A soil sampling structure and transportation and storage device

Abstract

This application relates to the technical field of material transportation and storage equipment. Addressing the issue that existing soil samples are easily disturbed after collection, affecting their integrity, this application proposes a soil sampling structure and transportation and storage device. One soil sampling structure includes an inner cylinder and an outer cylinder. The inner cylinder is formed by splicing two symmetrically arranged semi-cylindrical pieces. The two ends of the inner cylinder are connected to an upper cover and a lower cover respectively via threaded structures. The outer cylinder is used for inserting the inner cylinder. The two ends of the outer cylinder are connected to a connecting joint and a drill bit respectively via threaded structures. The connecting joint is used to connect to the power head of an impact drill, and the drill bit assists the outer cylinder in drilling into the soil layer. A limiting component is provided at the bottom of the inner cavity of the outer cylinder. When the inner cylinder is installed inside the outer cylinder, the limiting component cooperates with the connecting joint to limit the axial movement of the inner cylinder. This application effectively limits the disturbance of collected soil samples.

Description

Technical Field

[0001] This application relates to the technical field of material transportation and storage equipment, and in particular to a soil sampling structure and transportation and storage device. Background Technology

[0002] A large number of geotechnical tests are required during the geotechnical investigation process. The required soil samples are collected at the construction site using sampling equipment and then transported to the laboratory in batches for relevant testing.

[0003] Currently, soil sampling is usually carried out using an impact drill rig in conjunction with a sampling drill tube. In specific operation, the power head of the impact drill rig is connected to the connecting joint at the top of the sampling drill tube. The impact drill rig then drives the sampling drill tube into the ground to obtain soil samples. Finally, the sampling drill tube is pulled out using a drill tube puller to complete the sampling process.

[0004] Regarding the aforementioned technologies, in actual exploration processes, due to limitations of the site conditions, soil samples are typically taken directly from the sampling drill pipe and horizontally stacked in a sampling tray before being transported to the laboratory for testing. During this process, the soil samples are easily affected by secondary disturbances caused by the operation during extraction from the sampling drill pipe and vehicle bumps during subsequent transportation, which can reduce the integrity of the soil samples, leading to distorted geotechnical test data and reduced accuracy. Therefore, there is room for improvement. Summary of the Invention

[0005] To improve the integrity of collected soil samples and limit disturbance to the collected soil samples during transportation and transfer, this application provides a soil sampling structure and a transportation and storage device.

[0006] This application provides a soil sampling structure and transportation and storage device, which adopts the following technical solution:

[0007] A soil sampling structure, comprising an inner cylinder and an outer cylinder;

[0008] The inner cylinder is formed by splicing two symmetrically arranged semi-cylindrical parts, and the two ends of the inner cylinder are respectively connected to the upper cover and the lower cover through a threaded structure;

[0009] The outer cylinder is used for the inner cylinder to be inserted. The two ends of the outer cylinder are respectively connected to a connecting joint and a drill bit through a threaded structure. The connecting joint is used to connect to the power head of the impact drilling machine, and the drill bit is used to assist the outer cylinder in drilling into the soil layer.

[0010] A limiting component is provided at the bottom of the inner cavity of the outer cylinder; when the inner cylinder is installed in the inner cavity of the outer cylinder, the limiting component cooperates with the connecting joint to limit the inner cylinder and restrict the axial movement of the inner cylinder.

[0011] By adopting the above technical solution, during sampling, the lower cover of the inner cylinder is first removed, and the inner cylinder is inserted into the inner cavity of the outer cylinder. The limiting device at the bottom of the outer cylinder cooperates with the connecting joint to fix the inner cylinder. Then, the connecting joint of the outer cylinder is connected to the power head of the impact drilling rig, and the impact drilling rig drives the outer cylinder and the inner cylinder into the ground together. Under the action of impact pressure, the soil enters the interior of the inner cylinder to complete the soil sample collection. After the sampling is completed, the inner cylinder is removed from the outer cylinder, and the lower cover is installed to seal the bottom end of the inner cylinder. The inner cylinder, in conjunction with the upper and lower covers, is then used to sample the soil. The outer cylinder is used for sampling, and the inner cylinder is installed to continue sampling. After the soil sample is transferred to the testing location, the upper and lower covers are removed to separate the inner cylinder into two semi-cylinders, which facilitates the removal of the soil sample. Compared with the traditional soil sampling method, this method avoids the operational disturbance to the soil sample during the transfer and transportation of soil samples at the construction site, which helps to maintain the integrity of the soil sample. The limiting component and the connecting joint limit the inner cylinder, which helps to limit the relative displacement between the inner cylinder and the outer cylinder during the sampling process, so that the soil can enter the inner cylinder better.

[0012] Preferably, the upper cover and the connecting joint are respectively provided with a first air hole and a second air hole, and when the inner cylinder is installed in the outer cylinder, the first air hole and the second air hole are connected.

[0013] By adopting the above technical solution, the first and second air holes form a channel connecting the inside of the inner cylinder with the external environment. During subsequent sampling, the air inside the inner cylinder can be discharged in time, avoiding the soil from entering the inner cylinder and causing the air pressure inside the inner cylinder to rise, which would hinder the continued filling of the soil and ensure that the soil can enter the inner cylinder smoothly and fully.

[0014] Preferably, the limiting member includes an annular support protrusion coaxially connected to the inner cavity of the outer cylinder;

[0015] The connecting joint includes a connecting sleeve, which is connected to the outer cylinder via a threaded structure, and a limiting protrusion is provided on the top of the inner cavity of the connecting sleeve;

[0016] When the inner cylinder is installed inside the outer cylinder, the bottom end of the inner cylinder abuts against the annular support protrusion, and the upper cover located at the top of the inner cylinder abuts against the limiting protrusion; the first air hole and the second air hole are both offset from the limiting protrusion.

[0017] By adopting the above technical solution, the inner cylinder is limited by the cooperation of the annular support protrusion and the limiting protrusion, which effectively restricts the axial displacement of the inner cylinder in the outer cylinder and avoids the inner cylinder from moving up and down due to impact vibration during the sampling process, thus preventing disturbance to the collected soil samples.

[0018] Preferably, when the bottom end of the inner cylinder abuts against the annular support protrusion, the top end of the inner cylinder and the upper cover extend out of the top end of the outer cylinder.

[0019] By adopting the above technical solution, by extending the top of the inner cylinder out of the outer cylinder, after sampling is completed and the connecting joint is removed from the top of the outer cylinder, the operator can directly remove the inner cylinder from the outer cylinder, which facilitates the transfer of the inner cylinder and the soil sample inside.

[0020] Preferably, an annular limiting protrusion is vertically connected to the inner circumference of the annular support protrusion, and a gap is left between the annular limiting protrusion and the inner circumference of the outer cylinder to form an annular limiting groove, which is used for the inner cylinder end to be inserted.

[0021] By adopting the above technical solution, the inner cylinder end is embedded in the annular limiting groove, which effectively limits the radial shaking of the inner cylinder due to impact during the sampling process and avoids friction and collision between the inner cylinder and the inner wall of the outer cylinder, thus indirectly disturbing the soil sample. At the same time, the annular limiting protrusion can be used to form a physical barrier to the soil, which can limit the soil from directly contacting the threaded structure at the bottom of the inner cylinder during sampling, facilitating the subsequent installation of the lower cover.

[0022] A transport and storage device includes the aforementioned soil sampling structure and a box body, wherein the top of the box body is provided with an opening to form an open end; a plurality of limiting cylinders are vertically supported inside the box body, the limiting cylinders being used for insertion of the inner cylinders.

[0023] By adopting the above technical solution, after the inner cylinder containing the soil sample is installed, the inner cylinder containing the soil sample can be placed into the limiting cylinder inside the box. The limiting cylinder is used to limit and fix the inner cylinder, so as to realize the vertical placement of the inner cylinder. This further avoids the inner cylinder from shaking, colliding or tipping over during subsequent transportation, which would cause disturbance to the soil sample inside the inner cylinder and help to better maintain the integrity of the soil sample.

[0024] Preferably, a support grid is vertically inserted into the inner cavity of the box; the support grid divides the inner cavity of the box into several vertical grooves, and several limiting cylinders are respectively located in several vertical grooves, and the limiting cylinders are all connected to the support grid.

[0025] By adopting the above technical solution, the supporting grid is used to reinforce and limit the several limiting cylinders, which enhances the installation stability of the limiting cylinders and avoids displacement or tilting of the limiting cylinders themselves due to factors such as vehicle bumps during transportation. This is conducive to the inner cylinder containing soil samples being placed more stably inside the limiting cylinder. By inserting the supporting grid into the box, when the inner cylinder is subsequently removed from the box, the supporting grid and the limiting cylinders can be removed together, which facilitates the removal and placement of the inner cylinder and limits the interference between the supporting grid and the limiting cylinders in the removal and placement of the inner cylinder.

[0026] Preferably, the supporting grille is positioned higher than the inner cylinder and the limiting cylinder; a gap is left between the top of the supporting grille and the top opening of the box body; and a snap-fit ​​protrusion is provided at the bottom of the box body.

[0027] When adjacent boxes are stacked one on top of the other, the adjacent boxes are engaged with the opening of the box by means of the snap-fit ​​protrusion.

[0028] By adopting the above technical solution, when stacking the boxes, the bottom locking protrusion of the upper box can be embedded into the opening end of the lower box. The cooperation between the locking protrusion and the opening end of the box is used to limit the upper and lower boxes, so as to prevent the upper and lower boxes from shaking during subsequent transportation, which would cause disturbance to the inner cylinder stored in the box.

[0029] Preferably, the box body is connected to a grip on both opposite sides; the grips on opposite sides of the box body are staggered vertically.

[0030] When adjacent boxes are placed side by side, the grips on the adjacent boxes are stacked one on top of the other.

[0031] By adopting the above technical solution, it is convenient for operators to carry the boxes from both sides. When the boxes are placed side by side, the grips on adjacent boxes can be stacked one on top of the other. This avoids interference between the grips when adjacent boxes are placed side by side. At the same time, the stacked grips can limit the vertical movement of adjacent boxes, preventing subsequent boxes from shaking up and down during transportation and thus preventing disturbance to the soil sample inside the inner cylinder.

[0032] Preferably, the snap-fit ​​protrusions are provided with a plurality of drainage holes corresponding to a plurality of limiting cylinders, the drainage holes are connected to the corresponding limiting cylinders, and the diameter of the drainage holes is smaller than the inner diameter of the limiting cylinders.

[0033] By adopting the above technical solution, the weight of the box can be effectively reduced by using the drainage holes. During use at the construction site, rainwater can be discharged to the outside of the box in a timely manner through the drainage holes at the bottom of the box, which helps to keep the box dry.

[0034] In summary, this application includes at least one of the following beneficial technical effects:

[0035] 1. By setting up an inner and outer cylinder, during sampling, the lower cover of the inner cylinder is removed and the inner cylinder is inserted into the outer cylinder. The outer cylinder works in conjunction with the inner cylinder to collect soil samples. After sampling is completed, the inner cylinder containing the soil sample is removed from the outer cylinder, and the lower cover is installed to the bottom end of the inner cylinder. The inner cylinder, along with the upper and lower covers, stores the soil sample. A new inner cylinder is installed on the outer cylinder to continue sampling. After the soil sample is transferred to the testing location, the upper and lower covers are removed, and the inner cylinder is separated into two half-cylinders to facilitate the removal of the soil sample from the inner cylinder. This effectively ensures the integrity of the soil sample and avoids disturbance to the soil sample during transfer at the construction site, which could affect subsequent testing.

[0036] 2. The inner cylinder is axially limited by the annular support protrusion at the bottom of the inner cavity of the outer cylinder and the limiting protrusion at the connecting joint. On the one hand, it can limit the axial movement of the inner cylinder during the sampling process, which would cause the soil sample to be disturbed. At the same time, the limiting protrusion can ensure that there is a gap between the top of the upper cover and the top of the inner cavity of the connecting sleeve, so that the air inside the inner cylinder can be smoothly discharged through the first air hole and the second air hole on the upper cover during the subsequent sampling process.

[0037] 3. By sliding the support grid into the box, when taking out or putting out the limiting cylinder inside the box, the support grid and the limiting cylinder connected to the support grid can be moved to the outside of the box first, so as to facilitate the taking out or putting out of the limiting cylinder inside the box. Attached Figure Description

[0038] Figure 1 This is a schematic diagram of the overall structure used in this application to illustrate the soil sampling structure.

[0039] Figure 2 This is an explosion diagram used in this application to illustrate the inner cylinder.

[0040] Figure 3 This is an explosion diagram used in this application to illustrate the outer cylinder.

[0041] Figure 4 This is a schematic diagram used in this application to illustrate the state when the inner cylinder is installed inside the outer cylinder.

[0042] Figure 5 This is a schematic diagram used in this application to illustrate the connection relationship between the inner cylinder, the outer cylinder, and the connecting joint.

[0043] Figure 6 This is a schematic diagram used in this application to illustrate the connection relationship between the annular support protrusion and the end of the inner cylinder.

[0044] Figure 7 This is a schematic diagram used in this application to illustrate the container of the transport and storage device.

[0045] Figure 8 This is an exploded schematic diagram used in this application to illustrate the container of the transport and storage device.

[0046] Figure 9 This is a schematic diagram used in this application to illustrate the state when adjacent boxes are stacked one on top of the other.

[0047] Figure 10 This is a schematic diagram used in this application to illustrate the state of adjacent boxes placed side by side.

[0048] Explanation of reference numerals in the attached figures:

[0049] 1. Inner cylinder; 10. Half-cylinder; 101. Positioning protrusion; 102. Positioning groove; 11. Upper cover; 111. First air hole; 12. Lower cover; 2. Outer cylinder; 21. Connecting joint; 210. Second air hole; 211. Connecting sleeve; 212. Limiting protrusion; 22. Drill bit; 23. Annular support protrusion; 24. Annular limiting protrusion; 3. Box body; 31. Limiting cylinder; 32. Support grid; 33. Snap-fit ​​protrusion; 331. Drainage hole; 34. Grip part. Detailed Implementation

[0050] The following is in conjunction with the appendix Figure 1-10 This application will be described in further detail.

[0051] This application discloses a soil sampling structure and a transportation and storage device.

[0052] A soil sampling structure, referring to Figure 1 and Figure 2 It includes an inner cylinder 1 and an outer cylinder 2. The inner cylinder 1 has an upper cover 11 and a lower cover 12 installed at both ends through a threaded structure. The outer cylinder 2 is used for the inner cylinder 1 to be inserted. The outer cylinder 2 has a connecting joint 21 and a drill bit 22 installed at both ends through a threaded structure. The connecting joint 21 is used to connect to the power head of the impact drilling machine, and the drill bit 22 is used to assist the outer cylinder 2 in drilling into the soil layer.

[0053] When sampling using the sampling structure, the lower cover 12 is removed from the end of the inner cylinder 1, and the inner cylinder 1 is installed inside the outer cylinder 2. Then, the drill bits 22 and connecting joints 21 at both ends of the outer cylinder 2 are installed, and the outer cylinder 2 is connected to the impact drilling rig through the connecting joints 21. The impact drilling rig is then used to drive the outer cylinder 2 into the ground to collect soil samples. After sampling is completed, the inner cylinder 1 is removed from the outer cylinder 2, and the lower cover 12 is reinstalled to the end of the inner cylinder 1 so that the soil samples can be stored by the upper cover 11 and the lower cover 12 working together with the inner cylinder 1.

[0054] Reference Figure 1 and Figure 2The inner cylinder 1 is formed by splicing two symmetrically arranged semi-cylindrical parts 10. When transferring soil samples from inside the inner cylinder 1, the inner cylinder 1 can be separated into two semi-cylindrical parts 10 to facilitate the removal of soil samples from inside the inner cylinder 1. The semi-cylindrical parts 10 are made of alloy steel. The side of the two semi-cylindrical parts 10 that is close to each other is the splicing side. The splicing side of the two semi-cylindrical parts 10 is respectively formed with positioning protrusions 101 and positioning grooves 102. The positioning protrusions 101 and positioning grooves 102 are fitted together. When splicing the inner cylinder 1, the positioning protrusions 101 can be embedded into the corresponding positioning grooves 102 to temporarily position the two semi-cylindrical parts 10, which facilitates the smooth installation of the upper cover 11 and the lower cover 12 at both ends of the inner cylinder 1.

[0055] Reference Figure 1 and Figure 3 The outer cylinder 2 is specifically made of alloy steel. The connecting joint 21 includes a connecting sleeve 211 and a hexagonal rod. The hexagonal rod is fixed to the top end of the connecting sleeve 211 and is used to connect the power head of the impact drill. The connecting sleeve 211 is threaded onto the outer circumference of the end of the outer cylinder 2. A limiting component is provided at the bottom of the inner cavity of the outer cylinder 2. When the inner cylinder 1 is installed inside the outer cylinder 2, the limiting component cooperates with the connecting joint 21 to limit the axial movement of the inner cylinder 1. The drill bit 22 specifically adopts the structure of a drill bit 22 configured in existing sampling drill cylinders.

[0056] Reference Figure 4 and Figure 5 The upper cover 11 and the connecting joint 21 are respectively provided with a first air hole 111 and a second air hole 210. When the inner cylinder 1 and the upper cover 11 are installed inside the outer cylinder 2, the first air hole 111 and the second air hole 210 are connected, forming an exhaust channel connecting the inside of the inner cylinder 1 with the external environment. During subsequent sampling, the air inside the inner cylinder 1 can be discharged in time through this channel, avoiding the increase in air pressure inside the inner cylinder 1 due to soil entering, which would hinder the continued filling of soil and ensure that the soil can enter the inner cylinder 1 smoothly and fully.

[0057] Reference Figure 4 and Figure 5 Specifically, the limiting components include an annular support protrusion 23 coaxially connected to the bottom of the inner cavity of the outer cylinder 2; a limiting protrusion 212 protrudes from the top cavity of the inner sleeve 211; when the inner cylinder 1 is installed inside the outer cylinder 2, the bottom end of the inner cylinder 1 abuts against the annular support protrusion 23, and the top cover 11 of the inner cylinder 1 abuts against the limiting protrusion 212. This achieves axial limiting of the inner cylinder 1, preventing the inner cylinder 1 from moving up and down due to impact vibration during sampling, thus avoiding squeezing or rubbing the soil sample.

[0058] The second vent 210 is offset from the limiting protrusion 212. When the inner cylinder 1 is installed inside the outer cylinder 2, the first vent 111 of the top cover 11 of the inner cylinder 1 is offset from the limiting protrusion 212 on the connecting sleeve 211. The limiting protrusion 212 is used to leave a gap between the top cover 11 and the top cavity wall of the inner cavity of the connecting sleeve 211, so that the first vent 111 and the second vent 210 are kept in a stable communication state.

[0059] Reference Figure 4 and Figure 5 When the bottom end of the inner cylinder 1 abuts against the annular support protrusion 23, the top end of the inner cylinder 1 and the upper cover 11 both extend beyond the top of the outer cylinder 2. This design allows operators to directly grasp the top of the inner cylinder 1 and remove it from the outer cylinder 2 after sampling, without the need for additional tools, thus reducing the disturbance to the soil inside the inner cylinder 1 caused by contact and collision between tools and the inner cylinder 1.

[0060] Reference Figure 5 and Figure 6 An annular support protrusion 23 is coaxially connected to an annular limiting protrusion 24 on its inner circumference. A gap exists between the annular limiting protrusion 24 and the inner circumference of the outer cylinder 2 to form an annular limiting groove for the end of the inner cylinder 1 to be inserted. After the end of the inner cylinder 1 is inserted into the annular limiting groove, the contact point between the annular limiting protrusion 24 and the end of the inner cylinder 1 can be sealed using the annular limiting protrusion 24, limiting the soil sample from being squeezed and adhered to the threaded structure at the end of the inner cylinder 1 during subsequent sampling, thus preventing interference with the normal installation of the lower cover 12. Simultaneously, the inner cylinder 1 can be radially limited, restricting radial displacement caused by impact and preventing friction and collision between the inner cylinder 1 and the inner wall of the outer cylinder 2, which could indirectly disturb the soil sample.

[0061] Reference Figure 1 and Figure 7 A transport and storage device includes the aforementioned soil sampling structure and a box 3, which is entirely made of aluminum alloy. The overall height of the box 3 is greater than the length of the inner cylinder 1. The top of the box 3 has an opening, and several limiting cylinders 31 are vertically arranged inside the box 3. The limiting cylinders 31 have openings at both ends for inserting the inner cylinder 1 containing the soil sample. The limiting cylinders 31 are used to limit the storage of the inner cylinder 1 containing the soil sample, preventing disturbance of the soil sample inside the inner cylinder 1 due to external disturbances or bumps during subsequent transport and transfer of the soil sample.

[0062] Reference Figure 7 and Figure 8The inner cavity of the housing 3 is also equipped with a supporting grid 32, which is set higher than the limiting cylinder 31 and the inner cylinder 1. The inner cavity of the housing 3 is divided into several vertical grooves, with a gap between the top of the supporting grid 32 and the opening of the housing 3. The supporting grid 32 divides the inner cavity of the housing 3 into several vertical grooves, and the limiting cylinders 31 are respectively inserted into the corresponding vertical grooves and welded to the supporting grid 32 on their outer periphery. The supporting grid 32 supports and limits the limiting cylinders 31, thereby improving the installation stability of the limiting cylinders 31 and preventing displacement or tilting during subsequent transportation. Simultaneously, it allows the limiting cylinders 31 to be in a relatively isolated space, limiting collisions between adjacent limiting cylinders 31.

[0063] The support grid 32 is inserted into the inner cavity of the box body 3. When the inner cylinder 1 for transferring soil samples is transferred from inside the box body 3 to the outside, the support grid 32 and the limiting cylinder 31 connected to the support grid 32 can be removed first to avoid interference between the support grid 32 and the limiting cylinder 31 and the inner cylinder 1, making it easier to remove the inner cylinder 1 inside the box body 3.

[0064] Reference Figure 7 and Figure 9 The bottom of the box body 3 has a protruding snap-fit ​​protrusion 33, with a gap between the outer periphery of the snap-fit ​​protrusion 33 and the outer periphery of the box body 3. The snap-fit ​​protrusion 33 can be inserted into the opening end of the top of the box body 3. When the boxes 3 are stacked, the snap-fit ​​protrusion 33 of the upper box body 3 can be inserted into the opening end of the lower box body 3. The engagement between the snap-fit ​​protrusion 33 and the opening end of the box body 3 limits the movement of adjacent boxes 3, thus preventing the upper and lower boxes 3 from shaking during subsequent transportation. When the snap-fit ​​protrusion 33 of the upper box body 3 is inserted into the opening end of the lower box body 3, the snap-fit ​​protrusion 33 of the upper box body 3 abuts against the top of the support grid 32 of the lower box body 3.

[0065] The snap-fit ​​protrusion 33 has several drainage holes 331 corresponding to several limiting cylinders 31. The drainage holes 331 are respectively opposite to and connected to several limiting cylinders 31. The diameter of the drainage holes 331 is smaller than the inner diameter of the limiting cylinders 31. When the box 3 is used at the construction site, the drainage holes 331 can be used to drain water vapor or rainwater from the box 3 in a timely manner, which helps to keep the inside of the box 3 dry.

[0066] Reference Figure 7 and Figure 10Each box 3 has a gripping part 34 connected to both opposite sides, facilitating the handling of the box 3 by operators. The gripping parts 34 on both sides of the box 3 are staggered vertically. When adjacent boxes 3 are placed side by side, the gripping parts 34 on the closest side of the adjacent boxes 3 are stacked vertically. This design avoids interference between the gripping parts 34 of adjacent boxes 3, saving space for side-by-side storage. Furthermore, the stacked gripping parts 34 limit the movement of adjacent boxes 3, preventing them from shaking during subsequent transportation and indirectly reducing disturbance to the soil sample inside the inner cylinder 1.

[0067] The implementation principle of this application embodiment is as follows:

[0068] During sampling, the lower cover 12 of the inner cylinder 1 is removed first, the inner cylinder 1 is inserted into the inner cavity of the outer cylinder 2, and the connecting joint 21 is installed to the top of the outer cylinder 2. After the outer cylinder 2 is connected to the power head of the impact drilling rig through the connecting joint 21, the impact drilling rig is used to drive the outer cylinder 2 and the inner cylinder 1 into the ground together. The soil enters the inner cylinder 1 under the action of impact pressure to complete the soil sampling.

[0069] After sampling is completed, remove the connecting joint 21 at the top of the outer cylinder 2, remove the inner cylinder 1 from the outer cylinder 2, and reinstall the lower cover 12 to the bottom of the inner cylinder 1; finally, insert the inner cylinder 1 containing the soil sample into the corresponding limiting cylinder 31 inside the box 3; the outer cylinder 2 continues to be sampled by installing other inner cylinders 1.

[0070] Compared to traditional soil sampling methods, this application uses the inner cylinder 1 in conjunction with the upper cover 11 and the lower cover 12 to directly retain the original soil sample. At the same time, by configuring the box 3 for storing the inner cylinder 1, the inner cylinder 1 is further restricted, which effectively reduces the disturbance of the soil sample during transportation, ensures the integrity of the soil sample, and improves the accuracy of subsequent soil sample test data.

[0071] 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 sampling structure comprising an inner cylinder (1) and an outer cylinder (2), characterized in that: the inner cylinder (1) is formed by two symmetrical half-cylinder pieces (10) connected together, and the two ends of the inner cylinder (1) are respectively connected with an upper cover body (11) and a lower cover body (12) through a threaded structure; the outer cylinder (2) is used for inserting the inner cylinder (1), and the two ends of the outer cylinder (2) are respectively connected with a connecting joint (21) and a drill bit (22) through a threaded structure, the connecting joint (21) is used for connecting the power head of a percussion drill, and the drill bit (22) is used for assisting the outer cylinder (2) to drill into the soil layer; a limiting piece is arranged at the bottom of the inner cavity of the outer cylinder (2), when the inner cylinder (1) is installed in the inner cavity of the outer cylinder (2), the limiting piece cooperates with the connecting joint (21) to limit the inner cylinder (1) to limit the axial movement of the inner cylinder (1); the upper cover body (11) and the connecting joint (21) are respectively provided with a first air hole (111) and a second air hole (210), when the inner cylinder (1) is installed in the outer cylinder (2), the first air hole (111) and the second air hole (210) are communicated; the limiting piece comprises an annular support protrusion (23) coaxially connected in the inner cavity of the outer cylinder (2); the connecting joint (21) comprises a connecting sleeve (211), the connecting sleeve (211) is connected with the outer cylinder (2) through a threaded structure, and a limiting protrusion (212) is protruded at the top of the inner cavity of the connecting sleeve (211); when the inner cylinder (1) is installed in the outer cylinder (2), the bottom end of the inner cylinder (1) abuts against the annular support protrusion (23), and the upper cover body (11) at the top end of the inner cylinder (1) abuts against the limiting protrusion (212); the first air hole (111) and the second air hole (210) are arranged away from the limiting protrusion (212).

2. A soil sampling structure according to claim 1, wherein: when the bottom end of the inner cylinder (1) abuts against the annular support protrusion (23), the top end of the inner cylinder (1) and the upper cover body (11) protrude out of the top end of the outer cylinder (2).

3. The soil sampling structure of claim 1, wherein: the inner circumferential side of the annular support protrusion (23) is vertically connected with an annular limiting protrusion (24), the annular limiting protrusion (24) leaves a gap with the inner circumferential side of the outer cylinder (2) to form an annular limiting groove, and the annular limiting groove is used for embedding the end of the inner cylinder (1).

4. A transport storage device characterized by: The soil sampling structure according to any one of claims 1-3 further comprises a box body (3), the top of the box body (3) is provided with an opening to form an open end; a plurality of limiting cylinders (31) are vertically arranged in the box body (3), and the limiting cylinders (31) are used for inserting the inner cylinder (1).

5. A transport and storage device according to claim 4, wherein: a support grid (32) is vertically inserted into the inner cavity of the box body (3); the support grid (32) divides the inner cavity of the box body (3) into a plurality of vertical groove bodies, and the limiting cylinders (31) are respectively arranged in the vertical groove bodies, and the limiting cylinders (31) are connected with the support grid (32).

6. A transport and storage device according to claim 5, wherein: The support grid (32) is arranged above the inner cylinder (1) and the limiting cylinder (31); the top end of the support grid (32) is spaced from the open top end of the box body (3); the bottom end of the box body (3) is provided with a clamping protrusion (33); When the adjacent box bodies (3) are stacked up and down, the adjacent box bodies (3) are inserted and matched through the clamping protrusion (33) and the open end of the box body (3).

7. A transport and storage device according to claim 5, wherein: The opposite sides of the box body (3) are connected with holding portions (34); the holding portions (34) on the opposite sides of the box body (3) are arranged staggered up and down. When the adjacent box bodies (3) are placed side by side, the holding portions (34) on the adjacent sides of the box bodies (3) are arranged stacked up and down.

8. A transport and storage device according to claim 6, wherein: The clamping protrusion (33) is provided with a plurality of drainage holes (331) corresponding to a plurality of limiting cylinders (31); the drainage holes (331) are in communication with the corresponding limiting cylinders (31); and the diameter of the drainage holes (331) is smaller than the inner diameter of the limiting cylinders (31).

Images