A hydrant leakage alarm detection device

Abstract

The application relates to a fire hydrant water leakage alarm detection device for detecting the water leakage of a fire hydrant body, which is applied to the technical field of fire-fighting detection equipment and comprises a box body, a partition plate is arranged in the box body, the partition plate divides the box body into a containing cavity and a detection cavity, a water permeation opening is arranged on the partition plate and penetrates through the partition plate, the water permeation opening is connected with the containing cavity and the detection cavity, the fire hydrant body is arranged in the containing cavity, a detection assembly and a water blocking assembly are arranged in the detection cavity, the detection assembly is used for detecting the water accumulation in the detection cavity, and the water blocking assembly is arranged on the detection assembly; a warning assembly is arranged in the containing cavity, and the warning assembly is signal-connected with the detection assembly. The application has the effect that when water leaks, water flows into the detection cavity through the water permeation opening, the detection assembly detects the water level signal to control the warning assembly to issue an alarm. In the process, the water blocking assembly is arranged on the detection assembly, so that the water flowing into the detection cavity through the water permeation opening is not easy to splash on the detection assembly, so as to prevent false detection and improve the detection accuracy.

Description

Technical Field

[0001] This application relates to the technical field of fire protection testing equipment, and in particular to a fire hydrant leakage alarm detection device. Background Technology

[0002] Fire hydrants generally refer to the common fire hydrants found in the market; they are a type of fixed fire-fighting facility. A significant portion of fire trucks do not carry water and must be used in conjunction with fire trucks. However, some fire trucks have limited water capacity and urgently need to find a water source during firefighting operations. In these situations, fire hydrants serve to supply water.

[0003] However, in real life, fire hydrants are easily damaged and leak. During a fire, these hydrants cannot function properly, seriously threatening the smooth progress of firefighting efforts. Therefore, it is urgent to install detection devices on fire hydrants. Whenever a fire hydrant leaks or experiences insufficient pressure, the detection device will sound an alarm, reminding staff to carry out timely repairs.

[0004] Related technologies provide a fire hydrant detection device, such as the fire hydrant leakage monitoring device disclosed in Chinese Patent No. CN108653967B, which includes a sensor module, a control module, a communication module, and a power supply module; the sensor module, communication module, and power supply module are integrated into a fire hydrant leakage monitoring and automatic location alarm device, which is installed at the fire hydrant interface.

[0005] The sensor module is a liquid level sensor. The liquid level sensor sends the water leakage information and the corresponding fire hydrant number to the ZigBee coordinator through the communication module. The ZigBee coordinator serves as the data processing center and uses the sensor to convert the signal into an electrical signal, which is then converted into geographic coordinates and audio signals.

[0006] Leak detection agencies in related technologies use liquid level sensors to detect leaks in fire hydrants. However, the liquid level sensors in these technologies are installed inside the fire hydrant. This installation method causes the liquid level sensor to come into contact with water during normal use of the fire hydrant, resulting in false signals. Consequently, staff cannot accurately determine whether the fire hydrant is leaking or in normal use. Summary of the Invention

[0007] To address the issue of false signals generated by leak detection mechanisms in fire hydrants that rely on level sensors installed inside the hydrant during normal use, this application provides a fire hydrant leak alarm detection device.

[0008] The fire hydrant leakage alarm detection device provided in this application adopts the following technical solution:

[0009] A fire hydrant leakage alarm detection device is used to detect leakage in the fire hydrant body. It includes a box, and a partition plate is provided inside the box to divide the box into a receiving cavity and a detection cavity. A water inlet is provided through the partition plate, and the water inlet connects the receiving cavity and the detection cavity.

[0010] The fire hydrant body is located in the receiving cavity. The detection cavity is equipped with a detection component and a water-blocking component. The detection component is used to detect the water accumulation in the detection cavity, and the water-blocking component covers the detection component.

[0011] The cavity is equipped with an alarm component, which is signal-connected to the detection component.

[0012] By adopting the above technical solution, once water seepage occurs in the fire hydrant body, the leaked water will flow into the detection chamber through the water outlet on the partition plate. The detection component in the detection chamber will detect the water seepage signal, convert the water seepage signal into an electrical signal and transmit it to the alarm component, which will then control the alarm component to issue an alarm and notify relevant personnel to carry out timely maintenance.

[0013] During this process, the water-blocking component always covers the detection component, preventing leaked water from dripping onto the detection component, reducing the possibility of false detections of the object, and thus improving the accuracy of the detection.

[0014] Optionally, the detection assembly includes a liquid level sensor and a water immersion sensor. The liquid level sensor is installed on the side wall of the detection chamber, and the water immersion sensor is installed on the bottom wall of the detection chamber. A timer and a battery are provided on the inner wall of the receiving chamber. The liquid level sensor, the water immersion sensor, and the timer are all electrically connected to the battery, and the liquid level sensor and the water immersion sensor are both signal-connected to the timer.

[0015] By adopting the above technical solution, the water immersion sensor is installed on the bottom wall of the detection chamber. Once water enters the detection chamber, the water immersion sensor will be soaked and a seepage signal will be obtained. The liquid level sensor is installed on the side wall of the detection chamber. The liquid level sensor will only be triggered when the water level inside the detection chamber reaches the height of the liquid level sensor. A timer records the time required from when the water immersion sensor detects water to when the liquid level sensor detects the liquid level information, thereby calculating the leakage water flow rate and determining the severity of the fire hydrant seepage.

[0016] Optionally, the water-blocking assembly includes a water-blocking plate disposed within the receiving cavity. The top end of the water-blocking plate is fixed to the inner wall of the receiving cavity, and a flow gap is left between the bottom end of the water-blocking plate and the bottom wall of the receiving cavity. A water-avoiding zone is formed between the water-blocking plate and the side wall of the receiving cavity, and both the liquid level sensor and the water immersion sensor are located in the water-avoiding zone.

[0017] By adopting the above technical solution, the baffle plate is installed on the liquid level sensor and the water immersion sensor, which reduces the possibility of water leakage dripping onto the liquid level sensor and causing the liquid level sensor to issue false signals, thereby improving the detection accuracy.

[0018] Water that leaks into the detection chamber flows into the water-avoiding zone through the flow gap. As the water level in the detection chamber rises, the water flow gradually submerges the water immersion sensor and the liquid level sensor, thus obtaining information about the rising water level.

[0019] Optionally, the warning component includes an information processor, a buzzer, and a warning light installed in the receiving cavity. The buzzer, information processor, and warning light are all electrically connected to the battery. The warning light and the buzzer are both signal-connected to the information processor. The information processor is signal-connected to the timer. The warning light is linked to the water immersion sensor signal.

[0020] By employing the above technical solution, the information processor receives the time signal transmitted by the timer to determine the rate of water level rise. If the water level rises slowly, only a warning light illuminates, reminding staff to inspect the fire hydrant. If the water level rises rapidly, it indicates a significant leak in the fire hydrant, which could lead to substantial water waste if not addressed promptly. In this case, a buzzer sounds to notify staff for emergency repairs.

[0021] Optionally, the bottom wall of the detection chamber is provided with an inclined block, the box body is connected to a drain pipe, the drain pipe is connected to the detection chamber, and the water immersion sensor is installed on the side of the box body near the drain pipe. Water that seeps into the detection chamber flows into the drain pipe under the guidance of the inclined block.

[0022] The detection chamber is equipped with a sealing component and a control component for controlling the opening and closing of the sealing component. The sealing component is adapted to seal the drain pipe.

[0023] By employing the above technical solution, an inclined block is installed inside the detection chamber to guide the flow, ensuring that all water leaking into the chamber is collected at the water immersion sensor and detected. In the initial stage of seepage, the control component keeps the sealing component closed, causing the water level in the detection chamber to rise with the inflow of water, thus recording the rate of rise. Once the rate of rise has been detected, the control component opens the sealing component, draining the accumulated water from the chamber and reducing the possibility of water overflowing into the stairwell.

[0024] Optionally, the sealing assembly includes a sealing plate disposed in the detection chamber, the sealing plate being adapted to the inlet of the drain pipe, and a torsion spring being provided between the sealing plate and the drain pipe, one end of the torsion spring being fixed to the sealing plate and the other end being fixed to the inner wall of the drain pipe.

[0025] By adopting the above technical solution, the sealing plate blocks the drain outlet under the pressure of the torsion spring, making it difficult for water in the detection chamber to be discharged during the detection process, thus reducing the impact of water seepage on the judgment of seepage volume.

[0026] Optionally, the control component includes a control motor disposed in the receiving cavity, the control motor being signal-connected to the information processor, a winding roller being disposed on the output shaft of the control motor, a traction rope being wound on the winding roller, one end of the traction rope being fixed to the winding roller, and a counterweight being connected to the other end, and a limiting groove being disposed on the drain pipe for accommodating the counterweight, and after the counterweight falls into the limiting groove, it pushes the sealing plate to the open state.

[0027] By adopting the above technical solution, the information processor receives the time signal from the timer and quickly analyzes it to determine the water leakage situation of the fire hydrant. Then, the control motor receives the electrical signal from the information processor and drives the winding roller to rotate. The winding roller releases the traction rope, causing the counterweight to fall into the limiting groove and press the sealing plate against the inner wall of the drain pipe, thus opening the drain pipe.

[0028] Optionally, the inclined surface is coated with a hydrophobic coating, which solidifies to form a hydrophobic layer.

[0029] By adopting the above technical solution, a hydrophobic coating is applied to the inclined surface to form a hydrophobic layer. After the leaking water droplets fall onto the hydrophobic layer, they will flow directly to the water immersion sensor and be detected by the water immersion sensor, which effectively reduces the possibility that the water seepage is not easily detected when the seepage flow is small.

[0030] Optionally, the side wall of the housing is provided with a through groove for the partition plate to pass through, the partition plate is placed into the housing through the through groove, and the partition plate is installed in the housing by a snap-fit ​​assembly;

[0031] The snap-fit ​​assembly includes a snap-fit ​​guide rail disposed inside the housing. The snap-fit ​​guide rail is fixed on the inner wall of the housing. The snap-fit ​​guide rail is provided with a snap-fit ​​groove along its own extension direction. The partition plate is adapted to be inserted into the snap-fit ​​groove.

[0032] By adopting the above technical solution, the partition plate can be inserted into or removed from the box at any time through the through groove, which makes it convenient for staff to remove the partition plate during later maintenance to inspect and clean the liquid level sensor and water immersion sensor inside the detection chamber.

[0033] Optionally, a sealing ring is provided on one side of the partition plate, the sealing ring is arranged along the periphery of the partition plate, and the sealing ring abuts against the inner wall of the through groove after the partition plate is inserted into the box body.

[0034] By adopting the above technical solution, after the partition plate is inserted into the box, the sealing ring abuts against the inner wall of the through groove, so that when water seeps into the cavity, the water flow is not easy to flow out from the through groove, reducing the situation where water flows directly out from the through groove and causes water accumulation in the building corridor.

[0035] In summary, this application includes at least one of the following beneficial technical effects:

[0036] 1. When water leaks, water flows into the detection chamber through the water inlet. The detection component detects the water level signal and controls the alarm component to issue an alarm. During this process, the water-blocking component covers the detection component, preventing water flowing into the detection chamber through the water inlet from splashing onto the detection component, thus preventing false detections and improving detection accuracy.

[0037] 2. The water immersion sensor is installed on the bottom wall of the detection chamber. Once water enters the detection chamber, the water immersion sensor will be soaked and a seepage signal will be obtained. The liquid level sensor is installed on the side wall of the detection chamber. The liquid level sensor will only be triggered when the water level inside the detection chamber reaches the height of the liquid level sensor. A timer records the time required from when the water immersion sensor detects water to when the liquid level sensor detects the liquid level information, thereby calculating the leakage water flow rate and judging the severity of the fire hydrant seepage.

[0038] 3. After receiving the time signal from the timer, the information processor quickly analyzes the time signal to determine the water leakage situation of the fire hydrant. Then, the control motor receives the electrical signal from the information processor and drives the winding roller to rotate. The winding roller releases the traction rope, causing the counterweight to fall into the limit groove and press the sealing plate against the inner wall of the drain pipe, thus opening the drain pipe. Attached Figure Description

[0039] Figure 1 This is a schematic diagram of the fire hydrant leakage alarm detection device in the embodiments of this application.

[0040] Figure 2 This is a cross-sectional view of the fire hydrant leakage alarm detection device in the embodiments of this application.

[0041] Figure 3 This is a schematic diagram of the fire hydrant leakage alarm detection device from another perspective in the embodiments of this application.

[0042] Figure 4 yes Figure 2 Enlarged view of part A in the middle.

[0043] Reference numerals: 1. Fire hydrant body; 2. Box; 21. Receiving cavity; 22. Detection cavity; 23. Through groove; 3. Divider plate; 31. Water inlet; 4. Detection component; 41. Liquid level sensor; 42. Water immersion sensor; 5. Water blocking component; 51. Water baffle; 6. Warning component; 61. Information processor; 62. Buzzer; 63. Warning light; 7. Battery; 8. Control component; 81. Control motor; 82. Winding roller; 83. Traction rope; 84. Counterweight; 9. Sealing component; 91. Sealing plate; 92. Torsion spring; 10. Flow gap; 11. Water-avoiding zone; 12. Inclined block; 13. Drainage layer; 14. Drain pipe; 141. Limiting groove; 15. Snap-fit ​​component; 151. Snap-fit ​​guide rail; 1511. Snap-fit ​​groove; 16. Sealing ring; 17. Timer. Detailed Implementation

[0044] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0045] This application discloses a fire hydrant leakage alarm detection device.

[0046] Reference Figure 1 and Figure 2 A fire hydrant leakage alarm detection device is disclosed, primarily used for detecting leaks in indoor fire hydrants installed in building corridors. The device includes a housing 2, which is embedded in the wall of the building corridor. A partition plate 3 is installed inside the housing 2 via a snap-fit ​​assembly 15, dividing the interior of the housing 2 into a receiving cavity 21 and a detection cavity 22. The fire hydrant body 1, water supply pipe, and nozzle are all housed in the receiving cavity 21.

[0047] The partition plate 3 is provided with several water inlets 31, which connect the receiving cavity 21 and the detection cavity 22. If water leaks from the fire hydrant body 1 in the receiving cavity 21, the leaked water will flow through the water inlets 31 into the detection cavity 22, promptly draining the accumulated water from the receiving cavity 21. This effectively reduces the risk of water accumulating in the receiving cavity 21 and soaking the fire hydrant body 1, thus preventing corrosion.

[0048] Reference Figure 1 The side wall of the box 2 is provided with a through groove 23 for the partition plate 3 to pass through. The partition plate 3 can be inserted into or removed from the box 2 through the through groove 23 so that the operator can clean the partition plate 3 and reduce the blockage of the water inlet 31 on the partition plate 3, which would lead to poor drainage.

[0049] Reference Figure 1 and Figure 2The snap-fit ​​assembly 15 includes a snap-fit ​​guide rail 151 disposed inside the housing 2, with the side of the snap-fit ​​guide rail 151 welded to the inner wall of the housing 2. The snap-fit ​​guide rail 151 has a snap-fit ​​groove 1511 along its own extension direction. After the partition plate 3 is inserted into the housing 2 through the through groove 23, it is adapted to be inserted into the snap-fit ​​groove 1511, thus completing the detachable fixing of the partition plate 3.

[0050] Reference Figure 1 In addition, a sealing ring 16 is provided at one end of the partition plate 3 along its periphery. After the partition plate 3 is inserted into the snap-fit ​​groove 1511, the sealing ring 16 abuts against the inner wall of the through groove 23, sealing the gap between the partition plate 3 and the inner wall of the through groove 23. Even if leakage occurs at the fire hydrant body 1, the water flow will not easily overflow into the building corridor through the through groove 23.

[0051] Reference Figure 2 and Figure 3 In order to facilitate real-time monitoring of whether the fire hydrant body 1 is leaking, this application provides a detection component 4 in the detection chamber 22 and an alarm component 6 in the receiving chamber 21. The alarm component 6 is connected to the detection component 4 by signal.

[0052] Specifically, the detection assembly 4 includes a liquid level sensor 41 and a water immersion sensor 42 installed in the detection chamber 22. The liquid level sensor 41 is installed on the side wall of the detection chamber 22 near the partition plate 3, and the water immersion sensor 42 is installed on the bottom wall of the detection chamber 22.

[0053] The cavity 21 contains a timer 17 and a battery 7. Both the timer 17 and the battery 7 are mounted on the inner wall of the housing. The liquid level sensor 41 and the water immersion sensor 42 are both connected to the timer 17. The timer 17, the liquid level sensor 41, and the water immersion sensor 42 are all electrically connected to the battery 7.

[0054] Once the fire hydrant body 1 leaks, the leaked water will flow into the detection chamber 22 through the water inlet 31. Once the water immersion sensor 42 in the detection chamber 22 detects water, it will receive information about the fire hydrant body 1 leaking water, and at this time the timer 17 will start timing.

[0055] The liquid level sensor 41 is set up to monitor the water level inside the detection chamber 22 in real time. When the liquid level sensor 41 comes into contact with the water surface, the timer 17 stops timing, thereby calculating the flow rate of the seepage and determining whether personnel need to arrive immediately to carry out emergency repairs.

[0056] Reference Figure 2Furthermore, in order to ensure that the water dripping into the detection chamber 22 can be detected by the water immersion sensor 42 as soon as possible, in this embodiment of the application, a wedge block 12 is provided in the detection chamber 22. The wedge block 12 is integrally formed with the shell. The surface of the wedge block 12 is coated with a hydrophobic coating. After the hydrophobic coating solidifies, a hydrophobic layer 13 will be formed. The water drips onto the hydrophobic layer 13 and then flows to the water immersion sensor 42 under the guidance of the wedge block 12, effectively reducing the situation where the water immersion sensor 42 cannot detect the water seepage in time when the seepage flow is small.

[0057] Reference Figure 2 In addition, in order to reduce the possibility of water leakage accidentally dripping onto the liquid level sensor 41 and causing the liquid level sensor 41 to issue false signals, a water blocking component 5 is provided in the detection cavity 22 in this embodiment. The water blocking component 5 includes a water blocking plate 51, which adopts an inverted L-shaped structure and covers the liquid level sensor 41, reducing the possibility of the liquid level sensor 41 issuing false signals.

[0058] Specifically, the top of the baffle plate 51 is snapped and fixed to the side wall of the detection chamber 22, and a water-avoiding zone 11 for accommodating the liquid level sensor 41 is formed between the baffle plate 51 and the side wall of the detection chamber 22. A flow gap 10 for water to flow through is formed between the bottom of the baffle plate 51 and the bottom wall of the accommodating chamber 21. Water flows from bottom to top into the water-avoiding zone 11 through the flow gap 10.

[0059] Reference Figure 1 and Figure 3 Specifically, the warning assembly 6 includes a buzzer 62 and a warning light 63 mounted on the side wall of the housing. An information processor 61 is mounted on the inner wall of the receiving cavity 21. The buzzer 62, warning light 63, and timer 17 are all signal-connected to the information processor 61. The warning light 63 is also signal-connected to the water immersion sensor 42. The buzzer 62, warning light 63, and information processor 61 are all electrically connected to the battery 7. The information processor 61 in this application is a microcontroller.

[0060] Reference Figure 2 and Figure 3 During actual testing, once the water immersion sensor 42 detects water, it immediately activates the warning light 63, indicating that the fire hydrant body 1 is leaking. At the same time, the timer 17 records the time it takes for the water level to rise from the water immersion sensor 42 to the level sensor 41, and then transmits the time signal to the information processor 61. The information processor 61 calculates the seepage flow rate based on the time signal.

[0061] When the flow rate is high, staff need to be notified to carry out emergency repairs in time. At this time, the information processor 61 controls the buzzer 62 to sound and issue an alarm. When the flow rate is low, the information processor 61 only controls the warning light 63 to light up. If no one is inspected after a period of time, the buzzer 62 will be controlled to sound an alarm, thus realizing intelligent monitoring.

[0062] Reference Figure 2 and Figure 4 Furthermore, to reduce the possibility of leakage from the fire hydrant body 1 into the building corridors and affecting residents' lives, a drain pipe 14 is provided on the shell in this embodiment, and the drain pipe 14 is connected to the bottom wall of the receiving cavity 21. The drain pipe 14 in this embodiment is a steel pipe with a square cross-section.

[0063] Reference Figure 2 and Figure 4 A sealing component 9 is provided in the receiving cavity 21 at the drain pipe 14 to seal the drain pipe 14. The receiving cavity 21 is also provided with a control component 8 to control the opening and closing of the sealing component 9, and the control component 8 is connected to the information processor 61 by signal.

[0064] Specifically, the sealing assembly 9 includes a sealing piece 91, which is hinged to the bottom wall of the receiving cavity 21. A torsion spring 92 is also provided inside the drain pipe 14. One end of the torsion spring 92 is welded to the sealing piece 91, and the other end is welded to the inner wall of the drain pipe 14. Under the pressure of the torsion spring 92, the sealing piece 91 adapts to seal the drain pipe 14.

[0065] Reference Figure 2 and Figure 3 The control component 8 includes a control motor 81 mounted on the inner wall of the receiving cavity 21, and the control motor 81 is connected to the information processor 61 via signal. A winding roller is coaxially fixed on the output shaft of the control motor 81, and a traction rope 83 is wound on the winding roller. One end of the traction rope 83 is fixed to the winding roller, and the other end is connected to a counterweight 84. The counterweight 84 is located directly above the sealing plate 91. Whenever the information processor 61 receives a time signal sent by the timer 17, it simultaneously controls the control motor 81 to start. The output shaft of the control motor 81 rotates, driving the winding roller 82 to rotate, causing the counterweight 84 to fall into the drain pipe 14 and push the sealing plate to a downward flipped state, draining the water accumulated in the detection cavity 22.

[0066] Reference Figure 2 Furthermore, in order to reduce the shaking of the counterweight 84 caused by the impact of water flow, a limiting groove 141 for inserting the counterweight 84 is provided in the drain pipe 14 in this embodiment. After the bottom end of the counterweight 84 is inserted into the limiting groove 141, the side wall of the counterweight 84 abuts against the inner wall of the limiting groove 141. Under the impact of water flow, the counterweight 84 is not easy to shake, reducing the situation where the displacement of the counterweight 84 affects the drainage speed of the drain pipe 14.

[0067] Meanwhile, the bottom end of the counterweight 84 is inserted into the limiting groove 141, which effectively reduces the area occupied by the counterweight 84 in the drain pipe 14, and further reduces the impact of setting the counterweight 84 on the drainage volume of the drain pipe 14.

[0068] The implementation principle of the fire hydrant leakage alarm detection device in this application embodiment is as follows: once the fire hydrant body 1 leaks water, the leaked water will flow into the detection chamber 22 through the water inlet 31 on the partition plate 3. The detection component 4 in the detection chamber 22 detects the leakage signal, converts the leakage signal into an electrical signal and transmits it to the alarm component 6, which controls the alarm component 6 to issue an alarm and notify relevant personnel to carry out timely maintenance.

[0069] During this process, the water-blocking component 5 is always covered on the detection component 4, so that leaked water is not easy to drip onto the detection component 4, reducing the possibility of false detection of the object and thus improving the detection accuracy.

[0070] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A fire hydrant leakage alarm detection device, used for detecting leakage in the fire hydrant body (1), characterized in that: Includes a housing (2), the housing (2) is provided with a partition plate (3), the partition plate (3) divides the housing (2) into a receiving cavity (21) and a detection cavity (22), and a water inlet (31) is provided through the partition plate (3), the water inlet (31) connecting the receiving cavity (21) and the detection cavity (22); The fire hydrant body (1) is located in the receiving cavity (21). The detection cavity (22) is provided with a detection component (4) and a water-blocking component (5). The detection component (4) is used to detect the water accumulation in the detection cavity (22). The water-blocking component (5) covers the detection component (4). The cavity (21) is provided with an alarm component (6), which is signal-connected to the detection component (4); The detection component (4) includes a liquid level sensor (41) and a water immersion sensor (42). The liquid level sensor (41) is installed on the side wall of the detection cavity (22), and the water immersion sensor (42) is installed on the bottom wall of the detection cavity (22). A timer (17) and a battery (7) are provided on the inner wall of the receiving cavity (21). The liquid level sensor (41), the water immersion sensor (42) and the timer (17) are all electrically connected to the battery (7). The liquid level sensor (41) and the water immersion sensor (42) are both signal connected to the timer (17). The water-blocking assembly (5) includes a water-blocking plate (51) disposed in the receiving cavity (21). The top end of the water-blocking plate (51) is fixed on the inner wall of the receiving cavity (21). A flow gap (10) is left between the bottom end of the water-blocking plate (51) and the bottom wall of the receiving cavity (21). A water-avoiding zone (11) is formed between the water-blocking plate (51) and the side wall of the receiving cavity (21). The liquid level sensor (41) and the water immersion sensor (42) are both located in the water-avoiding zone (11). The bottom wall of the detection chamber (22) is provided with an inclined block (12), and the box (2) is connected to a drain pipe (14). The drain pipe (14) is connected to the detection chamber (22). The water immersion sensor (42) is installed on the side of the box (2) near the drain pipe (14). Water that seeps into the detection chamber (22) flows into the drain pipe (14) under the guidance of the inclined block (12). The detection chamber (22) is provided with a sealing component (9) and a control component (8) for controlling the opening and closing of the sealing component (9). The sealing component (9) is adapted to seal the drain pipe (14).

2. The fire hydrant leakage alarm detection device according to claim 1, characterized in that: The warning component (6) includes an information processor (61), a buzzer (62), and a warning light (63) installed in the receiving cavity (21). The buzzer (62), the information processor (61), and the warning light (63) are all electrically connected to the battery (7). The warning light (63) and the buzzer (62) are both signal-connected to the information processor (61). The information processor (61) is signal-connected to the timer (17). The warning light (63) is signal-linked to the water immersion sensor (42).

3. The fire hydrant leakage alarm detection device according to claim 2, characterized in that: The sealing assembly (9) includes a sealing piece (91) disposed in the detection chamber (22), the sealing piece (91) is adapted to the inlet of the drain pipe (14), and a torsion spring (92) is provided between the sealing piece (91) and the drain pipe (14). One end of the torsion spring (92) is fixed on the sealing piece (91), and the other end is fixed on the inner wall of the drain pipe (14).

4. The fire hydrant leakage alarm detection device according to claim 3, characterized in that: The control component (8) includes a control motor (81) located in the receiving cavity (21). The control motor (81) is connected to the information processor (61) via a signal. A winding roller is provided on the output shaft of the control motor (81). A traction rope (83) is wound on the winding roller. One end of the traction rope (83) is fixed on the winding roller, and a counterweight (84) is connected to the other end. A limiting groove (141) is provided on the drain pipe (14) for the counterweight (84) to be accommodated. After the counterweight (84) falls into the limiting groove (141), it pushes the sealing piece (91) to the open state.

5. The fire hydrant leakage alarm detection device according to claim 4, characterized in that: The inclined surface is coated with a hydrophobic coating, which solidifies to form a hydrophobic layer (13). When the hydrophobic coating is applied to the inclined surface and a hydrophobic layer is formed, the leaked water droplets will flow directly to the water immersion sensor and be detected by the water immersion sensor after they fall onto the hydrophobic layer, which effectively reduces the possibility that the water seepage is not easily detected when the seepage flow is small.

6. The fire hydrant leakage alarm detection device according to claim 1, characterized in that: The side wall of the box (2) is provided with a through groove (23) for the partition plate (3) to pass through. The partition plate (3) is placed into the box (2) through the through groove (23). The partition plate (3) is installed in the box (2) by a snap-fit ​​assembly (15). The snap-fit ​​assembly (15) includes a snap-fit ​​guide rail (151) disposed inside the housing (2). The snap-fit ​​guide rail (151) is fixed on the inner wall of the housing (2). The snap-fit ​​guide rail (151) is provided with a snap-fit ​​groove (1511) along its own extension direction. The partition plate (3) is adapted to be inserted into the snap-fit ​​groove (1511).

7. The fire hydrant leakage alarm detection device according to claim 6, characterized in that: A sealing ring (16) is provided on one side of the partition plate (3). The sealing ring (16) is arranged along the periphery of the partition plate (3). After the partition plate (3) is inserted into the box body (2), the sealing ring (16) abuts against the inner wall of the through groove (23).

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