An asphalt mixture fatigue performance detection device

Abstract

The utility model provides a kind of asphalt mixture fatigue performance detection equipment, it is related to road engineering material detection field, including detection platform;The pressure cylinder is fixedly installed on the top upside of detection platform, and drive motor is fixedly installed on the bottom left side of pressure cylinder, and the bottom of detection platform is slidably connected with lifting chassis, and the upper side lower end surface of lifting chassis is symmetrically installed with adjusting oil cylinder on left and right sides, and the telescopic end top of adjusting oil cylinder is fixedly connected on the bottom end surface of detection platform, and scraper oil cylinder is fixedly installed on the oblique inner wall of the left and right ends front side of lifting chassis, and turnover assembly is equipped in the bottom middle of lifting chassis;The asphalt mixture fatigue performance detection equipment is linked with the design of adjusting oil cylinder and load groove, can flexibly adjust load groove height according to the actual filling thickness of asphalt mixture, effectively avoid the stress distortion problem caused by material thickness uneven, lay foundation for detection precision, to solve the problem that load groove height is insufficient, sample is unloaded and cleaned difficult.

Description

Technical Field

[0001] This utility model relates to the field of road engineering material testing technology, and in particular to a fatigue performance testing device for asphalt mixtures. Background Technology

[0002] As the core paving material of road structure, the service life of asphalt mixture directly depends on its fatigue resistance. Therefore, accurate testing of the fatigue performance of asphalt mixture is not only a key prerequisite for optimizing material ratio and improving road construction quality, but also a core basis for guiding the optimization of road design schemes and formulating scientific maintenance strategies. It has important practical significance for reducing engineering operation and maintenance costs and extending the service life of roads. The existing asphalt mixture fatigue performance testing equipment lacks adaptability in adjusting the height of the loading tank, making it difficult to adapt to the filling requirements of different asphalt mixtures. Moreover, the sample unloading process after testing is cumbersome, and the material residue is difficult to clean. Manual cleaning is not only inefficient, but also easily causes damage to the key load-bearing parts of the equipment, making it difficult to maintain the clean and flat test environment required for subsequent testing, thus affecting the continuity and stability of the testing process. Utility Model Content

[0003] This utility model relates to a fatigue performance testing device for asphalt mixtures, which solves the problems mentioned in the background art, such as insufficient adaptability of the loading tank height, inability to meet the filling requirements of different mixtures, cumbersome sample unloading, difficulty in cleaning residues, low efficiency of manual cleaning and easy damage to key parts of the equipment, and difficulty in ensuring a clean environment for subsequent testing.

[0004] This utility model provides a fatigue performance testing device for asphalt mixtures, specifically including: a testing platform; a pressure cylinder is fixedly installed on the upper top side of the testing platform, a drive motor is fixedly installed on the bottom left side of the pressure cylinder, a lifting frame is slidably connected to the bottom of the testing platform, adjusting cylinders are symmetrically installed on the left and right sides of the upper lower end face of the lifting frame, the top of the telescopic end of the adjusting cylinder is fixedly connected to the bottom end face of the testing platform, scraper cylinders are fixedly installed on the inclined inner walls of the front sides of the left and right ends of the lifting frame, and a flipping component is provided at the middle of the bottom of the lifting frame.

[0005] Furthermore, a testing top frame is fixedly installed on the top of the testing platform, and a pressure cylinder is fixedly installed in the middle of the top end face of the testing top frame. A lifting platform is fixedly connected to the bottom of the telescopic end of the pressure cylinder, and a long strip-shaped sliding guide groove is opened in the middle of the bottom end face of the lifting platform.

[0006] Furthermore, a drive screw is fixedly connected to the right end of the drive shaft of the drive motor, and a pressure block is threadedly connected to the drive screw. The top end face of the pressure block is slidably connected to a sliding guide groove opened on the bottom end face of the lifting platform connected to the bottom of the extension end of the pressure cylinder. A temperature simulation roller is rotatably connected to the middle of the bottom end face of the pressure block.

[0007] Furthermore, a loading groove is provided at the middle of the top end face of the lifting base, the interior of the loading groove is through, and the outer wall of the loading groove is slidably connected to the middle of the detection platform.

[0008] Furthermore, the left and right sides of the bottom of the lifting base are triangular, and material scrapers are fixedly installed on the front inner wall of the triangular structure at the bottom of the lifting base at the opposite telescopic ends of the two scraper cylinders.

[0009] Furthermore, the flipping assembly includes a control cylinder, a connecting frame, and a flipping base plate. The control cylinder is hinged to the middle of the bottom end face of the front side of the lifting base. The connecting frame is hinged to the telescopic rear end of the control cylinder. The connecting frame is triangular in shape. The front and rear ends of the top of the connecting frame are connected to the bottom end face of the flipping base plate. The front ends of the left and right side walls of the flipping base plate are hinged to the front bottom of the loading slot of the lifting base plate.

[0010] This utility model provides a device for testing the fatigue performance of asphalt mixtures, which has the following beneficial effects: 1. By adjusting the linkage design between the hydraulic cylinder and the loading trough, the height of the loading trough can be flexibly adjusted according to the actual filling thickness of the asphalt mixture, effectively avoiding the problem of stress distortion caused by uneven material thickness, laying the foundation for detection accuracy. By controlling the hydraulic cylinder to drive the flipping base plate to flip, the sample can be quickly detached under gravity. For the residual mixture with strong adhesion, the symmetrically arranged scraper cylinders can drive the material scraper to accurately scrape off the residue, realizing the automated cleaning of the detection platform. This avoids damage to the equipment caused by manual cleaning and ensures that the surface of the loading trough and the flipping base plate is clean and flat.

[0011] 2. By utilizing the synergistic effect of a pressure cylinder, drive motor, and temperature simulation roller, the continuous compaction condition during vehicle operation is realistically reproduced. The reciprocating compaction of the temperature simulation roller accurately replicates the fatigue damage process of asphalt mixture under repeated vehicle wheel action. By adjusting the temperature of the temperature simulation roller, the property changes of asphalt mixture under high temperature are simulated. Compared with traditional testing equipment, the testing scenario is closer to the actual road surface conditions, ensuring that the test results can objectively and accurately reflect the fatigue failure law of asphalt mixture in actual use, and providing reliable data support for the performance evaluation of asphalt mixture. Attached Figure Description

[0012] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings of the embodiments will be briefly described below.

[0013] The accompanying drawings described below are only related to some embodiments of the present invention and are not intended to limit the scope of the present invention.

[0014] In the attached diagram: Figure 1This is a schematic diagram of the right front side axial view structure of this utility model; Figure 2 This is a schematic diagram of the bottom rear side of the structure of this utility model from below; Figure 3 This is a schematic diagram of the front axial view structure of this utility model after disassembly; Figure 4 This is a schematic diagram of the disassembled, bottom-view structure of this utility model; Figure 5 This is a schematic diagram of the disassembly structure of the flipping component of this utility model; Figure 6 This is a cross-sectional structural diagram of the lifting base frame of this utility model.

[0015] In the diagram, the correspondence between component names and drawing numbers is as follows: 1. Testing platform; 101. Testing top frame; 2. Pressure cylinder; 201. Lifting platform; 202. Sliding guide groove; 3. Drive motor; 301. Drive screw; 4. Pressure block; 401. Temperature simulation roller; 5. Lifting base frame; 501. Loading trough; 6. Adjusting cylinder; 7. Control cylinder; 8. Connecting frame; 9. Tilting base plate; 10. Scraper cylinder; 11. Material scraper. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the described embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0017] Example 1: As shown in the attached document Figure 1 To be continued Figure 6 As shown: This utility model provides a fatigue performance testing device for asphalt mixtures, comprising: a testing platform 1, a pressure cylinder 2 fixedly installed on the top upper side of the testing platform 1, a drive motor 3 fixedly installed on the bottom left side of the pressure cylinder 2, a lifting frame 5 slidably connected to the bottom of the testing platform 1, adjusting cylinders 6 symmetrically installed on the left and right sides of the upper lower end face of the lifting frame 5, the top of the telescopic end of the adjusting cylinder 6 fixedly connected to the bottom end face of the testing platform 1, scraper cylinders 10 fixedly installed on the inclined inner walls of the front sides of the left and right ends of the lifting frame 5, and a tilting mechanism located at the middle of the bottom of the lifting frame 5. The rotating assembly has a loading trough 501 located in the middle of the top end face of the lifting base 5. The interior of the loading trough 501 is through-hole. The outer wall of the loading trough 501 is slidably connected to the middle of the testing platform 1. Specifically, the adjusting cylinder 6, which is symmetrically installed at the bottom of the lifting base 5, is connected to the bottom end face of the testing platform 1. The distance between the lifting base 5 and the testing platform 1 can be controlled by adjusting the cylinder 6, so as to adjust the height of the loading trough 501 in a timely manner. This allows for adjustment based on the thickness of the asphalt mixture when filling the loading trough 501.

[0018] The testing platform 1 has a testing top frame 101 fixedly installed on its top. A pressure cylinder 2 is fixedly installed at the middle of the top end face of the testing top frame 101. A lifting platform 201 is fixedly connected to the bottom of the telescopic end of the pressure cylinder 2. A long sliding guide groove 202 is opened at the middle of the bottom end face of the lifting platform 201. A drive screw 301 is fixedly connected to the right end of the drive shaft of the drive motor 3. A pressure block 4 is threaded onto the drive screw 301. The top end face of the pressure block 4 is slidably connected to the sliding guide groove 202 opened at the bottom end face of the lifting platform 201 connected to the bottom of the telescopic end of the pressure cylinder 2. A temperature simulation roller 401 is rotatably connected to the middle of the bottom end face of the pressure block 4. Specifically, by changing the height of the lifting platform 201 connected to the bottom telescopic end of the pressure cylinder 2, the lifting platform 201 is brought closer to the loading slot 501 on the top of the lifting base frame 5. The distance between the lifting platform 201 and the top loading slot 501 of the lifting base 5 is precisely controlled, so that the pressure block 4, which is slidably connected at the bottom of the lifting platform 201, makes effective contact with the asphalt mixture in the loading slot 501. The drive motor 3 drives the drive screw 301 to rotate, and the pressure block 4 is driven to slide back and forth along the sliding guide slot 202 through the threaded transmission. This causes the temperature simulation roller 401 at the bottom of the pressure block 4 to continuously and repeatedly roll on the surface of the asphalt mixture. This can realistically reproduce the continuous rolling condition of the road surface when the vehicle is driving, simulate the fatigue damage process of the asphalt mixture under the repeated action of the wheel, and simulate the chemical change of the asphalt mixture at different temperatures by adjusting the temperature of the temperature simulation roller 401. This makes the test scenario more in line with the actual environment and ensures that the test results can objectively reflect the fatigue failure law of the asphalt mixture in actual use.

[0019] The tilting assembly includes a control cylinder 7, a connecting frame 8, and a tilting base plate 9. The control cylinder 7 is hinged to the middle of the bottom front end face of the lifting base 5. The connecting frame 8 is hinged to the telescopic rear end of the control cylinder 7. The connecting frame 8 is triangular in shape, and its top front and rear ends are connected to the bottom end face of the tilting base plate 9. The front ends of the left and right side walls of the tilting base plate 9 are hinged to the bottom front side of the loading trough 501 of the lifting base 5. Specifically, after the test is completed, the telescopic end of the control cylinder 7 retracts, and with the transmission action of the connecting frame 8, the tilting base plate 9 is pulled to tilt around the hinge points of its left and right side walls as the axis, so that the asphalt mixture sample in the loading trough 501 falls off naturally under the action of gravity, realizing the rapid unloading of the sample after the test.

[0020] The bottom of the lifting base 5 is triangular on both sides. On the inner front wall of the triangular structure at the bottom of the lifting base 5, two scraper cylinders 10 are fixedly installed with material scrapers 11 at their opposite telescopic ends. Specifically, when some of the asphalt mixture with strong adhesion remains on the flipping base plate 9 and is difficult to fall off naturally, the two symmetrically arranged scraper cylinders 10 are activated. Their opposite telescopic ends drive the material scrapers 11 to slide precisely along the upper surface of the flipping base plate 9, which can thoroughly scrape off the residual material and ensure that there is no debris left on the surface of the loading trough 501 and the flipping base plate 9. This realizes the automated cleaning of the testing platform 1 and provides a clean and flat test environment for the next test.

[0021] The specific usage and function of this embodiment are as follows: When using this asphalt mixture fatigue performance testing equipment, the height of the loading trough 501 is precisely controlled by adjusting the extension and retraction of the hydraulic cylinders 6 symmetrically installed at the bottom of the lifting frame 5 to match the filling thickness of the asphalt mixture. After the mixture is filled, the pressure cylinder 2 on the testing top frame 101 is activated to drive the lifting platform 201 to descend, so that the temperature simulation roller 401 at the bottom of the pressure block 4 can effectively contact the mixture. Then, the drive motor 3 drives the drive screw 301 to rotate, driving the pressure block 4 to slide back and forth along the sliding guide groove 202, so that the temperature simulation roller 401 can effectively contact the mixture. The continuous reciprocating rolling simulates fatigue damage testing under the action of actual wheels. After the test is completed, the control cylinder 7 at the bottom of the lifting base 5 retracts, and the triangular connecting frame 8 pulls the flipping base 9 to flip around the hinge point, so that the mixture sample falls off naturally under the action of gravity. If there is a strong adhesive mixture remaining on the flipping base 9, the two scraper cylinders 10 on the triangular structure at the bottom of the lifting base 5 are activated to drive the material scraper 11 to slide along the upper surface of the flipping base 9 to completely scrape off the residual material, completing the automated cleaning of the testing platform 1 and preparing for the next test.

[0022] Example 2: A receiving cavity is opened inside the pressure block 4, and a pressure grading cylinder is fixedly installed in the receiving cavity. The telescopic end of the pressure grading cylinder passes through the bottom of the pressure block 4 and is hinged to the rotating shaft of the temperature simulation roller 401. The outer peripheral wall of the temperature simulation roller 401 is detachably fitted with rubber sleeves of different hardness. The pressure grading cylinder is electrically connected to an external hydraulic control system. The rolling pressure of the temperature simulation roller 401 on the mixture is adjusted by the telescopic extension of the pressure grading cylinder. It is suitable for the driving conditions of vehicles with different load levels, such as small cars and heavy trucks. The detachable rubber can be replaced according to the testing requirements to restore the friction and pressure transmission characteristics of different tire materials on the road surface.

Claims

1. A fatigue performance testing device for asphalt mixtures, characterized in that, The system includes a testing platform (1); a pressure cylinder (2) is fixedly installed on the top upper side of the testing platform (1), a drive motor (3) is fixedly installed on the bottom left side of the pressure cylinder (2), a lifting base (5) is slidably connected to the bottom of the testing platform (1), and adjusting cylinders (6) are symmetrically installed on the left and right sides of the upper lower end face of the lifting base (5). The top of the telescopic end of the adjusting cylinder (6) is fixedly connected to the bottom end face of the testing platform (1), and scraper cylinders (10) are fixedly installed on the inclined inner wall of the left and right ends of the lifting base (5). A flipping component is provided at the bottom middle of the lifting base (5).

2. The fatigue performance testing equipment for asphalt mixtures according to claim 1, characterized in that, The top of the testing platform (1) is fixedly installed with a testing top frame (101), and a pressure cylinder (2) is fixedly installed at the middle of the top end face of the testing top frame (101). The bottom of the telescopic end of the pressure cylinder (2) is fixedly connected with a lifting platform (201), and a long strip-shaped sliding guide groove (202) is opened at the middle of the bottom end face of the lifting platform (201).

3. The fatigue performance testing equipment for asphalt mixtures according to claim 1, characterized in that, The right end of the drive shaft of the drive motor (3) is fixedly connected to a drive screw (301), and a pressure block (4) is threadedly connected to the drive screw (301). The top end face of the pressure block (4) is slidably connected to the sliding guide groove (202) opened on the bottom end face of the lifting platform (201) connected to the bottom of the telescopic end of the pressure cylinder (2). A temperature simulation roller (401) is rotatably connected to the middle of the bottom end face of the pressure block (4).

4. The fatigue performance testing equipment for asphalt mixtures according to claim 1, characterized in that, The lifting base (5) has a loading groove (501) in the middle of the top end face. The inside of the loading groove (501) is through, and the outer wall of the loading groove (501) is slidably connected to the middle of the detection platform (1).

5. The fatigue performance testing equipment for asphalt mixtures according to claim 1, characterized in that, The bottom of the lifting base (5) is triangular on the left and right sides. The two scraper cylinders (10) fixedly installed on the inner front wall of the triangular structure at the bottom of the lifting base (5) are both fixedly equipped with material scrapers (11) at their opposite telescopic ends.

6. The fatigue performance testing equipment for asphalt mixtures according to claim 1, characterized in that, The flipping assembly includes a control cylinder (7), a connecting frame (8), and a flipping base plate (9). The control cylinder (7) is hinged to the middle of the bottom end face of the front side of the lifting base (5). The extension and retraction rear end of the control cylinder (7) is hinged to the connecting frame (8). The connecting frame (8) is triangular in shape. The front and rear ends of the top of the connecting frame (8) are connected to the bottom end face of the flipping base plate (9). The front ends of the left and right side walls of the flipping base plate (9) are hinged to the bottom front side of the loading slot (501) of the lifting base (5).

Images