Portable sampling device for geotechnical engineering investigation

Abstract

The invention discloses a portable sampling device for geotechnical engineering investigation, and relates to the technical field of sampling devices. According to the portable sampling device for geotechnical engineering investigation, through the arrangement of the sampling drill rod, after the sampling drill rod reaches a sampling position, the sampling drill rod runs clockwise, so that an arc-shaped baffle plate is opened, a sample enters the sampling drill rod through a feeding channel, and the sample is conveyed and stored through a running sampling column; compared with a traditional sampling mode, the device is more convenient and faster, meanwhile, through cooperation of components such as a transmission disc, the sampling drill rod can be conveniently disassembled and assembled, and the use convenience of the device is improved while the device is convenient to carry.

Description

Technical Field

[0001] The invention relates to the technical field of sampling devices, in particular to a portable sampling device for geotechnical engineering investigation. Background Art

[0002] Geotechnical engineering is a discipline that studies the engineering properties of underground rocks and soils, mainly including foundation engineering, foundation engineering, slope engineering, retaining wall engineering, underground engineering and other fields. The main task of geotechnical engineering is to study the mechanical properties, hydrogeological conditions and engineering geological characteristics of underground rock and soil in order to provide a scientific basis for engineering design and construction. During the survey, most of the rock and soil are sampled by sampling devices. Referring to the Chinese patent, the announcement number is "CN221898828U" "A portable sampling device for geotechnical engineering survey", which points out that the existing sampling device has the problem of poor stability during sampling; but the device still has the problem of poor sampling convenience and low sampling efficiency. In this regard, we propose a portable sampling device for geotechnical engineering survey to solve the above problems. Summary of the invention

[0003] In view of the deficiencies in the prior art, the present invention provides a portable sampling device for geotechnical engineering investigation, which solves the problems raised in the above-mentioned background technology.

[0004] To achieve the above purpose, the present invention is implemented through the following technical solutions: a portable sampling device for geotechnical engineering survey, including a limit frame, a transmission disk is slidably connected to the limit frame, a sampling drill rod is rotatably connected to the transmission disk, a drill bit is fixed to the end of the sampling drill rod, a driving component is provided inside the transmission disk for running the sampling drill rod, and a hydraulic cylinder is fixed on the top of the limit frame for driving the running sampling drill rod to move downward to realize the sampling operation; A plurality of feed channels and arc-shaped notches are symmetrically provided inside the sampling drill rod, and an arc-shaped baffle is rotatably connected to the end of the feed channel for blocking the feed channel, and a magnetic suction piece is fixedly installed on the inner wall of the feed channel for limiting the arc-shaped baffle, and a transmission baffle is slidably installed inside the arc-shaped notch, and a transmission push rod is rotatably installed inside the sampling drill rod, one end of the transmission push rod is connected to the magnetic suction piece and slidably connected thereto, and a pressing plate adapted to the transmission push rod is fixedly installed on the inner side of the transmission baffle, and the transmission baffle can be retracted into the arc-shaped notch when the sampling drill rod rotates clockwise, and the transmission push rod is pushed to run through the pressing plate to push out the arc-shaped baffle, so that the feed channel is opened; A sampling column is rotatably connected inside the sampling drill rod, and a loading sleeve is sleeved on the outside of the sampling column. The loading sleeve is slidingly connected to the sampling drill rod, and a threaded loading piece is fixed on the outside of the sampling column to transport the sample upward through the loading sleeve. Multiple storage ring sleeves are sleeved on the outside of the loading sleeve to store the samples.

[0005] Preferably, sealing parts are provided between the multiple storage ring sleeves and the feeding sleeves for classified storage of samples of different depths, the sealing parts include sealing sheets, and multiple rectangular feed ports are symmetrically opened on both sides of the inner part of the storage ring sleeve and the feeding sleeve, the sealing sheets are slidably connected to the outer sides of the rectangular feed ports for sealing the rectangular feed ports, and a loading sheet is slidably installed inside the storage ring sleeve, and multiple spring bodies are fixed between the bottom of the loading sheet and the storage ring sleeve, and an elastic pull rope is connected between the top surface of the loading sheet and the corresponding sealing sheet, which is used to drive the sealing sheet to move upward to seal the rectangular feed port when the sealing sheet is forced to move downward.

[0006] Preferably, the end of the arc-shaped baffle is rotatably connected to a rotating shaft, and the rotating shaft is rotatably installed inside the corresponding feed channel. A plurality of supporting springs are fixed between the transmission baffle and the inner wall of the arc-shaped groove, and a return spring is fixedly installed between one end of the transmission top rod away from the arc-shaped baffle and the inner wall of the arc-shaped groove.

[0007] Preferably, a bottom loading ring is fixedly installed inside the sampling drill rod, the top surface of the bottom loading ring is kept flush with the feed channel, and a recovery slot is opened inside the bottom loading ring.

[0008] Preferably, a plug-in block is inserted into the end of the sampling drill rod, which is used to drive the sampling column to rotate inside the sampling drill rod, the end of the sampling column passes through the plug-in block and is rotatably connected thereto, a servo motor is fixedly installed inside the plug-in block, a transmission belt is rotatably connected between the output end of the servo motor and the end of the sampling column, a power supply module is fixedly installed inside the plug-in block, and a lifting frame is fixedly installed on the top surface of the plug-in block.

[0009] Preferably, the driving assembly includes a driving gear, a driving motor is installed inside the transmission disk, and the driving gear is fixedly sleeved on the output end of the driving motor, and the end of the sampling drill rod is fixedly sleeved with a transmission gear, and the transmission gear and the driving gear are meshed with each other.

[0010] Preferably, a slot is provided inside the transmission disc, a bearing is sleeved on the end of the sampling drill rod, the bearing is rotatably connected inside the slot, and positioning screws are rotatably connected on both sides of the slot, and the positioning screws are used to lock the installation position of the bearing.

[0011] Preferably, a pressure plate is fixedly mounted on the top surface of the transmission disc, the piston end of the hydraulic cylinder is coaxial with the pressure plate, sliding grooves are provided on both sides of the interior of the limit frame, the transmission disc is slidably connected to the sliding grooves, and a counterweight frame is provided at the end of the limit frame.

[0012] Preferably, a cleaning frame is slidably connected to the interior of the limiting frame up and down, and a through hole is opened in the interior of the cleaning frame for allowing the sampling drill rod to pass through.

[0013] Preferably, a plurality of cleaning brushes are fixedly mounted on the bottom of the cleaning rack for cleaning the surface of the sampling drill rod.

[0014] The present invention provides a portable sampling device for geotechnical engineering investigation. Compared with the prior art, it has the following beneficial effects: (1) The portable sampling device for geotechnical engineering investigation, through the setting of the sampling drill rod, can, when the sampling drill rod reaches the sampling position, run the sampling drill rod clockwise to open the arc-shaped baffle, and the sample enters the sampling drill rod through the feed channel, and the sample is transported and stored through the running sampling column. Compared with the traditional sampling method, it is more convenient. At the same time, through the cooperation of components such as the transmission plate, the sampling drill rod can be easily disassembled and assembled, which is convenient for carrying and improves the convenience of use of the equipment.

[0015] (2) The portable sampling device for geotechnical engineering investigation, through the cooperation of the feeding sleeve and the storage ring, can drive the threaded feeding piece to run through the sampling column during the sampling process, and transport samples of different depths from low to high to the inside of the storage ring in sequence. It can perform multiple samplings while avoiding the mixing of samples of different depths, thereby improving work efficiency and convenience of operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the cross-sectional structure of the limiting frame of the present invention; Figure 3 For the present invention Figure 2 The enlarged structural diagram at A in the middle; Figure 4 For the present invention Figure 2 Side view; Figure 5 This is a schematic diagram of the cross-sectional structure of the sampling drill rod of the present invention; Figure 6 For the present invention Figure 5 The enlarged structural diagram at B in the middle; Figure 7 For the present invention Figure 5 The enlarged structural diagram at C in the middle; Figure 8 This is a schematic diagram of the cross-sectional structure of the sampling drill rod of the present invention; Fig. 9 For the present invention Figure 8 The enlarged structural diagram at D in the middle; Fig.10 This is a schematic diagram of the cross-sectional structure of the feeding sleeve and the storage ring sleeve of the present invention; Fig.11 For the present invention Fig.10 The enlarged structural diagram at E in the middle; Fig.12 It is a schematic diagram of the feeding sleeve structure of the present invention.

[0017] In the figure: 1, limit frame; 101, slide; 102, cleaning frame; 103, cleaning brush; 2, counterweight frame; 3, hydraulic cylinder; 4, transmission plate; 401, notch; 402, positioning screw; 5, pressure plate; 6, sampling drill rod; 601, drill bit; 602, bearing; 7, transmission gear; 701, driving gear; 8, plug-in block; 801, power supply module; 802, servo motor; 803, transmission belt; 804, lifting frame; 9, sampling column; 901, threaded loading sheet; 10 , feeding sleeve; 1001, rectangular feeding port; 11, storage ring sleeve; 1101, loading sheet; 1102, spring body; 1103, blocking sheet; 1104, elastic pull rope; 12, feeding channel; 13, arc-shaped baffle; 1301, rotating shaft; 1302, magnetic sheet; 14, arc-shaped slot; 15, transmission baffle; 1501, supporting spring; 1502, pressure plate; 16, transmission push rod; 1601, reset spring; 17, bottom feeding ring; 1701, recovery slot. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] See also Figure 1-Figure 12 The present invention provides two technical solutions, which specifically include the following embodiments: Embodiment 1: In the embodiment of the present invention, a portable sampling device for geotechnical engineering survey includes a limit frame 1, a transmission disk 4 is connected to the limit frame 1 for sliding up and down, a sampling drill rod 6 is connected to the transmission disk 4 for rotation, a drill bit 601 is fixed to the end of the sampling drill rod 6, a driving assembly is provided inside the transmission disk 4 for running the sampling drill rod 6, a hydraulic cylinder 3 is fixed on the top of the limit frame 1 for driving the running sampling drill rod 6 to move downward to realize the sampling operation, a counterweight frame 2 is provided at the end of the limit frame 1, and the counterweight frame 3 is placed at the position to be sampled when in use, the limit frame 1 and the counterweight frame 2 are plug-in type, which is easy to disassemble, and after the limit frame 1 and the counterweight frame 2 are assembled, the transmission disk 4 and the sampling drill rod 6 can be driven downward by the hydraulic rod 3, and the sampling drill rod 6 is driven to rotate inside the transmission disk 4 by the driving assembly, so that the sampling drill rod 6 drills into the position to be sampled to perform the sampling operation; In the embodiment of the present invention, further, a plurality of feed channels 12 and arc-shaped slots 14 are symmetrically provided inside the sampling drill rod 6, and an arc-shaped baffle 13 is rotatably connected to the end of the feed channel 12 for blocking the feed channel 12, and a magnetic suction sheet 1302 is fixedly installed on the inner wall of the feed channel 12 for limiting the arc-shaped baffle 13, and a transmission baffle 15 is slidably installed inside the arc-shaped slot 14, and a transmission push rod 16 is rotatably installed inside the sampling drill rod 6, one end of the transmission push rod 16 is connected to the magnetic suction sheet 1302 and slidably connected thereto, and a pressing plate 1502 that is adapted to the transmission push rod 16 is fixedly installed on the inner side of the transmission baffle 15, and the transmission baffle 15 can be retracted into the arc-shaped slot 14 when the sampling drill rod 6 rotates clockwise, and the transmission push rod 16 is pushed to run through the pressing plate 1502, so as to push out the arc-shaped baffle 13 and open the feed channel 12; In the embodiment of the present invention, specifically, refer to Figure 1-Figure 12 , the sampling drill rod 6 is provided with a plurality of planes on the outside, and the arc-shaped notches 14 are all provided on the planes of the sampling drill rod 6. When the sampling drill rod 6 rotates counterclockwise, the normal sampling operation can be completed. When the sampling drill rod 6 rotates clockwise, the contact force between the transmission baffle 15 and the soil will increase, so that the transmission baffle 15 can be retracted into the arc-shaped notch 14 by force, and the transmission push rod 16 is squeezed by the pressure plate 1502, so that the transmission push rod 16 can rotate inside the sampling drill rod 6, and the arc-shaped baffle 13 is pushed out. When the arc-shaped baffle 15 is rotated, the arc-shaped baffle 13 is pushed out. When 13 is ejected, the sampling drill rod 6 can rotate clockwise to collect the sample, so that the sample can enter the sampling drill rod 6 through the feeding channel 12. After the sampling is completed, the sampling drill rod 6 rotates counterclockwise, which can automatically reset the arc-shaped baffle 13 to block the feeding channel 12, and the transmission baffle 15 can be reset by the support spring 1501. In this way, the convenience of sampling can be effectively improved, and sampling can be carried out according to the sampling depth, ensuring the sampling accuracy. In the embodiment of the present invention, further, a sampling column 9 is rotatably connected inside the sampling drill rod 6, and a feeding sleeve 10 is sleeved on the outside of the sampling column 9. The feeding sleeve 10 is slidably connected to the sampling drill rod 6. A threaded feeding piece 901 is fixed on the outside of the sampling column 9 for conveying the sample upward through the feeding sleeve 10. A plurality of storage rings 11 are sleeved on the outside of the feeding sleeve 10 for storing the sample. When the sample enters the sampling drill rod 6, the sampling column 9 can rotate to drive the threaded feeding piece 901 to run, so that the sample can be conveyed upward through the cooperation of the threaded feeding piece 901 and the feeding sleeve 10 until it enters the corresponding storage ring 11, and the automatic sampling operation can be completed. In the embodiment of the present invention, specifically, a sealing member is provided between the plurality of storage ring sleeves 11 and the feeding sleeve 10, which is used for classifying and storing samples of different depths, the sealing member includes a sealing piece 1103, and a plurality of rectangular feed ports 1001 are symmetrically provided on both sides of the storage ring sleeve 11 and the feeding sleeve 10, the sealing piece 1103 is slidably connected to the outer side of the rectangular feed port 1001, and is used for blocking the rectangular feed port 1001, a material carrier 1101 is slidably installed inside the storage ring sleeve 11, a plurality of spring bodies 1102 are fixed between the bottom of the material carrier 1101 and the storage ring sleeve 11, an elastic pull rope 1104 is connected between the top surface of the material carrier 1101 and the corresponding sealing piece 1103, and is used for driving the sealing piece 1103 to move upward to block the rectangular feed port 1001 when the sealing piece 1103 is forced to move downward; In the embodiment of the present invention, reference Figure 10-12 , at this time, the blocking piece 1103 is in the open state. When the sample enters the storage ring sleeve 11 through the rectangular feed port 1001, it can fall on the carrier sheet 1101. When the sample stores a certain weight, the carrier sheet 1101 is forced to move downward, squeezing the spring body 1102. As the carrier sheet 1101 moves downward, the blocking piece 1103 can be pulled upward to block the rectangular feed port 1001. Therefore, the storage of the sample can be completed, so that in the sampling process, as the sampling drill rod 6 continuously moves downward for sampling, the sample can be stored in the storage ring sleeve 11 from bottom to top at a time, that is, the deepest sample can be stored in the storage ring sleeve 11 at the highest point. On the one hand, it ensures that samples of different depths will not be mixed. Secondly, it is convenient to perform multiple sampling operations, which improves the convenience of operation. A spring is installed at the end of the blocking piece 1103 to drive the blocking piece 1103 to reset; In the embodiment of the present invention, the end of the arc-shaped baffle 13 is rotatably connected with a rotating shaft 1301, and the rotating shaft 1301 is rotatably installed inside the corresponding feed channel 12. A plurality of supporting springs 1501 are fixed between the transmission baffle 15 and the inner wall of the arc-shaped notch 14, and a reset spring 1601 is fixedly installed between the end of the transmission top rod 16 away from the arc-shaped baffle 13 and the inner wall of the arc-shaped notch 14. The supporting spring 1501 is used to drive the transmission baffle 15 to reset, and the reset spring 1601 is used to drive the transmission top rod 16 to reset; In the embodiment of the present invention, a bottom loading ring 17 is fixedly installed inside the sampling drill rod 6, the top surface of the bottom loading ring 17 is kept flush with the feed channel 12, and a recovery slot 1701 is opened inside the bottom loading ring 17. Through the arrangement of the bottom loading ring 17, when the sample enters the sampling drill rod 6 through the feed channel 12, it can fall on the bottom loading ring 17. The diameter of the recovery slot 17 is smaller than the diameter of the feeding sleeve 10, so that the excess sample can be recycled through the recovery slot 17 to avoid mixing of samples at different depths due to sample residue; In the embodiment of the present invention, further, a plug-in block 8 is inserted into the end of the sampling drill rod 6, which is used to drive the sampling column 9 to rotate inside the sampling drill rod 6. The end of the sampling column 9 passes through the plug-in block 8 and is rotatably connected thereto. A servo motor 802 is fixedly installed inside the plug-in block 8. A transmission belt 803 is rotatably connected between the output end of the servo motor 802 and the end of the sampling column 9. A power supply module 801 is fixedly installed inside the plug-in block 8. A lifting frame 804 is fixedly installed on the top surface of the plug-in block 8. The plug-in block 8 is columnar and is used to facilitate the sampling column 9 and the upper The material sleeve 10 and the storage ring sleeve 11 are disassembled by lifting the plug block 8 through the lifting frame 804. During assembly, since the plug block 8 is rotatably connected to the sampling column 9, and the sampling column 9 is rotatably connected to the material sleeve 10, when sampling, it is only necessary to sleeve the storage ring sleeve 11 on the outside of the material sleeve 10, and then insert it into the sampling drill rod 6. The inner wall of the sampling drill rod 6 is provided with supporting convex points for supporting the storage ring sleeve 11 at the bottom, and then the assembly is completed, which effectively improves the convenience of disassembly and assembly of the equipment and is convenient for carrying; In the embodiment of the present invention, specifically, the driving assembly includes a driving gear 701, a driving motor is installed inside the transmission disk 4, and the driving gear 701 is fixedly sleeved on the output end of the driving motor, and the end of the sampling drill rod 6 is fixedly sleeved with a transmission gear 7, and the transmission gear 7 and the driving gear 701 are meshed with each other. The driving motor is an existing forward and reverse motor, which is used to drive the sampling drill rod 6 to rotate forward and reverse through the cooperation of the driving gear 701 and the transmission gear 7 to realize the sampling operation; In the embodiment of the present invention, specifically, a notch 401 is provided inside the transmission disc 4, a bearing 602 is sleeved at the end of the sampling drill rod 6, the bearing 602 is rotatably connected inside the notch 401, and both sides of the inside of the notch 401 are rotatably connected with positioning screws 402, and the positioning screws 402 are used to lock the installation position of the bearing 602. When disassembling, it is only necessary to twist the positioning screws 402 to cancel the limit on the bearing 602, and the sampling drill rod 6 and Zhou Heng 602 can be taken out, thereby improving the convenience of disassembly and maintenance of the equipment; In the embodiment of the present invention, specifically, a pressure plate 5 is fixedly installed on the top surface of the transmission plate 4, the piston end of the hydraulic cylinder 3 remains coaxial with the pressure plate 5, and sliding grooves 101 are opened on both sides of the interior of the limit frame 1, and the transmission plate 4 is slidably connected to the sliding grooves 101.

[0020] Embodiment 2: Based on embodiment 1, specifically, a cleaning frame 102 is slidably connected to the interior of the limiting frame 1, and a through hole is provided inside the cleaning frame 102 for passing the sampling drill rod 6; In the embodiment of the present invention, a plurality of cleaning brushes 103 are fixedly installed at the bottom of the cleaning frame 102 for cleaning the surface of the sampling drill rod 6; In the embodiment of the present invention, when the sampling drill rod 6 moves upward after sampling, it can pass through multiple cleaning brushes 103. At this time, the sampling drill rod 6 rotates, and the multiple cleaning brushes 103 can complete the cleaning operation on the surface of the sampling drill rod 6.

[0021] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0022] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the present invention.

Claims

1. A portable sampling device for geotechnical engineering investigation, comprising a limit frame (1), characterized in that: A transmission disc (4) is slidably connected to the limiting frame (1) in an upward and downward manner, a sampling drill rod (6) is rotatably connected to the transmission disc (4), a drill bit (601) is fixed to the end of the sampling drill rod (6), a driving component is provided inside the transmission disc (4) for driving the sampling drill rod (6) to move, and a hydraulic cylinder (3) is fixed on the top of the limiting frame (1) for driving the running sampling drill rod (6) to move downward to realize sampling operation; The sampling drill rod (6) is symmetrically provided with a plurality of feed channels (12) and arc-shaped slots (14) inside. The ends of the feed channels (12) are rotatably connected with arc-shaped baffles (13) for blocking the feed channels (12). A magnetic suction sheet (1302) is fixedly installed on the inner wall of the feed channel (12) for limiting the position of the arc-shaped baffles (13). A transmission baffle (15) is slidably installed inside the arc-shaped slots (14). A transmission top is rotatably installed inside the sampling drill rod (6). Rod (16), one end of the transmission push rod (16) is connected to the magnetic sheet (1302) and is slidably connected thereto, a pressing plate (1502) adapted to the transmission push rod (16) is fixedly installed on the inner side of the transmission baffle (15), and the transmission baffle (15) can be retracted into the arc-shaped notch (14) when the sampling drill rod (6) rotates clockwise, and the transmission push rod (16) is pushed to run through the pressing plate (1502), so as to push out the arc-shaped baffle (13) and open the feed channel (12); A sampling column (9) is rotatably connected inside the sampling drill rod (6), and a feeding sleeve (10) is sleeved on the outside of the sampling column (9). The feeding sleeve (10) is slidably connected to the sampling drill rod (6). A threaded feeding piece (901) is fixed on the outside of the sampling column (9) for conveying the sample upward through the feeding sleeve (10). A plurality of storage ring sleeves (11) are sleeved on the outside of the feeding sleeve (10) for storing the sample.

2. A portable sampling device for geotechnical engineering investigation according to claim 1, characterized in that: A sealing member is provided between the plurality of storage rings (11) and the feeding sleeve (10) for classifying and storing samples of different depths. The sealing member comprises a sealing piece (1103). A plurality of rectangular feed ports (1001) are symmetrically provided on both sides of the storage rings (11) and the feeding sleeve (10). The sealing piece (1103) is slidably connected to the outside of the rectangular feed port (1001) for sealing the rectangular feed port (1001). A material carrier (1101) is slidably mounted inside the storage ring sleeve (11), a plurality of spring bodies (1102) are fixed between the bottom of the material carrier (1101) and the storage ring sleeve (11), and an elastic pull rope (1104) is connected between the top surface of the material carrier (1101) and the corresponding blocking piece (1103), so as to drive the blocking piece (1103) to move upward to block the rectangular feed opening (1001) when the blocking piece (1103) is forced to move downward.

3. A portable sampling device for geotechnical engineering investigation according to claim 1, characterized in that: The end of the arc-shaped baffle (13) is rotatably connected to a rotating shaft (1301), and the rotating shaft (1301) is rotatably mounted inside the corresponding feed channel (12). A plurality of supporting springs (1501) are fixed between the transmission baffle (15) and the inner wall of the arc-shaped notch (14). A return spring (1601) is fixedly mounted between one end of the transmission push rod (16) away from the arc-shaped baffle (13) and the inner wall of the arc-shaped notch (14).

4. A portable sampling device for geotechnical engineering investigation according to claim 1, characterized in that: A bottom loading ring (17) is fixedly installed inside the sampling drill rod (6), the top surface of the bottom loading ring (17) is kept flush with the feed channel (12), and a recovery notch (1701) is provided inside the bottom loading ring (17).

5. The portable sampling device for geotechnical engineering investigation according to claim 1, characterized in that: A plug-in block (8) is inserted into the end of the sampling drill rod (6) for driving the sampling column (9) to rotate inside the sampling drill rod (6); the end of the sampling column (9) passes through the plug-in block (8) and is rotatably connected thereto; a servo motor (802) is fixedly installed inside the plug-in block (8); a transmission belt (803) is rotatably connected between the output end of the servo motor (802) and the end of the sampling column (9); a power supply module (801) is fixedly installed inside the plug-in block (8); and a lifting frame (804) is fixedly installed on the top surface of the plug-in block (8).

6. A portable sampling device for geotechnical engineering investigation according to claim 1, characterized in that: The driving assembly comprises a driving gear (701), a driving motor is installed inside the transmission disc (4), and the driving gear (701) is fixedly sleeved on the output end of the driving motor, and a transmission gear (7) is fixedly sleeved on the end of the sampling drill rod (6), and the transmission gear (7) and the driving gear (701) are meshed with each other.

7. A portable sampling device for geotechnical engineering investigation according to claim 1, characterized in that: A notch (401) is provided inside the transmission disc (4), a bearing (602) is sleeved on the end of the sampling drill rod (6), the bearing (602) is rotatably connected inside the notch (401), and positioning screws (402) are rotatably connected on both sides of the notch (401), and the positioning screws (402) are used to lock the installation position of the bearing (602).

8. A portable sampling device for geotechnical engineering investigation according to claim 7, characterized in that: A pressure plate (5) is fixedly mounted on the top surface of the transmission plate (4), the piston end of the hydraulic cylinder (3) is coaxial with the pressure plate (5), both sides of the interior of the limiting frame (1) are provided with sliding grooves (101), the transmission plate (4) is slidably connected to the sliding grooves (101), and a counterweight frame (2) is provided at the end of the limiting frame (1).

9. A portable sampling device for geotechnical engineering investigation according to claim 1, characterized in that: A cleaning frame (102) is slidably connected to the interior of the limiting frame (1) in an up-and-down manner, and a through hole is provided in the interior of the cleaning frame (102) for allowing a sampling drill rod (6) to pass through.

10. A portable sampling device for geotechnical engineering investigation according to claim 9, characterized in that: A plurality of cleaning brushes (103) are fixedly mounted on the bottom of the cleaning frame (102) and are used to clean the surface of the sampling drill rod (6).

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