Liquid leakage detection and drainage system

Abstract

A liquid leakage detection and drainage system comprises a water retaining strip (1) which is arranged on a floor in a fire extinguishing system concentration area and forms a closed liquid accumulation area with the floor; the two leakage detection assemblies (2) comprise the upper leakage detection assembly (2B) and the lower leakage detection assembly (2A) and are arranged on the inner wall of the water retaining strip (1) in the vertical direction and parallel to a floor, the lower leakage detection assembly (2A) is arranged at the position where the water retaining strip (1) makes contact with the floor, and the upper leakage detection assembly (2B) is arranged at the position, away from the floor by the height (H), of the water retaining strip (1); a drainage rod (5); and the liquid discharge pipe (3) is arranged between the liquid accumulation area and the water discharge rod (5). The system is capable of collecting leaked liquid by using a water retaining strip, performing leakage detection by using a leakage detection assembly, and providing a combined alarm scheme according to allowable direct drainage flow during flight.

Description

Technical Field

[0001] This utility model relates to a liquid leak detection and drainage system, specifically a liquid leak detection and drainage system for an aircraft fire extinguisher. Background Technology

[0002] In the field of modern civil aircraft, fire extinguishers are widely used for firefighting. This necessitates the deployment of fire extinguisher systems on aircraft, especially requiring the installation of large-volume liquid storage tanks within the cabin, which also contains numerous piping connections. A large-scale liquid leak could significantly impact aircraft safety, and the leaked liquid cannot be expelled during flight. Currently, the main solution is to install level sensors in the liquid storage tanks of the fire extinguisher to detect changes in liquid level and thus determine if a leak has occurred. However, this approach has several drawbacks. First, the irregular shape of the liquid storage container in the fire extinguisher makes it susceptible to changes in flight attitude, significantly affecting level measurement. Furthermore, level measurement based on flight attitude correction exhibits a certain lag in its response to level changes. Second, due to the large volume of liquid stored in the fire extinguisher, sensor inaccuracies can lead to significant volume deviations in the actual measurement results. Finally, the lag in leak detection by level sensors in existing technologies can also result in erroneous identification and false alarms.

[0003] Various leak detection and drainage devices of this type exist in the prior art. For example, Chinese patent application CN117864302A, entitled "A Collection and Discharge System for Methanol Leakage in an Isolation Tank," submitted by Jiangnan Shipyard Group Co., Ltd., discloses a collection and discharge system for methanol leakage in an isolation tank on a ship. This system includes isolation tanks located below and on both sides of the methanol fuel tank, and is equipped with water injection connectors for diluting leaked methanol and a main discharge pipe for collecting and discharging the diluted methanol mixture. Once a leak occurs in the methanol fuel tank, a liquid detection sensor will trigger an alarm. Crew members can then introduce seawater through fire hoses to dilute the leaked methanol, and a jet pump will pump the diluted mixture to a methanol extraction device for separation, thus achieving methanol recovery and reuse.

[0004] Chinese patent application CN115420428A, submitted by the Shanghai Aerospace Electronic Communication Equipment Research Institute, entitled "A Leakage Collection and Monitoring Device for a Blind-Match Connector," discloses a leakage collection and monitoring device for a blind-match fluid connector. The device mainly consists of a liquid cooling plate, a fluid distributor, a sealing gasket, a leakage collection channel, and a positioning cable-type leakage sensor. A first sealing section is formed between the liquid cooling plate and the fluid distributor via the sealing gasket, enclosing the blind-match fluid connector to prevent leakage diffusion. The leakage collection channel passes through the fluid distributor and communicates with the first sealing section to collect leakage. The positioning cable-type leakage sensor is fixed inside the leakage collection channel to detect leakage and transmit the signal to the sensor host to determine the leakage location. This design can quickly locate the leakage point, promptly replace faulty connectors, and prevent heat dissipation problems caused by leakage, ensuring safe equipment operation.

[0005] Jiangsu New Yangzi Shipbuilding Co., Ltd.'s utility model patent CN217435981U, entitled "Treatment Device for Leaking Media in Type B Fuel Tank Containment System," discloses a device for treating leaking media in a Type B fuel tank containment system. It includes a fuel tank, an insulation layer, and a venting channel, with a secondary barrier unit added between the fuel tank and the hull to collect the leaked cryogenic media. The secondary barrier unit consists of a receiving pipe and a sump. A heating unit is installed at the bottom of the sump, and an exhaust unit is connected to the top. A cryogenic sensor is also installed on the sump. When a leak is detected, the heating unit rapidly vaporizes the cryogenic media in the sump and discharges it through the exhaust unit. This design not only enables timely leak detection but also treats the leaking media through heating and exhaust, avoiding impact on the hull structure and improving the system's safety and reliability.

[0006] While the existing technologies described above collect leaked liquid using a collection device and detect leaks by incorporating a cryogenic sensor within the device, several problems remain. First, the single-sensor design is essentially no different from the previous method of using a level sensor within a liquid storage container, and it cannot overcome the risk of false alarms caused by changes in the liquid level within the collection container due to aircraft attitude variations. Second, methods such as heating and evaporation to treat leaked liquid are not suitable for high-safety scenarios, such as those involving aircraft.

[0007] Therefore, there is an urgent need in the market for a liquid leak detection device that can overcome the above problems. This device should be applicable to civil aircraft, especially fire extinguishers for civil aircraft, and should have high detection accuracy and the function of collecting and draining liquid. Utility Model Content

[0008] This invention was made in view of the above-mentioned problems, and its purpose is to provide a liquid leakage detection and drainage system with high detection accuracy and the function of collecting and draining the liquid.

[0009] The liquid leak detection and drainage system of this utility model includes: a water-blocking strip, which is arranged on the floor of the fire extinguishing system concentration area, and the water-blocking strip and the floor form a closed liquid accumulation area; at least two leak detection components, each including at least an upper leak detection component and a lower leak detection component, which are arranged vertically on the inner wall of the water-blocking strip, wherein the two leak detection components are arranged parallel to the floor, the lower leak detection component is arranged at the position where the water-blocking strip contacts the floor, and the upper leak detection component is arranged at a predetermined height of the water-blocking strip from the floor, the predetermined height being less than or equal to the height of the water-blocking strip; a drainage rod, which is arranged on the outside of the aircraft; and at least one drainage pipe, which is arranged between the liquid accumulation area and the drainage rod.

[0010] The method of using water-blocking strips to collect leaked liquid and utilizing leak detection components replaces the use of level sensors in the storage tank to identify leaks based on liquid level changes. This avoids large fluctuations in the liquid level in the storage tank due to attitude changes during flight, which could lead to false leaks detected by the level sensor. By placing water-blocking strips in the concentrated area of ​​the fire suppression system to collect leaked liquid, and then measuring the amount of leaked liquid to determine whether the storage tank is leaking, the accuracy of the judgment is improved. Furthermore, by installing drain pipes, the leaked liquid can be discharged outside the aircraft via drain pipes and drain rods, further reducing the impact of leaks on the aircraft.

[0011] In a preferred embodiment, the leak detection assembly may include: a sleeve made of insulating material; an insulating support disposed within the sleeve; an upper metal wire disposed parallel to the sleeve at its upper portion; and a lower metal wire disposed parallel to the sleeve at its lower portion, below the upper metal wire. The upper and lower metal wires are spaced apart by the insulating support and supported within the sleeve by the insulating support. An opening, which may be a slot, is provided on the lower wall of the sleeve.

[0012] When the aircraft fire extinguisher leaks, the liquid accumulation area formed by the water-blocking strips can collect the leaking liquid. When the liquid collected in the accumulation area reaches a certain height, the liquid will enter the sleeve through the strip groove set on the lower pipe wall and first submerge the lower metal wire, then further submerge the upper metal wire. This makes the lower and upper metal wires conductive, at which point the lower leak detection component will trigger a "wet" signal, and the liquid will be discharged through the drain rod and an alarm will be recorded in the system. If the flow rate of the leaking liquid exceeds the drainage flow rate of the drain rod, the liquid height in the accumulation area will further increase, and it will pass through the strip groove on the lower pipe wall of the upper leak detection component's sleeve and submerge the lower metal wire, then further submerge the upper metal wire, making the lower and upper metal wires conductive, at which point the upper leak detection component will trigger a "wet" signal. Therefore, the liquid leak detection and drainage system provided by this utility model is an alarm scheme with combined alarm logic. In other words, when the lower leak detection component triggers a "wet" signal, indicating a leak volume less than the predetermined discharge volume, and the upper leak detection component issues a "dry" signal, the system will record the fault locally. Conversely, when the lower downhill detection component triggers a "wet" signal, and the leak volume exceeds the predetermined discharge volume, and the upper leak detection component also triggers a "wet" signal, the leaked liquid accumulates in the accumulation area, increasing the risk. The system will then record the fault locally and simultaneously alert the flight crew. This innovative leak detection component replaces the liquid level sensor in the storage tank, providing an alarm scheme with combined alarm logic. This avoids false alarms caused by changes in aircraft attitude due to liquid level variations, and more accurately transmits leak results.

[0013] Preferably, the height of the water-retaining strip is greater than the height H of the allowable temporary liquid accumulation, which is the predetermined height of the upper leak detection component from the floor.

[0014] The insulating support in the leakage detection component of the liquid leakage detection and drainage system provided by this utility model can be implemented as an insulating cable, and the two insulating cables are arranged opposite to each other to separate the upper metal wire and the lower metal wire.

[0015] The leakage component of the liquid leakage detection and drainage system provided by this utility model also includes encapsulated ends, which are arranged at both ends of the sleeve. Furthermore, the encapsulated ends are also provided with vent holes.

[0016] The leak detection component in the liquid leak detection and drainage system provided by this utility model is also equipped with a cable connector, which connects the leak detection component to the alarm system. When the detection signals of both leak detection components are "wet", the leak signal is sent to the alarm system via the cable connector to report a leak alarm to the unit, thereby realizing a safety alarm.

[0017] The drain rod in the liquid leak detection and drainage system provided by this invention is also equipped with a heating device. When the aircraft is in cold conditions, the drain rod may freeze and become blocked. By installing a heating device to heat the drain rod in a timely manner, the drain rod remains unobstructed, allowing leaked liquid to be discharged from the aircraft promptly, thus improving aircraft safety. Furthermore, the liquid leak detection and drainage system of this invention can also be equipped with at least one one-way valve, which is installed on the drain pipe between the liquid accumulation area and the drain rod. The one-way valve allows leaked liquid to flow unidirectionally from the liquid accumulation area to the drain rod, preventing backflow of the leaked liquid and further improving the safety and reliability of the aircraft.

[0018] The liquid leakage and drainage system of this invention may further include at least two drainage pipes, which are respectively arranged on the left and right sides along the flight direction of the aircraft and at the rear of the water deflector. With the drainage pipes arranged in this way, when the aircraft is climbing, it has an angle of attack. Due to gravity, the liquid in the accumulation area is located at the rear of the accumulation area, thus enabling the leaked liquid to be discharged outside the fuselage. By arranging the drainage pipes on the left and right sides along the flight direction of the aircraft, when the aircraft is turning, it has a roll angle. Due to centrifugal force, the leaked liquid in the accumulation area is concentrated on the left and right sides along the flight direction of the aircraft, also enabling the leaked liquid to be discharged outside the fuselage.

[0019] This invention's liquid leakage and drainage system offers the following technical advantages: It collects leaking liquid using a baffle strip and accurately identifies leakage events through an innovatively designed leakage detection component, replacing the traditional liquid level sensor-based leak detection method that relies on liquid level changes. This approach is more intuitive and reliable. Furthermore, it avoids false alarms caused by liquid level sensor fluctuations due to changes in aircraft attitude. By incorporating a groove at the bottom of the leak detection component's sleeve, it ensures that leaking liquid enters the detection component from the bottom, preventing false alarms caused by condensate dripping from the top. In addition, this invention features a combined warning design for drainage mechanisms based on different leakage volumes. Utilizing the aircraft's existing drainage rods, it provides a drainage channel and records alarms for leaks that can be directly drained. When the leakage exceeds the directly drainable amount, an alarm is triggered to the flight crew. Attached Figure Description

[0020] The accompanying drawings are only used to provide a further understanding of the present invention and constitute a part of this specification. They are used to explain the principles of the present invention and do not constitute a limitation thereof.

[0021] In the diagram:

[0022] Figure 1 This is a schematic diagram of the liquid leak detection and drainage system according to the present invention;

[0023] Figure 2 This is a side view of the liquid leak detection and drainage system according to the present invention;

[0024] Figure 3 for Figure 1 and Figure 2 A schematic diagram of the leak detection components of the liquid leak detection and drainage system shown;

[0025] Figure 4 For along Figure 3 The image shown is a cross-sectional view of the leak detection component taken by line AA.

[0026] List of reference numerals

[0027] 1. Water-retaining strip;

[0028] 2 Leakage Detection Components

[0029] 2A Lower Leak Detection Component;

[0030] 2B Upper Leak Detection Component;

[0031] 3 drain pipe;

[0032] 4. Check valve;

[0033] 5. Drainage rod;

[0034] 6. Cable connectors;

[0035] 21. Sleeve;

[0036] 22 grooves;

[0037] 23. Insulated cables;

[0038] 24. Attach metal wire;

[0039] 25 metal wires;

[0040] 26 Package terminal;

[0041] 27. Vent holes;

[0042] 100 floors;

[0043] H is the predetermined height of the upper leak detection component from the floor. Detailed Implementation

[0044] To fully understand this utility model, the specific implementation of the liquid leakage detection and drainage system of this utility model will be described below with reference to the accompanying drawings.

[0045] The terms "connection" and "fixing" refer to securing two objects or components together in some way, which can be permanent or detachable. The term "aircraft heading" refers to the approximate direction from the tail to the nose of the aircraft, or it can refer to the direction of movement of the aircraft in the horizontal plane or the direction of forward motion. The terms "vertical direction" or "up and down direction" refer to a direction approximately perpendicular to the ground or along the direction of gravity. The term "parallel" in this invention does not mean strictly parallel; two components may have a certain angle when relative to each other. The terms "support" or "support" refer to supporting and fixing mechanical components through specific components or structures to ensure they maintain the correct position and movement during operation.

[0046] The term "component" as used in this invention refers to a basic unit or part constituting a mechanical device. It can be a single part or a module assembled from multiple parts. In the following text, "longitudinal" means extending generally along the heading direction, but may also be inclined thereto, intended to distinguish it from the vertical direction. "Vertical" means generally perpendicular to the heading direction, but may also be inclined at an angle to it, intended to distinguish it from the horizontal or heading direction.

[0047] In this utility model, the term "water-blocking strip" includes many other shapes and forms besides "strip," such as "block," "plate," and "ring." Any component that can block liquid is within the protection scope of this utility model. The terms "top" or "upper part" refer to something generally located above a mechanical system, structure, or component, or above a reference component. "Bottom" or "lower part" refers to something generally located at the lowest point of a mechanical system or structure, or below a reference component.

[0048] The term "fire suppression system concentration area" refers to an area within an aircraft where fire extinguishers are densely arranged. This area primarily houses the liquid storage tanks and refueling pipelines used by the fire extinguishers, and is where liquid leaks are more likely to occur. Additionally, the term "drain bar" in this invention typically refers to a device or equipment used to drain water accumulated inside or outside the aircraft, usually located on the exterior of the aircraft.

[0049] like Figure 1The diagram shows a schematic of the liquid leak detection and drainage system of this invention. The system includes: a water-blocking strip 1, which is arranged on the floor 100 in the centralized area of ​​the fire extinguishing system, and the water-blocking strip 1 and the floor 100 form a closed liquid accumulation area, which is mainly used for temporary collection of liquid leaked from the fire extinguishing system; and two leak detection components 2, including a lower leak detection component 2A and an upper leak detection component 2B. These two leak detection components 2 are arranged vertically on the inner wall of the water-blocking strip 1, and are parallel to the floor 100. The lower leak detection component 2A... A is positioned at the contact point between the water-retaining strip 1 and the floor 100; the upper leakage component 2B is positioned at a height H above the floor on the water-retaining strip 1, which is less than or equal to the vertical height of the water-retaining strip 1; a drainage rod 5 is mounted on the fuselage of the aircraft and is capable of discharging the leaked liquid collected by the system to the outside of the fuselage; and a drain pipe 3 is positioned between the liquid accumulation area and the aforementioned drainage rod 5, with a first end mounted on the water-retaining strip 1 and a second end connected to the drainage rod 5, through which the leaked liquid flows from the liquid accumulation area to the drainage rod 5.

[0050] like Figure 2 The image shows a side view of the liquid leak detection and drainage system of this invention. The system also includes a one-way valve 4, which is installed on the drain pipe 3. This one-way valve 4 enables unidirectional flow between the liquid accumulation area and the drain rod 5, ensuring that gas or liquid flows from inside the aircraft cabin to the outside, preventing backflow. Furthermore, a heating device can be installed on the drain rod 5. When the aircraft is in a low-temperature environment, the drain rod is prone to icing and blockage. The heating device prevents the drain rod 5 from freezing when leaking liquid flows out.

[0051] like Figures 3 to 4 The diagram shows a schematic and cross-sectional view of the leak detection component of the liquid leak detection and drainage system of this utility model. This leak detection component 2 can be used as either a lower leak detection component 2A or an upper leak detection component 2B. The leak detection component 2 includes: a sleeve 21 made of insulating material; an upper metal wire 24 arranged parallel to the upper part of the sleeve 21; a lower metal wire 25 arranged parallel to the lower part of the sleeve 21, below the upper metal wire 24; and an insulating support member arranged inside the sleeve 21, separating the upper metal wire 24 and the lower metal wire 25, and supporting the upper metal wire 24 and the lower metal wire 25 within the sleeve 21. Figure 4 As shown, in this utility model, the insulating support can also be implemented as two opposing insulating cables 23, which separate the upper metal wire 24 and the lower metal wire 25 and support them within the sleeve 21. Figure 4As shown, a strip groove 22 is also provided on the lower wall of the sleeve 21. When the height of the collected liquid in the liquid accumulation area rises to the height of the leak detection component 2, the liquid enters the leak detection component 2 through the strip groove 22 and submerges the lower metal wire 25. When the liquid height rises further, the liquid submerges the upper metal wire 24. Due to the conductivity of the liquid, the upper metal wire 24 and the lower metal wire 25 are connected, and the signal of the leak detection component 2 changes from "dry" to "wet", and the fault is recorded.

[0052] like Figure 3 As shown, the leak detection component 2 also includes encapsulation ends 26, which are installed at both ends of the sleeve 21 of the leak detection component 2. Furthermore, the encapsulation ends 26 are provided with vent holes 27 to allow air to pass through the sleeve 21, enabling the liquid in the accumulation area to overcome atmospheric pressure and rise inside the sleeve 21. The leak detection component 2 also includes a cable connector 6, which connects the leak detection component 2 to the aircraft's alarm system, enabling the transmission of the signal detected by the leak detection component 2 to the alarm system to achieve the alarm function.

[0053] like Figure 1 and Figure 2 As shown, the liquid leak detection and drainage system of this invention includes two leak detection components 2: a lower leak detection component 2A and an upper leak detection component 2B. The leak detection alarm logic table of the liquid leak detection and drainage system of this invention is shown in Table 1 below.

[0054] Table 1 Leakage Detection Alarm Logic Table

[0055]

[0056] The working principle of the liquid leak detection and drainage system alarm is as follows: When a small amount of liquid leaks in the centralized area of ​​the fire extinguishing system, the leaking liquid is collected in the accumulation area and enters the lower leak detection component 2A. The upper metal wire 24 and lower metal wire 25 of the insulated cable 23 are connected through the liquid, the detection signal changes from "dry" to "wet", and the fault is recorded. The leaking liquid is discharged to the outside of the unit through the system's drain pipe 3 and drain rod 5. Since there is no safety hazard, the system does not alarm the unit. When the amount of liquid leaking in the centralized area of ​​the fire extinguishing system is large, the liquid accumulates in the accumulation area formed by the water-blocking strip 1 and the floor 100. When the liquid level rises to height H, the liquid enters the upper leak detection component 2B. Similarly, when the upper metal wire 24 and lower metal wire 25 are connected through the liquid, the signal of the upper leak detection component 2B changes from "dry" to "wet", and the system records the fault. Since the drain pipe 3 cannot effectively drain the collected liquid, the system will alarm the unit, and the unit will handle the situation further. As shown in Table 1 above, when only the signal from the lower leak detection component 2A is "wet," the leakage amount is less than the predetermined discharge amount. The system records a fault but does not alert the crew. When the leakage increases further, it accumulates in the accumulation area, causing the leakage to exceed the aircraft's predetermined discharge amount, further increasing the risk. In this case, when the signal from the upper leak detection component 2B is triggered as "wet," the system records a fault and sends a leak alarm to the crew. It should be noted that even if the signal from the lower leak detection component 2A is "dry" and the signal from the upper leak detection component 2B is "wet," a fault will still be recorded and an alarm will be sent to the crew. This is to avoid missing detection results due to a fault in the lower leak detection component.

[0057] Regarding the aforementioned height H, it is related to different aircraft types and the maximum liquid volume that the fire suppression system can store. Based on the leakage risk analysis of different aircraft fire suppression systems, the permissible temporary liquid accumulation volume of the aircraft is determined. Based on the layout of the centralized fire suppression system area, the liquid accumulation area formed by the water-retaining strip and the floor is determined. The volume of this liquid accumulation area should be greater than the permissible temporary liquid accumulation volume of the aircraft. Based on the area enclosed by the water-retaining strip and the floor, and the permissible temporary liquid accumulation volume of the aircraft, the temporary liquid accumulation height H of the liquid accumulation area is determined. The vertical height of the water-retaining strip must be greater than or equal to H.

[0058] Furthermore, the novel liquid leak detection and drainage system may also include two drainage pipes (not shown). The two drainage pipes can be arranged on the left and right sides of the water deflector, respectively, along the aircraft's heading, and on the rear of the water deflector, with their vertical arrangement height slightly higher than the lower leak detection assembly. This ensures that even when the aircraft has pitch and roll angles, the leaked liquid can still be fully discharged outside the fuselage.

[0059] The liquid leakage and drainage system provided by this invention collects leaking liquid using a baffle strip and accurately identifies leakage events through an innovatively designed leakage detection component. This replaces the traditional liquid level sensor-based leak detection method, which relies on changes in liquid level for identification, offering a more intuitive and reliable solution. It also avoids false alarms caused by liquid level sensor changes due to aircraft attitude variations. By incorporating a groove at the bottom of the leak detection component's sleeve, leaking liquid enters the detection component from the bottom, preventing false alarms caused by condensate dripping from the top. The combined alarm logic of the upper and lower leak detection components improves the accuracy of leak detection results. Furthermore, connecting the drain pipe and drain rod to the temporary liquid accumulation area allows for the simultaneous detection and drainage of leaking liquid, further enhancing aircraft reliability.

[0060] The implementation of this utility model is not limited to the embodiments described above, and can be adjusted and optimized according to different design requirements and usage environments. The scope of protection of this utility model should be determined by the content of the claims, and not limited to the embodiments described above. Although this utility model has been described through specific embodiments, any modifications, changes, and combinations made by those skilled in the art to various embodiments and implementation methods of this utility model without departing from the spirit of this utility model should be within the scope of protection of this utility model.

Claims

1. A liquid leak detection and drainage system, comprising: Water-blocking strip (1), the water-blocking strip (1) is arranged on the floor (100) in the centralized area of ​​the fire extinguishing system, and the water-blocking strip (1) and the floor (100) form a closed liquid accumulation area; At least two leak detection components (2), each leak detection component (2) including at least an upper leak detection component (2B) and a lower leak detection component (2A), are arranged vertically on the inner wall of the water-blocking strip (1), wherein the two leak detection components (2) are arranged parallel to the floor (100), the lower leak detection component (2A) is arranged at the position where the water-blocking strip (1) contacts the floor (100), and the upper leak detection component (2B) is arranged at a height (H) of the water-blocking strip (1) from the floor (100), the height (H) being less than or equal to the height of the water-blocking strip (1); Drainage bar (5), said drainage bar (5) being arranged outside the aircraft; and At least one drain pipe (3) is arranged between the liquid accumulation area and the drain rod (5).

2. The liquid leak detection and drainage system according to claim 1, characterized in that, The leakage detection component (2) includes: A sleeve (21) is made of insulating material; An insulating support is arranged inside the sleeve (21); An upper metal wire (24) is arranged parallel to the upper part of the sleeve (21); and A lower metal wire (25) is arranged parallel to the sleeve (21) at the lower part of the sleeve (21) and below the upper metal wire (24). The upper metal wire (24) and the lower metal wire (25) are separated by the insulating support and are supported and installed in the sleeve (21) by the support. An opening is provided on the lower wall of the sleeve (21).

3. The liquid leak detection and drainage system according to claim 2, characterized in that, The opening is a strip groove (22).

4. The liquid leak detection and drainage system according to claim 1, characterized in that, The height of the water-blocking strip (1) is greater than the height (H) of the temporary liquid accumulation that can be allowed.

5. The liquid leak detection and drainage system according to claim 2, characterized in that, The insulating support is at least two insulating cables (23), which are arranged opposite to each other to separate the upper metal wire (24) from the lower metal wire (25).

6. The liquid leak detection and drainage system according to claim 2, characterized in that, The leakage detection component (2) further includes a sealing end (26), which is arranged at both ends of the sleeve (21) and is provided with a vent hole (27).

7. The liquid leak detection and drainage system according to claim 2, characterized in that, The leakage detection component (2) also includes a cable connector (6) that connects the leakage detection component (2) to the alarm system.

8. The liquid leak detection and drainage system according to claim 1, characterized in that, A heating device is provided at the drain rod (5).

9. The liquid leak detection and drainage system according to claim 1, characterized in that, It includes at least two drain pipes (3), wherein the drain pipes (3) are respectively arranged at the rear of the water deflectors (1) arranged on the left and right sides along the flight direction of the aircraft.

10. The liquid leak detection and drainage system according to claim 1, characterized in that, It also includes at least one check valve (4), which is disposed on the drain pipe (3).

Images