A sampling device for water conservancy and environmental geological survey

Abstract

The present application relates to a sampling device for water conservancy and environmental geological survey, comprising a bottom plate and a top plate, the bottom plate is connected with a support plate fixed to the top plate, the top plate is connected with a sampling tube, and a driving assembly for driving the sampling tube to move, the bottom plate is provided with a through hole for the sampling tube to pass through, the bottom plate is provided with cavities at positions on both sides of the through hole, each cavity is provided with a vertically placed reinforcement rod, the reinforcement rod is connected with a support spring, the lower end of the support spring is connected to the bottom wall of the cavity, the lower surface of the bottom plate is provided with a hole for the reinforcement rod to pass through; the top surface of the cavity is connected with a guide rod slidably plugged with the reinforcement rod, the guide rod is slidably plugged with a pressure plate in contact with the upper surface of the reinforcement rod, the side of the pressure plate close to the through hole is inclined downward, and the cavity is also provided with a power piece that supports the pressure plate and drives the pressure plate to move along its length direction. The present application has the effect of improving the qualified rate of samples taken by the sampling device.

Description

Technical Field

[0001] The present application relates to the field of devices for water conservancy, environmental and geological surveys, and in particular to a sampling device for water conservancy, environmental and geological surveys. Background Art

[0002] A sampling device for hydrogeological and environmental geological surveys is a device used to dig soil samples in hydrogeological surveys, engineering geological surveys or environmental geological surveys; a common sampling device includes a bottom plate and a top plate parallel to each other, and columns fixed to the bottom plate are provided on both sides of the top plate, the top plate is slidably connected to the columns, and a sampling tube for sampling is connected to the lower surface of the top plate, and a driving member for driving the top plate to move in the height direction is installed on one of the columns.

[0003] When sampling, the operator places the base plate on the ground, and then controls the driving member to move the sampling tube downward and insert it into the soil. When the sampling tube moves into place, the driving member is controlled to move the sampling tube upward and reset, so that the sampling tube brings out the soil sample, thus completing the sampling.

[0004] When the sampling ground is tilted, the sampling tube may cause the entire device to rotate and tilt due to uneven force as it moves underground, causing the sampling tube to tilt and the position of the soil sample taken by the sampling tube to change, resulting in unqualified samples and a reduced pass rate for samples taken by the sampling device. Summary of the invention

[0005] In order to improve the pass rate of samples taken by a sampling device, the present application provides a sampling device for water conservancy, environmental and geological surveys.

[0006] The present application provides a sampling device for water conservancy and environmental geological survey using the following technical solution:

[0007] A sampling device for water conservancy and environmental geological survey, comprising a bottom plate and a top plate, the bottom plate is connected to a support plate fixed to the top plate, the top plate is connected to a sampling tube and a driving assembly for driving the sampling tube to move, the bottom plate is provided with a through hole for the sampling tube to pass through, the bottom plate is provided with cavities at positions on both sides of the through hole, each cavity is provided with a vertically placed reinforcement rod, the reinforcement rod is connected to a support spring, the lower end of the support spring is connected to the bottom wall of the cavity, and the lower surface of the bottom plate is provided with a hole for the reinforcement rod to pass through;

[0008] A guide rod slidably inserted into the reinforcement rod is connected to the top surface of the cavity, and a pressure plate in contact with the upper surface of the reinforcement rod is slidably inserted on the guide rod. The side of the pressure plate close to the through hole is inclined downward. A power part supporting the pressure plate and driving the pressure plate to move along its length direction is also provided in the cavity.

[0009] By adopting the above technical solution, in the initial state, the support spring supports the reinforcement rod so that the reinforcement rod abuts against the pressure plate, and the reinforcement rod is completely located in the cavity; when the operator controls the driving assembly to move the sampling tube downward, the power part drives the lower side of the pressure plate to move toward the direction close to the reinforcement rod, and the pressure plate pushes the reinforcement rod to move downward and insert into the soil, thereby fixing the bottom plate and the ground, reducing the situation where the sampling tube is unevenly stressed and causing the entire sampling device to tilt, so that the position of the soil sample taken by the sampling tube is consistent with the predetermined position, and improving the qualified rate of the samples taken by the sampling device.

[0010] When the sampling is completed, the operator controls the driving assembly to move the sampling tube upward. At the same time, the power part works to move the higher side of the pressure plate toward the reinforcement rod. The support spring restores its deformation and pushes the reinforcement rod upward until the reinforcement rod returns to its initial position. At this time, the reinforcement rod is separated from the soil, and the operator can transfer the sampling device.

[0011] Optionally, the power member includes a power block slidably inserted in the cavity, one side of the power block penetrates the cavity wall of the cavity and extends into the through hole, the side wall of the power block close to the through hole is bent in a direction close to the through hole, and the pressure plate is connected to the corresponding power block;

[0012] A return spring is connected to the power block, which is connected to the cavity wall. The return spring limits the power block so that the maximum distance between the two relative power blocks is greater than the outer diameter of the sampling tube, and the minimum distance between the two relative power blocks is less than the outer diameter of the sampling tube.

[0013] By adopting the above technical solution, when the sampling tube moves downward, the sampling tube first contacts the power block and pushes the power block to move into the cavity, and the power block drives the lower side of the pressure plate to move toward the direction close to the reinforcement rod. At the same time, the power block also compresses the reset spring. When the lower surface of the sampling tube is lower than the most convex point of the power block, the power block stops moving; when the sampling tube moves upward and the lower surface of the sampling tube is higher than the most convex point of the power block, as the sampling tube moves, the reset spring restores its deformation and pushes the power block and the pressure plate to move, so that the high side of the pressure plate moves toward the direction close to the reinforcement rod.

[0014] Optionally, a sliding block is connected to the power block, and a sliding groove corresponding to the sliding block is opened on the inner bottom wall of the cavity, the sliding groove and the pressure plate have the same length direction, and the sliding block is slidably inserted in the corresponding sliding groove.

[0015] By adopting the above technical solution, the sliding block cooperates with the sliding groove, so that the power block is slidably connected to the inner bottom wall of the cavity.

[0016] Optionally, a transverse plate is connected to the power block, and the pressure plate is fixed to an end of the transverse plate away from the power block.

[0017] By adopting the above technical solution and setting the cross plate, the inclination angle of the pressing plate can be as large as possible, so that the pressing plate can push the reinforcing rod deeper into the soil, and the reinforcing rod has a better fixing effect on the base plate and the soil.

[0018] Optionally, the driving assembly includes a motor fixedly connected to the top plate, the output shaft of the motor is connected to a driving rod located below the top plate, the sampling tube is sleeved outside the driving rod and threadedly connected to the driving rod, the bottom plate is connected to a limiting rod located on one side of the sampling tube, the limiting rod is sleeved with a guide ring, and the guide ring is connected to the sampling tube.

[0019] By adopting the above technical solution, the output shaft of the motor rotates to drive the driving rod to rotate, and at the same time the limit rod and the guide ring limit the sampling cylinder, so that the sampling cylinder moves along its own axial direction. By controlling the rotation direction of the motor output shaft, the moving direction of the sampling cylinder can be changed.

[0020] Optionally, the guide ring is detachably connected to the sampling tube.

[0021] By adopting the above technical solution, it is convenient for operators to replace the sampling tube.

[0022] Optionally, the limiting rod is slidably connected to both the top plate and the bottom plate, and the limiting rod slides along the radial direction of the sampling tube;

[0023] The guide ring is connected with a plug-in block, and the sampling tube is provided with a plug-in hole adapted to the plug-in block;

[0024] The limiting rod is connected with a limiting spring, which is connected to the cavity wall of the cavity. The limiting spring enables the plug-in block to be plugged into the plug-in hole.

[0025] By adopting the above technical solution, when the operator needs to replace the sampling cylinder, the limit rod is pulled in the direction away from the sampling cylinder, the limit rod compresses the limit spring, and the limit rod drives the guide ring and the plug-in block to move until the plug-in block is separated from the sampling cylinder. At this time, the guide ring is released from the sampling cylinder, and the operator can rotate the sampling cylinder until the sampling cylinder is separated from the drive rod, and then take a new sampling cylinder and screw the new sampling cylinder onto the drive rod; loosen the limit rod, the limit spring restores its deformation and pushes the limit rod, the guide ring and the plug-in block to move until the plug-in block is plugged into the plug hole.

[0026] Optionally, a slider is connected to the end of the limiting rod, and a slide groove adapted to the slider is provided on the bottom plate and the top plate. The length direction of the slide groove is arranged along the radial direction of the sampling tube, and each slider is slidably inserted in the corresponding slide groove.

[0027] By adopting the above technical solution, the sliding block cooperates with the sliding groove so that the limiting rod is slidably connected with both the bottom plate and the top plate.

[0028] In summary, the present application includes at least one of the following beneficial technical effects:

[0029] By arranging the bottom plate, the top plate, the sampling tube, the driving assembly, the reinforcing rod, the pressing plate and the power part, the qualified rate of the samples taken by the sampling device is improved;

[0030] By setting a power block, a sliding block and a return spring, the pressure plate can be driven to move;

[0031] The sampling tube can be driven to move by arranging a motor, a driving rod and a limiting member. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the overall structure of the sampling device according to an embodiment of the present application.

[0033] Figure 2 It is a cross-sectional view of the overall structure of the sampling device according to an embodiment of the present application.

[0034] Figure 3 It is a cross-sectional view of the reinforcement component structure of an embodiment of the present application.

[0035] Figure 4 It is a cross-sectional view of the drive assembly structure of an embodiment of the present application.

[0036] Figure 5 It is a cross-sectional view showing the connection relationship between the guide rod and the pressure plate according to an embodiment of the present application.

[0037] Explanation of the accompanying drawings: 1. bottom plate; 11. through hole; 12. cavity; 13. sliding groove; 2. top plate; 3. support plate; 4. sampling tube; 41. plug-in hole; 5. driving assembly; 51. motor; 52. driving rod; 53. limiting member; 531. limiting rod; 532. sliding block; 533. sliding groove; 534. limiting spring; 535. guide ring; 536. plug-in block; 6. reinforcement assembly; 61. reinforcement rod; 611. convex ring; 62. support spring; 63. guide rod; 64. pressure plate; 641. strip hole; 642. cross plate; 65. power member; 651. power block; 652. sliding block; 653. reset spring. DETAILED DESCRIPTION

[0038] The following is combined with Figure 1-5 This application is described in further detail.

[0039] The present application embodiment discloses a sampling device for water conservancy and environmental geological survey. Figure 1 and Figure 2, including a bottom plate 1 and a top plate 2 which are parallel to each other, two support plates 3 are fixedly connected to the upper surface of the bottom plate 1, and the upper ends of the support plates 3 are fixed to the top plate 2; a sampling tube 4 is provided between the top plate 2 and the bottom plate 1, and the sampling tube 4 is located between the two support plates 3. A through hole 11 for the sampling tube 4 to pass through is opened on the bottom plate 1, and a driving component 5 which is connected to the sampling tube 4 and drives the sampling tube 4 to move is provided on the top plate 2.

[0040] Reference Figure 1 and Figure 2 The driving assembly 5 includes a motor 51 fixedly connected to the upper surface of the top plate 2, the output shaft of the motor 51 passes through the top plate 2, and a driving rod 52 is provided under the top plate 2. The driving rod 52 is fixedly connected to the output shaft of the motor 51, and the driving rod 52 is coaxial with the output shaft of the motor 51; the driving rod 52 is inserted into the sampling tube 4, and the driving rod 52 is threadedly connected to the sampling tube 4.

[0041] The driving assembly 5 also includes a limiting member 53 for limiting the sampling barrel 4, and the limiting member 53 enables the sampling barrel 4 to move in the height direction; the limiting member 53 includes at least one limiting rod 531. In this embodiment, two limiting rods 531 are provided, and the sampling barrel 4 is located between the two limiting rods 531.

[0042] Reference Figure 1 and Figure 3 The two ends of the limit rod 531 are fixedly connected with a slider 532, and the surfaces of the top plate 2 and the bottom plate 1 close to each other are provided with a slide groove 533 corresponding to the slider 532, and the length direction of the slide groove 533 is arranged along the length direction of the bottom plate 1. Each slider 532 is slidably inserted in the corresponding slide groove 533, and the slider 532 cooperates with the slide groove 533 to make the limit rod 531 slidably connected with the bottom plate 1 and the top plate 2. The side wall of the slider 532 away from the sampling tube 4 is fixedly connected with a limit spring 534, and the limit spring 534 is fixed to the groove wall of the slide groove 533 away from the sampling tube 4.

[0043] Reference Figure 2 and Figure 4 A guide ring 535 is sleeved on the limit rod 531, and a plug-in block 536 is fixedly connected to the guide ring 535. A plug-in hole 41 for the plug-in block 536 to be plugged into is opened on the sampling tube 4. The limit spring 534 enables the plug-in block 536 to be plugged into the plug-in hole 41. The plug-in block 536 cooperates with the plug-in hole 41 to make the guide ring 535 and the sampling tube 4 detachably connected.

[0044] When sampling, the operator starts the motor 51, and the output shaft of the motor 51 drives the driving rod 52 to rotate, and the driving rod 52 drives the sampling tube 4 to move. At the same time, the limiting rod 531 and the guide ring 535 cooperate to limit the sampling tube 4, so that the sampling tube 4 moves downward, and the sampling tube 4 passes through the through hole 11 and is inserted into the ground; in order to enable the operator to better grasp the position of the sampling tube 4, the limiting rod 531 is engraved with scale lines, and the operator can know the position of the sampling tube 4 by comparing the guide ring 535 with the scale lines.

[0045] When the sampling tube 4 descends to the expected depth, the motor 51 is turned off, and then the motor 51 is controlled to work, so that the motor 51 drives the driving rod 52 to rotate in the opposite direction, so that the sampling tube 4 moves upward, thereby taking out the taken soil sample; when the sampling tube 4 is reset, the operator turns off the motor 51, and finally takes the soil sample out of the sampling tube 4.

[0046] Reference Figure 3 and Figure 4 When the sampling cylinder 4 needs to be replaced, the operator pulls the limit rod 531 in the direction away from the sampling cylinder 4, and the limit rod 531 drives the slider 532 to move. At the same time, the slider 532 compresses the limit spring 534, and the limit rod 531 pulls the plug block 536 to move out of the plug hole 41; when the plug block 536 is separated from the sampling cylinder 4, the operator limits the limit rod 531, and then rotates the sampling cylinder 4 to separate the sampling cylinder 4 from the driving rod 52.

[0047] Take a new sampling tube 4 and screw it onto the driving rod 52, and finally loosen the limit rod 531. The limit spring 534 restores its deformation and pushes the limit rod 531 and the plug-in block 536 to move until the plug-in block 536 is inserted into the corresponding plug-in hole 41; the guide ring 535 is detachably connected to the sampling tube 4, so that the operator can easily replace the sampling tube 4.

[0048] Reference Figure 3 and Figure 5 The bottom plate 1 is also provided with a reinforcement component 6 for fixing the bottom plate 1 to the ground. Cavities 12 are provided at both sides of the through hole 11 in the bottom plate 1. The reinforcement component 6 includes a reinforcement rod 61. In this embodiment, each cavity 12 has a vertically placed reinforcement rod 61. In other embodiments, the number of reinforcement rods 61 can be increased or decreased according to actual conditions, and a hole for the reinforcement rod 61 to pass through is also opened on the bottom wall of the cavity 12.

[0049] The upper part of the circumferential side wall of the reinforcement rod 61 protrudes outward to form a circle of convex ring 611, and the lower surface of the convex ring 611 is fixedly connected to a support spring 62 which is sleeved on the reinforcement rod 61. The lower end of the support spring 62 is fixedly connected to the bottom cavity wall of the cavity 12. The support spring 62 supports the convex ring 611 and the reinforcement rod 61, so that the reinforcement rod 61 is located in the cavity 12 as a whole.

[0050] A guide rod 63 is slidably inserted at the top of the reinforcement rod 61, and the length direction of the guide rod 63 is set along the height direction of the base plate 1, and the guide rod 63 guides the reinforcement rod 61; the reinforcement component 6 also includes a pressing plate 64, and the length direction of the pressing plate 64 is set along the length direction of the base plate 1. A strip hole 641 is opened on the pressing plate 64 for the guide rod 63 to pass through, and the long direction of the strip hole 641 is set along the length direction of the pressing plate 64. The guide rod 63 is inserted in the strip hole 641, and the side of the pressing plate 64 close to the through hole 11 is tilted downward.

[0051] Reference Figure 3 , Figure 4 and Figure 5 The reinforcement component 6 also includes a power member 65 that supports the pressure plate 64 and drives the pressure plate 64 to move; the power member 65 includes a power block 651 that slides in each cavity 12, and the side wall of the power block 651 close to the through hole 11 is bent toward the direction close to the through hole 11, and the side of the power block 651 close to the through hole 11 passes through the side of the cavity 12 close to the through hole 11, and one side of the power block 651 extends into the through hole 11.

[0052] A horizontally placed cross plate 642 is fixedly connected to the side wall of the power block 651 away from the through hole 11, and the side of the pressure plate 64 close to the through hole 11 is fixed to the side of the cross plate 642 away from the through hole 11; due to the provision of the cross plate 642, the pressure plate 64 can be tilted as much as possible, so that the reinforcement rod 61 can be inserted deeper into the soil, thereby improving the fixing effect of the reinforcement rod 61 on the base plate 1.

[0053] A sliding block 652 is fixedly connected to the side wall of the power block 651 away from the through hole 11, and a sliding groove 13 adapted to the sliding block 652 is opened on the bottom cavity wall of the cavity 12. The length direction of the sliding groove 13 is set along the length direction of the bottom plate 1, and each sliding block 652 is slidably inserted in the corresponding sliding groove 13. The sliding block 652 cooperates with the sliding groove 13 to make the power block 651 slidably connected to the bottom wall of the cavity 12; in this embodiment, the number of sliding blocks 652 is two, and the reinforcement rod 61 is located between the two sliding grooves 13. In other embodiments, the number of sliding blocks 652 can be increased or decreased according to actual needs.

[0054] A return spring 653 is fixedly connected to the side wall of the sliding block 652 away from the power block 651, and the return spring 653 is also fixed to the groove wall of the sliding groove 13 away from the end of the through hole 11; the return spring 653 limits the power block 651, so that the maximum distance between the two power blocks 651 is greater than the outer diameter of the sampling tube 4, and the minimum distance between the two power blocks 651 is less than the outer diameter of the sampling tube 4.

[0055] In the initial state, the higher side of the pressure plate 64 is located directly above the reinforcement rod 61, and the top of the reinforcement rod 61 is in contact with the pressure plate 64. At this time, the reinforcement rod 61 is completely located in the cavity 12; when the sampling tube 4 moves downward, the sampling tube 4 first contacts the two power blocks 651. As the sampling tube 4 continues to move, the sampling tube 4 pushes the two power blocks 651 to move into the cavity 12, and at the same time compresses the reset spring 653; the movement of the power block 651 drives the cross plate 642 and the pressure plate 64 to move away from the through hole 11. When the pressure plate 64 moves, it pushes the reinforcement rod 61 downward, so that the reinforcement rod 61 is inserted into the soil.

[0056] When the upper surface of the sampling tube 4 is lower than the most convex point of the power block 651, the reinforcement rod 61 stops moving. At this time, the reinforcement rod 61 fixes the bottom plate 1 and the soil, reducing the overall skewness of the sampling device that causes the sampling tube 4 to tilt, thereby reducing the possibility of deviation in the position of the soil sample taken by the sampling tube 4 and improving the qualified rate of the samples taken by the sampling device.

[0057] During the upward movement of the sampling tube 4, when the upper surface of the sampling tube 4 is higher than the highest point of the power block 651, as the sampling tube 4 continues to move, the reset spring 653 restores its deformation and pushes the power block 651 to move out of the cavity 12. At the same time, the power block 651 drives the cross plate 642 and the pressure plate 64 to move, and the support spring 62 restores its deformation and pushes the convex ring 611 and the reinforcement rod 61 to move upward; when the sampling tube 4 moves to lose contact with the power block 651, the reset spring 653 and the support spring 62 both return to their initial state, and at this time the power block 651 and the reinforcement rod 61 both return to their initial position.

[0058] The implementation principle of a sampling device for hydraulic and environmental geological survey in an embodiment of the present application is as follows: start the motor 51 to rotate the driving rod 52, and the sampling tube 4 drives the guide ring 535 to move downward. At the same time, the sampling tube 4 pushes the power block 651 to drive the pressure plate 64 to move, and the pressure plate 64 presses the reinforcement rod 61 into the soil. The operator compares the scale lines on the guide ring 535 and the limit rod 531; when the sampling tube 4 moves to the predetermined position, turn off the motor 51, and control the motor 51 to drive the driving rod 52 to reverse. At this time, the sampling tube 4 moves upward, and the reset spring 653 and the support spring 62 resume deformation. When the sampling tube 4 returns to the initial position, the power block 651 and the reinforcement rod 61 also return to the initial position, and the motor 51 is turned off.

[0059] When the sampling tube 4 needs to be replaced, the operator pulls the limit rod 531 to separate the plug-in block 536 from the sampling tube 4, fixes the limit rod 531, and then rotates the sampling tube 4 to separate the sampling tube 4 from the driving rod 52. Then, a new sampling tube 4 is screwed onto the driving rod 52, and finally the limit rod 531 is loosened. The limit spring 534 restores its deformation and pushes the limit rod 531 to move until the plug-in block 536 cooperates with the plug-in hole 41.

[0060] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A sampling device for water conservancy and environmental geological survey, comprising a bottom plate (1) and a top plate (2), wherein the bottom plate (1) is connected to a support plate (3) fixed to the top plate (2), the top plate (2) is connected to a sampling tube (4), and a driving component (5) for driving the sampling tube (4) to move, the bottom plate (1) is provided with a through hole (11) for the sampling tube (4) to pass through, and is characterized in that: The bottom plate (1) is provided with cavities (12) at positions on both sides of the through hole (11), each cavity (12) is provided with a vertically placed reinforcement rod (61), the reinforcement rod (61) is connected to a support spring (62), the lower end of the support spring (62) is connected to the bottom wall of the cavity (12), and the bottom surface of the bottom plate (1) is provided with a hole for the reinforcement rod (61) to pass through; A guide rod (63) slidably plugged with the reinforcement rod (61) is connected to the top surface of the cavity (12); a pressure plate (64) slidably plugged with the guide rod (63) contacts the upper surface of the reinforcement rod (61); a side of the pressure plate (64) close to the through hole (11) is tilted downward; and a power member (65) supporting the pressure plate (64) and driving the pressure plate (64) to move along its length direction is also provided in the cavity (12); The power member (65) comprises a power block (651) slidably inserted into the cavity (12); one side of the power block (651) penetrates the cavity wall of the cavity (12) and extends into the through hole (11); the side wall of the power block (651) close to the through hole (11) is bent in a direction close to the through hole (11); and the pressure plate (64) is connected to the corresponding power block (651); A return spring (653) is connected to the power block (651), and the return spring (653) is connected to the cavity wall of the cavity (12). The return spring (653) limits the power block (651) so that the maximum distance between the two opposing power blocks (651) is greater than the outer diameter of the sampling tube (4), and the minimum distance between the two opposing power blocks (651) is less than the outer diameter of the sampling tube (4).

2. A sampling device for water conservancy and environmental geological survey according to claim 1, characterized in that: The power block (651) is connected to a sliding block (652), and a sliding groove (13) corresponding to the sliding block (652) is provided on the inner bottom wall of the cavity (12), and the sliding groove (13) and the pressure plate (64) have the same length direction, and the sliding block (652) is slidably inserted in the corresponding sliding groove (13).

3. A sampling device for water conservancy and environmental geological survey according to claim 1, characterized in that: The power block (651) is connected to a transverse plate (642), and the pressure plate (64) is fixed to an end of the transverse plate (642) away from the power block (651).

4. A sampling device for water conservancy and environmental geological survey according to any one of claims 1 to 3, characterized in that: The driving assembly (5) comprises a motor (51) fixedly connected to the top plate (2); the output shaft of the motor (51) is connected to a driving rod (52) located below the top plate (2); the sampling barrel (4) is sleeved outside the driving rod (52) and is threadedly connected to the driving rod (52); the bottom plate (1) is connected to a limiting rod (531) located on one side of the sampling barrel (4); the limiting rod (531) is sleeved with a guide ring (535); and the guide ring (535) is connected to the sampling barrel (4).

5. A sampling device for water conservancy and environmental geological survey according to claim 4, characterized in that: The guide ring (535) is detachably connected to the sampling tube (4).

6. A sampling device for water conservancy and environmental geological survey according to claim 5, characterized in that: The limiting rod (531) is slidably connected to the top plate (2) and the bottom plate (1), and the limiting rod (531) slides along the radial direction of the sampling tube (4); The guide ring (535) is connected to a plug-in block (536), and the sampling tube (4) is provided with a plug-in hole (41) adapted to the plug-in block (536); The limiting rod (531) is connected to a limiting spring (534), the limiting spring (534) is connected to the cavity wall of the cavity (12), and the limiting spring (534) enables the plug-in block (536) to be plugged into the plug-in hole (41).

7. A sampling device for water conservancy and environmental geological survey according to claim 6, characterized in that: The end of the limiting rod (531) is connected to a slider (532), and a slide groove (533) adapted to the slider (532) is provided on the bottom plate (1) and the top plate (2), and the length direction of the slide groove (533) is arranged along the radial direction of the sampling tube (4), and each slider (532) is slidably inserted in the corresponding slide groove (533).

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