Durability test equipment for asphalt mixture

Abstract

The utility model relates to the technical field of asphalt mixture testing, and provides asphalt mixture durability testing equipment which comprises a water bath heating pool and a control case distributed on the left side of the outside of the water bath heating pool, a testing mechanism is arranged in the water bath heating pool, and a first vertical mounting frame is arranged in the center of the pool wall of the back side of the water bath heating pool. A lifting driving part for driving the test mechanism to be lifted, separated from the interior of the water bath heating tank, lifted to the upper part and descended to the interior of the water bath heating tank is mounted in the first vertical mounting frame, and the test mechanism comprises a door-shaped mounting frame which is horizontally distributed and a test assembly which slides back and forth in the door-shaped mounting frame. According to the asphalt mixture durability test equipment, through design optimization of lifting driving, fixing frame sliding, hydraulic driving mold separation, precise guiding and the like, automatic and intelligent control of a test mechanism is achieved, and the convenience and safety of test operation are remarkably improved.

Description

Technical Field

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

[0002] Asphalt mixtures are widely used base and surface layer materials in road engineering, and their performance directly affects the service life of roads and traffic safety. With increasingly complex traffic loads and environmental conditions, the durability of asphalt mixtures has become a crucial indicator for evaluating their long-term performance. Durability tests can simulate the various mechanical and environmental forces that asphalt mixtures experience during actual service, helping engineers accurately assess material performance, guide material mix optimization and construction process improvements, thereby enhancing the overall quality and durability of road structures.

[0003] However, existing asphalt mixture durability testing equipment still has many shortcomings in practical applications. Traditional equipment mostly uses manual loading and unloading of samples and molds, which is cumbersome and labor-intensive. Especially in the high-temperature water bath environment, the loading and unloading of samples is difficult, requiring operators to perform the mold loading operation externally, and then install the tensile test mold inside the testing device, especially placing it inside the test water tank inside the testing device, which is not a simple operation.

[0004] Therefore, this solution proposes a durability testing device for asphalt mixtures to solve the above problems. Utility Model Content

[0005] To overcome the shortcomings of the existing technology, the purpose of this utility model is to provide a durability testing device for asphalt mixtures.

[0006] To achieve the aforementioned objective, the technical solution of this utility model is implemented as follows: A durability testing device for asphalt mixtures includes a water bath heating tank and a control box distributed on its external left side. A testing mechanism is installed inside the water bath heating tank. A first vertical mounting frame is provided at the center of the back wall of the water bath heating tank. A lifting drive component is installed inside the first vertical mounting frame to drive the testing mechanism to be lifted out of the water bath heating tank and lifted to the top, and to be lowered into the water bath heating tank. The testing mechanism includes a horizontally distributed portal-shaped mounting frame and a testing component that slides back and forth inside the portal-shaped mounting frame.

[0007] Preferably, the test assembly includes a fixed frame, asphalt mixture placement molds, a crossbeam, tensile stress sensors, and hydraulic cylinders. The fixed frame is slidably engaged inside the U-shaped mounting bracket and can slide out from the inside. The crossbeam is slidably engaged inside the fixed frame. Three asphalt mixture placement molds are provided on the inner side frame of the fixed frame and the opposite surface of the crossbeam. Tensile stress sensors are provided between the three front asphalt mixture placement molds and the connection point of the crossbeam. The three inner asphalt mixture placement molds are fixedly connected to the inner side frame of the fixed frame. Two hydraulic cylinders are respectively installed at the left and right side frames inside the fixed frame. The piston rod ends of the two hydraulic cylinders are connected to the left and right ends of the crossbeam.

[0008] Preferably, longitudinally distributed guide rods are provided on both the left and right sides inside the fixed frame, and the guide rods on both sides are slidably engaged with the two ends of the crossbeam.

[0009] Preferably, the asphalt mixture is placed inside the mold and a forming groove is provided. When the forming grooves of the asphalt mixture placed in front and behind are closed, they form a forming groove with a dumbbell-shaped cross section.

[0010] Preferably, the lifting drive component includes a geared motor installed at the bottom of the first vertical mounting frame, and a drive screw connected to the output end of the geared motor. A screw sleeve is threaded onto the drive screw, and the outer wall of the screw sleeve is fixedly connected to the front and rear centers of the U-shaped mounting frame.

[0011] Preferably, a second vertical mounting frame is provided at the center of the left and right side walls of the water bath heating pool, and a guide component that cooperates with the lifting and sliding of the test mechanism is installed inside the second vertical mounting frame on both sides.

[0012] Preferably, the guide assembly includes a guide post installed inside the second vertical mounting frame, and a guide sleeve slidably sleeved on the guide post, with the inner wall of the guide sleeve fixedly connected to the center of the side of the test mechanism.

[0013] The beneficial effects of this utility model are reflected in:

[0014] This asphalt mixture durability testing equipment achieves efficient and convenient operation through its rational structural design. Firstly, it is equipped with a lifting drive and a screw sleeve driven by a geared motor, enabling the entire testing mechanism to be precisely and smoothly raised and lowered into or out of the water bath heating tank. This facilitates the loading and unloading of asphalt mixture samples by testing personnel, greatly reducing the intensity of manual operation and improving operational safety.

[0015] Secondly, the fixed frame in the test assembly features a sliding snap-fit ​​structure that allows it to slide inwards, enabling testers to easily guide the asphalt mixture into the mold. This avoids the risks associated with direct operation in a high-temperature water bath environment, improving both convenience and safety. Simultaneously, a hydraulic cylinder drives the crossbeam to automatically separate the mold, facilitating tensile durability testing of the molded specimens. This simplifies the traditional manual disassembly process and ensures the repeatability and accuracy of the test.

[0016] The integrated control of the control box enables unified management and automated operation of the geared motor, hydraulic cylinder and sensors. Test personnel can start the equipment, lift, mold separation and data acquisition through the control interface, which greatly improves the efficiency of operation and the convenience of data processing.

[0017] In summary, this asphalt mixture durability testing equipment, through multiple design optimizations such as lifting drive, sliding fixed frame, hydraulically driven mold separation, and precise guidance, achieves automated and intelligent control of the testing mechanism, significantly improving the convenience and safety of testing operations. Operators no longer need to frequently expose themselves to high-temperature water bath environments, reducing labor intensity while ensuring the accuracy and reliability of test data. The equipment has a compact and reasonable structure, is easy to maintain, and is suitable for durability evaluation of various asphalt mixtures, possessing broad application prospects and promotional value. It can effectively promote the advancement of asphalt material performance research and road engineering quality control. Attached Figure Description

[0018] In the attached diagram:

[0019] Figure 1 This is a schematic diagram of the structure of this utility model under test conditions;

[0020] Figure 2 This is a schematic diagram of the structure of the test mechanism of this utility model when it is lifted out of the water bath heating tank.

[0021] Figure 3 This is a schematic diagram of the structure of the test component of this utility model under the conditions of loading and unloading operations;

[0022] Figure 4 This is a schematic diagram of the structure of the testing mechanism of this utility model;

[0023] Figure 5 This is a schematic diagram of the structure of the test component of this utility model;

[0024] Figure 6 This is a schematic diagram of the asphalt mixture placement mold of this utility model;

[0025] Figure 7 This is a structural schematic diagram of the lifting drive component of this utility model;

[0026] Figure 8 This is a schematic diagram of the structure of the guide component of this utility model;

[0027] Explanation of reference numerals in the attached figures:

[0028] 1. Water bath heating tank; 2. Testing mechanism; 3. First vertical mounting frame; 4. Lifting drive component; 5. Second vertical mounting frame; 6. Guide assembly; 7. Control box;

[0029] 21. Portal-shaped mounting bracket; 22. Test assembly;

[0030] 221. Fixing frame; 222. Asphalt mixture placement mold; 223. Crossbeam; 224. Tensile stress sensor; 225. Hydraulic cylinder; 226. Guide rod;

[0031] 2221. Forming groove;

[0032] 41. Gear motor; 42. Drive screw; 43. Screw sleeve;

[0033] 61. Guide post; 62. Guide sleeve. Detailed Implementation

[0034] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. Obviously, the described embodiments are only a part of the embodiments of the utility model, and not all of them. Unless otherwise specified, the embodiments and features described in this application can be combined with each other. All other embodiments obtained by those skilled in the art based on the embodiments of the utility model without creative effort are within the scope of protection of the utility model.

[0035] It should be noted that if the utility model embodiment involves directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0036] Furthermore, "multiple" refers to two or more. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of a person skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by the utility model.

[0037] Please refer to the instruction manual appendix. Figures 1-8This utility model provides a durability testing device for asphalt mixtures, which mainly includes a water bath heating tank 1, a testing mechanism 2, a lifting drive component 4, a first vertical mounting frame 3, a second vertical mounting frame 5, a guide component 6, and a control box 7.

[0038] The water bath heating tank 1 is a container for holding and heating asphalt mixture samples, and its interior is equipped with a testing mechanism 2. The testing mechanism 2 includes a portal-shaped mounting frame 21 and a testing component 22 that slides inside it. The portal-shaped mounting frame 21 is horizontally arranged and fixed to a lead screw sleeve 43. The lead screw sleeve 43 is connected to a reduction motor 41 via a drive lead screw 42, enabling the lifting and lowering movement of the entire testing mechanism 2. That is, during the test operation, the testing mechanism 2 can be lowered into the water bath heating tank 1, and when it is necessary to remove the asphalt mixture inside or to place the asphalt mixture in the initial operation, the testing mechanism 2 can be lifted out of the water bath heating tank 1. The reduction motor 41 is installed at the bottom of the first vertical mounting frame 3, which is fixed at the center of the back wall of the water bath heating tank 1.

[0039] The test assembly 22 includes a fixed frame 221, an asphalt mixture placement mold 222, a crossbeam 223, a tensile stress sensor 224, and a hydraulic cylinder 225. The fixed frame 221 is slidably engaged inside the U-shaped mounting bracket 21 and can slide inwards, allowing it to be pulled out when the entire test mechanism 2 is lifted from the top of the water bath heating tank 1, facilitating the introduction of the asphalt mixture into the asphalt mixture placement mold 222 by the test personnel. The fixed frame 221 has longitudinally distributed guide rods 226 on its left and right sides, which slide smoothly and guide the crossbeam 223 at both ends, ensuring stable sliding. The crossbeam 223 is slidably engaged inside the fixed frame 221, and three asphalt mixture placement molds 222 are provided on the inner frame of the fixed frame 221 opposite to the crossbeam 223. The asphalt mixture placement mold 222 has a forming groove 2221 inside. When the forming grooves 2221 of the front and rear opposing asphalt mixture placement molds 222 are closed, they form a dumbbell-shaped forming groove suitable for forming asphalt mixture samples. Tensile stress sensors 224 are installed between the connection points of the three front asphalt mixture placement molds 222 and the crossbeam 223 to measure the stress change of the sample during the tensile process. Two hydraulic cylinders 225 are provided, respectively installed on the left and right sides of the fixed frame 221. The piston rod ends are connected to the left and right ends of the crossbeam 223 to drive the crossbeam 223 to move forward, thereby moving the three front asphalt mixture placement molds 222 forward, causing the front and rear opposing asphalt mixture placement molds 222 to detach, thus enabling a tensile durability test on the asphalt mixture that has been formed inside.

[0040] A second vertical mounting frame 5 is respectively installed at the center of the left and right side walls of the water bath heating tank 1. A guide assembly 6 is installed inside the second vertical mounting frame 5. The guide assembly 6 includes a guide post 61 and a guide sleeve 62 slidably sleeved on the guide post 61. The inner wall of the guide sleeve 62 is fixedly connected to the center of the side of the test mechanism 2. The guide post 61 and the guide sleeve 62 work together to ensure that the test mechanism 2 maintains stable and accurate guidance during the lifting and lowering process.

[0041] The control box 7 is located on the outside left side of the water bath heating pool 1. It is used to control the operation of the geared motor 41, hydraulic cylinder 225 and related sensors to realize the automation of the test process and data acquisition.

[0042] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A durability testing device for asphalt mixtures, comprising a water bath heating tank (1) and a control box (7) distributed on its external left side, characterized in that, The water bath heating pool (1) is equipped with a test mechanism (2). A first vertical mounting frame (3) is provided at the center of the back wall of the water bath heating pool (1). The first vertical mounting frame (3) is equipped with a lifting drive (4) that drives the test mechanism (2) to be lifted out of the water bath heating pool (1) and raised to the top and lowered into the water bath heating pool (1). The test mechanism (2) includes a horizontally distributed portal frame (21) and a test component (22) that slides back and forth inside the portal frame (21).

2. The durability testing equipment for asphalt mixtures according to claim 1, characterized in that, The test assembly (22) includes a fixed frame (221), an asphalt mixture placement mold (222), a crossbeam (223), a tensile stress sensor (224), and a hydraulic cylinder (225). The fixed frame (221) is slidably engaged inside the U-shaped mounting bracket (21) and can slide out from the inside. The crossbeam (223) is slidably engaged inside the fixed frame (221). Three asphalt mixture placement molds are provided on the inner side frame of the fixed frame (221) and the opposite surface of the crossbeam (223). Tensile stress sensors (224) are provided between the three asphalt mixture placement molds (222) at the front and the connection point of the crossbeam (223). The three asphalt mixture placement molds (222) on the inner side are fixedly connected to the inner side frame of the fixed frame (221). There are two hydraulic cylinders (225) installed on the left and right sides of the fixed frame (221) respectively. The piston rod ends of the hydraulic cylinders (225) on both sides are connected to the left and right ends of the crossbeam (223).

3. The durability testing equipment for asphalt mixtures according to claim 2, characterized in that, The fixed frame (221) is provided with longitudinally distributed guide rods (226) on both the left and right sides, and the guide rods (226) on both sides are slidably connected to the two ends of the crossbeam (223).

4. The durability testing equipment for asphalt mixtures according to claim 2, characterized in that, The asphalt mixture placement mold (222) has a forming groove (2221) inside. When the forming grooves (2221) inside the asphalt mixture placement mold (222) are closed, they form a forming groove with a dumbbell-shaped cross section.

5. The durability testing equipment for asphalt mixtures according to claim 1, characterized in that, The lifting drive component (4) includes a reduction motor (41) installed at the bottom of the first vertical mounting bracket (3) and a drive screw (42) connected to the output end of the reduction motor (41). A screw sleeve (43) is threaded onto the drive screw (42), and the outer wall of the screw sleeve (43) is fixedly connected to the front and rear center of the portal frame (21).

6. The durability testing equipment for asphalt mixtures according to claim 1, characterized in that, The water bath heating pool (1) has a second vertical mounting frame (5) at the center of the left and right side walls. The second vertical mounting frame (5) on both sides has a guide component (6) installed inside to cooperate with the test mechanism (2) to lift and slide.

7. The durability testing equipment for asphalt mixtures according to claim 6, characterized in that, The guide assembly (6) includes a guide post (61) installed inside the second vertical mounting bracket (5) and a guide sleeve (62) slidably sleeved on the guide post (61), with the inner wall of the guide sleeve (62) fixedly connected to the center of the side of the test mechanism (2).

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