Pavement coring machine for highway detection

Abstract

The invention relates to the field of road surface coring, in particular to a road surface coring machine for highway detection, which comprises a moving frame and a coring cylinder with a water injection port at the upper end; the coring device further comprises a collecting unit arranged around the coring barrel, and the collecting unit comprises a collecting shell which is of an annular structure and arranged on the periphery of the coring barrel in a sleeving mode along the axis of the coring barrel; the flow choking ring is arranged on the lower portion of the inner ring side of the collecting shell, the flow choking ring is of a funnel-shaped structure, the lower portion of the flow choking ring can make contact with the road surface, and the lower portion of the flow choking ring and the collecting shell jointly form a flow choking cavity; the flow guide unit is arranged in the flow blocking cavity, and the flow guide unit comprises a plurality of flow guide brushes arranged around the axis of the coring barrel, and the flow guide brushes can rotate around the axis of the coring barrel; the driving unit is used for driving the flow guide brush to rotate. According to the invention, mud is prevented from invading the normal traffic lane of the expressway during operation, the high-speed driving safety is guaranteed, and the workload of subsequent cleaning is reduced.

Description

Technical Field

[0001] This invention relates to the field of road surface coring, specifically to a road surface coring machine for highway inspection. Background Technology

[0002] When testing the structural strength and material properties of highway pavement, a pavement coring machine is required to extract cores from the pavement. During core extraction, it is necessary to ensure that the core drilling operation is stable, thereby reducing the probability of core jamming during drilling.

[0003] Chinese Patent Publication No. CN115586037B discloses a road surface core sampling machine for highway inspection, comprising: a moving mechanism having an equilateral triangular base plate and a shielding component limited and installed at the bottom of the base plate; a synchronization mechanism having a receiving cylinder and a lifting cylinder slidably installed in the inner cavity of the receiving cylinder, wherein a compression spring is elastically connected between the top of the inner cavity of the lifting cylinder and the bottom of the inner cavity of the receiving cylinder; a tube frame mechanism having a triangular tube frame and an inclined guide tube fixedly connected to one end of the triangular tube frame, wherein a plurality of spray heads are evenly installed on the surface of the inclined guide tube; and a core sampling mechanism having an adapter and a core sampling cylinder assembled at the bottom of the adapter.

[0004] The above-mentioned solution uses a threaded rail to drive the core sampler at a uniform speed, reducing the probability of jamming. Additionally, to prevent the core sampler from breaking during drilling, a protective cover is installed around it. While this cover provides protection, it hinders observation of the drilling progress. Furthermore, to reduce dust during drilling, a water inlet is typically installed at the top of the core sampler. Water is discharged through this inlet during operation, flowing to the bottom of the core sampler under gravity. While there is no dust during the entire operation, mud may leak from the core sample location. If the mud leaks beyond the working area, it may encroach on the normal driving area of ​​the highway, affecting traffic safety. Moreover, cleaning the road surface is required after the operation, resulting in a large workload and low efficiency. Summary of the Invention

[0005] To address the aforementioned issues, a road surface coring machine for highway inspection is provided. By setting up a collection unit surrounding the coring cylinder and multiple nested flow-blocking rings, the flow-blocking rings, combined with their own rebound force, tightly adhere to the road surface to form a closed flow-blocking cavity. At the same time, the staggered sweeping structure of the guide brush and scraper effectively intercepts the mud generated during the coring operation, preventing the mud from overflowing the working area under the action of gravity and centrifugal force.

[0006] To address the problems of existing technologies, this invention provides a road surface coring machine for highway inspection, comprising a movable frame and a coring cylinder with a water inlet at the top;

[0007] It also includes a collection unit arranged around the core sampling cylinder, the collection unit comprising:

[0008] The collecting shell, which has a ring structure, is sleeved around the core sampling cylinder along the axis of the core sampling cylinder. The collecting shell is used to collect mud.

[0009] A flow-blocking ring is disposed on the lower part of the inner ring side of the collection shell. The flow-blocking ring has a funnel-shaped structure, and the lower part of the flow-blocking ring can contact the road surface and form a flow-blocking cavity together with the collection shell.

[0010] A flow guiding unit is disposed within the flow obstruction cavity, the flow guiding unit comprising:

[0011] Multiple flow guide brushes are arranged around the axis of the core sampling cylinder. The flow guide brushes can rotate around the axis of the core sampling cylinder, and the bottom of the flow guide brushes can slide and engage with the bottom of the flow obstruction cavity.

[0012] The drive unit is used to drive the guide brush to rotate.

[0013] Preferably, the inner ring side of the collecting shell has a guide slope, the guide slope has a funnel-shaped structure, and a scraper is rotatably arranged on the upper end face of the guide slope around the axis of the core sampling cylinder, the scraper slidingly engaging with the upper end face of the guide slope.

[0014] Preferably, the guide brush and the scraper are staggered, the guide brush forms a first sweeping area when it rotates, and the scraper forms a second sweeping area with the same shape as the end face of the guide slope when it rotates, and the first sweeping area and the second sweeping area intersect.

[0015] Preferably, a second lifting unit for driving the collection unit to rise and fall is provided on one side of the collection unit.

[0016] Preferably, multiple flow-blocking rings are nested along the radial direction of the core-taking cylinder.

[0017] Preferably, the innermost flow-blocking ring is made of a wear-resistant elastic material.

[0018] Preferably, a slurry discharge port is provided on the side wall of the collection shell, and a pump body connected to the slurry discharge port is provided on one side of the collection shell.

[0019] Preferably, the end face of the collecting shell used to receive the mud is inclined downward from the inside to the outside along the radial direction of the core tube.

[0020] Preferably, a viewing plate is provided at the upper part of the flow-blocking cavity, and the viewing plate is disposed on the collection shell.

[0021] Preferably, the transparent panel is made of multi-layer laminated acrylic sheet.

[0022] The advantages of this invention compared to the prior art are:

[0023] 1. This invention utilizes a collection unit surrounding the coring cylinder and multiple nested flow-blocking rings. The flow-blocking rings, with their own resilience, adhere tightly to the road surface to form a closed flow-blocking cavity. Simultaneously, the staggered sweeping structure of the guide brush and scraper effectively intercepts the mud generated during coring operations, preventing it from overflowing the work area under gravity and centrifugal force. This avoids mud entering the normal driving lanes of highways during operations, solving the problem of slippery road surfaces caused by mud overflow, which can easily lead to traffic accidents, in traditional water-based dust suppression solutions, thus ensuring highway driving safety.

[0024] 2. The rotating guide brush in the guide unit continuously cleans the road surface at the bottom of the obstruction chamber. Combined with the scraper's pushing action on the mud at the guide slope, this significantly reduces the amount of mud residue on the road surface after operation. Only a small amount of residue at the junction of the obstruction ring and the road surface needs simple cleaning. Compared to the complex process of traditional operations that require closing lanes and using specialized equipment for repeated washing, this reduces the workload and manpower / material resources required for subsequent cleaning, shortens the time the operation occupies the road, and improves the overall efficiency of highway inspection and maintenance.

[0025] 3. By using polyurethane elastomer to make the innermost flow-restricting ring, wear on the flow-restricting ring caused by the rotation of the guide brush is reduced, extending the service life of vulnerable parts of the equipment. The inclined end face of the collection shell, in conjunction with the pump body, enables centralized collection and orderly discharge of slurry, avoiding environmental pollution. Simultaneously, the multi-layered laminated acrylic viewing panel allows workers to observe the operation status in real time while effectively preventing injury from flying debris. These designs not only improve the durability and operational safety of the equipment but also achieve environmentally friendly operation, forming a comprehensive technical advantage that balances practicality and safety. Attached Figure Description

[0026] Figure 1 This is a three-dimensional schematic diagram of a road surface core sampling machine for highway inspection according to the present invention. Figure 1 .

[0027] Figure 2 This invention relates to a road surface core sampling machine for highway inspection. Figure 1 A magnified view of a portion of point A in the middle.

[0028] Figure 3 This is a three-dimensional schematic diagram of a road surface core sampling machine for highway inspection according to the present invention. Figure 2 .

[0029] Figure 4 This is a top view of a road surface coring machine for highway inspection according to the present invention after the moving frame has been removed.

[0030] Figure 5This invention relates to a road surface core sampling machine for highway inspection. Figure 4 Schematic diagram of cross-section at point BB.

[0031] Figure 6 This invention relates to a road surface core sampling machine for highway inspection. Figure 5 A magnified view of a portion of point C.

[0032] Figure 7 This is a partial cross-sectional three-dimensional schematic diagram of a road surface coring machine for highway inspection according to the present invention, after the moving frame has been removed.

[0033] Figure 8 This invention relates to a road surface core sampling machine for highway inspection. Figure 7 A magnified view of a portion of point D.

[0034] The following are the labels in the diagram: 1. Moving frame; 11. Core tube; 111. Water inlet; 12. First rotary actuator; 13. First lifting unit; 2. Collection unit; 21. Collection shell; 211. Guide slope; 212. Slurry outlet; 22. Flow-blocking ring; 23. Guide unit; 231. Guide brush; 232. Drive unit; 2321. Second rotary actuator; 2322. Gear set; 233. Scraper; 24. Perspective plate; 3. Second lifting unit; 31. Second crank handle; 32. Second lead screw. Detailed Implementation

[0035] To further understand the features, technical means, and specific objectives and functions achieved by the present invention, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0036] Reference Figures 1 to 6 A road surface coring machine for highway inspection includes a movable frame 1 and a coring cylinder 11 with a water inlet 111 at the top.

[0037] It also includes a collection unit 2 arranged around the core sampling cylinder 11, the collection unit 2 comprising:

[0038] The collecting shell 21 has an annular structure and is sleeved around the core-collecting cylinder 11 along the axis of the core-collecting cylinder 11. The collecting shell 21 is used to collect mud.

[0039] A flow-blocking ring 22 is disposed on the lower part of the inner ring side of the collection shell 21. The flow-blocking ring 22 has a funnel-shaped structure. The lower part of the flow-blocking ring 22 can contact the road surface and together with the collection shell 21 form a flow-blocking cavity.

[0040] The flow guiding unit 23 is disposed within the flow obstruction cavity, and the flow guiding unit 23 includes:

[0041] Multiple guide brushes 231 are arranged around the axis of the core sampling cylinder 11. The guide brushes 231 can rotate around the axis of the core sampling cylinder 11, and the bottom of the guide brushes 231 can slide and engage with the bottom of the flow obstruction cavity.

[0042] The drive unit 232 is used to drive the guide brush 231 to rotate.

[0043] A first rotary actuator 12 is provided at the upper part of the core sampling cylinder 11. In the prior art, the first rotary actuator 12 often uses a small diesel engine. A first lifting unit 13 for driving the core sampling cylinder 11 and the first rotary actuator 12 to lift and lower synchronously is provided on one side. In the prior art, in order to improve the stability of lifting and lowering the core sampling cylinder 11, the first lifting unit 13 is mainly of the lead screw type. The first lifting unit 13 mainly includes a first crank and a first lead screw. The operator rotates the first crank, which causes the first lead screw to rotate, thereby driving the lifting and lowering of the core sampling cylinder 11.

[0044] The drive unit 232 includes a second rotary driver 2321 and a gear set 2322. The second rotary driver 2321 is vertically disposed on the upper part of the collection shell 21. The gear set 2322 is disposed at the end of the second rotary driver 2321. The gear set 2322 includes a gear and a gear ring. The gear is fixedly disposed on the output end of the second rotary driver 2321. The gear ring is rotatably disposed in the flow-blocking cavity along the axis of the core-collecting cylinder 11. The flow-guiding brush 231 is disposed on the gear ring.

[0045] In highway pavement maintenance or quality inspection, core sampling is a core method for obtaining key parameters such as pavement structural layer thickness and compaction. This requires high-speed rotation of a cylindrical core sampler (11) within the core sampling equipment to drill and cut the pavement to form a complete core sample. To address the problem of excessive dust generated during drilling, such as from asphalt and aggregate breakage, and to prevent dust pollution of the surrounding environment and harm to workers' health, the industry commonly employs water injection for dust suppression. This involves pre-installing a water inlet (111) at the top of the core sampler (11). During operation, a water pump continuously injects water, which, under gravity, flows along the inner wall of the core sampler (11) to the lower drilling area, effectively wetting and encapsulating the drill cuttings.

[0046] However, while this water injection dust suppression method can effectively inhibit dust diffusion, it inevitably causes the water to mix with drill cuttings, forming mud. Because highway surfaces are typically designed with transverse slopes to meet drainage requirements, and coring areas are often temporarily designated with only simple barriers or warning signs, the mud, under the influence of gravity and the centrifugal force of the rotating core cylinder 11, easily overflows beyond the boundaries of the work area. Once the mud flows into the normal driving area of ​​the highway, it forms an uneven, slippery layer on the road surface, significantly reducing the adhesion between the wheels and the road surface. Especially at high speeds, this can easily lead to increased braking distance, skidding, or even rear-end collisions, posing a direct threat to driving safety.

[0047] Meanwhile, post-cleaning work presents numerous challenges, further impacting operational efficiency and maintenance cost control. High-speed highways experience heavy traffic and high speeds, necessitating temporary lane closures for cleaning, causing congestion and requiring additional manpower and resources for traffic management and safety measures. Mud, during its flow, easily seeps into road cracks, adheres to road markings, or solidifies in curbstone gaps, requiring repeated washing and cleaning with specialized equipment such as high-pressure water guns and sweepers, in addition to manual labor – a cumbersome and time-consuming process. Furthermore, incomplete cleaning can lead to hardened mud clumps after being compacted by vehicles, affecting road surface smoothness and potentially accelerating wear, requiring further resources for secondary treatment. This significantly increases the overall workload and reduces maintenance efficiency.

[0048] To avoid the aforementioned issues, this invention optimizes the design of existing road coring machines, preventing excessive mud spillage during operation and avoiding interference with surrounding lanes. Furthermore, it minimizes mud residue on the treated road surface after operation, reducing the workload for subsequent road cleaning. The specific structure and operation of this invention are as follows:

[0049] During operation, the lower part of the mobile frame 1 is equipped with casters with a self-locking structure. The mobile frame 1 is pushed to the position where the operation is to be carried out, and then the casters are locked. A second lifting unit 3 is set on one side of the collection unit 2. The second lifting unit 3 drives the collection unit 2 to descend, so that the bottom of the flow-blocking ring 22 contacts the road surface first. After the bottom of the flow-blocking ring 22 contacts the road surface, it bends and presses the flow-blocking ring 22 onto the ground with its own rebound force. At this time, the flow-blocking ring 22, the road surface, and the collection shell 21 together form the flow-blocking cavity. Then, the first rotary drive 12 drives the core tube 11 to rotate. The operator uses the first lifting unit 13 to drive the core tube 11 to descend. At the same time, the water inlet 111 at the top of the core tube 11 begins to drain water. When the core tube 11 contacts the road surface, the core tube 11 cuts the road surface. The debris generated after the road surface is cut mixes with the water flow to form mud. The mud overflows from the borehole and is confined in the flow-blocking cavity by the flow-blocking ring 22. At this time, the guide brush 231 in the guide unit 23 rotates in the obstruction cavity under the drive of the drive unit 232. The rotating guide brush 231 cleans the mud on the road surface at the bottom of the obstruction cavity. During the cleaning, the mud flows through the obstruction ring 22 into the collection shell 21 under the action of centrifugal force, thereby completing the collection of mud.

[0050] During operation, because the guide brush 231 constantly sweeps the road surface, there is basically no mud residue at the bottom of the flow-blocking cavity. Only a small amount of mud residue remains at the junction of the flow-blocking ring 22 and the road surface, which greatly reduces the amount of subsequent road surface cleaning work.

[0051] Reference Figure 6 and Figure 7 The inner ring side of the collecting shell 21 has a guide slope 211, which has a funnel-shaped structure. A scraper 233 is rotatably arranged on the upper end face of the guide slope 211 around the axis of the core-taking cylinder 11. The scraper 233 slides in cooperation with the upper end face of the guide slope 211.

[0052] The scraper 233 is mounted on the gear ring in the gear set 2322. The rotation of the guide brush 231 sweeps the mud on the road surface to the upper part of the flow-blocking ring 22 and flows through the flow-blocking ring 22 to the flow-blocking slope 211 under the action of centrifugal force. Due to the structural limitations of the guide brush 231, the flow-blocking effect of the guide brush 231 is limited, that is, the centrifugal force generated by the guide brush 231 on the mud is limited. When the guide brush 231 sweeps the mud, some mud will leak out from the gaps of the guide brush 231. This phenomenon becomes more and more obvious as the gravitational potential energy of the mud increases, making it impossible for the mud to smoothly cross the flow-blocking slope 211 and enter the collection shell 21, thus causing the mud to stagnate at the bottom of the flow-blocking cavity. After the scraper 233 is installed at the upper end of the guide slope 211, the scraper 233 slides with the guide slope 211, which prevents the mud from leaking out when it is pushed by the scraper 233. This ensures that the mud entering the guide slope 211 can obtain sufficient centrifugal force when it is pushed by the scraper 233, so that the mud can smoothly enter the collection shell 21 under the action of centrifugal force when it enters the guide slope 211, and avoids the mud from accumulating at the bottom of the flow obstruction cavity.

[0053] Reference Figure 6 and Figure 7 The guide brush 231 and the scraper 233 are staggered. When the guide brush 231 rotates, it forms a first sweeping area. When the scraper 233 rotates, it forms a second sweeping area with the same shape as the end face of the guide slope 211. The first sweeping area and the second sweeping area intersect.

[0054] The intersection of the first and second sweeping zones allows the guide brush 231 to provide more guidance for the mud when it rotates. This is because the guide brush 231 sweeps the mud when it rotates, and the mud is swept from the ground to the flow-blocking ring 22 under the action of centrifugal force, so that it can smoothly enter the guide slope 211. Otherwise, if the first and second sweeping zones are tangent, the mud that leaves the first sweeping zone will fall back quickly after its own gravity overcomes the centrifugal force, resulting in the mud staying in the second sweeping zone for too short a time, and the scraper 233 will not be able to provide effective driving force for the mud.

[0055] Reference Figure 1 and Figure 2 A second lifting unit 3 is provided on one side of the collecting unit 2 for driving the collecting unit 2 to rise and fall.

[0056] The second lifting unit 3 is a screw-type structure, including a second crank 31 and a second screw 32. The second crank 31 is fixedly connected to the second screw 32. The second screw 32 is vertically rotatably mounted on the moving frame 1 and vertically passes through the collection shell 21. The second screw 32 is threadedly engaged with the collection shell 21. By rotating the second crank 31, the second screw 32 is rotated, thereby causing the collection shell 21 to rise and fall, thus realizing the overall lifting and lowering of the collection unit 2.

[0057] Reference Figure 6 Multiple flow-blocking rings 22 are nested along the radial direction of the core-taking cylinder 11.

[0058] By setting up multiple nested flow-blocking rings 22, each flow-blocking ring 22 can form a flow-blocking layer. The combined effect of multiple flow-blocking layers can prevent mud from overflowing between the flow-blocking ring 22 and the road surface.

[0059] It is worth noting that, due to the influence of the road surface texture, slight mud seepage may still occur after setting multiple flow-blocking rings 22. However, the amount of seepage is limited, and most of the mud enters the collection shell 21 under the action of the flow-guiding unit 23. When constructing a semi-enclosed highway, the slightly seeping mud will not invade the normal driving lane. At the same time, since the amount of seeping mud is small, after the core sampling work is completed, it can be determined whether the road surface needs to be cleaned according to the actual situation. Even if cleaning is required, the amount of cleaning work required after the road surface core sampling machine of this invention is far lower than the amount of traditional cleaning work.

[0060] Reference Figure 6 The innermost flow-blocking ring 22 is made of wear-resistant elastic material.

[0061] For example, polyurethane elastomer, also known as wear-resistant rubber, is used to make the innermost flow-blocking ring 22. This not only achieves the initial interception of mud, but also reduces the wear of the flow-blocking ring 22 by the flow-guiding brush 231 when it rotates, thus extending the service life of the flow-blocking ring 22.

[0062] Reference Figure 7 The collecting shell 21 has a slurry discharge port 212 on its side wall, and a pump body connected to the slurry discharge port 212 is provided on one side of the collecting shell 21.

[0063] The pump body is used to extract the mud from the collection shell 21, and the extracted mud is collected in a container.

[0064] Reference Figure 7 The end face of the collecting shell 21 used to receive the mud is inclined downward from the inside to the outside along the radial direction of the core tube 11.

[0065] The end face of the collecting shell 21 used to receive the mud is inclined downward from the inside to the outside along the radial direction of the core cylinder 11, which ensures that the mud after passing the guide slope 211 can be guided to be discharged from the discharge port 212 when it falls into the collecting shell 21.

[0066] Reference Figure 4 , Figure 7 and Figure 8 A transparent plate 24 is provided at the upper part of the flow obstruction cavity, and the transparent plate 24 is disposed on the collection shell 21.

[0067] By installing a viewing plate 24 at the top of the flow-blocking cavity, it is easier for workers to judge the working status of the core-taking cylinder 11 during operation.

[0068] Reference Figure 8 The transparent panel 24 is made of multi-layer laminated acrylic sheet.

[0069] The transparent panel 24 is made of multi-layer laminated acrylic sheet, which improves the strength of the transparent panel 24 and avoids the situation where fragments fly and injure people when the core tube 11 breaks accidentally.

[0070] Working Principle: In the preparation stage of coring operation, before the operation, the staff pushes the road coring machine to the designated inspection position on the highway using the casters at the bottom of the mobile frame 1. The self-locking structure of the casters locks the equipment to prevent displacement during the operation. Then, the second lifting unit 3 on one side of the collection unit 2 is operated. The second lifting unit 3 adopts a screw-type structure. By rotating the second crank 31, the second screw 32 is driven to rotate, thereby driving the collection unit 2, which is sleeved around the coring cylinder 11, to descend as a whole. When the flow-blocking ring 22 on the lower inner ring side of the collection shell 21 contacts the road surface, the innermost layer of the multi-layered nested flow-blocking ring 22, which is made of polyurethane elastomer wear-resistant material, tightly adheres to the road surface with its own rebound force, forming a well-sealed flow-blocking cavity together with the collection shell 21. At the same time, the multi-layered laminated acrylic plate transparent plate 24 on the upper part of the flow-blocking cavity allows the staff to observe the operation status in real time and ensure safety.

[0071] During the simultaneous core sampling and dust suppression operation, after preparation, the first rotary actuator 12 at the top of the core sampling cylinder 11, typically powered by a small diesel engine, is started to drive the core sampling cylinder 11 to rotate at high speed. Workers operate the first lifting unit 13 via a screw-type crank, causing the core sampling cylinder 11 and the first rotary actuator 12 to descend smoothly and synchronously. Simultaneously, water continuously flows from the water inlet 111 at the top of the core sampling cylinder 11. The water flows along the inner wall of the core sampling cylinder 11 under gravity to the lower drilling area, mixing with the debris generated from road surface cutting to form mud, thus achieving dust suppression. During the rotating cutting process, the core sampling cylinder 11 remains in the central area of ​​the flow-blocking chamber. The multi-layered flow-blocking structure of the flow-blocking ring 22 effectively prevents mud from overflowing, with only minor leakage due to road surface texture possible, which will not intrude into the normal driving area.

[0072] Simultaneously with the coring operation, the flow guiding unit 23 is activated, and the drive unit 232 rotates multiple flow guiding brushes 231 arranged around the axis of the coring cylinder 11. The bottom of the flow guiding brushes 231 slides against the road surface at the bottom of the flow-blocking cavity, sweeping away the residual mud on the road surface to the outside. Because the flow guiding brushes 231 and the scrapers 233 on the inner ring side flow guiding slope 211 of the collection shell 21 are staggered, the sweeping areas formed by their rotation intersect each other. The mud pushed by the flow guiding brushes 231 is further propelled by the centrifugal force generated by the scrapers 233, smoothly crossing the funnel-shaped flow guiding slope 211 and entering the collection shell 21, preventing the mud from accumulating at the bottom of the flow-blocking cavity. The end face of the collection shell 21 that receives the mud is designed to be inclined from the inside out, guiding the mud to the discharge port 212 on the side wall. The mud is then pumped out and collected into a special container by the pump body connected to the discharge port 212, realizing centralized treatment of the mud.

[0073] In the final stage of the operation, after the core sampling cylinder 11 has completed drilling to the preset depth, it is driven to rise by the first lifting unit 13, detaching from the road surface and retrieving the complete core sample. At this time, because the guide brush 231 continuously cleans the road surface during the operation, only a small amount of mud residue remains at the bottom of the obstruction chamber at the junction of the obstruction ring 22 and the road surface, eliminating the need for a complex cleaning process. The staff shuts off all drive units 232 and the pump body, raises the collection unit 2 via the second lifting unit 3, unlocks the omnidirectional wheels to move the equipment, and simply cleans up the small amount of residual mud as needed to complete the entire operation. Compared with traditional core sampling equipment, this process significantly reduces the amount of road surface cleaning work and avoids mud pollution and driving safety hazards.

[0074] The above embodiments only illustrate one or more implementations of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of protection of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. A road surface coring machine for highway inspection, comprising a movable frame (1) and a coring cylinder (11) with a water inlet (111) at the upper end. Its features are, It also includes a collection unit (2) arranged around the core sampling cylinder (11), the collection unit (2) comprising: The collecting shell (21) has an annular structure and is sleeved around the core tube (11) along the axis of the core tube (11). The collecting shell (21) is used to collect mud. A flow-blocking ring (22) is disposed on the lower part of the inner ring side of the collection shell (21). The flow-blocking ring (22) has a funnel-shaped structure. The lower part of the flow-blocking ring (22) can contact the road surface and form a flow-blocking cavity together with the collection shell (21). The flow guiding unit (23) is disposed within the flow obstruction cavity, and the flow guiding unit (23) includes: Multiple guide brushes (231) are arranged around the axis of the core sampling cylinder (11). The guide brushes (231) can rotate around the axis of the core sampling cylinder (11). The bottom of the guide brushes (231) can slide and cooperate with the bottom of the flow obstruction cavity. The drive unit (232) is used to drive the guide brush (231) to rotate.

2. The road surface coring machine for highway inspection according to claim 1, characterized in that, The inner ring side of the collection shell (21) has a guide slope (211), which has a funnel-shaped structure. A scraper (233) is rotatably arranged on the upper end face of the guide slope (211) around the axis of the core-taking cylinder (11). The scraper (233) slides in cooperation with the upper end face of the guide slope (211).

3. A road surface core sampling machine for highway inspection according to claim 2, characterized in that, The guide brush (231) and the scraper (233) are staggered. When the guide brush (231) rotates, it forms a first sweeping area. When the scraper (233) rotates, it forms a second sweeping area with the same shape as the end face of the guide slope (211). The first sweeping area and the second sweeping area intersect.

4. A road surface core sampling machine for highway inspection according to claim 1, characterized in that, A second lifting unit (3) is provided on one side of the collecting unit (2) for driving the collecting unit (2) to rise and fall.

5. A road surface core sampling machine for highway inspection according to claim 1, characterized in that, Multiple flow-blocking rings (22) are nested along the radial direction of the core-taking cylinder (11).

6. A road surface core sampling machine for highway inspection according to claim 5, characterized in that, The innermost flow-blocking ring (22) is made of wear-resistant elastic material.

7. A road surface core sampling machine for highway inspection according to any one of claims 1 to 3, characterized in that, The collection shell (21) has a slurry discharge port (212) on its side wall, and a pump body connected to the slurry discharge port (212) is provided on one side of the collection shell (21).

8. A road surface core sampling machine for highway inspection according to claim 7, characterized in that, The end face of the collecting shell (21) used to receive the mud is inclined downward from the inside to the outside along the radial direction of the core tube (11).

9. A road surface core sampling machine for highway inspection according to claim 1, characterized in that, A viewing plate (24) is provided on the upper part of the flow-blocking cavity, and the viewing plate (24) is provided on the collection shell (21).

10. A road surface core sampling machine for highway inspection according to claim 9, characterized in that, The transparent panel (24) is made of multi-layer laminated acrylic sheet.

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