the soil leachate. The filtered soil leachate is released from the outlet of the water intake pipe 5. When the release speed of the soil leachate from the water intake pipe 5 is slow, an additional diversion pipe can be connected for drainage to accelerate the release of the soil leachate.

[0027] Since the length of the pipe body 1 is limited, according to the needs of soil leachate in soil layers of different depths, multiple connecting rods are spliced ​​into an extension rod 9, and the extension rod 9 is connected to the threaded port 8. The extension rod 9 is in a straight line with the pipe body 1, and the length of the pipe body 1 is lengthened to facilitate the collection of soil leachate in different depths.

[0028] Example 2: When the pipe body 1 is placed in the hole drilled by the drilling rig to collect soil leachate, there are blocky soil debris in the hole, and the blocky soil debris in the hole contacts the filter cloth layer 3. The contact between the filter cloth layer 3 and the blocky soil debris is squeezed and sealed, thereby reducing the filtration area of ​​the soil leachate, thereby reducing the collection speed of the soil leachate. Figure 2 As another preferred embodiment of the present invention, the difference from Embodiment 1 is that a blocking mechanism 10 for reducing the contact between debris and the filter cloth layer 3 is connected to the tube body 1, and the blocking mechanism 10 includes a first fixed ring 101, which is fixedly connected to the tube body 1, and a plurality of slots are provided at equal intervals at the upper end of the first fixed ring 101 along the axis direction, and a movable ring 102 is slidably connected to the tube body 1, and a plurality of baffles 103 are provided at equal intervals at the bottom end of the movable ring 102 along the axis direction, and the bottom end of each baffle 103 is snapped into the corresponding slot, and a gap is provided between adjacent baffles 103, and the filter cloth layer 3 is located between the movable ring 102 and the first fixed ring 101.

[0029] Working process:

[0030] After the filter cloth layer 3 is fixed by the tie 4, the movable ring 102 is sleeved on the tube body 1, and the tube body 1 slides downward to drive the plurality of baffles 103 to move, and the baffles 103 move downward for a certain distance and then snap into the slot, thereby lowering the movable ring 102 to limit and fix it, and the filter cloth layer 3 is located between the movable ring 102 and the first fixed ring 101, and the plurality of baffles 103 are located on the outside of the filter cloth layer 3;

[0031] When the pipe body 1 is placed in the hole drilled by the drilling rig to collect soil leachate, a number of baffles 103 block the block soil debris in the hole, and the soil leachate passes through the gaps between the baffles 103 and contacts the filter cloth layer 3, and the filter cloth layer 3 filters the soil leachate. After the baffles 103 block the block soil debris in the hole, the block soil debris is prevented from contacting the filter cloth layer 3, and the filter cloth layer 3 will not be squeezed and blocked, thereby ensuring the filtering area of ​​the filter cloth layer 3 for the soil leachate, thereby not reducing the filtering speed of the filter cloth layer 3 for the soil leachate.

[0032] Embodiment 3: The filter cloth layer 3 filters the soil impurities in the soil leachate. The filtered soil leachate passes through the through hole 2 and enters the tube body 1, moves downward along the inner wall of the tube body 1, and gathers at the bottom of the tube body 1. After the soil leachate moves downward along the inner wall of the tube body 1, a lot of debris will remain on the inner wall of the tube body 1. As the debris accumulates on the inner wall of the tube body 1, the through hole 2 will be sealed to a certain extent, thereby affecting the soil leachate from passing through the through hole 2 into the tube body 1. Figure 4 As another preferred embodiment of the present invention, the difference from Embodiment 1 is that a scraper mechanism 11 is connected to the tube body 1, and the scraper mechanism 11 includes a liquid collecting bucket 111, which is fixedly connected to the tube body 1, and the liquid collecting bucket 111 is located below the through hole 2. A second fixed ring 112 is fixedly connected to the liquid collecting bucket 111, and springs 113 are fixedly connected to both sides of the bottom end of the second fixed ring 112, and one end of each spring 113 is fixedly connected to the same movable plate 114, and a fixed rod 116 is fixedly connected to the upper end of the movable plate 114, and the fixed rod 116 passes through the liquid collecting bucket 111, and a plurality of ring plates 115 are connected to the fixed rod 116 at equal intervals along the length direction, and each ring plate 115 is in contact with the inner wall of the tube body 1, and the fixed rod 116 and the ring plate 115 are an integral structure.

[0033] Working process:

[0034] The filtered soil leachate passes through different through holes 2 and enters the pipe body 1. The soil leachate moves downward and enters the liquid collecting bucket 111. The liquid collecting bucket 111 collects the soil leachate and releases it from the bottom. The released soil leachate impacts the movable plate 114. The movable plate 114 moves downward after being impacted. The movable plate 114 moves downward and pulls the spring 113. The spring 113 generates elastic force after being pulled. Since the soil leachate released from the bottom of the liquid collecting bucket 111 has different flow rates, the movable plate 114 14 is subjected to different degrees of impact. Under the combined effect of liquid impact and the elastic force of the spring 113, the movable plate 114 swings back and forth in the vertical direction, the movable plate 114 drives the fixed rod 116 to move, and the fixed rod 116 drives the plurality of ring plates 115 to move back and forth in the vertical direction. During the reciprocating movement in the vertical direction, the plurality of ring plates 115 scrape and clean the inner wall of the pipe body 1, reducing the accumulation of debris on the inner wall of the pipe body 1, thereby not causing blockage to the through hole 2, and further not affecting the soil leachate from passing through the through hole 2 into the pipe body 1.

[0035] 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 according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A field deep soil leachate sampler, characterized in that: It comprises a tube body (1), wherein: The tube body (1) is provided with a plurality of through holes (2) at equal intervals along the axis direction; a filter cloth layer (3) is wound around the tube body (1); the filter cloth layer (3) is located outside the through hole (2); both sides of the filter cloth layer (3) are connected with tie bands (4) for fixing; one side of the bottom end of the tube body (1) is connected with a water intake pipe (5); a filter membrane (7) is connected inside the water intake pipe (5); and an end cap (6) is sleeved on one end of the water intake pipe (5).

2. The field deep soil leachate sampler according to claim 1, characterized in that: The tube body (1) is a PVC transparent tube.

3. The field deep soil leachate sampler according to claim 1, characterized in that: The filter cloth layer (3) is a gauze layer.

4. The field deep soil leachate sampler according to claim 1, characterized in that: A threaded opening (8) is provided at the upper end of the tube body (1), and an extension rod (9) is connected to the threaded opening (8).

5. The field deep soil leachate sampler according to claim 4, characterized in that: The extension rod (9) is formed by splicing a plurality of connecting rods.

6. The field deep soil leachate sampler according to claim 1, characterized in that: The tube body (1) is connected to a blocking mechanism (10) for reducing contact between debris and the filter cloth layer (3), the blocking mechanism (10) comprising a first fixed ring (101), the first fixed ring (101) being fixedly connected to the tube body (1), a plurality of slots being provided at equal intervals at the upper end of the first fixed ring (101) along the axis direction, a movable ring (102) being slidably connected to the tube body (1), a plurality of baffles (103) being provided at equal intervals at the bottom end of the movable ring (102) along the axis direction, the bottom end of each baffle (103) being clamped to the corresponding slot, a gap being provided between adjacent baffles (103), and the filter cloth layer (3) being located between the movable ring (102) and the first fixed ring (101).

7. The field deep soil leachate sampler according to claim 1, characterized in that: A scraping mechanism (11) is connected to the tube body (1), and the scraping mechanism (11) comprises a liquid collecting hopper (111). The liquid collecting hopper (111) is fixedly connected to the tube body (1), and the liquid collecting hopper (111) is located below the through hole (2). A second fixing ring (112) is fixedly connected to the liquid collecting hopper (111), and springs (113) are fixedly connected to both sides of the bottom end of the second fixing ring (112). One end of each spring (113) is fixedly connected to the same movable plate (114), and a fixing rod (116) is fixedly connected to the upper end of the movable plate (114). The fixing rod (116) passes through the liquid collecting hopper (111), and a plurality of ring plates (115) are connected to the fixing rod (116) at equal intervals along the length direction, and each of the ring plates (115) is in contact with the inner wall of the tube body (1).

8. The field deep soil leachate sampler according to claim 7, characterized in that: The fixing rod (116) and the ring plate (115) are an integral structure.

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