A device for testing a concrete test piece for damage cracks

Abstract

The utility model relates to concrete detection technical field especially relates to a kind of concrete test piece damage crack detection test device.The utility model provides a kind of concrete test piece damage crack detection test device, which can automatically clamp and fix concrete test piece and automatically detect cracks of concrete test piece.A kind of concrete test piece damage crack detection test device, including protection frame, hydraulic rod, pressing plate and pressure sensor, etc., the upper portion of protection frame is connected with hydraulic rod, the extension end of hydraulic rod is connected with pressure sensor, the lower side of pressure sensor is connected with pressing plate, and the pressing plate is slidably connected with the protection frame.The utility model places platform to move back, drives rotary disc and gear ring to move back, so that gear ring and rack meshing movement, drive rotary disc to rotate, so that clamping frame is close to each other to clamp concrete test piece, so as to automatically fix concrete test piece.

Description

Technical Field

[0001] This utility model relates to the field of concrete testing technology, and in particular to a test device for detecting damage and cracks in concrete specimens. Background Technology

[0002] Concrete, as the most widely used structural material in construction engineering, directly affects the safety and service life of engineering structures through its mechanical properties and durability. During the construction, use, and maintenance of concrete structures, the generation and propagation of cracks are one of the main causes of structural performance degradation. Therefore, accurate detection of damage cracks in concrete specimens is a crucial step in evaluating concrete performance.

[0003] For example, a concrete specimen compressive strength testing device with publication number CN206020172U includes a base, two supports, a crossbeam, a hydraulic cylinder, an upper pressure seat, and a lower pressure seat. The lower pressure seat has symmetrically arranged grooves on both sides of its upper end, and positioning elements are slidably installed within each groove. The lower pressure seat also has a scale strip for observing the positions of the positioning elements on both sides. This invention has the following advantages and effects: This solution utilizes a novel mechanical structure. When testing the compressive strength of a concrete specimen, the width of the concrete specimen is first measured. Then, the positioning elements slide on the grooves, and simultaneously, referring to the scale strip on the lower pressure seat, the positioning elements at both ends can be moved to a position half the width of the concrete specimen from the center of the lower pressure plate. When placing the concrete specimen, both ends are positioned by the positioning elements, ensuring that the concrete specimen is placed precisely in the center of the lower pressure seat, making the operation very convenient during testing. However, due to the concrete specimen compressive strength testing device, the fixing of the concrete specimens relies on manual operation, and when it is necessary to detect cracks in the concrete specimens, the only way is to manually hold the probe to contact the concrete specimens, which is cumbersome, time-consuming and labor-intensive, thus reducing the efficiency of concrete specimen testing.

[0004] Therefore, a concrete specimen damage and crack detection test device has now been developed that can automatically clamp and fix concrete specimens and automatically detect cracks in them. Utility Model Content

[0005] To overcome the shortcomings of existing concrete specimen compressive strength testing devices, which rely on manual operation for fixing concrete specimens and require manual probe contact when detecting cracks, resulting in cumbersome, time-consuming, and labor-intensive operation and reduced testing efficiency, this invention provides a concrete specimen damage and crack detection device that can automatically clamp and fix concrete specimens and automatically detect cracks in them.

[0006] The technical solution of this utility model is as follows: a test device for detecting damage and cracks in concrete specimens, comprising a protective frame, a hydraulic rod, a pressure plate, a pressure sensor, an electric actuator, a placement platform, a rack, a clamping assembly, and a detection assembly. A hydraulic rod is connected to the upper part of the protective frame, and a pressure sensor is connected to the telescopic end of the hydraulic rod. A pressure plate is connected to the lower side of the pressure sensor, and the pressure plate is slidably connected to the protective frame. An electric actuator is connected to the lower inner side of the rear of the protective frame, and a placement platform is connected to the telescopic end of the electric actuator. The placement platform is slidably connected to the protective frame. A rack is connected to the lower inner side of the rear of the protective frame, and the rack is located to the right of the electric actuator. A clamping assembly capable of clamping concrete specimens is provided on the placement platform, and a detection assembly capable of detecting cracks in the concrete specimens is provided on the protective frame.

[0007] As a preferred technical solution of this utility model, the protective frame is made of transparent material on all four sides.

[0008] As a preferred technical solution of this utility model, the clamping assembly includes a rotating disk, a toothed ring, a clamping frame and a pulley. The rotating disk is rotatably connected inside the placement platform, and the toothed ring is connected to the rotating disk. Multiple clamping frames are slidably connected to the placement platform, and the clamping frames are all slidably engaged with the rotating disk. A pulley is rotatably connected to the right side of the placement platform.

[0009] As a preferred technical solution of this utility model, the clamping frame is provided with a buffer pad.

[0010] As a preferred technical solution of this utility model, the detection component includes a compression frame, a first telescopic spring, an ultrasonic detector, and a second telescopic spring. The compression frame is slidably connected to the lower right side of the protective frame, and the pulley is in compression engagement with the compression frame. Two first telescopic springs are connected between the compression frame and the protective frame. An ultrasonic detector is slidably connected to the upper part of the compression frame, and the ultrasonic detector is connected to the compression frame via second telescopic springs at both the front and rear ends.

[0011] As a preferred technical solution of this utility model, the hydraulic rod, pressure sensor, electric actuator, ultrasonic detector and processor are electrically connected through a control module.

[0012] Beneficial effects: 1. When the placement platform of this utility model moves backward, it drives the rotating disk and the gear ring to move backward, so that the gear ring and the rack mesh and rotate, causing the rotating disk to rotate, so that the clamping frames move closer to each other to clamp the concrete specimen, thereby automatically fixing the concrete specimen.

[0013] 2. As the placement platform moves backward, it drives the pulley to move backward, causing the pulley to push the extrusion frame to move to the left. The first telescopic spring is compressed and contracted, which in turn causes the ultrasonic detector to move to the left. Through the force of the second telescopic spring, the ultrasonic detector is brought into close contact with the concrete specimen, thereby enabling automatic crack detection of the concrete specimen. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0015] Figure 2 This is a three-dimensional structural diagram of the protective frame and hydraulic rod of this utility model.

[0016] Figure 3 This is a three-dimensional structural diagram of the rotating disk and clamping frame of this utility model.

[0017] Figure 4 This is a three-dimensional structural diagram of the extrusion frame and ultrasonic testing instrument of this utility model.

[0018] Among them: 1-protective frame, 2-hydraulic rod, 3-pressure plate, 4-pressure sensor, 5-electric push rod, 6-placement platform, 7-rack, 8-rotary disk, 9-gear ring, 10-clamping frame, 11-pulley, 12-extrusion frame, 13-first telescopic spring, 14-ultrasonic detector, 15-second telescopic spring. Detailed Implementation

[0019] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the present invention.

[0020] A test device for detecting damage and cracks in concrete specimens, such as Figures 1-4 As shown, the system includes a protective frame 1, a hydraulic rod 2, a pressure plate 3, a pressure sensor 4, an electric actuator 5, a placement platform 6, a rack 7, a clamping assembly, and a detection assembly. The upper part of the protective frame 1 is connected to the hydraulic rod 2. All four sides of the protective frame 1 are made of transparent material to facilitate the observation of the concrete specimen. The extension end of the hydraulic rod 2 is connected to the pressure sensor 4, and the pressure plate 3 is connected to the lower side of the pressure sensor 4. The pressure plate 3 is slidably connected to the protective frame 1. The lower inner rear part of the protective frame 1 is connected to the electric actuator 5. The extension end of the electric actuator 5 is connected to the placement platform 6, and the placement platform 6 is slidably connected to the protective frame 1. The lower inner rear part of the protective frame 1 is connected to the rack 7, which is located to the right of the electric actuator 5. The placement platform 6 is equipped with a clamping assembly, and the protective frame 1 is equipped with a detection assembly.

[0021] like Figures 1-3 As shown, the clamping assembly includes a rotating disk 8, a gear ring 9, clamping frames 10, and pulleys 11. The rotating disk 8 is rotatably connected inside the placement platform 6, and the gear ring 9 is connected to the rotating disk 8. Four clamping frames 10 are slidably connected to the placement platform 6. Each clamping frame 10 is equipped with a buffer pad to avoid damaging the concrete specimen. The clamping frames 10 are all slidably engaged with the rotating disk 8. The right side of the placement platform 6 is rotatably connected to the pulleys 11.

[0022] like Figure 1 and Figure 4As shown, the detection assembly includes a compression frame 12, a first telescopic spring 13, an ultrasonic detector 14, and a second telescopic spring 15. The compression frame 12 is slidably connected to the lower right side of the protective frame 1. The pulley 11 is in compression engagement with the compression frame 12. Two first telescopic springs 13 are connected between the compression frame 12 and the protective frame 1. The ultrasonic detector 14 is slidably connected to the upper part of the compression frame 12. The hydraulic rod 2, pressure sensor 4, electric push rod 5, ultrasonic detector 14, and processor are electrically connected through a control module. The ultrasonic detector 14 is connected to the compression frame 12 via second telescopic springs 15 at both the front and rear.

[0023] When using this utility model, first place the protective frame 1 in the concrete specimen damage and crack detection test area, then place the concrete specimen on the placement platform 6. After placement, the processor starts the electric actuator 5 through the control module, which drives the placement platform 6 to move backward so that the concrete specimen is located under the pressure plate 3. Then, the hydraulic rod 2 is started to push the pressure plate 3 downward to apply pressure to the concrete specimen. The pressure sensor 4 detects the applied pressure to facilitate control and adjustment. When the placement platform 6 moves backward, it drives the rotating disk 8 and the gear ring 9 to move backward, so that the gear ring 9 meshes with the rack 7, driving the rotating disk 8 to rotate, so that the clamping frame 10 moves closer to each other to clamp the concrete specimen, thereby automatically fixing the concrete specimen. As the placement platform 6 moves backward, it drives the pulley 11 to move backward, causing the pulley 11 to push the extrusion frame 12 to move to the left. The first telescopic spring 13 is compressed and contracts, which in turn causes the ultrasonic detector 14 to move to the left. Through the force of the second telescopic spring 15, the ultrasonic detector 14 is pressed tightly against the concrete specimen to detect whether cracks occur in the concrete specimen after compression. Based on the test results, the compressive strength of the concrete specimen is determined, thus enabling automatic crack detection of the concrete specimen. After the test is completed, the electric actuator 5 is activated to push the placement platform 6 forward. At this time, the gear ring 9 and the rack 7 mesh, causing the clamping frame 10 to move away from each other and no longer clamp the concrete specimen, so as to facilitate the removal of the concrete specimen. At the same time, the pulley 11 disengages from the extrusion frame 12, and the first telescopic spring 13 rebounds, causing the extrusion frame 12 to move to the right and reset.

[0024] Those skilled in the art should understand that the above embodiments do not limit the present invention in any way, and all technical solutions obtained by means of equivalent substitution or equivalent transformation fall within the protection scope of the present invention.

Claims

1. A test device for detecting damage and cracks in concrete specimens, characterized in that: The device includes a protective frame (1), a hydraulic rod (2), a pressure plate (3), a pressure sensor (4), an electric actuator (5), a placement platform (6), a rack (7), a clamping assembly, and a detection assembly. The upper part of the protective frame (1) is connected to the hydraulic rod (2), the extension end of the hydraulic rod (2) is connected to the pressure sensor (4), the lower side of the pressure sensor (4) is connected to the pressure plate (3), the pressure plate (3) is slidably connected to the protective frame (1), the lower inner side of the rear of the protective frame (1) is connected to the electric actuator (5), the extension end of the electric actuator (5) is connected to the placement platform (6), the placement platform (6) is slidably connected to the protective frame (1), the lower inner side of the rear of the protective frame (1) is connected to the rack (7), the rack (7) is located to the right of the electric actuator (5), the placement platform (6) is equipped with a clamping assembly that can clamp concrete specimens, and the protective frame (1) is equipped with a detection assembly that can detect cracks in concrete specimens.

2. The test device for detecting damage and cracks in concrete specimens as described in claim 1, characterized in that: The protective frame (1) is made of transparent material on all four sides.

3. The test device for detecting damage and cracks in concrete specimens as described in claim 1, characterized in that: The clamping assembly includes a rotating disk (8), a gear ring (9), a clamping frame (10), and a pulley (11). The rotating disk (8) is rotatably connected inside the placement platform (6), and the gear ring (9) is connected on the rotating disk (8). Multiple clamping frames (10) are slidably connected on the placement platform (6), and the clamping frames (10) are all slidably engaged with the rotating disk (8). The pulley (11) is rotatably connected to the right side of the placement platform (6).

4. The test device for detecting damage and cracks in concrete specimens as described in claim 3, characterized in that: Each clamp (10) is equipped with a buffer pad.

5. The test device for detecting damage and cracks in concrete specimens as described in claim 1, characterized in that: The testing components include a compression frame (12), a first telescopic spring (13), an ultrasonic detector (14), and a second telescopic spring (15). The compression frame (12) is slidably connected to the lower right side of the protective frame (1). The pulley (11) is pressed and engaged with the compression frame (12). The compression frame (12) and the protective frame (1) are connected by two first telescopic springs (13) at the front and back. The ultrasonic detector (14) is slidably connected to the upper part of the compression frame (12). The ultrasonic detector (14) is connected to the compression frame (12) at both the front and back by second telescopic springs (15).

6. The test device for detecting damage and cracks in concrete specimens as described in claim 5, characterized in that: The hydraulic rod (2), pressure sensor (4), electric actuator (5), ultrasonic detector (14) and processor are electrically connected through the control module.

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