Fatigue test device for asphalt mixture
By designing a fatigue testing device that includes components such as a main body, experimental tank, motor housing, threaded rod, moving block, and rotating wheel, the problems of complex structure and single function of existing devices are solved. This enables accurate measurement and stable testing of the fatigue performance of asphalt mixtures, simulates vehicle load driving, measures tensile deformation strain and fatigue threshold, and ensures the stability and safety of the experiment.
Patent Information
- Application Number
- CN202422991230.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-05
- Publication Date
- 2025-11-07
- Estimated Expiration
- 2034-12-05
AI Technical Summary
Existing fatigue testing equipment for asphalt mixtures is complex in structure, expensive to operate, and has limited functionality. It cannot comprehensively measure various factors that affect fatigue, such as weight, acceleration, and temperature, resulting in inaccurate and unstable experimental results.
A fatigue testing device was designed, comprising components such as a main body, an experimental tank, a motor housing, a threaded rod, a moving block, a telescopic rod, and a rotating wheel. The device simulates vehicle load by applying pressure with a hydraulic press, measures strain and temperature changes using resistance strain gauges, regulates temperature using hot and cold air blowers, reduces noise with a sound insulation layer, and controls temperature stability with a thermal insulation layer, ensuring the stability and accuracy of the experiment.
It enables precise measurement of the fatigue performance of asphalt mixtures, simulates vehicle load driving, measures tensile deformation strain and fatigue threshold, ensures the stability and safety of the experiment, and reduces energy consumption and noise impact.
Smart Images
Figure CN223526179U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to asphalt sample fatigue test technical field, concretely relates to a kind of fatigue test device for asphalt mixture. BACKGROUND
[0002] Asphalt mixture is a kind of composite material, mainly by asphalt, coarse aggregate, fine aggregate, mineral powder are composed, some also add polymer and wood cellulose, by the material of these different quality and quantity are mixed to form different structure, and have different mechanical properties.Aspalt pavement is built under the repeated action of vehicle load Fatigue failure occurs, long-term stress-strain overlap changes state, cause pavement structure strength to gradually drop.When load repetition effect exceeds a certain number, stress generated in pavement under load will exceed the structure resistance after strength drop, make pavement crack, produce fatigue fracture damage, asphalt mixture of different material composition has difference in fatigue performance.
[0003] The existing equipment for testing the fatigue performance of asphalt mixture is divided into large-size structure test device for fatigue test damage of actual pavement under real automobile load and small-scale test device located in the indoor.The existing indoor small-scale test device is generally complex in structure, control and operation, and expensive in price, and has single function, and generally tests stress fatigue by pressure, and other conditions affecting fatigue, such as weight, acceleration and temperature, cannot be measured, therefore, it is particularly important to improve the existing fatigue test device for asphalt mixture, design a new fatigue test device for asphalt mixture to solve the above technical defects, and improve the practicability of the overall fatigue test device for asphalt mixture. UTILITY MODEL CONTENT
[0004] The utility model aims at providing a kind of fatigue test device for asphalt mixture, the fatigue test device for asphalt mixture can simulate vehicle load driving, measure the tensile deformation strain of asphalt mixture Fatigue threshold pressure, acceleration, suitable temperature threshold value etc., so that experimental result is more accurate, while guaranteeing the stability of experiment, improve the overall safety of fatigue test device for asphalt mixture, to solve the problems proposed in the above background.
[0005] To achieve the above object, the utility model provides the following technical scheme:
[0006] The utility model provides a fatigue testing device for asphalt mixture, including the main part, the one end of main part is equipped with the experiment groove, the inside rotationally connected with the rotating door of experiment groove, the inside fixedly connected with motor housing of experiment groove away from rotating door one end, the one end of motor housing is equipped with threaded rod in the inside of experiment groove and is located, the outside of threaded rod is equipped with moving block in the inside of experiment groove, the bottom fixedly connected with telescopic link outer sheath of moving block in the inside of experiment groove, the bottom of telescopic link outer sheell is equipped with connecting rod in the inside of experiment groove, both sides of connecting rod are all rotationally connected with rotating wheel.
[0007] As the preferred scheme of the utility model, the inside of the motor housing is provided with a motor, the driving end of the motor in the motor housing is fixedly connected with the threaded rod, and the threaded rod is rotationally connected with the main body at the end away from the motor housing.
[0008] As the preferred scheme of the utility model, the inside of the telescopic link outer sheath is provided with a telescopic link, and the driving end of the telescopic link in the telescopic link outer sheath is fixedly connected with the connecting rod at the end away from the rotating wheel.
[0009] As the preferred scheme of the utility model, the both sides of the main body are provided with a hot air blower and a cold air blower, the main body is connected with the two groups of hot air blowers and the two groups of cold air blowers through a plurality of connecting pipes, and the inside of the experiment groove and the top of the plurality of connecting pipes are fixedly connected with a fixed block.
[0010] As the preferred scheme of the utility model, the bottom of the rotating wheel and the inside of the experiment groove are provided with a receiving block, the inside of the experiment groove and the end of the receiving block away from the motor housing are fixedly connected with a limiting block, the side of the receiving block close to the limiting block and the outside of the limiting block are both provided with a slot, and the two groups of slots are connected through a limiting plate.
[0011] As the preferred scheme of the utility model, the top of the receiving block is provided with a receiving groove, the inside of the receiving groove and the end close to the slot are both fixedly connected with a clamping block, and the bottom of the receiving groove is provided with a plurality of resistance strain gauges distributed at equal intervals.
[0012] As the preferred scheme of the utility model, the top of the receiving block and the bottom of the motor housing are provided with a hydraulic press, the inside of the main body is provided with a thermal insulation layer, and the inside of the main body and the outside of the thermal insulation layer are provided with a sound insulation layer.
[0013] Compared with the prior art, the utility model has the advantages that:
[0014] 1. The utility model discloses a design of main body, experiment groove, motor shell, threaded rod, moving block, telescopic link shell, connecting rod, rotating wheel, bearing block, bearing groove, resistance strain gauge and hydraulic press, and the hydraulic press can gradually press the asphalt mixture, thereby measuring the pressure limit, the driving end of the motor in the motor shell rotates and drives the threaded rod to rotate, thereby driving the moving block to displace along the threaded rod, the driving end of the telescopic link in the telescopic link shell is pressed down, thereby driving the connecting rod to press down, thereby exerting pressure on the rotating wheel, thereby driving the rotating wheel to rotate and displace on the asphalt mixture, thereby simulating vehicle load driving and exerting periodic fixed moving wheel load on the asphalt mixture, thereby measuring the tensile deformation strain of the asphalt mixture, the fatigue threshold, and the resistance strain gauge is connected with a strain sensor, which can measure the pressure, acceleration and weight of the asphalt mixture under stress, making the experimental results more accurate.
[0015] 2. The utility model discloses a design of main body, experiment groove, limiting block, limiting plate, bearing block, slot, bearing groove, clamping block and hydraulic press, when the fatigue test device for asphalt mixture is put into use, the uncured asphalt mixture is poured into the bearing groove, after the asphalt mixture solidifies, the two groups of clamping blocks can prevent one end of the asphalt mixture from being stressed and the other end from being raised, thereby ensuring the stability of the experiment, the limiting plate and the slot can connect the limiting block and the bearing block, when the pressure head of the hydraulic press is pressed down to adhere to the asphalt mixture, the one end of the bearing block can be prevented from being stressed and the other end from being raised, thereby further ensuring the stability of the experiment.
[0016] 3. The utility model discloses a design of main body, experiment groove, hot -blast machine, cold -blast machine, connecting pipe, fixed block, bearing block, bearing groove, rotating door, heat preservation layer and sound insulation layer, when the fatigue test device for asphalt mixture is put into use, the fixed block ensures that the wind direction is towards the asphalt mixture, the hot -blast machine and the cold -blast machine all blow the air to the inside of experiment groove through the connecting pipe, thereby determining the suitable temperature threshold of the asphalt mixture and the performance under different temperatures, the sound insulation layer can reduce the influence of the noise generated by the device during the experiment on the surroundings, the heat preservation layer can reduce the influence of the external temperature on the inside of the main body, make the experiment groove heat up or cool down faster, keep for longer, and reduce the consumption of energy. ACCURACY
[0017] Figure 1 It is the whole structure schematic diagram of the utility model;
[0018] Figure 2 It is the main body of the utility model positive cross section structure schematic diagram;
[0019] Figure 3 It is the main body of the utility model side cross section structure schematic diagram;
[0020] Figure 4The utility model discloses a structure schematic drawing of bearing block.
[0021] In the drawing: 1, main body, 11, experimental tank, 12, limit block, 13, limit board, 2, motor shell, 21, threaded rod, 22, moving block, 3, telescopic rod shell, 31, connecting rod, 32, rotating wheel, 4, hot air blower, 41, cold air blower, 42, connecting pipe, 43, fixed block, 5, bearing block, 51, slot, 52, bearing groove, 53, clamping block, 54, resistance strain gauge, 6, hydraulic press, 7, rotating door, 8, heat preservation layer, 81, sound insulation layer. DETAILED DESCRIPTION
[0022] The technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the embodiments of the utility model, and apparently, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments, and all the other embodiments obtained by the ordinary skilled in the art on the basis of the embodiments in the utility model without making creative efforts belong to the protection scope of the utility model. EMBODIMENT
[0023] Please refer to Figures 1-4 The utility model provides a technical scheme:
[0024] The utility model provides a kind of fatigue test device for asphalt mixture, including main body 1, one end of main body 1 is equipped with experimental tank 11, rotating door 7 is rotatably connected in the inside of experimental tank 11, motor housing 2 is fixedly connected in the inside of experimental tank 11 and away from rotating door 7 one end, the end of motor housing 2 close to rotating door 7 and located in the inside of experimental tank 11 is equipped with threaded rod 21, the outside of threaded rod 21 and located in the inside of experimental tank 11 is equipped with moving block 22, the bottom of moving block 22 and located in the inside of experimental tank 11 is fixedly connected with telescopic rod housing 3, the bottom of telescopic rod housing 3 and located in the inside of experimental tank 11 is equipped with connecting rod 31, rotating wheel 32 is rotatably connected on the both sides of connecting rod 31, motor is equipped in the inside of motor housing 2, the drive end of motor in the inside of motor housing 2 is fixedly connected with threaded rod 21, the end of threaded rod 21 away from motor housing 2 is rotatably connected with main body 1, telescopic rod is equipped in the inside of telescopic rod housing 3, the drive end of telescopic rod in the inside of telescopic rod housing 3 is fixedly connected with the end of connecting rod 31 away from rotating wheel 32, when the fatigue test device for asphalt mixture is put into use, open power supply, the drive end of motor in the inside of motor housing 2 rotates to drive threaded rod 21 to rotate, to drive moving block 22 displacement along threaded rod 21, the drive end of telescopic rod in the inside of telescopic rod housing 3 is pressed down, to drive connecting rod 31 to press down, to exert pressure on rotating wheel 32, to drive rotating wheel 32 to rotate displacement on asphalt mixture, to simulate vehicle load driving, to exert periodic fixed moving wheel load on asphalt mixture, to measure the tensile deformation strain of asphalt mixture, to measure fatigue threshold.
[0025] Further, the both sides of main body 1 are equipped with hot air blower 4 and cold air blower 41, main body 1 is connected with two groups of hot air blower 4 and two groups of cold air blower 41 through multiple groups of connecting pipes 42, two groups of hot air blower 4 and cold air blower 41 are connected with main body 1 through connecting pipe 42, the inside of experimental tank 11 and the top of multiple groups of connecting pipes 42 are fixedly connected with fixed block 43, when the fatigue test device for asphalt mixture is put into use, open power supply, hot air blower 4 blows hot air to the inside of experimental tank 11 through connecting pipe 42, to experiment the high temperature resistance degree of asphalt mixture, cold air blower 41 blows cold air to the inside of experimental tank 11 through connecting pipe 42, to experiment the low temperature resistance degree of asphalt mixture, fixed block 43 guarantees that wind direction is towards asphalt mixture, to determine the suitable temperature threshold of asphalt mixture and performance under different temperatures.
[0026] The bottom of the rotating wheel 32 and inside the experimental tank 11 is provided with a receiving block 5, the inside of the experimental tank 11 and the end of the receiving block 5 away from the motor shell 2 is fixedly connected with a limiting block 12, the side of the receiving block 5 close to the limiting block 12 and the outside of the limiting block 12 are both provided with a slot 51, the two groups of slots 51 are connected through a limiting plate 13, the top of the receiving block 5 is provided with a receiving groove 52, the inside of the receiving groove 52 and the end close to the slot 51 and the end close to the motor shell 2 are both fixedly connected with a clamping block 53, the bottom of the receiving groove 52 is provided with a plurality of equally spaced resistance strain gauges 54, when the fatigue test device for asphalt mixture is put into use, the uncured asphalt mixture is poured into the receiving groove 52, after the asphalt mixture is solidified, the two groups of clamping blocks 53 can prevent one end of the asphalt mixture from being stressed and the other end from being raised, so as to ensure the stability of the experiment, the receiving block 5 containing the asphalt mixture is placed in the inside of the experimental tank 11, and then the limiting plate 13 is inserted into the slot 51 to connect the limiting block 12 and the receiving block 5, so as to prevent the end of the receiving block 5 close to the motor shell 2 from being stressed and the end close to the limiting block 12 from being raised, thereby ensuring the stability of the experiment, the resistance strain gauges 54 are connected with a strain sensor, which can measure the pressure, acceleration and weight of the asphalt mixture when the asphalt mixture is stressed, so that the experimental result is more accurate.
[0027] Secondly, the top of the receiving block 5 and the bottom of the motor shell 2 are provided with a hydraulic machine 6, the inside of the main body 1 is provided with a heat preservation layer 8, and the inside of the main body 1 and the outside of the heat preservation layer 8 are provided with a sound insulation layer 81, when the fatigue test device for asphalt mixture is put into use, the power supply is turned on, when the pressure head of the hydraulic machine 6 is pressed to adhere to the asphalt mixture, the end of the receiving block 5 close to the limiting block 12 can be prevented from being stressed and the end close to the hydraulic machine 6 from being raised, thereby ensuring the stability of the experiment, the hydraulic machine 6 can gradually press the asphalt mixture, so as to measure the pressure limit thereof, the sound insulation layer 81 can reduce the influence of the noise generated by the device during the experiment on the surrounding, the heat preservation layer 8 can reduce the influence of the external temperature on the inside of the main body 1, so that the heating or cooling speed of the experimental tank 11 is faster, the retention is longer, and the energy consumption is reduced.
[0028] In the embodiment, the specific implementation scenario is as follows: in actual use, when the fatigue test device for asphalt mixture is put into use, the un-solidified asphalt mixture is poured into the receiving groove 52, after the asphalt mixture is solidified, the two sets of clamping blocks 53 can prevent one end of the asphalt mixture from being stressed and the other end from being raised, thereby ensuring the stability of the experiment, the rotating door 7 is opened, the receiving block 5 containing the asphalt mixture is placed into the inside of the experimental tank 11, the limiting plate 13 is inserted into the insertion groove 51 to connect the limiting block 12 and the receiving block 5, thereby preventing the end of the receiving block 5 close to the motor shell 2 from being stressed and causing the end close to the limiting block 12 to be raised, when the pressure head of the hydraulic machine 6 is pressed to be attached to the asphalt mixture, the end of the receiving block 5 close to the limiting block 12 can be prevented from being stressed and causing the end close to the hydraulic machine 6 to be raised, thereby further ensuring the stability of the experiment, the rotating door 7 is closed, the hydraulic machine 6 can gradually press the asphalt mixture, thereby measuring the pressure limit of the asphalt mixture, the driving end of the motor in the motor shell 2 rotates to drive the threaded rod 21 to rotate, thereby driving the moving block 22 to displace along the threaded rod 21, the driving end of the telescopic rod in the telescopic rod shell 3 is pressed down, thereby driving the connecting rod 31 to be pressed down, thereby exerting pressure on the rotating wheel 32, thereby driving the rotating wheel 32 to rotate and displace on the asphalt mixture, thereby simulating the vehicle load driving, exerting periodic fixed moving wheel load on the asphalt mixture, thereby measuring the tensile deformation strain of the asphalt mixture, the fatigue threshold, the strain sensor connected to the resistance strain gauge 54 can measure the pressure, acceleration, weight and the like of the asphalt mixture when the asphalt mixture is stressed, so that the experimental results are more accurate, the air heater 4 blows hot air into the inside of the experimental tank 11 through the connecting pipe 42, thereby testing the high-temperature resistance of the asphalt mixture, the air cooler 41 blows cold air into the inside of the experimental tank 11 through the connecting pipe 42, thereby testing the low-temperature resistance of the asphalt mixture, the fixing block 43 ensures that the air direction is towards the asphalt mixture, thereby determining the suitable temperature threshold of the asphalt mixture and the performance of the asphalt mixture at different temperatures, the sound insulation layer 81 can reduce the influence of the noise generated by the device during the experiment on the surrounding, the heat preservation layer 8 can reduce the influence of the external temperature on the inside of the main body 1, so that the experimental tank 11 can be heated or cooled faster and for a longer time, thereby reducing the consumption of energy, compared with the existing fatigue test device for asphalt mixture, the overall practicability of the fatigue test device for asphalt mixture can be improved through the design.
[0029] Although the embodiments of the present application have been shown and described, it should be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.
Claims
1. A fatigue testing device for asphalt mixtures comprising a main body (1), characterized in that: One end of the main body (1) is provided with an experimental tank (11), the inside of the experimental tank (11) is rotatably connected with a rotating door (7), one end of the inside of the experimental tank (11) away from the rotating door (7) is fixedly connected with a motor housing (2), one end of the motor housing (2) close to the rotating door (7) and located in the inside of the experimental tank (11) is provided with a threaded rod (21), the outside of the threaded rod (21) and located in the inside of the experimental tank (11) is provided with a moving block (22), the bottom of the moving block (22) and located in the inside of the experimental tank (11) is fixedly connected with a telescopic rod housing (3), the bottom of the telescopic rod housing (3) and located in the inside of the experimental tank (11) is provided with a connecting rod (31), both sides of the connecting rod (31) are rotatably connected with rotating wheels (32).
2. The fatigue testing device for asphalt mixtures according to claim 1, characterized in that: The inside of the motor housing (2) is provided with a motor, the driving end of the motor in the motor housing (2) is fixedly connected with the threaded rod (21), one end of the threaded rod (21) away from the motor housing (2) is rotatably connected with the main body (1).
3. The fatigue testing device for asphalt mixtures according to claim 2, characterized in that: The inside of the telescopic rod housing (3) is provided with a telescopic rod, the driving end of the telescopic rod in the telescopic rod housing (3) is fixedly connected with one end of the connecting rod (31) away from the rotating wheel (32).
4. The fatigue testing device for asphalt mixtures of claim 3, wherein: Both sides of the main body (1) are provided with a hot air machine (4) and a cold air machine (41), the main body (1) is connected with two groups of hot air machines (4) and two groups of cold air machines (41) through a plurality of connecting pipes (42), the inside of the experimental tank (11) and located at the top of the plurality of connecting pipes (42) is fixedly connected with a fixed block (43).
5. A fatigue testing device for asphalt mixtures according to claim 4, characterized in that: The bottom of the rotating wheel (32) and located in the inside of the experimental tank (11) is provided with a receiving block (5), the inside of the experimental tank (11) and located at one end of the receiving block (5) away from the motor housing (2) is fixedly connected with a limiting block (12), one side of the receiving block (5) close to the limiting block (12) and the outside of the limiting block (12) are both provided with a slot (51), two groups of the slot (51) are connected through a limiting plate (13).
6. A fatigue testing device for asphalt mixtures according to claim 5, characterized in that: The top of the receiving block (5) is provided with a receiving groove (52), the inside of the receiving groove (52) and located at one end close to the slot (51) and one end close to the motor housing (2) are both fixedly connected with a clamping block (53), the bottom of the receiving groove (52) is provided with a plurality of equally spaced resistance strain gauges (54).
7. A fatigue testing device for asphalt mixtures according to claim 6, characterized in that: The top of the receiving block (5) and located at the bottom of the motor housing (2) is provided with a hydraulic machine (6), the inside of the main body (1) is provided with a heat preservation layer (8), the inside of the main body (1) and located outside the heat preservation layer (8) is provided with a sound insulation layer (81).