A sampling and sample preparation device for highway maintenance inspection

Abstract

This invention relates to the field of sampling and sample preparation technology, and discloses a sampling and sample preparation device for highway maintenance and inspection. The device includes a movable frame and a sampling cylinder mounted on the movable frame. The movable frame is equipped with a lifting assembly and a drill bit drive assembly. The lifting assembly drives the sampling cylinder to move up and down to enter and exit the road surface. This device incorporates a road core clamping assembly within the inner cylinder. After cutting, an electric push rod drives a push-pull rod and a wedge block to move downwards, pushing an arc-shaped clamping plate to clamp the road core. When the lifting assembly lifts the sampling cylinder, the road core is carried out of the drill hole along with it, eliminating the need for manual clamping with external fixtures. This solves the problems of sample retention in the hole and time-consuming and laborious clamping. Furthermore, an electric push rod drives a supporting circular plate to rotate, causing the sampling cylinder to tilt. Under gravity, the road core automatically slides into the loading hopper. This integrates the processes of road core sampling, clamping, lifting, unloading, and storage, improving the efficiency of road core sampling.

Description

Technical Field

[0001] This invention relates to the field of sampling and sample preparation technology, specifically to a sampling and sample preparation device for highway maintenance and inspection. Background Technology

[0002] Testing and inspection in highway engineering is a crucial component of highway engineering quality management, control, and acceptance. In highway maintenance and inspection, core sampling is widely used due to its scientific, intuitive, and practical characteristics, particularly in pavement structure thickness testing, material performance evaluation, and construction quality assessment. Obtaining cylindrical core samples from the pavement using a core sampling device, and then conducting laboratory or field tests, is an important means of evaluating pavement structural strength and construction quality.

[0003] Through in-depth research, the inventors of this application discovered that existing core sampling processes mostly use a cylindrical drill bit for rotary cutting. However, after cutting, the core sample often remains inside the borehole and is difficult to extract with the drill bit. In this case, a special clamp is needed for manual clamping and extraction. Traditional clamps not only require continuous force for a long time during operation, but also require a large axial tensile force to overcome the frictional resistance between the core sample and the borehole wall, which significantly increases the difficulty and labor intensity of the sampling operation. Summary of the Invention

[0004] This invention provides a sampling and sample preparation device for highway maintenance and inspection, which aims to solve the problem that in the prior art, after the core sample is cut, it often remains in the borehole and is difficult to be pulled out with the drill. At this time, it is necessary to use a special clamp to manually hold and extract it, which is time-consuming and labor-intensive.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solution: a sampling and sample preparation device for highway maintenance and inspection, comprising a movable frame and a sampling cylinder disposed on the movable frame, wherein the movable frame is provided with a lifting component and a drill bit drive component, the lifting component is used to drive the sampling cylinder to move up and down to enter and exit the road surface, and the drill bit drive component is used to drive the sampling cylinder to rotate to cut the road core. The sampling cylinder includes an outer cylinder and an inner cylinder that are coaxially sleeved together. The lower end of the outer cylinder is provided with a tapered cutting blade. The inner cylinder is fixedly mounted on the moving frame and remains stationary in the circumferential direction. The sampling cylinder is also equipped with a core clamping assembly, which is installed inside the inner cylinder and is used to clamp and fix the core located inside the inner cylinder after cutting, so that the core is brought out of the borehole as the sampling cylinder rises.

[0006] By adopting the above technical solution, when the sampling tube is cut, the outer tube rotates and cuts into the road surface, while the inner tube remains stationary to accommodate the road core. After the cutting is completed, the road core is clamped and fixed by the road core clamping component in the inner tube, so that the road core is brought out of the borehole along with the sampling tube as it rises, thus eliminating the need for manual extraction with the help of external clamps.

[0007] Preferably, the outer cylindrical body includes an outer sleeve, a core sample receiving tube is provided on the lower inner side of the outer sleeve, the outer sleeve is fixedly connected to the bottom of the core sample receiving tube by a tapered cutting blade, a toothed ring is fixedly connected to the upper outer side of the outer sleeve, and a connecting ring plate is fixedly connected to the top of the toothed ring.

[0008] Preferably, the inner cylinder includes an insert cylinder fitted between the outer sleeve and the core sample receiving tube, and the insert cylinder has an annular operating groove on its inner side.

[0009] Preferably, the lifting assembly includes a lead screw rotatably connected to one side of the movable frame via a bearing. A drive motor for driving the lead screw to rotate is installed on the top of the movable frame. A connecting block is threadedly connected to the outer side of the lead screw. A guide rod is fixedly connected to the other side of the movable frame. A connecting block is slidably connected to the outer side of the guide rod. The connecting block and the connecting block slide vertically on the outer side of the movable frame. A support circular plate is rotatably connected to each side of the connecting block and the connecting block via a pin.

[0010] Preferably, the bottom of the supporting circular plate is provided with a sliding groove for the connecting ring plate to slide, and the embedded cylinder is fixedly connected to the supporting circular plate.

[0011] Preferably, the drill bit drive assembly includes a support plate fixedly connected to the outside of the support circular plate, a second drive motor fixedly installed on the top of the support plate, the output end of the second drive motor passing through the support plate and fixedly connected to a gear, the gear meshing with a gear ring.

[0012] Preferably, the core clamping assembly includes arc-shaped clamping plates disposed on opposite sides of the annular operating groove. The arc-shaped clamping plates are fixedly connected to the embedded cylinder via a pusher. Push-pull rods are slidably connected to both inner sides of the embedded cylinder. The push-pull rods are guided by a support. A wedge block is fixedly connected to the bottom of the push-pull rod. A drive block that cooperates with the wedge block is fixedly connected to the outer side of the arc-shaped clamping plate.

[0013] Preferably, an electric push rod is fixedly mounted on the top of the supporting circular plate via a mounting base, and a connecting strip is fixedly connected to the telescopic end of the electric push rod, the connecting strip being fixedly connected to the top of the push-pull rods on both sides.

[0014] Preferably, the pushing member consists of a telescopic rod and a tension spring fixedly connected between the inner walls on both sides of the telescopic rod.

[0015] Preferably, an electric push rod two is movably installed on the mobile frame, the telescopic end of the electric push rod two is hinged to the supporting circular plate, and a loading hopper for storing road cores is inclinedly arranged on the outer side of the mobile frame.

[0016] This invention provides a sampling and sample preparation device for highway maintenance and inspection. It has the following beneficial effects: This invention integrates a core clamping assembly within the inner cylinder. After cutting, an electric push rod drives a push-pull rod and a wedge block to move downwards, pushing an arc-shaped clamping plate to clamp the core. When the lifting assembly raises the sampling cylinder, the core is carried out of the drill hole along with it, eliminating the need for manual clamping with external fixtures. This solves the problems of core samples remaining in the hole and time-consuming and laborious clamping. Furthermore, an electric push rod pushes a supporting circular plate to rotate, causing the sampling cylinder to tilt. Under the action of gravity, the core automatically slides into the loading hopper. This integrates the processes of core sampling, clamping, lifting, unloading, and storage into one, improving the efficiency of core sampling. Attached Figure Description

[0017] Figure 1 This is a three-dimensional schematic diagram of the mobile frame of the present invention; Figure 2 This is an exploded perspective view of the sampling cylinder of the present invention. Figure 3 This is a three-dimensional cross-sectional view of the sampling cylinder of the present invention; Figure 4 This is a three-dimensional schematic diagram of the outer cylindrical body of the present invention; Figure 5 This is a three-dimensional schematic diagram of the inner cylinder of the present invention; Figure 6 This is a three-dimensional schematic diagram of the lifting component of the present invention; Figure 7 This is a three-dimensional schematic diagram of the drill bit drive assembly of the present invention; Figure 8 This is a three-dimensional schematic diagram of the core clamping assembly of the present invention; Figure 9 For the present invention Figure 8 Enlarged 3D view of part A in the middle; Figure 10 This is an exploded perspective view of the pusher component of the present invention; Figure 11 This is a three-dimensional schematic diagram of the loading hopper of the present invention.

[0018] Among them: 1. Mobile frame; 2. Sampling cylinder; 201. Outer cylinder; 2011. Outer sleeve; 2012. Core sample receiving tube; 2013. Gear ring; 2014. Connecting ring plate; 2015. Conical cutting blade; 202. Inner cylinder; 2021. Embedded cylinder; 2022. Annular operating groove; 3. Lifting assembly; 301. Lead screw; 302. Drive motor one; 303. Connecting block one; 304. Guide rod; 305. Connecting block two; 306. Supporting circular plate; 4. Drill bit drive assembly; 401. Bearing plate; 402. Drive motor II; 403. Gear; 5. Core clamping assembly; 501. Arc-shaped clamping plate; 502. Pushing component; 5021. Telescopic rod; 5022. Tension spring; 503. Push-pull rod; 504. Support component; 505. Wedge block; 506. Drive block; 507. Electric push rod one; 508. Connecting strip; 6. Two electric push rods; 7. Feed hopper. Detailed Implementation

[0019] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. 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.

[0020] Please see the appendix Figure 1 -Appendix Figure 11 This invention provides a sampling and preparation device for highway maintenance and inspection, including a mobile frame 1 and a sampling cylinder 2 disposed on the mobile frame 1. The mobile frame 1 is provided with a lifting component 3 and a drill bit drive component 4. The lifting component 3 is used to drive the sampling cylinder 2 to rise and fall to enter and exit the road surface, and the drill bit drive component 4 is used to drive the sampling cylinder 2 to rotate to cut the road core. The sampling cylinder 2 includes an outer cylinder 201 and an inner cylinder 202 coaxially sleeved together. The lower end of the outer cylinder 201 is provided with a tapered cutting blade 2015. The inner cylinder 202 is fixedly mounted on the movable frame 1 and keeps circumferentially stationary. The sampling cylinder 2 is also equipped with a core clamping assembly 5, which is installed inside the inner cylinder 202. It is used to clamp and fix the core located in the inner cylinder 202 after cutting, so that the core is brought out of the borehole as the sampling cylinder 2 rises.

[0021] Specifically, the operator first moves the mobile frame 1 to the predetermined sampling position on the highway surface, aligning the axis of the sampling cylinder 2 set on the mobile frame 1 with the sampling point. At this time, the lifting component 3 is in the initial state, and the sampling cylinder 2 is located above the road surface and maintains a safe distance from the road surface. Then, the operator starts the lifting component 3, which drives the sampling cylinder 2 to move downward as a whole. At the same time, the drill bit drive component 4 is started, which drives the outer cylinder 201 of the sampling cylinder 2 to rotate at high speed around its own axis. When the conical cutting blade 2015 at the lower end of the outer cylinder 201 rotates synchronously with the outer cylinder 201 and comes into contact with the road surface, it gradually cuts into the road structure layer through the rotary cutting action. As the sampling cylinder 2 continues to descend, the road surface is cut into an annular groove, and its central part naturally forms a cylindrical road core. During this process, since the inner cylinder 202 is fixedly mounted on the moving frame 1 and remains circumferentially stationary, that is, the inner cylinder 202 does not rotate with the outer cylinder 201, when the core enters the sampling cylinder 2 relative to the sampling cylinder 2 as it descends, the core enters the inner cavity of the inner cylinder 202. The core clamping assembly 5 installed inside the inner cylinder 202 is in a non-working state (i.e., open state) at this time, so it will not obstruct the entry of the core. When the sampling cylinder 2 descends to the predetermined sampling depth, the conical cutting blade 2015 completes the cutting of the bottom of the road core. At this time, the lifting assembly 3 stops driving the sampling cylinder 2 to descend, and the drill bit drive assembly 4 stops rotating, completing the cutting operation. Immediately afterwards, the operator starts the road core clamping assembly 5 installed in the inner cylinder 202. The road core clamping assembly 5 moves inside the inner cylinder 202, clamping and fixing the road core located inside the inner cylinder 202 securely. After the road core is reliably clamped, the lifting assembly 3 is started again, driving the sampling cylinder 2 to move upward as a whole. Therefore, the clamped and fixed road core rises together with the sampling cylinder 2 during the upward process, and the road core is completely brought out from the drill hole in the road surface, thus completing the automatic removal operation of the road core.

[0022] Please see the appendix Figure 2 -Appendix Figure 5 and Figure 7 The outer cylindrical body 201 includes an outer sleeve 2011, with a core sample receiving tube 2012 disposed on the lower inner side of the outer sleeve 2011. The outer sleeve 2011 is fixedly connected to the bottom of the core sample receiving tube 2012 via a tapered cutting blade 2015. A toothed ring 2013 is fixedly connected to the upper outer side of the outer sleeve 2011, and a connecting ring plate 2014 is fixedly connected to the top of the toothed ring 2013. The inner cylindrical body 202 includes an insert cylinder 2021 fitted between the outer sleeve 2011 and the core sample receiving tube 2012. An annular operating groove 2022 is provided on the inner side of the 21. A sliding groove for sliding the connecting ring plate 2014 is provided at the bottom of the supporting circular plate 306. The embedded cylinder 2021 is fixedly connected to the supporting circular plate 306. The drill bit drive assembly 4 includes a bearing plate 401 fixedly connected to the outside of the supporting circular plate 306. A second drive motor 402 is fixedly installed on the top of the bearing plate 401. The output end of the second drive motor 402 passes through the bearing plate 401 and is fixedly connected to a gear 403. The gear 403 meshes with the gear ring 2013.

[0023] Specifically, when sampling is required, the operator starts the second drive motor 402. The output end of the second drive motor 402 rotates and drives the gear 403 to rotate synchronously. Since the gear 403 is meshed with the gear ring 2013 fixedly connected to the upper side of the outer tube 2011, the rotation of the gear 403 is transmitted to the outer tube 2011 through the gear ring 2013, driving the outer tube 2011 to rotate around its own axis. The outer tube 2011 is fixedly connected to the bottom of the core sample receiving tube 2012 through the tapered cutting blade 2015 at its bottom. At the same time, a connecting ring plate 2014 is fixedly connected to the top of the outer tube 2011. The connecting ring plate 2014 is slidably fitted in the groove opened at the bottom of the supporting circular plate 306. Therefore, when the outer tube 2011 is driven to rotate, the core sample receiving tube 2012 rotates synchronously with the outer tube 2011, while the connecting ring plate 2014 slides in the groove at the bottom of the supporting circular plate 306 to ensure that the outer cylinder 201 rotates stably around its own axis. Since the embedded cylinder 2021 is fixedly connected to the supporting circular plate 306, and the supporting circular plate 306 is relatively fixed to the moving frame 1 through the lifting component 3, the embedded cylinder 2021 does not rotate with the outer cylinder 201, that is, the inner cylinder 202 always remains circumferentially stationary. At the same time, the embedded cylinder 2021 is fitted into the annular gap between the outer sleeve 2011 and the core sample receiving tube 2012. The embedded cylinder 2021 forms a gap fit with the rotating outer sleeve 2011 and the core sample receiving tube 2012, and they do not interfere with each other. Through the above fit, the double-layer nesting linkage working mode of rotating cutting of the outer cylinder 201 and stationary guidance of the inner cylinder 202 is realized, ensuring that the core can smoothly enter the inner cavity of the inner cylinder 202 during the cutting process.

[0024] Please see the appendix Figure 6 The lifting assembly 3 includes a lead screw 301 rotatably connected to one side of the movable frame 1 via a bearing. A drive motor 302 for driving the lead screw 301 to rotate is installed on the top of the movable frame 1. A connecting block 303 is threadedly connected to the outer side of the lead screw 301. A guide rod 304 is fixedly connected to the other side of the movable frame 1. A connecting block 305 is slidably connected to the outer side of the guide rod 304. The connecting blocks 303 and 305 slide vertically on the outer side of the movable frame 1. A support plate 306 is rotatably connected to the corresponding side of the connecting blocks 303 and 305 via a pin.

[0025] Specifically, when it is necessary to drive the sampling cylinder 2 to descend for cutting operations, drive motor 302 is started. The output end of drive motor 302 drives the lead screw 301 to rotate in the forward direction. Since the connecting block 303 is threadedly engaged with the lead screw 301, and the connecting block 303 is slidably engaged with the guide rod 304 through the support plate 306 and the connecting block 305, when the lead screw 301 rotates, the connecting block 303 moves downward along the lead screw 301, and at the same time the connecting block 305 slides downward along the guide rod 304, driving the support plate 306 and the sampling cylinder 2 installed on it to descend stably as a whole. When the cutting is completed and the core is clamped and fixed, when it is necessary to lift the sampling cylinder 2, drive motor 302 is rotated in the reverse direction, which will drive the support plate 306 and the sampling cylinder 2 to rise stably as a whole.

[0026] Please see the appendix Figure 8 -Appendix Figure 10 The core clamping assembly 5 includes arc-shaped clamping plates 501 disposed on opposite sides of the annular operating groove 2022. The arc-shaped clamping plates 501 are fixedly connected to the embedded cylinder 2021 via a pusher 502. Push-pull rods 503 are slidably connected to both inner sides of the embedded cylinder 2021. The push-pull rods 503 are guided by a support 504. A wedge block 505 is fixedly connected to the bottom of the push-pull rod 503. A drive block 506 that cooperates with the wedge block 505 is fixedly connected to the outer side of the arc-shaped clamping plate 501. An electric push rod 507 is fixedly installed on the top of the support circular plate 306 via a mounting seat. A connecting strip 508 is fixedly connected to the telescopic end of the electric push rod 507. The connecting strip 508 is fixedly connected to the top of the push-pull rods 503 on both sides. The pusher 502 consists of a telescopic rod 5021 and a tension spring 5022 fixedly connected between the inner walls of the telescopic rod 5021 on both sides.

[0027] Specifically, before the sampling cylinder 2 performs the cutting operation, the core clamping assembly 5 is in an initial non-working state. At this time, the telescopic end of the electric push rod 507 is in a retracted state. The electric push rod 507 drives the push-pull rods 503 on both sides to be in the upper position through the connecting strip 508. The inclined wedge block 505 at the bottom of the push-pull rod 503 is in the upper position synchronously with the push-pull rod 503. The first inclined surface of the inclined wedge block 505 does not contact or only slightly contacts the second inclined surface of the drive block 506 and does not produce compression. As a result, the arc-shaped clamping plate 501 maintains the contracted state under the elastic force of the tension spring 5022 in the pusher 502. More specifically, the two ends of the tension spring 5022 are fixedly connected to the opposite sides of the inner wall of the telescopic rod 5021. The tension spring 5022 is always in a stretched state and has a tendency to contract and return. This contraction and return force is transmitted to the arc-shaped clamping plate 501 through the telescopic rod 5021, which continuously pulls the arc-shaped clamping plate 501 away from the road core, so that the distance between the two arc-shaped clamping plates 501 is kept greater than the outer diameter of the road core, thereby ensuring that the road core can smoothly enter the embedded cylinder 2021 without obstruction during subsequent drilling. When the cutting operation is completed and the core needs to be clamped and fixed, the electric push rod 507 is activated, extending its telescopic end downwards and pushing the connecting strip 508 downwards. The connecting strip 508 drives the push-pull rods 503 on both sides, which are fixed to it, to slide downwards synchronously in the vertical direction under the guidance of the support member 504. When the push-pull rods 503 move downwards, they drive the wedge blocks 505 fixed at their bottom to move downwards synchronously. During the downward movement of the wedge blocks 505, the first inclined surface on them gradually contacts and presses against the second inclined surface on the drive block 506. As the wedge blocks move downwards, the first inclined surface on them gradually contacts and presses against the second inclined surface on the drive block 506. As block 505 continues to move downward, it pushes drive block 506 to move inward (i.e. towards the road core). Drive block 506 drives arc-shaped clamping plate 501, which is fixedly connected to it, to move inward synchronously. When arc-shaped clamping plate 501 moves inward, it drives telescopic rod 5021 to open, and its retraction and reset pull increases, but it is not enough to resist the clamping force applied by electric push rod 507 through wedge block 505. Then, the arc-shaped clamping plate 501, which is set opposite to each other, gradually approaches from both sides and finally clamps the outer wall of the road core located in the embedded cylinder 2021, thereby achieving clamping and fixing of the road core. When the sampling cylinder 2 rises to the unloading height and the road core needs to be released, the electric push rod 507 retracts its telescopic end upward, driving the connecting bar 508 and the push-pull rod 503 to move upward. The push-pull rod 503 drives the wedge block 505 to move upward synchronously, eliminating the squeezing effect on the drive block 506. At this time, under the action of the contraction and reset force of the tension spring 5022, the telescopic rod 5021 resets inward, pulling the arc-shaped clamping plate 501 to move away from the road core. The two arc-shaped clamping plates 501 open, releasing the clamping force on the road core, thereby completing the release of the road core.

[0028] Please see the appendix Figure 1 and attached Figure 11 An electric push rod 6 is movably installed on the mobile frame 1. The telescopic end of the electric push rod 6 is hinged to the supporting circular plate 306. A loading hopper 7 for storing road cores is inclinedly arranged on the outer side of the mobile frame 1.

[0029] Specifically, after the sampling cylinder 2 is lifted to the predetermined unloading height by the lifting component 3, the electric push rod 2 6 is activated, causing its telescopic end to extend and push the support circular plate 306 to rotate around the pin between it and the connecting block 1 303 and the connecting block 2 305. The support circular plate 306 causes the sampling cylinder 2 installed on it to gradually tilt from a vertical state, so that the bottom opening of the sampling cylinder 2 faces the loading hopper 7. Then, the core clamping component 5 releases the clamping force on the core, and the core slides down the inclined inner wall of the sampling cylinder 2 under its own gravity, slides out through the bottom opening of the sampling cylinder 2, and then falls into the loading hopper 7, completing the automatic unloading and storage of the core. After unloading is completed, the electric push rod 2 6 is activated, causing its telescopic end to retract and pulling the support circular plate 306 to rotate in the opposite direction to reset, so that the sampling cylinder 2 returns to a vertical state and waits for the next sampling operation.

[0030] Workflow: The operator moves the mobile frame 1 to the predetermined sampling position on the highway surface, aligning the axis of the sampling cylinder 2 set on the mobile frame 1 with the sampling point. At this time, the lifting assembly 3 is in the initial state, and the sampling cylinder 2 is located above the road surface and maintains a safe distance from the road surface. Then, the operator starts the drive motor 302. The output end of the drive motor 302 drives the lead screw 301 to rotate in the forward direction. Since the connecting block 303 is threadedly engaged with the lead screw 301, and the connecting block 303 is slidably engaged with the guide rod 304 through the support plate 306 and the connecting block 305, when the lead screw 301 rotates, the connecting block 303 moves downward along the lead screw 301, and at the same time, the connecting block 305 slides downward along the guide rod 304, causing the support plate 306 and the sampling cylinder 2 installed on it to descend stably as a whole. Simultaneously, drive motor 402 is started. The output end of drive motor 402 rotates and drives gear 403 to rotate synchronously. Since gear 403 is meshed with gear ring 2013 fixedly connected to the upper side of outer tube 2011, the rotation of gear 403 is transmitted to outer tube 2011 through gear ring 2013, driving outer tube 2011 to rotate around its own axis. Core sample receiving tube 2012 rotates synchronously with outer tube 2011. Conical cutting blade 2015 rotates synchronously with outer tube 2011 and contacts the road surface. Through rotary cutting action, it gradually cuts into the road surface structure layer. As sampling cylinder 2 continues to descend, the road surface is cut into annular grooves. Finally, the road core will enter the inner cavity of inner cylinder 202. When the cutting operation is completed and the road core needs to be clamped and fixed, the electric push rod 507 is activated, so that its telescopic end extends downward and pushes the connecting strip 508 to move downward. The connecting strip 508 drives the push-pull rods 503 on both sides that are fixed to it to slide downward in the vertical direction synchronously under the guidance of the support member 504. When the push-pull rods 503 move downward, they drive the wedge block 505 fixed at its bottom to move downward synchronously. During the downward movement of the wedge block 505, the first inclined surface on it gradually contacts and squeezes the second inclined surface on the drive block 506. As the wedge block 505 continues to move downward, it pushes the drive block 506 to move inward (i.e. towards the road core). The drive block 506 drives the arc-shaped clamping plate 501 fixed to it to move inward synchronously. When the arc-shaped clamping plate 501 moves inward, it drives the telescopic rod 5021 to open. Then, the arc-shaped clamping plate 501, which is set in opposite directions, gradually approaches from both sides and finally clamps the outer wall of the road core located in the embedded cylinder 2021, thereby achieving the clamping and fixing of the road core. After the sampling cylinder 2 is lifted to the predetermined unloading height by the lifting assembly 3, the electric push rod 2 6 is activated, causing its telescopic end to extend and push the support plate 306 to rotate around the pin between it and the connecting block 1 303 and the connecting block 2 305. The support plate 306 causes the sampling cylinder 2 mounted on it to gradually tilt from a vertical position, so that the bottom opening of the sampling cylinder 2 faces the loading hopper 7. Then, the electric push rod 1 507 retracts its telescopic end upward, causing the connecting bar 508 and the push-pull rod 503 to move upward. The push-pull rod 503 causes the inclined wedge block 505 to move upward synchronously. At this time, the tension spring... Under the retraction and reset force of the spring 5022, the telescopic rod 5021 resets inward, pulling the arc-shaped clamping plate 501 to move away from the road core. The two arc-shaped clamping plates 501 open, releasing the clamping force on the road core. Under its own gravity, the road core slides down the inclined inner wall of the sampling cylinder 2, slides out through the opening end at the bottom of the sampling cylinder 2, and then falls into the loading hopper 7, completing the automatic unloading and storage of the road core. After unloading, the electric push rod 6 is activated to retract its telescopic end, pulling the support circular plate 306 to rotate in the opposite direction and reset, so that the sampling cylinder 2 returns to the vertical state, waiting for the next sampling operation.

[0031] Although embodiments of the 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 invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A sampling and sample preparation device for highway maintenance and inspection, comprising a movable frame (1) and a sampling cylinder (2) disposed on the movable frame (1), characterized in that; The mobile frame (1) is equipped with a lifting assembly (3) and a drill bit drive assembly (4). The lifting assembly (3) is used to drive the sampling cylinder (2) to move up and down to enter and exit the road surface. The drill bit drive assembly (4) is used to drive the sampling cylinder (2) to rotate to cut the road core. The sampling tube (2) includes an outer tube (201) and an inner tube (202) coaxially sleeved. The lower end of the outer tube (201) is provided with a conical cutting blade (2015). The inner tube (202) is fixedly mounted on the moving frame (1) and remains stationary in the circumferential direction. The sampling cylinder (2) is also provided with a core clamping assembly (5). The core clamping assembly (5) is installed inside the inner cylinder (202) and is used to clamp and fix the core located in the inner cylinder (202) after cutting, so that the core is brought out of the borehole as the sampling cylinder (2) rises.

2. The sampling and sample preparation device for highway maintenance and inspection according to claim 1, characterized in that, The outer cylindrical body (201) includes an outer sleeve (2011), and a core sample receiving tube (2012) is provided on the lower inner side of the outer sleeve (2011). The outer sleeve (2011) is fixedly connected to the bottom of the core sample receiving tube (2012) through a conical cutting blade (2015). A toothed ring (2013) is fixedly connected to the upper outer side of the outer sleeve (2011), and a connecting ring plate (2014) is fixedly connected to the top of the toothed ring (2013).

3. A sampling and sample preparation device for highway maintenance and inspection according to claim 2, characterized in that, The inner cylinder (202) includes an insert cylinder (2021) fitted between the outer sleeve (2011) and the core sample receiving tube (2012), and an annular operating groove (2022) is provided on the inner side of the insert cylinder (2021).

4. A sampling and sample preparation device for highway maintenance and inspection according to claim 3, characterized in that, The lifting assembly (3) includes a lead screw (301) rotatably connected to one side of the movable frame (1) via a bearing. A drive motor (302) for driving the lead screw (301) to rotate is installed on the top of the movable frame (1). A connecting block (303) is threadedly connected to the outer side of the lead screw (301). A guide rod (304) is fixedly connected to the other side of the movable frame (1). A connecting block (305) is slidably connected to the outer side of the guide rod (304). The connecting block (303) and the connecting block (305) slide vertically on the outer side of the movable frame (1). A support plate (306) is rotatably connected to the corresponding side of the connecting block (303) and the connecting block (305) via a pin.

5. A sampling and sample preparation device for highway maintenance and inspection according to claim 4, characterized in that, The bottom of the supporting circular plate (306) is provided with a sliding groove for the connecting ring plate (2014) to slide, and the embedded cylinder (2021) is fixedly connected to the supporting circular plate (306).

6. A sampling and sample preparation device for highway maintenance and inspection according to claim 5, characterized in that, The drill bit drive assembly (4) includes a support plate (401) fixedly connected to the outside of the support circular plate (306). A second drive motor (402) is fixedly installed on the top of the support plate (401). The output end of the second drive motor (402) passes through the support plate (401) and is fixedly connected to a gear (403). The gear (403) meshes with a gear ring (2013).

7. A sampling and sample preparation device for highway maintenance and inspection according to claim 6, characterized in that, The core clamping assembly (5) includes an arc-shaped clamping plate (501) disposed on opposite sides of the annular operating groove (2022). The arc-shaped clamping plate (501) is fixedly connected to the embedded cylinder (2021) via a pusher (502). Push-pull rods (503) are slidably connected to both inner sides of the embedded cylinder (2021). The push-pull rods (503) are guided by a support (504). A wedge block (505) is fixedly connected to the bottom of the push-pull rod (503). A drive block (506) that cooperates with the wedge block (505) is fixedly connected to the outer side of the arc-shaped clamping plate (501).

8. A sampling and sample preparation device for highway maintenance and inspection according to claim 7, characterized in that, An electric push rod (507) is fixedly installed on the top of the supporting circular plate (306) via a mounting base. A connecting strip (508) is fixedly connected to the telescopic end of the electric push rod (507). The connecting strip (508) is fixedly connected to the top of the push-pull rods (503) on both sides.

9. A sampling and sample preparation device for highway maintenance and inspection according to claim 7, characterized in that, The pusher (502) consists of a telescopic rod (5021) and a tension spring (5022) fixedly connected between the inner walls on both sides of the telescopic rod (5021).

10. A sampling and sample preparation device for highway maintenance and inspection according to claim 4, characterized in that, An electric push rod 2 (6) is movably installed on the mobile frame (1). The telescopic end of the electric push rod 2 (6) is hinged to the support circular plate (306). A loading hopper (7) for storing road cores is inclinedly arranged on the outer side of the mobile frame (1).

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