Soil sampling equipment for hydrogeological survey

Abstract

The invention relates to the technical field of soil sampling, and particularly discloses a soil sampling device for hydrogeological survey, comprising: a movable support; limiting grooves are formed in the middles of the inner walls of the two sides of the movable support, and a movable mechanism is jointly installed between the two limiting grooves. The sampling mechanism comprises a sampling drill rod, a sampling motor, a spiral blade, an adjusting cavity, a sampling groove and a fixing plate, and the sampling drill rod is mounted on the moving mechanism; driving of the sampling motor is matched with movement of the moving mechanism, the sampling drill rod rotatably drills into soil, then the driving motor is started, rotation of a sampling spiral blade is achieved through meshing transmission between a first bevel gear and a second bevel gear, and the soil can be conveyed into a sampling groove; by arranging the multiple sampling grooves, respective sampling of each layer of soil can be achieved, so that the sampling accuracy is improved, and finally, sample removal operation of the sampled soil can be achieved by reversely starting the motor.

Description

Technical Field

[0001] The invention belongs to the technical field of soil sampling, and in particular relates to soil sampling equipment for hydrogeological survey. Background Art

[0002] Hydrogeological survey is a basic method for studying hydrogeological conditions in the field. It studies and judges the formation, distribution, dynamic changes and utilization and improvement of groundwater through observation, description, recording and comprehensive analysis and comparison of the interaction between groundwater, surface water and rock and soil. In this process, soil sampling equipment is an indispensable tool. It is used to collect representative soil or rock and soil samples from underground for subsequent laboratory analysis.

[0003] In the Chinese patent with publication number CN217819462U, a soil sampling device for hydrogeological survey is mentioned. When in use, the base is moved to a suitable position, and the top frame is pressed downward to a suitable position. At this time, the bottom lifting rod and the fixed frame are contracted by the extrusion spring, and can be fixed by the clamping rod. The distance between the lifting rod and the fixed frame can be flexibly and conveniently controlled, and the overall height of the control device can be flexibly and conveniently adjusted. The operation is convenient and flexible, so as to facilitate the subsequent drilling operation of the drill rod. At the same time, the height adjustment operation is also convenient for excavation sampling operations at different depths;

[0004] However, when collecting soil samples, the sampling device will improperly mix the various layers of the soil, which greatly reduces the accuracy of sampling and makes it difficult for researchers to make targeted sample selections based on the different depth requirements of the soil. In addition, after sampling is completed, the soil sample removal process is also quite cumbersome, further increasing the difficulty of use, thereby limiting the effectiveness and efficiency of the device in practical applications. Summary of the invention

[0005] The object of the present invention is to provide a soil sampling device for hydrogeological survey to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A soil sampling device for hydrogeological survey, comprising:

[0008] Mobile stand;

[0009] The middle parts of the inner walls on both sides of the movable bracket are provided with limiting grooves, and a moving mechanism is installed between the two limiting grooves;

[0010] A sampling mechanism, the sampling mechanism comprising a sampling drill rod, a sampling motor, a spiral blade, an adjustment chamber, a sampling slot and a fixed plate, the sampling drill rod is installed on the moving mechanism, the sampling motor is installed on the top of the sampling drill rod, the spiral blade is installed on the outer surface of the sampling drill rod, the adjustment chamber is opened inside the sampling drill rod, a plurality of sampling slots are provided, and the plurality of sampling slots are opened on one side inner wall of the adjustment chamber, and the fixed plate is installed on the upper part of the inner wall of the adjustment chamber;

[0011] A softening mechanism is installed at the lower part of the outer wall of one side of the mobile support, and the softening mechanism can be used to soften the soil.

[0012] Preferably, a controller is installed in the middle of the outer wall of one side of the softening mechanism, universal wheels are installed at the four corners of the bottom end of the mobile bracket, two support plates are installed on the bottom inner walls on both sides of the mobile bracket, and a handrail is installed at the lower part of the outer wall on the other side of the mobile bracket.

[0013] Preferably, a driving motor is installed at the top of the fixed plate, a rotating shaft is installed at the bottom end of the fixed plate through a bearing, a plurality of first bevel teeth are installed on the outer surface of the rotating shaft, isolation plates are installed on the inner walls of several sampling slots, transmission shafts are installed at one end of several isolation plates through bearings, sampling screw blades are installed on the outer surfaces of several transmission shafts, and second bevel teeth are installed at one end of several transmission shafts.

[0014] Preferably, the second bevel gear is meshed with the corresponding first bevel gear, the driving motor and the sampling motor are both electrically connected to the controller, and the top end of the sampling drill rod is mounted on the bottom end of the moving plate through a bearing.

[0015] Preferably, the movable mechanism includes an adjusting screw, an adjusting plate, a fixed rod, a fixed plug, a movable plate and a guide groove, and two of the adjusting screws and the adjusting plates are provided, and the two adjusting screws are respectively installed in the inside of the two limit grooves through bearings, and the two adjusting plates are respectively installed in the lower part of the outer surface of the two adjusting screws, and the six fixed rods and the fixed plugs are respectively provided, and the six fixed rods are respectively installed at the bottom ends of the two adjusting plates, and the six fixed plugs are respectively installed at the bottom ends of the six fixed rods, and the movable plate is installed in the upper part of the outer surface of the two adjusting screws, and four guide grooves are provided, and the four guide grooves are respectively opened at the four corners of the top end of the movable plate.

[0016] Preferably, a single pulley is installed on the upper part of the outer surface of the two adjusting screws, a synchronous belt is sleeved on the middle part of the outer surface of the two single pulleys, a double pulley is commonly sleeved between the two synchronous belts, the bottom end of the double pulley is installed on the top of the movable bracket through a bearing, a protective cover is installed on the top of the double pulley through a bearing, the bottom end of the protective cover is installed on the top of the movable bracket, and a drive is installed in the middle part of the top of the protective cover.

[0017] Preferably, the driver is electrically connected to the controller, the single pulley, synchronous belt and double pulley are all located inside the protective cover, the length of the guide groove is consistent with the thickness of the movable bracket, the diameter of the top surface of the fixed plug is larger than the diameter of the fixed rod, and the adjustment plate is set as a T-shaped structure.

[0018] Preferably, the softening mechanism includes a water tank, a water filling pipe, a water pump, a water delivery pipe, a diversion pipe and a softening nozzle. The water tank is installed on the outer wall of the movable bracket, the water filling pipe is installed on the top of the water tank, the water pump is installed on the lower part of the outer wall on the other side of the water tank, the water delivery pipe is installed on the top of the water pump, two diversion pipes are provided, and the two diversion pipes are respectively installed at both ends of the water delivery pipe, and the other ends of the two diversion pipes are respectively installed on the inner walls on both sides of the movable bracket, and a number of softening nozzles are provided, and the plurality of softening nozzles are respectively installed at the bottom end of the water delivery pipe and the bottom ends of the two diversion pipes.

[0019] Preferably, the water pump is electrically connected to the controller, the water delivery pipe is arranged as a ring structure, the diversion pipe is arranged as a T-shaped structure, and the softening nozzle is arranged as an inclined structure.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] (1) The present invention sets a sampling mechanism inside the moving mechanism. The sampling drill rod rotates and drills into the soil by driving the sampling motor and coordinating the movement of the moving mechanism. Then, the driving motor is started, and the sampling screw blade is rotated by the meshing transmission between the first bevel gear and the second bevel gear, so that the soil can be transported to the sampling slot. By setting a plurality of sampling slots, each layer of soil can be sampled separately, thereby improving the sampling accuracy. Finally, the sampling soil can be removed by starting the motor in reverse.

[0022] (2) The present invention sets a moving mechanism inside the moving bracket. Through the drive of the driver, in cooperation with the transmission mechanism between the pulley and the belt, the two adjusting screws can be driven to rotate synchronously. During this process, the moving plate will drive the sampling mechanism to move downward stably for sampling. At the same time, the adjusting plate will also drive the fixed rod to move downward and insert into the soil. The insertion of the fixed rod stabilizes the sampling device, thereby improving the stability of the sampling device during the sampling process.

[0023] (3) The present invention sets a softening mechanism on the outer surface of the movable bracket. By starting the water pump to extract water, the water is then diverted to a plurality of softening nozzles through the annular water pipe and the T-shaped diversion pipe. These nozzles can spray water evenly. The sprayed water can be sprayed on the soil under the sampling drill rod and the fixed rods on both sides to soften it. The softened soil is conducive to the rapid insertion of the sampling drill rod and the fixed rod. At the same time, the sprayed water can also effectively reduce the dust generated during the sampling process. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 One of the three-dimensional diagrams of the present invention;

[0025] Figure 2 This is the second stereogram of the present invention;

[0026] Figure 3 is a three-dimensional diagram of the mobile mechanism of the present invention;

[0027] Figure 4 is a cross-sectional view of the protective cover of the present invention;

[0028] Figure 5 is a cross-sectional view of the sampling mechanism of the present invention;

[0029] Figure 6 For the present invention Figure 5 A magnified view of middle;

[0030] Figure 7 is a three-dimensional diagram of the softening mechanism of the present invention;

[0031] In the figure: 1. Mobile bracket; 2. Limiting groove; 3. Mobile mechanism; 4. Sampling mechanism; 5. Softening mechanism; 6. Controller; 7. Universal wheel; 8. Support plate; 9. Handrail;

[0032] 31. Adjusting screw; 32. Adjusting plate; 33. Fixing rod; 34. Fixing plug; 35. Moving plate; 36. Guide groove; 37. Single pulley; 38. Synchronous belt; 39. Double pulley; 310. Protective cover; 311. Driver;

[0033] 41. sampling drill rod; 42. sampling motor; 43. spiral blade; 44. adjusting chamber; 45. sampling slot; 46. fixing plate; 47. driving motor; 48. rotating shaft; 49. first bevel gear; 410. isolation plate; 411. transmission shaft; 412. sampling spiral blade; 413. second bevel gear;

[0034] 51. Water storage tank; 52. Water filling pipe; 53. Water pump; 54. Water supply pipe; 55. Diversion pipe; 56. Softening nozzle. DETAILED DESCRIPTION

[0035] 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.

[0036] Embodiment 1:

[0037] See also Figures 1 to 7 As shown, a soil sampling device for hydrogeological survey comprises:

[0038] Mobile bracket 1;

[0039] The middle part of the inner wall of both sides of the movable bracket 1 is provided with a limit groove 2, and a movable mechanism 3 is installed between the two limit grooves 2;

[0040] The sampling mechanism 4 includes a sampling drill rod 41, a sampling motor 42, a spiral blade 43, an adjustment chamber 44, a sampling slot 45 and a fixing plate 46. The sampling drill rod 41 is installed on the moving mechanism 3, the sampling motor 42 is installed on the top of the sampling drill rod 41, the spiral blade 43 is installed on the outer surface of the sampling drill rod 41, the adjustment chamber 44 is opened inside the sampling drill rod 41, a plurality of sampling slots 45 are provided, and the plurality of sampling slots 45 are opened on one side inner wall of the adjustment chamber 44, and the fixing plate 46 is installed on the upper part of the inner wall of the adjustment chamber 44;

[0041] The softening mechanism 5 is installed at the lower part of the outer wall of one side of the mobile bracket 1, and the softening mechanism 5 can be used to soften the soil.

[0042] Depend on Figure 5 and Figure 6 It can be seen that a controller 6 is installed in the middle of the outer wall of one side of the softening mechanism 5, universal wheels 7 are installed at the four corners of the bottom end of the mobile bracket 1, two support plates 8 are installed on the inner walls of the bottom of both sides of the mobile bracket 1, and a handrail 9 is installed at the lower part of the outer wall of the other side of the mobile bracket 1;

[0043] A driving motor 47 is installed at the top of the fixed plate 46, and a rotating shaft 48 is installed at the bottom of the fixed plate 46 through a bearing. A plurality of first bevel teeth 49 are installed on the outer surface of the rotating shaft 48. Isolation plates 410 are installed on the inner walls of a plurality of sampling slots 45. A transmission shaft 411 is installed at one end of a plurality of isolation plates 410 through a bearing. Sampling screw blades 412 are installed on the outer surfaces of a plurality of transmission shafts 411, and a second bevel tooth 413 is installed at one end of a plurality of transmission shafts 411.

[0044] As can be seen from the above, during the sampling process, the sampling motor 42 and the moving mechanism 3 can be controlled by the controller 6 to start, thereby driving the sampling drill rod 41 to rotate and drill into the soil. At this time, the spiral blade 43 on the sampling drill rod 41 will cut the soil. Subsequently, the controller 6 controls the drive motor 47 to start, so that the rotating shaft 48 drives the multiple first bevel teeth 49 installed thereon to rotate. Through the meshing transmission of the multiple first bevel teeth 49 and the multiple second bevel teeth 413 respectively, the multiple transmission shafts 411 will rotate accordingly and drive the sampling spiral blades 412 thereon to rotate. In this way, the sampling spiral blades 412 can transport the cut soil to the corresponding sampling slots 45. By setting Multiple sampling slots 45 can realize separate sampling of each layer of soil, avoiding improper mixing of each layer of soil, which is beneficial for researchers to carry out targeted sample selection according to the different depth requirements of the soil and improves the accuracy of sampling. Finally, the controller 6 reversely starts the sampling motor 42, the moving mechanism 3 and the driving motor 47 to remove the sampling drill rod 41 from the soil. Finally, the sampling screw blade 412 discharges the sampled soil from the sampling slot 45 to realize the sampling operation of the sampled soil. This design makes it convenient to remove soil samples with good viscosity, reduces the difficulty of using the sampling equipment, and also expands the effect of the equipment in practical applications and improves efficiency.

[0045] Specifically, refer to Figure 5 and Figure 6 As shown, the second bevel gear 413 is meshed with the corresponding first bevel gear 49 , the driving motor 47 and the sampling motor 42 are both electrically connected to the controller 6 , and the top end of the sampling drill rod 41 is mounted on the bottom end of the moving plate 35 through a bearing.

[0046] As can be seen from the above, the power of the driving motor 47 can be transmitted to the transmission shaft 411, thereby driving it to rotate for soil sampling. The controller 6 can receive operating instructions and control the start, stop, speed, etc. of the driving motor 47 and the sampling motor 42 through electrical signals, so as to facilitate the moving plate 35 to stably move the position of the sampling drill rod 41.

[0047] Embodiment 2:

[0048] refer to Figures 1 to 4As shown, the moving mechanism 3 includes an adjusting screw 31, an adjusting plate 32, a fixing rod 33, a fixing plug 34, a moving plate 35 and a guide groove 36. Two adjusting screws 31 and two adjusting plates 32 are provided. The two adjusting screws 31 are respectively installed in the two limiting grooves 2 through bearings. The two adjusting plates 32 are respectively installed at the lower part of the outer surface of the two adjusting screws 31. There are six fixing rods 33 and six fixing plugs 34. The six fixing rods 33 are respectively installed at the bottom ends of the two adjusting plates 32. The six fixing plugs 34 are respectively installed at the bottom ends of the six fixing rods 33. The moving plate 35 is installed at the upper part of the outer surface of the two adjusting screws 31. There are four guide grooves 36, which are respectively opened at the four corners of the top end of the moving plate 35.

[0049] A single pulley 37 is installed on the upper part of the outer surface of the two adjusting screws 31, and a synchronous belt 38 is sleeved in the middle part of the outer surface of the two single pulleys 37. A double pulley 39 is sleeved between the two synchronous belts 38. The bottom end of the double pulley 39 is installed on the top of the movable bracket 1 through a bearing, and a protective cover 310 is installed on the top of the double pulley 39 through a bearing. The bottom end of the protective cover 310 is installed on the top of the movable bracket 1, and a driver 311 is installed in the middle part of the top of the protective cover 310.

[0050] As can be seen from the above, first, by holding the handrail frame 9 and pushing the mobile bracket 1 to move, the sampling device can be moved to the sampling position through the universal wheel 7, and then the brake of the universal wheel 7 is braked to stabilize the device. Subsequently, the controller 6 controls the driver 311 to start, driving the double pulley 39 to drive the two synchronous belts 38 to rotate. In this process, the synchronous belt 38 further drives the single pulley 37 to rotate, and drives the two adjusting screws 31 to rotate respectively. Under the limiting action of the limiting groove 2, the adjusting plate 32 will stably drive the three fixing rods 33 thereon to move downward until they are inserted into the soil, and the conical fixing plug 34 on the fixing rod 33 is fixed. The design makes the insertion process more convenient. At the same time, the insertion of the fixed rod 33 provides a stable support for the sampling equipment and improves the stability during the sampling process. At the same time, the movable plate 35, driven by the adjusting plate 32, will stably move the sampling mechanism 4 downward until the sampling mechanism 4 drills into the soil for sampling. After the sampling is completed, the driver 311 starts in reverse, driving the movable plate 35 to drive the sampling mechanism 4 to move upward to take out the sample from the soil. At the same time, the adjusting plate 32 also drives the fixed rod 33 to move upward and pull it out of the soil. At this time, the fixed plug 34 plays a limiting role to prevent the fixed rod 33 from moving excessively upward.

[0051] Preferably, reference Figures 1 to 4As shown, the driver 311 is electrically connected to the controller 6, the single pulley 37, the synchronous belt 38 and the double pulley 39 are all located inside the protective cover 310, the length of the guide groove 36 is consistent with the thickness of the movable bracket 1, the diameter of the top surface of the fixed plug 34 is larger than the diameter of the fixed rod 33, and the adjustment plate 32 is set to a T-shaped structure.

[0052] As can be seen from the above, the driver 311 is able to receive control instructions and realize precise movement control. The protective cover 310 plays a protective role to prevent the transmission components from being damaged, and it is convenient to limit the guide groove 36 on the mobile bracket 1, thereby improving the stability of the mobile plate 35 during the movement. The fixed plug 34 plays a limiting role on the fixed rod 33, so that the fixed plug 34 will not separate from the mobile bracket 1, and it is convenient to limit the adjustment plate 32 in the limiting groove 2, thereby improving the stability of the adjustment plate 32 during the movement.

[0053] Embodiment three:

[0054] refer to Figure 7 As shown, the softening mechanism 5 includes a water storage tank 51, a water supply pipe 52, a water pump 53, a water delivery pipe 54, a diverter pipe 55 and a softening nozzle 56. The water storage tank 51 is installed on the outer wall of the mobile bracket 1, the water supply pipe 52 is installed at the top of the water storage tank 51, the water pump 53 is installed at the lower part of the outer wall on the other side of the water storage tank 51, the water delivery pipe 54 is installed at the top of the water pump 53, two diverter pipes 55 are provided, and the two diverter pipes 55 are respectively installed at both ends of the water delivery pipe 54, and the other ends of the two diverter pipes 55 are respectively installed on the inner walls on both sides of the mobile bracket 1, and a plurality of softening nozzles 56 are provided, and the plurality of softening nozzles 56 are respectively installed at the bottom end of the water delivery pipe 54 and the bottom ends of the two diverter pipes 55.

[0055] As can be seen from the above, before the device takes samples, the water pump 53 is started by the controller 6. The water pump 53 draws water from the water tank 51 and inputs it into the annular water pipe 54. The water then flows into two T-shaped diversion pipes 55 and is finally diverted to a number of inclined softening nozzles 56. These nozzles can spray water evenly to soften the soil under the sampling drill rod 41 and the fixed rods 33 on both sides. The softened soil is conducive to the rapid insertion of the sampling drill rod 41 and the fixed rod 33. At the same time, the water evenly sprayed by the softening nozzles 56 can also effectively reduce the dust generated during the sampling process, thereby reducing dust pollution during the sampling process and effectively protecting the environment and the health of operators.

[0056] Preferably, reference Figure 7 As shown, the water pump 53 is electrically connected to the controller 6, the water delivery pipe 54 is set to a ring structure, the diversion pipe 55 is set to a T-shaped structure, and the softening nozzle 56 is set to an inclined structure.

[0057] As can be seen from the above, water flow control is achieved, so that the water pump 53 can be started or stopped according to the operating instructions, thereby controlling the supply of water flow, achieving uniform water supply and expanding the water spraying range, so that the diversion pipe 55 can achieve uniform water supply at multiple points, and the inclined structure enables the softening nozzle 56 to more effectively spray water into the soil, thereby improving the softening effect and sampling efficiency.

[0058] Application examples:

[0059] The present design is widely used in the fields of geological prospecting, environmental monitoring and agricultural research, and plays an important role in hydrogeological surveys in particular. By setting up a moving mechanism 3, the present design can realize the stable movement and precise position fixation of the sampling mechanism 4, thereby ensuring the accuracy and representativeness of the sampling points. The sampling mechanism 4 adopts a rotating method to drill the sampling drill rod 41 into the soil, and realizes the layered sampling function through a number of independent sampling slots 45, which effectively avoids the mixing of each layer of soil, ensures the representativeness and accuracy of the collected soil samples, and provides reliable data support for subsequent analysis and testing. In addition, the present design is also convenient for the removal of sampled soil, and can quickly and accurately collect soil samples of the required depth, thereby improving the sampling efficiency. At the same time, the softening mechanism 5 sprays water to the soil to moisten and soften the soil, thereby reducing the soil hardness, making it easier to collect soil samples, reducing the resistance during the sampling process, and helping to reduce dust pollution, protecting the environment and the health of operators.

[0060] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A soil sampling device for hydrogeological survey, characterized in that: include: Mobile support (1); The middle parts of the inner walls on both sides of the movable bracket (1) are provided with limiting grooves (2), and a moving mechanism (3) is installed between the two limiting grooves (2); A sampling mechanism (4), the sampling mechanism (4) comprising a sampling drill rod (41), a sampling motor (42), a spiral blade (43), an adjusting chamber (44), a sampling slot (45) and a fixing plate (46), the sampling drill rod (41) being mounted on the moving mechanism (3), the sampling motor (42) being mounted on the top of the sampling drill rod (41), the spiral blade (43) being mounted on the outer surface of the sampling drill rod (41), the adjusting chamber (44) being arranged inside the sampling drill rod (41), a plurality of the sampling slots (45) being arranged, the plurality of the sampling slots (45) being arranged on one inner wall of the adjusting chamber (44), and the fixing plate (46) being mounted on the upper inner wall of the adjusting chamber (44); A softening mechanism (5) is installed at the lower part of an outer wall of one side of the mobile support (1), and the softening mechanism (5) can be used to soften soil.

2. A soil sampling device for hydrogeological survey according to claim 1, characterized in that: A controller (6) is installed in the middle of the outer wall of one side of the softening mechanism (5), universal wheels (7) are installed at the four corners of the bottom end of the movable bracket (1), two support plates (8) are installed on the inner walls of the bottom of both sides of the movable bracket (1), and a handrail frame (9) is installed at the lower part of the outer wall of the other side of the movable bracket (1).

3. A soil sampling device for hydrogeological survey according to claim 2, characterized in that: A driving motor (47) is installed at the top end of the fixed plate (46), a rotating shaft (48) is installed at the bottom end of the fixed plate (46) through a bearing, a plurality of first bevel teeth (49) are installed on the outer surface of the rotating shaft (48), isolation plates (410) are installed on the inner walls of a plurality of sampling slots (45), a transmission shaft (411) is installed at one end of a plurality of the isolation plates (410) through a bearing, a sampling screw blade (412) is installed on the outer surface of a plurality of the transmission shafts (411), and a second bevel tooth (413) is installed at one end of a plurality of the transmission shafts (411).

4. A soil sampling device for hydrogeological survey according to claim 3, characterized in that: The second bevel gear (413) is meshed with the corresponding first bevel gear (49), the driving motor (47) and the sampling motor (42) are both electrically connected to the controller (6), and the top end of the sampling drill rod (41) is mounted on the bottom end of the moving plate (35) through a bearing.

5. The soil sampling device for hydrogeological survey according to claim 1, characterized in that: The moving mechanism (3) comprises an adjusting screw (31), an adjusting plate (32), a fixing rod (33), a fixing plug (34), a moving plate (35) and a guide groove (36). The adjusting screw (31) and the adjusting plate (32) are both provided with two, and the two adjusting screws (31) are respectively installed in the inside of the two limiting grooves (2) through bearings. The two adjusting plates (32) are respectively installed on the lower part of the outer surface of the two adjusting screws (31). The fixing rod (33) and the fixing plug (34) are both provided with six, and the six fixing rods (33) are respectively installed on the bottom ends of the two adjusting plates (32). The six fixing plugs (34) are respectively installed on the bottom ends of the six fixing rods (33). The moving plate (35) is installed on the upper part of the outer surface of the two adjusting screws (31). The guide grooves (36) are provided with four, and the four guide grooves (36) are respectively opened at the four corners of the top end of the moving plate (35).

6. The soil sampling device for hydrogeological survey according to claim 5, characterized in that: Single pulleys (37) are installed on the upper parts of the outer surfaces of the two adjusting screws (31), synchronous belts (38) are sleeved on the middle parts of the outer surfaces of the two single pulleys (37), a double pulley (39) is sleeved between the two synchronous belts (38), the bottom ends of the double pulleys (39) are installed on the top end of the movable bracket (1) through bearings, a protective cover (310) is installed on the top end of the double pulleys (39) through bearings, the bottom end of the protective cover (310) is installed on the top end of the movable bracket (1), and a driver (311) is installed in the middle part of the top end of the protective cover (310).

7. A soil sampling device for hydrogeological survey according to claim 6, characterized in that: The driver (311) is electrically connected to the controller (6); the single pulley (37), the synchronous belt (38) and the double pulley (39) are all located inside the protective cover (310); the length of the guide groove (36) is consistent with the thickness of the movable bracket (1); the diameter of the top surface of the fixed plug (34) is larger than the diameter of the fixed rod (33); and the adjustment plate (32) is set to a T-shaped structure.

8. The soil sampling device for hydrogeological survey according to claim 1, characterized in that: The softening mechanism (5) comprises a water storage tank (51), a water supply pipe (52), a water pump (53), a water delivery pipe (54), a diverter pipe (55) and a softening nozzle (56). The water storage tank (51) is mounted on the outer wall of the movable bracket (1), the water supply pipe (52) is mounted on the top of the water storage tank (51), the water pump (53) is mounted on the lower part of the outer wall on the other side of the water storage tank (51), the water delivery pipe (54) is mounted on the top of the water pump (53), two diverter pipes (55) are provided, the two diverter pipes (55) are respectively mounted on the two ends of the water delivery pipe (54), and the other ends of the two diverter pipes (55) are respectively mounted on the inner walls on both sides of the movable bracket (1), and a plurality of softening nozzles (56) are provided, the plurality of softening nozzles (56) are respectively mounted on the bottom end of the water delivery pipe (54) and the bottom ends of the two diverter pipes (55).

9. The soil sampling device for hydrogeological survey according to claim 8, characterized in that: The water pump (53) is electrically connected to the controller (6), the water delivery pipe (54) is configured as a ring structure, the diversion pipe (55) is configured as a T-shaped structure, and the softening nozzle (56) is configured as an inclined structure.

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