A coring device for detecting a roadbed filled with construction waste and a coring method thereof

Abstract

The application relates to the technical field of roadbed detection, in particular to a core taking device for detecting building waste filled roadbed and a core taking method thereof, which comprises a bearing vehicle, a supporting table arranged on the bearing vehicle, a lifting assembly arranged on the supporting table, a supporting plate connected to the lifting assembly, a gas cylinder arranged on the supporting plate, a movable plate arranged at the telescopic end of the gas cylinder, a follow-up rotating mechanism arranged on the movable plate, a rotating sampling mechanism connected to the follow-up rotating mechanism and arranged on the movable plate, a sampler connected to the rotating sampling mechanism, and cutting teeth arranged at the end of the sampler. Through cooperation of the follow-up rotating mechanism and the rotating sampling mechanism, negative pressure is formed in the sampler when sampling of the sampler is completed, so that the sample cannot fall off the sampler during lifting of the sampler; when the sampler is lifted to a specified height, positive pressure is formed in the sampler, so that the sample is pushed out of the sampler.

Description

Technical Field

[0001] This invention relates to the field of roadbed testing technology, specifically a core sampling device and method for testing roadbeds filled with construction waste. Background Technology

[0002] With the acceleration of urbanization, the amount of construction waste generated is increasing day by day. Crushing and processing it and using it as roadbed filling material is one of the effective ways to realize resource utilization.

[0003] Due to the complex composition and uneven particle size of construction waste, the compacted roadbed may vary in terms of uniformity, density, and bearing capacity. In order to scientifically evaluate the construction quality and actual performance of roadbeds filled with construction waste, it is necessary to obtain complete columnar core samples through on-site core sampling and to conduct laboratory analysis of key indicators such as density, strength, and compaction.

[0004] Currently, coring and testing of roadbeds filled with construction waste mainly relies on traditional engineering drilling rigs or hydraulic coring equipment. These devices typically use diamond drill bits or coring cylinders to cut into the roadbed under the dual action of rotation and downward pressure to complete the coring.

[0005] However, construction waste fillers contain irregular, hard materials such as bricks and concrete blocks, and the materials have poor adhesion. During drilling, the core sample is prone to breakage, damage, or interlayer detachment due to vibration, friction, or resistance when separating from the parent material. It is difficult to obtain a complete and representative sample. Furthermore, when removing the sample, the core sample often gets stuck inside due to friction with the inner wall of the core tube, making it difficult to remove smoothly and completely. Operators usually need to manually tap it with tools or use a push rod to force it out. This process can easily cause secondary damage to the fragile core sample, affecting the accuracy of the test results. Summary of the Invention

[0006] The purpose of this invention is to provide a coring device and a coring method for detecting roadbeds filled with construction waste, so as to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] A core sampling device for detecting roadbeds filled with construction waste includes:

[0009] A carrier vehicle, and a support platform mounted on the carrier vehicle, with a lifting assembly on the support platform and a support plate connected to the lifting assembly;

[0010] Also includes:

[0011] A cylinder is mounted on the support plate, and a movable plate is provided at the telescopic end of the cylinder;

[0012] A follow-up rotation mechanism is provided on the movable plate, and a rotation sampling mechanism connected to the follow-up rotation mechanism is also provided on the movable plate. A sampler is connected to the rotation sampling mechanism, and a cutting tooth is provided at the end of the sampler.

[0013] When the follower rotating mechanism moves, the pressure inside the sampler is adjusted by the rotating sampling mechanism to perform adsorption and ejection actions on the sample inside the sampler.

[0014] As a further aspect of the present invention: the follower rotation mechanism includes a fixed rod disposed on the support plate, the end of the fixed rod is provided with a fixed ring, and the inner wall of the fixed ring is formed with a plurality of guide grooves distributed circumferentially.

[0015] As a further embodiment of the present invention: a rotating sleeve is rotatably mounted on the side of the movable plate away from the support plate, a first limiting post is provided at the end of the rotating sleeve to slide and engage with the guide groove, and a spiral groove is formed on the outer circumferential wall of the rotating sleeve.

[0016] As a further embodiment of the present invention: the guide groove includes a first vertical groove, a first inclined groove, a second vertical groove, and a second inclined groove, with the first vertical groove, the first inclined groove, the second vertical groove, and the second inclined groove connected end to end in sequence.

[0017] As a further embodiment of the present invention: the rotary sampling mechanism includes a second motor disposed on the movable plate, a rotating rod rotatably mounted on the movable plate and connected to the output shaft of the second motor, and the rotating rod being fixedly connected to the sampler;

[0018] It also includes a sliding assembly and a guide assembly disposed on the movable plate for adjusting the pressure inside the sampler.

[0019] As a further embodiment of the present invention: the sliding assembly includes a groove formed on the outer circumference of the rotating rod, a movable rod that slides axially through the sampler inside the rotating rod, a movable sleeve that is slidably mounted on the rotating rod, and a limiting block that is slidably connected to the groove and fixedly connected to the movable rod on the movable sleeve.

[0020] As a further embodiment of the present invention: the guide assembly includes a guide post disposed on the movable plate, the guide post having a connecting plate rotatably connected to the movable sleeve along its axial direction, and the connecting plate having a second limiting post slidably engaged with the spiral groove.

[0021] As a further embodiment of the present invention: the end of the movable rod is provided with a piston disc that is slidably and sealingly connected to the sampler.

[0022] As a further embodiment of the present invention: the lifting assembly includes a first motor and a guide rail disposed on the support platform, a lead screw connected to the output shaft of the first motor is rotatably mounted on the support platform, a threaded sleeve is threadedly connected to the lead screw, and the support plate is fixedly connected to the threaded sleeve and slidably connected to the guide rail.

[0023] A core sampling method for detecting roadbeds filled with construction waste includes the following steps:

[0024] Step 1: Move the vehicle to the desired sampling location using the vehicle control device;

[0025] Step 2: The lifting assembly operates and drives the support plate to move towards the ground, thereby moving the sampler.

[0026] Step 3: When the sampler comes into contact with the ground, the rotating sampling mechanism works and drives the sampler and cutting teeth to rotate. At the same time, the cylinder controls the movable plate to move towards the ground, and the sampler will cut the ground to collect samples through the cutting teeth.

[0027] Step 4: After the cutting is completed, under the action of the follow-up rotating mechanism, the negative pressure is formed in the sampling tube by the rotating sampling mechanism, so that the sample in the sampling tube moves towards the initial position along with the sampling tube.

[0028] Step 5: When the sampling tube is raised to the specified height, the follow-up rotating mechanism controls the formation of positive pressure inside the sampling tube through the rotating sampling mechanism, so as to push the sample out of the sampling tube.

[0029] Compared with the prior art, the beneficial effects of the present invention are:

[0030] This invention, through the cooperation of a rotating sampling mechanism and a follow-up rotating mechanism, can adjust the pressure inside the sampling tube to assist in sample extraction. When the sampling tube extends into the foundation to a specified depth, the piston disc moves, creating a negative pressure in the pressure regulating chamber. This negative pressure acts on the end of the core sample, providing a uniform and continuous adsorption force, effectively counteracting separation resistance and preventing the core sample from breaking or falling off due to its own weight or stress concentration. At the same time, by controlling the sampler to rotate in small amplitudes, alternating shear stress is applied to the root of the core sample, assisting in its smooth separation. This greatly improves the core sample integrity rate in loose and heterogeneous fillers such as construction waste.

[0031] After the sampling tube lifts the sample to the designated height, during the reset process, the follow-up rotating mechanism drives the piston disk to move in the opposite direction again through the rotating sampling mechanism to form a positive pressure in the pressure regulating chamber. This positive pressure generates a smooth and uniform pushing force on the core sample, causing it to be completely and smoothly pushed out of the sampler and fall into the collection tube. Attached Figure Description

[0032] Figure 1 A schematic diagram of one embodiment of a core sampling device for detecting roadbeds filled with construction waste.

[0033] Figure 2 A schematic diagram of the structure of a core sampling device for detecting roadbed filling with construction waste from another angle in one embodiment.

[0034] Figure 3 A schematic diagram illustrating the connection relationship between the support plate, movable plate, sampler, part of the follow-up rotating mechanism, and part of the rotating sampling mechanism in one embodiment of a core sampling device for detecting roadbed filled with construction waste.

[0035] Figure 4 A schematic diagram of the structure of a core sampling device for detecting roadbed filled with construction waste in one embodiment, comprising a partial follow-up rotating mechanism, a partial rotating sampling mechanism, and a sampler.

[0036] Figure 5 for Figure 4 A magnified schematic diagram of the structure at point A in the middle.

[0037] Figure 6 A schematic diagram of the structure of a partial rotating sampling mechanism and sampler in one embodiment of a core sampling device for detecting roadbed filled with construction waste.

[0038] Figure 7 A schematic diagram of the structure of a core sampling device for detecting roadbed filled with construction waste in one embodiment, comprising a partial follow-up rotating mechanism and a partial rotating sampling mechanism.

[0039] Figure 8 An exploded view of part of the rotating sampling mechanism in one embodiment of a coring device for detecting construction waste filling in roadbeds.

[0040] Figure 9 An exploded view of part of the follower rotation mechanism in one embodiment of a core sampling device for detecting roadbed filled with construction waste.

[0041] Figure 10 A schematic diagram of the structure of the fixed ring and the elastic sealing ring in one embodiment of the core sampling device for detecting roadbed filled with construction waste.

[0042] In the diagram: 1. Carrier vehicle; 2. Support platform; 201. Guide rail; 3. First motor; 4. Lead screw; 5. Threaded sleeve; 6. Support plate; 7. Cylinder; 8. Movable plate; 9. Second motor; 10. Rotating rod; 1001. Slide groove; 11. Fixed rod; 12. Fixed ring; 1201. First vertical groove; 1202. First inclined groove; 1203. Second vertical groove; 1204. Second inclined groove; 13. Rotating sleeve; 1301. Spiral groove; 14. First limiting post; 15. Movable rod; 1501. Limiting block; 16. Piston disc; 17. Movable sleeve; 18. Connecting plate; 19. Guide post; 20. Second limiting post; 21. Sampler; 2101. Cutting tooth; 22. Elastic sealing ring. Detailed Implementation

[0043] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0044] Furthermore, elements in this invention are referred to as being "fixed to" or "set on" another element, which may be directly on the other element or may also include an intervening element. When an element is considered to be "connected" to another element, it may be directly connected to the other element or may also include an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementations.

[0045] Please see Figures 1-10 In this embodiment of the invention, a core sampling device for detecting roadbeds filled with construction waste includes:

[0046] The carrier vehicle 1 and the support platform 2 set on the carrier vehicle 1, the support platform 2 is equipped with a lifting component, and the lifting component is connected to a support plate 6;

[0047] Also includes:

[0048] Cylinder 7 is mounted on the support plate 6, and the telescopic end of cylinder 7 is provided with a movable plate 8;

[0049] A follow-up rotation mechanism is provided on the movable plate 8. The movable plate 8 is also provided with a rotation sampling mechanism connected to the follow-up rotation mechanism. A sampler 21 is connected to the rotation sampling mechanism. A cutting tooth 2101 is provided at the end of the sampler 21.

[0050] When the follow-up rotating mechanism moves, the pressure inside the sampler 21 is adjusted by the rotating sampling mechanism to perform adsorption and ejection actions on the sample inside the sampler 21.

[0051] Specifically, when sampling and testing roadbeds filled with construction waste, to ensure the completeness of the sampling, after the roadbed is cut, the auxiliary sample needs to move synchronously with the sampler 21. To this end, the lifting assembly controls the movement of the sampler 21 until the cutting teeth 2101 are in contact with the roadbed. At this point, the lifting assembly stops moving, the cylinder 7 operates, and controls the movable plate 8 to move away from the support plate 6. This allows the sampler 21 to control the cutting teeth 2101 to apply downward pressure to the foundation. Simultaneously, the rotating sampling mechanism operates, driving the sampler 21 and the cutting teeth 2101 to rotate. Under the action of the cutting teeth 2101, the foundation is cut and the sampler 21 gradually extends into the foundation. When the sampler 21 reaches the specified depth, the sampling is completed. Under the action of the follow-up rotation mechanism, the negative pressure is formed in the sampler 21 by the rotation sampling mechanism to provide a certain adsorption force to the sample in the sampler 21. At this time, the lifting mechanism controls the sampler 21 to detach from the foundation. When the sampler 21 is raised to the specified height, the follow-up rotation mechanism controls the positive pressure to be formed in the sampler 21 by the rotation sampling mechanism to provide the sample with a pushing force, thereby assisting the sample to detach from the sampler 21.

[0052] Please see Figure 1 , Figure 2 The lifting assembly includes a first motor 3 and a guide rail 201 mounted on the support platform 2. A lead screw 4 connected to the output shaft of the first motor 3 is rotatably mounted on the support platform 2. A threaded sleeve 5 is threadedly connected to the lead screw 4. The support plate 6 is fixedly connected to the threaded sleeve 5 and slidably connected to the guide rail 201.

[0053] In detail, in the initial state, under the action of the lead screw 4, the support plate 6 is located at the end of its stroke away from the bearing vehicle 1. When it is necessary to sample the foundation, the first motor 3 works and drives the lead screw 4 to rotate, thereby driving the threaded sleeve 5 to move. Under the action of the threaded sleeve 5, the support plate 6 slides radially along the guide rail 201. The guide rail 201 has a guiding function, which can ensure that the threaded sleeve 5 slides axially along the lead screw 4 and does not rotate with the lead screw 4. When the support plate 6 moves to the designated position, the first motor 3 stops rotating. After the sampling is completed, the first motor 3 controls the lead screw 4 to reverse, so as to control the support plate 6 to rise towards the initial height until the support plate 6 is reset.

[0054] Please see Figures 1-5 , Figure 7 , Figure 9 , Figure 10The follower rotation mechanism includes a fixed rod 11 disposed on the support plate 6. A fixed ring 12 is disposed at the end of the fixed rod 11. A plurality of guide grooves are formed on the inner wall of the fixed ring 12 in a circumferentially equidistant manner. A rotating sleeve 13 is rotatably mounted on the side of the movable plate 8 away from the support plate 6. A first limiting post 14 is disposed at the end of the rotating sleeve 13 and slides into the guide groove. A spiral groove 1301 is formed on the outer circumferential wall of the rotating sleeve 13. The guide groove includes a first vertical groove 1201, a first inclined groove 1202, a second vertical groove 1203, and a second inclined groove 1204. The first vertical groove 1201, the first inclined groove 1202, the second vertical groove 1203, and the second inclined groove 1204 are connected end to end in sequence.

[0055] Please see Figures 1-8 The rotary sampling mechanism includes a second motor 9 mounted on the movable plate 8, a rotating rod 10 rotatably mounted on the movable plate 8 and connected to the output shaft of the second motor 9, and the rotating rod 10 fixedly connected to the sampler 21; it also includes a sliding assembly and a guiding assembly mounted on the movable plate 8 for adjusting the internal pressure of the sampler 21, the sliding assembly including a groove 1001 formed on the outer circumference of the rotating rod 10, and a movable rod 15 axially sliding through the sampler 21 within the rotating rod 10. A movable sleeve 17 is slidably installed on the upper part of the movable sleeve 17. A limiting block 1501 is provided on the movable sleeve 17, which is slidably connected to the slide groove 1001 and fixedly connected to the movable rod 15. The guide assembly includes a guide post 19 provided on the movable plate 8. A connecting plate 18 is slidably connected to the movable sleeve 17 along the axial direction of the guide post 19. A second limiting post 20 is provided on the connecting plate 18, which is slidably fitted into the spiral groove 1301. A piston disc 16 is provided at the end of the movable rod 15, which is slidably and sealingly connected to the sampler 21.

[0056] Furthermore, the piston disc 16 is slidably sealed to the sampler 21. Therefore, the piston disc 16 divides the sampler 21 into two chambers. The chamber located on the side of the piston disc 16 facing the support plate 6 is the clearance chamber and is connected to the outside. The chamber located on the side of the piston disc 16 facing the cutting tooth 2101 is the pressure regulating chamber and is also connected to the outside when the sampler 21 is not taking a sample.

[0057] Please see Figure 7 In the initial state, under the action of cylinder 7, the distance between movable plate 8 and support plate 6 is minimized. At this time, the distance between movable plate 8 and fixed ring 12 is maximized. In this state, the first limiting post 14 is located at the connection position of the first vertical groove 1201 and the second inclined groove 1204.

[0058] Please see Figure 6 , Figure 7 The second limiting post 20 is located at the end of the stroke of the spiral groove 1301 on the side away from the movable plate 8. In this case, the distance between the connecting plate 18 and the movable sleeve 17 and the movable plate 8 is the largest, so that the limiting block 1501 is located at the end of the stroke of the slide groove 1001 on the side away from the movable plate 8. The movable sleeve 17 will control the piston disc 16 to be located at the end of the stroke in the direction close to the cutting tooth 2101 through the limiting block 1501 and the movable rod 15, that is, the size of the displacement chamber is in the maximum state and the size of the pressure regulating chamber is in the minimum state.

[0059] When it is necessary to sample the foundation, under the action of the lifting assembly, the sampler 21 is first controlled to move towards the foundation until the cutting teeth 2101 come into contact with the foundation. At this time, the lifting assembly stops moving. At this time, the cylinder 7 works and pushes the movable plate 8 to move away from the support plate 6, so that the cutting teeth 2101 have a certain downward pressure on the ground. At the same time, the second motor 9 works and drives the rotating rod 10 to rotate, thereby driving the cutting teeth 2101 to rotate through the sampler 21. Under the dual action of the rotating cutting force and downward pressure of the cutting teeth 2101, the foundation is cut and the sampler 21 gradually enters the foundation.

[0060] During this process, the movable plate 8 will also drive the rotating sleeve 13 to move, so that the first limiting post 14 slides along the first vertical groove 1201. Under the action of the first limiting post 14 and the first vertical groove 1201, the angle of the rotating sleeve 13 is locked, so that the movable sleeve 17 and the connecting plate 18 are locked in the axial position of the rotating rod 10 by the second limiting post 20 and the spiral groove 1301, thereby ensuring that the position of the piston disc 16 in the sampler 21 will not change by the movable rod 15.

[0061] Please see Figure 10 The sampler 21 is also equipped with an open elastic sealing ring 22 located between the piston disc 16 and the cutting teeth 2101. The distance between the elastic sealing ring 22 and the cutting teeth 2101 is the required sampling thickness. Under the cutting action of the cutting teeth 2101, a small gap will appear at the edge of the sample entering the sampler 21, and the position of the piston disc 16 will not change. Therefore, the air in the pressure regulating chamber will overflow through the small gap, ensuring that the pressure in the pressure regulating chamber remains constant.

[0062] When the first limiting post 14 disengages from the first vertical groove 1201 and enters the first inclined groove 1202, the sample in the sampler 21 moves to the position where it contacts the elastic sealing ring 22. Under the action of the first limiting post 14 and the first inclined groove 1202, the rotating sleeve 13 rotates. The rotating sleeve 13 will drive the spiral groove 1301 to move. Under the action of the spiral groove 1301 and the second limiting post 20, the connecting plate 18 slides along the axial direction of the guide post 19 and moves towards the direction close to the movable plate 8. Plate 18 also drives the movable sleeve 17 to move, thereby controlling the movement of the movable rod 15 through the limit block 1501, so that the piston disc 16 moves toward the movable plate 8. During this process, the elastic sealing ring 22 can fit with the end of the sample and deform to seal the gap between the sample edge and the sampler 21. The piston disc 16 will control the size of the clearance chamber to gradually decrease and the size of the pressure regulating chamber to gradually increase, so that a negative pressure is formed in the pressure regulating chamber. Under the action of negative pressure, a certain adsorption force is provided to the sample.

[0063] When the first limiting post 14 moves to the position where the first inclined groove 1202 and the second vertical groove 1203 are connected, it indicates that the sampling is completed. Since the slope of the first inclined groove 1202 and the second inclined groove 1204 is small, the sampler 21 extends into the foundation in a small size during the rotation of the rotating sleeve 13, thereby ensuring that the deformation of the elastic sealing ring 22 is not too large, so as to ensure that the elastic sealing ring 22 can provide an effective sealing effect.

[0064] At this time, the second motor 9 can control the sampler 21 to perform a small-amplitude reciprocating rotation through the rotating rod 10. Under the combined action of the continuous adsorption force provided by the negative pressure and the reciprocating torque of the cutting teeth 2101, the root of the sample is subjected to alternating shear stress, thereby controlling the separation of the sample in the sampler 21 from the foundation soil layer and completing the root cutting.

[0065] Subsequently, the lifting assembly operates, controlling the support plate 6 to rise and causing the sampler 21 to detach from the foundation. Under negative pressure, the sample inside the sampler 21 can be synchronously removed from the foundation. When the sampler 21 is raised to the specified height, a collection tube can be placed below the sampler 21. At the same time, the cylinder 7 controls the movable plate 8 to reset towards the support plate 6. During the reset process of the movable plate 8, the first limiting post 14 enters the second inclined groove 1204 through the second vertical groove 1203 and drives the rotating sleeve 13 to rotate again.

[0066] Rotating sleeve 13 drives spiral groove 1301 to move, and under the action of second limiting post 20, drives connecting plate 18 and movable sleeve 17 to move away from movable plate 8. Movable sleeve 17 pushes movable rod 15 and piston disc 16 to slide in the sampler 21 towards cutting tooth 2101 through limiting block 1501. The movement of piston disc 16 reduces the volume of pressure regulating chamber and increases internal pressure, forming positive pressure. This positive pressure applies a uniform and continuous pushing force to the sample, enabling the sample to overcome the initial friction with the inner wall of sampler 21, assisting it to slide smoothly out of sampler 21 and fall into collection tube for subsequent soil sample testing.

[0067] A core sampling method for detecting roadbeds filled with construction waste includes the following steps:

[0068] Step 1: Move the vehicle to the desired sampling location using the control device of the carrier vehicle 1;

[0069] Step 2: The lifting assembly operates and drives the support plate 6 to move towards the ground, thereby moving the sampler 21.

[0070] Step 3: When the sampler 21 comes into contact with the ground, the rotating sampling mechanism works and drives the sampler 21 and the cutting teeth 2101 to rotate. At the same time, the cylinder 7 controls the movable plate 8 to move towards the ground, and the sampler 21 will cut and sample the ground through the cutting teeth 2101.

[0071] Step 4: After the cutting is completed, under the action of the follow-up rotating mechanism, the negative pressure is formed in the sampling tube 21 by the rotating sampling mechanism, so that the sample in the sampling tube 21 moves towards the initial position along with the sampling tube 21.

[0072] Step 5: When the sampling tube 21 is raised to the specified height, the follow-up rotating mechanism controls the formation of positive pressure inside the sampling tube 21 through the rotating sampling mechanism, so as to push the sample out of the sampling tube 21.

[0073] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0074] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A core sampling device for detecting roadbeds filled with construction waste, comprising: A carrier vehicle, and a support platform mounted on the carrier vehicle, with a lifting assembly on the support platform and a support plate connected to the lifting assembly; Its characteristic is that it further includes: A cylinder is mounted on the support plate, and a movable plate is provided at the telescopic end of the cylinder; A follow-up rotation mechanism is provided on the movable plate, and a rotation sampling mechanism connected to the follow-up rotation mechanism is also provided on the movable plate. A sampler is connected to the rotation sampling mechanism, and a cutting tooth is provided at the end of the sampler. When the follower rotating mechanism moves, the pressure inside the sampler is adjusted by the rotating sampling mechanism to perform adsorption and ejection actions on the sample inside the sampler.

2. The core sampling device for detecting roadbed filled with construction waste according to claim 1, characterized in that, The follow-up rotation mechanism includes a fixed rod disposed on the support plate, and a fixed ring is disposed at the end of the fixed rod. The inner wall of the fixed ring is formed with a plurality of guide grooves distributed circumferentially.

3. The core sampling device for detecting roadbed filled with construction waste according to claim 2, characterized in that, A rotating sleeve is rotatably mounted on the side of the movable plate away from the support plate. A first limiting post is provided at the end of the rotating sleeve to slide into the guide groove. A spiral groove is formed on the outer circumference of the rotating sleeve.

4. The core sampling device for detecting roadbed filled with construction waste according to claim 2, characterized in that, The guide groove includes a first vertical groove, a first inclined groove, a second vertical groove, and a second inclined groove, with the first vertical groove, the first inclined groove, the second vertical groove, and the second inclined groove connected end to end in sequence.

5. A core sampling device for detecting roadbed filled with construction waste according to claim 3, characterized in that, The rotary sampling mechanism includes a second motor mounted on the movable plate, a rotating rod rotatably mounted on the movable plate and connected to the output shaft of the second motor, and the rotating rod is fixedly connected to the sampler; It also includes a sliding assembly and a guide assembly disposed on the movable plate for adjusting the pressure inside the sampler.

6. The core sampling device for detecting roadbed filled with construction waste according to claim 5, characterized in that, The sliding assembly includes a groove formed on the outer circumference of the rotating rod, a movable rod that slides axially through the sampler inside the rotating rod, a movable sleeve that is slidably mounted on the rotating rod, and a limiting block that is slidably connected to the groove and fixedly connected to the movable rod on the movable sleeve.

7. A core sampling device for detecting roadbed filled with construction waste according to claim 6, characterized in that, The guiding assembly includes a guide post disposed on the movable plate, the guide post having an axially sliding connecting plate rotatably connected to the movable sleeve, and the connecting plate having a second limiting post slidably engaged with the spiral groove.

8. A core sampling device for detecting roadbed filled with construction waste according to claim 6, characterized in that, The end of the movable rod is provided with a piston disc that is slidably and sealingly connected to the sampler.

9. A core sampling device for detecting roadbed filled with construction waste according to claim 1, characterized in that, The lifting assembly includes a first motor and a guide rail mounted on the support platform. A lead screw connected to the output shaft of the first motor is rotatably mounted on the support platform. A threaded sleeve is threadedly connected to the lead screw. The support plate is fixedly connected to the threaded sleeve and slidably connected to the guide rail.

10. A core sampling method for detecting roadbeds filled with construction waste, comprising using the core sampling device for detecting roadbeds filled with construction waste as described in any one of claims 1-9, characterized in that, Includes the following steps: Step 1: Move the vehicle to the desired sampling location using the vehicle control device; Step 2: The lifting assembly operates and drives the support plate to move towards the ground, thereby moving the sampler. Step 3: When the sampler comes into contact with the ground, the rotating sampling mechanism works and drives the sampler and cutting teeth to rotate. At the same time, the cylinder controls the movable plate to move towards the ground, and the sampler will cut the ground to collect samples through the cutting teeth. Step 4: After the cutting is completed, under the action of the follow-up rotating mechanism, the negative pressure is formed in the sampling tube by the rotating sampling mechanism, so that the sample in the sampling tube moves towards the initial position along with the sampling tube. Step 5: When the sampling tube is raised to the specified height, the follow-up rotating mechanism controls the formation of positive pressure inside the sampling tube through the rotating sampling mechanism, so as to push the sample out of the sampling tube.

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