A concrete test piece deformation detection device

Abstract

The utility model discloses a kind of concrete test piece deformation detection devices, including outer frame, the inner support is fixedly connected in outer frame, mobile mechanism and clamping mechanism are arranged on the inner support, and the clamping mechanism is arranged in the middle part of mobile mechanism;The clamping mechanism includes hydraulic rod, and the hydraulic rod output end is fixedly connected with extrusion plate, and the extrusion plate output end is fixedly connected with first connecting rod, and the first connecting rod outside is provided with telescopic spring;A kind of concrete test piece deformation detection device is combined by telescopic spring and rubber buffer layer in clamping mechanism, when hydraulic rod drives extrusion block to clamp test piece, by elastic deformation absorption pressure, avoid rigid contact to cause test piece surface damage, especially suitable for high-strength or brittle concrete test piece, again cooperate extrusion block, second connecting rod and telescopic spring are evenly divided and set on extrusion plate, ensure that test piece is evenly stressed in clamping process, prevent local stress concentration and lead to test piece breakage.

Description

Technical Field

[0001] This utility model relates to the field of concrete testing technology, specifically a device for detecting the deformation of concrete specimens. Background Technology

[0002] Concrete, as a core material in construction, bridges, and water conservancy projects, directly determines the load-bearing capacity and stability of a structure through its mechanical properties. During the service life of an engineering project, concrete structures are subjected to long-term environmental erosion and dynamic loads, inevitably leading to aging and damage. Regularly conducting deformation tests on concrete specimens is a crucial means of real-time monitoring the health of structures. By comparing deformation data from different periods, key information such as crack propagation trends and strength attenuation can be accurately captured, providing early warnings of potential safety hazards and offering a scientific basis for structural maintenance and reinforcement.

[0003] However, existing methods of directly clamping specimens with rigid grippers lack buffering and force control mechanisms, making them prone to testing errors. On the one hand, operators struggle to precisely control the clamping force; excessive pressure can create indentations and induce cracks on the specimen surface, directly altering the internal stress distribution. On the other hand, rigid contact is unsuitable for the characteristics of concrete of different strength grades, particularly detrimental to high-strength or brittle specimens. This pre-testing human-caused damage results in deformation data that deviates significantly from the actual mechanical properties, not only wasting specimen resources but also potentially leading to misjudgments of concrete quality, thereby threatening the safety and durability of engineering structures.

[0004] To address these issues, this invention provides a concrete specimen deformation detection device. Utility Model Content

[0005] To address the shortcomings of existing technologies, this invention provides a concrete specimen deformation detection device, which solves the aforementioned problems.

[0006] To achieve the above objectives, this utility model is implemented through the following technical solution: A concrete specimen deformation detection device, comprising an outer frame, characterized in that: an inner support is fixedly connected inside the outer frame, and a moving mechanism and a clamping mechanism are provided on the inner support, wherein the clamping mechanism is located in the middle of the moving mechanism; The clamping mechanism includes a hydraulic rod, with a pressing plate fixedly connected to the output end of the hydraulic rod. A plurality of first connecting rods are fixedly connected to the output end of the pressing plate. A telescopic spring is provided on the outside of the first connecting rod. A second connecting rod is slidably connected to the outside of the first connecting rod. One end of the hydraulic rod abuts against the pressing plate and the other end abuts against the second connecting rod. A pressing block is fixedly connected to the end of the second connecting rod away from the first connecting rod.

[0007] Optionally, a temperature sensor and a humidity sensor are installed inside the outer frame, the joints of the outer frame are sealed, and a heating device is installed inside the outer frame.

[0008] Optionally, a first fixing plate is fixedly connected to the inner bracket, a second fixing plate is fixedly connected to the first fixing plate, a laser displacement sensor is provided on the second fixing plate, a fourth fixing plate is fixedly connected to the first fixing plate, and a camera is fixedly connected to the fourth fixing plate.

[0009] Optionally, the moving mechanism includes a first synchronous drive motor, which is mounted on an inner support. A first lead screw is fixedly connected to the output end of the first synchronous drive motor, and a first moving block is threaded onto the first lead screw.

[0010] Optionally, a second moving block is fixedly connected to the side end of the first moving block, a first slider is fixedly connected to the lower side of the second moving block, a slide rail is fixedly connected to the inner bracket, the first slider is slidably connected to the slide rail, and a third fixing plate is fixedly connected to the side end of the second moving block.

[0011] Optionally, a second synchronous drive motor is provided on the third fixed plate, a second lead screw is fixedly connected to the output end of the second synchronous drive motor, a guide rod is fixedly connected to the third fixed plate, a second movable plate is provided on the front side of the third fixed plate, a third movable block is fixedly connected to one end of the second movable plate near the third fixed plate, a second slider is fixedly connected to one end of the second movable plate near the third fixed plate, the second slider is movably connected to the guide rod, and the third movable block is threadedly connected to the second lead screw.

[0012] Optionally, the clamping mechanism further includes an electric turntable, which is rotatably connected to the first fixed plate. The electric turntable is provided with a plurality of electric push rods, and the rotation angle of the electric turntable is limited to 180 degrees. The telescopic spring, the second connecting rod, and the extrusion block are evenly distributed on the extrusion plate.

[0013] Beneficial effects This invention provides a device for detecting the deformation of concrete specimens. Compared with the prior art, it has the following advantages: (1) A concrete specimen deformation detection device, wherein the telescopic spring in the clamping mechanism is combined with the rubber buffer layer, and when the hydraulic rod drives the extrusion block to clamp the specimen, the pressure is absorbed by elastic deformation, avoiding rigid contact that could cause damage to the specimen surface. It is particularly suitable for high-strength or brittle concrete specimens. Furthermore, the extrusion block, the second connecting rod and the telescopic spring are evenly distributed on the extrusion plate to ensure that the specimen is subjected to uniform force during the clamping process, and to prevent local stress concentration that could lead to specimen breakage.

[0014] (2) A concrete specimen deformation detection device, which combines a temperature sensor, a humidity sensor and a heating device with a sealed outer frame, can simulate different environmental conditions, realize real-time monitoring and automatic adjustment of environmental parameters, ensure that the test data is not affected by the external environment, isolate dust and water vapor, protect internal precision components, and extend the service life of the device. Attached Figure Description

[0015] Figure 1 This is a side view of the outer frame structure of this utility model; Figure 2 This is an internal side view of the outer frame of this utility model; Figure 3 This is a side view of the internal structure of the outer frame of this utility model; Figure 4 This is a side view of the clamping mechanism of this utility model.

[0016] In the diagram: 1. Outer frame; 2. Inner support; 3. First fixing plate; 4. Second fixing plate; 5. Laser displacement sensor; Moving mechanism: 61. First synchronous drive motor; 62. First lead screw; 63. Second moving block; 64. Slide rail; 65. First slider; 66. Third fixed plate; 67. Second lead screw; 68. Second synchronous drive motor; 69. Guide rod; 691. Second moving plate; Clamping mechanism: 71. Hydraulic rod; 72. Extrusion plate; 73. First connecting rod; 74. Telescopic spring; 75. Second connecting rod; 76. Extrusion block; 77. Electric turntable; 78. Electric push rod.

[0017] 8. Fourth fixing plate; 9. Camera. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Example 1: Please see Figure 1-4 A concrete specimen deformation detection device includes an outer frame 1, an inner support 2 fixedly connected inside the outer frame 1, a moving mechanism and a clamping mechanism being provided on the inner support 2, and the clamping mechanism being located in the middle of the moving mechanism. The clamping mechanism includes a hydraulic rod 71, with a pressing plate 72 fixedly connected to the output end of the hydraulic rod 71. Multiple first connecting rods 73 are fixedly connected to the output end of the pressing plate 72. A telescopic spring 74 is provided on the outside of the first connecting rod 73. A second connecting rod 75 is slidably connected to the outside of the first connecting rod 73. One end of the hydraulic rod 71 abuts against the pressing plate 72 and the other end abuts against the second connecting rod 75. A pressing block 76 is fixedly connected to the end of the second connecting rod 75 away from the first connecting rod 73.

[0020] Temperature and humidity sensors are installed inside the outer frame 1. The joints of the outer frame 1 are sealed. Heating equipment is installed inside the outer frame 1.

[0021] A first fixing plate 3 is fixedly connected to the inner bracket 2. A second fixing plate 4 is fixedly connected to the first fixing plate 3. A laser displacement sensor 5 is installed on the second fixing plate 4. A fourth fixing plate 8 is fixedly connected to the first fixing plate 3. A camera 9 is fixedly connected to the fourth fixing plate 8.

[0022] The moving mechanism includes a first synchronous drive motor 61, which is mounted on the inner bracket 2. The output end of the first synchronous drive motor 61 is fixedly connected to a first lead screw 62, and a first moving block is threaded onto the first lead screw 62.

[0023] A second moving block 63 is fixedly connected to the side of the first moving block, a first slider 65 is fixedly connected to the lower side of the second moving block 63, a slide rail 64 is fixedly connected to the inner bracket 2, the first slider 65 is slidably connected to the slide rail 64, and a third fixing plate 66 is fixedly connected to the side of the second moving block 63.

[0024] A second synchronous drive motor 68 is provided on the third fixed plate 66. A second lead screw 67 is fixedly connected to the output end of the second synchronous drive motor 68. A guide rod 69 is fixedly connected to the third fixed plate 66. A second movable plate 691 is provided on the front side of the third fixed plate 66. A third movable block is fixedly connected to the end of the second movable plate 691 near the third fixed plate 66. A second slider is fixedly connected to the end of the second movable plate 691 near the third fixed plate 66. The second slider is movably connected to the guide rod 69. The third movable block is threadedly connected to the second lead screw 67.

[0025] The clamping mechanism also includes an electric turntable 77, which is rotatably connected to the first fixed plate 3. The electric turntable 77 is provided with a plurality of electric push rods 78. The rotation angle of the electric turntable 77 is limited to 180 degrees. The telescopic spring 74, the second connecting rod 75 and the extrusion block 76 are evenly distributed on the extrusion plate 72.

[0026] Working process: Before placing the specimen, the clamping mechanism 7 is pre-adjusted to its initial position by the first synchronous drive motor 61 and the second synchronous drive motor 68; after the specimen is placed in the center of the electric turntable 77, the four electric push rods 78 extend synchronously for pre-clamping; then the hydraulic rod 71 pushes the extrusion block 76 for secondary clamping, and the telescopic spring 74 and the built-in rubber buffer layer form a double buffer to avoid damage to the specimen surface. When the electric turntable 77 adjusts the detection angle, the laser displacement sensor 5 automatically triggers the calibration program, and the built-in three-point positioning algorithm compensates for the detection error caused by the angle change.

[0027] Open the outer frame 1, placing the concrete specimen in the center of the electric turntable 77. Turn on the heating equipment, using temperature and humidity sensors to control the temperature inside the outer frame 1, which is monitored in real time by camera 9. Then, start the synchronous drive motor 61, which rotates the first lead screw 62. The rotation of the first lead screw 62 causes the moving block 63 and the first slider 65 to move along the slide rail 64, thereby adjusting the horizontal position of the extrusion plate 72. Then, start the second synchronous drive motor 68, which rotates the second lead screw 67, causing the second moving plate 691 to move up and down along the smooth rod 69, thereby adjusting the height position of the extrusion plate 72. Then, the hydraulic rod 71 is activated to push the extrusion plate 72 inward, and the extrusion block 76 extrudes the concrete specimen. The extrusion block 76 is subjected to the reverse force of the concrete specimen and the extrusion force of the hydraulic rod 71 pushing the first connecting rod 73 towards the second connecting rod 75, thereby causing the first connecting rod 73 to extend and retract towards the second connecting rod 75. The elasticity of the extension spring 74 is used to buffer the force, and the material of the extrusion block 76 is soft, thereby reducing the damage to the extruded concrete specimen. Then, the deformation of the concrete specimen is detected by the sensor 5 using the detection principle of the sensor 5. This detection principle is a common inspection principle and will not be described in detail.

[0028] The second synchronous drive motor 68, the second moving plate 691, and the second lead screw 67 enable the second connecting rod 75 to place the clamped concrete specimen on the electric turntable 77. The four electric push rods 78 clamp the concrete specimen, and the electric turntable 77 rotates to adjust the detection angle of the concrete specimen to be tested, recalibrating the detection position of the laser displacement sensor 5. The clamping mechanism then clamps the concrete specimen again, and the sensor 5 performs the test to ensure comprehensive detection.

[0029] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0030] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for detecting deformation of concrete specimens, comprising an outer frame (1), characterized in that: An inner support (2) is fixedly connected inside the outer frame (1). A moving mechanism and a clamping mechanism are provided on the inner support (2). The clamping mechanism is located in the middle of the moving mechanism. The clamping mechanism includes a hydraulic rod (71), the output end of which is fixedly connected to a pressing plate (72), the output end of which is fixedly connected to a plurality of first connecting rods (73), a telescopic spring (74) is provided on the outside of the first connecting rod (73), and a second connecting rod (75) is slidably connected on the outside of the first connecting rod (73). One end of the hydraulic rod (71) abuts against the pressing plate (72) and the other end abuts against the second connecting rod (75), and a pressing block (76) is fixedly connected to the end of the second connecting rod (75) away from the first connecting rod (73).

2. The concrete specimen deformation detection device according to claim 1, characterized in that: A temperature sensor and a humidity sensor are installed inside the outer frame (1). The connection of the outer frame (1) is sealed. A heating device is installed inside the outer frame (1).

3. The concrete specimen deformation detection device according to claim 2, characterized in that: The inner bracket (2) is fixedly connected to a first fixing plate (3), the first fixing plate (3) is fixedly connected to a second fixing plate (4), the second fixing plate (4) is provided with a laser displacement sensor (5), the first fixing plate (3) is fixedly connected to a fourth fixing plate (8), and the fourth fixing plate (8) is fixedly connected to a camera (9).

4. The concrete specimen deformation detection device according to claim 3, characterized in that: The moving mechanism includes a first synchronous drive motor (61), which is mounted on the inner bracket (2). The output end of the first synchronous drive motor (61) is fixedly connected to a first lead screw (62), and a first moving block is threaded onto the first lead screw (62).

5. The concrete specimen deformation detection device according to claim 4, characterized in that: The first movable block is fixedly connected to the side end of the second movable block (63), the second movable block (63) is fixedly connected to the lower side of the first slider (65), the inner bracket (2) is fixedly connected to the slide rail (64), the first slider (65) is slidably connected to the slide rail (64), and the second movable block (63) is fixedly connected to the side end of the third fixed plate (66).

6. The concrete specimen deformation detection device according to claim 5, characterized in that: A second synchronous drive motor (68) is provided on the third fixed plate (66). A second lead screw (67) is fixedly connected to the output end of the second synchronous drive motor (68). A light rod (69) is fixedly connected to the third fixed plate (66). A second movable plate (691) is provided on the front side of the third fixed plate (66). A third movable block is fixedly connected to one end of the second movable plate (691) near the third fixed plate (66). A second slider is fixedly connected to one end of the second movable plate (691) near the third fixed plate (66). The second slider is movably connected to the light rod (69). The third movable block is threadedly connected to the second lead screw (67).

7. The concrete specimen deformation detection device according to claim 3, characterized in that: The clamping mechanism also includes an electric turntable (77), which is rotatably connected to the first fixed plate (3). The electric turntable (77) is provided with a plurality of electric push rods (78). The rotation angle of the electric turntable (77) is limited to 180 degrees. The telescopic spring (74), the second connecting rod (75) and the extrusion block (76) are evenly distributed on the extrusion plate (72).

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