Sandy soil undisturbed sample sampling device for engineering geological investigation
Through the combined design of the support frame, lifting cylinder and cutting barrier structure, the problem of damage and disturbance of sand and soil sample structure in the traditional sampling method is solved, and the integrity and originality of sand and soil sample are guaranteed.
Patent Information
- Application Number
- CN202510573198.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-06
- Publication Date
- 2025-08-01
AI Technical Summary
In the prior art, the traditional hammer sampling method causes the original structure of the sandy soil sample to be destroyed, and disturbances are easily generated during the sampling process, making it difficult to ensure the original nature of the soil sample.
The combination design of the support frame, lifting cylinder, fixed structure, rotating structure and cutting barrier structure is adopted. The fixing block cooperates with the support frame chute to achieve height adjustment and lifting functions; the rotating structure drives the cutting knife to cut off excess sand and soil, and the fixing ring increases the contact area to stabilize the device.
It effectively avoids the scattering and disturbance of sand and soil during the sampling process, ensures the integrity and originality of the soil sample, and improves the sampling quality and accuracy.
Smart Images
Figure CN120404224A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of geological exploration, and specifically to a sampling device for undisturbed sand samples in engineering geological exploration. Background Art
[0002] In the fields of geological exploration, soil research, environmental monitoring, etc., it is often necessary to take undisturbed samples of rocks, soils, glaciers, snow, etc. An undisturbed sample refers to a sample taken using regional devices without being disturbed by external forces and maintaining the original structure.
[0003] In the prior art, when sampling sand in engineering geological exploration, traditional sampling devices usually drive the sampling tube into the soil by hammering. This method uniformly causes the sampling tube to tilt and shift, and the vibration generated by hammering will damage the original structural system, resulting in changes in the arrangement of sand particles and pore structure, making it difficult to ensure the undisturbed nature of the soil sample, and even possibly causing sampling failure. Moreover, during the process of taking out the soil sample, the adsorption force generated in the sealing device will inevitably disturb the soil sample in the device, further affecting the undisturbed nature of the soil sample.
[0004] Therefore, a sampling device for undisturbed sand samples in engineering geological exploration is proposed. Summary of the Invention
[0005] The purpose of the present invention is to provide a sampling device for undisturbed sand samples in engineering geological exploration to solve the problems raised in the above background art.
[0006] To achieve the above purpose, the present invention provides the following technical solution: A sampling device for undisturbed sand samples in engineering geological exploration, including a support frame and a lifting cylinder, the bottom end of which is a conical structure. A chute is provided on the outer wall of one side of the support frame, and limiting holes are equidistantly provided on the outer side of the front. A fixing block is slidably arranged in the chute. The fixing block is a convex-shaped structure and is divided into a first end face and a second end face. A fixing hole coaxial with the limiting hole is provided on the first end face;
[0007] A fixing structure is arranged at the bottom end of the support frame for fixing and lifting the lifting cylinder;
[0008] A rotating structure is arranged on the outer wall of the fixing structure for rotating the cutting and blocking structure;
[0009] A cutting and blocking structure is arranged at the bottom end of the fixing structure for cutting off the excess sand during sampling and keeping it intact;
[0010] A fixing ring is arranged below the cutting and blocking structure for supporting with the ground and increasing the contact surface.
[0011] Preferably, the fixing structure includes a fixing cylinder, the outer wall of the fixing cylinder is connected to the fixing block, a guide rod is arranged on one side of the bottom end of the top of the support frame, a threaded rod is arranged on the other side, and connecting sleeves are arranged on the outer walls of the threaded rod and the guide rod, and a limiting block is installed at the ends of the threaded rod and the guide rod.
[0012] Preferably, a motor is arranged at the top end of the support frame, the output end of the motor is fixedly connected with a rotating shaft, the end of the rotating shaft penetrates through the bottom end of the support frame and is connected with a gear, and pressing handles are arranged on the outer walls of both sides of the support frame near the top end.
[0013] Preferably, the rotating structure includes a semi-circular rotating ring and a connecting ring, the connecting rings are equidistantly distributed at the top and bottom ends of the fixing cylinder, a connecting plate is arranged on the inner wall of the center of the rotating ring and the connecting ring, a semi-circular rack is installed on the outer wall of one side of the connecting plate, the semi-circular rack is meshed and connected with the gear, and a blocking strip is installed at the end of the connecting plate.
[0014] Preferably, a lead screw is arranged at the center of the top end of the support frame, a concave block is installed at the end of the lead screw, a ring cutter is arranged on the outer wall of the concave block, and a lower pressing plate is arranged at the bottom end of the concave block. A pressing rod is arranged at the center of the top end of the lower pressing plate, the pressing rod is located in the inner wall of the center of the lead screw, and a rotating rod is connected to the bottom end. A rotating handle is arranged on the outer wall of the top end of the lead screw.
[0015] Preferably, the cutting and blocking structure includes a connecting block, the connecting block is located below the fixing cylinder, and the connecting block is connected with the blocking strip. A through hole is opened at the center position of the top end of the connecting block, and sliding holes are equidistantly distributed on the top end of the connecting block.
[0016] Preferably, the connecting block is of a hollow structure, and a sliding groove is opened on the inner wall of the bottom end of the connecting block. The sliding groove is of a hexagonal structure, fixing rods are arranged in both the sliding groove and the through hole, and a cutting knife is arranged between the fixing rods.
[0017] Compared with the prior art, the beneficial effects of the present invention are as follows:
[0018] For this engineering geological exploration sand original sample sampling device, the fixing cylinder in the fixing structure is connected to the support frame through the fixing block, and the fixing block can slide in the sliding groove of the support frame and is fixed through the fixing hole matched with the limiting hole, which is convenient for adjusting the height of the sampling device. At the same time, the connecting sleeves on the threaded rod and the guide rod can assist in fixing and realizing the lifting function, so that the sampling device can adapt to different sampling depth requirements, and the operation is flexible and convenient. <00>
[0019] Meanwhile, the semi-circular rotating ring and the connecting ring in the rotating structure are connected by a connecting plate. The semi-circular rack on the connecting plate cooperates with the gear, enabling precise rotation of the rotating structure. When the rotating structure rotates, it drives the connecting block and the cutting and blocking structure to rotate, and the cutting knife can cut off the excess sand and soil during sampling, effectively avoiding the scattering and interference of sand and soil during the sampling process, ensuring the integrity and original state of the soil sample taken. At the same time, structures such as the connecting block can also play a certain blocking role to prevent the surrounding sand and soil from mixing in during the sampling process, further improving the quality of the soil sample.
[0020] Secondly, the fixing ring is arranged below the cutting and blocking structure and can be in good contact with the ground, increasing the contact area between the sampling device and the ground, making the device more stable during the sampling process, reducing the impact on sampling caused by uneven ground or device shaking, and being conducive to ensuring the quality and accuracy of sampling. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Figure 1 is an isometric schematic view of the overall structure of the present invention;
[0022] Figure 2 is a side view schematic of the present invention;
[0023] Figure 3 is a schematic view of the fixing structure of the present invention;
[0024] Figure 4 is a sectional view schematic of the present invention;
[0025] Figure 5 is a schematic view of the rotating structure of the present invention;
[0026] Figure 6 is a schematic view of the cutting and blocking structure of the present invention.
[0027] In the figure: 1, support frame; 11, limit hole; 12, downward pressing handle; 2, fixing structure; 21, fixing cylinder; 22, fixing block; 23, guide rod; 24, threaded rod; 25, limit block; 26, semi-circular rack; 27, gear; 28, connecting sleeve; 3, lifting cylinder; 4, fixing ring; 5, rotating structure; 51, rotating ring; 52, connecting ring; 53, connecting plate; 54, blocking strip; 55, lead screw; 56, rotating handle; 57, downward pressing rod; 58, ring cutter; 59, lower pressing plate; 6, cutting and blocking structure; 61, connecting block; 62, sliding hole; 63, fixing rod; 64, cutting knife; 65, sliding groove; 66, through hole. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0028] In order to make the objectives, technical solutions and advantages of the present invention more clear and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.
[0029] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.
[0030] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, "a plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.
[0031] In the present invention, unless otherwise clearly defined and limited, the terms "mounted", "connected", "coupled", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral body; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0032] In the present invention, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.
[0033] In the description of this specification, the description referring to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.
[0034] As Figures 1-6 shown, the present invention provides a technical solution: an undisturbed soil sample sampling device for engineering geological exploration, including a support frame 1 and a lifting cylinder 3, the bottom end of which is a conical structure. A chute is provided on the outer wall of one side of the support frame 1, and limiting holes 11 are equidistantly provided on the outer side of the front. A fixing block 22 is slidably arranged in the chute. The fixing block 22 is a convex-shaped structure, and the fixing block 22 is divided into a first end face and a second end face. A fixing hole coaxial with the limiting hole 11 is provided on the first end face;
[0035] A fixing structure 2, arranged at the bottom end of the support frame 1, for fixing and lifting the lifting cylinder 3;
[0036] A rotating structure 5, arranged on the outer wall of the fixing structure 2, for rotating the cutting and blocking structure 6;
[0037] A cutting and blocking structure 6, arranged at the bottom end of the fixing structure 2, for cutting off the excess sand during sampling and maintaining the original state;
[0038] A fixing ring 4, arranged below the cutting and blocking structure 6, for supporting with the ground and increasing the contact surface.
[0039] As Figure 3As shown in the figure, the fixing structure 2 includes a fixing cylinder 21. The outer wall of the fixing cylinder 21 is connected to the fixing block 22. One side of the bottom end of the top of the support frame 1 is provided with a guide rod 23, and the other side is provided with a threaded rod 24. Connecting sleeves 28 are arranged on the outer walls of both the threaded rod 24 and the guide rod 23, and limit blocks 25 are installed at the ends of the threaded rod 24 and the guide rod 23. Specifically, a motor is provided at the top end of the support frame 1. The output end of the motor is fixedly connected to a rotating shaft. The end of the rotating shaft penetrates through the bottom end of the support frame 1 and is connected to a gear 27. Pressing handles 12 are arranged on the outer walls of both sides of the support frame 1 near the top end. Generally speaking, the fixing cylinder 21 and the fixing block 22 are fixedly connected. Thus, when the fixing cylinder 21 drives the threaded rod 24 to rotate through the motor, the threaded rod 24 will drive the connecting sleeve 28 to move downward, and the connecting sleeve 28 is connected to the lifting cylinder 3. Therefore, the lifting cylinder 3 can be driven to move downward at the same time. By the downward movement of the fixing cylinder 21 and the lifting cylinder 3, it can be ensured that when sampling, the surrounding sand and soil are blocked from scattering and being disturbed.
[0040] As Figures 2 to 5 shown, the rotating structure 5 includes a semi-circular rotating ring 51 and a connecting ring 52. The connecting rings 52 are evenly distributed at the top and bottom ends of the fixing cylinder 21. A connecting plate 53 is arranged on the inner walls of the centers of the rotating ring 51 and the connecting ring 52. A semi-circular rack 26 is installed on the outer wall of one side of the connecting plate 53. The semi-circular rack 26 is meshed and connected with the gear 27. A stop bar 54 is installed at the end of the connecting plate 53.
[0041] A lead screw 55 is arranged at the center of the top end of the support frame 1. A concave block is installed at the end of the lead screw 55. A core cutter 58 is arranged on the outer wall of the concave block. A lower pressing plate 59 is arranged at the bottom end of the concave block. The center of the top end of the lower pressing plate 59 is provided with a lower pressing rod 57. The lower pressing rod 57 is located in the inner wall of the center of the lead screw 55 and is connected to a rotating rod at the bottom end. A rotating handle 56 is arranged on the outer wall of the top end of the lead screw 55. Specifically, the semi-circular rotating ring 51 is connected to one side of the top end of the support frame 1. Figure 5 As shown in the figure, the support frame 1 is of a T-shaped structure. The power source of the rotating structure 5 is a motor. The motor is electrically connected to an external power supply. The connecting plate 53 is fixedly installed on the inner walls of the centers of the semi-circular rotating ring 51 and the connecting ring 52. A semi-circular rack 26 is installed on the outer wall of one side of the connecting plate 53. When the motor drives the gear 27 installed on the outer wall of the rotating shaft to rotate, the gear 27 can drive the semi-circular rack 26 to rotate. The semi-circular rack 26 is fixedly connected to the connecting plate 53. Therefore, when the gear 27 drives the semi-circular rack 26 to rotate, it will drive the connecting plate 53 to rotate. The end of the connecting plate 53 is connected to the cutting and blocking structure 6.
[0042] The cutting and blocking structure 6 includes a connecting block 61. The connecting block 61 is located below the fixed cylinder 21, and the connecting block 61 is connected to the blocking strip 54. A through hole 66 is provided at the center of the top end of the connecting block 61, and sliding holes 62 are equidistantly distributed at the top end of the connecting block 61.
[0043] The connecting block 61 is a hollow structure, and a sliding groove 65 is provided on the inner wall of the bottom end of the connecting block 61. The sliding groove 65 is a hexagonal structure. Fixed rods 63 are provided in both the sliding groove 65 and the through hole 66, and a cutting knife 64 is provided between the fixed rods 63. Specifically, the end of the connecting plate 53 is connected to the blocking strip 54. When the connecting plate 53 drives the blocking strip 54 to rotate, the connecting block 61 can be driven to rotate. As Figure 6 shown, the connecting block 61 is a hollow structure, and a sliding groove 65 is provided on the inner wall of the bottom end of the connecting block 61. The sliding groove 65 is a hexagonal structure. Sliding holes 62 are equidistantly distributed at the top of the connecting block 61. Fixed rods 63 are movably arranged in the sliding holes 62 and the sliding groove 65, and a cutting knife 64 is fixedly connected between the fixed rods 63. When the connecting block 61 rotates, the excess sand can be cut by the cutting knife 64, which can ensure the integrity of the sand sample in the ring cutter 58.
[0044] The working principle of the present invention is as follows. First, it is fixed to the ground of the area to be sampled through the support frame 1. Since the bottom end of the support frame 1 is conical, it can be directly inserted into the ground, which can increase the support stability of the support frame 1. After the support frame 1 is inserted into the ground, the set pressing handle 12 can assist in inserting the support frame 1 into the ground. Then, the motor drives the lead screw 55 to rotate, and the rotating lead screw 55 will drive the connecting sleeve 28 to move downward. The connecting sleeve 28 is fixedly connected to the lifting cylinder 3, so that the lifting cylinder 3 can be driven to move downward. The fixed cylinder 21 can be adjusted according to the descending distance of the lifting cylinder 3. A limiting hole 11 is provided on the support frame 1, and a fixing hole coaxial with the limiting hole 11 is provided on the fixing block 22. The fixing hole and the limiting hole 11 are fixed by an external positioning pin to fix the fixing block 22 and the limiting hole 11. Since the fixed cylinder 21 is fixedly connected to the fixing block 22, the fixed cylinder 21 can be fixed by the positioning pin. By Figure 4It can be seen that teeth are also provided in the contact area between the bottom end of the fixed ring 4 and the ground. The teeth can increase the contact force with the ground. Then, the handle 56 is rotated to drive the screw rod 55 to rotate. At the end of the screw rod 55, a ring cutter 58 is fixedly installed through a concave block. The ring cutter 58 is connected to the concave block by bolts, which facilitates the replacement of the ring cutter 58. The rotating screw rod 55 will drive the ring cutter 58 to rotate. The rotating ring cutter 58 can take samples of the sandy soil. After sampling, the screw rod 55 is reversed to drive the ring cutter 58 to move upward. There is excess sandy soil at the end of the rising ring cutter 58. The motor drives the gear 27 fixedly installed on the rotating shaft to rotate, and the gear 27 is meshed with the semi-circular rack 26 fixedly connected to the connecting plate 53. Therefore, the gear 27 can drive the semi-circular rack 26 to rotate. The connecting plate 53 is movably arranged on the inner walls of the connecting ring 52 and the center of the connecting ring 52. The end of the connecting plate 53 is connected to the connecting block 61. A groove that can rotate with the connecting block 61 is opened on the inner wall of the fixed cylinder 21. The groove can not only install the connecting block 61 but also rotate with the connecting block 61. When the connecting block 61 rotates, the fixed rod 63 installed in the sliding groove 65 at the bottom inner wall and the sliding hole 62 at the top of the connecting block 61 will move along the paths of the sliding hole 62 and the sliding groove 65. A cutting knife 64 is fixedly connected between the fixed rods 63. The cutting knife 64 will also open and close along the paths of the sliding hole 62 and the sliding groove 65, so as to cut off the excess sandy soil outside the ring cutter 58. After cutting, the cutting knife 64 is in a closed state, and the ring cutter 58 is placed at the top of the cutting knife 64 to ensure the original state of the sandy soil. Then, the pressing rod 57 inside the inner wall of the screw rod 55 is pressed, and the pressing rod 57 drives the lower pressing plate 59 in the ring cutter 58 to move downward, so that the sandy soil in the ring cutter 58 can be taken out of the ring cutter 58 while ensuring the original state of the sample.
[0045] In summary, the undisturbed soil sample sampling device for engineering geological exploration includes a support frame 1 and a lifting cylinder 3. The bottom end of the lifting cylinder 3 is of a conical structure. A chute is provided on the outer wall of one side of the support frame 1, and limiting holes 11 are equidistantly provided on the outer side of the front. A fixing block 22 is slidably arranged in the chute. The fixing block 22 is of a convex structure and is divided into a first end face and a second end face. A fixing hole coaxial with the limiting hole 11 is provided on the first end face. A fixing structure 2 is arranged at the bottom end of the support frame 1 for fixing and lifting the lifting cylinder 3. A rotating structure 5 is arranged on the outer wall of the fixing structure 2 for rotating a cutting and blocking structure 6. The cutting and blocking structure 6 is arranged at the bottom end of the fixing structure 2 for cutting off the redundant sand during sampling and keeping the original state. A fixing ring 4 is arranged below the cutting and blocking structure 6 for supporting with the ground and increasing the contact surface. Through the connection between the fixing cylinder 21 in the fixing structure 2 and the support frame 1 by the fixing block 22, and the fixing block 22 can slide in the chute of the support frame 1 and is fixed through the fixing hole cooperating with the limiting hole 11, it is convenient to adjust the height of the sampling device. At the same time, the connecting sleeves 28 on the threaded rod 24 and the guide rod 23 can assist in fixing and realizing the lifting function, so that the sampling device can adapt to different sampling depth requirements and is flexible and convenient to operate.
[0046] At the same time, the semi-circular rotating ring 51 and the connecting ring 52 in the rotating structure 5 are connected by a connecting plate 53. The semi-circular rack 26 on the connecting plate 53 cooperates with the gear 27, which can realize the precise rotation of the rotating structure 5. When the rotating structure 5 rotates, it drives the connecting block 61 and the cutting and blocking structure 6 to rotate. The cutting knife 64 can cut off the redundant sand during sampling, effectively avoiding the scattering and interference of the sand during the sampling process, ensuring the integrity and original state of the sampled soil sample. At the same time, structures such as the connecting block 61 can also play a certain blocking role to prevent the surrounding sand from mixing in during the sampling process, further improving the quality of the soil sample.
[0047] Secondly, the fixing ring 4 is arranged below the cutting and blocking structure 6, which can be in good contact with the ground, increasing the contact area between the sampling device and the ground, making the device more stable during the sampling process, reducing the influence on sampling caused by uneven ground or device shaking, and being beneficial to ensuring the quality and accuracy of sampling.
[0048] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirits of the present invention. The scope of the present invention is defined by the appended embodiments and their equivalents.
Claims
1. An in-situ sampling device for sandy soil in engineering geological exploration, characterized in that, It includes a support frame (1) and a lifting cylinder (3), the bottom end of which is a conical structure. A chute is provided on the outer wall of one side of the support frame (1), and limiting holes (11) are equidistantly provided on the outer side of the front. A fixing block (22) is slidably arranged in the chute. The fixing block (22) is of a convex shape and is divided into a first end face and a second end face. A fixing hole coaxial with the limiting hole (11) is provided on the first end face. A fixing structure (2) is arranged at the bottom end of the support frame (1) for fixing and lifting the lifting cylinder (3). A rotating structure (5) is arranged on the outer wall of the fixing structure (2) for rotating the cutting and blocking structure (6). A cutting and blocking structure (6) is arranged at the bottom end of the fixing structure (2) for cutting off the excess sand and soil during sampling and keeping it intact. A fixing ring (4) is arranged below the cutting and blocking structure (6) for supporting with the ground and increasing the contact surface.
2. The sampling device for undisturbed sand samples in engineering geological exploration according to claim 1, characterized in that, The fixing structure (2) includes a fixing cylinder (21). The outer wall of the fixing cylinder (21) is connected to the fixing block (22). A guiding rod (23) is arranged on one side of the bottom end of the top of the support frame (1), and a threaded rod (24) is arranged on the other side. Connecting sleeves (28) are arranged on the outer walls of both the threaded rod (24) and the guiding rod (23), and limiting blocks (25) are installed at the ends of the threaded rod (24) and the guiding rod (23).
3. The sampling device for undisturbed sand samples in engineering geological exploration according to claim 1, characterized in that, A motor is arranged at the top end of the support frame (1). The output end of the motor is fixedly connected with a rotating shaft. The end of the rotating shaft penetrates through the bottom end of the support frame (1) and is connected with a gear (27). Pressing handles (12) are arranged on the outer walls of both sides near the top end of the support frame (1).
4. An in-situ sample sampling device for sandy soil in engineering geological exploration according to claim 1, characterized in that, The rotating structure (5) includes a semi-circular rotating ring (51) and a connecting ring (52). The connecting rings (52) are equidistantly distributed at the top and bottom ends of the fixing cylinder (21). A connecting plate (53) is arranged on the inner walls at the centers of the rotating ring (51) and the connecting ring (52). A semi-circular rack (26) is installed on the outer wall of one side of the connecting plate (53). The semi-circular rack (26) is meshed and connected with the gear (27). A blocking bar (54) is installed at the end of the connecting plate (53).
5. The sampling device for undisturbed samples of sandy soil in engineering geological exploration according to claim 1, characterized in that, A lead screw (55) is arranged at the center of the top end of the support frame (1). A concave block is installed at the end of the lead screw (55). A ring cutter (58) is arranged on the outer wall of the concave block. A lower pressing plate (59) is arranged at the bottom end of the concave block. A pressing rod (57) is arranged at the center of the top end of the lower pressing plate (59). The pressing rod (57) is located in the inner wall at the center of the lead screw (55), and a rotating rod is connected to the bottom end. A rotating handle (56) is arranged on the outer wall at the top end of the lead screw (55).
6. The sampling device for undisturbed samples of sandy soil in engineering geological exploration according to claim 1, characterized in that, The cutting and blocking structure (6) includes a connecting block (61). The connecting block (61) is located below the fixing cylinder (21), and the connecting block (61) is connected to the blocking bar (54). A through hole (66) is opened at the center position of the top end of the connecting block (61), and sliding holes (62) are equidistantly distributed at the top end of the connecting block (61).
7. An undisturbed sample sampling device for engineering geological exploration of sandy soil according to claim 6, characterized in that, The connecting block (61) has a hollow structure, and a sliding groove (65) is formed in the inner wall of the bottom end of the connecting block (61). The sliding groove (65) has a hexagonal structure. Fixing rods (63) are arranged in both the sliding groove (65) and the through hole (66), and a cutting knife (64) is arranged between the fixing rods (63).