Soil sampling device and use method thereof
By designing a soil sampling device including soil sampling components and sample screening components, and using vibrating filters for screening, the problem of difficulty in removing impurities in traditional soil sampling methods is solved, the fine fragmentation and uniformity of soil samples are achieved, and the accuracy of analysis is improved.
Patent Information
- Application Number
- CN202411798584.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-09
- Publication Date
- 2025-03-18
AI Technical Summary
Traditional soil sampling methods are difficult to effectively remove impurities such as stones, soil blocks and other impurities in soil samples, resulting in the samples being not fine and uneven, increasing the difficulty and cost of subsequent analysis.
A soil sampling device is designed, including a soil sampling component and a sample screening component. Screening through vibrating filters to remove impurities in the soil sample, making the sample more fine and even.
It realizes efficient screening of soil samples, removes impurities, improves the fineness and uniformity of the samples, thereby improving the accuracy and reliability of subsequent analysis.
Smart Images
Figure CN119643196A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of soil sampling, and relates to a soil sampling device and a use method thereof. Background Art
[0002] In the technical field of soil sampling, traditional soil sampling methods have many shortcomings. For example, traditional soil sampling devices may not be able to effectively crush and screen soil samples, resulting in impurities such as stones and clods in the obtained soil samples. Soil sampling is a vital link in many fields such as soil science, agriculture, environmental monitoring, and geological exploration. Through the analysis of soil samples, we can understand the physical and chemical properties, fertility status, degree of pollution, and microbial community structure of the soil, providing a scientific basis for agricultural production, environmental protection, and geological research.
[0003] Traditional soil sampling methods also require manual screening and processing after sampling to remove impurities such as stones and clods in the soil. This process is not only cumbersome and time-consuming, but also prone to human errors. At the same time, for soil samples containing a large number of fine particles, the difficulty and cost of manual screening will increase significantly. In addition, traditional soil sampling devices may be complicated to operate and inefficient when used, and cannot meet the needs of quickly and accurately obtaining soil samples.
[0004] In view of the above problems, in the existing technology, soil sampling usually requires manual digging or the use of simple sampling tools. These methods are not only time-consuming and labor-intensive, but also difficult to ensure the uniformity and representativeness of the sampling. Since the soil contains particles and impurities of different sizes, it is easy to clog the sampling tools and affect the sampling effect; in addition, the traditional sampling method also requires manual screening and processing after sampling, which further increases the workload and time cost. The traditional soil sampling technology faces many challenges and shortcomings in practical applications and urgently needs to be improved and optimized. Summary of the invention
[0005] In order to solve the problem that soil samples containing a large number of fine particles significantly increase the difficulty and cost of manual screening, the present application provides a soil sampling device and a method of using the same. The device specifically includes a soil sampling component for soil sampling and a sample screening component for screening soil samples. Through ingenious structural design and working principle, the finely divided soil sample is screened through a vibrating filter sheet. This can not only remove impurities such as stones and clods in the soil sample, but also make the soil sample more finely divided and uniform, thereby improving the accuracy and reliability of subsequent analysis.
[0006] In a first aspect, the present invention provides a soil sampling device, which adopts the following technical solution: A soil sampling device comprises a soil sampling component for soil sampling and a sample screening component for screening soil samples, wherein the sample screening component comprises a hollow box in the shape of an annular ring, a soil crushing box arranged inside the hollow box, a plurality of first supporting legs fixedly connected between the hollow box and an existing soil drilling device, and a plurality of second supporting legs fixedly connected between the hollow box and the soil crushing box; a plurality of small vibrators are fixedly installed in the inner cavity of the hollow box.
[0007] By adopting the above technical solution, the finely crushed soil samples are transported to the soil crushing box, and a number of small vibrators in the hollow box drive the soil crushing box to vibrate through a number of supporting legs. The finely crushed soil samples are screened by the vibrating sample screening component, so that the staff can extract more finely crushed and stone-free soil samples.
[0008] Optionally, the soil sampling component includes a long straight cylinder rotatably mounted on the bottom of the soil crushing box and a lantern-shaped drill bit coaxially fixed to the bottom end of the long straight cylinder; the long straight cylinder is arranged at the center position of the bottom of the soil crushing box along the vertical direction, and the parts where the long straight cylinder is combined with the soil crushing box are connected to each other, and the parts where the long straight cylinder is combined with the lantern-shaped drill bit are connected to each other.
[0009] By adopting the above technical solution, the rotating long straight cylinder drives the lantern-shaped drill bit to rotate synchronously, the existing soil drilling equipment drives the rotating lantern-shaped drill bit to drill into the soil that needs to be sampled, and the spiral blades on the outer surface of the long straight cylinder assist the lantern-shaped drill bit to drill into the soil that needs to be sampled.
[0010] Optionally, the outer circumferential surface of the long straight tube is provided with an auxiliary component, and the auxiliary component includes a spiral blade fixedly installed on the circumference of the long straight tube; the spiral blade is arranged along the length direction of the long straight tube, and the spiral blade is spirally arranged in a clockwise direction.
[0011] By adopting the above technical solution, the long straight cylinder drives the lantern-shaped drill bit to rotate synchronously, the existing soil drilling equipment drives the rotating lantern-shaped drill bit to drill into the soil that needs to be sampled, and the spiral blades on the outer surface of the long straight cylinder assist the lantern-shaped drill bit to drill into the soil that needs to be sampled.
[0012] Optionally, the lantern-shaped drill bit is shaped like an inverted cone, and an intercepting component is provided on the circumferential side of the lantern-shaped drill bit, and the intercepting component includes a plurality of steel wire strands fixedly connected between the tip of the lantern-shaped drill bit and the circumferential edge of the end of the lantern-shaped drill bit.
[0013] By adopting the above technical solution, the inclined steel strands can prevent large rocks and clods of earth from drilling into the long straight tube through the lantern-shaped drill bit, thereby preventing rocks and clods of earth from blocking the port at the bottom of the long straight tube and damaging the soil sampling device.
[0014] Optionally, a conveying component is provided in the long straight cylinder, and the conveying component includes a rotating shaft rotatably installed in the long straight cylinder, and an auger fixed around the outer circumference of the rotating shaft along the length direction of the rotating shaft; the long straight cylinder is coaxially arranged with the rotating shaft, and the rotating shaft is arranged along the length direction of the long straight cylinder. The bottom end of the rotating shaft is rotatably installed on the end of the lantern-shaped drill bit, and the outer circumference of the auger is arranged to fit the inner circumference of the long straight cylinder.
[0015] By adopting the above technical solution, the steel wire rope is prevented as much as possible from large stones and soil blocks being drilled into the long straight cylinder through the lantern-shaped drill bit, and the finely crushed soil sample enters the long straight cylinder through the lantern-shaped drill bit. The auger in the long straight cylinder drives the sample to be transported to the top of the long straight cylinder, and the finely crushed soil sample is transported to the inside of the soil crushing box.
[0016] Optionally, a driving component is provided above the soil crushing box, and the driving component includes a circular plate arranged above the soil crushing box, a motor fixedly mounted on the top of the circular plate, a gear ring rotatably mounted on the bottom of the circular plate, a flat plate coaxially fixed to the bottom of the gear ring, a plurality of guide shafts connected between the bottom of the flat plate and the top of the long straight cylinder, a gear 1 coaxially fixed to the output shaft of the motor, and a gear 2 meshing together between the gear ring and the gear 1; the rotating shaft is fixedly connected to the output shaft of the motor, the meshing teeth of the gear ring are located on the inner circumference of the gear ring, and the circular plate is fixedly connected to the existing soil drilling equipment.
[0017] By adopting the above technical solution, the motor is powered on and started, and drives gear one to rotate synchronously. Gear one drives the gear ring to rotate in the opposite direction through gear two. The flat plate at the bottom of the gear ring drives the long straight cylinder to rotate through the guide shaft. The rotating long straight cylinder drives the lantern-shaped drill bit to rotate synchronously. The existing soil drilling equipment drives the rotating lantern-shaped drill bit to drill into the soil that needs to be sampled. The motor is powered on and started, and drives the auger to rotate through the rotating shaft. The rotating auger is used to transport fine soil samples.
[0018] Optionally, a connecting component is provided between the soil crushing box and the long straight tube, and the connecting component includes a slot opened at the bottom of the soil crushing box, a trumpet ring installed at the bottom of the soil crushing box through the slot, and a buffer cloth fixedly connected between the top of the long straight tube and the top of the trumpet ring; the top of the long straight tube passes through the trumpet ring, and the buffer cloth is rotatably installed at the top of the long straight tube, and the shape of the trumpet ring is an inverted trumpet shape.
[0019] By adopting the above technical solution, a buffer cloth is connected between the long straight cylinder and the vibrating soil crushing box, which can avoid as much as possible that several small vibrators in the hollow box will drive the long straight cylinder to vibrate, so that the soil sampling component for soil sampling and the sample screening component for screening soil samples become two independent structures, thereby increasing the service life of the independent soil sampling component for soil sampling.
[0020] Optionally, the sample screening component also includes a filter sheet fixedly connected between the outer circumference of the horn ring and the inner circumference of the soil crushing box, and a valve arranged at the bottom of the soil crushing box; the filter sheet is a sheet structure in the shape of a circular ring composed of a steel wire filter.
[0021] By adopting the above technical solution, the finely crushed soil sample is screened through the vibrating filter screen, and the agglomerated stones and soil blocks are intercepted above the filter screen. The bottom of the soil crushing box can take out the soil sample under the filter screen through the valve.
[0022] In a second aspect, the present invention provides a method for using a soil sampling device, which is used to operate the above-mentioned soil sampling device, comprising the following steps: S1, the driving component drives the long straight cylinder to rotate through the guide shaft; S2. The rotating long straight cylinder drives the lantern-shaped drill bit to rotate synchronously, and the existing soil drilling equipment drives the soil sampling component to drill into the soil to be sampled, and the auxiliary component assists the lantern-shaped drill bit to drill into the soil to be sampled; S3, the interception component prevents large stones and soil blocks from entering the long straight cylinder through the lantern-shaped drill bit as much as possible, and the finely crushed soil sample enters the long straight cylinder through the soil sampling component, and the conveying component in the long straight cylinder drives the sample to be conveyed to the top of the long straight cylinder; S4. The finely crushed soil sample is transported to the interior of the soil crushing box, and several small vibrators in the hollow box drive the soil crushing box to vibrate; S5. The finely crushed soil sample is screened through a vibrating filter, and the agglomerated stones and soil blocks are intercepted above the filter. The soil sample under the filter can be taken out through a valve at the bottom of the soil crushing box.
[0023] By adopting the above technical solution, the motor is powered on and started, and drives gear one to rotate synchronously. Gear one drives the gear ring to rotate in the opposite direction through gear two. The motor is powered on and started, and drives the auger to rotate forward through the rotating shaft, so that the long straight cylinder and the auger rotate in the opposite direction, thereby achieving the effect of conveying finely crushed soil samples. The finely crushed soil samples are screened by the vibrating filter mesh, and the agglomerated stones and soil blocks are intercepted above the filter mesh. The bottom of the soil crushing box can take out the soil sample under the filter mesh through the valve.
[0024] In summary, the present application includes at least one of the following beneficial technical effects: 1. The finely crushed soil samples are transported to the soil crushing box. Several small vibrators in the hollow box drive the soil crushing box to vibrate through several legs. The finely crushed soil samples are screened by the vibrating sample screening components, so that the staff can extract more finely crushed soil samples without stones; 2. The steel wire strands should try to prevent large rocks and soil blocks from entering the long straight cylinder through the lantern-shaped drill bit. The finely crushed soil samples enter the long straight cylinder through the lantern-shaped drill bit. The auger in the long straight cylinder drives the samples to the top of the long straight cylinder, and the finely crushed soil samples are transported to the inside of the soil crushing box. 3. A buffer cloth is connected between the long straight cylinder and the vibrating soil crushing box, which can prevent the several small vibrators in the hollow box from driving the long straight cylinder to vibrate, so that the soil sampling component for soil sampling and the sample screening component for screening soil samples become two independent structures, thereby increasing the service life of the soil sampling component for soil sampling. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] Figure 1 It is a structural schematic diagram of a soil sampling device in an embodiment of the present application.
[0026] Figure 2 It is a schematic diagram of an explosion of a soil sampling device in an embodiment of the present application.
[0027] Figure 3 It is a cross-sectional schematic diagram of the internal structure of the soil crushing box in the embodiment of the present application.
[0028] Explanation of the reference numerals: 11. hollow box; 12. soil crushing box; 13. support leg one; 14. support leg two; 15. long straight cylinder; 16. spiral blade; 17. lantern-shaped drill bit; 18. stranded wire; 19. rotating shaft; 20. auger; 21. circular plate; 22. support leg three; 23. motor; 24. gear ring; 25. flat plate; 26. guide shaft; 27. gear one; 28. gear two; 29. notch; 30. horn ring; 31. buffer cloth; 32. filter mesh. DETAILED DESCRIPTION
[0029] The following is combined with Figure 1-3 This application is described in further detail.
[0030] See attached Figure 1-3 The soil sampling device includes a hollow box 11 in a circular ring shape, and a small vibrator is fixedly installed in the inner cavity of the hollow box 11. A plurality of small vibrators are arranged at equal intervals around the axis of the hollow box 11. A soil crushing box 12 is arranged in the inner periphery of the hollow box 11, and a plurality of support legs 13 are fixedly connected between the hollow box 11 and the existing soil drilling equipment. A plurality of support legs 2 14 are fixedly connected between the hollow box 11 and the soil crushing box 12, so that the small vibrator in the hollow box 11 drives the soil crushing box 12 to vibrate through the plurality of support legs 2 14. A long straight cylinder 15 is rotatably installed at the bottom of the soil crushing box 12, and the long straight cylinder 15 is arranged at the center of the bottom of the soil crushing box 12 along the vertical direction, and the long straight cylinder 15 is connected to the part where the soil crushing box 12 is combined.
[0031] See attached Figure 1-3 The outer circumferential surface of the long straight tube 15 is fixed with a spiral blade 16, and the bottom end of the long straight tube 15 is coaxially fixed with a lantern-shaped drill bit 17, and the portion where the long straight tube 15 and the lantern-shaped drill bit 17 are combined is connected. The spiral blade 16 is arranged along the length direction of the long straight tube 15, and the spiral blade 16 is spirally arranged in a clockwise direction. The shape of the lantern-shaped drill bit 17 is an inverted cone, and a steel strand 18 is fixedly connected between the circumferential edge of the tip of the lantern-shaped drill bit 17 and the circumferential edge of the end of the lantern-shaped drill bit 17. The steel strand 18 is arranged in a plurality of directions with the axis of the lantern-shaped drill bit 17 as the circumferential direction, so as to avoid large stones and soil blocks from drilling into the long straight tube 15 through the lantern-shaped drill bit 17, causing the stones and soil blocks to block the port at the bottom of the long straight tube 15.
[0032] See attached Figure 1-3 A rotating shaft 19 is rotatably mounted on the inner side of the long straight cylinder 15. The rotating shaft 19 is arranged along the length direction of the long straight cylinder 15, and the long straight cylinder 15 is arranged coaxially with the rotating shaft 19. The bottom end of the rotating shaft 19 is rotatably mounted on the end of the lantern-shaped drill bit 17. A screw 20 is fixed around the circumference of the rotating shaft 19 along the direction of its own length. The outer circumference of the screw 20 is fitted with the inner circumference of the long straight cylinder 15. The top and bottom of the screw 20 exceed the top and bottom of the long straight cylinder 15. A circular plate 21 is horizontally arranged above the soil crushing box 12. A plurality of supporting legs 22 are vertically fixed on the top of the circular plate 21. The circular plate 21 is fixedly connected to the existing soil drilling equipment through the supporting legs 22. A motor 23 is fixedly installed at the center position of the top of the circular plate 21.
[0033] See attached Figure 1-3 The output shaft of the motor 23 is vertically downwardly arranged, the rotating shaft 19 is fixedly connected to the output shaft of the motor 23, a gear ring 24 is rotatably mounted at the bottom of the circular plate 21, a flat plate 25 is coaxially fixed to the bottom of the gear ring 24, a plurality of guide shafts 26 are fixedly connected between the bottom of the flat plate 25 and the top of the long straight tube 15, so that the gear ring 24 drives the long straight tube 15 to rotate through the plurality of guide shafts 26. The meshing teeth of the gear ring 24 are located on the inner circumference of the gear ring 24, a gear 1 27 is coaxially fixed to the output shaft of the motor 23, a gear 2 28 is meshed between the gear ring 24 and the gear 1 27, so that the gear 1 27 drives the gear ring 24 to rotate through the gear 2 28.
[0034] See attached Figure 1-3A notch 29 is provided at the center of the bottom of the soil crushing box 12. A horn ring 30 is installed at the bottom of the soil crushing box 12 through the notch 29. The top of the long straight tube 15 passes through the top of the horn ring 30 in the vertical direction. A buffer cloth 31 in the shape of a circular ring is fixedly connected between the top of the long straight tube 15 and the top of the horn ring 30. The buffer cloth 31 is rotatably installed on the top of the long straight tube 15. The shape of the horn ring 30 is an inverted horn shape. A filter sheet 32 is fixedly connected between the outer circumference of the top of the horn ring 30 and the inner circumference of the soil crushing box 12. The filter sheet 32 is a sheet structure in the shape of a circular ring composed of a steel wire filter. A valve is provided at the bottom of the soil crushing box 12. The soil sample under the filter sheet 32 can be taken out through the valve at the bottom of the soil crushing box 12.
[0035] A method for using a soil sampling device, operating the soil sampling device, comprises the following steps: S1, the motor 23 is powered on and starts to drive the gear 1 27 to rotate synchronously, the gear 1 27 drives the gear ring 24 to rotate in the opposite direction through the gear 2 28, and the flat plate 25 at the bottom of the gear ring 24 drives the long straight cylinder 15 to rotate through the guide shaft 26; S2, the rotating long straight cylinder 15 drives the lantern-shaped drill bit 17 to rotate synchronously, and the existing soil drilling equipment drives the rotating lantern-shaped drill bit 17 to drill into the soil to be sampled, and the spiral blades 16 on the outer circumference of the long straight cylinder 15 assist the lantern-shaped drill bit 17 to drill into the soil to be sampled; S3, the inclined steel strand 18 tries to prevent large rocks and soil blocks from entering the long straight cylinder 15 through the lantern-shaped drill bit 17, and the finely crushed soil sample enters the long straight cylinder 15 through the lantern-shaped drill bit 17, and the auger 20 in the long straight cylinder 15 drives the sample to be transported to the top of the long straight cylinder 15; S4, the finely crushed soil sample is transported to the interior of the soil crushing box 12, and a number of small vibrators in the hollow box 11 drive the soil crushing box 12 to vibrate through a number of supporting legs 14; S5. The finely crushed soil sample is screened through the vibrating filter mesh 32, and the agglomerated stones and soil blocks are intercepted above the filter mesh 32. The bottom of the soil crushing box 12 can take out the soil sample below the filter mesh 32 through a valve.
[0036] The above are all preferred embodiments of the present application and are not intended to limit the protection scope of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.
Claims
1. A soil sampling device, characterized in that: The invention comprises a soil sampling component for soil sampling and a sample screening component for screening soil samples. The sample screening component comprises a hollow box (11) in the shape of a circular ring, a soil crushing box (12) arranged inside the hollow box (11), a plurality of first supporting legs (13) fixedly connected between the hollow box (11) and an existing soil drilling device, and a plurality of second supporting legs (14) fixedly connected between the hollow box (11) and the soil crushing box (12); a plurality of small vibrators are fixedly installed in the inner cavity of the hollow box (11).
2. A soil sampling device according to claim 1, characterized in that: The soil sampling component comprises a long straight tube (15) rotatably mounted on the bottom of the soil crushing box (12), and a lantern-shaped drill bit (17) coaxially fixed to the bottom end of the long straight tube (15); the long straight tube (15) is arranged at the center position of the bottom of the soil crushing box (12) along the vertical direction, and the parts where the long straight tube (15) and the soil crushing box (12) are combined are communicated with each other, and the parts where the long straight tube (15) and the lantern-shaped drill bit (17) are combined are communicated with each other.
3. A soil sampling device according to claim 2, characterized in that: The outer peripheral surface of the long straight tube (15) is provided with an auxiliary component, and the auxiliary component includes a spiral blade (16) fixedly installed on the peripheral side of the long straight tube (15); the spiral blade (16) is arranged along the length direction of the long straight tube (15), and the spiral blade (16) is spirally arranged in a clockwise direction.
4. A soil sampling device according to claim 2, characterized in that: The lantern-shaped drill bit (17) is in the shape of an inverted cone, and an interception component is provided on the circumferential side of the lantern-shaped drill bit (17). The interception component includes a plurality of steel wire strands (18) fixedly connected between the tip of the lantern-shaped drill bit (17) and the circumferential edge of the end of the lantern-shaped drill bit (17).
5. A soil sampling device according to claim 2, characterized in that: A conveying component is provided in the long straight cylinder (15), and the conveying component comprises a rotating shaft (19) rotatably mounted in the long straight cylinder (15), and an auger (20) fixed around the outer peripheral surface of the rotating shaft (19) along the length direction of the rotating shaft (19); the long straight cylinder (15) and the rotating shaft (19) are coaxially arranged, and the rotating shaft (19) is arranged along the length direction of the long straight cylinder (15). The bottom end of the rotating shaft (19) is rotatably mounted on the end of the lantern-shaped drill bit (17), and the outer peripheral surface of the auger (20) is arranged to fit the inner peripheral surface of the long straight cylinder (15).
6. A soil sampling device according to claim 5, characterized in that: A driving component is provided above the soil crushing box (12), and the driving component comprises a circular plate (21) arranged above the soil crushing box (12), a motor (23) fixedly mounted on the top of the circular plate (21), a gear ring (24) rotatably mounted on the bottom of the circular plate (21), a plane plate (25) coaxially fixed to the bottom of the gear ring (24), a plurality of guide shafts (26) connected between the bottom of the plane plate (25) and the top of the long straight cylinder (15), a gear 1 (27) coaxially fixed to the output shaft of the motor (23), and a gear 2 (28) meshed with the gear ring (24) and the gear 1 (27); the rotating shaft (19) is fixedly connected to the output shaft of the motor (23), the meshing teeth of the gear ring (24) are located on the inner circumference of the gear ring (24), and the circular plate (21) is fixedly connected to an existing soil drilling equipment.
7. A soil sampling device according to claim 5, characterized in that: A connecting component is provided between the soil crushing box (12) and the long straight tube (15), and the connecting component comprises a notch (29) opened at the bottom of the soil crushing box (12), a horn ring (30) installed at the bottom of the soil crushing box (12) through the notch (29), and a buffer cloth (31) fixedly connected between the top of the long straight tube (15) and the top of the horn ring (30); the top of the long straight tube (15) passes through the horn ring (30), and the buffer cloth (31) is rotatably installed on the top of the long straight tube (15), and the shape of the horn ring (30) is an inverted horn shape.
8. A soil sampling device according to claim 7, characterized in that: The sample screening component further comprises a filter sheet (32) fixedly connected between the outer circumference of the horn ring (30) and the inner circumference of the soil crushing box (12), and a valve arranged at the bottom of the soil crushing box (12); the filter sheet (32) is a sheet structure in the shape of a circular ring composed of a steel wire filter.
9. A method for using a soil sampling device, used to operate a soil sampling device according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1, the driving component drives the long straight cylinder (15) to rotate through the guide shaft (26); S2, the rotating long straight cylinder (15) drives the lantern-shaped drill bit (17) to rotate synchronously, the existing soil drilling equipment drives the soil sampling component to drill into the soil to be sampled, and the auxiliary component assists the lantern-shaped drill bit (17) to drill into the soil to be sampled; S3, the interception component prevents large stones and soil blocks from entering the long straight cylinder (15) through the lantern-shaped drill bit (17), and the finely crushed soil sample enters the long straight cylinder (15) through the soil sampling component, and the conveying component in the long straight cylinder (15) drives the sample to be conveyed to the top of the long straight cylinder (15); S4, the finely crushed soil sample is transported to the interior of the soil crushing box (12), and a plurality of small vibrators in the hollow box (11) drive the soil crushing box (12) to vibrate; S5. The finely crushed soil sample is screened through a vibrating filter sheet (32), and the agglomerated stones and soil blocks are intercepted above the filter sheet (32). The bottom of the soil crushing box (12) can be used to take out the soil sample below the filter sheet (32) through a valve.