Asphalt pavement impact test device with long service life and high RAP
By introducing buffer and clamping components into the impact testing device, the problems of large vibration and difficulty in fixing traditional devices are solved, achieving more stable testing and more efficient sample fixing, and ensuring the accuracy of measurement data.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-15
- Publication Date
- 2026-04-03
AI Technical Summary
Traditional asphalt pavement impact testing devices generate significant vibrations during drop hammer impacts, affecting the device's lifespan and the accuracy of measurement data, making it difficult to accurately assess the impact resistance of long-life, high-RAP asphalt pavements.
The system employs a buffer assembly and a clamping assembly. The buffer assembly includes springs and dampers to reduce impact vibrations, while the clamping assembly uses hydraulic rods and clamps to automatically fix the sample, reducing the impact of vibration on the test and improving fixation efficiency.
It effectively reduces the impact of impact vibration on the device, improves the stability of the test and the efficiency of sample fixation, and ensures the accuracy of measurement data.
Smart Images
Figure CN224081386U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of impact testing devices, and in particular to a long-life, high-RAP asphalt pavement impact testing device. Background Technology
[0002] In the field of road engineering, long-life, high-RAP asphalt pavement is increasingly widely used due to its ability to effectively utilize recycled asphalt pavement materials, achieving resource recycling and cost reduction. To accurately assess its ability to resist impact loads in actual use and ensure road durability and safety, impact testing equipment has become essential. This equipment can simulate the impacts experienced by actual roads, providing crucial data support for optimizing pavement material performance and controlling project quality.
[0003] Currently, traditional asphalt pavement impact testing devices mostly employ a simple drop hammer structure. The drop hammer falls freely under gravity, impacting the pavement sample, and its impact resistance is assessed by observing the damage to the sample. The measurement section primarily relies on basic displacement and force sensors to convert physical quantities into electrical signals, which are then transmitted to data acquisition equipment for analysis and recording. Control is typically achieved through manual adjustment of the drop hammer height and simple circuit control to start and stop the testing process.
[0004] However, in practical use, traditional devices generate significant vibrations when the drop hammer impacts the sample. This vibration not only damages the structure of the testing device itself, affecting its service life, but also interferes with the accuracy of the measurement data, making it difficult to accurately assess the impact resistance of long-life high-RAP asphalt pavement. Therefore, a long-life high-RAP asphalt pavement impact testing device is proposed to solve the above problems. Utility Model Content
[0005] To overcome the above shortcomings, this utility model provides a long-life, high-RAP asphalt pavement impact testing device, which aims to improve the problem of large impact vibration and difficulty in timely stabilization of the device in the existing impact testing technology.
[0006] To achieve the above objectives, the present invention adopts the following technical solution:
[0007] A long-life high-RAP asphalt pavement impact testing device includes a base, a fixed frame fixedly connected to the side wall of the base, a fixed rod fixedly connected inside the fixed frame, a drop hammer device slidably connected to the side wall of the fixed rod, a placement frame slidably connected to the side wall of the fixed rod, a clamping component provided inside the placement frame, and a buffer component provided at the bottom of the placement frame.
[0008] The buffer assembly includes a fixed frame, which is slidably connected to the side wall of the fixed rod. A sliding rod is fixedly connected inside the fixed frame, and a slider is slidably connected to the side wall of the sliding rod. A spring is sleeved on the side wall of the sliding rod. A connecting frame is fixedly connected to the side wall of the base. A rotating rod is rotatably connected inside the connecting frame. The side wall of the rotating rod is rotatably connected to the side wall of the slider. A damper is fixedly installed between the placement frame and the base.
[0009] As a further description of the above technical solution:
[0010] The clamping assembly includes a rotating frame, and a horizontal groove is provided inside the placement frame. The rotating frame is rotatably connected inside the placement frame.
[0011] As a further description of the above technical solution:
[0012] The rotating frame is rotatably connected to a connecting rod on its side wall, and a fixing column is fixedly connected inside the placement frame.
[0013] As a further description of the above technical solution:
[0014] The fixed column sidewall is slidably connected to the slide plate, and the connecting rod sidewall is rotatably connected to the slide plate sidewall.
[0015] As a further description of the above technical solution:
[0016] The sidewall of the slide plate is fixedly connected to a fixing block, and the sidewall of the fixing block is slidably connected inside the transverse groove.
[0017] As a further description of the above technical solution:
[0018] A clamping plate is fixedly connected to the side wall of the fixing block, and a rubber pad is fixedly connected to the side wall of the clamping plate.
[0019] As a further description of the above technical solution:
[0020] A hydraulic rod is fixedly connected to the bottom of the placement frame, and a connecting block is fixedly connected to the output end of the hydraulic rod. The side wall of the connecting block is slidably connected inside the placement frame, and the side wall of the connecting block is fixedly connected to one side of the slide plate side wall.
[0021] As a further description of the above technical solution:
[0022] One end of the spring is fixedly connected inside the fixed frame, and the other end of the spring is fixedly connected to the side wall of the slider.
[0023] This utility model has the following beneficial effects:
[0024] 1. In this utility model, when impacted by the drop hammer device, the placement frame moves the connecting frame, the rotating rod pushes the slider to slide on the sliding rod to compress the spring, the spring initially buffers, the damper consumes energy, and the placement frame quickly stabilizes, reducing the impact on the test and the base. This solves the problem of large impact vibration and difficulty in stabilizing the device in a timely manner during impact testing. The above technical solution improves the stability of the testing device.
[0025] 2. In this utility model, the sample is placed on the placement frame, the hydraulic rod is activated to push the sliding plate to slide on the side wall of the fixed column, which drives the connecting rod and the rotating frame to rotate, so that the two sliding plates on both sides move towards each other, the fixed block slides in the transverse groove, the clamping plate holds the sample, and the rubber pad increases the friction to fix the sample. This solves the problem that the traditional method of fixing the sample by twisting the bolt to drive the clamping plate to move is more troublesome and thus affects the work efficiency. The above technical solution improves the efficiency of sample fixing. Attached Figure Description
[0026] Figure 1 This is a three-dimensional schematic diagram of a long-life, high-RAP asphalt pavement impact testing device proposed in this utility model.
[0027] Figure 2 This is a schematic diagram of the internal structure of the mounting frame of a long-life, high-RAP asphalt pavement impact testing device proposed in this utility model.
[0028] Figure 3 This is a schematic diagram of the support frame structure of a long-life, high-RAP asphalt pavement impact testing device proposed in this utility model.
[0029] Figure 4 This is a schematic diagram of the internal structure of the placement frame of a long-life, high-RAP asphalt pavement impact testing device proposed in this utility model.
[0030] Legend:
[0031] 1. Base; 2. Fixing frame; 3. Fixing rod; 4. Drop hammer device; 5. Placement frame; 6. Fixing frame; 7. Slide rod; 8. Slider; 9. Spring; 10. Connecting frame; 11. Rotating rod; 12. Damper; 13. Horizontal groove; 14. Rotating frame; 15. Connecting rod; 16. Fixing column; 17. Slide plate; 18. Fixing block; 19. Clamping plate; 20. Rubber pad; 21. Hydraulic rod; 22. Connecting block. Detailed Implementation
[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0033] Reference Figure 1 - Figure 3 This utility model provides an embodiment of a long-life, high-RAP asphalt pavement impact testing device, comprising a base 1, a fixed frame 2 fixedly connected to the side wall of the base 1, a fixed rod 3 fixedly connected inside the fixed frame 2, the fixed rod 3 providing a support track for the sliding of the drop hammer device 4 and the placement frame 5, the drop hammer device 4 being slidably connected to the side wall of the fixed rod 3, the drop hammer device 4 sliding on the fixed rod 3 to achieve free fall from a certain height, impacting the asphalt pavement sample above the placement frame 5, thereby simulating the impact load on the asphalt pavement in actual roads, the placement frame 5 being slidably connected to the side wall of the fixed rod 3, the placement frame 5 being used to carry the asphalt pavement sample, the placement frame 5 being provided with a clamping assembly inside the placement frame 5, and a buffer assembly being provided at the bottom of the placement frame 5; the buffer assembly includes a fixed frame 6, the fixed frame 6 being slidably connected to the side wall of the fixed rod 3, the fixed frame 6 being fixedly connected to a sliding rod 7, and the sliding rod 7 being slidably connected to a slider 8 on its side wall. The slide bar 7 provides a sliding track for the slider 8, ensuring that the slider 8 can slide stably in a straight line within the fixed frame 6. A spring 9 is sleeved on the side wall of the slide bar 7. When the placement frame 5 is impacted, the spring 9 is compressed, converting the impact kinetic energy into its own elastic potential energy, thereby reducing the impact on the placement frame 5 and the entire device and providing initial buffering. The placement frame 5 is fixedly connected to the side wall of the base 1 by a connecting frame 10. A rotating rod 11 is rotatably connected inside the connecting frame 10. The side wall of the rotating rod 11 is rotatably connected to the side wall of the slider 8. A damper 12 is fixedly installed between the placement frame 5 and the base 1. The damper 12 further enhances the buffering effect. Through its own damping action, it gradually consumes the vibration energy of the placement frame 5 after being impacted, allowing the placement frame 5 to recover to a stable state more quickly and reducing the interference of vibration on the test results. One end of the spring 9 is fixedly connected inside the fixed frame 6, and the other end of the spring 9 is fixedly connected to the side wall of the slider 8.
[0034] Reference Figure 1 , Figure 2 and Figure 4The clamping assembly includes a rotating frame 14. A transverse groove 13 is provided inside the placement frame 5. The rotating frame 14 is rotatably connected inside the placement frame 5. A connecting rod 15 is rotatably connected to the side wall of the rotating frame 14. A fixing post 16 is fixedly connected inside the placement frame 5. A sliding plate 17 is slidably connected to the side wall of the fixing post 16. By rotating inside the placement frame 5, the rotating frame 14 drives the connecting rod 15 to move, thereby pushing and controlling the sliding plate 17 to achieve the purpose of clamping or releasing the asphalt pavement sample by the clamping plate 19. The side wall of the connecting rod 15 is rotatably connected to the side wall of the sliding plate 17. A fixing block 18 is fixedly connected to the side wall of the sliding plate 17. The side wall of the fixed block 18 is slidably connected inside the transverse groove 13. The side wall of the fixed block 18 is fixedly connected to the clamping plate 19. The side wall of the clamping plate 19 is fixedly connected to the rubber pad 20. The rubber pad 20 increases the friction between the clamping plate 19 and the sample. The bottom of the placement frame 5 is fixedly connected to the hydraulic rod 21. The output end of the hydraulic rod 21 is fixedly connected to the connecting block 22. The side wall of the connecting block 22 is slidably connected inside the placement frame 5. The side wall of the connecting block 22 is fixedly connected to the side wall of the sliding plate 17. The hydraulic rod 21 serves as a power source. Through the extension and retraction of its output end, it provides power for the movement of the sliding plate 17, thereby realizing the automatic clamping and releasing operation of the sample.
[0035] Working principle: The drop hammer device 4 slides along the fixed rod 3 to a set height and then falls freely, impacting the asphalt pavement sample above the placement frame 5, thereby simulating the load borne by the asphalt pavement in actual roads. When impacted, the placement frame 5 drives the connecting frame 10 to move, causing the rotating rod 11 to push the slider 8 to slide on the sliding rod 7, thereby compressing the spring 9. The spring 9 converts the impact kinetic energy into elastic potential energy, achieving initial buffering. At the same time, the damper 12 consumes vibration energy by virtue of its own damping characteristics, further improving the buffering effect, so that the placement frame 5 can quickly return to a stable state, reducing interference with the test results and the vibration impact on the base 1.
[0036] When fixing the sample, the asphalt pavement sample is placed on the placement frame 5, and then the hydraulic rod 21 is activated. The hydraulic rod 21 pushes the sliding plate 17 on one side to slide on the side wall of the fixing column 16. The movement of the sliding plate 17 drives the side wall connecting rod 15 to rotate, which in turn causes the rotating frame 14 to rotate. During this process, the two sliding plates 17 move towards each other, and the fixing block 18 slides in the transverse groove 13, which drives the clamping plate 19 to firmly clamp the asphalt pavement sample. The rubber pad 20 on the side wall of the clamping plate 19 increases the friction between the clamping plate 19 and the sample, ensuring that the sample is firmly fixed.
[0037] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A long-life, high-RAP asphalt pavement impact testing device, comprising a base (1), characterized in that: The base (1) is fixedly connected to a fixed frame (2) on its side wall. The fixed frame (2) is fixedly connected to a fixed rod (3) inside. The fixed rod (3) is slidably connected to a drop hammer device (4) on its side wall. The fixed rod (3) is slidably connected to a placement frame (5) on its side wall. The placement frame (5) is provided with a clamping component inside. The placement frame (5) is provided with a buffer component at its bottom. The buffer assembly includes a fixed frame (6), which is slidably connected to the side wall of the fixed rod (3). A slide rod (7) is fixedly connected inside the fixed frame (6). A slider (8) is slidably connected to the side wall of the slide rod (7). A spring (9) is sleeved on the side wall of the slide rod (7). A connecting frame (10) is fixedly connected to the side wall of the placement frame (5) and the base (1). A rotating rod (11) is rotatably connected inside the connecting frame (10). The side wall of the rotating rod (11) is rotatably connected to the side wall of the slider (8). A damper (12) is fixedly installed between the placement frame (5) and the base (1).
2. The long-life, high-RAP asphalt pavement impact testing device according to claim 1, characterized in that: The clamping assembly includes a rotating frame (14), and a transverse groove (13) is provided inside the placement frame (5). The rotating frame (14) is rotatably connected inside the placement frame (5).
3. The long-life, high-RAP asphalt pavement impact testing device according to claim 2, characterized in that: The rotating frame (14) is rotatably connected to a connecting rod (15) on its side wall, and a fixing column (16) is fixedly connected inside the placement frame (5).
4. The long-life high-RAP asphalt pavement impact testing device according to claim 3, characterized in that: The fixed column (16) is slidably connected to the side wall of the sliding plate (17), and the side wall of the connecting rod (15) is rotatably connected to the side wall of the sliding plate (17).
5. The long-life high-RAP asphalt pavement impact testing device according to claim 4, characterized in that: The side wall of the slide plate (17) is fixedly connected to a fixing block (18), and the side wall of the fixing block (18) is slidably connected inside the transverse groove (13).
6. The long-life high-RAP asphalt pavement impact testing device according to claim 5, characterized in that: The side wall of the fixing block (18) is fixedly connected to a clamping plate (19), and the side wall of the clamping plate (19) is fixedly connected to a rubber pad (20).
7. The long-life high-RAP asphalt pavement impact testing device according to claim 6, characterized in that: A hydraulic rod (21) is fixedly connected to the bottom of the placement frame (5). A connecting block (22) is fixedly connected to the output end of the hydraulic rod (21). The side wall of the connecting block (22) is slidably connected inside the placement frame (5). The side wall of the connecting block (22) is fixedly connected to the side wall of the slide plate (17) on one side.
8. The long-life high-RAP asphalt pavement impact testing device according to claim 1, characterized in that: One end of the spring (9) is fixedly connected inside the fixed frame (6), and the other end of the spring (9) is fixedly connected to the side wall of the slider (8).