A soil sampler for saline-alkali soil improvement

Abstract

The application provides a soil sampler for saline-alkali soil improvement, and relates to the technical field of soil detection. The soil sampler comprises a supporting frame, a sampling pipe and a driving assembly. The supporting frame comprises a center sleeve, a limiting ring and at least three inclined support rods. The plurality of inclined support rods are arranged at equal intervals along the circumference of the center sleeve. The top end of each inclined support rod is hinged to the outer wall of the center sleeve. The limiting ring is sleeved on the center sleeve and can be lifted along the center sleeve. Each inclined support rod is hinged to a connecting rod on the rod body. The end of each connecting rod away from the inclined support rod is hinged to the limiting ring. The top end of the sampling pipe is inserted into the center sleeve through the bottom sleeve opening of the center sleeve. The driving assembly is in transmission connection with the sampling pipe and can drive the sampling pipe to lift along the length direction of the center sleeve. The application can effectively avoid the sampling failure caused by the inclination of the sampling pipe.

Description

Technical Field

[0001] This application relates to the field of soil testing technology, and in particular to a soil sampler for improving saline-alkali soil. Background Technology

[0002] When conducting soil testing, a soil sampler is required to take samples from the area to be tested.

[0003] Existing soil samplers generally include a handle and a foot pedal. The main rod is fixedly connected to the middle of the lower end of the handle, and a sampling slot is opened at the bottom of the main rod. The foot pedal is connected to one side of the main rod. When sampling, the user first places the opening of the sampling slot against the surface of the soil layer to be sampled, then holds the handle and applies downward force by stepping on the foot pedal to insert the main rod into the soil layer and collect the sample through the sampling slot.

[0004] However, in order to ensure that the sample reflects the true condition of each soil layer, the soil sampler needs to ensure that the sampling trench is perpendicular to the soil surface. Since the user is standing on one side of the soil sampler and exerts force, the downward pressure on the soil sampler is tilted towards the soil surface. When the area to be tested is a hard soil such as saline-alkali land, sampling failure is likely to occur because the soil sampler is tilted towards the soil surface.

[0005] In view of this, there is a need to provide a soil sampler for improving saline-alkali soil. Utility Model Content

[0006] To address the problem that existing soil samplers often fail to collect samples due to tilting the sampler onto the soil surface, this application provides a soil sampler for improving saline-alkali soil.

[0007] This application provides a soil sampler for improving saline-alkali soil, which adopts the following technical solution: it includes a support frame, a sampling tube and a driving assembly. The support frame includes a central sleeve, a limiting ring and at least three diagonal braces. The diagonal braces are evenly spaced along the circumference of the central sleeve. The top of each diagonal brace is hinged to the outer wall of the central sleeve. The limiting ring is sleeved on the central sleeve and can move up and down along the central sleeve. A connecting rod is hinged to the body of each diagonal brace. The end of each connecting rod away from the diagonal brace is hinged to the limiting ring. The top end of the sampling tube passes through the bottom opening of the central sleeve and is inserted into the central sleeve; The drive assembly is connected to the sampling tube and can drive the sampling tube to move up and down along the length of the central sleeve.

[0008] By adopting the above technical solution, before soil sampling, the user can first select a flat area within the testing area, then push the limiting ring down along the central sleeve to open the multiple diagonal braces, and finally make the common surface of the bottom ends of each diagonal brace coincide with the ground surface. Since each diagonal brace and the limiting ring are equipped with a connecting rod of equal length, the length direction of the central sleeve will be perpendicular to the ground surface, allowing the user to drive the sampling tube down along the length direction of the central sleeve using the driving device, thereby allowing the sampling tube to be inserted into the soil layer for sampling, and then the entire saline-alkali land... The soil sampler for soil improvement is lifted upwards so that the sampling tube carries the soil sample away from the soil layer. This allows the soil sampler for saline-alkali soil improvement to achieve vertical sampling of the soil surface with relatively small errors. Compared with the existing technology where the user stands on one side of the soil sampler and exerts force, causing the soil sampler to tilt to the soil surface due to downward pressure, which easily leads to sampling failure due to tilting, the support frame of this sampler can be stably supported on the ground, ensuring that the sampling tube is perpendicular to the soil surface for sampling, effectively avoiding the sampling failure problem caused by tilting.

[0009] Specifically, the central sleeve has an annular limiting groove along the vertical direction, the limiting ring is located in the annular limiting groove and can slide along the vertical direction, and the annular surface of the limiting ring can abut against the bottom wall of the annular limiting groove.

[0010] By adopting the above technical solution, the central sleeve of the soil sampler for saline-alkali land soil improvement is equipped with an annular limiting groove. The limiting ring slides vertically in the annular limiting groove and the ring surface can abut against the bottom wall of the groove. This can guide and limit the sliding of the limiting ring, ensuring the stability of the connection between the diagonal support rod and the limiting ring and the central sleeve. This ensures that the support frame supports the sampling tube for vertical sampling and avoids sampling failure due to tilting.

[0011] Furthermore, the central sleeve also includes an elastic element, which is connected to the limiting ring and can apply an upward force to the limiting ring, and the top wall of the annular limiting groove can abut against the annular surface of the limiting ring.

[0012] By adopting the above technical solution, the elastic element is connected to the limiting ring and applies an upward force to it. This allows the limiting ring to be pulled to the top wall of the annular limiting groove by the elastic element when not in use, thereby retracting the diagonal support rod upwards. In this way, the diagonal support rod can be retracted when not in use, preventing it from swaying freely, reducing the space occupied by the diagonal support rod when not in use, facilitating the carrying and storage of the soil sampler, and also reducing the risk of damage to the diagonal support rod due to swaying, thus extending its service life.

[0013] Furthermore, the central sleeve also includes a clamping bolt, and the limiting ring has a locking screw hole. The clamping bolt is screwed into the locking screw hole, and the screw end of the clamping bolt can abut against the central sleeve and restrict the movement of the limiting ring.

[0014] By adopting the above technical solution, the tightening bolt is screwed into the locking screw hole on the limiting ring, and the screw end abuts against the center sleeve, which can restrict the movement of the limiting ring, thereby fixing the opening angle of the diagonal brace, so that the support frame can be stably supported, ensuring that the sampling tube is perpendicular to the soil surface for sampling, and improving the sampling success rate.

[0015] Specifically, the support frame also includes multiple pressure-reducing plates, each corresponding to one of the diagonal braces. The bottom end of each diagonal brace is connected to the corresponding pressure-reducing plate, and the bottom surface of each pressure-reducing plate can abut against the ground.

[0016] By adopting the above technical solution, the pressure relief plate and the diagonal brace are connected one-to-one. The bottom surface of the pressure relief plate abuts against the ground, increasing the contact area with the ground. This can disperse the pressure of the diagonal brace on the ground, prevent the diagonal brace from sinking into the ground, and make the support frame more stably supported on the ground. This ensures the stability of the soil sampler during the sampling process and reduces the possibility of sampling failure due to tilting.

[0017] Specifically, the driving assembly includes a driving rod and a rotating handle. The top of the sampling tube has a driving screw hole leading to its interior. The driving rod has an abutment protrusion and a threaded section that matches the driving screw hole. The inner wall of the central sleeve has an annular receiving groove for installing a bearing. The abutment protrusion is inserted into the annular receiving groove. The driving rod can be rotatably connected to the central sleeve by abutting the bearing in the annular receiving groove through the abutment protrusion. The bottom end of the driving rod extends into the sampling tube through the driving screw hole and is connected to the sampling tube by screwing the threaded section into the driving screw hole. The rotating handle is connected to the top end of the driving rod. The bottom opening of the central sleeve forms a non-circular notch. The top end of the sampling tube passes through the bottom opening of the central sleeve and is inserted into the central sleeve, and can move along the length of the central sleeve. The inner wall of the central sleeve can abut against the sampling tube and restrict the sampling tube from rotating together with the drive rod.

[0018] By adopting the above technical solution, the abutting protrusion on the drive rod is rotatably connected to the bearing in the annular receiving groove on the inner wall of the central sleeve, ensuring the stability of the drive rod rotation; the handle makes it convenient for the operator to rotate the drive rod, and by utilizing the threaded engagement between the drive rod and the drive screw hole on the sampling tube, the rotational motion of the drive rod can be converted into the lifting motion of the sampling tube along the inner wall of the central sleeve, realizing the adjustment of the height of the sampling tube, thereby facilitating soil sampling operations.

[0019] Furthermore, the driving assembly also includes a sample pusher plate, which is rotatably connected to the bottom end of the driving rod, and the body of the sample pusher plate abuts against the inner wall of the sampling tube.

[0020] By adopting the above technical solution, the push plate is rotatably connected to the bottom of the drive rod, and its body abuts against the inner wall of the sampling tube. When it is necessary to take out the soil sample from the sampling tube, the user can rotate the drive rod to raise the sampling tube, and then push out the soil sample collected in the sampling tube through the push plate.

[0021] Specifically, the sampling tube has a soil-breaking tip at the bottom end.

[0022] By adopting the above technical solution, a soil-breaking tip is set at the bottom of the sampling tube, which makes it easier to insert the sampling tube into the soil, reduces the resistance during insertion, and improves sampling efficiency.

[0023] In summary, this application includes the following beneficial technical effects: The system includes a support frame, a sampling tube, and a drive assembly. The support frame comprises a central sleeve, a limiting ring, and at least three diagonal braces. These diagonal braces are evenly spaced along the circumference of the central sleeve, with the top of each brace hinged to the outer wall of the central sleeve. The limiting ring is fitted onto the central sleeve and can move up and down along it. Each diagonal brace has a connecting rod hinged to its shaft, with the end of each connecting rod away from the diagonal brace hinged to the limiting ring. The top of the sampling tube passes through the bottom opening of the central sleeve and is inserted into it. The drive assembly is connected to the sampling tube and can drive it to move up and down along the length of the central sleeve. This allows the user to select a flat area within the testing zone before soil sampling, then push the limiting ring down along the central sleeve to open the diagonal braces, finally aligning the common surface of the bottom ends of all the diagonal braces with the ground surface. Equal-length connecting rods are installed between the limiting rings, so the length direction of the central sleeve is perpendicular to the ground surface. This allows the user to drive the sampling tube down along the length direction of the central sleeve using the drive device, so that the sampling tube can be inserted into the soil layer for sampling. Then, the entire soil sampler for saline-alkali land improvement is lifted up so that the sampling tube carries the soil sample away from the soil layer. This allows the soil sampler for saline-alkali land improvement to achieve vertical sampling of the soil surface with relatively small errors. Compared with the existing technology where the user stands on one side of the soil sampler and exerts force, causing the soil sampler to tilt to the soil surface and easily leading to sampling failure due to tilting, the support frame of this sampler can be stably supported on the ground, ensuring that the sampling tube is perpendicular to the soil surface for sampling, effectively avoiding the sampling failure problem caused by tilting. Attached Figure Description

[0024] Figure 1This is a perspective view of a soil sampler for improving saline-alkali soil according to this application; Figure 2 This is a right view of a soil sampler for improving saline-alkali soil according to this application; Figure 3 It is along Figure 2 A schematic cross-sectional view taken along the AA direction.

[0025] Reference numerals: 1. Support frame; 11. Center sleeve; 111. Annular limiting groove; 112. Elastic element; 113. Tightening bolt; 12. Limiting ring; 13. Diagonal brace; 131. Connecting rod; 14. Pressure reducing plate; 2. Sampling tube; 21. Soil breaking tip; 3. Drive assembly; 31. Drive rod; 311. Abutting protrusion; 32. Rotating handle; 33. Pushing sample plate. Detailed Implementation

[0026] The following is in conjunction with the appendix Figure 1-3 Further explanation: See Figure 1 and Figure 2In one embodiment, the soil sampler for improving saline-alkali soil provided in this application includes: a support frame 1, a sampling tube 2, and a drive assembly 3. The support frame 1 includes a central sleeve 11, a limiting ring 12, three pressure-reducing plates 14, and three diagonal bracing rods 13. The central sleeve 11 includes a clamping bolt 113 and four elastic elements 112. The central sleeve 11 has cylindrical segments and hexagonal prism segments formed from top to bottom. The cross-section of the cylindrical segments is annular, and the cross-section of the hexagonal prism segments is a small regular hexagon nested within... The ring formed by the center of the large hexagon; an annular limiting groove 111 is formed vertically on the cylindrical section of the central sleeve 11, the limiting ring 12 is located in the annular limiting groove 111 and can slide along the length of the central sleeve 11, the bottom wall and top wall of the annular limiting groove 111 can abut against the annular surface of the limiting ring 12 and limit the distance of the limiting ring 12 sliding along the length of the central sleeve 11, the limiting ring 12 is provided with a locking screw hole, and the tightening bolt 113 is screwed into the locking screw hole, and the tightening bolt 113... The screw end can abut against the central sleeve 11 and restrict the movement of the limiting ring 12. Multiple diagonal braces 13 are evenly spaced along the circumference of the central sleeve 11. The top of each diagonal brace 13 is hinged to the outer wall of the central sleeve 11. The limiting ring 12 is sleeved on the central sleeve 11 and can move up and down along the central sleeve 11. A connecting rod 131 is hinged to the body of each diagonal brace 13. The end of each connecting rod 131 away from the diagonal brace 13 is hinged to the limiting ring 12. The pressure reducing plate 14 corresponds one-to-one with the diagonal brace 13. Each diagonal brace... The bottom end of 13 is connected to the corresponding pressure relief plate 14. The bottom surface of each pressure relief plate 14 can abut against the ground, so as to increase the contact area between the diagonal brace 13 and the ground, disperse the pressure of the diagonal brace 13 on the ground, and prevent the diagonal brace 13 from sinking into the ground during sampling. After the limiting ring 12 moves to a certain position, the tightening bolt 113 can abut against the center sleeve 11 and restrict the movement of the limiting ring 12, thereby fixing the opening angle of the diagonal brace 13 and making the support frame 1 stably supported.

[0027] See Figure 2 and Figure 3Four elastic elements 112 are evenly spaced along the circumference of the central sleeve 11 in the annular limiting groove 111. The bottom end of each elastic element 112 is connected to the top surface of the limiting ring 12, and the top end of each elastic element 112 is connected to the top wall of the annular limiting groove 111. The elastic elements 112 can be tension springs, so that each elastic element 112 is connected to the limiting ring 12 and applies an upward force to it. When not in use, the limiting ring 12 can be pulled to the top wall of the annular limiting groove 111 by the elastic elements 112, thereby causing the diagonal support rod 13 to retract upward. In this way, the diagonal support rod 13 can be retracted when not in use, preventing the diagonal support rod 13 from shaking freely, reducing the space occupied by the diagonal support rod 13 when idle, facilitating the carrying and storage of the soil sampler, and also reducing the risk of damage to the diagonal support rod 13 due to free shaking, thus extending the service life of the diagonal support rod 13.

[0028] See Figure 2 and Figure 3 The drive assembly 3 includes a drive rod 31, a handle 32, and a push plate 33. The top of the sampling tube 2 has a drive screw hole leading to its interior. The drive rod 31 has an annular abutment protrusion 311 and a threaded section adapted to the drive screw hole. The inner wall of the cylindrical section of the central sleeve 11 has an annular receiving groove for installing a thrust ball bearing. The abutment protrusion 311 is inserted into the annular receiving groove. The drive rod 31 can be rotatably connected to the central sleeve 11 by abutting the bearing in the annular receiving groove through the top of the abutment protrusion 311. The sampling tube 2 has a shape adapted to the hexagonal prism section of the central sleeve 11. The top of the sampling tube 2... The end of the drive rod 31 passes through the bottom opening of the central sleeve 11 and is inserted into the central sleeve 11 and can move along the length of the central sleeve 11. The bottom end of the drive rod 31 passes through the drive screw hole and extends into the sampling tube 2, and is connected to the sampling tube 2 via the threaded section and the drive screw hole. The handle 32 is connected to the top end of the drive rod 31. The inner wall of the hexagonal prism section of the central sleeve 11 can abut against the sampling tube 2 and restrict the sampling tube 2 from rotating with the drive rod 31. The push plate 33 is rotatably connected to the bottom end of the drive rod 31. The push plate 33 is a regular hexagonal plate. The plate body of the push plate 33 abuts against the inner wall of the sampling tube 2 and does not rotate with the drive rod 31.

[0029] Specifically, the connection between the pressure-reducing plate 14 and the diagonal brace 13 can be set as a fixed connection, and the bottom surface of the pressure-reducing plate 14 can be configured such that when the limiting ring 12 abuts against the bottom wall of the annular limiting groove 111, the bottom surface of each pressure-reducing plate 14 is perpendicular to the length direction of the central sleeve 11. This allows the user to select a flat area within the testing area before soil sampling, then push the limiting ring 12 down along the central sleeve 11 to open the multiple diagonal braces 13, and finally make the common surface of the bottom ends of each pressure-reducing plate 14 coincide with the ground surface. In this way, the user can select the testing area before soil sampling. In the flat area within the domain, the limiting ring 12 is pushed down along the central sleeve 11 to the bottom of the annular limiting groove 111 so that the multiple diagonal bracing rods 13 are opened to the maximum. Finally, the bottom of each pressure reducing plate 14 is aligned with the ground surface. Since each diagonal bracing rod 13 and the limiting ring 12 are provided with connecting rods 131 of equal length, the distance between the bottom of each diagonal bracing rod 13 and the central sleeve 11 is equal, so that the length direction of the central sleeve 11 will be perpendicular to the ground surface. A soil-breaking tip 21 can also be set on the bottom opening of the sampling tube 2 so that the sampling tube 2 can be inserted into the soil more easily, reducing the resistance during insertion and improving sampling efficiency.

[0030] It should be noted that the length of the central sleeve 11 mentioned in this application being perpendicular to the ground surface is not absolutely perpendicular. Furthermore, the error of this soil sampler for saline-alkali soil improvement during sampling depends on the flatness of the sampling area selected by the user. When the ground in the sampling area is relatively flat and the degree of subsidence after pressure is relatively uniform, the bottom surface of the pressure relief plate 14 can be regarded as the ground surface plane parallel to the sampling point directly below the central sleeve 11. This allows the soil sampler for saline-alkali soil improvement to meet the accuracy requirements of general research. For research with extremely high accuracy requirements or when the surface conditions are critical, it is strongly recommended to use a drill rod inclination meter for real-time monitoring as a double guarantee.

[0031] The working principle of the soil sampler for saline-alkali land soil improvement disclosed in this application is as follows: Before soil sampling, the user can first select a flat area within the testing area, then push the limiting ring 12 down along the central sleeve 11 to open the multiple diagonal bracing rods 13. Finally, the common surface of the bottom ends of each diagonal bracing rod 13 coincides with the ground surface. Since each diagonal bracing rod 13 and the limiting ring 12 are connected by an equal-length connecting rod 131, the length direction of the central sleeve 11 will be perpendicular to the ground surface. This allows the user to rotate the drive rod 31, utilizing the threaded engagement between the drive rod 31 and the drive screw hole on the sampling tube 2. This converts the rotational motion of the drive rod 31 into the lifting and lowering motion of the sampling tube 2 along the inner wall of the central sleeve 11, allowing the sampling tube 2 to first descend along the length direction of the central sleeve 11 and insert into the soil layer for sampling. Then, the entire saline-alkali soil... The soil sampler for soil improvement is lifted upwards to allow the sampling tube 2 to carry the soil sample away from the soil layer. Finally, when it is necessary to remove the soil sample from the sampling tube 2, the drive rod 31 is rotated to raise the sampling tube 2, and then the soil sample collected in the sampling tube 2 is pushed out by the push plate 33. This allows the soil sampler for saline-alkali land soil improvement to achieve vertical sampling of the soil surface with relatively small errors. Compared with the existing technology where the user stands on one side of the soil sampler and exerts force, causing the soil sampler to tilt to the soil surface due to downward pressure, which easily leads to sampling failure due to tilting, the support frame 1 of this sampler can be stably supported on the ground, ensuring that the sampling tube 2 is perpendicular to the soil surface for sampling, effectively avoiding the sampling failure problem caused by tilting.

[0032] It should be noted that the above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A soil sampler for improving saline-alkali soil, characterized in that: The device includes a support frame (1), a sampling tube (2), and a drive assembly (3). The support frame (1) includes a central sleeve (11), a limiting ring (12), and at least three diagonal braces (13). The multiple diagonal braces (13) are arranged at equal intervals along the circumference of the central sleeve (11). The top of each diagonal brace (13) is hinged to the outer wall of the central sleeve (11). The limiting ring (12) is sleeved on the central sleeve (11) and can move up and down along the central sleeve (11). Each diagonal brace (13) has a connecting rod (131) hinged to its body. The end of each connecting rod (131) away from the diagonal brace (13) is hinged to the limiting ring (12). The top end of the sampling tube (2) passes through the bottom opening of the central sleeve (11) and is inserted into the central sleeve (11); The drive assembly (3) is connected to the sampling tube (2) and can drive the sampling tube (2) to move up and down along the length of the central sleeve (11).

2. A soil sampler for improving saline-alkali soil according to claim 1, characterized in that: The central sleeve (11) has an annular limiting groove (111) in the vertical direction. The limiting ring (12) is located in the annular limiting groove (111) and can slide in the vertical direction. The annular surface of the limiting ring (12) can abut against the bottom wall of the annular limiting groove (111).

3. A soil sampler for improving saline-alkali soil according to claim 2, characterized in that: The central sleeve (11) also includes an elastic element (112), which is connected to the limiting ring (12) and can apply an upward force to the limiting ring (12). The top wall of the annular limiting groove (111) can abut against the annular surface of the limiting ring (12).

4. A soil sampler for improving saline-alkali soil according to claim 3, characterized in that: The center sleeve (11) also includes a clamping bolt (113), and the limiting ring (12) has a locking screw hole. The clamping bolt (113) is screwed into the locking screw hole, and the screw end of the clamping bolt (113) can abut against the center sleeve (11) and restrict the movement of the limiting ring (12).

5. A soil sampler for improving saline-alkali soil according to claim 1, characterized in that: The support frame (1) also includes multiple pressure relief plates (14), each pressure relief plate (14) corresponding to one of the diagonal braces (13). The bottom end of each diagonal brace (13) is connected to the corresponding pressure relief plate (14), and the bottom surface of each pressure relief plate (14) can abut against the ground.

6. A soil sampler for improving saline-alkali soil according to claim 1, characterized in that: The drive assembly (3) includes a drive rod (31) and a handle (32). The top of the sampling tube (2) is provided with a drive screw hole leading to its interior. The drive rod (31) has an abutment protrusion (311) and a threaded section that matches the drive screw hole. The inner wall of the center sleeve (11) is provided with an annular receiving groove for installing a bearing. The abutment protrusion (311) is inserted into the annular receiving groove. The drive rod (31) can be rotatably connected to the center sleeve (11) by abutting the bearing in the annular receiving groove through the abutment protrusion (311). The bottom end of the drive rod (31) extends into the sampling tube (2) through the drive screw hole and is connected to the sampling tube (2) by screwing the threaded section into the drive screw hole. The handle (32) is connected to the top end of the drive rod (31). The bottom opening of the central sleeve (11) forms a non-circular notch. The top end of the sampling tube (2) passes through the bottom opening of the central sleeve (11) and is inserted into the central sleeve (11) and can move along the length of the central sleeve (11). The inner wall of the central sleeve (11) can abut against the sampling tube (2) and restrict the sampling tube (2) from rotating together with the drive rod (31).

7. A soil sampler for improving saline-alkali soil according to claim 6, characterized in that: The drive assembly (3) also includes a pusher plate (33), which is rotatably connected to the bottom end of the drive rod (31), and the body of the pusher plate abuts against the inner wall of the sampling tube (2).

8. A soil sampler for improving saline-alkali soil according to claim 1, characterized in that: The sampling tube (2) has a soil-breaking tip (21) at the bottom end.

Images