Bridge water seepage detection device

Abstract

The utility model relates to a kind of bridge water seepage detection device in bridge detection technical field, to solve the problem of prior art cannot be advanced to judge water seepage situation, detection lag and difficult to be flexibly applicable to bridge different parts detection environment. Its technical scheme main point is: including glass fibre mat with water guide pipe and multilayer water vapor through-hole, built-in moisture detection device, main auxiliary moisture detector and built-in humidity detection device, by the continuous air passage real-time monitoring structure inside humidity change to realize early warning by stainless steel shell through-hole, fixed frame through-hole and each layer base through-hole series connection structure, simultaneously, liquid water appearing is guided to detection area by built-in water guide pipe and is confirmed by contact type moisture detector Water seepage, combined with the modularization shell design with installation interface, the dual detection mechanism of early warning and confirmation and the flexible layout in each part of bridge body are realized.The utility model is mainly used for early discovery, leakage positioning and long-term safety monitoring of bridge structure water seepage.

Description

Technical Field

[0001] This utility model relates to the technical field of bridge safety monitoring, and in particular to a bridge seepage detection device. Background Technology

[0002] During long-term use, bridges are prone to cracks in key components such as the deck, web, and piers due to material aging, load fatigue, and environmental factors, leading to water seepage. Moisture penetrating the concrete can cause steel corrosion, freeze-thaw damage, and alkali-aggregate reaction, severely weakening the bridge's load-bearing capacity and service life.

[0003] Currently, the detection of bridge seepage relies heavily on regular manual inspections. Maintenance personnel typically visually inspect the bridge surface for watermarks, whitening, or other signs of seepage, or use simple tools like measuring cups to collect and measure suspected seepage points. This method has significant limitations: First, it is reactive, only detecting seepage after it has become apparent, failing to provide early warning; second, manual inspection is inefficient, heavily influenced by personnel experience and subjective factors, and prone to omissions; finally, manual inspection is difficult to implement in complex or space-constrained bridge sections, lacking versatility and inability to flexibly adapt to various inspection environments.

[0004] Therefore, there is an urgent need in this field for a detection device that can automatically and in real time monitor and provide early warnings of water seepage risks by detecting changes in water vapor, and can be flexibly installed in various bridge environments. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the shortcomings of the existing technology and provide a bridge seepage detection device that can realize early warning and accurate location of bridge seepage, and has the characteristics of flexible installation, strong adaptability and good durability.

[0006] The technical solution adopted by this utility model to solve its technical problem is: a bridge seepage detection device, which sets the side closer to the bridge as the upper side and the side farther away from the bridge as the lower side, including a detection device body and a stainless steel outer casing that covers the detection device body.

[0007] The detection device body includes:

[0008] A fiberglass mat, the upper surface of which is attached tightly to the bridge, has at least one built-in anti-corrosion water-guiding capillary tube 1 and at least one built-in anti-corrosion water-guiding capillary tube 2 running through its interior, and has water vapor passage holes running through its upper and lower parts.

[0009] A corrosion-resistant and moisture-proof base is fixedly connected to the lower surface of the glass fiber pad. A base water vapor passage hole communicating with the water vapor passage hole of the glass fiber pad is opened on the base. A built-in moisture detection device is fixedly connected to the lower surface of the corrosion-resistant and moisture-proof base.

[0010] A sealed chassis is fixedly connected to the lower surface of the built-in moisture detection device. A water vapor passage hole is opened inside the chassis. A main moisture detector and an auxiliary moisture detector are installed on the sealed chassis. The main moisture detector and the auxiliary moisture detector are electrically connected to the built-in moisture detection device and are used to process its detection signal.

[0011] The U-shaped fixing bracket has its open end facing upward and fixedly connected to the lower surface of the glass fiber pad, and its closed end facing downward. A built-in humidity detection device is fixedly connected to the lower surface of the closed end.

[0012] The built-in anti-corrosion water-guiding capillary tube one and the built-in anti-corrosion water-guiding capillary tube two are used to guide liquid water to the built-in moisture detection device and the built-in humidity detection device.

[0013] Ambient moisture passes sequentially through the moisture vents on the stainless steel casing, the mounting bracket, the fiberglass pad, the base, and the chassis before being detected by the built-in humidity detection device.

[0014] This application further specifies that, in the above technical solution, the stainless steel outer shell is also provided with a humidity gas detection through hole, which is directly opposite the built-in humidity detection device to achieve gas balance.

[0015] To prevent the core detection components from corroding and failing due to prolonged contact with moisture, this application further specifies that, in the above technical solution, the side surfaces of the sealed chassis, the main moisture detector, and the auxiliary moisture detector are all tightly fitted with an anti-corrosion coating. By applying this anti-corrosion coating, the most critical detection components are directly protected, significantly improving the durability and measurement stability of the core detection unit.

[0016] To prevent moisture and corrosive media from entering the device from the sides, this application further specifies that, in the above technical solution, the side surface of the stainless steel shell is tightly fitted with an anti-corrosion side baffle. By setting the anti-corrosion side baffle, the lateral protection level of the device is effectively improved, and its service life in harsh environments is extended.

[0017] To achieve the moisture detection function and ensure the reliability and accuracy of the detection, this application further specifies that the main moisture detector and the auxiliary moisture detector in the above technical solution are resistive or capacitive moisture sensors. By clarifying the specific selection of the moisture detector, a mature and reliable implementation scheme is provided to those skilled in the art, ensuring the effectiveness of the basic detection function.

[0018] To achieve the humidity detection function and ensure the sensitivity and accuracy of early warning, this application further specifies that the built-in humidity detection device in the above technical solution is a polymer thin-film capacitive or resistive humidity sensor. By clarifying the specific selection of the humidity detection device, a technical guarantee is provided for achieving the core early warning function of high-precision water vapor detection.

[0019] To achieve flexible and secure installation of the device at different locations on the bridge, this application further specifies that, in the above technical solution, the stainless steel outer shell is provided with mounting through holes, and at least one mounting nut is fixedly connected to its outer surface. The mounting through holes and mounting nuts provide a variety of flexible installation methods, ensuring that the device can be stably fixed in various complex testing environments.

[0020] The beneficial effects of this invention are as follows: By constructing a continuous water vapor flow path consisting of water vapor passages in the stainless steel shell, glass fiber pad, base, and chassis, the device can sensitively detect water vapor emitted from the inside of the bridge concrete due to moisture infiltration. The built-in humidity detection device monitors water vapor in real time, enabling early detection of abnormal humidity increases before liquid water seeps out or visible damage occurs, thus issuing an early warning. It uniquely employs a dual-path system for water vapor warning and liquid water detection. On one hand, early warning is achieved through the water vapor path; on the other hand, liquid water is guided to the built-in moisture detection device through two built-in anti-corrosion water-guiding tubes, where the main / auxiliary moisture detectors perform contact detection for final confirmation of the seepage event. This dual detection mechanism verifies each other, ensuring both the sensitivity of the warning and the accuracy of seepage confirmation, significantly reducing the risk of false alarms and missed alarms. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the structure of this utility model;

[0023] Figure 2 yes Figure 1 A sectional view.

[0024] The labels in the diagram are as follows: 1. Fiberglass pad; 2. Corrosion-resistant and moisture-proof base; 3. Sealed chassis; 4. U-shaped fixing bracket; 5. Stainless steel shell; 6. Main moisture detector; 7. Auxiliary moisture detector; 8. Chassis moisture vent; 9. Base moisture vent; 10. Fiberglass pad moisture vent; 11. Fixing bracket moisture vent; 12. Stainless steel shell moisture vent; 14. Humidity gas detection vent; 15. Mounting vent; 17. Built-in moisture detection device; 18. Built-in humidity detection device; 19. Built-in corrosion-resistant water-guiding capillary tube one; 20. Built-in corrosion-resistant water-guiding capillary tube two. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0026] This invention provides a bridge seepage detection device, mainly used for seepage monitoring and early warning in key parts of bridges. Its core lies in achieving early warning and accurate detection of potential seepage hazards through independent water vapor flow paths and liquid water guidance paths, and it adopts a modular design to adapt to flexible installation requirements.

[0027] Reference Figure 1 and Figure 2 In this embodiment, the bridge seepage detection device is installed with the side closer to the bridge structure designated as "upper" and the side farther from the bridge structure designated as "lower." The device mainly consists of the detection device body and a stainless steel outer shell 5 enclosing it. The detection device body is the core component for performing the detection function; it is composed of a fiberglass pad 1, a corrosion-resistant and moisture-proof base 2, a sealed chassis 3, and a U-shaped fixing frame 4, stacked and fixedly connected layer by layer from top to bottom.

[0028] The fiberglass mat 1, serving as the direct contact layer with the bridge surface, is made of dense and breathable fiberglass material. Its upper surface is tightly adhered to the area of ​​the bridge to be tested using a special adhesive or mechanical pressure. The fiberglass mat 1 has two internally installed, vertically penetrating, anti-corrosion water-guiding capillary tubes: a first tube 19 and a second tube 20, both made of corrosion-resistant polyethylene tubing. Additionally, multiple water vapor vents 10 are evenly distributed throughout the mat, running vertically from top to bottom.

[0029] The corrosion-resistant and moisture-proof base 2 is fixedly connected to the lower surface of the fiberglass pad 1 using waterproof sealant or bolts. The base 2 is injection molded from ABS engineering plastic, and its interior has moisture-proof holes 9 corresponding to the number and position of the moisture-proof holes 10 in the fiberglass pad, ensuring unobstructed airflow. A built-in moisture detection device 17 is fixedly installed on the lower surface of the base 2 using a slot and a sealing ring. This built-in moisture detection device 17 is a packaged sensor module containing signal processing circuitry.

[0030] A sealed chassis 3 is fixedly connected to the lower surface of the built-in moisture detection device 17, with a silicone sealing gasket between them to ensure airtightness. The sealed chassis 3 is also made of corrosion-resistant material, and its interior has a chassis water vapor passage 8 that communicates with the aforementioned air passage. On the side of the sealed chassis 3 facing the bridge (i.e., the upper side), a main moisture detector 6 and an auxiliary moisture detector 7 are embedded, which are contact-type moisture sensors based on the principle of resistance measurement. The signal output terminals of the main moisture detector 6 and the auxiliary moisture detector 7 are electrically connected to the built-in moisture detection device 17; the built-in moisture detection device 17 is used to receive and process signals from its own detection area and the moisture detectors. During use, the sealed chassis 3 tightly seals the base water vapor passage 9, the chassis water vapor passage 8, the main moisture detector 6, and the auxiliary moisture detector 7 at the contact surface between the device and the bridge.

[0031] The U-shaped mounting bracket 4 serves as the load-bearing skeleton of the entire device, and is made of high-strength aluminum alloy profile bent into shape. Its open end faces upwards and is securely connected to the lower surface periphery of the fiberglass pad 1 using four sets of stainless steel bolts. Its closed end faces downwards, and a built-in humidity detection device 18 is fixedly installed on the lower surface of this closed end using screws. This built-in humidity detection device 18 is a polymer thin-film capacitive humidity sensor, with its probe facing the airflow direction to accurately sense the relative humidity of the air.

[0032] The stainless steel outer shell 5, made of 304 stainless steel, serves as the final protective cover. It is connected to the side wall of the U-shaped fixing frame 4 via screws through its folded edges, thus encapsulating all the internal structures and forming a unified whole. A water vapor inlet 12 is provided on the side of the stainless steel outer shell 5, serving as the main air inlet for water vapor. A humidity gas detection inlet 14 is located at the center of the top plate (facing the bridge side) of the stainless steel outer shell 5. This inlet 14 is directly opposite the sensing unit of the built-in humidity detection device 18, used to achieve micro-circulation and pressure balance of the gas around the sensor. Furthermore, the stainless steel outer shell 5 also has mounting holes 15, with multiple mounting nuts welded to its outer surface, facilitating the use of bolts to fix the entire device to the bridge surface.

[0033] To ensure the long-term durability of the device in the harsh environment of bridges, an epoxy-based anti-corrosion coating is applied to the side surfaces of the sealed chassis 3, the main moisture detector 6, and the auxiliary moisture detector 7. Additionally, PVC anti-corrosion side panels are tightly fitted to the side surfaces of the stainless steel housing 5 using clips to further enhance protection against side splashes of water or corrosive gases.

[0034] This invention achieves its dual detection function through two independent physical paths:

[0035] Moisture warning path: Moisture emitted from the bridge concrete due to moisture infiltration (a precursor to leakage) first enters the device through the stainless steel casing moisture vent 12, which serves as the main air inlet. Subsequently, the moisture flows through the fixing frame moisture vent 11 on the U-shaped fixing frame 4, and then upwards through the fiberglass pad moisture vent 10, the base moisture vent 9, and the chassis moisture vent 8, ultimately permeating the interior of the device. Seepage or moisture inside the bridge can effectively flow through the built-in anti-corrosion water-guiding capillary tube 19 and the built-in anti-corrosion water-guiding capillary tube 20 to the built-in moisture detection device 17 and the built-in humidity detection device 18.

[0036] Liquid water detection path: When leakage develops and visible liquid water appears, the water is collected and guided by gravity and capillary action through the built-in anti-corrosion water-conducting capillary tubes 19 and 20 within the fiberglass pad 1. Simultaneously, the main moisture detector 6 and auxiliary moisture detector 7, directly exposed to the seepage environment, will also experience significant changes in their electrode resistance due to contact with liquid water. The built-in moisture detection device 17 receives and processes signals from its own detection area and the moisture detectors, confirming the occurrence of a seepage event and triggering an alarm.

[0037] The mounting nuts on the five surfaces of the stainless steel casing allow for flexible installation of the device as needed. The device can be assembled and installed in sections with measuring rulers and other components as required, enabling flexible and convenient detection of water seepage and early prediction of water seepage conditions through changes in water vapor on bridges. The signals detected by the detector are connected to external terminals via wires.

[0038] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. A bridge seepage detection device, characterized in that, The side closer to the bridge is designated as the top, and the side farther from the bridge is designated as the bottom. The device includes the detection device body and a stainless steel shell (5) that encloses the detection device body. The detection device body includes: A glass fiber mat (1) has its upper surface attached to the bridge. At least one built-in anti-corrosion water-conducting capillary tube (19) and at least one built-in anti-corrosion water-conducting capillary tube (20) are installed inside, and a glass fiber mat water vapor passage (10) is opened through it. The anti-corrosion and moisture-proof base (2) is fixedly connected to the lower surface of the glass fiber pad (1), and a base water vapor passage (9) communicating with the water vapor passage (10) of the glass fiber pad is provided on it. A built-in moisture detection device (17) is fixedly connected to the lower surface of the anti-corrosion and moisture-proof base (2). A sealed chassis (3) is fixedly connected to the lower surface of the built-in moisture detection device (17). A water vapor passage hole (8) is opened inside the chassis. A main moisture detector (6) and an auxiliary moisture detector (7) are provided on the sealed chassis (3). The main moisture detector (6) and the auxiliary moisture detector (7) are electrically connected to the built-in moisture detection device (17) and are used to process its detection signal. The U-shaped fixing bracket (4) has its open end facing upward and is fixedly connected to the lower surface of the glass fiber pad (1), and its closed end facing downward. The lower surface of the closed end is fixedly connected to a built-in humidity detection device (18). The built-in anti-corrosion water-guiding capillary tube one (19) and the built-in anti-corrosion water-guiding capillary tube two (20) are used to guide liquid water to the built-in moisture detection device (17) and the built-in humidity detection device (18). Ambient moisture passes through the stainless steel shell moisture passage (12) on the stainless steel shell (5), the fixing frame moisture passage (11) on the U-shaped fixing frame (4), the glass fiber pad moisture passage (10), the base moisture passage (9) and the chassis moisture passage (8) in sequence, and is then detected by the built-in humidity detection device (18).

2. The bridge seepage detection device according to claim 1, characterized in that, The stainless steel casing (5) is also provided with a humidity gas detection through hole (14), which is directly opposite the built-in humidity detection device (18) to achieve gas balance.

3. The bridge seepage detection device according to claim 1, characterized in that, The side surfaces of the sealed chassis (3), the main moisture detector (6) and the auxiliary moisture detector (7) are all tightly fitted with an anti-corrosion coating.

4. The bridge seepage detection device according to claim 1, characterized in that, The stainless steel shell (5) has a corrosion-resistant side baffle tightly attached to its side surface.

5. A bridge seepage detection device according to claim 1, characterized in that, The main moisture detector (6) and the auxiliary moisture detector (7) are resistive or capacitive moisture sensors.

6. A bridge seepage detection device according to claim 1, characterized in that, The built-in humidity detection device (18) is a polymer thin film capacitive or resistive humidity sensor.

7. A bridge seepage detection device according to claim 1, characterized in that, The stainless steel housing (5) is provided with a mounting through hole (15), and at least one mounting nut is fixedly connected to its outer surface.

Images