An asphalt pavement compaction testing device

Abstract

This utility model relates to the field of asphalt pavement testing technology, specifically to an asphalt pavement compaction testing device. The device comprises a vehicle body with a square hole, inside which a nucleus-free density meter is installed. A connecting rod is connected to the outside of the nucleus-free density meter, and connecting blocks are detachably connected to both sides of the connecting rod. A support frame is installed on the top of the vehicle body, and two lifting components are symmetrically arranged inside the support frame, with the lifting components drivingly connected to the connecting blocks. A handle is fixedly installed at one end of the vehicle body, and a horizontal fixing plate is installed above the handle. A controller is installed on the fixing plate, and the controller is connected to the nucleus-free density meter via a wire. A traveling component is installed at the bottom of the vehicle body. This utility model can detect the compaction degree of asphalt pavement without damaging the asphalt pavement; it also reduces the time required for detecting asphalt pavement compaction, enabling rapid detection and improving testing efficiency.

Description

Technical Field

[0001] This utility model relates to the field of asphalt pavement testing technology, specifically to an asphalt pavement compaction testing device. Background Technology

[0002] Asphalt pavement is a road surface layer constructed from asphalt mixtures. It features smoothness, wear resistance, and skid resistance, and is one of the main forms of modern highways, urban roads, airport runways, and other transportation infrastructure. Its core principle is the bonding between asphalt (a petroleum-derived binder) and mineral aggregates (crushed stone, sand, etc.) to form a high-strength, durable, and flexible pavement structure. During the construction of asphalt pavement, compaction is required, followed by compaction degree testing. Insufficient compaction leads to excessively high porosity in the asphalt mixture (greater than 7%), which can easily cause permanent deformations such as rutting and subsidence under vehicle loads. Sufficient compaction of the asphalt pavement effectively transfers the load to the base layer, preventing localized stress concentration that could lead to cracks such as alligator cracking and fatigue cracking.

[0003] Existing technologies typically use borehole sampling to test the compaction degree of compacted asphalt pavement. While this method can achieve the effect of testing the compaction degree of asphalt pavement, the testing process is time-consuming and cannot quickly test the compaction degree of asphalt pavement, resulting in low testing efficiency. Furthermore, it can damage the constructed asphalt pavement, and after the compaction degree test is completed, the asphalt pavement needs to be reconstructed, reducing work efficiency. Summary of the Invention

[0004] This invention addresses the problems of time-consuming and damaging drilling methods used in existing asphalt pavement compaction testing, by providing an asphalt pavement compaction testing device. This device can test the compaction of asphalt pavement without damaging it, eliminating the need for drilling and thus avoiding damage to the constructed asphalt pavement. It also reduces the time required for testing compaction, enabling rapid testing and improving efficiency.

[0005] To achieve the above objectives, the technical solution of this utility model is: an asphalt pavement compaction testing device, comprising a vehicle body with a square hole on the vehicle body, a nucleus-free density meter installed inside the square hole, a connecting rod connected to the outside of the nucleus-free density meter, and connecting blocks detachably connected to both sides of the connecting rod; a support frame is provided on the top of the vehicle body, and two lifting components are symmetrically arranged inside the support frame, the lifting components being driven to the connecting blocks, and the connecting blocks being detachably connected to the connecting rod to facilitate the disassembly and maintenance of the nucleus-free density meter; the lifting components can drive the connecting blocks to move up and down, so that the connecting blocks drive the nucleus-free density meter to move up and down via the connecting rod; wherein the nucleus-free density meter can quickly detect the compaction of asphalt pavement, and can complete the compaction test even when the asphalt pavement is damaged.

[0006] A handle is fixedly installed at one end of the vehicle body. A horizontally positioned fixed plate is installed above the handle, and a controller is installed on the fixed plate. The controller is connected to the nucleus-free density meter via wires. A traveling assembly is installed at the bottom of the vehicle body. The nucleus-free density meter and the controller are connected by wires so that the controller can control the operation of the nucleus-free density meter. With the help of the traveling assembly, the operator can push the vehicle body forward by using the handle.

[0007] Furthermore, the connecting rod has an inverted "U" shape. The lower end of the vertical part of the connecting rod is connected to the nucleus-free density meter, and slots are provided on both sides of the upper part of the connecting rod. By connecting the vertical part of the connecting rod to the nucleus-free density meter, the nucleus-free density meter is suspended in the square hole, thereby facilitating the contact between the radar disk at the bottom of the nucleus-free density meter and the asphalt pavement.

[0008] Furthermore, a limiting groove is formed on the top of the connecting block, and an opening communicating with the limiting groove is formed on the outer side of the connecting block; an L-shaped locking block is slidably disposed inside the limiting groove, and the horizontal part of the L-shaped locking block passes through the opening and is inserted into the locking groove. By locking the horizontal part of the L-shaped locking block into the locking groove, the connecting block and the connecting rod are limited and fixed, so as to facilitate the assembly and disassembly of the nucleus-free density meter.

[0009] Furthermore, a spring is also provided inside the limiting groove, with both ends of the spring connected to the L-shaped locking block and the connecting block, respectively. The elastic force of the spring on the L-shaped locking block ensures that the horizontal portion of the L-shaped locking block is engaged within the groove.

[0010] Furthermore, the lifting assembly includes a motor and a lead screw. The upper and lower ends of the lead screw are rotatably connected to the support frame and the vehicle body, respectively, and the lead screw is drively connected to the connecting block. The motor is located on the top of the support frame, and its output end is connected to the lead screw. The output end of the motor drives the lead screw to rotate, and the rotation of the lead screw drives the connecting block to move up and down, so that the connecting block drives the nucleus-free density meter to move up and down via the connecting rod.

[0011] Furthermore, guide holes are provided on both sides of the support frame, and the connecting block is slidably disposed in the guide holes, which guide the lifting and lowering movement of the connecting block.

[0012] Furthermore, the number of the traveling components is two, and the traveling components include ear plates, axles and wheels. Two ear plates are symmetrically arranged at the bottom of the vehicle body, and axle is arranged between the two ear plates. The two ends of the axle pass through the ear plates and are rotatably connected to the wheels. The vehicle body can move through the axle and the wheels.

[0013] The beneficial effects of this utility model through the above technical solution are as follows: 1. This utility model has a reasonable structure and good performance. Compared with the existing technology of drilling and sampling to test the compaction degree of asphalt pavement, it can test the compaction degree of asphalt pavement without damaging the asphalt pavement. It eliminates the need for drilling and testing the asphalt pavement, effectively avoiding damage to the constructed asphalt pavement. At the same time, it reduces the time required to test the compaction degree of asphalt pavement, enabling rapid testing and improving testing efficiency and work efficiency.

[0014] 2. This utility model uses a lifting assembly to drive the connecting block to move up and down, so that the connecting block drives the nucleus-free density meter to move up and down through the connecting rod. This ensures that the radar disc at the bottom of the nucleus-free density meter is in full contact with the asphalt pavement. The nucleus-free density meter detects the average density, compaction degree, and porosity of the asphalt pavement, thereby realizing the detection of the compaction degree of the asphalt pavement. It is easy to find the non-uniformity, segregation, and low-density areas of the asphalt pavement, so as to facilitate the timely resolution of problems before the road repair is completed.

[0015] This utility model allows for the detachable connection between the connecting block and the connecting rod, facilitating the disassembly and maintenance of the nucleus-free density meter. Specifically, the spring within the limiting groove supports the L-shaped locking block through its force, causing the horizontal portion of the L-shaped locking block to engage within the slot, thus limiting and fixing the connecting block and the connecting rod. During the installation and disassembly of the nucleus-free density meter, the spring automatically resets the L-shaped locking block. When disassembly and maintenance of the nucleus-free density meter is required, pulling the L-shaped locking block outward causes its horizontal portion to slide out of the slot of the connecting rod, thereby enabling the disassembly of the nucleus-free density meter. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of an asphalt pavement compaction testing device according to this utility model. Figure 1 ; Figure 2 This is a structural schematic diagram of the lifting assembly and the nucleus-free density meter of this utility model; Figure 3This is a structural schematic diagram of the connecting block and connecting rod of this utility model; Figure 4 This is a schematic diagram of the structure of an asphalt pavement compaction testing device according to this utility model. Figure 2 (Excluding the lifting mechanism).

[0017] The following numbers are used in the attached diagram: 1 is the vehicle body, 101 is the square hole, 102 is the support frame, 2 is the ear plate, 3 is the rotating shaft, 4 is the wheel, 5 is the nucleus-free density meter, 6 is the connecting rod, 601 is the slot, 7 is the lead screw, 8 is the motor, 9 is the connecting block, 901 is the limiting slide, 10 is the spring, 11 is the L-shaped locking block, 12 is the handle, 13 is the fixing plate, 14 is the controller, and 15 is the wire. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings and specific embodiments: like Figures 1-4 As shown, an asphalt pavement compaction testing device includes a vehicle body 1, on which a square hole 101 is provided. A nucleus-free density meter 5 is installed inside the square hole 101. A connecting rod 6 is connected to the outside of the nucleus-free density meter 5. Connecting blocks 9 are detachably connected to both sides of the connecting rod 6. A support frame 102 is provided on the top of the vehicle body 1. Two lifting components are symmetrically arranged inside the support frame 102. The lifting components are drivenly connected to the connecting blocks 9. In this embodiment, the square hole 101 is located in the middle of the vehicle body 1. The size of the square hole 101 is larger than that of the nucleus-free density meter 5. The design structure of the square hole 101 provides displacement space for the nucleus-free density meter 5, so that the radar disk at the bottom of the nucleus-free density meter 5 can contact the asphalt pavement. The connecting block 9 is detachably connected to the connecting rod 6 on the outside of the nucleus-free density meter 5, so as to facilitate the disassembly and maintenance of the nucleus-free density meter 5. The support frame 102 has an inverted "U" shape. The vertical part of the support frame 102 is fixedly installed on the top of the vehicle body 1. The lifting component can drive the connecting block 9 to move up and down. The connecting block 9 drives the nucleus-free density meter 5 to move up and down through the connecting rod 6, so that the radar disk at the bottom of the nucleus-free density meter 5 can fully contact the ground. By starting the nucleus-free density meter 5, the average density, compaction degree and porosity of the asphalt pavement can be automatically calculated.

[0019] A handle 12 is fixedly installed at one end of the vehicle body 1. A horizontally positioned fixed plate 13 is installed above the handle 12. A controller 14 is installed on the fixed plate 13. The controller 14 is connected to the nucleus-free density meter 5 via a wire 15. A travel assembly is installed at the bottom of the vehicle body 1. In this embodiment, the handle 12 facilitates the movement of the vehicle body 1 by the operator. The two ends of the fixed plate 13 are fixedly fitted onto the upper vertical part of the handle 12. The controller 14 is mounted on the fixed plate 13 via a support column. The controller 14 also includes a display screen. The controller 14 and the nucleus-free density meter 5 are connected via wires 15 to control the operation of the nucleus-free density meter 5. Travel assemblies are installed at the bottom of both ends of the vehicle body 1 to facilitate the movement of the vehicle body 1.

[0020] The connecting rod 6 has an inverted "U" shape. The lower end of the vertical part of the connecting rod 6 is connected to the nucleus-free density meter 5. The upper two sides of the connecting rod 6 are provided with slots 601. In this embodiment, the nucleus-free density meter 5 is fixedly installed on both sides. The lower end of the vertical part of the connecting rod 6 is rotatably fitted onto the fixed shaft. The nucleus-free density meter 5 is suspended in the square hole 101 by the connecting rod 6, so that when the lifting assembly adjusts the height of the nucleus-free density meter 5, the radar disk at the bottom of the nucleus-free density meter 5 can contact the asphalt road surface.

[0021] The top of the connecting block 9 has a limiting groove 901, and the outer side of the connecting block 9 has an opening communicating with the limiting groove 901. An L-shaped locking block 11 is slidably disposed inside the limiting groove 901, and the horizontal part of the L-shaped locking block 11 passes through the opening and is inserted into the locking groove 601. In this embodiment, the limiting groove 901 provides an installation position for the L-shaped locking block 11 and the spring 10. The design structure of the opening allows the horizontal part of the L-shaped locking block 11 to extend to the outside of the limiting groove 901. By inserting the horizontal part of the L-shaped locking block 11 through the opening into the locking groove 601, the connecting block 9 and the connecting rod 6 are limited and fixed, which facilitates the assembly and disassembly of the nucleus-free density meter 5. The vertical part of the L-shaped locking block 11 extends upward to the outside of the limiting groove 901.

[0022] The limiting slide groove 901 is also equipped with a spring 10, the two ends of which are connected to the L-shaped locking block 11 and the connecting block 9, respectively. In this embodiment, the spring 10 provides an elastic force to the L-shaped locking block 11, ensuring that the horizontal part of the L-shaped locking block 11 can pass through the opening and be inserted into the locking groove 601. During installation or disassembly, the spring 10 automatically resets the L-shaped locking block 11.

[0023] The lifting assembly includes a motor 8 and a lead screw 7. The upper and lower ends of the lead screw 7 are rotatably connected to the support frame 102 and the vehicle body 1, respectively, and the lead screw 7 is drive-connected to the connecting block 9. The motor 8 is located on the top of the support frame 102, and its output end is connected to the lead screw 7. In this embodiment, the two ends of the lead screw 7 are rotatably connected to the support frame 102 and the vehicle body 1 through bearings, and the controller 14 can also control the motor 8 to work. When the motor 8 is started, the output end of the motor 8 drives the lead screw 7 to rotate, and the lead screw 7 drives the connecting block 9 to perform lifting and lowering movements. The connecting block 9 drives the nucleus-free density meter 5 to perform lifting and lowering adjustments through the connecting rod 6.

[0024] Guide sliding holes are provided on both sides of the support frame 102, and the connecting block 9 is slidably disposed in the guide sliding holes. In this embodiment, the lead screw 7 is rotatably installed in the guide sliding hole, and the connecting block 9 moves up and down in the guide sliding hole. The guide sliding hole 9 guides the up and down movement of the connecting block 9.

[0025] The number of the traveling components is two, each including a lug plate 2, a pivot 3, and a wheel 4. Two lug plates 2 are symmetrically arranged on the bottom of the vehicle body 1, and a pivot 3 is positioned between the two lug plates 2. Both ends of the pivot 3 pass through the lug plates 2 and are rotatably connected to the wheel 4. In this embodiment, the wheel 4 is rotatably connected to the pivot 3 via bearings. The pivot 3 and the wheel 4 facilitate the movement of the vehicle body 1 by the operator pushing it using the handle 12.

[0026] The working principle of this utility model is as follows: When it is necessary to test the compaction degree of the compacted asphalt pavement, the staff pushes the vehicle body 1 through the handle 12, causing the wheels 4 of the traveling component to rotate. The movement of the vehicle body 1 drives the non-nuclear density meter 5 to move simultaneously, randomly moving the non-nuclear density meter 5 to any position on the asphalt pavement for compaction degree testing. The controller 14 starts the motors 8 of the two lifting components. The output end of the motor 8 drives the lead screw 7 to rotate. The lead screw 7 drives the connecting block 9 to move downward. The connecting block 9 drives the non-nuclear density meter 5 to move downward through the connecting rod 6, adjusting the non-nuclear density meter 5 to make its bottom radar chassis fully contact the asphalt pavement. Then, the controller 14 starts the non-nuclear density meter 5, which automatically calculates the average density, compaction degree and porosity of the asphalt pavement, making it easy to detect the non-uniformity, segregation and low density areas of the asphalt pavement, thus realizing the detection of the compaction degree of the asphalt pavement. After the inspection is completed, the motors 8 of the two lifting components are restarted. The output of the motors 8 drives the lead screw 7 to rotate. The lead screw 7 drives the connecting block 9 to move upward, causing the two connecting blocks 9 to drive the nucleus-free density meter 5 to rise through the connecting rod 6. The nucleus-free density meter 5 moves upward so that its bottom radar chassis leaves the asphalt road surface. Then the vehicle body 1 is moved to change position, and the above operation is repeated to inspect multiple positions on the asphalt road surface.

[0027] The nucleus-free density meter 5 requires regular maintenance for long-term use. When disassembling the nucleus-free density meter 5, simply pull the L-shaped locking blocks 11 on the two connecting blocks 9 outwards so that the horizontal part of the L-shaped locking blocks 11 disengages from the slot 601 on the side of the connecting rod 6. Then, remove the connecting rod 6 and the nucleus-free density meter 5 for maintenance. After maintenance, pull the L-shaped locking blocks 11 on the two connecting blocks 9 outwards again. After the slot 601 on the side of the connecting rod 6 aligns with the opening on the connecting block 9, release the two L-shaped locking blocks 11. Under the elastic action of the spring 10, the L-shaped locking blocks 11 will reset and the horizontal part of the L-shaped locking blocks 11 will re-insert into the slot 601 on the side of the connecting rod 6, thus completing the limiting and fixing of the connecting rod 6 and the connecting block 9.

[0028] The embodiments described above are merely preferred embodiments of the utility model and are not intended to limit the scope of the utility model. Therefore, all equivalent changes or modifications made to the technical solutions described in the scope of the utility model patent application should be included within the scope of the utility model patent application.

Claims

1. A device for testing the compaction degree of asphalt pavement, characterized in that, The vehicle includes a vehicle body (1), on which a square hole (101) is provided. A nucleus-free density meter (5) is installed inside the square hole (101). A connecting rod (6) is connected to the outside of the nucleus-free density meter (5). Connecting blocks (9) are detachably connected to both sides of the connecting rod (6). A support frame (102) is provided on the top of the vehicle body (1). Two lifting components are symmetrically arranged inside the support frame (102). The lifting components are connected to the connecting blocks (9) in a transmission manner. A handle (12) is fixedly installed at one end of the vehicle body (1). A horizontal fixed plate (13) is installed on the upper part of the handle (12). A controller (14) is installed on the fixed plate (13). The controller (14) is connected to the nucleus-free density meter (5) through a wire (15). A travel component is installed at the bottom of the vehicle body (1).

2. The asphalt pavement compaction testing device according to claim 1, characterized in that, The connecting rod (6) has an inverted "U" shape. The lower end of the vertical part of the connecting rod (6) is connected to the nucleus-free density meter (5). The upper two sides of the connecting rod (6) are provided with slots (601).

3. The asphalt pavement compaction testing device according to claim 2, characterized in that, The top of the connecting block (9) is provided with a limiting groove (901), and the outer side of the connecting block (9) is provided with an opening that communicates with the limiting groove (901); an L-shaped locking block (11) is slidably arranged inside the limiting groove (901), and the horizontal part of the L-shaped locking block (11) passes through the opening and is inserted into the locking groove (601).

4. The asphalt pavement compaction testing device according to claim 3, characterized in that, The limiting slide (901) is also provided with a spring (10), and the two ends of the spring (10) are respectively connected to the L-shaped card block (11) and the connecting block (9).

5. The asphalt pavement compaction testing device according to claim 1, characterized in that, The lifting assembly includes a motor (8) and a lead screw (7). The upper and lower ends of the lead screw (7) are rotatably connected to the support frame (102) and the vehicle body (1) respectively. The lead screw (7) is connected to the connecting block (9) in a transmission manner. The motor (8) is located on the top of the support frame (102) and its output end is connected to the lead screw (7).

6. The asphalt pavement compaction testing device according to claim 1, characterized in that, The support frame (102) has guide sliding holes on both sides, and the connecting block (9) is slidably disposed in the guide sliding holes.

7. The asphalt pavement compaction testing device according to claim 1, characterized in that, The number of the traveling components is two. The traveling components include ear plates (2), a rotating shaft (3) and wheels (4). Two ear plates (2) are symmetrically arranged at the bottom of the vehicle body (1). A rotating shaft (3) is arranged between the two ear plates (2). The two ends of the rotating shaft (3) pass through the ear plates (2) and are rotatably connected to the wheels (4).

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