A device for detecting corrosion of steel bars of a pile foundation in a deep sea area

Abstract

The utility model relates to a kind of deep-sea area pile foundation steel bar corrosion detection device, belong to steel bar corrosion detection equipment technical field.The deep-sea area pile foundation steel bar corrosion detection device, it include: resistance tester, alarm and the protection installation mechanism of uniform distribution, the resistance tester is electrically connected with alarm by wire, the detection end of the resistance tester is equipped with waterproof sheath, the inside of waterproof sheath is embedded and is equipped with the probe of uniform distribution, the detection end of the probe is penetrated out waterproof sheath;Protection installation mechanism is stably mechanically fixed by the thread connection of threaded joint and the thread connection of threaded embedded cylinder, hot melt adhesive ring and sealing rubber ring form double-sealing barrier, effectively resist deep-sea high-pressure environment;Capacitance type water level sensor real-time monitoring the area between hot melt adhesive ring and sealing rubber ring, immediately trigger alarm once detecting leakage, prevent internal circuit corrosion damage.

Description

Technical Field

[0001] This utility model relates to the technical field of steel reinforcement corrosion detection equipment, and in particular to a steel reinforcement corrosion detection device for pile foundations in deep-sea areas. Background Technology

[0002] Corrosion detection of steel reinforcement in deep-sea pile foundations primarily relies on long-term monitoring technology using embedded sensors. These sensors, equipped with high-pressure-resistant resistivity and potential sensors, are implanted during construction to assess the real-time corrosion of chloride ions within the concrete and the state of steel reinforcement corrosion. Long-term embedded monitoring is the mainstream approach and development direction for ensuring structural safety.

[0003] The extreme high-pressure environment of the deep sea continuously tests the integrity of sensor packaging and cable connectors, making them highly susceptible to seal breaches due to material creep, interface aging, or mechanical damage. Once high-pressure seawater seeps in, it will immediately trigger internal circuit short circuits and corrosion, causing permanent and irreparable damage to the entire sensor node. Utility Model Content

[0004] Therefore, it is necessary to provide a corrosion detection device for steel reinforcement in pile foundations in deep-sea areas, addressing the core technical issue that the long-term sealing reliability of deep-sea pre-embedded sensors is a constraint on their ability to ensure pile foundation safety.

[0005] A device for detecting corrosion of steel reinforcement in pile foundations in deep-sea areas includes: a resistance tester, an alarm, and a uniformly distributed protective installation mechanism. The resistance tester is electrically connected to the alarm via a wire. The detection end of the resistance tester is covered with a waterproof sleeve. Uniformly distributed probes are embedded inside the waterproof sleeve, and the detection ends of the probes extend through the waterproof sleeve.

[0006] In one embodiment, the protective installation mechanism includes a threaded connector fixedly connected to the probe surface. A threaded embedded cylinder is threadedly connected to the surface of the threaded connector. A hot melt adhesive ring is hot-melted and embedded between the threaded connector and the threaded embedded cylinder. A sealing ring is embedded between the threaded connector and the threaded embedded cylinder, located inside the hot melt adhesive ring. A capacitive water level sensor is embedded at one end of the threaded connector facing the threaded embedded cylinder. The capacitive water level sensor is located between the hot melt adhesive ring and the sealing ring. The lead wire of the capacitive water level sensor passes through the threaded connector and the waterproof sleeve in sequence and is electrically connected to the alarm.

[0007] In one embodiment, annular grooves that communicate with each other are provided between the threaded joint and the threaded embedded cylinder, and the hot melt adhesive ring is simultaneously embedded in the interior of both annular grooves.

[0008] In one embodiment, the common shape of the two annular grooves combined together and the shape of the hot melt adhesive ring are both matching cylindrical shapes.

[0009] In one embodiment, the threaded joint has an annular liquid guiding cavity at one end facing the threaded pre-embedded cylinder, and the detection end of the capacitive water level sensor extends into the interior of the annular liquid guiding cavity.

[0010] In one embodiment, the vertical cross-sectional shape of the annular liquid guiding cavity is O-shaped, and the detection end of the capacitive water level sensor is attached to the lowest point of the annular liquid guiding cavity.

[0011] In one embodiment, a connecting groove is provided between the threaded joint and the threaded embedded cylinder, and the sealing ring is inserted between the two connecting grooves.

[0012] In one embodiment, the common vertical cross-sectional shape of the two connecting grooves combined together and the vertical cross-sectional shape of the sealing ring are both matching cross shapes.

[0013] In one embodiment, the sealing ring is a component made of a mixture of natural sodium bentonite and silicone rubber.

[0014] Beneficial effects

[0015] 1. The above-mentioned deep-sea pile foundation steel corrosion detection device provides a stable mechanical fixation through the threaded connection between the threaded joint and the threaded pre-embedded cylinder. The hot melt adhesive ring and the sealing rubber ring form a double sealing barrier to effectively resist the high pressure environment of the deep sea. The capacitive water level sensor monitors the area between the hot melt adhesive ring and the sealing rubber ring in real time. Once leakage is detected, the alarm is triggered immediately to prevent corrosion damage to the internal circuit.

[0016] 2. The annular liquid guiding cavity adopts an O-shaped design to collect water at the lowest point, and the detection end of the capacitive water level sensor is in close contact with it to improve the sensitivity of leak detection; the sealing ring is made of a mixture of natural sodium-based bentonite and silicone rubber, which expands when it comes into contact with water to enhance the sealing performance and ensure long-term reliability. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in 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 some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram showing a cut of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of a partial structure in this utility model;

[0020] Figure 3This is an exploded view of a partial structure of this utility model;

[0021] Figure 4 This is a cross-sectional schematic diagram of a partial structure in this utility model;

[0022] Figure 5 This is a schematic diagram of the shape of the sealing ring in this utility model.

[0023] Figure label:

[0024] 100. Resistance tester; 200. Waterproof sleeve; 300. Probe; 400. Protective installation mechanism; 410. Threaded joint; 411. Annular liquid guiding cavity; 420. Threaded embedded cylinder; 430. Hot melt adhesive ring; 440. Sealing adhesive ring; 450. Capacitive water level sensor; 460. Ring groove; 470. Connecting groove; 500. Alarm. 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, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0026] The following is combined Figure 1 - Figure 5 This invention describes a device for detecting corrosion of steel reinforcement in pile foundations in deep-sea areas.

[0027] In one embodiment, a deep-sea pile foundation steel corrosion detection device includes: a resistance tester 100, an alarm 500, and a uniformly distributed protective installation mechanism 400. The resistance tester 100 is electrically connected to the alarm 500 via a wire. The detection end of the resistance tester 100 is covered with a waterproof sleeve 200. The interior of the waterproof sleeve 200 is embedded with uniformly distributed probes 300, and the detection ends of the probes 300 extend through the waterproof sleeve 200.

[0028] like Figure 2 , Figure 3 , Figure 4 and Figure 5As shown, the protective installation mechanism 400 includes a threaded connector 410 fixedly connected to the surface of the probe 300. A threaded embedded cylinder 420 is threadedly connected to the surface of the threaded connector 410. A hot melt adhesive ring 430 is hot-melted and embedded between the threaded connector 410 and the threaded embedded cylinder 420. A sealing ring 440 is embedded between the threaded connector 410 and the threaded embedded cylinder 420 and is disposed inside the hot melt adhesive ring 430. A capacitive water level sensor 450 is embedded at one end of the threaded connector 410 facing the threaded embedded cylinder 420. The capacitive water level sensor 450 is disposed between the hot melt adhesive ring 430 and the sealing ring 440. The lead wire of the capacitive water level sensor 450 passes through the threaded connector 410 and the waterproof sleeve 200 in sequence and is electrically connected to the alarm 500.

[0029] like Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, annular grooves 460 are provided between the threaded connector 410 and the threaded embedded cylinder 420, and hot melt adhesive rings 430 are simultaneously embedded in the two annular grooves 460. The common shape of the two annular grooves 460 and the shape of the hot melt adhesive rings 430 are both matching cylindrical shapes. An annular liquid guiding cavity 411 is provided at one end of the threaded connector 410 facing the threaded embedded cylinder 420, and the detection end of the capacitive water level sensor 450 passes through the interior of the annular liquid guiding cavity 411. The vertical cross-sectional shape of 1 is O-shaped, and the detection end of the capacitive water level sensor 450 is in contact with the lowest point of the annular liquid guiding cavity 411; the threaded joint 410 and the threaded pre-embedded cylinder 420 are both provided with interconnected connecting grooves 470, and the sealing ring 440 is inserted between the two connecting grooves 470; the common vertical cross-sectional shape of the two connecting grooves 470 combined together and the vertical cross-sectional shape of the sealing ring 440 are both matching cross shapes; the sealing ring 440 is a component of a mixture of natural sodium-based bentonite and silicone rubber.

[0030] In this embodiment, during initial installation, the entire device begins by fixing the threaded pre-embedded cylinder 420 to the pile foundation reinforcement cage according to design requirements. Then, the sealing ring 440 is pre-embedded into the connecting groove 470 installed on the threaded connector 410. Subsequently, the probe 300 with the threaded connector 410 is screwed into the threaded pre-embedded cylinder 420, ensuring a tight connection. At this time, the sealing ring 440 is simultaneously embedded in both connecting grooves 470, forming the first sealing barrier. At the connection between the threaded connector 410 and the threaded pre-embedded cylinder 420, the raw material of the hot-melt adhesive ring 430 is completely filled into the two annular grooves 460 through a hot-melt process, forming a complete hot-melt adhesive ring 430, thus forming the second sealing barrier. After mechanical installation is completed, a system power-on test is performed to verify that the resistance tester 100 can normally read the initial resistance values ​​of each probe 300 and that the alarm 500 is in standby mode.

[0031] During normal operation, the resistance tester 100 automatically measures the resistance of the reinforcing steel bars through the probe 300 at preset time intervals. When an abnormal change in the resistance value of a certain probe 300 is detected, the resistance tester 100 transmits the abnormal signal to the alarm 500. After receiving the signal, the alarm 500 verifies the data and, upon confirming the abnormality, activates the audible and visual alarm and sends the alarm information, including the abnormal probe 300 number, detection time, and resistance change amplitude, to the monitoring center through the communication module. At the same time, the system automatically calculates the corrosion rate and remaining life assessment of the reinforcing steel bars based on the resistance change data. Long-term monitoring data can generate a corrosion trend chart to provide a basis for maintenance decisions.

[0032] Working principle: During normal operation, the capacitive water level sensor 450 monitors the medium state in the annular liquid guiding chamber 411 in real time. When leakage occurs at the connection, water enters the annular liquid guiding chamber 411 and collects at the lowest point. After detecting the water based on the change in the dielectric constant of the medium, the capacitive water level sensor 450 transmits the signal to the alarm 500 through the wire. After filtering and amplifying the signal, the alarm 500 activates a graded alarm based on the water level detection result: the first-level alarm indicates that there may be a slight leakage, and the second-level alarm confirms that there is a significant leakage at the connection. At the same time, the system automatically generates emergency handling suggestions and records the occurrence time, duration and severity of the leakage event, providing data support for subsequent maintenance. After repair, the repair effect can also be verified by the collaborative work of the resistance tester 100 and the capacitive water level sensor 450.

[0033] It should be noted that the resistance tester 100 is a multi-channel, high-precision instrument, model CHT3541X, with a plug-in design supporting distributed multi-point synchronous measurement. It has a wide measurement range of 10μΩ to 300kΩ and is equipped with a true-color LCD screen and a remote communication interface. The probe 300 must be made of corrosion-resistant materials such as stainless steel, titanium alloy, or PEEK engineering plastic. Options include the Virui Technology fluorescent fiber optic probe or the Keyence IL series sensor with its metal coating and precision connector design, ensuring signal stability and anti-interference in the high-pressure environment of the deep sea. The capacitive water level sensor 450 can be either the GEMS CAP-300 series compact stainless steel sensor or the LOSEN CL series RF admittance sensor. These sensors have an IP67 high protection rating and can withstand the harsh environment and coating effects of the deep sea. The alarm 500 can be the Anxinwei AXW-1899 multi-functional host, supporting multi-zone input, featuring a high-sound-pressure horn and automatic dialing function, and capable of simultaneously responding to resistance over-limit and moisture intrusion signals.

[0034] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A device for detecting corrosion of reinforcing steel bars in pile foundations in deep-sea areas, characterized in that, include: A resistance tester (100) and an alarm (500) are provided. The resistance tester (100) is electrically connected to the alarm (500) via a wire. The detection end of the resistance tester (100) is covered with a waterproof sleeve (200). The waterproof sleeve (200) is embedded with evenly distributed probes (300). The detection end of the probes (300) extends through the waterproof sleeve (200). A uniformly distributed protective mounting mechanism (400) includes a threaded joint (410) fixedly connected to the surface of the probe (300). A threaded pre-embedded cylinder (420) is threadedly connected to the surface of the threaded joint (410). A hot-melt adhesive ring (430) is hot-melted and embedded between the threaded joint (410) and the threaded pre-embedded cylinder (420). A device disposed on the hot-melt adhesive ring is also embedded between the threaded joint (410) and the threaded pre-embedded cylinder (420). The sealing ring (440) is located inside the rubber ring (430). A capacitive water level sensor (450) is embedded in one end of the threaded joint (410) facing the threaded pre-embedded cylinder (420). The capacitive water level sensor (450) is located between the hot melt rubber ring (430) and the sealing ring (440). The lead wire of the capacitive water level sensor (450) passes through the threaded joint (410) and the waterproof sleeve (200) in sequence and is electrically connected to the alarm (500).

2. The deep-sea pile foundation steel corrosion detection device according to claim 1, characterized in that, The threaded connector (410) and the threaded embedded cylinder (420) are both provided with interconnected annular grooves (460), and the hot melt adhesive ring (430) is simultaneously embedded in the two annular grooves (460).

3. The deep-sea pile foundation steel corrosion detection device according to claim 2, characterized in that, The common shape of the two annular grooves (460) combined together and the shape of the hot melt adhesive ring (430) are both matching cylindrical shapes.

4. The deep-sea pile foundation steel corrosion detection device according to claim 1, characterized in that, The threaded connector (410) has an annular liquid guiding cavity (411) at one end facing the threaded pre-embedded cylinder (420), and the detection end of the capacitive water level sensor (450) extends into the interior of the annular liquid guiding cavity (411).

5. The deep-sea pile foundation steel corrosion detection device according to claim 4, characterized in that, The vertical cross-sectional shape of the annular liquid guiding cavity (411) is O-shaped, and the detection end of the capacitive water level sensor (450) is attached to the lowest point of the annular liquid guiding cavity (411).

6. The deep-sea pile foundation steel corrosion detection device according to claim 1, characterized in that, The threaded joint (410) and the threaded embedded cylinder (420) are both provided with interconnecting grooves (470), and the sealing ring (440) is inserted between the two connecting grooves (470).

7. The deep-sea pile foundation steel corrosion detection device according to claim 6, characterized in that, The common vertical cross-sectional shape of the two connecting grooves (470) combined together and the vertical cross-sectional shape of the sealing ring (440) are both matching cross shapes.

8. The deep-sea pile foundation steel corrosion detection device according to claim 6, characterized in that, The sealing ring (440) is a component made of a mixture of natural sodium bentonite and silicone rubber.

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