An asphalt mixture rut tester capable of simulating vehicle ramp travel and rainfall
Patent Information
- Application Number
- CN202522524281.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-27
- Publication Date
- 2026-10-30
- Estimated Expiration
- 2035-11-27
AI Technical Summary
为使试件达到60℃的试验温度，通常需要将试件放置在试验设备内持续加热6～12小时，单次试验周期长，导致一天内可完成的试验数量有限，影响检测效率
[0017]本实用新型可调坡度结构提高试验真实度，通过丝杆式升降机调节试验板倾角，可模拟车辆上坡、下坡等工况，使测试更贴近实际使用场景；能模拟车辆单向与变速作用测试轮可连续单向运动，不依赖往复压覆模式，可更真实地模拟车轮累积荷载对沥青混合料的影响；可模拟降雨环境，有利于评估混合料在降雨工况下的性能变化规律；能提高试验效率，升温、荷载施加与降雨模拟均在同一设备上完成，有助于缩短单次试验周期并提高整体工作效率。
Smart Images
Figure CN224921609U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of asphalt mixture rutting test technology, and in particular to an asphalt mixture rutting tester that can simulate vehicle driving on slopes and rainfall. Background Technology
[0002] High-temperature stability of asphalt mixtures is a crucial performance indicator in road engineering. Existing asphalt mixture rutting tests typically involve placing the specimen in a test chamber, heating it to a standard temperature with hot air, and then repeatedly pressing a test wheel onto the specimen to obtain dynamic stability indicators. This traditional testing method has the following shortcomings: First, the specimen heating method is inefficient. To reach the test temperature of 60°C, the specimen usually needs to be placed in the test equipment and heated continuously for 6 to 12 hours. The long test cycle results in a limited number of tests that can be completed in a day, affecting the testing efficiency.
[0003] Secondly, the test conditions differ from actual vehicle conditions. Traditional rutting tests use the reciprocating motion of the test wheel to simulate loads, while in real-world roads, vehicles mostly travel in one direction, and the tires rarely repeatedly act on the same spot. Therefore, the test cannot accurately reflect the deformation and apparent changes after the vehicle experiences cumulative unidirectional stress. Furthermore, rutting often occurs on slopes, while traditional test setups are generally conducted on horizontal surfaces, failing to simulate the stress characteristics of vehicles traveling uphill or downhill. Additionally, traditional test setups have limited testing parameters, primarily obtaining dynamic stability and other indicators, and cannot simulate rainfall or reflect the long-term, variable-speed effects of wheels on the specimen surface.
[0004] Therefore, it is necessary to provide an asphalt mixture rutting tester that can simulate vehicle driving on slopes and rainfall to solve the problems existing in the prior art. Utility Model Content
[0005] The purpose of this invention is to address the shortcomings of existing technologies by providing an asphalt mixture rutting tester that can simulate vehicle driving on slopes and rainfall, thereby solving the problems mentioned in the background art.
[0006] To achieve the above objectives, the present invention adopts the following technical solution: An asphalt mixture rutting tester that can simulate vehicle driving on slopes and rainfall includes: a box, a specimen slope adjustment component located at the bottom of the box, a test wheel transmission component located above the specimen slope adjustment component, a test wheel installed on the test wheel transmission component, a test wheel angle adjustment component connecting the test wheel transmission component and the box, and a water spray component located on one side of the specimen slope adjustment component. The specimen slope adjustment assembly has a specimen groove at the top, a temperature-conducting cavity at the bottom and around the specimen groove, and a drainage groove around the temperature-conducting cavity; a lifting shaft and a rotating shaft are respectively hinged at both ends of the bottom of the specimen slope adjustment assembly; the rotating shaft is fixedly connected to the bottom surface of the chassis, and the lifting shaft is driven to lift by a scissor lift; a temperature control assembly is provided below the temperature-conducting cavity; a heat-conducting medium circulation loop is formed between the temperature-conducting cavity and the temperature control assembly; The test wheel transmission assembly includes: a rotary assembly and two rotary shafts disposed on one side of the rotary assembly; one end of the two rotary shafts is fixedly connected to the rotary assembly, and the other end extends through the side wall of the housing. The test wheel is mounted on the rotating surface of the rotating assembly; The test wheel angle adjustment assembly includes: a first guide rail and a second guide rail disposed on the side wall of the housing, a fixed base disposed below the second guide rail, and a screw jack mounted above the fixed base; the first guide rail is a limiting hole, the second guide rail is an arc guide rail, and the center of the arc of the second guide rail is located at the center of the first guide rail; one rotary shaft passes through the first guide rail, and another rotary shaft passes through the second guide rail and is hinged to the top of the screw of the screw jack; the rotary shafts are provided with limiting rings on both sides of the second guide rail.
[0007] Preferably, the temperature-conducting cavity is provided with a spiral coil, and the space between the spiral coil and the temperature-conducting cavity is filled with a heat-conducting medium; the liquid inlet pipe of the spiral coil is connected to the liquid outlet of the temperature control component, and the liquid outlet pipe of the spiral coil is connected to the liquid inlet of the temperature control component; the liquid outlet of the temperature control component is provided with a circulation pump, and the liquid outlet end of the circulation pump is provided with a check valve.
[0008] Preferably, the lifting shaft is driven by two scissor lifts arranged side by side.
[0009] Preferably, a sewage tank is connected to one side of the drainage trough via a drainage pipe, and a filter screen is provided at the front end of the drainage pipe.
[0010] Preferably, the water spraying assembly includes: a water tank located on the top of the housing, a water guide pipe connected to the water outlet of the water tank, and a spray pipe connected to the end of the water guide pipe; a spray switch is provided at the end of the spray pipe, and a fan-shaped nozzle is provided downstream of the spray switch.
[0011] Preferably, the rotary assembly includes: two symmetrically arranged side plates, a drive shaft and a driven shaft disposed between the two side plates, a sprocket, a chain, a support plate, an L-shaped connecting plate, and a drive motor; sprockets are sleeved on both the drive shaft and the driven shaft; the chain is connected end to end and sleeved on the sprockets to form a closed rotary link; several support plates are equidistantly installed on the outside of the chain through the L-shaped connecting plate to form an annular rotary surface; the test wheel is installed on the support plate; and the output shaft of the drive motor is drively connected to the drive shaft.
[0012] Preferably, the test wheel includes: a positioning plate fixedly connected to the support plate, a U-shaped wheel frame, an electric push rod, a wheel body, and a storage battery; the positioning plate and the U-shaped wheel frame are connected by two electric push rods; the wheel body is rotatably mounted on the open end of the U-shaped wheel frame; and the electric push rod is electrically connected to the storage battery.
[0013] Preferably, the two rotating shafts pass through the annular rotating surface of the rotating assembly and are fixedly connected to the side plate.
[0014] Preferably, both the first and second guide rails are arc-shaped tracks, with the center of the arc of the second guide rail located at the bottom of the first guide rail; the arcs of the first and second guide rails are approximately the same; the width of the second guide rail is slightly greater than that of the first guide rail; an angle locking pin is provided on the lower outer wall of the first guide rail; the rotary shaft passing through the second guide rail is hinged to the end of the screw of the screw jack via a lifting lug; the rotary shaft passing through the first guide rail extends out of the gap between the bottom of the first guide rail and the angle locking pin.
[0015] Preferably, the upper outer walls of the first and second guide rails are provided with positioning pins, and the two rotating shafts pass through the gap between the top of the first and second guide rails and the positioning pins.
[0016] This utility model discloses an asphalt mixture rutting tester that can simulate vehicle driving on slopes and rainfall, which has the following beneficial effects.
[0017] This invention features an adjustable slope structure that enhances the realism of testing. By adjusting the tilt angle of the test plate using a screw-type lifting mechanism, it can simulate vehicle uphill and downhill driving conditions, making the test more closely resemble actual usage scenarios. It can simulate the unidirectional and variable-speed action of vehicles, allowing the test wheel to move continuously in one direction without relying on reciprocating pressure patterns, thus more realistically simulating the impact of cumulative wheel load on asphalt mixtures. It can also simulate rainfall environments, which is beneficial for evaluating the performance changes of mixtures under rainfall conditions. Furthermore, it improves testing efficiency, as heating, load application, and rainfall simulation are all completed on the same equipment, helping to shorten the cycle of a single test and improve overall work efficiency. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the overall structure of the asphalt mixture rutting tester of this utility model, which can simulate vehicle driving on slopes and rainfall.
[0019] Figure 2 This is a front view structural diagram of the asphalt mixture rutting tester of this utility model, which can simulate vehicle driving on slopes and rainfall.
[0020] Figure 3 This is a rear view schematic diagram of the asphalt mixture rutting tester of this utility model, which can simulate vehicle driving on slopes and rainfall.
[0021] Figure 4This is a schematic diagram of the overall structure of the specimen slope adjustment component of this utility model.
[0022] Figure 5 This is a side view of the specimen slope adjustment component of this utility model before angle adjustment.
[0023] Figure 6 This is a side view of the specimen slope adjustment component of this utility model after angle adjustment.
[0024] Figure 7 This is a schematic diagram of the connection structure between the test wheel transmission assembly and the side wall of the housing according to this utility model.
[0025] Figure 8 This is a top view schematic diagram of the connection structure between the test wheel transmission assembly and the side wall of the housing according to this utility model.
[0026] Figure 9 This is a side view of the connection structure between the test wheel transmission assembly and the side wall of the housing according to this utility model.
[0027] Figure 10 This is a frontal view of the asphalt mixture rutting tester of this utility model, which can simulate vehicle driving on a slope and rainfall, when simulating vehicle driving on a slope.
[0028] Figure 11 This is a schematic diagram of the rear view structure of the asphalt mixture rutting tester of this utility model, which can simulate vehicle driving on a slope and rainfall, when simulating vehicle driving on a slope.
[0029] Figure 12 This is a front view structural diagram of the asphalt mixture rutting tester of this utility model, which can simulate vehicle driving on slopes and rainfall, when changing the specimen.
[0030] Figure 13 This is a rear view diagram of the asphalt mixture rutting tester of this utility model, which can simulate vehicle driving on slopes and rainfall, when changing the specimen.
[0031] In the attached image: 1. Test wheel; 101. Positioning plate; 102. Electric push rod; 103. U-shaped wheel frame; 104. Wheel body; 105. Battery; 2. Specimen; 3. Test wheel transmission assembly; 301. Side plate; 302. Rotary shaft; 303. Drive shaft; 304. Driven shaft; 305. Sprocket; 306. Chain; 307. Support plate; 308. L-shaped connecting plate; 309. Drive motor; 4. Test wheel angle adjustment assembly; 401. First guide rail; 402. Second guide rail; 403. Fixing base ; 404, Angle locking pin; 405, Positioning pin; 406, Screw jack; 407, Lifting lug; 5, Water tank; 6, Water guide pipe; 7, Sprinkler pipe; 8, High-frequency industrial camera; 9, Specimen slot; 10, Temperature conduction chamber; 11, Drainage trough; 12, Lifting shaft; 13, Rotating shaft; 14, Scissor jack; 1401, Base; 1402, Scissor linkage; 1403, Screw; 1404, Crane motor; 1405, Bearing seat; 15, Temperature control component; 16, Wastewater tank; 17, Chassis. 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 of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.
[0033] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0034] Example 1
[0035] Please refer to Figures 1 to 3 An asphalt mixture rutting tester capable of simulating vehicle slope driving and rainfall includes: a housing, a specimen slope adjustment component located at the bottom of the housing, a test wheel transmission component 3 located above the specimen slope adjustment component, a test wheel 1 mounted on the test wheel transmission component 3, a test wheel angle adjustment component connecting the test wheel transmission component 3 and the housing, and a water spray component located on one side of the specimen slope adjustment component; in this embodiment, a high-frequency industrial camera 8 is also provided on the side of the specimen slope adjustment component away from the water spray component, and the high-frequency industrial camera 8 acquires surface images of the asphalt mixture specimen 2 during the test, providing data support for subsequent analysis of wear, skid resistance, and structural changes; The specimen slope adjustment assembly has a specimen groove 9 at the top, a temperature conducting cavity 10 at the bottom and around the specimen groove 9, and a drainage groove 11 around the temperature conducting cavity 10. The bottom ends of the specimen slope adjustment assembly are respectively hinged to a lifting shaft 12 and a rotating shaft 13. The rotating shaft 13 is fixedly connected to the bottom surface of the housing 17, and the lifting shaft 12 is driven to lift by a scissor lift 14. A temperature control assembly 15 is provided below the temperature conducting cavity 10. A heat conduction medium circulation loop is formed between the temperature conducting cavity 10 and the temperature control assembly 15. It should be noted that in this embodiment, the specimen slot 9 can hold asphalt mixture specimens that meet the specifications of "300mm long × 300mm wide × 40~150mm thick"; the outer wall of the temperature conducting cavity 10 is made of stainless steel.
[0036] The test wheel transmission assembly 3 includes: a rotary assembly and two rotary shafts 302 disposed on one side of the rotary assembly; one end of the two rotary shafts 302 is fixedly connected to the rotary assembly, and the other end extends out of the side wall of the housing; Test wheel 1 is mounted on the rotating surface of the rotating assembly; The test wheel angle adjustment assembly 4 includes: a first guide rail 401 and a second guide rail 402 disposed on the side wall of the housing, a fixed base 403 disposed below the second guide rail 402, and a screw jack 406 mounted above the fixed base 403; the first guide rail 401 is a limiting hole, the second guide rail 402 is an arc guide rail, and the center of the arc of the second guide rail 402 is located at the center of the first guide rail 401; one rotary shaft 302 passes through the first guide rail 401, and the other rotary shaft 302 passes through the second guide rail 402 and is connected to the screw jack 406. The top of rod 1403 is hinged, and the screw jack 406 lifts the rotary shaft 302 that passes through the second guide rail 402, driving the test wheel transmission assembly 3 to rotate along the first guide rail 401. The rotary shaft 302 is provided with limiting rings on both sides of the second guide rail 402 to limit the rotary shaft 302 on both sides, and at the same time improve the fixing stability of the test wheel transmission assembly 3. It should be noted that in this embodiment, in order to improve the fixing effect of the test wheel transmission assembly, the first guide rail 401 and the second guide rail 402 are provided with an extension section in the direction perpendicular to the side wall of the box.
[0037] It should be noted that the test wheel angle adjustment component 4 and the rotary shaft 302 are equivalent to the test wheel transmission component 3 being wall-mounted. Compared with the method of fixing the test wheel transmission component 3 by setting a mounting bracket at the bottom, the wall-mounted method has the advantage that the rotary surface of the test wheel transmission component 3 and the top of the specimen slope adjustment component are completely unobstructed. When the test wheel 1 moves to the test wheel transmission component 3, the asphalt mixture specimen 2 can be placed or removed very easily. Moreover, better photo results can be obtained when using the high-frequency industrial camera 8 for shooting.
[0038] Example 2
[0039] Please refer to Figures 1 to 4Based on Embodiment 1, as a preferred embodiment, a spiral coil (not shown in the figure) is provided inside the temperature-conducting cavity 4, and the space between the spiral coil and the temperature-conducting cavity 4 is filled with a heat-conducting medium; the inlet pipe of the spiral coil is connected to the outlet of the temperature control component 9, and the outlet pipe of the spiral coil is connected to the inlet of the temperature control component 9 (not shown in the figure); a circulation pump is provided at the outlet of the temperature control component 9, and a check valve (not shown in the figure) is provided at the outlet of the circulation pump; in this embodiment, glycerol is used as the heat-conducting medium. The main reason for using glycerol is that it has a high boiling point (approximately 290°C), is non-toxic and environmentally friendly, and has a high upper limit for heating the asphalt mixture specimen 1. The heating range for the asphalt mixture specimen 1 is set from room temperature to 120°C. However, it should be noted that glycerol has a high viscosity at room temperature, requiring the use of a glycerol circulation pump. It should also be noted that a temperature sensor is installed on the outer wall of the heat-conducting cavity 4. The temperature sensor collects the temperature of the outer wall of the heat-conducting cavity 4 and transmits it to the temperature control component 9. The temperature control component heats the heat-conducting medium and then pumps it into the spiral coil through the circulation pump to fill the space between the spiral coil and the heat-conducting cavity 4 with the heat-conducting medium, thereby heating the asphalt mixture specimen 1. Alternatively, when the test conditions do not exceed 80°C, water can also be used as the heat-conducting medium. In this embodiment, the temperature control component 9 uses a thermal oil heater, specifically a commercially available Jiuyang Machinery JYO series heater.
[0040] Example 3
[0041] Based on Embodiment 2, as a preferred embodiment, a spiral heating wire is provided inside the temperature-conducting cavity 10, and the space between the spiral heating wire and the temperature-conducting cavity 10 is filled with a heat-conducting medium. In this embodiment, a temperature sensor is provided on the outer wall of the temperature-conducting cavity 10, and the temperature sensor is connected to an external display to display the temperature of the outer wall of the temperature-conducting cavity 10. Compared with the formation of a heat-conducting medium circulation loop between the temperature-conducting cavity 10 and the temperature control component 15, this embodiment directly sets the spiral heating wire inside the temperature-conducting cavity 10, which makes the device simpler and the heating faster, but the heat-conducting medium is more troublesome to replace, and the heating uniformity is not as good as that of the heat-conducting oil heater.
[0042] Example 4
[0043] Please refer to Figures 4 to 6 Based on Embodiment 1, as a preferred embodiment, the lifting shaft 12 is driven by two scissor lifts 14 arranged side by side.
[0044] In this embodiment, the scissor lift 14 includes: a base 1401, a scissor linkage 1402, a lead screw 1403, a lifting motor 1404, and a support seat 1405. The scissor linkage 1402 includes two sets of symmetrically arranged hinged rods, one end of each set of hinged rods is hinged to the base 1401, and the other end is hinged to the support seat 1405. One end of the hinge point of the two sets of symmetrically arranged hinged rods is connected to the lead screw 1403 via a nut, and the other end is rotatably connected to the lead screw 1403. The end of the lead screw 1403 rotatably connected to the hinge point is drively connected to the output shaft of the lifting motor 1404. Driven by the lifting motor 1404, the scissor linkage 1402 can be raised and lowered, thereby raising and lowering the support seat 1405, the lifting shaft 12, and, in conjunction with the rotating shaft 13, adjusting the angle of the specimen slope adjustment assembly.
[0045] Example 5
[0046] Please refer to Figures 1 to 3 Based on Embodiment 1, as a preferred embodiment, a sewage tank 16 is connected to one side of the drainage trough 11 via a drainage pipe, and a filter screen is provided at the front end of the drainage pipe; alternatively, a Y-shaped filter can be connected to the outlet of the sewage tank 16 to filter sewage, and the filtered sewage can be reused.
[0047] Preferably, in this embodiment, the water spraying assembly includes: a water tank 5 located on the top of the tank, a water guide pipe 6 connected to the water outlet of the water tank 5, and a water spraying pipe 7 connected to the end of the water guide pipe 6; a water spraying switch (not shown in the figure) is provided at the end of the water spraying pipe 7, and a fan-shaped nozzle (not shown in the figure) is provided downstream of the water spraying switch.
[0048] Example 6
[0049] Please refer to Figures 7 to 9 Based on Embodiment 1, as a preferred embodiment, the rotary assembly in this embodiment includes: two symmetrically arranged side plates 301, a drive shaft 303 and a driven shaft 304 disposed between the two side plates 301, a sprocket 305, a chain 306, a support plate 307, an L-shaped connecting plate 308, and a drive motor 309; sprockets 305 are sleeved on both the drive shaft 303 and the driven shaft 304; the chain 306 is connected end to end and sleeved on the sprockets 305 to form a closed rotary link; several support plates 307 are equidistantly installed on the outside of the chain 306 through the L-shaped connecting plate 308 to form an annular rotary surface; a test wheel 1 is installed on the support plate 307; the output shaft of the drive motor 309 is drively connected to the drive shaft 303. Preferably, in this embodiment, the two rotary shafts 302 pass through the annular rotary surface of the rotary assembly and are fixedly connected to the side plates 301. In this embodiment, one side of the L-shaped connecting plate 308 serves as the chain plate of the chain 306, and the bent section is fixed to the support plate 307 by bolts.
[0050] It should be noted that in this embodiment, in order to enhance the stability of the two side plates 301, several connecting shafts are provided between the two side plates 301. When installing the connecting shafts, interference with the annular rotating surface should be avoided.
[0051] In this embodiment, the drive shaft 303 is driven to rotate by the drive motor 309, which in turn drives the sprocket 305 on the drive shaft 303 to rotate, thereby driving the closed rotary link formed by the chain 306 to rotate, which in turn drives the driven shaft 304 and its sprocket 305 to rotate, forming an annular rotary surface with the support plate 307.
[0052] It should be noted that, since pressure needs to be applied to the test wheel 1 during the rutting test, the combination of support plate 307 and chain 306 sprocket 305 can better bear the reaction force of the test wheel on the support plate 307 compared to a general conveyor belt. In addition, it should be noted that, in this embodiment, the diameter of the test wheel 1 is 20cm, the wheel width is 5cm, the contact area between the test wheel 1 and the specimen 2 is about 15 square centimeters, the pressure of the test wheel on the specimen is 0.7MPa, and the calculated pressure is 1050N.
[0053] Example 7
[0054] Please refer to Figures 1 to 3 and Figure 9 Based on embodiment 6, as a preferred embodiment, the test wheel 1 in this embodiment includes: a positioning plate 101 fixedly connected to the support plate 307, a U-shaped wheel frame 103, an electric push rod 102, a wheel body 104, and a storage battery 105; the positioning plate 101 and the U-shaped wheel frame 103 are connected by two electric push rods 102; the wheel body 104 is rotatably mounted on the open end of the U-shaped wheel frame 103; the electric push rod 102 is electrically connected to the storage battery 105.
[0055] In this embodiment, the electric actuator 102 is a Taiming T2 series electric actuator 102, and the battery 105 is a 24V DC power supply.
[0056] It should be noted that the purpose of setting up the electric push rod 102 is to apply pressure to the wheel 104. To control the timing of applying and not applying pressure with the electric push rod 102, in this embodiment, a control device and a position sensor are fixedly installed on the U-shaped wheel frame, both rotating synchronously with the test wheel (not shown in the figure). In this embodiment, the control device uses a Huichuan PLC miniature controller (model: H2U-1616MT, rated operating voltage: DC24V), connected to the electric push rod 102 and the position sensor via a wired connection to achieve real-time position detection and motion control. The position sensor uses a domestically produced laser displacement switch to detect the position of the test wheel 1 at the left or right end of the temperature-conducting cavity 10. This embodiment uses a Huarui HCJ-LD300 laser switch sensor with a rated operating voltage of DC24V and a detection distance of 0–300mm, which meets the non-contact detection requirements within the spatial range of this device. The sensor is installed on the side of the U-shaped wheel frame and connected to the control device via a wired connection; its signal is directly read by the control device. Fixed reflectors are provided at the left and right ends of the temperature-conducting cavity 10. The fixed reflectors are vertical strip plates that can be triggered when the electric push rod 102 extends or retracts (not shown in the figure), and serve as the trigger targets for the position sensor. When the U-shaped wheel frame rotates with the rotary assembly, the position sensor passes through the right fixed reflector and the left fixed reflector of the temperature-conducting cavity 10 in sequence, and outputs two position status signals to the control device.
[0057] The control logic is as follows: When the position sensor detects the reflective surface at the right end of the temperature-conducting cavity 10, the control device immediately outputs a drive command to extend the electric push rod 102, pushing the wheel 104 to press against the surface of the specimen, thus entering the loading state; the loading force is 1050N.
[0058] When the position sensor detects the reflective surface at the left end of the temperature-conducting cavity 10, the control device outputs a retraction command, causing the electric push rod 102 to retract and the wheel 104 to leave the surface of the specimen, thus achieving the unloading action. It should be understood that the above description of the timing of applying pressure to the electric push rod 102 and the timing of not applying pressure are merely for clearly illustrating the technical solution of this application and do not involve any improvement to the method.
[0059] Example 8
[0060] Please refer to Figures 10 to 13 Based on embodiment 6, this embodiment is applied to the scenario where multiple test wheels 1 are installed on the rotating surface of the rotating component and the asphalt mixture specimen 2 needs to be replaced. At this time, because there are multiple test wheels 1, the top of the specimen slope adjustment component is always blocked by the test wheels 1, making it very inconvenient to replace the mixture specimen 2. In this embodiment, both the first guide rail 401 and the second guide rail 402 are arc-shaped tracks, with the center of the arc of the second guide rail 402 located at the bottom of the first guide rail 401; the curvatures of the first guide rail 401 and the second guide rail 402 are approximately the same; the width of the second guide rail 402 is slightly larger than that of the first guide rail 401; an angle locking pin 404 is provided on the lower outer wall of the first guide rail 401; as shown Figure 10 and Figure 11 As shown, when the rotary shaft 302 passing through the second guide rail 402 is hinged to the end of the screw 1403 of the screw jack 406 via the lug 407; when the rotary shaft 302 passing through the first guide rail 401 passes through the gap between the bottom of the first guide rail 401 and the angle locking pin 404, the test wheel transmission assembly 3 can rotate along the first guide rail 401.
[0061] The asphalt mixture specimen 2 needs to be replaced. In this embodiment, first remove the angle locking pin 404, disconnect the rotary shaft 302 from the end of the screw 1403 of the screw jack 406, and then place the test wheel transmission assembly 3 on the test platform, positioning the two rotary shafts 302 on top of the first guide rail 401 and the second guide rail 402. At this time, insert the positioning pin 405, as follows. Figure 12 and Figure 13 As shown, the two rotating shafts 302 pass through the gap between the top of the first guide rail 401 and the second guide rail 402 and the positioning pin 405, respectively. At this time, the asphalt mixture specimen 2 can be prepared. After the replacement is completed, the positioning pin 405 is removed, the test wheel transmission assembly 3 is reset, and the rotating shaft 302 passing through the second guide rail 402 is reconnected to the end of the screw 1403 of the screw jack 406 through the lifting lug 407. The angle locking pin 404 is then reinserted.
[0062] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Substitutions may include replacements for some structures, devices, or method steps, or they may be complete technical solutions. Equivalent substitutions or modifications made based on the technical solution and inventive concept of this utility model should all be covered within the scope of protection of this utility model.
Claims
1. An asphalt mixture rutting test apparatus capable of simulating vehicle driving on slopes and rainfall, characterized in that, include: The chamber, the specimen slope adjustment assembly located at the bottom of the chamber, the test wheel transmission assembly located above the specimen slope adjustment assembly, the test wheel installed on the test wheel transmission assembly, the test wheel angle adjustment assembly connecting the test wheel transmission assembly and the chamber, and the water spray assembly located on one side of the specimen slope adjustment assembly. The specimen slope adjustment assembly has a specimen groove at the top, a temperature-conducting cavity at the bottom and around the specimen groove, and a drainage groove around the temperature-conducting cavity; a lifting shaft and a rotating shaft are respectively hinged at both ends of the bottom of the specimen slope adjustment assembly; the rotating shaft is fixedly connected to the bottom surface of the chassis, and the lifting shaft is driven to lift by a scissor lift; a temperature control assembly is provided below the temperature-conducting cavity; a heat-conducting medium circulation loop is formed between the temperature-conducting cavity and the temperature control assembly; The test wheel transmission assembly includes: a rotary assembly and two rotary shafts disposed on one side of the rotary assembly; one end of the two rotary shafts is fixedly connected to the rotary assembly, and the other end extends through the side wall of the housing. The test wheel is mounted on the rotating surface of the rotating assembly; The test wheel angle adjustment assembly includes: a first guide rail and a second guide rail disposed on the side wall of the housing, a fixed base disposed below the second guide rail, and a screw jack mounted above the fixed base; the first guide rail is a limiting hole, the second guide rail is an arc guide rail, and the center of the arc of the second guide rail is located at the center of the first guide rail; one rotary shaft passes through the first guide rail, and another rotary shaft passes through the second guide rail and is hinged to the top of the screw of the screw jack; the rotary shafts are provided with limiting rings on both sides of the second guide rail.
2. The asphalt mixture rutting test apparatus as described in claim 1, capable of simulating vehicle slope driving and rainfall, is characterized in that... The temperature-conducting cavity is equipped with a spiral coil, and the space between the spiral coil and the temperature-conducting cavity is filled with a heat-conducting medium; the liquid inlet pipe of the spiral coil is connected to the liquid outlet of the temperature control component, and the liquid outlet pipe of the spiral coil is connected to the liquid inlet of the temperature control component; the liquid outlet of the temperature control component is equipped with a circulation pump, and the liquid outlet end of the circulation pump is equipped with a check valve.
3. The asphalt mixture rutting test apparatus for simulating vehicle slope driving and rainfall as described in claim 1, characterized in that, The lifting shaft is driven by two scissor lifts arranged side by side.
4. The asphalt mixture rutting test apparatus for simulating vehicle slope driving and rainfall as described in claim 1, characterized in that, A sewage tank is connected to one side of the drainage trough via a drainage pipe, and a filter screen is installed at the front end of the drainage pipe.
5. The asphalt mixture rutting test apparatus for simulating vehicle slope driving and rainfall as described in claim 1, characterized in that, The water spray assembly includes: a water tank located on the top of the housing, a water guide pipe connected to the water outlet of the water tank, and a water spray pipe connected to the end of the water guide pipe; a water spray switch is provided at the end of the water spray pipe, and a fan-shaped nozzle is provided downstream of the water spray switch.
6. The asphalt mixture rutting test apparatus for simulating vehicle slope driving and rainfall as described in claim 1, characterized in that, The rotary assembly includes: two symmetrically arranged side plates, a drive shaft and a driven shaft disposed between the two side plates, a sprocket, a chain, a support plate, an L-shaped connecting plate, and a drive motor; sprockets are fitted on both the drive shaft and the driven shaft; the chain is connected end to end and fitted onto the sprockets to form a closed rotary link; several support plates are equidistantly installed on the outside of the chain through the L-shaped connecting plate to form an annular rotary surface; the test wheel is mounted on the support plate; the output shaft of the drive motor is drively connected to the drive shaft.
7. The asphalt mixture rutting test apparatus for simulating vehicle slope driving and rainfall as described in claim 6, characterized in that, The test wheel includes: a positioning plate fixedly connected to a support plate, a U-shaped wheel frame, an electric push rod, a wheel body, and a storage battery; the positioning plate and the U-shaped wheel frame are connected by two electric push rods; the wheel body is rotatably mounted on the open end of the U-shaped wheel frame; the electric push rod is electrically connected to the storage battery.
8. The asphalt mixture rutting test apparatus for simulating vehicle slope driving and rainfall as described in claim 6, characterized in that, The two rotating shafts pass through the annular rotating surface of the rotating assembly and are fixedly connected to the side plate.
9. The asphalt mixture rutting test apparatus for simulating vehicle slope driving and rainfall as described in claim 6, characterized in that, Both the first and second guide rails are arc-shaped tracks, with the center of the arc of the second guide rail located at the bottom of the first guide rail; the arcs of the first and second guide rails are approximately the same; the width of the second guide rail is slightly greater than that of the first guide rail; an angle locking pin is provided on the lower outer wall of the first guide rail; the rotary shaft passing through the second guide rail is hinged to the end of the screw of the screw jack via a lifting lug; the rotary shaft passing through the first guide rail extends out of the gap between the bottom of the first guide rail and the angle locking pin.
10. The asphalt mixture rutting test apparatus for simulating vehicle slope driving and rainfall as described in claim 9, characterized in that, The first and second guide rails are provided with positioning pins on their upper outer walls, and the two rotating shafts pass through the gap between the top of the first and second guide rails and the positioning pins.