Concrete crack resistance detection device
By designing a concrete crack resistance testing device with adjustable load application and environmental simulation mechanisms, the problem of single test results of existing equipment has been solved, and high-accuracy testing in real environment has been achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-09
- Publication Date
- 2026-04-07
AI Technical Summary
Existing concrete testing equipment provides only one result when testing crack resistance, which is difficult to reflect the complex factors in actual applications, resulting in a large gap between the test data and the actual situation.
A concrete crack resistance testing device was designed, including an adjustable load application mechanism, a height adjustment mechanism, and an environmental simulation mechanism. It can adjust the position and area of the support point and load application point under simulated real use environment, and provide a set value of thrust through a hydraulic supply component for testing.
It improves the authenticity and accuracy of concrete crack resistance test data, enabling testing in simulated real-world environments and reflecting actual usage parameters.
Smart Images
Figure CN121805019A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of concrete performance research technology, and more specifically, to a device for testing the crack resistance of concrete. Background Technology
[0002] Concrete is one of the most important civil engineering materials in modern times. It is an artificial stone material made by mixing cementitious materials, granular aggregates (also known as aggregates), water, and, when necessary, admixtures and additives in a certain proportion, uniformly mixing, compacting, and curing. Concrete is characterized by abundant and inexpensive raw materials and a simple production process, leading to its increasing use. Concrete also features high compressive strength, good durability, and a wide range of strength grades.
[0003] However, concrete will develop cracks during actual use, and cracks are an important factor affecting the durability of concrete structures. Conventional testing equipment requires impacting or pressurizing the concrete block to test the crack resistance of concrete. However, the factors that cause concrete cracking are very complex, and the test results of conventional testing equipment are relatively simple, with a large gap between the test data and actual applications. Summary of the Invention
[0004] The purpose of this invention is to provide a concrete crack resistance testing device in order to solve the above-mentioned problems.
[0005] This invention provides a device for testing the crack resistance of concrete, comprising: A carrier box, on the inner wall of which a filter plate is fixedly connected; An adjustable load application mechanism is provided inside a bearing box. The adjustable load application mechanism includes an adjustable support assembly, a hydraulic supply assembly connected to the adjustable support assembly, and an adjustable pressure application assembly connected between the output end of the hydraulic supply assembly and the adjustable support assembly. The adjustable support assembly is used to adjust the coordinates of the support point of the concrete sample and the support area of the support point. The hydraulic supply assembly is used to provide a set value of thrust to the adjustable pressure application assembly. The adjustable pressure application assembly is used to adjust the coordinates of the pressure point of the concrete sample and the pressure area of the pressure point. A height adjustment mechanism is connected between the load cell and the adjustable load application mechanism, and the height adjustment mechanism is used to adjust the height of the adjustable load application mechanism inside the load cell.
[0006] As a further optimization of the present invention, the adjustable support assembly includes a fixed bearing plate II, a plurality of fixed guide rods fixedly connected to the fixed bearing plate II, a fixed bearing plate III detachably connected to the fixed bearing plate II, a plurality of connecting screws I detachably connected to the fixed bearing plate III, and a support plate connected to the other end of the connecting screws I. The support plate is used to contact the concrete sample, and the plurality of fixed guide rods are all fixedly connected to the height adjustment mechanism.
[0007] As a further optimization of the present invention, the hydraulic supply component includes a second hydraulic cylinder and a limiting sliding plate fixedly connected to the output end of the second hydraulic cylinder. The limiting sliding plate is provided with a plurality of limiting through holes that cooperate with the fixed guide rod. The adjustable pressure application component is detachably connected to the limiting sliding plate, and the second hydraulic cylinder is fixedly connected to the height adjustment mechanism.
[0008] As a further optimization of the present invention, the adjustable pressure application assembly includes a pressure plate 1 detachably connected to the limiting sliding plate, a plurality of connecting screws 2 detachably connected to the pressure plate 1, and a pressure plate 2 connected to the other end of the connecting screws 2.
[0009] As a further optimization of the present invention, the height adjustment mechanism includes two sets of vertical linear moving components symmetrically connected to the bearing box and a fixed bearing component connected between the two sets of vertical linear moving components. The adjustable support component and the hydraulic supply component are both fixedly connected to the fixed bearing component. The vertical linear moving component is used to drive the fixed bearing component to move in the vertical direction.
[0010] As a further optimization of the present invention, the vertical linear movement component includes a hydraulic cylinder fixedly connected to the bearing box, a fixed bearing frame, a sliding frame body slidably connected to the fixed bearing frame, a fixed bearing plate three fixedly connected to the sliding frame body, and a limiting hoop. The connecting member is fixedly connected to the output end of the hydraulic cylinder, and both ends of the fixed bearing component are respectively connected to the corresponding limiting hoop.
[0011] As a further optimization of the present invention, the fixed bearing assembly includes a fixed bearing plate and two connecting rods symmetrically connected to the fixed bearing plate. The two connecting rods are respectively connected to a corresponding connecting rod. The fixed guide rod and the hydraulic cylinder are both fixedly connected to the fixed bearing plate.
[0012] As a further optimization of the present invention, the carrier box is also connected to an environmental simulation mechanism, which includes a wind and wave simulation component connected to the carrier box and a circulating flow component connected between the carrier box and the wind and wave simulation component. The input end of the circulating flow component is located below the filter plate.
[0013] As a further optimization of the present invention, the wind and wave simulation component includes a gas-liquid mixed transport pump fixedly connected to the carrier box, and a first pipe and a third pipe connected to the gas-liquid mixed transport pump. The first pipe is connected to the output end of the circulating flow component, and the third pipe is connected to the outside.
[0014] As a further optimization of the present invention, the circulating flow component includes a second pipe connected to the carrier box and an electrically controlled valve body connected to the output end of the second pipe. The output end of the electrically controlled valve body is connected to the input end of the first pipe. The input end of the second pipe is located below the filter plate. A control module is also connected to the carrier box. The gas-liquid mixing pump and the electrically controlled valve body are both electrically connected to the control module.
[0015] The beneficial effects of this invention are as follows: This invention can place concrete samples in a simulated real-world environment for testing, and can adjust the position and area of the support points, load application points, and other parameters based on actual usage parameters, thereby effectively improving the authenticity and accuracy of concrete crack resistance test data. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is the invention Figure 1 An enlarged view of point A in the image; Figure 3 This is a view showing the interaction between the height adjustment mechanism and the adjustable load application mechanism of the present invention; Figure 4 This is a partial cross-sectional view of the adjustable support assembly and adjustable pressure assembly of the present invention.
[0017] In the diagram: 1. Carrier box; 2. Control module; 3. Height adjustment mechanism; 301. Hydraulic cylinder one; 302. Fixed carrier frame; 303. Sliding frame; 304. Connecting piece; 305. Limiting clamp; 306. Connecting rod; 307. Fixed carrier plate one; 4. Adjustable load application mechanism; 401. Fixed guide rod; 402. Fixed carrier plate two; 403. Hydraulic cylinder two; 404. Limiting sliding plate; 405. Fixed carrier plate three; 406. Support plate; 4060. Connecting screw one; 407. Pressure plate one; 5. Environmental simulation mechanism; 501. Gas-liquid mixed transport pump; 502. Pipe one; 503. Pipe two; 504. Electrically controlled valve body; 505. Pipe three; 6. Filter plate. Detailed Implementation
[0018] The subject matter described herein will now be discussed with reference to exemplary embodiments. It should be understood that these embodiments are discussed merely to enable those skilled in the art to better understand and implement the subject matter described herein. Furthermore, features described in some examples may be combined in other examples.
[0019] like Figures 1 to 4 As shown, a concrete crack resistance testing device includes: The carrier box 1 has a filter plate 6 fixedly connected to its inner wall; Adjustable load application mechanism 4 is located inside bearing box 1. Adjustable load application mechanism 4 includes adjustable support assembly, hydraulic supply assembly connected to adjustable support assembly, and adjustable pressure application assembly connected between output end of hydraulic supply assembly and adjustable support assembly. Adjustable support assembly is used to adjust the coordinates of support point of concrete sample and support area of support point. Hydraulic supply assembly is used to provide a set value of thrust to adjustable pressure application assembly. Adjustable pressure application assembly is used to adjust the coordinates of pressure point of concrete sample and pressure area of pressure point. The height adjustment mechanism 3 is connected between the bearing box 1 and the adjustable load application mechanism 4. The height adjustment mechanism 3 is used to adjust the height of the adjustable load application mechanism 4 inside the bearing box 1.
[0020] It should be noted that when testing the crack resistance of a scaled-down sample of a concrete structure based on actual design parameters, the concrete sample is placed on an adjustable support assembly. The coordinates and support area of the adjustable support assembly relative to the concrete sample are adjusted according to the actual usage environment of the concrete structure and the parameters of the support components. Then, based on the predicted load parameters borne by the concrete structure during actual use, the adjustable pressure assembly is adjusted. The hydraulic supply assembly then drives the adjustable pressure assembly toward the concrete sample until it contacts the sample. At this point, the height adjustment mechanism 3 drives the adjustable load application mechanism 4, which contains the concrete sample, toward the filter plate 6 until the set area of the concrete sample is inserted into the liquid stored in the bearing box 1. The liquid can be seawater, fresh water, sewage, or other substances with influencing parameters present in the actual usage environment. Then, the hydraulic supply assembly applies the set pressure to the adjustable pressure assembly, causing it to begin providing load to the concrete sample, thus simulating the crack resistance test process in a real environment.
[0021] In an optional embodiment of the invention, such as Figure 1 , Figure 3 and Figure 4As shown, the adjustable support assembly includes a fixed bearing plate 2 402, several fixed guide rods 401 fixedly connected to the fixed bearing plate 2 402, a fixed bearing plate 3 405 detachably connected to the fixed bearing plate 2 402, several connecting screws 1 4060 detachably connected to the fixed bearing plate 3 405, and a support plate 406 connected to the other end of the connecting screws 1 4060. The support plate 406 is used to contact the concrete sample, and the several fixed guide rods 401 are all fixedly connected to the height adjustment mechanism 3.
[0022] The hydraulic supply assembly includes a second hydraulic cylinder 403 and a limiting sliding plate 404 fixedly connected to the output end of the second hydraulic cylinder 403. The limiting sliding plate 404 is provided with several limiting through holes that cooperate with the fixed guide rod 401. The adjustable pressure application assembly is detachably connected to the limiting sliding plate 404. The second hydraulic cylinder 403 is fixedly connected to the height adjustment mechanism 3.
[0023] The adjustable pressure application assembly includes a pressure plate 407 detachably connected to the limiting sliding plate 404, a plurality of connecting screws 2 detachably connected to the pressure plate 407, and a pressure plate 2 connected to the other end of the connecting screws 2.
[0024] It should be noted that, as mentioned above, the positions of the connecting screw 4060 and the support plate 406 connected to the fixed bearing plate 405 can be adjusted according to the concrete sample support parameters. Specifically, screw holes at predetermined positions can be opened on the fixed bearing plate 405, and then the connecting screw 4060 can be connected to the corresponding screw holes. The area of the support plate 406 can also be adjusted according to the actual parameters. The overall detachable design can be applied to the testing process of different concrete samples. Similarly, when adjusting the load position and area, the position and area of the pressure plate 407 connected to the pressure plate 407 can be adjusted, or the pressure plate 407 can be used directly to apply pressure to the concrete sample.
[0025] In an optional embodiment of the invention, such as Figures 1 to 3 As shown, the height adjustment mechanism 3 includes two sets of vertical linear moving components symmetrically connected to the bearing box 1 and a fixed bearing component connected between the two sets of vertical linear moving components. The adjustable support component and the hydraulic supply component are both fixedly connected to the fixed bearing component. The vertical linear moving components are used to drive the fixed bearing component to move in the vertical direction.
[0026] The vertical linear movement assembly includes a hydraulic cylinder 301 fixedly connected to the bearing box 1, a fixed bearing frame 302, a sliding frame 303 slidably connected to the fixed bearing frame 302, a fixed bearing plate 405 fixedly connected to the sliding frame 303, and a limiting hoop 305. The connecting piece 304 is fixedly connected to the output end of the hydraulic cylinder 301, and both ends of the fixed bearing assembly are respectively connected to the corresponding limiting hoop 305.
[0027] The fixed bearing assembly includes a fixed bearing plate 307 and two symmetrical connecting rods 306 connected to the fixed bearing plate 307. The two connecting rods 306 are respectively connected to the corresponding connecting rods 306. The fixed guide rod 401 and the hydraulic cylinder 403 are both fixedly connected to the fixed bearing plate 307.
[0028] It should be noted that, as mentioned above, when adjusting the height parameter of the concrete sample in the bearing box 1 through the height adjustment mechanism 3, the connecting piece 304 is moved up or down by the hydraulic cylinder 301, thereby driving the sliding frame 303 to move in the same direction and at the same distance. The sliding frame 303 drives the limiting hoop 305, the connecting rod 306 and the fixed bearing plate 307 to move up or down synchronously, thereby driving the fixed guide rod 401, the fixed bearing plate 402, the fixed bearing plate 405 and the support plate 406 connected to the fixed bearing plate 307 to move in the same direction and at the same distance. This allows the concrete sample placed on the support plate 406 to move synchronously, so that a local area of the concrete sample can be immersed in a liquid that has an influencing parameter, including but not limited to seawater, fresh water and sewage.
[0029] In an optional embodiment of the invention, such as Figure 1 As shown, an environmental simulation mechanism 5 is also connected to the carrier box 1. The environmental simulation mechanism 5 includes a wind and wave simulation component connected to the carrier box 1 and a circulating flow component connected between the carrier box 1 and the wind and wave simulation component. The input end of the circulating flow component is located below the filter plate 6.
[0030] The wind and wave simulation component includes a gas-liquid mixing pump 501 fixedly connected to the carrier box 1, a first pipe 502 and a third pipe 505 connected to the gas-liquid mixing pump 501, the first pipe 502 being connected to the output end of the circulating flow component, and the third pipe 505 being connected to the outside.
[0031] The circulating flow assembly includes a second pipe 503 connected to the carrier box 1 and an electrically controlled valve body 504 connected to the output end of the second pipe 503. The output end of the electrically controlled valve body 504 is connected to the input end of the first pipe 502. The input end of the second pipe 503 is located below the filter plate 6. A control module 2 is also connected to the carrier box 1. The gas-liquid mixing pump 501 and the electrically controlled valve body 504 are both electrically connected to the control module 2.
[0032] It should be noted that, as mentioned above, in order to improve the realism of the simulated environment, the liquid in the bearing tank 1 can be powered by the gas-liquid mixing pump 501 to circulate. While driving the liquid in the bearing tank 1 to circulate and simulate real waves, outside air is drawn in from the pipe 505 to form airflow. In conjunction with the generation of waves, the influence of airflow and waves on concrete in the real use environment can be effectively simulated, thereby effectively improving the realism and accuracy of the obtained concrete crack resistance parameters.
[0033] The above description of this embodiment is not limited to the specific implementation described above. The specific implementation described above is merely illustrative and not restrictive. Those skilled in the art can make many other forms based on the guidance of this embodiment, all of which are within the protection scope of this embodiment.
Claims
1. A device for testing the crack resistance of concrete, characterized in that, include: The carrier box (1) has a filter plate (6) fixedly connected to its inner wall. An adjustable load application mechanism (4) is provided inside a bearing box (1). The adjustable load application mechanism (4) includes an adjustable support assembly, a hydraulic supply assembly connected to the adjustable support assembly, and an adjustable pressure application assembly connected between the output end of the hydraulic supply assembly and the adjustable support assembly. The adjustable support assembly is used to adjust the coordinates of the support point of the concrete sample and the support area of the support point. The hydraulic supply assembly is used to provide a set value of thrust to the adjustable pressure application assembly. The adjustable pressure application assembly is used to adjust the coordinates of the pressure application point of the concrete sample and the pressure application area of the pressure application point. A height adjustment mechanism (3) is connected between the bearing box (1) and the adjustable load application mechanism (4). The height adjustment mechanism (3) is used to adjust the height of the adjustable load application mechanism (4) inside the bearing box (1).
2. The concrete crack resistance testing device according to claim 1, characterized in that, The adjustable support assembly includes a fixed bearing plate two (402), a plurality of fixed guide rods (401) fixedly connected to the fixed bearing plate two (402), a fixed bearing plate three (405) detachably connected to the fixed bearing plate two (402), a plurality of connecting screws one (4060) detachably connected to the fixed bearing plate three (405), and a support plate (406) connected to the other end of the connecting screws one (4060). The support plate (406) is used to contact the concrete sample, and the plurality of fixed guide rods (401) are all fixedly connected to the height adjustment mechanism (3).
3. The concrete crack resistance testing device according to claim 2, characterized in that, The hydraulic supply assembly includes a second hydraulic cylinder (403) and a limiting sliding plate (404) fixedly connected to the output end of the second hydraulic cylinder (403). The limiting sliding plate (404) is provided with a plurality of limiting through holes that cooperate with the fixed guide rod (401). The adjustable pressure application assembly is detachably connected to the limiting sliding plate (404). The second hydraulic cylinder (403) is fixedly connected to the height adjustment mechanism (3).
4. The concrete crack resistance testing device according to claim 3, characterized in that, The adjustable pressure application assembly includes a pressure plate 1 (407) detachably connected to the limiting sliding plate (404), a plurality of connecting screws 2 detachably connected to the pressure plate 1 (407), and a pressure plate 2 connected to the other end of the connecting screws 2.
5. The concrete crack resistance testing device according to claim 4, characterized in that, The height adjustment mechanism (3) includes two sets of vertical linear moving components symmetrically connected to the bearing box (1) and a fixed bearing component connected between the two sets of vertical linear moving components. The adjustable support component and the hydraulic supply component are both fixedly connected to the fixed bearing component. The vertical linear moving component is used to drive the fixed bearing component to move in the vertical direction.
6. The concrete crack resistance testing device according to claim 5, characterized in that, The vertical linear movement assembly includes a hydraulic cylinder (301) fixedly connected to the bearing box (1) and a fixed bearing frame (302), a sliding frame (303) slidably connected to the fixed bearing frame (302), a fixed bearing plate (405) fixedly connected to the sliding frame (303) and a limiting hoop (305). The connecting piece (304) is fixedly connected to the output end of the hydraulic cylinder (301), and both ends of the fixed bearing assembly are respectively connected to the corresponding limiting hoop (305).
7. The concrete crack resistance testing device according to claim 6, characterized in that, The fixed bearing assembly includes a fixed bearing plate (307) and two symmetrical connecting rods (306) connected to the fixed bearing plate (307). The two connecting rods (306) are respectively connected to the corresponding connecting rod (306). The fixed guide rod (401) and the hydraulic cylinder (403) are both fixedly connected to the fixed bearing plate (307).
8. The concrete crack resistance testing device according to claim 7, characterized in that, The carrier box (1) is also connected to an environmental simulation mechanism (5). The environmental simulation mechanism (5) includes a wind and wave simulation component connected to the carrier box (1) and a circulating flow component connected between the carrier box (1) and the wind and wave simulation component. The input end of the circulating flow component is located below the filter plate (6).
9. A concrete crack resistance testing device according to claim 8, characterized in that, The wind and wave simulation component includes a gas-liquid mixing pump (501) fixedly connected to the carrier box (1), a first pipe (502) and a third pipe (505) connected to the gas-liquid mixing pump (501). The first pipe (502) is connected to the output end of the circulating flow component, and the third pipe (505) is connected to the outside.
10. A concrete crack resistance testing device according to claim 9, characterized in that, The circulating flow assembly includes a second pipe (503) connected to the carrier box (1) and an electrically controlled valve body (504) connected to the output end of the second pipe (503). The output end of the electrically controlled valve body (504) is connected to the input end of the first pipe (502). The input end of the second pipe (503) is located below the filter plate (6). The carrier box (1) is also connected to a control module (2). The gas-liquid mixing pump (501) and the electrically controlled valve body (504) are both electrically connected to the control module (2).