A comprehensive operating platform for soil and groundwater sample collection and rapid detection

Abstract

This invention provides a comprehensive operating platform for soil and groundwater sample collection and rapid testing, relating to the field of soil testing technology. It includes a positioning sleeve and positioning strip that work together to seal the bottom of the soil sample and prevent leakage. A telescopic mechanism, through the cooperation of a transverse sleeve, rotating sleeve, adjusting wheel, rack, lever, base, outer sleeve, follower tube, spinning disc, side hole, shrinkage groove, push block, follower block, side groove, push spring, and push disc, enables the segmented pressing and linkage locking of the outer tube. The operating platform utilizes the self-locking of the push block and the outer tube to achieve segmented advancement, and uses the rotation of the inner tube to drive the converging plate to radially close and seal the sample. The positioning sleeve switches the relative movement state of the inner and outer tubes, effectively preventing sample leakage during soil sampling and improving the efficiency and reliability of multi-point sampling.

Description

Technical Field

[0001] This invention relates to the field of soil testing technology, and more specifically, to a comprehensive operating platform for soil and groundwater sample collection and rapid testing. Background Technology

[0002] In existing technologies, soil testing typically requires the vertical insertion of a sampling tube into the target soil layer to obtain a columnar undisturbed soil sample, and the operation is repeated at multiple points to ensure the representativeness of the test results. However, most existing sampling tubes are straight cylindrical structures with openings at both ends. When the tube is pulled upwards from the soil, the opening at the bottom of the tube lacks effective sealing. Under the combined effects of gravity and friction between the tube wall and the soil, the soil sample inside the tube is very likely to slip and leak from the bottom, leading to sampling failure or disordered sample stratification.

[0003] Such leakage problems can lead to a number of adverse consequences in actual sampling operations. On the one hand, operators have to repeatedly collect samples or re-drill to obtain sufficient and complete soil samples, which greatly increases the workload and sampling time in the field. On the other hand, the soil loss caused by sample leakage will directly destroy the original stratum structure of the soil column, making it impossible for subsequent physicochemical analysis results to truly reflect the differences in the depth direction of the soil layer, thus seriously affecting the accuracy, comparability and overall sampling efficiency of soil test data. Summary of the Invention

[0004] (a) Technical problems to be solved To address the problems existing in the prior art, the present invention provides a comprehensive operating platform for soil and groundwater sample collection and rapid detection, thereby solving the technical problems mentioned in the background art.

[0005] (II) Technical Solution To achieve the above objectives, the present invention provides the following technical solution: a comprehensive operating platform for soil and groundwater sample collection and rapid detection, comprising an operating platform body; and further comprising a sampling mechanism and a telescopic mechanism; The sampling mechanism includes two coaxially arranged inner tubes and outer tubes. The inner tube is sleeved on the inner wall of the outer tube. The lower end of the inner tube is provided with equal-spaced gathering pieces, and there is a fixed spacing between the gathering pieces. A pull rope is connected to the middle position of the gathering pieces. The other end of the pull rope is connected to the inner wall of the outer tube. The length of each pull rope is less than the inner diameter of the outer tube. The telescopic mechanism includes a transverse sleeve mounted on the operating table body, a rotating sleeve rotatably disposed inside the transverse sleeve, an adjusting wheel coaxially disposed inside the rotating sleeve, and a rack slidably disposed inside the transverse sleeve, with the adjusting wheel meshing on the rack.

[0006] Preferably, the lower end of the outer tube is provided with a ring cutter, which is always located at the lower end of the plurality of gathering pieces.

[0007] Preferably, the inner wall of the outer tube is provided with a plurality of external grooves at equal intervals, the outer wall of the inner tube is provided with a plurality of internal grooves at equal intervals, a positioning sleeve is sleeved between the inner tube and the outer tube, and positioning strips are provided at equal intervals inside the positioning sleeve.

[0008] Preferably, the telescopic mechanism further includes a through hole formed in the rotating sleeve, and a lever is slidably disposed in the through hole.

[0009] Preferably, a base is fixedly provided at the lowest end of the rack, and two outer sleeves are symmetrically provided at the upper end of the base. A follower tube is rotatably provided within the two outer sleeves, and the follower tube and the base are coaxially arranged.

[0010] Preferably, a spinning disc is threaded onto the outer wall of the follower tube, and a plurality of lateral holes are equally spaced on the outer wall of the spinning disc, the diameter of each lateral hole being the same as the diameter of the lever.

[0011] Preferably, the inner wall of the follower tube is provided with multiple shrinkage grooves at equal intervals, and each shrinkage groove is slidably connected to a push block, and the sides of the multiple push blocks near the axis are attached to the outer tube.

[0012] Preferably, the push block is provided with a follower block, and the outer wall of the follower tube is provided with a plurality of lateral grooves corresponding to the shrinkage groove. The follower block is slidably connected in the lateral groove, and the spinning disc abuts against the plurality of follower blocks.

[0013] Preferably, a push spring is coaxially arranged inside the follower tube, and a push plate is arranged on the multiple push springs, with the push plate abutting against the multiple push blocks.

[0014] Preferably, the inner diameter of the pusher plate is larger than the outer diameter of the outer tube.

[0015] (III) Beneficial Effects Compared with existing technologies, the present invention provides a comprehensive operating platform for soil and groundwater sample collection and rapid detection, which has the following advantages: This invention fundamentally solves the problem of soil samples slipping and leaking from the bottom when the sampling tube is pulled out by the linkage and sealing structure of the gathering plates and pull ropes in the sampling mechanism. When the inner tube rotates relative to the outer tube and moves down to the limit of the pull rope length, the pull rope applies a radial inward pulling force to multiple gathering plates, forcing the gathering plates to elastically deform and gather towards the axis, thereby pressing and sealing the bottom of the soil sample in the tube. At the same time, the staggered pull ropes form a grid-like barrier layer between the gathering plates, further preventing the leakage of fine soil particles. This mechanical gathering and sealing method does not rely on external seals or auxiliary tools. The sample can be automatically locked after sampling, allowing the operator to directly pull out the sampling tube without worrying about sample loss or stratification disturbance, which significantly improves the success rate of undisturbed soil sample collection and stratification fidelity.

[0016] The telescopic mechanism constructed in this invention achieves segmented and smooth insertion of the outer tube through a one-way self-locking engagement between the push block and the outer tube. This effectively overcomes the shortcomings of large resistance and difficult operation in single long-stroke insertion. The operator drives the rack and base to move downwards a certain distance by rotating the rotating sleeve with a lever, and then rotates in the opposite direction to make the follower tube retract upwards while the outer tube remains stationary due to self-locking. Repeating the operation can gradually press the outer tube into the predetermined depth. This segmented advancement method decomposes the large resistance into multiple small resistance steps, significantly reducing the downward pressure required for a single operation, making manual sampling more labor-saving and controllable. At the same time, the self-locking structure ensures that the outer tube will not spring back during each retraction process, ensuring the accuracy and consistency of the sampling depth.

[0017] This invention achieves flexible control of the relative motion state between the inner and outer tubes through the switching design of the positioning sleeve and the positioning strip. During the sample sealing stage, the positioning strip only engages with the inner groove of the inner tube and not with the outer groove of the outer tube, allowing the inner tube to rotate independently relative to the outer tube to achieve closure. After sealing is completed, the positioning sleeve is pushed downward by the telescopic mechanism to simultaneously engage with the positioning strip in both the inner and outer grooves, locking the inner and outer tubes together for easy removal as a whole. This phased motion control allows the same sampling mechanism to sequentially complete the two functions of "independent rotation sealing" and "joint locking removal". The structure is compact and the operation logic is clear, avoiding complex external auxiliary devices.

[0018] This invention integrates the sealing function of the sampling mechanism and the segmented propulsion function of the telescopic mechanism onto the same operating platform. The operator can complete all operations by levering and rotating the sleeve without the need for an external power source. It is particularly suitable for rapid sampling operations in the field. At the same time, the operating platform is also compatible with groundwater sampling tools such as Bayle tubes to achieve integrated collection of water and soil samples. It provides an efficient, reliable, and portable comprehensive sampling solution for soil and groundwater environmental monitoring, which greatly improves the efficiency and sample quality of multi-point sampling work. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of a comprehensive operating platform for soil and groundwater sample collection and rapid detection in this invention. Figure 2 This is a schematic diagram of the structure of the adjusting wheel and rack in this invention; Figure 3 This is a schematic diagram of the structure of the base and the follower tube in this invention; Figure 4 This is a schematic diagram of the servo tube in this invention; Figure 5 This is a cross-sectional view of the follower tube in this invention; Figure 6 This is a schematic diagram of the structure of the external tube in this invention; Figure 7 This is a cross-sectional view of the external tube in this invention. Figure 8 In this invention Figure 7 Schematic diagram of the lower section structure; Figure 9 In this invention Figure 7 A schematic diagram of the sectional structure at the top; Figure 10 This is a schematic diagram of the internal tube structure in this invention; Figure 11 This is a schematic diagram of the internal tube and pull rope in this invention.

[0020] In the diagram: 11. Operating table body; 21. Sampling mechanism; 22. Inner tube; 23. Outer tube; 24. Gathering plate; 25. Pull rope; 26. Ring cutter; 27. Outer groove; 28. Inner groove; 29. ​​Positioning sleeve; 31. Telescopic mechanism; 32. Lateral sleeve; 33. Rotating sleeve; 34. Adjusting wheel; 35. Rack; 36. Through hole; 37. Lever; 38. Base; 39. Outer sleeve; 210. Positioning strip; 310. Follower tube; 311. Spinning plate; 312. Side hole; 313. Shrinkage groove; 314. Push block; 315. Follower block; 316. Side groove; 317. Push spring; 318. Push plate. Detailed Implementation

[0021] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0022] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0023] In this invention, unless otherwise stated, the directional terms such as "up" and "down" generally refer to the directions shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" generally refer to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not intended to limit this invention.

[0024] Please see Figures 1 to 11 This embodiment provides a comprehensive operating platform for soil and groundwater sample collection and rapid testing. This platform aims to solve the technical problems of soil sample leakage from the bottom when the sampling tube is pulled out and the low efficiency of multi-point sampling. By integrating a sampling mechanism with a retractable and leak-proof function and a telescopic mechanism that can be segmented and locked, the platform achieves in-situ sealing of soil samples and segmented insertion of the external tube, effectively avoiding sample leakage and improving the convenience and reliability of sampling operations.

[0025] 1. Overall structure and initial state The integrated operating platform for soil and groundwater sample collection and rapid testing includes an operating platform body 11 as a supporting foundation, and a sampling mechanism 21 and a telescopic mechanism 31 installed on the operating platform body 11. The sampling mechanism 21 is used to insert into the soil and seal the sample, and the telescopic mechanism 31 is used to drive the sampling mechanism 21 to enter the soil layer in sections and provide a linkage locking function.

[0026] 2. Composition of the core system 2.1 Sampling Mechanism 21 The sampling mechanism 21 is the core unit for soil sample collection and leak-proof sealing. It includes two coaxially arranged inner tubes 22 and outer tubes 23. The inner tube 22 is sleeved on the inner wall of the outer tube 23 and can slide relative to it. The lower end of the inner tube 22 is provided with multiple elastic gathering pieces 24 at equal intervals, with gaps between adjacent gathering pieces 24. A pull rope 25 is connected to the middle position of each gathering piece 24. The other end of the multiple pull ropes 25 is fixedly connected to the inner wall of the outer tube 23. The length of each pull rope 25 is slightly smaller than the inner diameter of the outer tube 23. The lower end of the outer tube 23 is fixedly provided with a ring cutter 26, which is always located below the multiple gathering pieces 24. The inner wall of the outer tube 23 is provided with multiple external grooves 27 at equal intervals, and the outer wall of the inner tube 22 is provided with multiple internal grooves 28 at equal intervals. A positioning sleeve 29 is sleeved between the inner tube 22 and the outer tube 23. Multiple positioning strips 210 are fixedly provided at equal intervals inside the positioning sleeve 29.

[0027] 2.2 Telescopic Mechanism 31 The telescopic mechanism 31 is the core unit that drives the sampling mechanism 21 to enter the soil layer in sections and achieves linkage control. It includes a transverse sleeve 32 installed on the operating platform body 11. A rotating sleeve 33 is rotatably arranged inside the transverse sleeve 32. An adjusting wheel 34 is coaxially arranged inside the rotating sleeve 33. A rack 35 is slidably arranged inside the transverse sleeve 32, and the adjusting wheel 34 is engaged with the rack 35. A through hole 36 is opened inside the rotating sleeve 33, and a lever 37 for manual drive is slidably arranged inside the through hole 36. A base 38 is fixedly arranged at the lower end of the rack 35. Two outer sleeves 39 are symmetrically fixed at the upper end of the base 38. A follower tube 310 is rotatably arranged inside the two outer sleeves 39, and the follower tube 310 is coaxially arranged with the base 38. A spinning disc 311 is threadedly connected to the outer wall of the follower tube 310. Multiple lateral holes 312 are equally spaced on the outer wall of the spinning disc 311. The diameter of each lateral hole 312 matches the diameter of the lever 37. Multiple contraction grooves 313 are evenly spaced on the inner wall of the follower tube 310. A push block 314 is slidably connected in each contraction groove 313, and the side of the multiple push blocks 314 near the axis is attached to the outer wall of the outer tube 23. A follower block 315 is fixedly installed on the push block 314. Multiple lateral grooves 316 corresponding to the contraction grooves 313 are opened on the outer wall of the follower tube 310, and the follower block 315 is slidably connected in the lateral grooves 316. The lower end face of the spinning disc 311 abuts against the upper end face of the multiple follower blocks 315. Multiple push springs 317 are coaxially arranged in the follower tube 310, and a push plate 318 is provided at the upper end of the multiple push springs 317. The upper end face of the push plate 318 abuts against the lower end face of the multiple push blocks 314. The inner diameter of the push plate 318 is larger than the outer diameter of the outer tube 23 to allow the outer tube 23 to pass through.

[0028] 3. Working process and principle of the device The sampling and leak prevention process of the integrated operating platform for soil and groundwater sample collection and rapid testing is as follows: When sampling soil, the operator first inserts the outer tube 23 into the follower tube 310. Under the elastic force of the push spring 317, the push plate 318 pushes the push block 314 upward, causing it to move along the shrinkage groove 313 towards the axis. This makes the multiple push blocks 314 closely abut against the outer wall of the outer tube 23 to form a one-way self-locking. At this time, when the follower tube 310 is pushed downward, the outer tube 23 moves downward synchronously with it. When it is pulled upward, the outer tube 23 is self-locked and fixed.

[0029] The operator inserts lever 37 into through hole 36 and rotates rotating sleeve 33. Rotating sleeve 33 drives adjusting wheel 34 to rotate, driving rack 35 and base 38 to move downward. Base 38 drives follower tube 310 and outer tube 23 downward into the soil through outer sleeve 39. Since the stroke of rack 35 is limited, when outer tube 23 is partially inserted, the operator rotates rotating sleeve 33 in the opposite direction to move base 38 upward. At this time, the self-locking action of push block 314 keeps outer tube 23 stationary while follower tube 310 moves upward. The above operation is repeated until outer tube 23 is pressed in segment by segment to the predetermined sampling depth.

[0030] When encountering soil that is hard or dense, making it difficult for the soil to naturally squeeze into the gaps between the sample collection plates, the operator can take the following auxiliary sampling steps: After the outer tube 23 is pressed into the target depth in sections, the rotation and retraction operation of the inner tube 22 is not performed first. Instead, the lever 37 is inserted into the side hole 312 of the spinning disc 311 and rotated slightly in the opposite direction. This causes the follower tube 310 to drive the outer tube 23 to generate a small-amplitude reciprocating rotational vibration. The ring cutter 26 is used to cut and disturb the bottom soil in situ, causing the outer layer of dense soil and the outer wall of the outer tube 23 to loosen. In addition, as a modified embodiment of this example, the gap of the gathering plate 24 can be pre-sprayed or impregnated with a lubricating and drag-reducing coating, or a small amount of water can be injected into the borehole before the external tube 23 is pressed in to reduce soil cohesion, thereby ensuring that the hard soil sample can be smoothly filled into the tube space above the gathering plate 24.

[0031] Once the outer tube 23 reaches the predetermined depth, the operator needs to seal the lower end of the inner tube 22 to prevent sample leakage. First, move the push block 314 in the follower tube 310 to the corresponding position of the positioning sleeve 29. Then, pull out the lever 37 from the through hole 36 and insert it into the lateral hole 312 on the spinning plate 311. Rotate the lever 37 to drive the spinning plate 311 to rotate and rise along the thread of the follower tube 310. The spinning plate 311 pushes the follower block 315 and the push block 314 upward, causing the push block 314 to radially shrink along the shrinkage groove 313 and lock onto the positioning sleeve 29, thereby driving the positioning sleeve 29 to rotate synchronously. Since the positioning strip 210 in the positioning sleeve 29 is only locked into the inner groove 28 of the inner tube 22 and not into the outer groove 27 of the outer tube 23, the rotation of the positioning sleeve 29 only drives the inner tube 22 to rotate and move downward relative to the outer tube 23.

[0032] The initial position of the inner tube 22 leaves the pull rope 25 in a slack state. As the inner tube 22 rotates and moves downward, the pull rope 25 is gradually straightened and tightened. When the inner tube 22 moves downward to the limit of the pull rope 25's length, continued rotation will cause the pull rope 25 to apply a radial inward pulling force to the gathering plates 24, forcing multiple gathering plates 24 to undergo elastic deformation and gather towards the axis, thereby pressing and sealing the bottom of the soil sample inside the tube. At the same time, the staggered pull ropes 25 also form a grid-like barrier structure to further prevent soil leakage. Subsequently, the operator continues to rotate the lever 37 to make the inner tube 25 slack. The inner tube 22 drives the outer tube 23 to rotate against the soil friction resistance, releasing the outer tube 23 from the surrounding soil. Then, the lever 37 is inserted into the through hole 36 and the rotating sleeve 33 is rotated to move the base 38 downward, causing the positioning sleeve 29 to move downward and the positioning strip 210 to simultaneously engage with the outer groove 27 and the inner groove 28, locking the inner tube 22 and the outer tube 23 into one unit. At this time, the operator can directly pull the entire sampling mechanism upward. The soil sample inside the tube will not leak under the double sealing of the gathering plate 24 and the pull rope 25, thus completing the collection of the soil sample.

[0033] When groundwater sampling is required, the operator can use a Bayer tube to collect groundwater samples within the pre-formed sampling well, thereby completing the comprehensive sampling process.

[0034] Working principle summary: This invention achieves bottom sealing of soil samples through the linkage of the gathering plate 24 and the pull rope 25 in the sampling mechanism 21, and achieves step-by-step pressing of the outer tube 23 through the self-locking and segmented advancement of the push block 314 in the telescopic mechanism 31, and achieves relative rotation and locking of the inner tube 22 and the outer tube 23 through the switching of the positioning sleeve 29 and the positioning strip 210. The three mechanisms work together to make the sampling process convenient, the sample intact and leak-free, and significantly improve the efficiency and reliability of soil and groundwater sampling operations.

[0035] Example 2 In another optional embodiment, the number of gathering plates 24 can be increased or decreased according to the required sampling diameter, the length of the pull rope 25 can be adjusted by changing the connection point position to adapt to the sample sealing requirements of different depths, the contact surface between the push block 314 and the outer tube 23 can be provided with anti-slip texture to enhance self-locking friction, a torque limiter can be provided on the spinning plate 311 to prevent overload damage, and a level can be added to the operating table body 11 to ensure sampling verticality.

[0036] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

[0037] Of all the solutions mentioned above, those involving the connection between two components can be selected according to the actual situation, such as welding, bolt and nut connection, bolt or screw connection, or other known connection methods, which will not be elaborated here. For all the fixed connections mentioned above, welding is preferred. Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A comprehensive operating platform for soil and groundwater sample collection and rapid detection, including an operating platform body (11) and a sampling mechanism (21) and a telescopic mechanism (31). The sampling mechanism (21) includes two coaxially arranged inner tubes (22) and outer tubes (23), with the inner tubes (22) sleeved on the inner wall of the outer tubes (23); its characteristic is: The lower end of the inner tube (22) is provided with equal spacing of gathering pieces (24), and there is a fixed spacing between the multiple gathering pieces (24). A pull rope (25) is connected to the middle position of the gathering piece (24), and the other end of the multiple pull ropes (25) is connected to the inner wall of the outer tube (23). The length of each pull rope (25) is less than the inner wall diameter of the outer tube (23). The telescopic mechanism (31) includes a transverse sleeve (32) mounted on the operating table body (11). A rotating sleeve (33) is rotatably disposed inside the transverse sleeve (32). An adjusting wheel (34) is coaxially disposed inside the rotating sleeve (33). A rack (35) is slidably disposed inside the transverse sleeve (32). The adjusting wheel (34) meshes with the rack (35). The telescopic mechanism (31) also includes a through hole (36) opened in the rotating sleeve (33). A lever (37) is slidably disposed inside the through hole (36). A base (38) is fixedly disposed at the lowermost end of the rack (35). Two outer sleeves (39) are symmetrically disposed at the upper end of the base (38). The two outer sleeves (39) are equipped with a follower tube (310) for limited rotation. The follower tube (310) and the base (38) are coaxially arranged. The outer wall of the follower tube (310) is threaded with a spinning plate (311). The outer wall of the spinning plate (311) is provided with multiple side holes (312) at equal intervals. The diameter of each side hole (312) is the same as the diameter of the lever (37). The inner wall of the follower tube (310) is provided with multiple shrinkage grooves (313) at equal intervals. Each shrinkage groove (313) is slidably connected with a push block (314). The sides of the multiple push blocks (314) close to the axis are attached to the outer tube (23).

2. The integrated operating platform for soil and groundwater sample collection and rapid detection according to claim 1, characterized in that: The lower end of the outer tube (23) is provided with a ring cutter (26), which is always located at the lower end of the plurality of gathering pieces (24).

3. The integrated operating platform for soil and groundwater sample collection and rapid detection according to claim 2, characterized in that: The inner wall of the outer tube (23) is provided with multiple external grooves (27) at equal intervals, and the outer wall of the inner tube (22) is provided with multiple internal grooves (28) at equal intervals. A positioning sleeve (29) is sleeved between the inner tube (22) and the outer tube (23), and positioning strips (210) are provided at equal intervals inside the positioning sleeve (29).

4. The integrated operating platform for soil and groundwater sample collection and rapid detection according to claim 3, characterized in that: The push block (314) is provided with a follower block (315), and the outer wall of the follower tube (310) is provided with a plurality of side grooves (316) corresponding to the shrinkage groove (313). The follower block (315) is slidably connected in the side groove (316), and the spinning disc (311) abuts against the plurality of follower blocks (315).

5. The integrated operating platform for soil and groundwater sample collection and rapid detection according to claim 4, characterized in that: A push spring (317) is coaxially arranged inside the follower tube (310), and a push plate (318) is arranged on a plurality of push springs (317), and the push plate (318) abuts against a plurality of push blocks (314).

6. The integrated operating platform for soil and groundwater sample collection and rapid detection according to claim 5, characterized in that: The inner diameter of the push plate (318) is larger than the outer diameter of the outer tube (23).

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