Asphalt wearing layer accelerated aging test device

Abstract

The utility model relates to the technical field of aging test devices, and discloses an asphalt wearing layer accelerated aging test device which comprises an annular test bed, a laying groove is formed in the upper surface of the test bed, an asphalt wearing layer body is laid in the laying groove, and a test tire is arranged on the asphalt wearing layer body. A driving motor used for driving the test tire to move on the asphalt wearing layer body is arranged in the middle of the test bed, and a water spraying unit used for controlling the humidity of the asphalt wearing layer body, a heating lamp used for controlling the temperature of the asphalt wearing layer body and an ultraviolet lamp used for irradiating the asphalt wearing layer body are further arranged on the side face of the test bed. According to the utility model, the test tire performs a friction test on the asphalt wearing layer body, the water spraying unit controls the humidity of the asphalt wearing layer body, the heating lamp controls the temperature of the asphalt wearing layer body, and the ultraviolet lamp irradiates the asphalt wearing layer body, so that the asphalt wearing layer can be simulated under various conditions; and the accuracy of accelerated aging test data of the asphalt wearing layer body is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of aging test devices, and particularly relates to an accelerated aging test device for asphalt wearing courses. Background Technique

[0002] As a preventive maintenance measure for asphalt pavements, the surface wearing course of asphalt pavements has the effects of improving the anti-skid performance, noise reduction and wear resistance of the pavement. Under different environments, the aging degrees of the wearing courses of asphalt pavements are different. Therefore, it is necessary to conduct aging tests on asphalt wearing courses, and thus aging test devices are required.

[0003] In order to facilitate the aging test of asphalt wearing courses, the prior art has made many improvements to the accelerated aging test device for asphalt wearing courses. For example, the patent with the publication number CN217654939U discloses a wear simulation device for the surface functional layer of an asphalt pavement, including a simulation device main body, a connecting rod, a standard tire, an asphalt pavement functional layer and a base. A connecting rod is installed at the left end of the simulation device main body, a standard tire is installed at the left end of the connecting rod, an asphalt pavement functional layer is laid under the standard tire, and the asphalt pavement functional layer is connected to the base through a fixing structure. By setting the fixing structure, when it is necessary to replace the asphalt pavement functional layer, pull the handle, so that the fixing block squeezes the return spring in the groove. At this time, the fixing plug is pulled out from the asphalt pavement functional layer. After the replacement is completed, place the replaced functional layer in the placement groove and release the handle. Since the return spring was compressed before, the rebound makes the fixing plug re-insert into the functional layer to fix it. The operation is simple, which is convenient for replacing the worn asphalt pavement functional layer and improves the efficiency.

[0004] The above patent has obvious beneficial effects, but there are still the following deficiencies in actual operation:

[0005] In the above comparative document, the device drives the tire to move continuously on the asphalt wearing course, and then conducts an aging test on the asphalt wearing course. In reality, when the asphalt wearing course is laid on the road surface, its temperature and humidity will both have a certain impact on the aging of the asphalt wearing course. Therefore, the aging test data of the asphalt wearing course in the above document is not accurate. Therefore, it is urgent in this field to improve the accelerated aging test device for asphalt wearing courses to solve the defects of the prior art. Content of the Utility Model

[0006] Aiming at the deficiencies of the prior art, the utility model provides an accelerated aging test device for asphalt wearing courses, which can simulate the accuracy of accelerated aging test data of the asphalt wearing course body under various conditions.

[0007] To achieve the above object, the utility model provides the following technical solution: an accelerated aging test device for asphalt wearing course, which includes an annular test bench. A laying groove is formed on the upper surface of the test bench, and an asphalt wearing course body is laid in the laying groove. A test tire is arranged on the asphalt wearing course body. A driving motor for driving the test tire to move on the asphalt wearing course body is arranged at the middle position of the test bench. A water spraying unit for controlling the humidity of the asphalt wearing course body, a heating lamp for controlling the temperature of the asphalt wearing course body, and an ultraviolet lamp for irradiating the asphalt wearing course body are also arranged on the side of the test bench. An adjusting unit for adjusting the heights of the heating lamp and the ultraviolet lamp is further arranged on the test bench.

[0008] Preferably, the water spraying unit includes a water tank arranged on the side of the test bench. A water pipe extending above the asphalt wearing course body is installed on the upper side of the water tank, and a plurality of water spray heads adapted to the position of the asphalt wearing course body are fixedly installed on the side of the water pipe.

[0009] Preferably, the adjusting unit is provided in two groups. Each group of the adjusting unit includes a bearing column arranged on the upper surface of the test bench. A sliding groove communicating with the outside is formed on the side of the bearing column. A sliding block is slidably connected in the sliding groove. An adjusting rod passing through the upper end of the bearing column and extending to the outside is rotatably connected in the sliding groove. The adjusting rod passes through the sliding block and is threadedly connected with the sliding block. A first limiting nut for limiting the adjusting rod is threadedly connected to the side of the adjusting rod. An installation plate is fixedly connected to the side of the sliding block, and the heating lamp or the ultraviolet lamp is installed on the lower side of the installation plate. A fixing plate for installation is arranged at the lower end of the bearing column.

[0010] Preferably, a clamping column with a polygonal cross-section is fixedly connected to the output end of the driving motor. A clamping sleeve is sleeved on the side of the clamping column, and a connecting shaft is fixedly connected to the side of the clamping sleeve. The test tire is rotatably connected to the side of the connecting shaft.

[0011] Preferably, an inverted U-shaped bearing frame is arranged on the side of the connecting shaft. A placing groove is formed on the upper side of the bearing frame, and a plurality of counterweight blocks are placed in the placing groove. A stabilizing plate is fixedly connected to the side of the bearing frame. A first threaded column passing through the stabilizing plate is fixedly connected to the upper end of the clamping column, and a second limiting nut is threadedly connected to the side of the first threaded column.

[0012] Preferably, a second threaded column is fixedly connected to the bottom of the placing groove, and a third limiting nut is threadedly connected to the side of the second threaded column.

[0013] Preferably, a water collecting groove is arranged at the bottom of the laying groove. A return pipe communicating with the water collecting groove is arranged on the side of the water tank. An installation column for installing the water pipe is arranged on the test bench, and an installation block is fixedly connected to the lower end of the installation column.

[0014] In view of the deficiencies of the prior art, the present utility model provides an accelerated aging test device for asphalt wearing courses, overcoming the deficiencies of the prior art. The beneficial effects of the present utility model are as follows:

[0015] 1. In the present utility model, through the test tire, the water spraying unit, the heating lamp and the ultraviolet lamp, the test tire conducts a friction test on the asphalt wearing course body, the water spraying unit controls the humidity of the asphalt wearing course body, the heating lamp controls the temperature of the asphalt wearing course body, and the ultraviolet lamp irradiates the asphalt wearing course body, so that the accuracy of the accelerated aging test data of the asphalt wearing course body can be simulated under various conditions.

[0016] 2. In the present utility model, the position of the sliding block in the sliding groove can be adjusted up and down through the rotating adjusting rod, and the sliding block drives the height of the heating lamp or the ultraviolet lamp fixed on the mounting plate to be adjusted, so that the heating irradiation range or the heating irradiation intensity of the heating lamp or the ultraviolet lamp on the asphalt wearing course body can be adjusted, and the applicable range of the overall device for the accelerated aging test is improved.

[0017] 3. In the present utility model, counterweight blocks are placed in the placing groove to simulate the vehicle weight, and the number and weight of the counterweight blocks can be selected. After the counterweight blocks are placed, the third limit nut is threadedly connected to the side of the second threaded column and tightened, and the position of the counterweight blocks is limited, so that the acceleration or sudden stop of the simulated test tire of the driving motor can be controlled, and the accuracy of the accelerated aging test data of the asphalt wearing course body is improved.

[0018] Other features and advantages of the present utility model will be described in the following specification, and part of them will be obvious from the specification or understood by implementing the present utility model. The objectives and other advantages of the present utility model can be achieved and obtained through the structures pointed out in the specification, the claims and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings are used to provide a further understanding of the present utility model, and constitute a part of the specification. They are used together with the embodiments of the present utility model to explain the present utility model, and do not constitute a limitation to the present utility model.

[0020] Figure 1 It is a schematic diagram of the overall structure of the present utility model;

[0021] Figure 2 It is a schematic diagram of the partial sectional structure of the test bench in the present utility model;

[0022] Figure 3 It is a schematic diagram of the structure of the bearing column in the present utility model;

[0023] Figure 4 It is a schematic diagram of the structure of the bearing frame in the present utility model;

[0024] Figure 5 For Figure 2 The enlarged structure schematic diagram at position A in the figure.

[0025] In the figure: 1. Test bench; 2. Laying groove; 3. Asphalt wearing course body; 4. Driving motor; 5. Test tire; 6. Water spraying unit; 7. Heating lamp; 8. Ultraviolet lamp; 9. Adjusting unit; 10. Water tank; 11. Water pipe; 12. Water spraying head; 13. Bearing column; 14. Sliding groove; 15. Sliding block; 16. Adjusting rod; 17. First limit nut; 18. Mounting plate; 19. Clamping column; 20. Clamping sleeve; 21. Connecting shaft; 22. Bearing frame; 23. Placing groove; 24. Counterweight; 25. Stabilizing plate; 26. First threaded column; 27. Second limit nut; 28. Second threaded column; 29. Third limit nut; 30. Water collecting trough; 31. Return pipe; 32. Mounting column; 33. Mounting block; 34. Fixed plate. Specific implementation manners

[0026] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments.

[0027] Embodiment 1

[0028] Please refer to Figures 1-5 , an accelerated aging test device for asphalt wearing course, including an annular test bench 1. A laying groove 2 is opened on the upper surface of the test bench 1. An asphalt wearing course body 3 is laid in the laying groove 2. A test tire 5 is arranged on the asphalt wearing course body 3. A driving motor 4 for driving the test tire 5 to move on the asphalt wearing course body 3 is arranged at the middle position of the test bench 1. A water spraying unit 6 for controlling the humidity of the asphalt wearing course body 3, a heating lamp 7 for controlling the temperature of the asphalt wearing course body 3, and an ultraviolet lamp 8 for irradiating the asphalt wearing course body 3 are also arranged on the side of the test bench 1. An adjusting unit 9 for adjusting the heights of the heating lamp 7 and the ultraviolet lamp 8 is also arranged on the test bench 1. The water spraying unit 6 includes a water tank 10 arranged on the side of the test bench 1. A water pipe 11 extending above the asphalt wearing course body 3 is installed on the upper side of the water tank 10. A plurality of water spraying heads 12 adapted to the position of the asphalt wearing course body 3 are fixedly installed on the side of the water pipe 11. A water collecting trough 30 is arranged at the bottom of the laying groove 2. A return pipe 31 communicating with the water collecting trough 30 is arranged on the side of the water tank 10. A mounting column 32 for installing the water pipe 11 is arranged on the test bench 1. The lower end of the mounting column 32 is fixedly connected with a mounting block 33.

[0029] Specific implementation method in this embodiment: When it is necessary to conduct an accelerated aging test on the asphalt wearing course body 3, lay the asphalt wearing course body 3 in the laying groove 2, connect the test tire 5 to the output end of the driving motor 4, and start the driving motor 4. The output end of the driving motor 4 drives the test tire 5 to move on the asphalt wearing course body 3. A water pump is provided in the water tank 10. The water in the water tank 10 is pumped to the water pipe 11 through the water pump in the water tank 10, and the water is sprayed onto the asphalt wearing course body 3 through the spray head 12 to control its humidity. The asphalt wearing course body 3 is heated by starting the heating lamp 7, and the asphalt wearing course body 3 is irradiated with ultraviolet rays by turning on the ultraviolet lamp 8, simulating the accelerated aging conditions of the asphalt wearing course body 3 under various states, thereby improving the accuracy of the accelerated aging test data of the asphalt wearing course body 3.

[0030] The water collecting trough 30 is used for centrally collecting the excess water and returning it to the water tank 10 through the return pipe 31. The height of the heating lamp 7 and the ultraviolet lamp 8 can be adjusted through the adjusting unit 9, thereby adjusting the irradiation range and intensity of the heating lamp 7 and the ultraviolet lamp 8. The mounting column 32 is mounted on the test bench 1 through the cooperation of the mounting block 33 and the fastening bolt, and its position can be changed.

[0031] Among them, the driving motor 4, the heating lamp 7, and the ultraviolet lamp 8 mentioned above can all be purchased on the market. They belong to mature technologies and have been fully disclosed. Therefore, they are not repeated in the specification. The driving motor 4, the heating lamp 7, and the ultraviolet lamp 8 are all equipped with power connection lines, and they are electrically connected to the external main controller and the 220V phase voltage (or 380V line voltage) through the power lines. And the main controller can be a conventional known device such as a computer that plays a control role.

[0032] Embodiment Two

[0033] Please refer to Figures 1-3 , this embodiment includes the above embodiment. Among them, it further includes: The adjusting unit 9 is provided in two groups. Each group of adjusting units 9 includes a bearing column 13 provided on the upper surface of the test bench 1. A sliding groove 14 communicating with the outside is opened on the side of the bearing column 13. A sliding block 15 is slidably connected in the sliding groove 14. An adjusting rod 16 passing through the upper end of the bearing column 13 and extending to the outside is rotatably connected in the sliding groove 14. The adjusting rod 16 passes through the sliding block 15 and is threadedly connected to the sliding block 15. A first limiting nut 17 for limiting the adjusting rod 16 is threadedly connected to the side of the adjusting rod 16. An installation plate 18 is fixedly connected to the side of the sliding block 15. The heating lamp 7 or the ultraviolet lamp 8 is installed on the lower side of the installation plate 18. A fixing plate 34 for installation is provided at the lower end of the bearing column 13.

[0034] Specific implementation method in this embodiment: When it is necessary to adjust the height of the heating lamp 7 or the ultraviolet lamp 8, by rotating the adjusting rod 16, the adjusting rod 16 is threadedly connected to the sliding block 15. Therefore, when the adjusting rod 16 rotates, it will drive the sliding block 15 to move up and down in the sliding groove 14. The sliding block 15 drives the mounting plate 18 to move up and down, thereby adjusting the height of the heating lamp 7 or the ultraviolet lamp 8 fixed on the lower side of the mounting plate 18. Subsequently, tighten the first limit nut 17, and the first limit nut 17 limits and fixes the position of the adjusting rod 16, which can adjust the heating irradiation range or heating irradiation intensity of the heating lamp 7 or the ultraviolet lamp 8 on the asphalt wearing course body 3, and improve the applicable range of the overall device for accelerating the aging test.

[0035] Embodiment Three

[0036] Please refer to Figure 1 , Figure 2 , Figure 4 This embodiment includes all the above embodiments. Among them, it further includes: A clamping column 19 with a polygonal cross-section is fixedly connected to the output end of the drive motor 4. A clamping sleeve 20 is sleeved on the side of the clamping column 19. A connecting shaft 21 is fixedly connected to the side of the clamping sleeve 20. The test tire 5 is rotatably connected to the side of the connecting shaft 21. A U-shaped bearing frame 22 is provided on the side of the connecting shaft 21. A placing groove 23 is opened on the upper side of the bearing frame 22. A number of counterweight blocks 24 are placed in the placing groove 23. A stabilizing plate 25 is fixedly connected to the side of the bearing frame 22. A first threaded column 26 passing through the stabilizing plate 25 is fixedly connected to the upper end of the clamping column 19. A second limit nut 27 is threadedly connected to the side of the first threaded column 26. A second threaded column 28 is fixedly connected to the bottom of the placing groove 23. A third limit nut 29 is threadedly connected to the side of the second threaded column 28.

[0037] Specific implementation method in this embodiment: When it is necessary to install the test tire 5, the clamping sleeve 20 is sleeved on the side of the clamping column 19. At the same time, the stabilizing plate 25 is sleeved on the side of the first threaded column 26, and the second limit nut 27 is threadedly connected to the side of the first threaded column 26 and tightened to limit the stabilizing plate 25. The stabilizing plate 25 limits the position of the bearing frame 22. Place the counterweight blocks 24 in the placing groove 23 to simulate the vehicle weight, and the number and weight of the counterweight blocks 24 can be selected. After the counterweight blocks 24 are placed, the third limit nut 29 is threadedly connected to the side of the second threaded column 28 and tightened to limit the position of the counterweight blocks 24. The acceleration or sudden stop of the simulated test tire 5 by the drive motor 4 can be controlled, improving the accuracy of the data for the accelerating aging test of the asphalt wearing course body 3.

[0038] The above are only the preferred embodiments of the present utility model and are 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 recorded in the foregoing embodiments or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. An accelerated aging test device for asphalt wearing course, comprising a ring-shaped test bench (1), characterized in that, A laying groove (2) is formed on the upper surface of the test bench (1), an asphalt wearing course body (3) is laid in the laying groove (2), a test tire (5) is arranged on the asphalt wearing course body (3), a driving motor (4) for driving the test tire (5) to move on the asphalt wearing course body (3) is arranged at the middle position of the test bench (1), a water spraying unit (6) for controlling the humidity of the asphalt wearing course body (3), a heating lamp (7) for controlling the temperature of the asphalt wearing course body (3), and an ultraviolet lamp (8) for irradiating the asphalt wearing course body (3) are further arranged on the side surface of the test bench (1), and an adjusting unit (9) for adjusting the heights of the heating lamp (7) and the ultraviolet lamp (8) is further arranged on the test bench (1).

2. The accelerated aging test device for asphalt wearing course according to claim 1, wherein, The water spraying unit (6) includes a water tank (10) arranged on the side surface of the test bench (1), a water pipe (11) extending above the asphalt wearing course body (3) is installed on the upper side surface of the water tank (10), and a plurality of water spraying heads (12) adapted to the position of the asphalt wearing course body (3) are fixedly installed on the side surface of the water pipe (11).

3. The accelerated aging test device for asphalt wearing course according to claim 1, characterized in that, The adjusting unit (9) is arranged in two groups, and each group of the adjusting unit (9) includes a bearing column (13) arranged on the upper surface of the test bench (1). A sliding groove (14) communicated with the outside is formed on the side surface of the bearing column (13), a sliding block (15) is slidably connected in the sliding groove (14), an adjusting rod (16) passing through the upper end of the bearing column (13) and extending to the outside is rotatably connected in the sliding groove (14). The adjusting rod (16) passes through the sliding block (15) and is in threaded connection with the sliding block (15). A first limiting nut (17) for limiting the adjusting rod (16) is in threaded connection with the side surface of the adjusting rod (16). An installation plate (18) is fixedly connected to the side surface of the sliding block (15), and the heating lamp (7) or the ultraviolet lamp (8) is installed on the lower side surface of the installation plate (18). A fixing plate (34) for installation is arranged at the lower end of the bearing column (13).

4. An accelerated aging test device for asphalt wearing course according to claim 1, characterized in that, The output end of the driving motor (4) is fixedly connected with a clamping column (19) with a polygonal cross section. A clamping sleeve (20) is sleeved on the side surface of the clamping column (19), a connecting shaft (21) is fixedly connected to the side surface of the clamping sleeve (20), and the test tire (5) is rotatably connected to the side surface of the connecting shaft (21).

5. An accelerated aging test device for asphalt wearing courses according to claim 4, characterized in that, A U-shaped bearing frame (22) is arranged on the side surface of the connecting shaft (21). A placing groove (23) is formed on the upper side surface of the bearing frame (22), a plurality of counterweight blocks (24) are placed in the placing groove (23), a stabilizing plate (25) is fixedly connected to the side surface of the bearing frame (22), a first threaded column (26) passing through the stabilizing plate (25) is fixedly connected to the upper end of the clamping column (19), and a second limiting nut (27) is in threaded connection with the side surface of the first threaded column (26).

6. The accelerated aging test device for asphalt wearing course according to claim 5, characterized in that, A second threaded column (28) is fixedly connected to the inner bottom of the placing groove (23), and a third limiting nut (29) is in threaded connection with the side surface of the second threaded column (28).

7. An accelerated aging test device for asphalt wearing course according to claim 2, characterized in that, A water collecting tank (30) is provided at the inner bottom of the laying groove (2). A return pipe (31) communicating with the water collecting tank (30) is provided on the side surface of the water tank (10). Mounting columns (32) for mounting a water pipe (11) are provided on the test bench (1), and a mounting block (33) is fixedly connected to the lower end of the mounting column (32).

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