A baffle device for testing the fatigue performance of asphalt mixtures

Abstract

This utility model relates to the field of asphalt mixture testing technology and discloses a baffle device for testing the fatigue performance of asphalt mixtures. The device includes a base, a testing platform on top of the base, and support plates vertically mounted on both sides of the testing platform's bottom. The bottom of the support plates is connected to the base. This utility model uses a lifting assembly to apply pressure to the asphalt mixture using a pressure block until it breaks. Testing personnel can observe changes in the pressure sensor readings and record relevant real-time data, facilitating fatigue performance analysis of the asphalt mixture. The internal threaded sleeve, external threaded sleeve, and support sleeve ensure smooth lifting and sliding of the pressure sensor and pressure block, facilitating maintenance and repair of the pressure sensor and pressure block components that have the longest contact time with the asphalt mixture at the bottom of the support column. The waste-blocking assembly prevents debris from contaminating the surrounding environment of the testing device, promoting the continuous operation of asphalt mixture testing.

Description

Technical Field

[0001] This utility model relates to the field of asphalt mixture testing technology, specifically a baffle device for testing the fatigue performance of asphalt mixtures. Background Technology

[0002] Asphalt mixture is a composite material made by mixing mineral aggregates and asphalt binders in a specific ratio. It is mainly used in road construction. Before asphalt mixture is actually produced and used in road construction, testing personnel will conduct fatigue performance tests on the asphalt mixture. Through testing, the structural strength and durability of the asphalt mixture can be evaluated, thereby providing a scientific basis for road maintenance and technical support for road construction.

[0003] Existing asphalt mixture fatigue performance testing isolation devices require impacting and compacting the asphalt mixture to a fracture state to simulate fatigue damage under different road conditions. However, due to the lack of a mechanism to isolate the asphalt mixture fragments during this process, some fragments may fall outside the testing device due to the rebound and displacement of the asphalt mixture after it is impacted and compacted. This will have a certain impact on the testing environment and is not conducive to the fatigue performance testing of asphalt mixtures. Utility Model Content

[0004] The purpose of this invention is to provide a baffle device for testing the fatigue performance of asphalt mixtures, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a barrier device for testing the fatigue performance of asphalt mixtures, comprising:

[0006] The base has a testing platform on top of it. Support plates are vertically installed on the bottom of both sides of the testing platform. The bottom of the support plates is connected to the base. A control panel is fixedly connected to one side of the testing platform. A controller is installed inside the control panel.

[0007] A hopper is installed inside the testing platform. The hopper is equipped with a clamping assembly for positioning and fixing the asphalt mixture. The top of the hopper is equipped with a waste-blocking assembly that can separate asphalt mixture fragments during the testing process.

[0008] A U-shaped frame is installed above the hopper. The U-shaped frame has a support column inside, and a pressure sensor is fixedly connected to the bottom of the support column. A pressure block is installed at the bottom of the pressure sensor. The U-shaped frame has a lifting component on the outside that can adjust the height of the pressure block.

[0009] Preferably, the clamping assembly includes a U-shaped frame disposed at the top of the inner cavity of the hopper. There are two U-shaped frames arranged in a mirror image. One side of the U-shaped frame is connected to the hopper. A first hydraulic cylinder is fixedly installed on the top of the U-shaped frame. The bottom end of the first hydraulic cylinder extends into the interior of the U-shaped frame and is fixedly connected to a pressure plate. The first hydraulic cylinder is connected to the controller terminal via a data cable.

[0010] Preferably, the lifting assembly includes vertical plates disposed on both sides of the U-shaped frame. The bottom end of the vertical plates is connected to the detection platform. Support seats are vertically installed on the opposite sides of the two vertical plates. A second hydraulic cylinder is fixedly installed on the top of the support seat. The top end of the second hydraulic cylinder is connected to the U-shaped frame. The second hydraulic cylinder and the pressure sensor are both connected to the controller terminal via data cables.

[0011] Preferably, sliders are fixedly connected to both sides of the U-shaped frame, and grooves corresponding to the sliders are opened on the side of the two vertical plates that are close to each other, with the sliders located inside the grooves.

[0012] Preferably, the waste blocking component includes fixed seats disposed on both sides of the hopper, the fixed seats being located above the detection platform, the fixed seats having an internal receiving cavity, two U-shaped plates symmetrically disposed between the fixed seats, and a telescopic sleeve being provided between the U-shaped plates and the hopper, the telescopic sleeve being connected to the U-shaped plates and the hopper respectively.

[0013] Preferably, both ends of the U-shaped plate are fixedly connected to rotating shafts, which are rotatably connected to both sides of the inner wall of the receiving cavity via bearings. One end of each of the two rotating shafts extends through to the outside of the fixed base and is fixedly connected to a worm gear. A drive motor is fixedly installed on one side of the detection table, and a worm is fixedly connected to the output end of the drive motor. The worm meshes with the worm gears on both sides. The drive motor is connected to the controller terminal via a data cable.

[0014] Preferably, each of the two U-shaped plates has a recessed groove corresponding to the support column on the side that is close to each other.

[0015] Preferably, a waste collection box is provided below the hopper, and the waste collection box is located at the top of the base.

[0016] Preferably, the U-shaped frame has a strip plate inside, which is connected to both sides of the inner wall of the U-shaped frame. A support sleeve is fixedly connected to the top of the strip plate, and an external threaded sleeve is fixedly connected to the outside of the support sleeve. Multiple strip-shaped through grooves are symmetrically opened inside the external threaded sleeve. The top of the external threaded sleeve has a first conical surface. The axis of the support column and the support sleeve are in the same plane. The top of the support column extends to the outside of the support sleeve and has an internal threaded sleeve. The top of the inner cavity of the internal threaded sleeve has a second conical surface corresponding to the first conical surface. The internal threaded sleeve and the external threaded sleeve are connected by threads.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0018] This invention uses a lifting assembly to apply pressure to the asphalt mixture until it breaks. Testing personnel can observe changes in the pressure sensor readings and record relevant real-time data, facilitating subsequent fatigue performance analysis of the asphalt mixture. The internal and external threaded sleeves and support sleeve ensure the support column can smoothly lift and slide with the pressure sensor and pressure block, while also facilitating maintenance and repair of the pressure sensor and pressure block components at the bottom of the support column, where they have the longest contact time with the asphalt mixture. The waste-blocking assembly prevents fragments from falling outside the telescopic sleeve due to asphalt mixture breakage, avoiding environmental contamination and ensuring the continuous operation of asphalt mixture testing. Attached Figure Description

[0019] Figure 1 A schematic diagram of the main structure of the baffle device for testing the fatigue performance of asphalt mixtures provided by this utility model;

[0020] Figure 2 A schematic diagram of the rear view structure provided for this utility model;

[0021] Figure 3 A schematic diagram of the specific structure of the telescopic sleeve provided by this utility model;

[0022] Figure 4 A schematic diagram of the waste-blocking component provided by this utility model;

[0023] Figure 5 A schematic diagram of the specific structure of the external threaded sleeve provided by this utility model;

[0024] Figure 6 A schematic diagram of the specific structure of the support sleeve provided by this utility model.

[0025] In the diagram: 1. Base; 2. Detection table; 3. Support plate; 4. Control panel; 5. Hopper; 6. Waste blocking assembly; 61. Fixed seat; 62. Receiving cavity; 63. U-shaped plate; 64. Telescopic sleeve; 7. Relief groove; 8. Rotating shaft; 9. Worm gear; 10. Drive motor; 11. Worm; 12. Clamping assembly; 121. U-shaped frame; 122. First hydraulic cylinder; 123. Pressure plate; 14. U-shaped frame; 15. Support column; 16. Pressure sensor; 17. Pressure block; 18. Lifting assembly; 181. Vertical plate; 182. Support seat; 183. Second hydraulic cylinder; 19. Slider; 20. Slide groove; 21. Waste collection box; 22. Support sleeve; 23. External threaded sleeve; 24. Strip through groove; 25. First conical surface; 26. Internal threaded sleeve; 27. Second conical surface; 28. Strip plate. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Please see Figure 1-6As shown, a barrier device for testing the fatigue performance of asphalt mixtures includes a base 1, a testing platform 2 on top of the base 1, and support plates 3 vertically mounted on the bottom of both sides of the testing platform 2. The bottom of the support plates 3 is connected to the base 1. A control panel 4 is fixedly connected to one side of the testing platform 2. A controller is installed inside the control panel 4. The controller inside the control panel 4 can realize centralized control of other electronic devices, which facilitates the coordination of the operation of various electronic devices and helps to improve the degree of automation and intelligence. It should be noted that the controller can be a PLC controller or an integrated motherboard. A hopper 5 is installed inside the testing platform 2. The hopper 5 is equipped with a clamping component 12 for positioning and fixing the asphalt mixture. By setting the clamping component 12, the asphalt mixture to be tested can be positioned and fixed from both ends. The top of the hopper 5 is equipped with a device for testing. The waste-blocking component 6 is used to isolate asphalt mixture fragments during the testing process. By setting up the waste-blocking component 6, some fragments generated by the fracture of asphalt mixture can be blocked, thereby avoiding the fragments from polluting the environment around the testing device and facilitating the continuous testing of asphalt mixture. The U-shaped frame 14 is set above the hopper 5. The U-shaped frame 14 has a support column 15 inside. The bottom end of the support column 15 is fixedly connected to a pressure sensor 16. A pressure block 17 is installed at the bottom of the pressure sensor 16. The outside of the U-shaped frame 14 is equipped with a lifting component 18 that can adjust the height of the pressure block 17. By setting up the lifting component 18, the pressure block 17 at the bottom of the support column 15 can apply pressure to the asphalt mixture until it breaks. The testing personnel can observe the changes in the test value of the pressure sensor 16 and record the relevant real-time data, which can facilitate the subsequent fatigue performance analysis of the asphalt mixture.

[0028] The clamping assembly 12 includes two U-shaped frames 121 disposed at the top of the inner cavity of the hopper 5, arranged in a mirror image. One side of each U-shaped frame 121 is connected to the hopper 5. A first hydraulic cylinder 122 is fixedly mounted on the top of each U-shaped frame 121. The bottom end of the first hydraulic cylinder 122 extends into the interior of the U-shaped frame 121 and is fixedly connected to a pressure plate 123. The first hydraulic cylinder 122 is connected to the controller terminal via a data cable. Figure 3 , Figure 4 As shown, before conducting the testing, the staff can place both ends of the asphalt mixture to be tested into the two U-shaped frames 121 respectively, and then use the first hydraulic cylinder 122 to drive the pressure plate 123 to contact the asphalt mixture to be tested, thereby positioning and fixing it from both ends of the asphalt mixture to be tested, which facilitates the subsequent testing work.

[0029] The lifting assembly 18 includes vertical plates 181 disposed on both sides of the U-shaped frame 14. The bottom end of the vertical plates 181 is connected to the detection table 2. Support seats 182 are vertically installed on the opposite sides of the two vertical plates 181. A second hydraulic cylinder 183 is fixedly installed on the top of the support seat 182. The top end of the second hydraulic cylinder 183 is connected to the U-shaped frame 14. The second hydraulic cylinder 183 and the pressure sensor 16 are both connected to the controller terminal via data cables. Figure 1 , Figure 2 As shown, the second hydraulic cylinder 183 can drive the U-shaped frame 14 to move downward as a whole. As the pressure applied to the asphalt mixture by the bottom pressure block 17 of the support column 15 gradually increases, the asphalt mixture will break. At this time, the staff can judge the fatigue performance of the asphalt mixture by observing the change in the detection value of the pressure sensor 16.

[0030] Both sides of the U-shaped frame 14 are fixedly connected to sliders 19. On the side of the two vertical plates 181 that are close to each other, there are grooves 20 corresponding to the sliders 19. The sliders 19 are located inside the grooves 20. Figure 1 , Figure 2 As shown, by setting the slide groove 20 and the slider 19, the U-shaped frame 14 can remain smooth during the descent, which is beneficial to improving the working stability of the lifting assembly 18.

[0031] The waste-blocking assembly 6 includes fixed seats 61 disposed on both sides of the hopper 5. The fixed seats 61 are located above the detection table 2. Each fixed seat 61 has an internal receiving cavity 62. Two U-shaped plates 63 are symmetrically arranged between the fixed seats 61. Telescopic sleeves 64 are provided between the U-shaped plates 63 and the hopper 5, and the telescopic sleeves 64 are connected to both the U-shaped plates 63 and the hopper 5. Figure 3 , Figure 4 As shown, the U-shaped plate 63 can drive the telescopic sleeve 64 to extend or retract. When the two U-shaped plates 63 are combined, the telescopic sleeve 64 will achieve all-round isolation on the outside of the hopper 5, thereby preventing the fragments generated by the breakage of the asphalt mixture from falling on the outside of the telescopic sleeve 64, avoiding the fragments from polluting the environment around the testing device, and facilitating the continuous operation of asphalt mixture testing.

[0032] Both ends of the U-shaped plate 63 are fixedly connected to rotating shafts 8. The rotating shafts 8 are rotatably connected to both sides of the inner wall of the receiving cavity 62 via bearings. One end of each rotating shaft 8 extends through to the outside of the fixed base 61 and is fixedly connected to a worm gear 9. A drive motor 10 is fixedly installed on one side of the detection table 2. A worm 11 is fixedly connected to the output end of the drive motor 10, and the worm 11 meshes with the worm gears 9 on both sides. The drive motor 10 is connected to the controller terminal via a data cable. Figure 2 , Figure 3 and Figure 4As shown, during the inspection, the lifting assembly 18 can move the pressure block 17 down a certain distance first. Then, the drive motor 10 drives the worm gear 11 to rotate. The worm gear 11 then drives the U-shaped plate 63 to swing around the rotating shaft 8 through the worm wheel 9. At this time, the pressure block 17 is located inside the telescopic sleeve 64. After the inspection is completed, the telescopic sleeve 64 can be retracted by the cooperation between the drive motor 10, the worm gear 11 and the worm wheel 9. At this time, the pressure block 17 can leave the telescopic sleeve 64. This not only prevents the telescopic sleeve 64 from obstructing the up and down movement of the pressure block 17, but also avoids the telescopic sleeve 64 from affecting the loading and unloading of asphalt mixture.

[0033] On the side of each of the two U-shaped plates 63 that are close to each other, there is a relief groove 7 corresponding to the support column 15, such as Figure 3 , Figure 4 As shown, by setting the relief groove 7, the U-shaped plate 63 can be prevented from obstructing the vertical displacement of the support column 15.

[0034] A waste collection box 21 is located below the hopper 5, and the waste collection box 21 is located on top of the base 1, such as... Figure 1 , Figure 2 As shown, by setting up the waste collection box 21, the fragments generated by the fracture of the asphalt mixture can be collected and recycled in a centralized manner, thus improving its practicality.

[0035] The U-shaped frame 14 has strip plates 28 inside, which are connected to both sides of the inner wall of the U-shaped frame 14. A support sleeve 22 is fixedly connected to the top of the strip plate 28, and an external threaded sleeve 23 is fixedly connected to the outside of the support sleeve 22. The external threaded sleeve 23 has multiple symmetrically arranged strip grooves 24 inside, and a first conical surface 25 at its top. The axis of the support column 15 and the support sleeve 22 are in the same plane. The top of the support column 15 extends to the outside of the support sleeve 22 and has an internal threaded sleeve 26. The top of the inner cavity of the internal threaded sleeve 26 has a second conical surface 27 corresponding to the first conical surface 25. The internal threaded sleeve 26 and the external threaded sleeve 23 are connected by threads. Figure 1 , Figure 5 and Figure 6As shown, by opening multiple strip-shaped through grooves 24 inside the external threaded sleeve 23, multiple elastic clamping flap structures can be formed at the top of the external threaded sleeve 23. As the internal threaded sleeve 26 is continuously tightened on the external threaded sleeve 23, the second conical surface 27 on the inner wall of the internal threaded sleeve 26, in conjunction with the first conical surface 25 on the outer wall of the external threaded sleeve 23, can force the multiple clamping flaps to tightly position and fix the support column 15. At this time, the support column 15 is supported by the U-shaped frame 14 and the strip plate 28, which on the one hand enhances the overall stability of the support column 15 and ensures that the support column 15 can smoothly rise and fall and slide with the pressure sensor 16 and the pressure block 17. On the other hand, after the internal threaded sleeve 26 is removed from the external threaded sleeve 23 to release the positioning and fixing of the support column 15 by the multiple clamping flaps, the support column 15 can then be lifted. The lifting component 18, which drives the U-shaped frame 14 to rise, can easily remove the entire support column 15. This facilitates the maintenance and repair of the pressure sensor 16 and the pressure block 17 components at the bottom of the support column 15, which have the longest contact time with the asphalt mixture. This also facilitates the overall disassembly, assembly, and maintenance of the support column 15. It should be noted that, in order to prevent the support column 15 from slipping during the asphalt mixture performance testing process, the gap between the support column 15 and the U-shaped frame 14 should be sealed. After sealing, the friction between the support column 15 and the U-shaped frame 14 is increased. Combined with the multiple clamping flaps on the external threaded sleeve 23, this can effectively resist the reaction force from the pressure block 17 during the downward pressing process. This can prevent the failure of the asphalt mixture performance test due to the slippage of the support column 15.

[0036] Working principle: First, the staff can position and fix the asphalt mixture to be tested from both ends using the clamping component 12, which facilitates subsequent testing. Then, the lifting component 18 drives the pressure block 17 to apply pressure to the asphalt mixture until it breaks. The testing personnel observe the changes in the detection value of the pressure sensor 16 and record the relevant real-time data, which facilitates the subsequent fatigue performance analysis of the asphalt mixture. During the asphalt mixture testing process, the internal threaded sleeve 26, the external threaded sleeve 23, and the support sleeve 22 enhance the overall stability of the support column 15, ensuring that the support column 15 can smoothly lift and slide with the pressure sensor 16 and the pressure block 17. On the other hand, after removing the internal threaded sleeve 26 from the external threaded sleeve 23 to release the multiple clamping petals from the positioning and fixing of the support column 15, it is convenient to maintain and repair the pressure sensor 16 and the pressure block 17 components at the bottom of the support column 15, which have the longest contact time with the asphalt mixture. Furthermore, the waste blocking component 6 prevents the fragments generated by the asphalt mixture breakage from falling outside the telescopic sleeve 64, avoiding fragment contamination of the surrounding environment of the testing device and facilitating the continuous operation of the asphalt mixture testing work.

[0037] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0038] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A barrier device for use in testing the fatigue performance of an asphalt mixture, characterized in that include: A base (1) is provided above the base (1), and a testing platform (2) is provided on the top of the testing platform (2). Support plates (3) are vertically installed on both sides of the bottom of the testing platform (2). The bottom of the support plates (3) is connected to the base (1). A control panel (4) is fixedly connected to one side of the testing platform (2). A controller is installed inside the control panel (4). The hopper (5) is installed inside the testing platform (2). The hopper (5) is equipped with a clamping assembly (12) for positioning and fixing the asphalt mixture. The top of the hopper (5) is equipped with a waste blocking assembly (6) that can block asphalt mixture fragments during the testing process. A U-shaped frame (14) is set above the hopper (5). The U-shaped frame (14) has a support column (15) inside. A pressure sensor (16) is fixedly connected to the bottom end of the support column (15). A pressure block (17) is installed at the bottom of the pressure sensor (16). A lifting component (18) is provided on the outside of the U-shaped frame (14) to adjust the height of the pressure block (17).

2. The barrier device for testing fatigue performance of asphalt mixture according to claim 1, characterized in that: The clamping assembly (12) includes a U-shaped frame (121) disposed at the top of the inner cavity of the hopper (5). There are two U-shaped frames (121) arranged in a mirror image. One side of the U-shaped frame (121) is connected to the hopper (5). A first hydraulic cylinder (122) is fixedly installed on the top of the U-shaped frame (121). The bottom end of the first hydraulic cylinder (122) extends into the interior of the U-shaped frame (121) and is fixedly connected to a pressure plate (123). The first hydraulic cylinder (122) is connected to the controller terminal via a data cable.

3. The barrier device for testing fatigue performance of asphalt mixture according to claim 1, characterized in that: The lifting assembly (18) includes vertical plates (181) on both sides of the U-shaped frame (14). The bottom end of the vertical plate (181) is connected to the detection table (2). Support seats (182) are vertically installed on the side of the two vertical plates (181) that are far apart from each other. A second oil cylinder (183) is fixedly installed on the top of the support seat (182). The top end of the second oil cylinder (183) is connected to the U-shaped frame (14). The second oil cylinder (183) and the pressure sensor (16) are both connected to the controller terminal via data cables.

4. The barrier device for testing fatigue performance of asphalt mixture according to claim 3, characterized in that: Both sides of the U-shaped frame (14) are fixedly connected with sliders (19), and the two vertical plates (181) are provided with grooves (20) corresponding to the sliders (19) on the side that are close to each other. The sliders (19) are located inside the grooves (20).

5. The barrier device for testing fatigue performance of asphalt mixture according to claim 1, characterized in that: The waste blocking component (6) includes fixed seats (61) disposed on both sides of the hopper (5). The fixed seats (61) are located above the detection table (2). The fixed seats (61) have a receiving cavity (62) inside. Two U-shaped plates (63) are symmetrically arranged between the fixed seats (61). A telescopic sleeve (64) is provided between the U-shaped plates (63) and the hopper (5). The telescopic sleeve (64) is connected to the U-shaped plates (63) and the hopper (5) respectively.

6. The barrier device for testing fatigue performance of asphalt mixture according to claim 5, characterized in that: Both ends of the U-shaped plate (63) are fixedly connected to rotating shafts (8). The rotating shafts (8) are rotatably connected to the inner walls of the receiving cavity (62) through bearings. One end of each of the two rotating shafts (8) extends through the outside of the fixed seat (61) and is fixedly connected to a worm gear (9). A drive motor (10) is fixedly installed on one side of the detection table (2). The output end of the drive motor (10) is fixedly connected to a worm (11). The worm (11) meshes with the worm gears (9) on both sides. The drive motor (10) is connected to the controller terminal through a data cable.

7. The barrier device for testing fatigue performance of asphalt mixture according to claim 5, characterized in that: Both of the two U-shaped plates (63) have recessed grooves (7) on the side that are close to each other, which correspond to the support column (15).

8. The barrier device for testing fatigue performance of asphalt mixture according to claim 1, characterized in that: Below the hopper (5) is a waste collection box (21), which is located on top of the base (1).

9. The barrier device for testing fatigue performance of asphalt mixture according to claim 1, characterized in that: The U-shaped frame (14) has a strip plate (28) inside. The strip plate (28) is connected to both sides of the inner wall of the U-shaped frame (14). A support sleeve (22) is fixedly connected to the top of the strip plate (28). An external threaded sleeve (23) is fixedly connected to the outside of the support sleeve (22). Multiple strip grooves (24) are symmetrically opened inside the external threaded sleeve (23). A first conical surface (25) is provided at the top of the external threaded sleeve (23). The axis of the support column (15) and the support sleeve (22) are in the same plane. The top of the support column (15) extends to the outside of the support sleeve (22) and is provided with an internal threaded sleeve (26). A second conical surface (27) corresponding to the first conical surface (25) is provided at the top of the inner cavity of the internal threaded sleeve (26). The internal threaded sleeve (26) and the external threaded sleeve (23) are connected by threads.

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