A device for determining the depth of underground soil water collection

Abstract

This invention discloses a groundwater depth-based sampling device, comprising a support base with two sets of symmetrically rotatably mounted support wheels at both ends of the base's bottom; a transmission sleeve rotatably mounted on the support base, with a feed rod slidably mounted inside the sleeve and aligned with its axis; two guide rods symmetrically fixedly mounted on the upper part of the support base outside the transmission sleeve, with a T-shaped lifting platform slidably mounted between the two guide rods; the upper end of the feed rod is rotatably mounted on the end of the lifting platform away from the two guide rods; the upper ends of the two guide rods are jointly fixedly connected to a horizontal mounting plate, and a sampler is detachably mounted on the lower end of the feed rod. This invention avoids the mixing of soil water at different depths during the traversal of non-target layers and the upward extraction process of traditional sampling devices, significantly improving the depth representativeness of the sample and the authenticity of the test data.

Description

Technical Field

[0001] This invention relates to the field of hydrogeological survey technology, and in particular to a device for determining the depth of underground soil water collection. Background Technology

[0002] Soil water, as the most active component of the terrestrial water cycle, is a core medium for plant water absorption, pollutant migration and transformation, and soil ecological processes. Accurately collecting in-situ soil water samples at specific depths is invaluable for revealing soil water movement mechanisms, assessing agricultural irrigation efficiency, monitoring vadose zone pollutant migration, and conducting research on soil salinization control. Currently, when sampling deep soil layers (typically 1-5 meters below the surface), shallow soil particles, pore water, or organic impurities are easily mixed into the sampler as it traverses non-target soil layers to reach the deeper target layer. More seriously, some devices lack effective isolation and sealing structures during the ascent and extraction process, causing soil water from different depths to mix within the sampling channel, thus compromising the depth representativeness of the sample. This interlayer cross-contamination prevents the test results from accurately reflecting the soil water chemical characteristics of the target layer. Therefore, a groundwater fixed-depth sampling device needs to be developed. Summary of the Invention

[0003] The purpose of this invention is to provide a device for determining the depth of underground soil water collection, thereby solving the technical problems mentioned in the background section.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: This invention discloses a device for determining the depth of underground soil water collection, comprising a support base with two sets of support wheels symmetrically and rotatably mounted at both ends of the bottom of the support base; a transmission sleeve rotatably mounted on the support base, with a feed rod slidably mounted inside the transmission sleeve and drivenly connected to the inner wall of the transmission sleeve; two guide rods symmetrically and fixedly mounted on the upper part of the support base outside the transmission sleeve, one of the guide rods having a scale line along the vertical direction; a T-shaped lifting platform slidably mounted between the two guide rods, with the upper end of the feed rod rotatably mounted at the end of the lifting platform away from the two guide rods; the upper ends of the two guide rods are commonly and fixedly connected to a horizontal mounting plate, and a rotary drive mechanism is provided between the mounting plate and the support base for driving the feed rod to move linearly in the vertical direction and rotate; a sampling collector is detachably mounted on the lower end of the feed rod.

[0005] Furthermore, two force-applying handles are fixedly installed at both ends of the upper part of the support base.

[0006] Furthermore, the inner circumferential wall of the transmission sleeve is uniformly provided with a plurality of transmission grooves along the circumferential direction, and the outer circumferential wall of the feed rod is uniformly provided with a plurality of elongated transmission bosses that are adapted to each of the transmission grooves in the transmission sleeve.

[0007] Furthermore, a scraper is fixedly installed below the transmission sleeve, and the inner side of the scraper contacts and engages with the outer wall of the feed rod.

[0008] Furthermore, the rotary drive mechanism includes a transmission screw rotatably disposed between the support base and the mounting plate, and a first motor fixedly disposed on the upper part of the mounting plate for driving the transmission screw to rotate. A transmission sleeve threadedly connected to the transmission screw is fixedly disposed on the lifting platform, and the lower end of the transmission screw is operatively connected to the outer peripheral wall of the transmission sleeve.

[0009] Furthermore, a drive gear is fixedly sleeved at the lower end of the transmission screw, and a driven gear that meshes with the drive gear is fixedly sleeved on the outer peripheral wall of the transmission sleeve.

[0010] Furthermore, the upper part of the sampling collector is a cylindrical sampling tube, and a conical feed head is fixedly installed at the bottom of the sampling tube.

[0011] Furthermore, a partition is fixedly provided at the lower middle of the feed rod, and a first connecting boss is fixedly provided at the lower end of the sampling cylinder outside the partition; a second connecting boss is fixedly provided at the upper end of the sampling cylinder, the second connecting boss is inserted into the interior of the first connecting boss, two countersunk threaded holes are symmetrically provided on the first connecting boss, and two threaded blind holes with the same thread section specification as the countersunk threaded holes are symmetrically provided on the second connecting boss, and countersunk screws are provided between each corresponding countersunk threaded hole and the threaded blind hole.

[0012] Furthermore, the sampling tube has multiple sampling ports evenly distributed circumferentially on its peripheral wall, and multiple sealing plates that are adapted to each of the sampling ports are evenly distributed circumferentially below the feed rod. The outer side wall of each sealing plate is specifically an arc-shaped structure that rotates and contacts the inner peripheral wall of the sampling tube. The partition plate is provided with a sealing switch mechanism for driving the multiple sealing plates to rotate synchronously.

[0013] Furthermore, the sealing switch mechanism includes a second motor fixedly mounted above the partition plate. The drive shaft of the second motor is rotatably connected to a rotating shaft rotatably mounted below the partition plate. The lower end of the rotating shaft is fixedly connected to the inner upper end of each sealing plate via multiple connecting rods evenly arranged along its circumference.

[0014] Compared with the prior art, the beneficial technical effects of the present invention are as follows: This invention employs a rotary drive mechanism consisting of a drive screw, a drive sleeve, and a feed rod. This mechanism allows the feed rod to rotate while simultaneously feeding linearly, enabling it to penetrate the soil layer with minimal disturbance and reducing damage to the original soil structure. Simultaneously, a scraper is fixedly installed below the drive sleeve. The inner side of this scraper contacts the outer wall of the feed rod, scraping away soil adhering to the outer wall in real time as the feed rod retracts upwards. This design not only ensures the cleanliness of the transmission between the feed rod and the drive sleeve but also guarantees long-term operational reliability.

[0015] This invention achieves active and controllable opening and closing of the sampling ports by setting multiple sampling ports on the peripheral wall of the sampling cylinder and matching them with a rotatable sealing plate structure driven by a second motor, a rotating shaft, and a connecting rod. During the descent, the sealing plate completely covers the sampling ports, effectively preventing shallow soil particles, pore water, and organic impurities from entering the sampling cylinder. After reaching the target depth, the sealing plate rotates open to collect samples. Before lifting, the sealing plate closes the sampling ports again. This "descending closure—reaching the target depth and opening—re-closing before lifting" operation sequence avoids the mixing of soil water at different depths during the traversal of non-target layers and the upward extraction process of traditional sampling devices, significantly improving the depth representativeness of the samples and the authenticity of the test data. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings.

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the main structure of the present invention; Figure 3 This is a side view of the structure of the present invention; Figure 4 This is a schematic diagram of the connection between the feed rod and the transmission sleeve of the present invention; Figure 5 This is a schematic diagram showing the connection between the sampling cylinder and the feed rod of the present invention; Explanation of reference numerals in the attached drawings: 1. Support base; 2. Support caster; 3. Force application handle; 4. Transmission sleeve; 5. Feed rod; 6. Transmission groove; 7. Transmission boss; 8. Scraper; 9. Guide rod; 10. Lifting platform; 11. Mounting plate; 12. Transmission screw; 13. First motor; 14. Transmission screw sleeve; 15. Drive gear; 16. Driven gear; 17. Sampling device; 18. Sampling cylinder; 19. Feed head; 20. Partition plate; 21. First connecting boss; 22. Second connecting boss; 23. Countersunk screw; 24. Sample inlet; 25. Sealing plate; 26. Second motor; 27. Rotating shaft; 28. Connecting rod. Detailed Implementation

[0018] like Figures 1-5 As shown, a groundwater depth-based sampling device includes a support base 1. Two sets of support wheels 2 are symmetrically and rotatably mounted at both ends of the bottom of the support base 1. Two force-applying handles 3 are fixedly installed at both ends of the upper part of the support base 1. Workers can push the entire sampling device on the ground using the two force-applying handles 3, and can also apply force to the force-applying handles 3 during sampling operations to keep the entire sampling device stable.

[0019] A transmission sleeve 4 is rotatably mounted on the support base 1. A feed rod 5, aligned with the axis of the transmission sleeve 4, is slidably mounted inside the transmission sleeve 4, and the outer peripheral wall of the feed rod 5 is connected to the inner peripheral wall of the transmission sleeve 4. Specifically, the inner peripheral wall of the transmission sleeve 4 is evenly provided with multiple transmission grooves 6 along the circumferential direction, and the outer peripheral wall of the feed rod 5 is evenly provided with multiple elongated transmission bosses 7, each adapted to one of the transmission grooves 6 inside the transmission sleeve 4. This allows the feed rod 5 to move linearly along the axis of the transmission sleeve 4 and also to rotate with the transmission sleeve 4.

[0020] A scraper 8 is fixedly installed below the transmission sleeve 4. The inner side of the scraper 8 contacts and cooperates with the outer wall of the feed rod 5. When the feed rod 5 moves upward from the soil, the scraper 8 scrapes off the soil adhering to the outer wall of the feed rod 5, so as to avoid adversely affecting the transmission relationship between the feed rod 5 and the transmission sleeve 4.

[0021] Two vertical guide rods 9 are symmetrically fixedly mounted on the upper part of the support base 1 on the outer side of the transmission sleeve 4, one of which has a scale line along the vertical direction. A T-shaped lifting platform 10 is slidably mounted between the two guide rods 9, and the upper end of the feed rod 5 is rotatably mounted on the end of the lifting platform 10 away from the two guide rods 9. The upper ends of the two guide rods 9 are fixedly connected to a horizontal mounting plate 11, and a rotary drive mechanism is provided between the mounting plate 11 and the support base 1 to drive the feed rod 5 to move linearly in the vertical direction and to rotate.

[0022] In this embodiment, the rotary drive mechanism includes a transmission screw 12 rotatably mounted between the support base 1 and the mounting plate 11, and a first motor 13 fixedly mounted on the upper part of the mounting plate 11 for driving the transmission screw 12 to rotate. A transmission sleeve 14 threadedly connected to the transmission screw 12 is fixedly mounted on the lifting platform 10. The lower end of the transmission screw 12 is drively connected to the outer peripheral wall of the transmission sleeve 4. Specifically, a drive gear 15 is fixedly fitted on the lower end of the transmission screw 12, and a driven gear 16 meshing with the drive gear 15 is fixedly fitted on the upper outer peripheral wall of the transmission sleeve 4.

[0023] When the first motor 13 starts, it drives the transmission screw 12 to rotate. Since the transmission sleeve 14 on the lifting platform 10 maintains a threaded connection with the transmission screw 12, the rotational motion of the transmission screw 12 is converted into linear motion of the lifting platform 10 and the feed rod 5. At the same time, the rotating transmission screw 12 drives the transmission sleeve 4 to rotate through the meshing transmission action of the driving gear 15 and the driven gear 16. The rotating transmission sleeve 4 further drives the feed rod 5 to rotate, so that the feed rod 5 can rotate while moving linearly along the vertical axis, and can screw into the soil layer.

[0024] A sampling device 17 is detachably mounted on the lower end of the feed rod 5. Specifically, the upper half of the sampling device 17 is a cylindrical sampling tube 18, which is used to collect soil water samples within a certain depth range. A conical feed head 19 is fixedly connected to the bottom of the sampling tube 18. The conical structure of the feed head 19 facilitates the feed rod 5 and the sampling tube 18 to rotate into the soil layer.

[0025] A horizontal partition 20 is fixedly installed at the lower middle of the feed rod 5, and a first connecting boss 21 is fixedly installed on the lower end of the sampling cylinder 18 outside the partition 20. A second connecting boss 22 is fixedly installed at the upper end of the sampling cylinder 18, and the second connecting boss 22 is inserted into the interior of the first connecting boss 21. Two countersunk threaded holes are symmetrically opened on the first connecting boss 21, and two threaded blind holes with the same thread section specification as the countersunk threaded holes are symmetrically opened on the second connecting boss 22. Countersunk screws 23 are installed between the corresponding countersunk threaded holes and the threaded blind holes, thereby achieving a detachable connection between the sampling cylinder 18 and the feed rod 5 through the two countersunk screws 23.

[0026] The sampling cylinder 18 has multiple sampling ports 24 evenly distributed circumferentially on its peripheral wall. Below the feed rod 5, multiple sealing plates 25 are evenly distributed circumferentially, each adapted to one of the sampling ports 24. The outer wall of each sealing plate 25 is specifically an arc-shaped structure that rotatably contacts the inner peripheral wall of the sampling cylinder 18. The partition 20 is equipped with a sealing switch mechanism for driving the multiple sealing plates 25 to rotate synchronously. In this embodiment, the sealing switch mechanism includes a second motor 26 fixedly installed above the partition 25. The drive shaft of the second motor 26 is rotatably connected to a rotating shaft 27 rotatably installed below the partition 25. The lower end of the rotating shaft 27 is fixedly connected to the inner upper end of each sealing plate 25 via multiple connecting rods 28 evenly distributed circumferentially. When the second motor starts, the rotating shaft 27 and connecting rods 28 drive the multiple sealing plates 25 to rotate synchronously, thereby switching the sampling ports 24 between blocked and open states.

[0027] The specific working principle of this invention is as follows: After the staff moves the support base 1 to the designated sampling position, the first motor 13 is started. The staff applies force to the two force-applying handles 3 to ensure the stability of the support base 1. The first motor 13 drives the transmission screw 12 to rotate. Since the transmission sleeve 14 on the lifting platform 10 maintains a threaded connection with the transmission screw 12, the rotational motion of the transmission screw 12 is converted into linear motion of the lifting platform 10 and the feed rod 5. At the same time, the rotating transmission screw 12 drives the transmission sleeve 4 to rotate through the meshing transmission action of the driving gear 15 and the driven gear 16. The rotating transmission sleeve 4 further drives the feed rod 5 to rotate, so that the feed rod 5 can rotate while moving linearly along the vertical axis, and can be screwed into the soil layer. During this process, the sealing plates 25 cover and block the sampling port 24 of the sampling cylinder 18, so as to avoid the mixing of shallow soil particles, pore water or other impurities into the sampling cylinder when reaching the deep target layer. Staff observe the scale lines on the guide rod 9. When approaching the required sampling depth, the second motor 26 is activated. The second motor 26 drives the rotating shaft 27 to rotate, causing each sealing plate 25 to rotate and move away from its corresponding inlet 24, thus opening each inlet 24 on the sampling cylinder 18. The first motor 13 drives the feed rod 5 to advance into the deep target layer. During this process, samples from the target layer enter the sampling cylinder 18 through each inlet 24, completing automatic sampling. After a certain period of sampling, the second motor 26 reverses the rotation of the rotating shaft 27, causing each sealing plate 25 to move and reset, again covering each inlet 24. The first motor 13 reverses the rotation of the transmission screw 12, causing the feed rod 5 to gradually move upward. During this process, the sampling cylinder 18 remains closed, preventing water from the upper soil layer from entering its interior. When the sampling collector 17 is completely moved outside the soil layer, the operator can unscrew the two countersunk screws 23 to remove the sampling collector 17 from the feed rod 5, so as to extract the sample from the sampling tube 18.

[0028] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A device for determining the depth of underground soil water collection, characterized in that: The device includes a support base with two sets of symmetrically rotatably mounted support wheels at its bottom ends. A transmission sleeve is rotatably mounted on the support base, and a feed rod aligned with its axis is slidably mounted inside the transmission sleeve, with the outer circumferential wall of the feed rod connected to the inner circumferential wall of the transmission sleeve. Two guide rods are symmetrically fixedly mounted on the upper part of the support base outside the transmission sleeve, one of which has a vertically oriented scale line. A T-shaped lifting platform is slidably mounted between the two guide rods, with the upper end of the feed rod rotatably mounted at the end of the lifting platform away from the two guide rods. The upper ends of the two guide rods are jointly fixedly connected to a horizontal mounting plate. A rotary drive mechanism is provided between the mounting plate and the support base to drive the feed rod to move linearly vertically and rotate. A sampling collector is detachably mounted on the lower end of the feed rod.

2. The underground soil water depth sampling device according to claim 1, characterized in that: Two force-applying handles are fixedly installed at both ends of the upper part of the support base.

3. The underground soil water depth sampling device according to claim 1, characterized in that: The inner circumferential wall of the transmission sleeve is uniformly provided with multiple transmission grooves along the circumferential direction, and the outer circumferential wall of the feed rod is uniformly provided with multiple elongated transmission bosses that are adapted to each of the transmission grooves in the transmission sleeve.

4. The underground soil water depth acquisition device according to claim 3, characterized in that: A scraper is fixedly installed below the transmission sleeve, and the inner side of the scraper is in contact with the outer wall of the feed rod.

5. The underground soil water depth acquisition device according to claim 1, characterized in that: The rotary drive mechanism includes a transmission screw rotatably disposed between the support base and the mounting plate, and a first motor fixedly disposed on the upper part of the mounting plate for driving the transmission screw to rotate. A transmission sleeve threadedly connected to the transmission screw is fixedly disposed on the lifting platform, and the lower end of the transmission screw is tractively connected to the outer peripheral wall of the transmission sleeve.

6. The underground soil water depth acquisition device according to claim 5, characterized in that: The lower end of the transmission screw is fixedly fitted with a driving gear, and the outer peripheral wall of the transmission sleeve is fixedly fitted with a driven gear that meshes with the driving gear.

7. The underground soil water depth acquisition device according to claim 1, characterized in that: The upper part of the sampling collector is a cylindrical sampling tube, and a conical feed head is fixedly installed at the bottom of the sampling tube.

8. The underground soil water depth acquisition device according to claim 7, characterized in that: The A partition is fixedly installed at the lower middle of the feed rod, and a first connecting boss is fixedly installed at the lower end of the sampling cylinder outside the partition; a second connecting boss is fixedly installed at the upper end of the sampling cylinder, and the second connecting boss is inserted into the interior of the first connecting boss. Two countersunk threaded holes are symmetrically opened on the first connecting boss, and two threaded blind holes with the same thread section specification as the countersunk threaded holes are symmetrically opened on the second connecting boss. Countersunk screws are provided between the corresponding countersunk threaded holes and the threaded blind holes.

9. The underground soil water depth acquisition device according to claim 8, characterized in that: The sampling tube has multiple sampling ports evenly distributed circumferentially on its peripheral wall. Below the feed rod, multiple sealing plates are evenly distributed circumferentially, each adapted to one of the sampling ports. The outer side wall of each sealing plate is specifically an arc-shaped structure that rotates and contacts the inner peripheral wall of the sampling tube. The partition plate is provided with a sealing switch mechanism for driving the multiple sealing plates to rotate synchronously.

10. The underground soil water depth acquisition device according to claim 9, characterized in that: The sealing switch mechanism includes a second motor fixedly mounted above the partition. The drive shaft of the second motor is rotatably connected to a rotating shaft rotatably mounted below the partition. The lower end of the rotating shaft is fixedly connected to the inner upper end of each sealing plate via multiple connecting rods evenly arranged along its circumference.

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