Concrete crack measuring device

Abstract

The utility model belongs to the technical field of concrete structure crack measurement, and discloses a concrete crack measuring device which comprises a crack defect comprehensive tester, the crack defect comprehensive tester is connected with the two planar transducers; the center positioning plate is vertically arranged, and the two sliding rails are symmetrically arranged on the two sides of the center positioning plate. The measuring scale horizontally penetrates through the central positioning plate, one end of the measuring scale is horizontally embedded into the first sliding rail, and the other end of the measuring scale is horizontally embedded into the second sliding rail; the first positioning mechanism is arranged on the first sliding rail in a sliding mode, and the second positioning mechanism is arranged on the second sliding rail in a sliding mode. The side edge of the first positioning mechanism is provided with a first group of clamping plates, and the first planar transducer is mounted on the first group of clamping plates; the side edge of the second positioning mechanism is provided with a second group of clamping plates, and the second planar transducer is mounted on the second group of clamping plates; according to the utility model, two-way accurate positioning of the planar transducer can be realized, and the accuracy of a concrete crack depth detection result is ensured.

Description

Technical Field

[0001] This utility model belongs to the field of concrete structure crack measurement technology, and specifically relates to a concrete crack measurement device. Background Technology

[0002] With economic development and the continuous improvement of modernization, the scale of construction projects of various types around the world is constantly expanding, and concrete is widely used in the construction of modern civil engineering. Due to the influence of various damage factors, concrete structures often produce many cracks or micro-cracks. The appearance of cracks will directly and indirectly affect the performance of concrete structures. Therefore, detecting the surface crack characteristics of concrete structures is a key step in assessing the degree of damage to concrete structures.

[0003] The HC-F800 concrete crack defect comprehensive tester is widely used in the detection of crack characteristics in concrete structures due to its simple operation, high measurement accuracy, and high cost performance. It uses the ultrasonic principle to detect the depth of concrete cracks. The detection process requires two cylindrical planar transducers to be placed symmetrically on both sides of the concrete crack at a set distance perpendicular to the crack in order to measure the depth of the concrete.

[0004] Currently, when using the HC-F800 concrete crack defect comprehensive tester to detect crack depth, a measuring ruler is often used to draw lines perpendicular to the crack, and then two cylindrical planar transducers are manually held and placed close to the concrete structure surface to make measurements. This measurement process is complicated and time-consuming. Furthermore, manual drawing and manual holding of the transducers lead to a large error in the measurement results. Utility Model Content

[0005] In view of the technical problems existing in the prior art, this utility model provides a concrete crack measuring device to solve the technical problems of complex operation, long time consumption and large measurement error when using the HC-F800 concrete crack defect comprehensive tester to detect crack depth.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] This utility model provides a concrete crack measuring device, including a crack defect comprehensive tester, two planar transducers, a central positioning plate, two slide rails, a measuring ruler, a first positioning mechanism, and a second positioning mechanism;

[0008] The comprehensive crack defect tester is connected to both of the planar transducers.

[0009] The central positioning plate is vertically arranged, and the two slide rails are symmetrically arranged on both sides of the central positioning plate; the measuring ruler horizontally penetrates the central positioning plate, one end of the measuring ruler is horizontally embedded in the inside of the first slide rail, and the other end of the measuring ruler is horizontally embedded in the inside of the second slide rail;

[0010] The first positioning mechanism is slidably mounted on the first slide rail, and the second positioning mechanism is slidably mounted on the second slide rail; the first positioning mechanism has a first set of clamping plates on its side, and the first planar transducer is mounted on the first set of clamping plates; the second positioning mechanism has a second set of clamping plates on its side, and the second planar transducer is mounted on the second set of clamping plates.

[0011] Furthermore, the first set of card plates includes a first card plate and a second card plate, the first card plate being horizontally disposed on the first side of the first positioning mechanism, and the second card plate being horizontally disposed on the second side of the first positioning mechanism;

[0012] The second set of card plates includes a third card plate and a fourth card plate. The third card plate is horizontally disposed on the first side of the second positioning mechanism, and the fourth card plate is horizontally disposed on the second side of the second positioning mechanism.

[0013] The first card plate, the second card plate, the third card plate and the fourth card plate are all rectangular flat plates, and a central circular hole is opened in the center of the rectangular flat plate; wherein, the planar transducer is vertically and concentrically inserted in the central circular hole.

[0014] Furthermore, the center of the central hole on the first card plate, the center of the central hole on the second card plate, and the first end face of the first positioning mechanism are located in the same vertical plane; wherein, the first end face of the first positioning mechanism is the end face of the first positioning mechanism closer to the central positioning plate.

[0015] Furthermore, the center of the central circular hole on the third card plate, the center of the central circular hole on the fourth card plate, and the first end face of the second positioning mechanism are located in the same vertical plane; wherein, the first end face of the second positioning mechanism is the end face of the second positioning mechanism closer to the central positioning plate.

[0016] Furthermore, positioning strips are provided around the central positioning plate; wherein, the positioning strips are arranged along the thickness center line of the central positioning plate, and the positioning strips are used to align with the crack to be tested.

[0017] Furthermore, it also includes two fixing mechanisms, a first positioning rod, a second positioning rod, a third positioning rod, and a fourth positioning rod; the first fixing mechanism is installed on the first slide rail and located at the first end of the measuring ruler; the second fixing mechanism is installed on the second slide rail and located at the second end of the measuring ruler.

[0018] The first positioning rod and the second positioning rod are parallel to each other and symmetrically arranged on both sides of the first slide rail; wherein, the first end of the first positioning rod is connected to the first side of the first positioning mechanism, the second end of the first positioning rod slides through the first side of the first fixing mechanism, and the second end of the first positioning rod can be locked or separated from the first side of the first fixing mechanism; the first end of the second positioning rod is connected to the second side of the first positioning mechanism, the second end of the second positioning rod slides through the second side of the first fixing mechanism, and the second end of the second positioning rod can be locked or separated from the second side of the first fixing mechanism.

[0019] The third and fourth positioning rods are parallel to each other and symmetrically arranged on both sides of the second slide rail; wherein, the first end of the third positioning rod is connected to the first side of the second positioning mechanism, the second end of the third positioning rod slides through the first side of the second fixing mechanism, and the second end of the third positioning rod can be locked or separated from the first side of the second fixing mechanism; the first end of the fourth positioning rod is connected to the second side of the second positioning mechanism, the second end of the fourth positioning rod slides through the second side of the second fixing mechanism, and the second end of the fourth positioning rod can be locked or separated from the second side of the second fixing mechanism.

[0020] Furthermore, the fixing mechanism includes a limiting plate, a first fixing stud, and a second fixing stud;

[0021] The limiting plate is vertically disposed at the end of the measuring ruler and is sleeved on the slide rail; the first positioning rod or the third positioning rod is slidably inserted through the first side of the limiting plate, and the second positioning rod or the fourth positioning rod is slidably inserted through the second side of the limiting plate.

[0022] The first end of the limiting plate is provided with a first threaded hole, and the first fixing stud is fitted into the first threaded hole, and the screw-in end of the first fixing stud is pressed against the side of the first positioning rod or the third positioning rod.

[0023] The second end of the limiting plate is provided with a second threaded hole, and the second fixing stud is fitted into the second threaded hole. The screw-in end of the second fixing stud is tightly connected to the side of the second positioning rod or the fourth positioning rod.

[0024] Furthermore, the first positioning rod, the second positioning rod, the third positioning rod, and the fourth positioning rod have the same structure and all adopt horizontal rods; wherein, a plurality of triangular prism slots are evenly provided on the side wall of the horizontal rod, and the plurality of triangular prism slots are evenly arranged along the axial direction of the horizontal rod and are located away from the slide rail.

[0025] Both the first fixing stud and the second fixing stud are cylindrical studs, and the screw-in end of the cylindrical stud is set as a triangular prism end; wherein, the triangular prism end can be connected to several triangular prism slots.

[0026] Furthermore, the fixing mechanism also includes a third fixing stud and a top plate; a threaded through hole is provided at the center of the plate surface of the limiting plate, and the third fixing stud passes through the threaded through hole; the top plate is installed at the screw-in end of the third fixing stud; wherein, one side of the top plate is fixed to the screw-in end of the third fixing stud, and the other side of the top plate is pressed against the end of the measuring ruler.

[0027] Furthermore, at least one of the fixed mechanisms has a limiting plate that is slidably connected to the corresponding slide rail.

[0028] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0029] The concrete crack measuring device provided by this utility model symmetrically sets slide rails on both sides of the central positioning plate, slides two positioning mechanisms on the slide rails respectively, and installs the planar transducer on the clamping plate on the side of the positioning mechanism. The position adjustment and positioning of the planar transducer is realized by the movement of the positioning mechanism along the slide rail, without the need for manual use of measuring ruler to assist in marking lines and holding the planar transducer by hand. The device has a simple structure, is easy to operate, and can realize bidirectional precise positioning of the planar transducer, thereby ensuring the accuracy of the concrete crack depth detection results. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is a schematic diagram showing the usage state of the concrete crack measuring device described in this utility model;

[0032] Figure 2 This is a schematic diagram of the overall structure of the concrete crack measuring device of this utility model;

[0033] Figure 3 This is a top view of the concrete crack measuring device described in this utility model;

[0034] Figure 4 This is a schematic diagram of the internal structure of the fixing mechanism in this utility model;

[0035] Figure 5 for Figure 2 A magnified view of a portion of point A in the middle.

[0036] The components include: 1. Crack Defect Comprehensive Tester; 2. Planar Transducer; 3. Crack to be Tested; 4. First Clamping Plate; 5. Second Clamping Plate; 6. Third Clamping Plate; 7. Fourth Clamping Plate; 8. Center Positioning Plate; 9. Positioning Strip; 10. Slide Rail; 11. Measuring Ruler; 12. First Positioning Mechanism; 13. Second Positioning Mechanism; 14. Fixing Mechanism; 15. First Positioning Rod; 16. Second Positioning Rod; 17. Third Positioning Rod; 18. Fourth Positioning Rod; 19. First Fixing Block; 20. Second Fixing Block; 21. Third Fixing Block; 22. Fourth Fixing Block; 23. Triangular Prism Slot; 1401. Limiting Plate; 1402. First Fixing Stud; 1403. Second Fixing Stud; 1404. Third Fixing Stud; 1405. Top Plate. Detailed Implementation

[0037] To make the technical problems, technical solutions, and beneficial effects solved by this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0038] As attached Figure 1-5 As shown, this utility model provides a concrete crack measuring device, including a crack defect comprehensive tester 1, two planar transducers 2, a first set of clamping plates, a second set of clamping plates, a central positioning plate 8, a positioning plate 9, two slide rails 10, a measuring ruler 11, a first positioning mechanism 12, a second positioning mechanism 13, two fixing mechanisms 14, a first positioning plate 15, a second positioning plate 16, a third positioning plate 17, a fourth positioning plate 18, a first fixing block 19, a second fixing block 20, a third fixing block 21, and a fourth fixing block 22.

[0039] The crack defect comprehensive tester 1 is connected to both planar transducers 2 via connecting lines; wherein, the crack defect comprehensive tester 1 is an HC-F800 concrete crack defect comprehensive tester.

[0040] The central positioning plate 8 is vertically arranged, and positioning strips 9 are arranged around the central positioning plate 8; wherein, the positioning strips 9 are arranged along the thickness center line of the central positioning plate 8; in use, the central positioning plate 8 is vertically arranged above the crack 3 to be tested, and the positioning strips 9 are aligned with the crack 3 to be tested.

[0041] Two slide rails 10 are symmetrically arranged on both sides of the central positioning plate 8; wherein, both slide rails 10 are horizontally arranged and their center lines coincide; one end of each slide rail 10 is fixed perpendicularly to the surface of the central positioning plate 8, and the other end of each slide rail 10 extends horizontally away from the central positioning plate 8; a measuring scale mounting hole is provided in the center of the central positioning plate 8, and the measuring scale 11 is horizontally inserted into the measuring scale mounting hole so that the measuring scale 11 horizontally passes through the central positioning plate 8; wherein, the measuring scale 11 slides in contact with the inner wall of the measuring scale mounting hole so that the measuring scale 11 can be separated from the central positioning plate 8, thereby facilitating the replacement of the measuring scale 11.

[0042] One end of the measuring ruler 11 is horizontally embedded inside the first slide rail, and the other end of the measuring ruler 11 is horizontally embedded inside the second slide rail. Specifically, a measuring ruler mounting groove is formed on the upper surface of the slide rail 10, and the measuring ruler mounting groove is arranged along the axial direction of the slide rail 10. The top end of the measuring ruler mounting groove is connected to the top surface of the slide rail 10, and the bottom end of the measuring ruler mounting groove extends towards the bottom surface of the slide rail 10. The measuring ruler 11 is fitted in the measuring ruler mounting groove, and a scale is provided on the upper surface of the measuring ruler 11 to indicate the positioning positions of the first positioning mechanism 12 and the second positioning mechanism 13. Preferably, the inner wall of the measuring ruler mounting groove is coated with a fluorescent agent, and the fluorescent agent is placed near the upper surface of the measuring ruler 11 to ensure that the measuring ruler 11 can be read normally when the light is insufficient.

[0043] The first positioning mechanism 12 is slidably mounted on the first slide rail, and the first positioning mechanism 12 can slide along the first slide rail in a direction away from or towards the central positioning plate 8; the second positioning mechanism 13 is slidably mounted on the second slide rail, and the second positioning mechanism 13 can slide along the second slide rail in a direction away from or towards the central positioning plate 8; the first set of clamping plates is disposed on the side of the first positioning mechanism 12, and the first planar transducer is mounted on the first set of clamping plates; the second set of clamping plates is disposed on the side of the second positioning mechanism 13, and the second planar transducer is mounted on the second set of clamping plates.

[0044] The first set of clamping plates includes a first clamping plate 4 and a second clamping plate 5. The first clamping plate 4 is horizontally disposed on the first side of the first positioning mechanism 12, and the second clamping plate 5 is horizontally disposed on the second side of the first positioning mechanism 12. The first clamping plate 4 and the second clamping plate 5 are symmetrical about the center line of the first slide rail. One end of the first clamping plate 4 is fixed to the first side of the first positioning mechanism 12 by bolts, and the other end of the first clamping plate 4 extends horizontally away from the first positioning mechanism 12. One end of the second clamping plate 5 is fixed to the second side of the first positioning mechanism 12 by bolts, and the other end of the second clamping plate 5 extends horizontally away from the first positioning mechanism 12.

[0045] The second set of clamping plates includes a third clamping plate 6 and a fourth clamping plate 7. The third clamping plate 6 is horizontally disposed on the first side of the second positioning mechanism 13, and the fourth clamping plate 7 is horizontally disposed on the second side of the second positioning mechanism 13. The third clamping plate 6 and the fourth clamping plate 7 are symmetrical about the center line of the second slide rail. One end of the third clamping plate 6 is fixed to the first side of the second positioning mechanism 13 by bolts, and the other end of the third clamping plate 6 extends horizontally away from the second positioning mechanism 13. One end of the fourth clamping plate 7 is fixed to the second side of the second positioning mechanism 13 by bolts, and the other end of the fourth clamping plate 7 extends horizontally away from the second positioning mechanism 13.

[0046] The first card plate 4, the second card plate 5, the third card plate 6, and the fourth card plate 7 are all rectangular flat plates, each with a central circular hole at its center. The planar transducer 2 is vertically and concentrically inserted into the central circular hole. The center of the central circular hole on the first card plate 4, the center of the central circular hole on the second card plate 5, and the first end face of the first positioning mechanism 12 are located in the same vertical plane. The first end face of the first positioning mechanism 12 is the end face of the first positioning mechanism 12 closest to the central positioning plate 8. The center of the central circular hole on the third card plate 6, the center of the central circular hole on the fourth card plate 7, and the first end face of the second positioning mechanism 13 are located in the same vertical plane. The first end face of the second positioning mechanism 13 is the end face of the second positioning mechanism 13 closest to the central positioning plate 8.

[0047] The two fixing mechanisms 14 are respectively disposed at the ends of the two slide rails 10 and are both disposed away from the central positioning plate 8; wherein, the fixing mechanism 14 is connected to the first positioning mechanism 12 or the second positioning mechanism 13 through a positioning rod, so as to realize the positioning and fixing of the first positioning mechanism 12 or the second positioning mechanism 13.

[0048] Specifically, the first fixing mechanism is installed on the first slide rail and located at the first end of the measuring ruler 11; the second fixing mechanism is installed on the second slide rail and located at the second end of the measuring ruler 11; wherein, the two fixing mechanisms 14 have the same structure, each including a limiting plate 1401, a first fixing stud 1402, a second fixing stud 1403, a third fixing stud 1404 and a top plate 1405.

[0049] The limiting plate 1401 is vertically disposed at the end of the measuring ruler 11 and is sleeved on the slide rail 10; wherein, the limiting plate 1401 in at least one fixing mechanism 14 is slidably connected to the corresponding slide rail 10 so that at least one fixing mechanism 14 can be removed from the slide rail 10, and the measuring ruler 11 can be pulled out from the slide rail 10 for replacement; the first positioning rod 15 or the third positioning rod 17 is slidably inserted through the first side of the limiting plate 1401, and the second positioning rod 16 or the fourth positioning rod 18 is slidably inserted through the second side of the limiting plate 1401.

[0050] The first end of the limiting plate 1401 is provided with a first threaded hole, and the second end of the limiting plate 1401 is provided with a second threaded hole; wherein, the first threaded hole and the second threaded hole are both straight threaded holes, the first end of the straight threaded hole is in communication with the surface of the first end or the second end of the limiting plate 1401, and the second end of the straight threaded hole extends toward the center of the limiting plate 1401.

[0051] The first fixing stud 1402 is fitted into the first threaded hole, and the screw-in end of the first fixing stud 1402 is tightly abutted against the side of the first positioning rod 15 or the third positioning rod 17; the second fixing stud 1403 is fitted into the second threaded hole, and the screw-in end of the second fixing stud 1403 is tightly connected to the side of the second positioning rod 16 or the fourth positioning rod 18.

[0052] The limiting plate 1401 has a threaded through hole at its center. One end of the threaded through hole communicates with the first surface of the limiting plate 1401, and the other end communicates with the second surface of the limiting plate 1401. The third fixing stud 1404 passes through the threaded through hole. The top plate 1405 is installed at the screw-in end of the third fixing stud 1404. One side of the top plate 1405 is fixed to the screw-in end of the third fixing stud 1404, and the other side of the top plate 1405 is pressed against the end of the measuring ruler 11.

[0053] The first positioning rod 15 and the second positioning rod 16 are parallel to each other and symmetrically arranged on both sides of the first slide rail; wherein, the first end of the first positioning rod 15 is connected to the first side of the first positioning mechanism 12 through the first fixing block 19, and the second end of the first positioning rod 15 slides through the first side of the limiting plate in the first fixing mechanism, and the second end of the first positioning rod 15 can be locked or separated from the first side of the first fixing mechanism; the first end of the second positioning rod 16 is connected to the second side of the first positioning mechanism 12 through the second fixing block 20, and the second end of the second positioning rod 16 slides through the second side of the limiting plate in the first fixing mechanism, and the second end of the second positioning rod 16 can be locked or separated from the second side of the first fixing mechanism.

[0054] The third positioning rod 17 and the fourth positioning rod 18 are parallel to each other and symmetrically arranged on both sides of the second slide rail. The first end of the third positioning rod 17 is connected to the first side of the second positioning mechanism 13 through the third fixing block 21, and the second end of the third positioning rod 17 slides through the first side of the limiting plate in the second fixing mechanism. The second end of the third positioning rod 17 can be locked or separated from the first side of the second fixing mechanism. The first end of the fourth positioning rod 18 is connected to the second side of the second positioning mechanism 13 through the fourth fixing block 22, and the second end of the fourth positioning rod 18 slides through the second side of the limiting plate in the second fixing mechanism. The second end of the fourth positioning rod 18 can be locked or separated from the second side of the second fixing mechanism.

[0055] The first positioning rod 15, the second positioning rod 16, the third positioning rod 17, and the fourth positioning rod 18 have the same structure and are all horizontal rods. Each horizontal rod is connected to a corresponding positioning mechanism via a fixing block, and the horizontal rod is parallel to the corresponding slide rail. Several triangular prism-shaped slots 23 are evenly distributed on the sidewall of each horizontal rod, and these slots are evenly arranged along the axial direction of the horizontal rod and away from the slide rail 10. Both the first fixing stud 1402 and the second fixing stud 1403 are cylindrical studs, with the screw-in end of the cylindrical stud being a triangular prism end. This triangular prism end can engage with the several triangular prism slots 23, and the locking or separation of the positioning rod and the limiting plate is achieved by screwing in or out of the first fixing stud 1402 or the second fixing stud 1403.

[0056] Design and working principle:

[0057] In use, the concrete crack measuring device of this utility model connects the crack defect comprehensive tester 1 to two planar transducers 2 via connecting lines. The two planar transducers 2 are placed at equal distances on both sides of the crack 3 to be measured, and the crack depth measurement begins. The first planar transducer is connected to the first positioning mechanism 12 via the first clamping plate 4 or the second clamping plate 5, and the second planar transducer is connected to the second positioning mechanism 13 via the third clamping plate 6 or the fourth clamping plate 7.

[0058] A central positioning plate 8 is positioned at the center of the measuring device. Slide rails 10 are fixedly connected to both sides of the central positioning plate 8. A first positioning mechanism 12 and a second positioning mechanism 13 are slidably connected to the two slide rails 10, respectively. The two sides of the first positioning mechanism 12 are connected to the first clamping plate 4 and the second clamping plate 5 by bolts, respectively. The two sides of the second positioning mechanism 13 are connected to the third clamping plate 6 and the fourth clamping plate 7 by bolts, respectively. A measuring ruler 11 is horizontally installed through the central positioning plate 8 and is located inside the two slide rails 10. When measuring the crack depth, the first positioning mechanism 12 and the second positioning mechanism 13 slide along the two slide rails at a set distance away from or towards the sides of the central positioning plate 8 according to the measuring ruler 11, while simultaneously driving the first clamping plate 4, the second clamping plate 5, the third clamping plate 6, and the fourth clamping plate 7 to slide to the preset position.

[0059] The planar transducer 2 is placed in the central circular hole of the first clamping plate 4, the fourth clamping plate 7, or the second clamping plate 5 and the third clamping plate 6 to measure the depth of the crack 3 to be measured. The center of the central circular hole on the first clamping plate 4, the center of the central circular hole on the second clamping plate 5, and the end face of the first positioning mechanism 12 near the central positioning plate 8 are located in the same vertical plane. The center of the central circular hole on the third clamping plate 6, the center of the central circular hole on the fourth clamping plate 7, and the end face of the second positioning mechanism 13 near the central positioning plate 8 are also located in the same vertical plane. During positioning, the first positioning mechanism 12 and the second positioning mechanism 13 are positioned close to each other. The end face of the near-center positioning plate 8 is aligned with the preset scale line on the measuring ruler 11, thereby ensuring that the center of the planar transducer 2 is aligned with the corresponding scale line of the measuring ruler 11. Secondly, the planar transducer 2 is placed in the central circular hole on the first clamping plate 4, the second clamping plate 5, the third clamping plate 6, and the fourth clamping plate 7, which can effectively limit the planar transducer 2, ensuring its stability during the detection process. The operation is simple and ensures the accuracy of crack depth detection. At the same time, the center positioning plate is provided with a positioning strip 9. During crack detection, the center of the positioning strip 9 should be aligned with the simulated crack 3, which further improves the accuracy of the detection results.

[0060] The first positioning mechanism 12 is fixedly connected to the two sides by a first fixing block 19 and a second fixing block 20. The second positioning mechanism 13 is fixedly connected to the two sides by a third fixing block 21 and a fourth fixing block 22. The first fixing block 19 and the second fixing block 20 are respectively fixedly connected to the first positioning rod 15 and the second positioning rod 16 on the side away from the central positioning plate 8. The third fixing block 21 and the fourth fixing block 22 are respectively fixed to the third positioning rod 17 and the fourth positioning rod 18 on the side away from the central positioning plate 8. The other ends of the first positioning rod 15, the second positioning rod 16, the third positioning rod 17 and the fourth positioning rod 18 are respectively connected to the fixing mechanism 14. The first positioning rod 15, the second positioning rod 16, the third positioning rod 17 and the fourth positioning rod 18 are provided with a triangular prism groove 23 on the side away from the slide rail 10.

[0061] One positioning mechanism 14 is fixedly connected to one slide rail 10, and the other positioning mechanism 14 is slidably connected to the other slide rail 10. When the first positioning mechanism 12 and the second positioning mechanism 13 slide along the two slide rails 10 to both sides according to the measuring ruler 11, the first fixing block 19 and the second fixing block 20 on both sides of the first positioning mechanism 12, and the third fixing block 21 and the fourth fixing block 22 on both sides of the second fixing mechanism 13, drive the first positioning rod 15, the second positioning rod 16, the third positioning rod 17 and the fourth positioning rod 18 to move away from the central positioning plate 8. 3. When the set positions are reached, the first fixing stud 1402 and the second fixing stud 1403 in the two fixing mechanisms 14 are twisted until the triangular prism ends of the first fixing stud 1402 and the second fixing stud 1403 near the inside of the limiting plate 1401 are tightly fitted with the triangular prism grooves 23 on the first positioning rod 15, the second positioning rod 16, the third positioning rod 17 and the fourth positioning rod 18, thereby fixing the first positioning rod 15, the second positioning rod 16, the third positioning rod 17 and the fourth positioning rod 18, and then the first positioning mechanism 12 and the second positioning mechanism 13 are kept in the corresponding positions.

[0062] Simultaneously, when resetting the first positioning mechanism 12 and the second positioning mechanism 13, the first fixing stud 1402 and the second fixing stud 1403 can be twisted in the opposite direction to move them away from the triangular prism groove 23, thereby making the first positioning rod 15, the second positioning rod 16, the third positioning rod 17 and the fourth positioning rod 18 movable, and thus resetting the first positioning mechanism 12 and the second positioning mechanism 13; the limiting plate 1401 and the central positioning plate in the two fixing mechanisms 14 form a limit to the sliding of the first positioning mechanism 12 and the second positioning mechanism 13 along the slide rail 10; by setting the third fixing stud 1404 on both sides of the limiting plate 1401 away from the central positioning plate 8, and setting the top plate 1405 at the end of the third fixing stud 1404 near the central positioning plate 8, by twisting the third fixing stud 1404 to drive the top plate 1405 to move towards the central positioning plate 8, until the top plate 1405 is in close contact with the end of the measuring ruler 11, thereby achieving the function of fixing the measuring ruler 11.

[0063] The first positioning mechanism 12 is bolted to the first clamping plate 4 and the second clamping plate 5, and the second positioning mechanism 13 is bolted to the third clamping plate 6 and the fourth clamping plate 7. One of the fixing mechanisms is slidably connected to the slide rail. When the third fixing stud 1404 moves away from the measuring scale 11, the fixing mechanism can slide out of the slide rail 10, so that the measuring scale 11 can slide out of the slide rail 10 from that side, realizing convenient disassembly and assembly of the device, so as to facilitate the replacement of the measuring scale 11. At the same time, the measuring scale 11 is located inside the slide rail 10, which can effectively prevent the first positioning mechanism 12 and the second positioning mechanism 13 from damaging the scale lines on the measuring scale 11 when sliding. The contact part between the slide rail 10 and the measuring scale 11 is coated with fluorescent agent, which can ensure that the measuring caliper can be used normally when the light is insufficient.

[0064] The concrete crack measuring device of this utility model adopts a positioning mechanism that slides along the slide rail to both sides to move the clamping plate. The planar transducer is placed in the circular hole of the clamping plate. This avoids the need for manual drawing of lines with a measuring ruler and hand-held planar transducer, making operation convenient and saving time. The positioning mechanism slides along the slide rail to both sides according to the scale of the measuring ruler. The side of the positioning mechanism near the central positioning plate is aligned with the scale of the measuring ruler and the central circular hole on the clamping plate. This ensures that the center of the planar transducer is aligned with the scale of the measuring ruler, and the circular hole of the clamping plate can limit the planar transducer, which can achieve accurate detection and reduce human error. At the same time, it has the advantages of easy disassembly and assembly and easy replacement of the measuring ruler.

[0065] The concrete crack measuring device described in this utility model can achieve precise positioning and stable measurement of two planar transducers, thereby ensuring the accuracy of concrete crack depth detection data.

[0066] The above embodiments are merely one of the implementation methods to achieve the technical solution of this utility model. The scope of protection claimed by this utility model is not limited to this embodiment, but also includes any variations, substitutions and other implementation methods that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this utility model.

Claims

1. A concrete crack measuring device, characterized by, The utility model relates to a kind of crack defect comprehensive testing instruments, including crack defect comprehensive testing instrument (1), two plane transducers (2), center positioning plate (8), two slide rails (10), measuring scale (11), first positioning mechanism (12) and second positioning mechanism (13);The crack defect comprehensive testing instrument (1) is connected with two plane transducers (2);The center positioning plate (8) is vertically arranged, and two slide rails (10) are symmetrically arranged on the two sides of the center positioning plate (8);The measuring scale (11) is horizontally through the center positioning plate (8), and one end of the measuring scale (11) is horizontally embedded in the interior of first slide rail, and the other end of the measuring scale (11) is horizontally embedded in the interior of second slide rail;The first positioning mechanism (12) is slidably arranged on first slide rail, and the second positioning mechanism (13) is slidably arranged on second slide rail;The side of the first positioning mechanism (12) is provided with first set of clamping plates, and first plane transducer is installed on the first set of clamping plates;The side of the second positioning mechanism (13) is provided with second set of clamping plates, and second plane transducer is installed on the second set of clamping plates. The first set of clamping plates includes first clamping plate (4) and second clamping plate (5), and the first clamping plate (4) is horizontally arranged on the first side of the first positioning mechanism (12), and the second clamping plate (5) is horizontally arranged on the second side of the first positioning mechanism (12); The second set of clamping plates includes third clamping plate (6) and fourth clamping plate (7), and the third clamping plate (6) is horizontally arranged on the first side of the second positioning mechanism (13), and the fourth clamping plate (7) is horizontally arranged on the second side of the second positioning mechanism (13); The first clamping plate (4), the second clamping plate (5), the third clamping plate (6) and the fourth clamping plate (7) are all rectangular plates, and a center circular hole is formed in the center of the rectangular plate, and the plane transducer (2) is vertically and concentrically inserted into the center circular hole.

2. A concrete crack measuring device according to claim 1, wherein, The center of the center circular hole on the first clamping plate (4), the center of the center circular hole on the second clamping plate (5) and the first end surface of the first positioning mechanism (12) are located in the same vertical plane, and the first end surface of the first positioning mechanism (12) is the end surface of the first positioning mechanism (12) close to the center positioning plate (8). The center of the center circular hole on the third clamping plate (6), the center of the center circular hole on the fourth clamping plate (7) and the first end surface of the second positioning mechanism (13) are located in the same vertical plane, and the first end surface of the second positioning mechanism (13) is the end surface of the second positioning mechanism (13) close to the center positioning plate (8). The center positioning plate (8) is provided with positioning strips (9) around, and the positioning strips (9) are arranged along the thickness center line of the center positioning plate (8), and the positioning strips (9) are used for aligning with the crack (3) to be measured.

3. A concrete crack measuring device according to claim 2, wherein, ​ 4. The concrete crack measuring device of claim 2, wherein, ​ 5. The concrete crack measuring device of claim 1, wherein, ​ 6. The concrete crack measuring device of claim 1, wherein, Further comprising two fixing mechanisms (14), a first positioning rod (15), a second positioning rod (16), a third positioning rod (17) and a fourth positioning rod (18); the first fixing mechanism is installed on the first slide rail and located at the first end of the measuring scale (11); the second fixing mechanism is installed on the second slide rail and located at the second end of the measuring scale (11); The first positioning rod (15) and the second positioning rod (16) are parallel to each other and symmetrically arranged on both sides of the first slide rail; wherein the first end of the first positioning rod (15) is connected with the first side of the first positioning mechanism (12), the second end of the first positioning rod (15) is slidably inserted into the first side of the first fixing mechanism, and the second end of the first positioning rod (15) can be locked or separated from the first side of the first fixing mechanism; the first end of the second positioning rod (16) is connected with the second side of the first positioning mechanism (12), the second end of the second positioning rod (16) is slidably inserted into the second side of the first fixing mechanism, and the second end of the second positioning rod (16) can be locked or separated from the second side of the first fixing mechanism; The third positioning rod (17) and the fourth positioning rod (18) are parallel to each other and symmetrically arranged on both sides of the second slide rail; wherein the first end of the third positioning rod (17) is connected with the first side of the second positioning mechanism (13), the second end of the third positioning rod (17) is slidably inserted into the first side of the second fixing mechanism, and the second end of the third positioning rod (17) can be locked or separated from the first side of the second fixing mechanism; the first end of the fourth positioning rod (18) is connected with the second side of the second positioning mechanism (13), the second end of the fourth positioning rod (18) is slidably inserted into the second side of the second fixing mechanism, and the second end of the fourth positioning rod (18) can be locked or separated from the second side of the second fixing mechanism.

7. A concrete crack measuring device according to claim 6, wherein, The fixing mechanism (14) comprises a limiting plate (1401), a first fixing stud (1402) and a second fixing stud (1403); The limiting plate (1401) is vertically arranged at the end of the measuring scale (11) and sleeved on the slide rail (10); the first positioning rod (15) or the third positioning rod (17) is slidably inserted into the first side of the limiting plate (1401), and the second positioning rod (16) or the fourth positioning rod (18) is slidably inserted into the second side of the limiting plate (1401); The first end of the limiting plate (1401) is provided with a first threaded hole, the first fixing stud (1402) is fitted and installed in the first threaded hole, and the screw-in end of the first fixing stud (1402) is in abutting arrangement with the side surface of the first positioning rod (15) or the third positioning rod (17); The second end of the limiting plate (1401) is provided with a second threaded hole, and the second fixing stud (1403) is fitted in the second threaded hole, and the screw-in end of the second fixing stud (1403) is connected to the side surface of the second positioning rod (16) or the fourth positioning rod (18).

8. A concrete crack measuring device according to claim 7, wherein, The first positioning rod (15), the second positioning rod (16), the third positioning rod (17) and the fourth positioning rod (18) are the same structure, all of which are horizontal rods; wherein the side wall of the horizontal rod is uniformly provided with a plurality of triangular column clamping grooves (23), and a plurality of triangular column clamping grooves (23) are uniformly arranged along the axis direction of the horizontal rod, and are arranged away from the side of the slide rail (10); The first fixing stud (1402) and the second fixing stud (1403) are both cylindrical studs, and the screw-in end of the cylindrical stud is provided with a triangular column end; wherein the triangular column end is connected to a plurality of triangular column clamping grooves (23).

9. A concrete crack measuring device according to claim 7, wherein, The fixing mechanism (14) further comprises a third fixing stud (1404) and a top disc (1405); the center of the plate surface of the limiting plate (1401) is provided with a threaded through hole, and the third fixing stud (1404) is arranged in the threaded through hole; the top disc (1405) is arranged at the screw-in end of the third fixing stud (1404); wherein one side of the top disc (1405) is fixed with the screw-in end of the third fixing stud (1404), and the other side of the top disc (1405) is connected to the end of the measuring scale (11).

10. The concrete crack measuring device of claim 7, wherein, At least one limiting plate (1401) in the fixing mechanism (14) is connected to the corresponding slide rail (10) in sliding mode.

Images