Bridge crack detection and measurement device

Abstract

The utility model discloses a bridge crack detecting and measuring device, which comprises a vibrating wire type crack measuring meter and two mounting seats, a measuring rod end and a cylinder end of the vibrating wire type crack measuring meter are fixedly connected with hoops through connecting seats, each mounting seat comprises a bottom plate, and the bottom plate is provided with a through hole for mounting an expansion screw; during installation, the two bottom plates are fixed at an installation point position through expansion bolts or nail-free glue, and then the distance between the ball seats and the bottom plates is adjusted through the height adjusting mechanism, so that the connecting line of spherical points of the two ball seats is parallel to the outer surface of a bridge and is perpendicular to a crack; finally, the hoops at the two ends of the vibrating wire type joint meter are fixedly installed on the corresponding ball seats, the parallelism of the vibrating wire type joint meter and the outer surface of the bridge and the perpendicularity between the vibrating wire type joint meter and the crack can be guaranteed, operation is easy and convenient, the outer surfaces of the two sides of the crack do not need to be treated, correct installation of the vibrating wire type joint meter can be met, and the use effect is good.

Description

Technical Field

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

[0002] After a period of use, cracks may appear in the concrete structure of a bridge. Regularly inspecting bridge cracks can help identify potential safety hazards in a timely manner, prevent bridge collapses and other safety accidents, and ensure the safety of pedestrians and vehicles. At the same time, monitoring bridge cracks can assess the fatigue condition, load-bearing capacity and stability of the bridge structure, providing a basis for maintenance and repair and extending the service life of the bridge.

[0003] Currently, vibrating wire crack gauges or similar gauges are commonly used for long-term monitoring of cracks in areas of bridges that are difficult for personnel to access. The working principle of the vibrating wire crack gauge is based on the fact that when the structure being measured undergoes displacement, stress is transmitted to the vibrating wire through the front and rear end supports, causing a change in the stress and thus altering the vibration frequency of the wire. An electromagnetic coil excites the vibrating wire and measures its vibration frequency. The frequency signal is transmitted to a data acquisition device via an observation cable, allowing the displacement of the structure to be measured.

[0004] When installing a vibrating wire crack gauge, it must be parallel to the surface of the structure being measured and perpendicular to the crack being measured. However, most commonly used vibrating wire crack gauges have simple mounting bases at both ends with limited adjustment capabilities. When there is a height difference between the surfaces on both sides of the crack being measured, or when the surfaces on both sides of the crack being measured are uneven, the surface of the structure being measured often needs to be treated before the vibrating wire crack gauge can be installed correctly. This makes it inconvenient to use and needs improvement. Utility Model Content

[0005] The purpose of this invention is to provide a bridge crack detection and measurement device to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A bridge crack detection and measurement device includes a vibrating wire crack gauge and two mounting bases. The measuring rod end and the cylinder end of the vibrating wire crack gauge are fixedly connected to a clamp via a connecting base. The mounting base includes a base plate with through holes for installing expansion bolts. The top of the base plate is connected to a ball seat via a height adjustment mechanism. The clamp is fitted onto the corresponding ball seat.

[0008] As a further embodiment of this utility model: the height adjustment mechanism includes a screw fixedly installed on the top of the base plate, a ball seat slidably sleeved on the screw, a nut fitted on the outer wall of the screw, the ball seat fixedly connected to the nut, and a plurality of first threaded holes for installing set screws on the outer wall of the nut.

[0009] As a further embodiment of this utility model: the threaded end of the set screw is provided with a guide rod through a blind hole, and a pressure block is fixedly connected to one end of the guide rod outside the blind hole, and a rubber block is fixedly connected to the outer wall of the pressure block.

[0010] As a further embodiment of this utility model: the clamp includes two C-shaped strips, one of which is fixedly connected to the vibrating wire type joint gauge via a connecting seat. The inner side of the C-shaped strip is provided with an arc-shaped groove that matches the outer diameter of the ball seat. The two C-shaped strips are detachably connected to each other.

[0011] As a further embodiment of this utility model: connecting blocks are fixedly connected to both ends of the outer wall of the C-shaped strip, and screws are passed through the connecting blocks at both ends of one C-shaped strip, while a second threaded hole adapted to the screw is provided through the connecting blocks at both ends of the other C-shaped strip.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] During installation, this invention involves selecting two installation points on the outer surface of the bridge based on the crack's direction. Expansion bolts or adhesive are then used to fix the two base plates at these points. The distance between the ball seats and the base plates is adjusted using a height adjustment mechanism to ensure that the line connecting the spherical points of the two ball seats is parallel to the outer surface of the bridge and perpendicular to the crack. Finally, the clamps at both ends of the vibrating wire crack gauge are fixed onto the corresponding ball seats. This ensures the parallelism between the vibrating wire crack gauge and the outer surface of the bridge, as well as its perpendicularity to the crack. The operation is simple and convenient, requiring no treatment of the outer surfaces on both sides of the crack to ensure proper installation of the vibrating wire crack gauge, resulting in excellent performance. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of a bridge crack detection and measurement device.

[0015] Figure 2 for Figure 1 Enlarged view of point A in the middle.

[0016] Figure 3 This is a top view schematic diagram of the clamp structure in a bridge crack detection and measurement device.

[0017] Among them, the vibrating wire type joint gauge 1, clamp 2, base plate 3, expansion screw 4, screw 5, ball seat 6, nut 7, first threaded hole 8, set screw 9, blind hole 10, guide rod 11, pressure block 12, rubber block 13, C-shaped strip 14, arc groove 15, connecting seat 16, connecting block 17, and screw 18. 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] Please see Figures 1-3 In this embodiment of the utility model, a bridge crack detection and measurement device includes a vibrating wire crack gauge 1 and two mounting bases. The measuring rod end and the cylinder end of the vibrating wire crack gauge 1 are both fixedly connected to a clamp 2 through a connecting base 16. The mounting base includes a base plate 3, on which a through hole for installing an expansion screw 4 is opened. The top of the base plate 3 is connected to a ball seat 6 through a height adjustment mechanism, and the clamp 2 is fitted onto the corresponding ball seat 6.

[0020] By adopting the above-mentioned solution, during installation, two installation points are selected on the outer surface of the bridge according to the trend of the crack. Then, expansion bolts 4 or nail-free adhesive are used to fix the two base plates 3 at the installation points. After that, the distance between the ball seat 6 and the base plate 3 is adjusted by the height adjustment mechanism so that the line connecting the spherical points of the two ball seats 6 is parallel to the outer surface of the bridge and perpendicular to the crack. Finally, the clamps 2 at both ends of the vibrating wire crack gauge 1 are fixedly installed on the corresponding ball seats 6. This ensures the parallelism between the vibrating wire crack gauge 1 and the outer surface of the bridge, as well as the perpendicularity between it and the crack. The operation is simple and convenient, and no treatment is required on the outer surface on both sides of the crack to ensure the correct installation of the vibrating wire crack gauge 1. The effect of use is good.

[0021] Specific combination Figure 1 and Figure 2 In one embodiment of the present invention, the height adjustment mechanism includes a screw 5 fixedly installed on the top of the base plate 3, a ball seat 6 slidably sleeved on the screw 5, a nut 7 fitted on the outer wall of the screw 5, the ball seat 6 and the nut 7 being fixedly connected, and the outer wall of the nut 7 having a plurality of first threaded holes 8 for installing set screws 9.

[0022] The distance between the ball seat 6 and the base plate 3 can be adjusted by rotating the ball seat 6 and nut 7 on the screw 5. The nut 7 and ball seat 6 can be fixed on the screw 5 by tightening the set screw 9.

[0023] Specific combination Figure 2 In one embodiment of the present invention, the threaded end of the set screw 9 is provided with a guide rod 11 through a blind hole 10, and a pressure block 12 is fixedly connected to one end of the guide rod 11 outside the blind hole 10. A rubber block 13 is fixedly connected to the outer wall of the pressure block 12.

[0024] By setting the rubber block 13, when the set screw 9 is tightened, the rubber block 13 can be pressed onto the thread of the screw 5 to fix the nut 7 and ball seat 6 on the screw 5, and to avoid damage to the thread of the screw 5.

[0025] Specific combination Figure 1-3 In one embodiment of the present invention, the clamp 2 includes two C-shaped strips 14. One of the C-shaped strips 14 is fixedly connected to the vibrating wire type joint gauge 1 through a connecting seat 16. The inner side of the C-shaped strip 14 is provided with an arc-shaped groove 15 that is adapted to the outer diameter of the ball seat 6. The two C-shaped strips 14 are detachably connected to each other.

[0026] Furthermore, connecting blocks 17 are fixedly connected to both ends of the outer wall of the C-shaped strip 14. Screws 18 are passed through the connecting blocks 17 at both ends of one C-shaped strip 14, and a second threaded hole adapted to the screws 18 is provided through the connecting blocks 17 at both ends of the other C-shaped strip 14.

[0027] Before tightening screw 18, the clamp 2 composed of two C-shaped strips 14 can rotate on the ball seat 6, which facilitates the adjustment of the installation position of the vibrating wire joint gauge 1. After tightening screw 18, the two C-shaped strips 14 can be clamped on the ball seat 6 to fix the vibrating wire joint gauge 1 to the two mounting seats.

[0028] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A bridge crack detection and measurement device, characterized in that: The vibrating wire type joint gauge (1) and two mounting bases are provided. The measuring rod end and the cylinder end of the vibrating wire type joint gauge (1) are fixedly connected to the clamp (2) through the connecting base (16). The mounting base includes a base plate (3). The base plate (3) has through holes for installing expansion screws (4). The top of the base plate (3) is connected to a ball seat (6) through a height adjustment mechanism. The clamp (2) fits into the corresponding ball seat (6).

2. The bridge crack detection and measurement device according to claim 1, characterized in that: The height adjustment mechanism includes a screw (5) fixedly installed on the top of the base plate (3), a ball seat (6) slidably sleeved on the screw (5), a nut (7) fitted on the outer wall of the screw (5), the ball seat (6) and the nut (7) being fixedly connected, and the outer wall of the nut (7) having a plurality of first threaded holes (8) for installing set screws (9).

3. The bridge crack detection and measurement device according to claim 2, characterized in that: The threaded end of the set screw (9) is provided with a guide rod (11) through a blind hole (10). A pressure block (12) is fixedly connected to one end of the guide rod (11) outside the blind hole (10). A rubber block (13) is fixedly connected to the outer wall of the pressure block (12).

4. The bridge crack detection and measurement device according to claim 1, characterized in that: The clamp (2) includes two C-shaped strips (14). One of the C-shaped strips (14) is fixedly connected to the vibrating wire type joint gauge (1) through a connecting seat (16). The inner side of the C-shaped strip (14) is provided with an arc groove (15) that matches the outer diameter of the ball seat (6). The two C-shaped strips (14) are detachably connected to each other.

5. A bridge crack detection and measurement device according to claim 4, characterized in that: Connecting blocks (17) are fixedly connected to both ends of the outer wall of the C-shaped strip (14). Screws (18) are passed through the connecting blocks (17) at both ends of one C-shaped strip (14), and a second threaded hole adapted to the screws (18) is provided through the connecting blocks (17) at both ends of the other C-shaped strip (14).

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