Deep soil leachate sampling device

Abstract

The utility model provides a deep soil leachate sampling device which comprises a sampling mechanism, a lengthening mechanism, a filtering mechanism and a top cover, the sampling mechanism comprises a sampling pipe, a plurality of percolation holes are formed in the middle of the sampling pipe, the lengthening mechanism or the top cover is detachably assembled in a threaded connection hole in the upper portion of the sampling pipe, and a liquid storage cavity is formed in the lower end of the sampling pipe. A liquid outlet pipe is arranged on the side wall of the lower portion of the liquid storage cavity, and a liquid outlet cap is detachably assembled on the liquid outlet pipe. The lengthening mechanism comprises a lengthening pipe, an upper screw hole is formed in one end of the lengthening pipe, a lower screw head is arranged at the other end of the lengthening pipe, and a top cover is detachably assembled in the upper screw hole; the filtering mechanism comprises a filter screen sleeved outside the percolation hole in the middle of the sampling tube; and the upper end and the lower end of the filter screen are fixed on the tube wall of the sampling tube through ribbons. According to the device, impurities are prevented from entering a sample through double-layer filtration of the filter screen and the percolation holes, the sampling depth is convenient to control and the device is convenient to take out by arranging the lengthening pipe, and the problems that the percolate sampling difficulty is large, the sampling device is difficult to take out, and the sample contains more impurities are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of soil detection, in particular to a deep soil leachate sampling device. Background Art

[0002] Field soil leachate is a liquid formed when natural precipitation and irrigation water penetrate deep into the soil, filtering and absorbing the water and the substances dissolved in it. Deep field soil leachate contains various organic substances. Measuring the nutrient content of soil leachate can be used to analyze and evaluate soil properties, providing a reliable basis for management planning such as farmland cultivation and fertilization.

[0003] The use of existing collection devices is limited by the soil collection depth requirements, and it is impossible to conveniently collect soil leachate deep in the field. The collection process is easily affected by impurities such as soil. In addition, soil leachate collection is mostly carried out by landfill. After the collection is completed, it is necessary to dig out the soil again to remove the sampling device. When the landfill depth is too large, the sampling device is not easy to remove and is easily damaged.

[0004] Therefore, there is an urgent need for a deep soil leachate sampling device to facilitate deep soil leachate sampling. Summary of the Invention

[0005] The technical problem to be solved by the utility model is to provide a deep soil leachate sampling device to solve the problems of the current difficulty in sampling deep soil leachate in the field, the difficulty in removing the sampling device after collecting the soil leachate, and the large amount of impurities in the sample.

[0006] The utility model provides a deep soil leachate sampling device, comprising a sampling mechanism, an extension mechanism, a filtering mechanism and a top cover, wherein:

[0007] The sampling mechanism includes a sampling tube, a plurality of percolation holes are provided in the middle of the sampling tube, a threaded connection hole is provided on the upper part of the sampling tube, an extension mechanism or a top cover can be detachably mounted in the threaded connection hole, a liquid storage cavity is provided at the lower end of the sampling tube, a liquid outlet pipe is provided on the lower side wall of the liquid storage cavity, and a liquid outlet cap can be detachably mounted on the liquid outlet pipe;

[0008] The extension mechanism includes an extension tube, one end of which is provided with an upper screw hole and the other end of which is provided with a lower screw head. Several extension mechanisms are detachably connected end to end, and a top cover is detachably mounted in the upper screw hole at the top end.

[0009] The filtering mechanism comprises a filter screen which is sleeved outside the percolation hole in the middle of the sampling tube, and the upper and lower ends of the filter screen are fixed to the tube wall of the sampling tube by means of cable ties.

[0010] Preferably, a sedimentation tank is provided at the lower end of the liquid storage chamber.

[0011] Preferably, the sedimentation tank is conical, and the sedimentation tank thread is assembled at the lower end of the liquid storage cavity.

[0012] Preferably, a group of grooves are provided on the wall of the sampling tube, and the grooves are respectively located on the upper and lower sides of the infiltration hole.

[0013] Preferably, the filter screen is cylindrical, and is provided with sleeves at both ends, and the cable ties are provided in the sleeves.

[0014] Preferably, the liquid outlet cap is threadedly mounted on the liquid outlet pipe.

[0015] Working principle of the utility model: When using the deep soil leachate sampling device of the utility model, first insert the cable tie into the sleeves at both ends of the filter screen, put the cable tie and filter screen outside the percolation hole in the middle of the sampling tube, and tighten the cable tie to fix it in the annular groove on the wall of the sampling tube. Then, according to the sampling depth, select the appropriate number of extension mechanisms, connect them to the sampling mechanism in sequence, and install the top cover on the top. The entire device is buried vertically in the deep soil according to the sampling device. After collecting for a certain period of time, lift the device up to remove it from the soil, then open the liquid outlet cap, and the leachate sample flows out of the liquid outlet pipe, completing the sampling.

[0016] The beneficial effects of the present invention are as follows: The deep soil leachate sampling device of the present invention is provided with a percolation hole on the sampling tube and a filter screen is installed to filter and collect the leachate, reducing the sediment content. An annular groove is provided on the outer wall of the sampling tube to facilitate the fixing and limiting of the tie, preventing the tie and filter screen from slipping and preventing sediment from entering through the percolation hole. Secondly, a sedimentation tank is provided at the bottom of the sampling tube to further precipitate the sediment in the collected liquid, making the collected liquid clearer. The final sample is taken out through the liquid outlet pipe to prevent the liquid from being contaminated again. Furthermore, the sedimentation tank is threadedly mounted on the lower end of the liquid storage chamber to facilitate the disassembly and cleaning of the sedimentation tank. In addition, an extension tube is provided. According to the sampling requirements, the sampling depth of the sampling mechanism can be controlled by adjusting the number of extension tubes. At the same time, the upper end of the device is closer to the ground surface, making it easier to remove the entire device after sampling. The device solves the current problems of difficult sampling of deep soil leachate in the field, difficulty in removing the sampling device after collecting the soil leachate, and the large amount of impurities in the sample. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic structural diagram of the deep soil leachate sampling device of Example 1;

[0018] Figure 2 This is a schematic structural diagram of the deep soil leachate sampling device of Example 2;

[0019] Figure 3 It is a schematic diagram of the assembly structure of the sampling mechanism and the filtering mechanism;

[0020] Figure 4 It is a structural diagram of the sampling mechanism;

[0021] Figure 5 It is a structural diagram of the extension mechanism;

[0022] Figure 6 It is a structural diagram of the filtering mechanism;

[0023] Figure 7 Schematic diagram of the structure of the top cover.

[0024] In the figure: sampling mechanism 1, sampling tube 11, percolation hole 12, threaded connection hole 13, liquid storage chamber 14, liquid outlet pipe 15, liquid outlet cap 16, sedimentation tank 17, groove 18; extension mechanism 2, extension tube 21, upper screw hole 22, lower screw head 23; filtering mechanism 3, filter screen 31, cable tie 32, sleeve 33, top cover 4. DETAILED DESCRIPTION

[0025] In order to make the technical solution of the present invention easier to understand, the technical solution of the present invention is now clearly and completely described in conjunction with the accompanying drawings using specific embodiments.

[0026] Example 1:

[0027] like Figure 1 and Figures 3 to 7 As shown, the deep soil leachate sampling device of this embodiment includes a sampling mechanism 1, a filtering mechanism 3 and a top cover 4, wherein:

[0028] The sampling mechanism 1 includes a sampling tube 11, a plurality of percolation holes 12 are provided in the middle of the sampling tube 11, a threaded connection hole 13 is provided on the upper portion thereof, a top cover 4 is detachably mounted in the threaded connection hole 13, a liquid storage chamber 14 is provided at the lower end of the sampling tube 11, a liquid outlet pipe 15 is provided on the lower side wall of the liquid storage chamber 14, and a liquid outlet cap 16 is detachably mounted on the liquid outlet pipe 15;

[0029] The filtering mechanism 3 includes a filter screen 31 , which is sleeved outside the percolation hole 12 in the middle of the sampling tube 11 , and the upper and lower ends of the filter screen 31 are fixed to the tube wall of the sampling tube 11 by tie bands 32 .

[0030] Example 2:

[0031] like Figures 2 to 7 As shown, the deep soil leachate sampling device of this embodiment includes a sampling mechanism 1, an extension mechanism 2, a filtering mechanism 3 and a top cover 4, wherein:

[0032] The sampling mechanism 1 includes a sampling tube 11, a plurality of percolation holes 12 are provided in the middle of the sampling tube 11, a threaded connection hole 13 is provided in the upper portion thereof, an extension mechanism 2 is detachably mounted in the threaded connection hole 13, a liquid storage chamber 14 is provided at the lower end of the sampling tube 11, a liquid outlet pipe 15 is provided on the lower side wall of the liquid storage chamber 14, a liquid outlet cap 16 is detachably mounted on the liquid outlet pipe 15, and the liquid outlet cap 16 is threadably mounted on the liquid outlet pipe 15; a sedimentation tank 17 is provided at the lower end of the liquid storage chamber 14; the sedimentation tank 17 is conical and threadably mounted on the lower end of the liquid storage chamber 14; a group of grooves 18 are provided on the wall of the sampling tube 11, and the grooves 18 are respectively located on the upper and lower sides of the percolation hole 12;

[0033] The extension mechanism 2 includes an extension tube 21, one end of which is provided with an upper screw hole 22, and the other end of which is provided with a lower screw head 23. The extension mechanism 2 can be provided with one or more extension mechanisms 2, and a plurality of the extension mechanisms 2 can be detachably connected end to end and connected to the upper end of the sampling mechanism 1, and the top cover 4 can be detachably fitted in the upper screw hole 22 at the upper end;

[0034] The filtering mechanism 3 includes a filter screen 31, which is sleeved outside the percolation hole 12 in the middle of the sampling tube 11, and its upper and lower ends are fixed to the tube wall of the sampling tube 11 by cable ties 32; the filter screen 31 is cylindrical, and its two ends are respectively provided with sleeves 33, and the cable ties 32 are arranged in the sleeves 33.

[0035] It should be noted that the embodiments described herein are only some embodiments of the present invention, not all implementations of the present invention. The embodiments are merely illustrative and serve only to provide a more intuitive and clear way to understand the content of the present invention, rather than to limit the technical solutions described in the present invention. Without departing from the concept of the present invention, all other implementation methods that can be thought of by ordinary technicians in this field without creative work, as well as other simple replacements and various variations of the technical solutions of the present invention, are within the scope of protection of the present invention.

Claims

1. A deep soil leachate sampling device, characterized in that: It comprises a sampling mechanism (1), an extension mechanism (2), a filtering mechanism (3) and a top cover (4), wherein: The sampling mechanism (1) comprises a sampling tube (11), a plurality of percolation holes (12) are provided in the middle of the sampling tube (11), a threaded connection hole (13) is provided on the upper portion thereof, an extension mechanism (2) or a top cover (4) can be detachably mounted in the threaded connection hole (13), a liquid storage cavity (14) is provided at the lower end of the sampling tube (11), a liquid outlet pipe (15) is provided on the lower side wall of the liquid storage cavity (14), and a liquid outlet cap (16) can be detachably mounted on the liquid outlet pipe (15); The extension mechanism (2) includes an extension tube (21), one end of the extension tube (21) is provided with an upper screw hole (22), and the other end thereof is provided with a lower screw head (23), and a plurality of the extension mechanisms (2) are detachably connected end to end, and a top cover (4) is detachably mounted in the upper screw hole (22) at the top end; The filtering mechanism (3) comprises a filter screen (31), which is sleeved outside the percolation hole (12) in the middle of the sampling tube (11), and has its upper and lower ends fixed to the tube wall of the sampling tube (11) by means of tie bands (32).

2. The deep soil leachate sampling device according to claim 1, characterized in that: A sedimentation tank (17) is provided at the lower end of the liquid storage chamber (14).

3. The deep soil leachate sampling device according to claim 2, characterized in that: The sedimentation tank (17) is conical and is threadedly mounted on the lower end of the liquid storage chamber (14).

4. The deep soil leachate sampling device according to claim 1, characterized in that: A group of grooves (18) are provided on the wall of the sampling tube (11), and the grooves (18) are respectively located on the upper and lower sides of the percolation hole (12).

5. The deep soil leachate sampling device according to claim 1, characterized in that: The filter screen (31) is cylindrical, and is provided with sleeves (33) at both ends thereof, and the cable tie (32) is arranged in the sleeves (33).

6. The deep soil leachate sampling device according to claim 1, characterized in that: The liquid outlet cap (16) is threadedly mounted on the liquid outlet pipe (15).

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