An asphalt concrete strength detection test device

Abstract

The present invention belongs to the field of asphalt concrete strength detection, and in particular, it is an asphalt concrete strength detection test device. Aiming at the problems of the existing asphalt concrete strength detection test device that can only detect one side of the asphalt concrete at a time, with low detection efficiency, affecting the detection accuracy, and not being convenient for detecting and testing asphalt concrete at different temperatures, thus affecting the reliability of the detection data, the following solution is now proposed. It includes two horizontally arranged channel steels, and two vertically arranged support legs are fixedly installed on the tops of the two channel steels. The same fixed platform is fixedly installed on the four support legs. The present invention can conduct strength detection tests on asphalt concrete samples from different orientations, making the test results more accurate, and can also obtain the strength of asphalt concrete samples at different temperatures, improving the reliability of the detection test, facilitating automatic material replacement, and enhancing the efficiency of the asphalt concrete sample strength detection test.

Description

Technical Field

[0001] The present invention relates to the technical field of asphalt concrete detection, and particularly to a device for testing the strength of asphalt concrete. Background Art

[0002] Asphalt concrete, commonly known as asphalt concrete, is a mixture made of artificially selected mineral materials with a certain gradation composition and a certain proportion of road asphalt materials, which is mixed under strictly controlled conditions. Asphalt concrete can be divided into two major categories: those using petroleum asphalt and those using coal asphalt. Asphalt concrete needs to be subjected to a strength detection test before use.

[0003] The authorized document with the publication number CN109142540B discloses a device for detecting the strength of concrete, including a main body of the detection device, a protective cover for an ultrasonic receiver, a protective cover for an ultrasonic generator, and an intelligent processing system. Rubber handholds are fixedly installed at both ends of the main body of the detection device. Grooves are opened at both ends of the rubber handholds, and fixing rods are fixedly installed in the grooves. Annular soft pads are fixedly installed at the bottoms of the protective cover for the ultrasonic receiver and the protective cover for the ultrasonic generator. Circular grooves are opened at the central positions of the bottoms of the protective cover for the ultrasonic receiver and the protective cover for the ultrasonic generator. LED detection lights are fixedly installed on the inner side walls of the circular grooves far away from the open ends. Mounting holes are opened at the central positions of the inner side walls of the circular grooves far away from the open ends. It can only detect one side of the asphalt concrete at a time, which not only has low detection efficiency but also affects the detection accuracy. It is not convenient to conduct detection tests on asphalt concrete at different temperatures, affecting the reliability of the detection data. Therefore, a device for testing the strength of asphalt concrete is needed to solve the above-mentioned problems. Summary of the Invention

[0004] The purpose of the present invention is to solve the disadvantages in the prior art that a device for testing the strength of asphalt concrete can only detect one side of the asphalt concrete at a time, which not only has low detection efficiency but also affects the detection accuracy, and it is not convenient to conduct detection tests on asphalt concrete at different temperatures, affecting the reliability of the detection data, and to propose a device for testing the strength of asphalt concrete.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A device for testing the strength of asphalt concrete includes two channel steels arranged horizontally. Two vertical support legs are fixedly installed at the tops of the two channel steels, and the same fixed platform is fixedly installed on the four support legs;

[0007] A test bench is fixedly mounted on the top of the fixed platform and is vertically arranged with a concrete ultrasonic detector on the outside of the fixed platform. A material placement platform that can slide horizontally along the test bench is provided on the top of the test bench. The material placement platform is provided with a placement component for placing asphalt concrete samples and a water bath component for controlling the temperature of the asphalt concrete samples, as well as a material changing component fixed on the test bench for driving the material placement platform to slide horizontally.

[0008] It includes a control box fixedly mounted on the top of four supporting legs, two vertically arranged concave plates fixedly mounted on the control box, and both concave plates are provided with a side strength detection component for detecting the side strength of the asphalt concrete sample; it also includes a top strength detection component fixedly mounted on the control box for detecting the top strength of the asphalt concrete sample, and the top strength detection component is connected to the side strength detection component through a linkage component.

[0009] Preferably, the placement assembly is provided with a plurality of convex placement platforms fixedly mounted on the top of the material placement platform and arranged horizontally, and a plurality of positioning plates for positioning the asphalt concrete samples are fixedly mounted on the top of the convex placement platforms.

[0010] Preferably, the water bath assembly is provided with a plurality of water baths fixedly mounted on the top of the loading platform and the plurality of convex placement platforms arranged in an alternating manner, the water bath is provided with a top cover, a hollow control block is fixedly mounted on the water bath, a temperature controller, a thermocouple and an electric heater are fixedly mounted inside the control block, the end of the thermocouple extends into the interior of the water bath, and the thermocouple and the electric heater are both electrically connected to the temperature controller.

[0011] Preferably, the material changing assembly is provided with a material changing motor fixedly mounted on the detection test bench, the end of the output shaft of the material changing motor is fixedly mounted with a horizontally arranged drive shaft, and the outer fixed sleeve of the drive shaft is provided with a material changing gear, and the bottom of the material loading table is fixedly mounted with a connecting rack meshing with the material changing gear.

[0012] Preferably, the side strength detection assembly is rotatably mounted on a horizontally arranged optical axis on the concave plate, a screw is fixedly mounted on the end of the optical axis, and a threaded block is threadedly connected to the outer side of the screw, and a No. 2 ultrasonic detection plate connected to the concrete ultrasonic detector for transmission is fixedly mounted on one side of the threaded block through two connecting columns, and a plurality of No. 2 transducers, all of which are connected to the concrete ultrasonic detector for transmission, are fixedly mounted on the No. 2 ultrasonic detection plate.

[0013] Preferably, a horizontally arranged limiting plate is fixedly mounted on each of the two concave plates, and the two limiting plates are slidably connected to their corresponding threaded blocks respectively.

[0014] Preferably, a vertically arranged electric telescopic rod fixedly installed at the bottom of the control box is provided on the top strength detection component. A horizontally arranged first ultrasonic detection plate connected to the concrete ultrasonic detector in a transmission manner is fixedly installed at the bottom of the electric telescopic rod. A plurality of first transducers all connected to the concrete ultrasonic detector in a transmission manner are fixedly installed on the first ultrasonic detection plate.

[0015] Preferably, two linkage rods fixedly installed on the outer side of the electric telescopic rod are provided on the linkage component. Driving racks capable of longitudinally sliding along the concave plate are fixedly installed on the two linkage rods. Synchronous gears respectively meshing with the two driving racks are fixedly sleeved on the outer sides of the two optical axes.

[0016] In the present invention, for the asphalt concrete strength detection test device, when the electric telescopic rod is started, the plurality of first transducers of the first ultrasonic detection plate and the second ultrasonic detection plates and the second transducers can just be attached to three asphalt concrete samples on the same convex placing table. The plurality of second transducers are attached to the sides of the two outer asphalt concrete samples, and the first transducers are attached to the tops of the middle asphalt concrete samples. In a single detection test, the detection strengths of the asphalt concrete samples when detected from different orientations can be obtained, making the detection test results more accurate.

[0017] The plurality of water bath boxes heat the asphalt concrete samples in an immersion manner, enabling the asphalt concrete samples to conduct strength detection tests at different temperatures, thereby making the detection test results more reliable. After the strength detection tests of the three asphalt concrete samples on the same convex placing table are completed, start the material changing motor. The output shaft of the material changing motor drives the placing table to move horizontally through the transmission of the material changing gear and the connecting rack. Each time the material changing motor is started, the placing table can move a distance equal to the distance between two convex placing tables, completing the automatic material changing of the asphalt concrete samples. During the automatic material changing process, the detected asphalt concrete samples are replaced. In this way, the efficiency of the asphalt concrete sample strength detection test can be improved. In the present invention, a strength detection can be performed on an asphalt concrete sample from different orientations in a single detection test, making the detection test results more accurate. The strength of the asphalt concrete sample at different temperatures can also be obtained, improving the reliability of the detection test, facilitating automatic material changing, and improving the efficiency of the asphalt concrete sample strength detection test. Description of the Drawings

[0018] Figure 1 It is a schematic structural diagram of an asphalt concrete strength detection test device proposed by the present invention;

[0019] Figure 2 It is a schematic separation structure diagram of a detection test bench and a placing table of an asphalt concrete strength detection test device proposed by the present invention;

[0020] Figure 3 Schematic diagram of the concave plate structure of a device for testing the strength of asphalt concrete proposed by the present invention;

[0021] Figure 4 Schematic diagram of the water bath tank structure of a device for testing the strength of asphalt concrete proposed by the present invention;

[0022] Figure 5 For a device for testing the strength of asphalt concrete proposed by the present invention Figure 3 Enlarged schematic diagram of part A structure.

[0023] In the figure: 1, channel steel; 2, fixed platform; 3, test bench; 4, material-changing motor; 5, material-changing gear; 6, material placing table; 7, connecting rack; 8, convex placing table; 9, asphalt concrete sample; 10, water bath tank; 11, control block; 12, temperature controller; 13, thermocouple; 14, electric heater; 15, electric telescopic rod; 16, first ultrasonic detection board; 17, linkage rod; 18, driving rack; 19, optical axis; 20, synchronous gear; 21, threaded block; 22, connecting column; 23, second ultrasonic detection board; 24, limiting plate; 25, control box; 26, concrete ultrasonic detector; 27, concave plate. Specific embodiments

[0024] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0025] Example 1 Refer to Figures 1-5 , a device for testing the strength of asphalt concrete, including two horizontally arranged channel steels 1, and two vertically arranged support legs are fixedly installed on the tops of the two channel steels 1, and the same fixed platform 2 is fixedly installed on the four support legs; a test bench 3 perpendicularly arranged to the fixed platform 2 and provided with a concrete ultrasonic detector 26 on the outside is fixedly installed on the top of the fixed platform 2, and a material placing table 6 that can slide horizontally along the test bench 3 is arranged on the top of the test bench 3. A placing assembly for placing the asphalt concrete sample 9, a water bath assembly for controlling the temperature of the asphalt concrete sample 9, and a material-changing assembly fixedly arranged on the test bench 3 for driving the material placing table 6 to slide horizontally are arranged on the material placing table 6;

[0026] It includes a control box 25 fixedly mounted on the top of the four supporting legs, and two vertically arranged concave plates 27 are fixedly mounted on the control box 25. Both concave plates 27 are provided with a side strength detection component for detecting the side strength of the asphalt concrete sample 9; it also includes a top strength detection component fixedly mounted on the control box 25 for detecting the top strength of the asphalt concrete sample 9, and the top strength detection component is connected to the side strength detection component through a linkage component.

[0027] Example 2 is an improvement on Example 1: an asphalt concrete strength testing device, comprising two horizontally arranged channel steels 1, two vertically arranged support legs fixedly mounted on the top of each of the two channel steels 1, and a same fixed platform 2 fixedly mounted on the four support legs, and the fixed platform 2 is horizontally arranged;

[0028] A test bench 3 is fixedly installed on the top of the fixed platform 2 and is provided with a concrete ultrasonic detector 26 on the outside thereof, which is arranged vertically with the fixed platform 2. The test bench 3 and the fixed platform 2 are arranged in a cross shape. A loading platform 6 which can slide horizontally along the test bench 3 is provided on the top of the test bench 3. The loading platform 6 is provided with a placement component for placing asphalt concrete samples 9 and a water bath component for controlling the temperature of the asphalt concrete samples 9. The placement component is provided with a plurality of convex placement platforms 8 which are fixedly installed on the top of the loading platform 6 and are arranged horizontally. Three asphalt concrete samples 9 of the same specifications are placed horizontally on the same convex placement platform 8. A plurality of positioning plates for positioning the asphalt concrete samples 9 are fixedly installed on the top of the convex placement platform 8. The water bath component is provided with a plurality of water bath boxes 10 which are fixedly installed on the top of the loading platform 6 and are staggered with the plurality of convex placement platforms 8. There is a top cover, a control block 11 with a hollow setting is fixedly installed on the water bath 10, and a temperature controller 12, a thermocouple 13 and an electric heater 14 are fixedly installed inside the control block 11. The temperature controller 12, the thermocouple 13 and the electric heater 14 are existing mature technologies. The end of the thermocouple 13 extends into the interior of the water bath 10, and the thermocouple 13 and the electric heater 14 are electrically connected to the temperature controller 12, as well as a material change component fixedly arranged on the detection test bench 3 for driving the material loading platform 6 to slide horizontally. The material change component is provided with a material change motor 4 fixedly mounted on the detection test bench 3, and a horizontally arranged drive shaft is fixedly mounted on the end of the output shaft of the material change motor 4, and a material change gear 5 is fixedly provided on the outer fixed sleeve of the drive shaft. The bottom of the material loading platform 6 is fixedly installed with a connecting rack 7 meshing with the material change gear 5, and the material change gear 5 and the connecting rack 7 will not be out of mesh;

[0029] It includes a control box 25 fixedly mounted on the top of the four supporting legs, two vertically arranged concave plates 27 fixedly mounted on the control box 25, and side strength detection components for detecting the side strength of the asphalt concrete sample 9 are provided on the two concave plates 27, and a horizontally arranged optical axis 19 rotatably mounted on the concave plate 27 on the side strength detection component, a screw is fixedly mounted on the end of the optical axis 19, and a threaded block 21 is connected to the outer thread of the screw, and a No. 2 ultrasonic detection plate 23 connected to the concrete ultrasonic detector 26 for transmission is fixedly mounted on one side of the threaded block 21 through two connecting columns 22, and a plurality of No. 2 transducers connected to the concrete ultrasonic detector 26 for transmission are fixedly mounted on the No. 2 ultrasonic detection plate 23, and a horizontally arranged limit plate 24 is fixedly mounted on the two concave plates 27, and the two limit plates 24 are respectively slidably connected to the corresponding threaded blocks 21, and the threaded blocks 21 will not rotate with the screw; it also includes a fixed A top strength detection assembly for detecting the top strength of the asphalt concrete sample 9 is provided on the control box 25. The top strength detection assembly is provided with a vertically arranged electric telescopic rod 15 fixedly mounted on the bottom of the control box 25. A horizontally arranged No. 1 ultrasonic detection plate 16 is fixedly mounted on the bottom of the electric telescopic rod 15 and is connected to the concrete ultrasonic detector 26 for transmission. A plurality of No. 1 transducers, all of which are connected to the concrete ultrasonic detector 26 for transmission, are fixedly mounted on the No. 1 ultrasonic detection plate 16. The top strength detection assembly is connected to the side strength detection assembly through a linkage assembly. The linkage assembly is provided with two linkage rods 17 fixedly mounted on the outside of the electric telescopic rod 15. The two linkage rods 17 are fixedly mounted on a drive rack 18 that can slide longitudinally along the concave plate 27. The outer sides of the two optical axes 19 are fixedly sleeved with synchronous gears 20 that are respectively engaged with the two drive racks 18. The synchronous gear 20 and the drive rack 18 will not be out of engagement.

[0030] In the present invention, before use, the asphalt concrete sample 9 is placed in different water bath boxes 10 for soaking, and the soaking time is at least 2 h. The temperatures of the multiple water bath boxes 10 increase in a gradient manner. Three asphalt concrete samples 9 in one water bath box 10 are taken out, wiped clean, and then placed on the corresponding convex placing table 8. Then, the switch of the electric telescopic rod 15 is pressed to start the electric telescopic rod 15. The output shaft of the electric telescopic rod 15 will drive the two linkage rods 17 and the first ultrasonic detection plate 16 to move downward. The two linkage rods 17 will act on the two driving racks 18 to move downward. Through the meshing relationship between the set driving rack 18 and the synchronous gear 20, the downward movement of the driving rack 18 can be converted into the rotation of the synchronous gear 20 and the optical axis 19. Since the screw on the optical axis 19 is threadedly connected to the threaded block 21, the rotation of the optical axis 19 can be converted into the horizontal movement of the threaded block 21 and the second ultrasonic detection plate 23. When the first transducer on the first ultrasonic detection plate 16 detects the top of the middle asphalt concrete sample 9, the second transducers on the two second ultrasonic detection plates 23 can just be in close contact with the mutually remote sides of the two outer asphalt concrete samples 9. The detection data is sent to the asphalt concrete sample 9 through the first transducer and the second transducer for detection. After the detection is completed, the switch of the electric telescopic rod 15 is pressed again to reset the electric telescopic rod 15, and the material-changing motor 4 is started. The output shaft of the material-changing motor 4 drives the placing table 6 to move horizontally after being transmitted by the material-changing gear 5 and the connecting rack 7. Each time the material-changing motor 4 is started, the placing table 6 can move a distance equal to the distance between two convex placing tables 8, completing the automatic material change of the asphalt concrete sample 9. During the automatic material change process, the detected asphalt concrete sample 9 is replaced.

[0031] As described above, it is only the preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and all should be covered by the protection scope of the present invention.

Claims

1. An asphalt concrete strength testing device, comprising two horizontally arranged channel steels (1), the tops of the two channel steels (1) are fixedly mounted with two vertically arranged support legs, and the four support legs are fixedly mounted with a same fixed platform (2), characterized in that: A test bench (3) is fixedly mounted on the top of the fixed platform (2) and is provided with a concrete ultrasonic detector (26) on the outside thereof and is arranged vertically with respect to the fixed platform (2). A material placement platform (6) is provided on the top of the test bench (3) and can slide horizontally along the test bench (3). The material placement platform (6) is provided with a placement component for placing an asphalt concrete sample (9) and a water bath component for controlling the temperature of the asphalt concrete sample (9), as well as a material changing component fixed on the test bench (3) for driving the material placement platform (6) to slide horizontally. It comprises a control box (25) fixedly mounted on the top of four supporting legs, two concave plates (27) arranged vertically are fixedly mounted on the control box (25), and both concave plates (27) are provided with a side strength detection component for detecting the side strength of the asphalt concrete sample (9); It also includes a top strength detection component fixedly mounted on the control box (25) for detecting the top strength of the asphalt concrete sample (9), wherein the top strength detection component is transmission-connected to the side strength detection component via a linkage component; The side strength detection assembly includes a horizontally arranged optical axis (19) rotatably mounted on the concave plate (27), a screw being fixedly mounted on the end of the optical axis (19), and a threaded block (21) being threadedly connected to the outer side of the screw, a second ultrasonic detection plate (23) being fixedly mounted on one side of the threaded block (21) via two connecting columns (22) and being connected to the concrete ultrasonic detector (26), and a plurality of second transducers being fixedly mounted on the second ultrasonic detection plate (23) and being connected to the concrete ultrasonic detector (26); A horizontally arranged limiting plate (24) is fixedly mounted on each of the two concave plates (27), and the two limiting plates (24) are slidably connected to their corresponding threaded blocks (21).

2. The asphalt concrete strength detection test device according to claim 1, characterized in that, The placement assembly comprises a plurality of convex placement platforms (8) fixedly mounted on the top of the material placement platform (6) and arranged horizontally, and a plurality of positioning plates for positioning the asphalt concrete sample (9) are fixedly mounted on the top of the convex placement platform (8).

3. An asphalt concrete strength detection test device according to claim 2, characterized in that, The water bath assembly includes a plurality of water baths (10) fixedly mounted on the top of the material placement table (6) and staggered on the plurality of convex placement tables (8), the water bath (10) being provided with a top cover, a hollow control block (11) being fixedly mounted on the water bath (10), a temperature controller (12), a thermocouple (13) and an electric heater (14) being fixedly mounted inside the control block (11), the end of the thermocouple (13) extending into the interior of the water bath (10), and the thermocouple (13) and the electric heater (14) being electrically connected to the temperature controller (12).

4. An asphalt concrete strength detection test device according to any one of claims 1-3, characterized in that, The refueling assembly includes a refueling motor (4) fixedly installed on the detection test bench (3). The end of the output shaft of the refueling motor (4) is fixedly installed with a horizontally arranged driving shaft, and a refueling gear (5) is fixedly sleeved on the outer side of the driving shaft. A connecting rack (7) meshing with the refueling gear (5) is fixedly installed at the bottom of the material placing table (6).

5. The asphalt concrete strength detection test device according to claim 1, wherein, The top strength detection assembly includes a vertically arranged electric telescopic rod (15) fixedly installed at the bottom of the control box (25). The bottom of the electric telescopic rod (15) is fixedly installed with a horizontally arranged first ultrasonic detection plate (16) transmission-connected to the concrete ultrasonic detector (26). A plurality of first transducers all transmission-connected to the concrete ultrasonic detector (26) are fixedly installed on the first ultrasonic detection plate (16).

6. The asphalt concrete strength detection test device according to claim 5, characterized in that, The linkage assembly includes two linkage rods (17) fixedly installed on the outer side of the electric telescopic rod (15). Driving racks (18) capable of longitudinally sliding along the concave plate (27) are fixedly installed on the two linkage rods (17). Synchronous gears (20) respectively meshing with the two driving racks (18) are fixedly sleeved on the outer sides of the two optical axes (19).

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