Punching and sampling device for road and bridge detection

Abstract

The utility model relates to the technical field of road and bridge punching and sampling, and discloses a punching and sampling device for road and bridge detection, which comprises a support bottom plate, universal wheels, a sampling driving hydraulic cylinder, a sampling punching pipe and a sampling hydraulic rod, the bottom surface of the support bottom plate is fixedly connected with the universal wheels, the top surface of the support bottom plate is fixedly connected with a sampling support frame, and the sampling support frame is fixedly connected with the sampling driving hydraulic cylinder. A sampling driving hydraulic cylinder is fixedly connected to the bottom surface of the top of the sampling supporting frame, a sampling hydraulic rod is slidably connected to the inner side of the sampling driving hydraulic cylinder, a sampling punching pipe is fixedly connected to the bottom surface of the sampling hydraulic rod, and a sampling punching pipe is slidably connected to the inner side of the supporting bottom plate; the plane adjusting and supporting assembly is arranged on the top surface of the supporting bottom plate; the sliding guide assembly is arranged on the top surface of the supporting bottom plate; according to the device, through plane adjustment, sliding guide and the self-locking cleaning assembly, manpower is saved, deviation is prevented, cleaning is easy, and sampling accuracy is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of road and bridge drilling and sampling technology, specifically a drilling and sampling device for road and bridge inspection. Background Technology

[0002] In the construction and inspection of highway bridges and tunnels, the compaction degree testing of the subgrade soil is a crucial step in ensuring project quality. This process often requires obtaining soil samples through drilling and sampling mechanisms. However, currently available drilling and sampling mechanisms face numerous problems in practical operation that urgently need to be addressed.

[0003] On the one hand, existing devices mostly rely on manual support of the drive motor for drilling operations. As the drilling depth increases, operators need to constantly bend over to adjust the verticality of the motor to avoid drilling deviation affecting sampling accuracy. This manual operation method not only significantly increases the labor intensity of construction workers and consumes a lot of labor costs, but also greatly reduces drilling efficiency due to the difficulty in maintaining a stable operating posture during manual adjustment, seriously restricting the overall progress of the testing work. On the other hand, after sampling, for some soils with high moisture content, the soil is prone to solidify and adhere firmly to the surface of the sampling rod. This not only brings great difficulties to the subsequent cleaning work, requiring additional time and effort to handle, but more importantly, when sampling again, this residual soil will fall off with the newly obtained sample, causing the sample to be mixed with the residual soil from the previous sampling, which in turn leads to deviations in the sampling values ​​during the testing process, affecting the accurate judgment of the roadbed compaction degree and bringing potential risks to the project quality assessment. To address these issues, we propose a drilling and sampling device for road and bridge testing. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a drilling and sampling device for road and bridge inspection, which solves the aforementioned problems.

[0005] To achieve the above-mentioned objectives, this utility model provides the following technical solution:

[0006] A drilling and sampling device for road and bridge inspection, comprising:

[0007] The system includes a support base plate, casters, a sampling drive hydraulic cylinder, a sampling perforation tube, and a sampling hydraulic rod. The casters are fixedly connected to the bottom surface of the support base plate in a rectangular, equidistant arrangement. A sampling support frame is fixedly connected to the top surface of the support base plate. A sampling drive hydraulic cylinder is fixedly connected to the top and bottom surfaces of the sampling support frame. A sampling hydraulic rod is slidably connected to the inner side of the sampling drive hydraulic cylinder. A sampling perforation tube is fixedly connected to the bottom surface of the sampling hydraulic rod. A sampling perforation tube is slidably connected to the inner side of the support base plate.

[0008] A planar adjustment support assembly is provided on the top surface of the support base plate. The top surface of the support base plate is fixedly connected to a support adjustment hydraulic cylinder. The support adjustment hydraulic cylinders are distributed in a rectangular equidistant manner on the top surface of the support base plate. The planar adjustment support assembly is provided at the bottom of the support adjustment hydraulic cylinders.

[0009] A sliding guide assembly is provided on the top surface of a support base plate. A guide slide rod is fixedly connected to the top surface of the support base plate. The guide slide rod is distributed in a rectangular equidistant manner on the top surface of the support base plate. A sliding guide assembly is provided on the outer side of the guide slide rod.

[0010] A sampling self-locking cleaning component is installed inside the sampling perforation tube, which is used to remove and clean the soil adhering to the inside of the sampling perforation tube.

[0011] Preferably, the planar adjustment support assembly includes a support adjustment hydraulic cylinder, a buffer support pad, and a support hydraulic rod. The support adjustment hydraulic cylinder is fixedly connected to the top surface of the support base plate, and the support hydraulic rod is slidably connected to the inner side of the support adjustment hydraulic cylinder. The top surface of the support base plate has support sliding holes that are equidistantly distributed in a rectangular shape. The support hydraulic rod is slidably connected to the inner side of the support sliding holes, and the buffer support pad is fixedly connected to the bottom surface of the support hydraulic rod.

[0012] Preferably, the sliding guide assembly includes a guide slide rod and a sampling perforated tube. The top surface of the sampling perforated tube is provided with a sliding guide hole. The sliding guide holes are distributed in a rectangular and equidistant manner on the top surface of the sampling perforated tube. The guide slide rod is slidably connected to the inner side of the sliding guide hole.

[0013] Preferably, the sampling self-locking cleaning component includes a sampling cleaning component and a self-locking component. A self-locking support boss is fixedly connected to the side of the sampling perforated tube. The sampling cleaning component is hollow inside the sampling perforated tube, and the self-locking component is located inside the self-locking support boss.

[0014] Preferably, the sampling and cleaning assembly includes a cleaning scraper and a return spring. The return spring is fixedly connected to the inner top surface of the sampling perforated tube, and the cleaning scraper is fixedly connected to the bottom surface of the return spring. The cleaning scraper is slidably connected to the inner side of the sampling perforated tube. A self-locking groove is provided on the side of the cleaning scraper. A limit protection boss is fixedly connected to the inner side of the sampling perforated tube, and the cleaning scraper is slidably connected to the bottom surface of the limit protection boss.

[0015] Preferably, the self-locking assembly includes a support plate, a sliding self-locking rod, and a self-locking spring. The support plate is fixedly connected to the side of the self-locking support boss, the self-locking spring is fixedly connected to the inside of the support plate, the sliding self-locking rod is fixedly connected to the other side of the self-locking spring, the self-locking spring is slidably connected to the inside of the self-locking support boss, the sliding self-locking rod is slidably connected to the inside of the self-locking support boss, the sliding self-locking rod is slidably connected to the inside of the support plate, and the sliding self-locking rod is slidably connected to the inside of the self-locking groove.

[0016] Compared with the prior art, the advantages of this utility model are:

[0017] A drilling and sampling device for road and bridge inspection is provided, which has the following advantages:

[0018] This invention utilizes a planar adjustment support assembly. A hydraulic cylinder drives the support hydraulic rod to extend and retract, and a buffer support pad stabilizes the support device and adjusts the plane, ensuring the sampling perforation tube is perpendicular to the bottom surface. This eliminates the need for manual support and adjustment, reducing labor costs and improving perforation stability. In the sliding guide assembly, the guide rod cooperates with the sliding guide hole of the sampling perforation tube, providing precise guidance for the tube's vertical movement, preventing perforation deviation, and improving sampling accuracy and efficiency. The sampling self-locking cleaning assembly effectively solves the problem of soil adhesion. During sampling, the cleaning scraper is pushed by the soil, compressing the return spring. The sliding self-locking rod of the self-locking assembly engages with the self-locking groove to lock. After sampling, pulling the sliding self-locking rod releases the lock, and the return spring causes the cleaning scraper to slide down, scraping away the soil adhering to the inner wall of the sampling perforation tube. This reduces cleaning difficulty, prevents residual soil from affecting the accuracy of subsequent sampling, and ensures the accuracy of the test data. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a schematic diagram showing the overall structure of this utility model disassembled;

[0021] Figure 3 This is a cross-sectional view of the overall structure of this utility model;

[0022] Figure 4 for Figure 3 A magnified view of part A in the diagram.

[0023] In the diagram: 1. Support base plate; 2. Casters; 3. Sampling support frame; 4. Sampling drive hydraulic cylinder; 5. Support adjustment hydraulic cylinder; 6. Buffer support pad; 7. Guide slide rod; 8. Sampling perforated tube; 9. Support sealing plate; 10. Sliding self-locking rod; 11. Self-locking support boss; 12. Support sliding hole; 13. Cleaning scraper; 14. Self-locking slide groove; 15. Support hydraulic rod; 16. Self-locking spring; 17. Return spring; 18. Sampling hydraulic rod; 19. Limit protection boss. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figure 1-4 This utility model provides a technical solution:

[0026] A drilling and sampling device for road and bridge inspection, comprising:

[0027] The system includes a support base plate 1, casters 2, a sampling drive hydraulic cylinder 4, a sampling perforation tube 8, and a sampling hydraulic rod 18. The casters 2 are fixedly connected to the bottom surface of the support base plate 1 and are distributed in a rectangular, equidistant pattern on the bottom surface of the support base plate 1. A sampling support frame 3 is fixedly connected to the top surface of the support base plate 1. A sampling drive hydraulic cylinder 4 is fixedly connected to the top and bottom surfaces of the sampling support frame 3. A sampling hydraulic rod 18 is slidably connected to the inner side of the sampling drive hydraulic cylinder 4. A sampling perforation tube 8 is fixedly connected to the bottom surface of the sampling hydraulic rod 18 and is slidably connected to the inner side of the support base plate 1.

[0028] A planar adjustment support assembly is provided on the top surface of the support base plate 1. A support adjustment hydraulic cylinder 5 is fixedly connected to the top surface of the support base plate 1. The support adjustment hydraulic cylinders 5 are distributed in a rectangular equidistant manner on the top surface of the support base plate 1. A planar adjustment support assembly is provided at the bottom of the support adjustment hydraulic cylinders 5.

[0029] A sliding guide assembly is provided on the top surface of the support base plate 1. A guide slide rod 7 is fixedly connected to the top surface of the support base plate 1. The guide slide rods 7 are distributed in a rectangular equidistant manner on the top surface of the support base plate 1. A sliding guide assembly is provided on the outer side of the guide slide rod 7.

[0030] A sampling self-locking cleaning component is installed inside the sampling perforation tube 8. The sampling self-locking cleaning component is used to remove and clean the soil adhering to the inside of the sampling perforation tube 8.

[0031] Furthermore, the planar adjustment support assembly includes a support adjustment hydraulic cylinder 5, a buffer support pad 6, and a support hydraulic rod 15. The support adjustment hydraulic cylinder 5 is fixedly connected to the top surface of the support base plate 1, and the support hydraulic rod 15 is slidably connected to the inner side of the support adjustment hydraulic cylinder 5. The top surface of the support base plate 1 has support sliding holes 12 that are distributed in a rectangular shape at equal intervals. The support hydraulic rod 15 is slidably connected to the inner side of the support sliding holes 12, and the buffer support pad 6 is fixedly connected to the bottom surface of the support hydraulic rod 15. Through the action of the planar adjustment support assembly, the support adjustment of the plane is realized, so that the sampling and drilling tube 8 remains perpendicular to the bottom surface.

[0032] Furthermore, the sliding guide assembly includes a guide slide rod 7 and a sampling perforated tube 8. The top surface of the sampling perforated tube 8 is provided with sliding guide holes, which are distributed in a rectangular and equidistant manner on the top surface of the sampling perforated tube 8. The guide slide rod 7 is slidably connected to the inner side of the sliding guide holes. Through the action of the sliding guide assembly, the sampling perforated tube 8 is guided and slid.

[0033] Furthermore, the sampling self-locking cleaning component includes a sampling cleaning component and a self-locking component. A self-locking support boss 11 is fixedly connected to the side of the sampling perforated tube 8. The sampling cleaning component is hollow inside the sampling perforated tube 8, and the self-locking component is located inside the self-locking support boss 11.

[0034] Furthermore, the sampling and cleaning assembly includes a cleaning scraper 13 and a return spring 17. The return spring 17 is fixedly connected to the top inner surface of the sampling perforated tube 8, and the cleaning scraper 13 is fixedly connected to the bottom surface of the return spring 17. The cleaning scraper 13 is slidably connected to the inner side of the sampling perforated tube 8. A self-locking groove 14 is provided on the side of the cleaning scraper 13. A limit protection boss 19 is fixedly connected to the inner side of the sampling perforated tube 8, and the cleaning scraper 13 is slidably connected to the bottom surface of the limit protection boss 19. Through the action of the sampling and cleaning assembly, the sticky soil inside the sampling perforated tube 8 is cleaned.

[0035] Furthermore, the self-locking assembly includes a support plate 9, a sliding self-locking rod 10, and a self-locking spring 16. The support plate 9 is fixedly connected to the side of the self-locking support boss 11, and the self-locking spring 16 is fixedly connected to the inside of the support plate 9. The sliding self-locking rod 10 is fixedly connected to the other side of the self-locking spring 16. The self-locking spring 16 is slidably connected to the inside of the self-locking support boss 11, and the sliding self-locking rod 10 is slidably connected to the inside of the self-locking support boss 11. The sliding self-locking rod 10 is slidably connected to the inside of the support plate 9, and the sliding self-locking rod 10 is slidably connected to the inside of the self-locking groove 14. Through the action of the self-locking assembly, when the sampling and drilling pipe 8 is sampling soil, the compression and reset spring 17 is used to make the sliding self-locking rod 10 slide into the inside of the self-locking groove 14 and lock itself. When internal cleaning is required, the sliding self-locking rod 10 is pulled outward to slide out of the inside of the self-locking groove 14, thereby cleaning the inside of the sampling and drilling pipe 8.

[0036] Structural Description:

[0037] • Support base plate 1: As the basic load-bearing structure of the device, the bottom surface is fixed with casters 2, the top surface is fixed with sampling support frame 3, support adjustment hydraulic cylinder 5 and guide slide rod 7, and the inner side is slidably connected with sampling drilling tube 8, providing an installation platform for each component;

[0038] • Casters 2: Fixed to the bottom surface of the support base plate 1, they are distributed in a rectangular shape at equal intervals to enable flexible movement of the device and facilitate adjustment of the sampling position;

[0039] • Sampling support frame 3: Fixed to the top surface of the support base plate 1, with the top and bottom surfaces connected to the sampling drive hydraulic cylinder 4, providing stable support for the drive assembly;

[0040] • Sampling drive hydraulic cylinder 4: Fixed on the top and bottom surface of the sampling support frame 3, and slidably connected to the sampling hydraulic rod 18 on the inner side, providing power for the drilling and sampling of the sampling perforation tube 8;

[0041] • Support and adjustment hydraulic cylinder 5: Fixed on the top surface of the support base plate 1, distributed in a rectangular shape at equal intervals, and slidably connected to the support hydraulic rod 15 on the inner side, used to drive the support hydraulic rod 15 to extend and retract to adjust the level of the device;

[0042] • Buffer support pad 6: Fixed to the bottom surface of the supporting hydraulic rod 15, the material has cushioning properties, which can enhance the stability of the device and prevent slippage when in contact with the ground;

[0043] • Guide slide rod 7: Fixed on the top surface of the support base plate 1, it is distributed in a rectangular shape at equal intervals, and its outer side is slidably connected to the sliding guide hole of the sampling and punching tube 8, providing lifting and lowering guidance for the sampling and punching tube 8;

[0044] • Sampling and drilling tube 8: The inner side is slidably connected to the cleaning scraper 13, the side is fixed with a self-locking support boss 11, and the top surface is provided with a sliding guide hole for inserting into the soil to complete the sampling. It is the core component of the sampling.

[0045] • Support plate 9: Fixed to the side of the self-locking support boss 11, with a self-locking spring 16 fixed on the inside and a sliding self-locking rod 10 slidably connected to provide installation and support for the self-locking assembly;

[0046] • Sliding self-locking rod 10: It is slidably connected to the self-locking support boss 11 and the inner side of the support sealing plate 9. One end is connected to the self-locking spring 16, and the other end can slide into the self-locking groove 14 to realize the locking and unlocking of the cleaning scraper 13.

[0047] • Self-locking support boss 11: fixed to the side of the sampling and drilling tube 8, with a self-locking component on the inside, providing installation space for the sliding self-locking rod 10 and the self-locking spring 16;

[0048] • Support sliding holes 12: are formed on the top surface of the support base plate 1, are distributed in a rectangular shape at equal intervals, and are slidably connected to the support hydraulic rod 15 on the inner side, providing guidance for the extension and retraction of the support hydraulic rod 15;

[0049] • Cleaning scraper 13: It is slidably connected to the inside of the sampling and drilling tube 8, with a return spring 17 connected to the top surface and a self-locking groove 14 on the side, for scraping off the soil attached to the inner wall of the sampling and drilling tube 8.

[0050] • Self-locking groove 14: It is formed on the side of the cleaning scraper 13, and the inner side can be slidably connected to the sliding self-locking rod 10. The cleaning scraper 13 is locked in position by cooperating with the self-locking rod.

[0051] • Support hydraulic rod 15: It is slidably connected to the inner side of the support adjusting hydraulic cylinder 5 and the support sliding hole 12, and the bottom surface is fixed with a buffer support pad 6 for supporting the device and adjusting the level;

[0052] • Self-locking spring 16: Fixed between the support sealing plate 9 and the sliding self-locking rod 10, the spring force pushes the sliding self-locking rod 10 into the self-locking groove 14 to realize the self-locking function;

[0053] • Reset spring 17: Fixed between the top inner surface of the sampling perforated tube 8 and the cleaning scraper 13. After sampling, it pushes the cleaning scraper 13 down to clean by deforming and restoring its shape.

[0054] • Sampling hydraulic rod 18: It is slidably connected to the inner side of the sampling drive hydraulic cylinder 4, and the bottom surface is fixed with the sampling punch tube 8. It is used to transmit driving force to drive the sampling punch tube 8 to rise and fall.

[0055] • Limiting protection boss 19: Fixed inside the sampling and drilling tube 8, with the bottom surface slidably connected to the cleaning scraper 13, used to limit the maximum upward stroke of the cleaning scraper 13 and protect the reset spring 17;

[0056] Working Principle: When this utility model is needed, the universal wheels 2, which are equidistantly distributed in a rectangle on the bottom surface of the support base plate 1, are used to move the device to the sampling position for initial positioning. The support adjustment hydraulic cylinder 5 is activated, driving the support hydraulic rod 15 to slide downwards along the support sliding hole 12 on the top surface of the support base plate 1 until the buffer support pad 6 at the bottom of the support hydraulic rod 15 contacts the ground and lifts the device, causing the universal wheels 2 to detach from the ground. By adjusting the extension and retraction of the support adjustment hydraulic cylinder 5 at different positions, the horizontality of the device is calibrated to ensure that the sampling and drilling tube 8 is perpendicular to the ground, providing stable support for sampling. During the drilling and sampling operation, the sampling drive hydraulic cylinder 4 drives the sampling hydraulic rod 18 to extend downwards, causing the sampling and drilling tube 8 to pass through the support base plate 1 and drill a hole in the ground. Simultaneously, the sliding guide hole on the top surface of the sampling and drilling tube 8 slides along the guide slide rod 7, providing precise guidance for the up and down movement of the sampling and drilling tube 8 and preventing deviation. When the perforated tube 8 is inserted into the soil, the soil pushes the inner cleaning scraper 13 upward, compressing the return spring 17. When the self-locking groove 14 on the side of the cleaning scraper 13 aligns with the sliding self-locking rod 10 on the inner side of the self-locking support boss 11, the self-locking spring 16 pushes the sliding self-locking rod 10 into the self-locking groove 14, locking the cleaning scraper 13 in the upper part of the inner side of the sampling perforated tube 8, without affecting the soil entering the tube for sampling. After sampling is completed, the sampling drive hydraulic cylinder 4 drives the sampling hydraulic rod 18 and the sampling perforated tube 8 to return upward, pulling the sliding self-locking rod 10 to compress the self-locking spring 16, causing it to slide out of the self-locking groove 14, releasing the lock on the cleaning scraper 13. The return spring 17 returns to its deformation, pushing the cleaning scraper 13 to slide downward along the inner side of the sampling perforated tube 8, scraping away the soil attached to the inner wall. The limiting protection boss 19 restricts the upward sliding position of the cleaning scraper 13, realizing the protection of the compression stroke of the return spring 17.

[0057] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A drilling and sampling device for road and bridge inspection, characterized in that, include: The support base plate (1), casters (2), sampling drive hydraulic cylinder (4), sampling perforation tube (8) and sampling hydraulic rod (18) are provided. The casters (2) are fixedly connected to the bottom surface of the support base plate (1). The casters (2) are distributed in a rectangular equidistant pattern on the bottom surface of the support base plate (1). The top surface of the support base plate (1) is fixedly connected to the sampling support frame (3). The top and bottom surfaces of the sampling support frame (3) are fixedly connected to the sampling drive hydraulic cylinder (4). The sampling hydraulic rod (18) is slidably connected to the inner side of the sampling drive hydraulic cylinder (4). The bottom surface of the sampling hydraulic rod (18) is fixedly connected to the sampling perforation tube (8). The inner side of the support base plate (1) is slidably connected to the sampling perforation tube (8). A planar adjustment support assembly is provided on the top surface of the support base plate (1). A support adjustment hydraulic cylinder (5) is fixedly connected to the top surface of the support base plate (1). The support adjustment hydraulic cylinder (5) is distributed in a rectangular equidistant manner on the top surface of the support base plate (1). A planar adjustment support assembly is provided at the bottom of the support adjustment hydraulic cylinder (5). A sliding guide assembly is provided on the top surface of the support base plate (1). A guide slide rod (7) is fixedly connected to the top surface of the support base plate (1). The guide slide rod (7) is distributed in a rectangular equidistant manner on the top surface of the support base plate (1). A sliding guide assembly is provided on the outer side of the guide slide rod (7). A sampling self-locking cleaning component is installed inside the sampling perforation tube (8). The sampling self-locking cleaning component is used to remove and clean the soil adhering inside the sampling perforation tube (8).

2. The drilling and sampling device for road and bridge inspection according to claim 1, characterized in that, The planar adjustment support assembly includes a support adjustment hydraulic cylinder (5), a buffer support pad (6), and a support hydraulic rod (15). The support adjustment hydraulic cylinder (5) is fixedly connected to the top surface of the support base plate (1), and the support hydraulic rod (15) is slidably connected to the inner side of the support adjustment hydraulic cylinder (5). The top surface of the support base plate (1) is provided with support sliding holes (12) that are distributed in a rectangular shape at equal intervals. The support hydraulic rod (15) is slidably connected to the inner side of the support sliding holes (12), and the buffer support pad (6) is fixedly connected to the bottom surface of the support hydraulic rod (15).

3. The drilling and sampling device for road and bridge inspection according to claim 1, characterized in that, The sliding guide assembly includes a guide slide rod (7) and a sampling perforated tube (8). The top surface of the sampling perforated tube (8) is provided with a sliding guide hole. The sliding guide holes are distributed in a rectangular equidistant pattern on the top surface of the sampling perforated tube (8). The guide slide rod (7) is slidably connected to the inner side of the sliding guide hole.

4. The drilling and sampling device for road and bridge inspection according to claim 1, characterized in that, The sampling self-locking cleaning component includes a sampling cleaning component and a self-locking component. A self-locking support boss (11) is fixedly connected to the side of the sampling perforated tube (8). The sampling cleaning component is hollow inside the sampling perforated tube (8), and the self-locking component is provided inside the self-locking support boss (11).

5. The drilling and sampling device for road and bridge inspection according to claim 4, characterized in that, The sampling cleaning assembly includes a cleaning scraper (13) and a return spring (17). The return spring (17) is fixedly connected to the top inner surface of the sampling perforated tube (8). The cleaning scraper (13) is fixedly connected to the bottom surface of the return spring (17). The cleaning scraper (13) is slidably connected to the inner side of the sampling perforated tube (8). A self-locking groove (14) is provided on the side of the cleaning scraper (13). A limit protection boss (19) is fixedly connected to the inner side of the sampling perforated tube (8). The cleaning scraper (13) is slidably connected to the bottom surface of the limit protection boss (19).

6. The drilling and sampling device for road and bridge inspection according to claim 5, characterized in that, The self-locking assembly includes a support plate (9), a sliding self-locking rod (10), and a self-locking spring (16). The support plate (9) is fixedly connected to the side of the self-locking support boss (11). The self-locking spring (16) is fixedly connected to the inside of the support plate (9). The sliding self-locking rod (10) is fixedly connected to the other side of the self-locking spring (16). The self-locking spring (16) is slidably connected to the inside of the self-locking support boss (11). The sliding self-locking rod (10) is slidably connected to the inside of the self-locking support boss (11). The sliding self-locking rod (10) is slidably connected to the inside of the support plate (9). The sliding self-locking rod (10) is slidably connected to the inside of the self-locking groove (14).

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