A concrete crack measuring point arrangement device
Patent Information
- Application Number
- CN202522622041.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-10
- Publication Date
- 2026-11-03
- Estimated Expiration
- 2035-12-10
AI Technical Summary
In existing technologies, distributed fiber optic sensors are easily damaged by mechanical impact during the pouring of large-volume concrete. The installation method is unstable, resulting in a low sensor survival rate, creating monitoring blind spots, and making it difficult to achieve full-section crack early warning.
The concrete crack measuring point layout device includes a sensor body, mounting base, protective top cover and reinforced connection components. Through threaded connection, elastic locking clip and buffer pad structure, it ensures that the sensor does not loosen or get damaged during vibration, and provides a stable monitoring environment.
It improves the survival rate and monitoring accuracy of sensors, reduces monitoring blind spots, and achieves stability and data continuity for long-term online monitoring.
Smart Images
Figure CN224933488U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of monitoring devices for concrete structures of weirs, and in particular to a device for arranging measuring points for concrete cracks. Background Technology
[0002] In the monitoring of concrete structures within weirs in water conservancy projects, early identification and warning of internal cracks are core requirements for ensuring the safe operation of the project. Distributed fiber optic grating sensors, due to their advantages such as high measurement point density, high monitoring accuracy, and strong anti-interference capabilities, have become the core component for monitoring internal cracks in weir concrete. Their installation stability and adaptability directly determine the reliability of the monitoring data. However, current installation methods for distributed fiber optic sensors have significant technical limitations, making it difficult to meet the needs of large-volume concrete pouring and long-term monitoring. During large-volume concrete pouring, the mechanical impact and stress generated by vibration can easily cause fiber optic sensors to break or degrade in performance. Existing protection methods mostly use plastic sleeves with a single connection, which only provide basic insulation and cannot withstand the instantaneous impact force during vibration. This results in a sensor survival rate generally below 85%, and some areas become monitoring blind spots due to sensor failure, making it difficult to achieve full-section crack early warning. In view of the above reasons, this solution proposes a multi-stabilized installation device for the layout of concrete crack measuring points. Utility Model Content
[0003] The main purpose of this invention is to provide a concrete crack measuring point arrangement device to solve the problems in the prior art.
[0004] To achieve the above objectives, this utility model provides the following technical solution: A concrete crack measuring point arrangement device includes a sensor body for monitoring and collecting concrete crack data and a measuring point installation assembly for its arrangement and installation. The measuring point installation assembly includes an installation base and a protective top cover. The protective top cover is threadedly rotatably installed on the top of the installation base, and the sensor body is installed inside the installation base and a buffer pad is placed in the gap between the sensor body and the installation base. A reinforcing connection assembly is also provided between the mounting base and the protective top cover. The reinforcing connection assembly includes reinforcing plates that are fixedly connected to both sides of the upper surface of the protective top cover. An elastic locking head that is elastically set on the mounting base is fitted under the reinforcing plates.
[0005] As a further improvement of this utility model, the top of the protective cover is provided with an annular groove, the inner wall of the annular groove is provided with an installation groove, the bottom inner wall of the installation groove is connected with a reset spring, and the top of the reset spring is fixedly connected to the bottom of the elastic locking head.
[0006] As a further improvement of this utility model, an arc-shaped locking buckle is fixedly connected to the lower part of the reinforcing buckle, and the locking buckle is provided with a slot for fitting and engaging with the elastic locking buckle head.
[0007] As a further improvement of this utility model, a hand-held pinch block is fixedly connected at the top axis position of the protective top cover, and a transparent observation window is provided on the protective top cover. The bottom of the protective top cover is fixedly connected to a limiting block, and the lower surface of the limiting block is set to abut against the upper surface of the sensor body.
[0008] As a further improvement of this utility model, the connecting end of the sensor body passes through the mounting base, and the bottom of the mounting base is also provided with a threaded hole, in which a connecting bolt for connecting the extension rod is provided.
[0009] As a further improvement of this utility model, the bottom connection of the mounting base is also provided with a connecting clamp.
[0010] This utility model first achieves initial fixation of the protective top cover and mounting base through threaded rotation. Then, a secondary lock is formed by the snap-fit of the arc-shaped locking buckle plate below the reinforcing plate and the elastic locking head. At the same time, the return spring provides elastic support for the elastic locking head, ensuring a tight connection between the protective top cover and the mounting base. This effectively avoids component loosening or measuring point displacement caused by vibration during concrete construction, ensuring accurate monitoring position. The sensor body is installed inside the mounting base, and a buffer pad is provided at the gap between the two to absorb the impact of external vibration or shock on the sensor body, reducing damage to the sensor caused by collision or squeezing. Meanwhile, the limiting block at the bottom of the protective top cover abuts against the upper surface of the sensor body, which not only provides vertical limitation for the sensor body but also further buffers pressure through the flexible contact of the limiting block, reducing the risk of sensor performance degradation, ensuring the accuracy and continuity of crack data acquisition, and thus increasing the accuracy of concrete monitoring. This utility model also allows for adjustment of the device installation method according to different concrete crack monitoring locations through the setting of connecting clamps and detachable extension rods, adapting to the measurement point layout requirements under different working conditions. At the same time, the connection end of the sensor body is set through the mounting base, which facilitates the sensor to interface with external data receiving equipment, enabling signal transmission without disassembling the device, and adapting to long-term online monitoring scenarios. Attached Figure Description
[0011] Figure 1 This is a schematic diagram of the overall structure of a concrete crack measuring point arrangement device according to the present invention. Figure 2 for Figure 1 A schematic diagram of the structure viewed from below; Figure 3 This is a front view of the cross-sectional structure of this utility model; Figure 4 This is an exploded structural diagram of the present invention; Figure 5 This is a schematic diagram of the structure of the protective top cover in this utility model; Nomenclature (in order of first appearance): Sensor body 1, Measuring point mounting assembly 2, Mounting base 21, Mounting groove 210, Return spring 211, Elastic locking clip 212, Protective top cover 22, Connecting clamp 23, Extension rod 24, Connecting bolt 241, Reinforcing plate 25, Locking buckle 26, Bay opening 260, Buffer pad 3, Limiting block 4. Detailed Implementation
[0012] The technical solutions of 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 the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.
[0013] like Figures 1 to 5 As shown, this embodiment provides an example of a concrete crack measuring point arrangement device. This embodiment includes a sensor body 1 for concrete crack data monitoring and acquisition, and a measuring point installation assembly 2 for its arrangement and installation. The sensor body 1 has a built-in sensing element adapted for concrete crack monitoring, such as a distributed fiber optic grating element, which can directly capture key parameters such as strain changes and temperature fluctuations caused by crack initiation or expansion within the concrete. These parameters directly reflect the development state of the cracks, and will not be elaborated further here. The measuring point installation assembly 2 includes a mounting base 21 and a protective top cover 22. The protective top cover 22 is threadedly mounted on the top of the mounting base 21. A hand-held gripper is fixedly connected at the top axial position of the protective top cover 22. A transparent observation window is provided on the protective top cover 22. The transparent observation window is made of high-transmittance acrylic material, allowing direct observation of the installation status of the sensor body 1 inside the mounting base 21. This facilitates quick confirmation of whether the sensor is misaligned or has poor contact, and preliminary inspection can be completed without disassembling the top cover. Combination Figure 3 As shown, the sensor body 1 is installed inside the mounting base 21, and the buffer pad 3 is placed in the gap between the sensor body 1 and the mounting base 21. The buffer pad 3 is made of high-density sponge material with a thickness of more than 4mm. It can fill the gap to achieve flexible fixation of the sensor body 1, and absorb the impact force generated by concrete vibration or structural vibration, reducing mechanical damage to the sensor body 1. The bottom of the protective top cover 22 is fixedly connected to the limiting block 4. The lower surface of the limiting block 4 is set to abut against the upper surface of the sensor body 1. It fits the surface of the sensor body 1 through slight elastic deformation, achieving vertical limitation while avoiding wear of the sensor shell caused by hard contact.
[0014] Combination Figure 3 As shown, a reinforcing connection assembly is also provided between the mounting base 21 and the protective top cover 22. The reinforcing connection assembly includes reinforcing plates 25 fixedly connected to both sides of the upper surface of the protective top cover 22. The top of the protective top cover 22 has an annular groove, and the inner wall of the annular groove has a mounting groove 210. A return spring 211 is connected to the bottom inner wall of the mounting groove 210. An elastic locking head 212 elastically disposed on the mounting base 21 is fitted below the reinforcing plates 25. The top of the return spring 211 is connected to the elastic plate 25. The bottom of the locking clip 212 is fixedly connected, and the return spring 211 is always in a compressed state, providing a continuous upward elastic force to the elastic locking clip 212 to ensure a stable engagement; an arc-shaped locking buckle 26 is fixedly connected to the bottom of the reinforcing clip plate 25. The locking buckle 26 has a slot 260 that is adapted to the elastic locking clip 212 for engagement. The inner wall of the slot 260 is an arc-shaped surface that fits against the arc-shaped top of the elastic locking clip 212. During engagement, it can be automatically aligned through the arc-shaped guide, improving assembly efficiency.
[0015] Among them, see Figure 2 The sensor body 1 has a connecting end that passes through the mounting base 21. The mounting base 21 has a rubber sealing ring at the corresponding penetration position to prevent concrete slurry or water vapor from seeping into the mounting base 21 through the penetration point and to protect the sensor connecting end from corrosion. The bottom of the mounting base 21 also has a threaded hole, in which a connecting bolt 241 threaded rod for connecting extension rod 24 is installed. By replacing extension rods 24 of different lengths, the requirements for the arrangement of measuring points for concrete cracks of different depths can be met. At the same time, combined with the setting of connecting clamp 23, the transverse connection or clamp connection can be selectively performed.
[0016] Preferably, the bottom connection of the mounting base 21 is also provided with a connecting clamp 23. The connecting clamp 23 provides an optional way for the assembly and connection of the measuring point mounting assembly 2, avoiding overall displacement of the device and ensuring accurate positioning of the measuring point.
[0017] When using this concrete crack measuring point layout device, select an extension rod 24 of appropriate length according to the depth requirements of the concrete crack monitoring location, screw the connecting bolt 241 into the threaded hole at the bottom of the mounting base 21 to complete the connection between the extension rod 24 and the mounting base 21. If it is necessary to fix the measuring point mounting assembly 2 on the rod, the installation is achieved by connecting clamp 23, and the device is fixed as a whole by expansion bolts to ensure the stability of the measuring point position.
[0018] Next, install the sensor body 1. Open the protective top cover 22 and place the sensor inside the mounting base 21. At this time, the gap between the sensor body 1 and the mounting base 21 is filled by the buffer pad 3. The buffer pad provides initial fixation for the sensor through flexible support. Then, grasp the hand-held lever on the top of the protective top cover 22 and align the top cover with the thread on the top of the mounting base 21. Rotate clockwise to achieve threaded connection. During this process, the sensor status can be observed through the transparent observation window on the protective top cover 22 to ensure that it is not tilted. When the protective top cover 22 and the mounting base 21 are threadedly connected, the limiting pressure block 4 at the bottom of the protective top cover 22 will engage with the sensor. The surface contact, through the slight elastic deformation of the silicone material, forms a vertical limit for the sensor; at the same time, the reinforcing plates 25 on both sides of the upper surface of the protective top cover 22 move downward as the protective top cover 22 rotates, and the locking buckle 26 below the reinforcing plate 25 gradually approaches the elastic locking head 212. Under the elastic force of the return spring 211, the elastic locking head 212 is pushed upward, and finally the elastic locking head 212 is locked into the buckle 260 of the locking buckle 26, forming a secondary lock, further strengthening the connection stability between the mounting base 21 and the protective top cover 22, avoiding loosening during subsequent use, and also improving the stability of the sensor body 1 during concrete vibration; preventing loosening.
[0019] After installation, the connecting end of the sensor body 1 passes through the pre-set through hole of the mounting base 21. The rubber sealing ring at the through hole prevents water vapor and grout from seeping in. It can be connected to the external data receiving device to start monitoring and collecting concrete crack data. If it is necessary to check the sensor status, there is no need to disassemble the device. It can be quickly confirmed through the transparent observation window to ensure continuous and stable monitoring.
[0020] The specific embodiments of the utility model have been described in detail above, but they are only examples, and the utility model is not limited to the specific embodiments described above. For those skilled in the art, any equivalent modifications or substitutions to the utility model are also within the scope of the utility model. Therefore, all equivalent transformations, modifications, and improvements made without departing from the spirit and principles of the utility model should be covered within the scope of the utility model.
Claims
1. A concrete crack measuring point arrangement device, comprising a sensor body (1) for monitoring and acquiring concrete crack data and a measuring point installation assembly (2) for its arrangement and installation, characterized in that, The measuring point mounting assembly (2) includes a mounting base (21) and a protective top cover (22). The protective top cover (22) is screwed and rotated on the top of the mounting base (21). The sensor body (1) is installed inside the mounting base (21) and a buffer pad (3) is placed in the gap between the sensor body (1) and the mounting base (21). A reinforcing connection assembly is also provided between the mounting base (21) and the protective top cover (22). The reinforcing connection assembly includes a reinforcing plate (25) fixedly connected to both sides of the upper surface of the protective top cover (22). An elastic locking head (212) is elastically set on the mounting base (21) below the reinforcing plate (25).
2. The concrete crack measuring point arrangement device according to claim 1, characterized in that, The protective top cover (22) has an annular groove on its top, and an installation groove (210) is provided on the inner wall of the annular groove. A reset spring (211) is connected to the bottom inner wall of the installation groove (210). The top of the reset spring (211) is fixedly connected to the bottom of the elastic locking head (212).
3. The concrete crack measuring point arrangement device according to claim 2, characterized in that, An arc-shaped locking buckle plate (26) is fixedly connected to the lower part of the reinforcing buckle plate (25). The locking buckle plate (26) has a slot (260) that is adapted to be fitted with the elastic locking buckle head (212).
4. The concrete crack measuring point arrangement device according to claim 1, characterized in that, A hand-held pinch block is fixedly connected at the top axis position of the protective top cover (22), and a transparent observation window is provided on the protective top cover (22); The bottom of the protective top cover (22) is fixedly connected to a limiting block (4), and the lower surface of the limiting block (4) is set to abut against the upper surface of the sensor body (1).
5. A concrete crack measuring point arrangement device according to claim 1, characterized in that, The connecting end of the sensor body (1) passes through the mounting base (21). The bottom of the mounting base (21) is also provided with a threaded hole, and a connecting bolt (241) for connecting the extension rod (24) is provided in the threaded hole.
6. The concrete crack measuring point arrangement device according to claim 1, characterized in that, The bottom connection of the mounting base (21) is also provided with a connecting clamp (23).