A bridge expansion joint deformation monitoring device

Abstract

This utility model provides a bridge expansion joint deformation monitoring device, relating to the field of bridge monitoring technology. It includes a housing and a crack sensor. A mounting base is fixedly installed on the lower surface of the housing, and a mounting plate is provided on the lower surface of the mounting base. Mounting holes are opened on the surface of the mounting plate, and a cover is provided on the surface of the housing. This utility model allows for flexible adjustment of the installation position by rotating an adjusting rod, enabling the mounting plate to move within a moving groove via a moving block. This adapts to bridge expansion joints of different widths or structures, improving the versatility and convenience of equipment installation. Furthermore, through the design of clamping plates, tie rods, tension springs, and dampers, when the crack sensor is placed between the clamping plates, the elasticity of the tension springs and the dampers work together to tightly and stably clamp the sensor, reducing sensor swaying or displacement caused by bridge vibrations and other factors, thus ensuring the accuracy and stability of the monitoring data.

Description

Technical Field

[0001] This utility model relates to the field of bridge monitoring technology, and in particular to a bridge expansion joint deformation monitoring device. Background Technology

[0002] Bridge monitoring is a crucial means of monitoring the real-time operational status of bridge structures, detecting structural damage and potential safety hazards in advance, and ensuring the safe operation of bridges. Among the many components of a bridge, expansion joints directly bear the repeated effects of vehicle loads and environmental factors; their deformation is one of the key indicators reflecting the health of the bridge structure.

[0003] In existing technologies, such as the Chinese patent CN222013164U entitled "A Bridge Structure Health Monitoring Device," a crack sensor and a protective cloth cover installed outside the crack sensor are included. Positioning seats are fixed at both ends of the crack sensor. Each positioning seat consists of a horizontal plate and a vertical plate arranged in a folded pattern. Support columns are fixed to the lower surface of each of the two horizontal plates. The protective cloth cover is rolled up on both sides towards the crack sensor and secured with elastic bands. Both elastic bands are annular and fit around the two support columns. Tightening elastic bands are fixed to the other two sides of the protective cloth cover. The upper surface of each of the two vertical plates has horizontally formed slots. A cover is fixed to the side of each vertical plate that is close to the other, and both covers are annular and fit around both ends of the crack sensor. This invention can move the fixing point of the protective cloth cover to below the crack sensor, making it easier to avoid fine sand and other impurities falling into the expansion joint, reducing cleaning workload, and helping to reduce the maintenance cost of the crack sensor inside the bridge expansion joint.

[0004] Although this type of bridge monitoring equipment can conveniently avoid fine sand and other impurities falling into the expansion joints and reduce the amount of cleaning work, the equipment lacks installation flexibility. Its positioning seat structure is fixed and it is difficult to adapt to bridge expansion joints of different widths and structural forms. In actual installation, it may face problems such as installation difficulties or inaccurate installation positions, which in turn affects the monitoring effect. Utility Model Content

[0005] The purpose of this invention is to solve the problems of poor installation flexibility and fixed positioning seat structure in the existing technology, which makes it difficult to adapt to bridge expansion joints of different widths and structural forms. Therefore, this invention proposes a bridge expansion joint deformation monitoring device.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a bridge expansion joint deformation monitoring device, comprising a housing and a crack sensor, wherein a mounting base is fixedly installed on the lower surface of the housing, a mounting plate is provided on the lower surface of the mounting base, a mounting hole is opened on the surface of the mounting plate, a housing cover is provided on the surface of the housing, a movable block is fixedly connected to the surface of the mounting plate, a movable groove is opened on the side of the mounting base, an adjusting rod is rotatably connected inside the mounting base, a rotating head is fixedly installed at one end of the adjusting rod, a clamping plate is slidably connected to the inner side of the housing, a pull rod is fixedly installed on the side of the clamping plate, a tension spring is sleeved on the surface of the pull rod, a damper is fixedly installed on the inner side of the housing, a sliding block is fixedly connected to the side of the clamping plate, and a sliding groove is opened on the inner side of the housing.

[0007] Preferably, the moving block and the moving groove are slidably connected, and the adjusting rod and the moving block are threadedly connected.

[0008] Preferably, one end of the damper is fixedly connected to the side of the clamping plate, and the tie rod is slidably connected to the outer shell.

[0009] Preferably, one end of the tension spring is fixedly connected to the side of the clamping plate, and the other end of the tension spring is fixedly connected to the inner side of the outer shell.

[0010] Preferably, the side of the clamping plate is provided with a protective pad, the side of the crack sensor is fixedly connected with a protrusion, and the surface of the outer shell is provided with a groove.

[0011] Preferably, the protective pad is made of natural rubber, and the protrusion and the groove are slidably connected.

[0012] Compared with the prior art, the advantages and positive effects of this utility model are as follows: 1. In this utility model, the mounting plate can be moved within the moving slot by rotating the adjusting rod through the moving block, thereby achieving flexible adjustment of the installation position to adapt to bridge expansion joints of different widths or structures, improving the versatility and convenience of equipment installation. Furthermore, through the design of the clamping plate, tie rod, tension spring, and damper, when the crack sensor is placed between the clamping plates, the elasticity of the tension spring and the damper work together to make the clamping plate tightly and stably hold the sensor, reducing sensor shaking or displacement caused by factors such as bridge vibration, and ensuring the accuracy and stability of monitoring data.

[0013] 2. In this utility model, a protective pad made of natural rubber is provided on the side of the clamping plate, which can protect the sensor surface from being scratched when clamped, further improving the protection of the sensor. Through the sliding connection of the protrusion and the groove, the crack sensor can be accurately installed, ensuring the accuracy of the sensor installation position. Attached Figure Description

[0014] Figure 1 This utility model provides a three-dimensional structural schematic diagram of a bridge expansion joint deformation monitoring device; Figure 2 This utility model provides a top sectional view of a bridge expansion joint deformation monitoring device; Figure 3 This utility model provides a side sectional view of a bridge expansion joint deformation monitoring device; Figure 4 This utility model provides exploded diagrams of the clamping plate, tie rod, tension spring, and damper of a bridge expansion joint deformation monitoring device.

[0015] Legend: 1. Housing; 2. Crack sensor; 3. Mounting base; 4. Mounting plate; 5. Mounting hole; 6. Housing cover; 7. Moving block; 8. Moving groove; 9. Adjusting rod; 10. Rotating head; 11. Clamping plate; 12. Pull rod; 13. Tension spring; 14. Damper; 15. Sliding block; 16. Slide groove; 17. Protective pad; 18. Protrusion; 19. Groove. Detailed Implementation

[0016] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0017] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0018] Example 1: As Figures 1-4As shown, this utility model provides a technical solution: a bridge expansion joint deformation monitoring device, including a housing 1 and a crack sensor 2. A mounting base 3 is fixedly installed on the lower surface of the housing 1. A mounting plate 4 is provided on the lower surface of the mounting base 3. Mounting holes 5 are opened on the surface of the mounting plate 4. A housing cover 6 is provided on the surface of the housing 1. A movable block 7 is fixedly connected to the surface of the mounting plate 4. A movable groove 8 is opened on the side of the mounting base 3. An adjusting rod 9 is rotatably connected inside the mounting base 3. A rotating head 10 is fixedly installed at one end of the adjusting rod 9. A clamping plate 11 is slidably connected to the inner side of the housing 1. A pull rod 12 is fixedly installed on the side, and a tension spring 13 is sleeved on the surface of the pull rod 12. A damper 14 is fixedly installed on the inner side of the outer shell 1. A sliding block 15 is fixedly connected to the side of the clamping plate 11. A sliding groove 16 is opened on the inner side of the outer shell 1. The moving block 7 is slidably connected to the moving groove 8. The adjusting rod 9 is threadedly connected to the moving block 7. One end of the damper 14 is fixedly connected to the side of the clamping plate 11. The pull rod 12 is slidably connected to the outer shell 1. One end of the tension spring 13 is fixedly connected to the side of the clamping plate 11. The other end of the tension spring 13 is fixedly connected to the inner side of the outer shell 1.

[0019] In this embodiment, rotating the adjusting rod 9 can drive the mounting plate 4 to move within the moving groove 8 via the moving block 7, thereby achieving flexible adjustment of the installation position to adapt to bridge expansion joints of different widths or structures, improving the versatility and convenience of equipment installation. Furthermore, through the design of the clamping plate 11, the pull rod 12, the tension spring 13, and the damper 14, when the crack sensor 2 is placed between the clamping plates 11, the elasticity of the tension spring 13 and the damper 14 work together to make the clamping plate 11 tightly and stably clamp the sensor, reducing sensor shaking or displacement caused by factors such as bridge vibration, and ensuring the accuracy and stability of monitoring data.

[0020] Example 2: Figures 1-4 As shown, the side of the clamping plate 11 is provided with a protective pad 17, the side of the crack sensor 2 is fixedly connected with a protrusion 18, the surface of the outer shell 1 is provided with a groove 19, the protective pad 17 is made of natural rubber, and the protrusion 18 and the groove 19 are slidably connected.

[0021] In this embodiment, a protective pad 17 made of natural rubber is provided on the side of the clamping plate 11, which can protect the sensor surface from being scratched when clamped, further improving the protection of the sensor. The crack sensor 2 can be accurately installed through the sliding connection of the protrusion 18 and the groove 19, ensuring the accuracy of the sensor installation position.

[0022] The working principle of this embodiment is as follows: When installing the bridge expansion joint deformation monitoring device, the mounting base 3 is first connected to the bridge deck at the bridge expansion joint via the mounting plate 4 on its lower surface. The mounting holes 5 on the mounting plate 4 are used to fasten the device to the bridge deck with bolts. If an expansion joint of different width or structure is encountered, the adjusting rod 9 inside the mounting base 3 can be rotated. Since the adjusting rod 9 is threadedly connected to the moving block 7, and the moving block 7 is slidably connected to the moving groove 8 on the side of the mounting base 3, rotating the adjusting rod 9 will cause the moving block 7 to move the mounting plate 4 within the moving groove 8, thereby flexibly adjusting the position of the mounting base 3 and the entire device at the expansion joint until a suitable installation point is reached and the mounting plate 4 is fixed to the bridge deck. Then, the crack sensor 2 is installed by opening the cover 6 on the surface of the outer shell 1 and inserting the crack sensor. The device 2 aligns the protrusion 18 on its side with the groove 19 on the surface of the outer shell 1 and slides along the direction of the groove 19, allowing the sensor to slide accurately into the inner side of the outer shell 1. At this time, the elastic force of the tension spring 13 and the damping effect of the damper 14 work together to push the clamping plate 11 closer to the sensor and tightly clamp the crack sensor 2. In the daily operation of the bridge, if vibration occurs, the damper 14 can effectively buffer and reduce the sensor shaking or displacement caused by vibration, ensuring the stable operation of the crack sensor 2. At the same time, the protective pad 17 made of natural rubber on the side of the clamping plate 11 contacts the sensor surface to prevent the sensor surface from being scratched and to ensure the normal performance of the sensor. After the entire device is installed, it can monitor the crack changes of the bridge expansion joint in real time, providing data support for the health monitoring of the bridge structure.

[0023] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A bridge expansion joint deformation monitoring device, comprising a housing (1) and a crack sensor (2), characterized in that: A mounting base (3) is fixedly installed on the lower surface of the outer shell (1). A mounting plate (4) is provided on the lower surface of the mounting base (3). A mounting hole (5) is opened on the surface of the mounting plate (4). A shell cover (6) is provided on the surface of the outer shell (1). A moving block (7) is fixedly connected to the surface of the mounting plate (4). A moving groove (8) is opened on the side of the mounting base (3). An adjusting rod (9) is rotatably connected inside the mounting base (3). A rotating head (10) is fixedly installed at one end of the adjusting rod (9). A clamping plate (11) is slidably connected to the inner side of the outer shell (1). A pull rod (12) is fixedly installed on the side of the clamping plate (11). A tension spring (13) is sleeved on the surface of the pull rod (12). A damper (14) is fixedly installed on the inner side of the outer shell (1). A sliding block (15) is fixedly connected to the side of the clamping plate (11). A sliding groove (16) is opened on the inner side of the outer shell (1).

2. The bridge expansion joint deformation monitoring device according to claim 1, characterized in that: The movable block (7) is slidably connected to the movable groove (8), and the adjusting rod (9) is threadedly connected to the movable block (7).

3. The bridge expansion joint deformation monitoring device according to claim 1, characterized in that: One end of the damper (14) is fixedly connected to the side of the clamp (11), and the pull rod (12) is slidably connected to the outer shell (1).

4. The bridge expansion joint deformation monitoring device according to claim 1, characterized in that: One end of the tension spring (13) is fixedly connected to the side of the clamping plate (11), and the other end of the tension spring (13) is fixedly connected to the inside of the outer shell (1).

5. The bridge expansion joint deformation monitoring device according to claim 1, characterized in that: The side of the clamp (11) is provided with a protective pad (17), the side of the crack sensor (2) is fixedly connected with a protrusion (18), and the surface of the outer shell (1) is provided with a groove (19).

6. The bridge expansion joint deformation monitoring device according to claim 5, characterized in that: The protective pad (17) is made of natural rubber, and the protrusion (18) and the groove (19) are slidably connected.

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