Concrete opening crack depth detection device

Abstract

A concrete opening crack depth detection device relates to the field of concrete and comprises a bottom plate, a sliding mechanism is arranged on the bottom plate, a vertical assembly is fixedly connected to the sliding mechanism, a sliding sleeve is arranged at the upper end of the vertical assembly, a horizontal rod is slidably matched in the sliding sleeve, an excitation assembly is arranged at the end of the horizontal rod, and the excitation assembly is fixedly connected to the vertical assembly. A driving mechanism is installed on the sliding sleeve and can drive the shock excitation assembly to move. A sensor supporting frame is arranged between the bottom plate and the vertical assembly. The sliding mechanism, the vertical assembly, the sensor supporting frame and other mechanical structures jointly ensure the stability and the positioning precision of the detection device, the intelligent design of the driving mechanism and the excitation assembly improves the automation degree and the accuracy of detection, and an efficient and accurate solution is provided for concrete crack depth detection.

Description

Technical Field

[0001] The utility model relates to the technical field of concrete, in particular to a device for detecting the depth of concrete opening cracks. Background Art

[0002] The impact of cracks on concrete structures cannot be underestimated. Once the depth and width of the cracks exceed the critical value that the concrete structure can withstand, it will not only affect the appearance of the structure, but more importantly, it may damage the integrity and bearing capacity of the concrete structure, thus affecting its normal use. In extreme cases, serious cracks may even cause safety accidents, posing huge risks to personal and property safety. Therefore, the detection and prevention of concrete cracks are particularly important. Traditional crack detection methods mainly rely on technicians to observe with the naked eye. Although this method is simple to operate, it has obvious disadvantages: first, it is very time-consuming and labor-intensive, requiring technicians to carefully inspect each part; second, the accuracy of this method is highly dependent on the experience and skills of the technicians; third, the results of naked eye detection are easily affected by the subjective judgment of the technicians, resulting in low measurement accuracy.

[0003] Chinese patent CN116147547A discloses a nondestructive testing system that attempts to detect cracks by striking concrete structures with a vibrating hammer. However, this method requires manual pre-measurement and setting of the spacing between striking points during implementation, which is not only cumbersome, but also greatly prolongs the detection time and reduces work efficiency. In addition, reliance on manual measurement may also introduce additional errors, affecting the accuracy of the detection results. Utility Model Content

[0004] The purpose of the utility model is to solve the problems raised in the above background technology, and then proposes a device for detecting the depth of concrete opening cracks.

[0005] The technical solution adopted by the utility model to solve its technical problems is:

[0006] A device for detecting the depth of concrete cracks, comprising a bottom plate, a sliding mechanism is arranged on the bottom plate, a vertical component is fixedly connected to the sliding mechanism, a sliding sleeve is arranged at the upper end of the vertical component, a horizontal rod is slidably fitted in the sliding sleeve, a vibration component is arranged at the end of the horizontal rod, a driving mechanism is installed on the sliding sleeve, and the driving mechanism can drive the vibration component to move. A sensor support frame is arranged between the bottom plate and the vertical component.

[0007] Furthermore, the sliding mechanism includes a slide rail, a slider and a tightening bolt. The slide rail is fixedly connected to the base plate. The slide rail is slidably fitted with a slider. The slider is threadedly connected with a tightening bolt. The tightening bolt can enable the slider to move along the slide rail and be positioned at a place on the slide rail.

[0008] Furthermore, the vertical assembly includes a vertical tube, an inner rod is slidably fitted inside the vertical tube, the lower end of the vertical tube is fixedly connected to the slider, the upper end of the inner rod is installed with a sliding sleeve, and a tightening knob is provided on the vertical tube, and the tightening knob can enable the inner rod to move along the vertical tube and position it at a place on the vertical tube.

[0009] Furthermore, the driving mechanism includes a driving motor, the driving motor is connected to a gear, a rack is provided on one side of the horizontal rod, and the gear matches the rack.

[0010] Furthermore, the excitation assembly includes an excitation box, a slide groove is formed on the top of the excitation box, a moving block is slidably fitted in the slide groove, a lower plate is provided at the lower end of the moving block, a flexible spring is provided between the lower plate and the left inner wall of the excitation box, a telescopic electric cylinder is provided inside the excitation box, a mounting plate is provided at the upper end of the moving block, an excitation hammer is provided on the mounting plate, and a second acceleration sensor is connected to the excitation hammer.

[0011] Furthermore, when the telescopic rod of the telescopic electric cylinder is extended, it can clamp the lower plate to limit the moving block from moving toward the left inner wall of the excitation box under the action of the flexible spring.

[0012] Furthermore, the sensor support frame includes a clamp, which is fixedly installed on the vertical tube, and the clamp is connected to a horizontal connecting plate. A support rod is provided between the horizontal connecting plate and the bottom plate, and a plurality of plug holes are provided on the horizontal connecting plate. Positioning rods are inserted into the plug holes, and the positioning rods are fixedly connected to the horizontal connecting plate by an upper tightening nut and a lower tightening nut. A supporting top plate is provided on the upper end of the positioning rod, and a first acceleration sensor is installed at the concrete structure of the beam corresponding to the supporting top plate.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention realizes flexible and stable position adjustment, precise automatic control and controllable excitation mode through ingenious structural design, providing an efficient and accurate solution for the detection of concrete crack depth. Its mechanical structures such as sliding mechanism, vertical assembly and sensor support frame jointly ensure the stability and positioning accuracy of the detection device, while the intelligent design of the driving mechanism and excitation assembly improves the automation and accuracy of the detection. Overall, the device not only improves the efficiency and accuracy of crack detection, but also reduces the difficulty of operation, providing strong support for the safety assessment and maintenance of concrete structures. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the utility model;

[0015] Figure 2 is a schematic diagram of the structure of the driving mechanism;

[0016] Figure 3 It is the structural schematic diagram of the excitation box;

[0017] Among them: 1 bottom plate, 21 slide rail, 22 slider, 23 tightening bolt, 31 vertical tube, 32 tightening knob, 33 inner rod, 41 sliding sleeve, 42 horizontal rod, 43 driving motor, 44 gear, 45 rack, 5 excitation assembly, 51 excitation box, 52 slide, 53 telescopic electric cylinder, 54 moving block, 55 mounting plate, 56 excitation hammer, 57 lower plate, 59 flexible spring, 61 clamp, 63 horizontal connecting plate, 64 support rod, 65 positioning rod, 66 upper tightening nut, 67 lower tightening nut, 68 support top plate. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. The utility model is further described in combination with the drawings and embodiments:

[0019] like Figure 1-Figure 3 As shown, a device for detecting the depth of open cracks in concrete comprises a base plate 1, on which a sliding mechanism is provided, to which a vertical component is fixedly connected, a sliding sleeve 41 is provided at the upper end of the vertical component, a horizontal rod 42 is slidably fitted in the sliding sleeve, a vibration component 5 is provided at the end of the horizontal rod, a driving mechanism is installed on the sliding sleeve, and the driving mechanism can drive the vibration component to move. A sensor support frame is provided between the base plate and the vertical component. The design of the sliding mechanism, the slider and the tightening bolts makes the detection device flexible and stable, and is convenient for adjusting the position of the vibration component to meet the crack detection needs at different positions.

[0020] In at least one embodiment, the sliding mechanism includes a slide rail 21, a slider 22 and a tightening bolt 23. The slide rail is fixedly connected to the bottom plate, the slide rail is slidably matched with the slider, and the slider is threadedly connected with the tightening bolt, and the tightening bolt can make the slider move along the slide rail and be positioned at a point on the slide rail. The combination of the slide rail, the slider and the tightening bolt allows the detection device to be located close to or away from the concrete structure, which is convenient for operators to perform accurate detection in complex environments.

[0021] In at least one embodiment, the vertical assembly includes a vertical tube 31, an inner rod 33 is slidably fitted inside the vertical tube, the lower end of the vertical tube is fixedly connected to the slider, a sliding sleeve is installed on the upper end of the inner rod, and a tightening knob 32 is provided on the vertical tube, and the tightening knob can make the inner rod move along the vertical tube and be positioned at a point on the vertical tube. The sliding fit between the vertical tube and the inner rod, through the positioning function of the tightening knob, can realize the flexible adjustment of the detection device in the vertical direction to meet the detection requirements of cracks of different heights.

[0022] In at least one embodiment, the driving mechanism includes a driving motor 43, the driving motor is connected to a gear 44, and in cooperation with the driving motor, a rack 45 is provided on one side of the horizontal rod, and the gear and the rack are matched. The combination of the driving motor, the gear and the rack provides automation and precise control for the detection device, so that the excitation component can be accurately moved to a predetermined position, thereby improving the detection efficiency and accuracy.

[0023] In at least one embodiment, the excitation assembly includes an excitation box 51, a slide groove 52 is formed on the top of the excitation box, a moving block 54 is slidably fitted in the slide groove, a lower plate 57 is provided at the lower end of the moving block, a flexible spring 59 is provided between the lower plate and the left inner wall of the excitation box, a telescopic electric cylinder 53 is provided inside the excitation box, a mounting plate 55 is provided at the upper end of the moving block, an excitation hammer 56 is provided on the mounting plate, and a second acceleration sensor is connected to the excitation hammer. The design of the excitation assembly realizes controllable excitation of the concrete structure through the cooperation of the flexible spring and the telescopic electric cylinder, providing an effective means for accurate detection of crack depth.

[0024] Furthermore, when the telescopic rod of the telescopic electric cylinder is extended, it can clamp the lower plate to limit the moving block from moving toward the left inner wall of the excitation box under the action of the flexible spring. The function of the telescopic electric cylinder further enhances the controllability and stability of the excitation component, ensuring the accurate application of the excitation force during the detection process.

[0025] In at least one embodiment, the sensor support frame includes a clamp 61, which is fixedly mounted on the vertical pipe, and the clamp is connected to a horizontal connecting plate 63. A support rod 64 is provided between the horizontal connecting plate and the bottom plate, and a plurality of plug holes are provided on the horizontal connecting plate. A positioning rod 65 is inserted into the plug hole, and the positioning rod is fixedly connected to the horizontal connecting plate through an upper tightening nut 66 and a lower tightening nut 67. A support top plate 68 is provided at the upper end of the positioning rod, and a first acceleration sensor is installed at the concrete structure of the beam corresponding to the support top plate, wherein the first acceleration sensor and the excitation hammer are symmetrically arranged on both sides of the open crack of the concrete to be tested. The first acceleration sensor and the second acceleration sensor are both connected to the detection device. The stable structure of the sensor support frame ensures the accurate installation and measurement of the acceleration sensor, and the symmetrical layout with the excitation component helps to accurately capture the response of the crack to the excitation signal, thereby improving the accuracy and reliability of crack depth detection.

[0026] Working method: Place the base plate on the concrete structure to be inspected to ensure stability. Adjust the position of the vertical assembly through the sliding mechanism (including slide rails, sliders and tightening bolts) to ensure that it is aligned with the crack position. Fix the slider with tightening bolts to ensure that the equipment will not move during the inspection process.

[0027] Fix the clamp on the vertical pipe and connect it to the bottom plate through the horizontal connecting plate and the support rod to ensure its stability. Install the first acceleration sensor on the supporting top plate and ensure that it is symmetrically set with the exciting hammer on both sides of the crack. Adjust the height of the positioning rod and fix it with the upper tightening nut and the lower tightening nut.

[0028] The position of the horizontal rod and the excitation assembly is adjusted by the drive mechanism (including the drive motor, gear and rack) to align it with the crack. In the excitation box, the movement of the excitation hammer is controlled by the telescopic electric cylinder and the flexible spring. The telescopic electric cylinder is started to extend its telescopic rod and clamp the lower plate to limit the movement of the moving block under the action of the flexible spring. The concrete structure is struck by the excitation hammer on the mounting plate to generate elastic waves.

[0029] Ensure that the first acceleration sensor and the second acceleration sensor are connected to the detection equipment. Perform tapping excitation and collect data when the elastic wave passes through the crack. Use the acquisition system of the detection equipment to save the data to ensure the validity of the data. Perform parameter regression calculations through background processing of the collected data. Establish an equation based on the time difference of the elastic wave passing through the same crack at three different distances (such as L = 0.1m, 0.2m, 0.3m). By solving the equation, obtain information on the crack depth, elastic wave velocity and crack inclination angle.

[0030] The above shows and describes the basic principles, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions in the specification are only to illustrate the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the protection required by the utility model. The scope of protection required by the utility model is defined by the attached claims and their equivalents.

Claims

1. A device for detecting the depth of concrete cracks, characterized in that: It includes a base plate, a sliding mechanism is provided on the base plate, a vertical component is fixedly connected to the sliding mechanism, a sliding sleeve is provided at the upper end of the vertical component, a horizontal rod is slidably fitted in the sliding sleeve, an excitation component is provided at the end of the horizontal rod, a driving mechanism is installed on the sliding sleeve, the driving mechanism can drive the excitation component to move, and a sensor support frame is provided between the base plate and the vertical component.

2. The device for detecting the depth of concrete opening cracks according to claim 1, characterized in that: The sliding mechanism includes a sliding rail, a slider and a tightening bolt. The sliding rail is fixedly connected to the base plate. The sliding rail is slidably matched with the slider. The slider is threadedly connected with the tightening bolt. The tightening bolt can enable the slider to move along the sliding rail and be positioned at a place on the sliding rail.

3. The device for detecting the depth of concrete opening cracks according to claim 2, characterized in that: The vertical assembly includes a vertical tube, an inner rod is slidably fitted inside the vertical tube, the lower end of the vertical tube is fixedly connected to a slider, a sliding sleeve is installed on the upper end of the inner rod, and a tightening knob is provided on the vertical tube, which can enable the inner rod to move along the vertical tube and position it at a place on the vertical tube.

4. The device for detecting the depth of concrete opening cracks according to any one of claims 1 to 3, characterized in that: The driving mechanism comprises a driving motor, the driving motor is connected with a gear, a rack is arranged on one side of the horizontal rod, and the gear matches with the rack.

5. The device for detecting the depth of concrete opening cracks according to claim 1, characterized in that: The excitation assembly includes an excitation box, a slide groove is formed on the top of the excitation box, a moving block is slidably fitted in the slide groove, a lower plate is provided at the lower end of the moving block, a flexible spring is provided between the lower plate and the left inner wall of the excitation box, a telescopic electric cylinder is provided inside the excitation box, a mounting plate is provided at the upper end of the moving block, an excitation hammer is provided on the mounting plate, and a second acceleration sensor is connected to the excitation hammer.

6. The device for detecting the depth of concrete opening cracks according to claim 5, characterized in that: When the telescopic rod of the telescopic electric cylinder is extended, it can clamp the lower plate to limit the moving block from moving toward the direction close to the left inner wall of the excitation box under the action of the flexible spring.

7. The device for detecting the depth of concrete opening cracks according to claim 3, characterized in that: The sensor support frame includes a clamp, which is fixedly installed on the vertical pipe. The clamp is connected to a horizontal connecting plate. A support rod is provided between the horizontal connecting plate and the bottom plate. The horizontal connecting plate is provided with a plurality of plug holes. Positioning rods are inserted into the plug holes. The positioning rod is fixedly connected to the horizontal connecting plate by an upper tightening nut and a lower tightening nut. A supporting top plate is provided at the upper end of the positioning rod. A first acceleration sensor is installed at the concrete structure of the beam corresponding to the supporting top plate.

Images