Underground power distribution room flood prevention system and control method

Abstract

The invention relates to the field of underground flood prevention, and discloses an underground power distribution room flood prevention system and a control method.The underground power distribution room flood prevention system comprises a drainage device and a monitoring system, and the drainage device comprises a baffle, a synchronous gear, an arc-shaped guide rail groove, a gear groove, a water swelling strip and a dual-drive redundancy mechanism; the monitoring system comprises a liquid level sensor group, a microprocessor, a wireless communication module and a signal dual-verification mechanism, the dual-drive redundant mechanism comprises a gravity balancing weight, a hydraulic energy storage cylinder and an electromagnetic locking mechanism, the electromagnetic locking mechanism locks the balancing weight during normal power supply and releases the balancing weight during power failure or main drive failure, and the hydraulic energy storage cylinder is connected with the electromagnetic locking mechanism. The baffle is pulled to rise along the arc-shaped guide rail groove through gravity. The dual-drive redundant mechanism is automatically started during power failure and motor failure, the baffle is lifted through a pure mechanical structure, the risk that a traditional electric system fails after power failure is avoided, and the safety of the system is improved.

Description

Technical Field

[0001] The present invention relates to the field of underground flood prevention, and in particular to a flood prevention system and a control method for an underground power distribution room. Background Art

[0002] As cities continue to expand and populations continue to gather, land resources are becoming increasingly precious. In order to save ground space and reduce interference with residents' lives, many power facilities are placed underground. Underground distribution rooms undertake the key functions of power distribution and conversion, and are the core hub of the city's power supply system. However, this layout exposes many serious defects and hidden dangers when facing natural disasters such as typhoons, floods, and heavy rains. Without strong flood prevention measures, underground power facilities are extremely susceptible to flooding, which in turn directly affects the normal power supply to public areas. Moreover, due to the difficulty of underground drainage, power repairs can only be carried out after the accumulated water recedes, which greatly prolongs the time for power repairs and restoration after the disaster, and may also cause problems with drainage, communications, and other resource supplies;

[0003] Traditional flood prevention technology in underground distribution rooms has many shortcomings. In terms of monitoring and control systems, common single-point liquid level switches can only detect specific water points and cannot continuously monitor water level trends. When the water level is in a critical state, there is a high risk of missed reports. At the same time, existing flood control baffles are mainly driven by motors. Once a power outage occurs due to a flood, or the motor itself fails, the baffles cannot be raised, creating a dangerous situation of "power failure means loss of protection". It is difficult to play a flood prevention role at critical moments, and manual operation also poses personnel safety risks. Summary of the Invention

[0004] In order to make up for the above shortcomings, the present invention provides an underground distribution room flood prevention system and control method, aiming to improve the problem that the monitoring system cannot continuously monitor the water level change trend and the dangerous situation of the baffle "losing protection when the power is cut off", thereby solving the problems existing in the above-mentioned background technology.

[0005] To achieve the above-mentioned object, the present invention adopts the following technical solution: a flood control system for an underground power distribution room, comprising a drainage device and a monitoring system, characterized in that: the drainage device comprises a baffle, a synchronous gear, an arc-shaped guide rail groove, a water-expanding waterstop strip, and a dual-drive redundant mechanism;

[0006] The baffle is a hidden flexible flood-proof metal baffle, which is set in the arc-shaped guide groove of the concrete bottom plate at the entrance of the underground distribution room. The synchronous gear drives the rack at the bottom of the baffle to make the baffle move up and down in an arc along the arc-shaped guide groove. The arc-shaped guide groove provides mechanical support and movement guidance for the baffle. The bottom of the baffle is provided with a rack structure that matches the synchronous gear. The water-expanding waterstop strips are embedded in the guide grooves on both sides of the baffle.

[0007] The monitoring system includes a liquid level sensor group, a microprocessor, a wireless communication module and a signal dual verification mechanism. The liquid level sensor group is arranged at the upper, middle and lower limit positions in the rainwater collection well for real-time monitoring of the water level. The microprocessor communicates with the liquid level sensor group and outputs control instructions according to the water level signal. The wireless communication module is used to transmit the monitoring data to a remote server or administrator terminal. The sensor inside the signal dual verification mechanism is connected to the wired signal and the wireless signal at the same time. The two signals are transmitted independently to the microprocessor. When the wired signal is interrupted but the wireless signal is normal, a local alarm is triggered. When the two signals are interrupted at the same time, it is forcibly judged as an abnormal state and a global alarm is triggered.

[0008] As a further description of the above technical solution:

[0009] The dual-drive redundant mechanism includes a gravity counterweight, a hydraulic energy storage cylinder and an electromagnetic locking mechanism. The counterweight is connected to the lifting lug on the baffle through a steel wire rope. The electromagnetic locking mechanism locks the counterweight when the power is normally supplied, and releases the counterweight when the power is cut off or the main drive fails. The baffle is pulled up along the arc guide rail groove by gravity, and the hydraulic energy storage cylinder provides buffer damping.

[0010] As a further description of the above technical solution:

[0011] The counterweight block is located in the underground foundation pit near the door of the distribution room, at the same height as the bottom of the baffle. The hydraulic energy storage cylinder is installed at the side connection between the baffle and the arc guide rail groove. The electromagnetic locking mechanism is installed on the wall of the distribution room at the side end of the arc guide rail groove and is connected to the microprocessor through a waterproof cable.

[0012] As a further description of the above technical solution:

[0013] The drainage device also includes a cable trench, a rainwater collection trough and a rainwater collection well. The rainwater collection trough is arranged at the bottom of the cable trench, and the rainwater collection trough is connected to the rainwater collection well. A drainage pump is arranged in the rainwater collection well. The drainage pump is a variable frequency pump, which automatically adjusts the speed according to the liquid level sensor signal. It runs at low power when the water level is low and runs at full power or overclocking when the water level is high.

[0014] As a further description of the above technical solution:

[0015] The monitoring system also includes a historical data trend analysis module for recording and analyzing historical water levels, pump operating hours, damper opening and closing times and other data, generating trend charts and predicting water accumulation patterns, and adjusting drainage strategies in advance.

[0016] As a further description of the above technical solution:

[0017] A metal protective cover to prevent accidental touch is provided on the outside of the liquid level sensor. The metal protective cover to prevent accidental touch is a hollow structure and has an inclined arc to prevent sediment accumulation.

[0018] A control method for a flood prevention system in an underground distribution room comprises the following steps:

[0019] S1: Real-time monitoring stage: The elevation of the cable trench in the underground power distribution room is lower than that of the surrounding rainwater drainage ditches and sewage ditches. Rainwater in the cable trench flows into the rainwater collection trough and collects in the rainwater collection well. The liquid level sensor group monitors the water level in the rainwater collection well in real time. When the water level reaches the lower limit, the microprocessor outputs instruction 1 to start the first drainage pump; when the water level reaches the middle limit, it outputs instruction 2 to start the second drainage pump and raise the baffle; when the water level reaches the upper limit, it outputs instruction 3 to cut off the main power supply of the power distribution room, start the backup power supply, and drain the water at full power, while sending an alarm message to the administrator terminal.

[0020] S2: Dual-drive switching stage: When the microprocessor outputs instruction 1 and the power supply is normal, the servo motor drives the baffle to open and close. When a power outage or main drive failure is detected, the electromagnetic locking mechanism releases the gravity counterweight block, and gravity pulls the baffle up. The hydraulic energy storage cylinder controls the lifting speed and provides a buffer. After the baffle is fully opened, the water-expanding waterstop strips embedded in the arc-shaped slide grooves on both sides expand when exposed to water to seal, ensuring that it can withstand floods and no leakage;

[0021] S3: Signal verification stage: The microprocessor verifies the sensor's wired and wireless signals in real time. When the signal is abnormal, an alarm or emergency response is triggered according to the preset logic.

[0022] As a further description of the above technical solution:

[0023] After the drainage pump is started, if the pumping rate is greater than the water intrusion flow rate and the water level drops below the lower limit, the drainage pump will be shut down according to the set delay. If the pumping rate is less than the water intrusion flow rate, the standby pump and baffle will be started in sequence to form double flood prevention protection.

[0024] As a further description of the above technical solution:

[0025] The monitoring system continuously outputs negative signals under normal conditions and positive signals under abnormal conditions. When the communication line is damaged and the signal is interrupted, the system is forced to maintain a positive signal and trigger an alarm to avoid silent omissions.

[0026] The present invention has the following beneficial effects:

[0027] 1. In the present invention, first, when the dual-drive redundant mechanism detects a power outage or a main drive failure, the electromagnetic locking mechanism is powered off and unlocked, the counterweight block falls due to its own weight, and the baffle is pulled up along the guide rail by the wire rope. The energy storage cylinder simultaneously releases the hydraulic oil, and the throttle valve is used to control the lifting speed of the baffle to avoid impact damage to the structure. After the baffle is raised to the set height, the hydraulic system is automatically locked to maintain the water-blocking state, forming a purely mechanical redundancy protection. No external energy is required, and the gravity potential energy is used to achieve emergency response. The hydraulic system avoids rapid impact, extends the life of the equipment, and ensures the sealing effect. The dual-drive redundant mechanism automatically starts in the event of a power outage or motor failure, and the baffle is raised through a purely mechanical structure, avoiding the risk of "failure upon power failure" of the traditional electric system, thereby improving the safety of the system.

[0028] 2. In the present invention, the arc-shaped guide groove and hydraulic buffer design balance the water pressure when the baffle is raised, thereby improving the impact resistance. The water-swelling waterstop strip enhances the sealing performance and reduces the risk of water leakage. The anti-accidental touch protection cover on the outside of the sensor can block interference from debris, thereby reducing the false alarm rate of liquid level monitoring. The signal dual verification mechanism uses wired + wireless dual communication links to prevent silent omissions caused by line failures, thereby greatly reducing the false alarm rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a flow chart of a flood prevention system and control method for an underground distribution room proposed by the present invention;

[0030] Figure 2 This is a schematic diagram of the rainwater collection well structure of an underground distribution room flood prevention system and control method proposed by the present invention;

[0031] Figure 3 This is a schematic diagram of the structure of a water-expanding waterstop strip in an underground power distribution room flood prevention system and control method proposed by the present invention;

[0032] Figure 4 This is a schematic diagram of the arc-shaped guide rail structure of an underground power distribution room flood prevention system and control method proposed by the present invention;

[0033] Figure 5 This is a schematic diagram of the synchronous gear structure of an underground distribution room flood prevention system and control method proposed by the present invention.

[0034] Legend:

[0035] 1. Water-expanding waterstop; 2. Rainwater collection well; 3. Cable trench; 4. Rainwater collection trough; 5. Baffle; 6. Synchronous gear; 7. Arc guide rail groove. DETAILED DESCRIPTION

[0036] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0037] Reference Figure 1-3 The present invention provides an embodiment of a flood control system for an underground power distribution room, including a drainage device and a monitoring system, characterized in that the drainage device includes a baffle 5, a synchronous gear 6, an arc-shaped guide rail groove 7, a water-expanding waterstop 1, and a dual-drive redundant mechanism, wherein the dual-drive redundant mechanism includes a gravity drive and a liquid level drive;

[0038] The baffle 5 is a hidden flexible flood-proof metal baffle. The baffle 5 is set in the arc-shaped guide rail groove 7 of the concrete bottom plate at the entrance of the underground distribution room to block external water damage. The synchronous gear 6 drives the rack at the bottom of the baffle 5 to make the baffle 5 move up and down in an arc along the arc-shaped guide rail groove 7. The arc-shaped guide rail groove 7 provides mechanical support and movement guidance for the baffle 5. A rack structure matching the synchronous gear 6 is set at the bottom of the baffle 5. Water-expanding waterstop strips 1 are embedded in the guide rail grooves on both sides of the baffle 5. After swelling in water, the gap between the baffle and the guide rail is sealed.

[0039] The monitoring system includes a liquid level sensor group, a microprocessor, a wireless communication module and a signal dual verification mechanism. The liquid level sensor group is set at the upper, middle and lower limit positions in the rainwater collection well 2 for real-time monitoring of the water level. The microprocessor communicates with the liquid level sensor group and outputs control instructions according to the water level signal. The wireless communication module is used to transmit the monitoring data to a remote server or administrator terminal. The sensor inside the signal dual verification mechanism is connected to the wired signal and the wireless signal at the same time. The two signals are transmitted independently to the microprocessor. When the wired signal is interrupted but the wireless signal is normal, a local alarm is triggered. When the two signals are interrupted at the same time, it is forced to be judged as an abnormal state and a global alarm is triggered.

[0040] The dual-drive redundant mechanism includes a gravity counterweight, a hydraulic energy storage cylinder and an electromagnetic locking mechanism. The counterweight is connected to the lifting lug on the baffle 5 through a steel wire rope. When the power is off, the gravity potential energy is released to pull the baffle up. The electromagnetic locking mechanism locks the counterweight when the power is normally supplied. When the power is off or the main drive encounters a fault, the counterweight is released, and the baffle 5 is pulled up along the arc guide groove 7 by gravity. The hydraulic energy storage cylinder can control the lifting speed of the baffle and provide buffer damping to avoid impact. The counterweight is located in the underground foundation pit near the door of the distribution room, at the same height as the bottom of the baffle. The hydraulic energy storage cylinder is installed on the side of the baffle 5 and the arc guide groove 7. At the connection, the electromagnetic locking mechanism is installed on the wall of the distribution room at the side end of the arc guide groove 7, and is connected to the microprocessor through a waterproof cable. The gravity counterweight block is made of cast iron and weighs 1.2 times the weight of the baffle. It is installed in the underground foundation pit on the side of the baffle and is connected to the bottom ear of the baffle through a galvanized steel wire rope. The hydraulic energy storage cylinder model is HGS-32×500. The cylinder body is fixed to the outer wall of the guide groove, and the piston rod is hinged to the side ear plate of the baffle to ensure that the hydraulic cylinder stroke matches the arc trajectory when the baffle is raised. The dual-drive redundant mechanism does not require active power sources such as electricity and hydraulic pumps, and only uses gravity potential energy. The passive mechanical action of the hydraulic energy storage cylinder realizes water blocking, and solves the problem of system collapse caused by power source failure. The drainage device also includes a cable trench 3, a rainwater collection tank 4 and a rainwater collection well 2. The rainwater collection tank 4 is arranged at the bottom of the cable trench 3, and the rainwater collection tank 4 is connected to the rainwater collection well 2. A drainage pump is arranged in the rainwater collection well 2. The drainage pump is a variable frequency pump. The speed is automatically adjusted according to the signal of the liquid level sensor. It runs at low power when the water level is low and at full power or overclocking when the water level is high. The monitoring system also includes a historical data trend analysis module for recording and analyzing historical water levels, pump operation time, baffle start and stop times, etc. The number of closures and other data are used to generate trend charts and predict the pattern of water accumulation, so as to adjust the drainage strategy in advance. A metal protective cover is provided on the outside of the liquid level sensor to prevent accidental touch. The metal protective cover is a hollow structure and has an inclined arc to prevent sediment accumulation. A flood prevention system and control method for an underground power distribution room. The liquid level sensor group in the monitoring system monitors the water level of rainwater collection well 2 in real time: when the lower limit is not reached, the signal value is negative, the microprocessor determines that it is normal, the drainage pump is turned off, and the baffle is retracted; when the lower limit is reached, the signal value turns positive, the microprocessor outputs instruction 1, starts the first drainage pump, and the variable frequency pump runs at low power;When the water level reaches the lower limit, the signal is continuously positive, and instruction 2 is output to start the second drainage pump. The dual pumps run at full power and at the same time trigger the servo motor to lift the baffle 5 to block the water. When the liquid level sensor detects that the water level is ≥ the lower limit and the microprocessor detects that the main power is off or the servo motor fails, the electromagnetic locking mechanism is powered off to release the gravity counterweight. The counterweight falls due to its own weight and the baffle 5 is pulled up along the arc guide groove 7 by the wire rope. The hydraulic energy storage cylinder simultaneously releases the hydraulic oil and controls the lifting speed of the baffle through the throttle valve to avoid jamming or deformation caused by gravity impact. After the baffle is raised, the hydraulic energy storage cylinder locks the position to maintain the water blocking state. At this time, the backup power is started to keep the drainage pump and sensor running. When the water level reaches the upper limit and the drainage rate of the dual pumps is still less than the water inlet rate, the microprocessor outputs instruction 3 to cut off the main power supply of the distribution room, leaving only the backup power supply for the drainage pump and the alarm system. The drainage pump switches to maximum power overclocking operation and notifies the administrator through an alarm. Plate 5 and waterstop 9 form the final line of defense, slowing the intrusion of floodwater and buying time for emergency response. If the sensor communication line is damaged, such as a water short circuit, the wired and wireless dual-signal verification mechanism is triggered: a single signal interruption triggers a local alarm, prompting inspection personnel to check the line. If both signals are interrupted, the system automatically determines an abnormality and immediately initiates the raising of the baffle and full operation of the drainage pump. A composite alarm of "communication failure + water level abnormality" is simultaneously sent to the administrator. If the dual-drive redundant mechanism detects a power outage or main drive failure, the electromagnetic locking mechanism de-energizes and unlocks. The counterweight drops under its own weight, and the baffle is raised along the guide rails by the wire rope. The energy storage cylinder simultaneously releases hydraulic oil, and a throttle valve controls the baffle raising speed to prevent impact damage to the structure. Once the baffle reaches the set height, the hydraulic system automatically locks to maintain the water-blocking state. This provides a purely mechanical redundancy guarantee, requiring no external energy and utilizing gravitational potential energy for emergency response. The hydraulic system also protects against rapid impact, extending equipment life and ensuring effective sealing.

[0041] A control method for a flood prevention system in an underground distribution room comprises the following steps:

[0042] S1: Real-time monitoring stage: The elevation of the cable trench 3 in the underground power distribution room is lower than that of the surrounding rainwater drainage ditches and sewage ditches. Rainwater in the cable trench 3 flows into the rainwater collection trough 4 and collects in the rainwater collection well 2. The liquid level sensor group monitors the water level in the rainwater collection well 2 in real time. When the water level reaches the lower limit, the microprocessor outputs instruction 1 to start the first drainage pump; when the water level reaches the middle limit, it outputs instruction 2 to start the second drainage pump and raise the baffle 5; when the water level reaches the upper limit, it outputs instruction 3 to cut off the main power supply of the power distribution room, start the backup power supply, and drain the water at full power, while sending an alarm message to the administrator terminal.

[0043] S2: Dual drive switching stage: When the microprocessor outputs instruction 1 and the power supply is normal, the servo motor drives the baffle 5 to open and close. When a power outage or main drive failure is detected, the electromagnetic locking mechanism releases the gravity counterweight block, and the baffle 5 is pulled up by gravity. The hydraulic energy storage cylinder controls the lifting speed and provides a buffer. After the baffle 5 is fully opened, the water-expandable waterstop strips 1 embedded in the arc-shaped slide grooves 7 on both sides expand when exposed to water to seal, ensuring that it can withstand floods without leakage;

[0044] S3: Signal verification stage: The microprocessor verifies the sensor's wired and wireless signals in real time. When the signal is abnormal, an alarm or emergency response is triggered according to the preset logic.

[0045] After the drainage pump is started, if the pumping rate is greater than the water intrusion flow rate and the water level drops below the lower limit, the drainage pump will be shut down according to the set delay. If the pumping rate is less than the water intrusion flow rate, the backup pump and baffle 5 will be started in sequence to form a double flood prevention protection. The monitoring system continuously outputs negative signals under normal conditions and positive signals under abnormal conditions. When the communication line is damaged and the signal is interrupted, the positive signal is forced to be maintained and the alarm is triggered to avoid silent omissions.

[0046] Working Principle: A flood prevention system and control method for an underground power distribution room. The liquid level sensor group in the monitoring system monitors the water level in rainwater collection well 2 in real time. When the signal value does not reach the lower limit, it is negative, the microprocessor determines it is normal, the drainage pump is shut down, and the baffle is retracted. When the signal value reaches the lower limit, it turns positive, and the microprocessor outputs instruction 1 to start the first drainage pump, and the variable frequency pump runs at low power. When the signal value reaches the middle limit, it continues to be positive, and the microprocessor outputs instruction 2 to start the second drainage pump, and both pumps run at full power. At the same time, the servo motor is triggered to raise baffle 5 to block water.

[0047] When the liquid level sensor detects that the water level is ≥ the lower limit, and the microprocessor detects that the main power is off or the servo motor fails, the electromagnetic locking mechanism is powered off to release the gravity counterweight. The counterweight falls due to its own weight, and the baffle 5 is pulled up along the arc guide groove 7 by the wire rope. The hydraulic energy storage cylinder releases the hydraulic oil simultaneously, and the throttle valve controls the lifting speed of the baffle to avoid jamming or deformation caused by gravity impact. After the baffle is raised, the hydraulic energy storage cylinder locks the position to maintain the water blocking state. At this time, the backup power is started to keep the drainage pump and sensor running. When the water level reaches the upper limit and the dual pump drainage rate is still less than the water inlet rate, the microprocessor outputs instruction 3 to cut off the power distribution. The main power supply of the room is turned off, and only the backup power supply is retained for the drainage pump and alarm system. The drainage pump is switched to maximum power and overclocked operation. At the same time, the administrator is notified through the alarm. The gravity + hydraulically driven baffle 5 and the water stop bar 9 form the last line of defense, slowing down the speed of flood intrusion and buying time for rescue. If the sensor communication line is damaged, such as water short circuit, the wired + wireless dual signal verification mechanism is triggered: when a single signal is interrupted, a local alarm is triggered, prompting the inspection personnel to check the line. When the dual signals are interrupted, the system is forced to determine it as abnormal, and the baffle is immediately started to rise + the drainage pump is fully opened, and a "communication failure + water level abnormality" composite alarm is sent to the administrator.

[0048] When the dual-drive redundant mechanism detects a power outage or main drive failure, the electromagnetic locking mechanism is de-energized and unlocked, the counterweight falls due to its own weight, and the baffle is pulled up along the guide rail by the wire rope. The energy storage cylinder simultaneously releases hydraulic oil and controls the lifting speed of the baffle through the throttle valve to avoid impact damage to the structure. After the baffle rises to the set height, the hydraulic system automatically locks to maintain the water-blocking state, forming a purely mechanical redundancy protection. No external energy is required, and gravitational potential energy is used to achieve emergency response. The hydraulic system avoids rapid impact, extends the life of the equipment, and ensures the sealing effect.

[0049] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A flood control system for an underground distribution room, comprising a drainage device and a monitoring system, characterized in that: The drainage device comprises a baffle (5), a synchronous gear (6), an arc-shaped guide rail groove (7), a water-expanding water stop strip (1) and a dual-drive redundant mechanism; The baffle (5) is a hidden flexible flood-proof metal baffle. The baffle (5) is arranged in the arc-shaped guide groove (7) of the concrete bottom plate at the door of the underground distribution room. The synchronous gear (6) drives the rack at the bottom of the baffle (5) to make the baffle (5) perform arc-shaped lifting movement along the arc-shaped guide groove (7). The arc-shaped guide groove (7) provides mechanical support and movement guidance for the baffle (5). The bottom of the baffle (5) is provided with a rack structure matching the synchronous gear (6). The water-expanding waterstop strip (1) is embedded in the guide grooves on both sides of the baffle (5); The monitoring system comprises a liquid level sensor group, a microprocessor, a wireless communication module and a signal double check mechanism. The liquid level sensor group is arranged at the upper, middle and lower limit positions in the rainwater collection well (2) for real-time monitoring of the water level. The microprocessor communicates with the liquid level sensor group and outputs a control instruction according to the water level signal. The wireless communication module is used to transmit the monitoring data to a remote server or an administrator terminal. The sensor inside the signal double check mechanism is connected to a wired signal and a wireless signal at the same time. The two signals are independently transmitted to the microprocessor. When the wired signal is interrupted but the wireless signal is normal, a local alarm is triggered. When both signals are interrupted at the same time, it is forcibly determined to be an abnormal state and a global alarm is triggered.

2. The underground distribution room flood prevention system according to claim 1, characterized in that: The dual-drive redundant mechanism comprises a gravity counterweight, a hydraulic energy storage cylinder and an electromagnetic locking mechanism. The counterweight is connected to a lifting lug on a baffle (5) via a steel wire rope. The electromagnetic locking mechanism locks the counterweight when power is normally supplied and releases the counterweight when power is cut off or a main drive fails. The baffle (5) is pulled up along the arc-shaped guide rail groove (7) by gravity, and the hydraulic energy storage cylinder provides buffer damping.

3. The underground distribution room flood prevention system according to claim 1, characterized in that: The counterweight block is located in an underground foundation pit near the door of the distribution room and is at the same height as the bottom of the baffle. The hydraulic energy storage cylinder is installed at the connection between the baffle (5) and the side of the arc guide groove (7). The electromagnetic locking mechanism is installed on the wall of the distribution room at the side end of the arc guide groove (7) and is connected to the microprocessor through a waterproof cable.

4. The underground distribution room flood prevention system according to claim 1, characterized in that: The drainage device further comprises a cable trench (3), a rainwater collection trough (4) and a rainwater collection well (2); the rainwater collection trough (4) is arranged at the bottom of the cable trench (3); the rainwater collection trough (4) is communicated with the rainwater collection well (2); a drainage pump is arranged in the rainwater collection well (2); the drainage pump is a variable frequency pump, which automatically adjusts its speed according to a signal from a liquid level sensor, operates at low power when the water level is low, and operates at full power or overclocking when the water level is high.

5. The underground distribution room flood prevention system according to claim 1, characterized in that: The monitoring system also includes a historical data trend analysis module for recording and analyzing historical water levels, pump operating hours, damper opening and closing times and other data, generating trend charts and predicting water accumulation patterns, and adjusting drainage strategies in advance.

6. The underground distribution room flood prevention system according to claim 1, characterized in that: A metal protective cover to prevent accidental touch is provided on the outside of the liquid level sensor. The metal protective cover to prevent accidental touch is a hollow structure and has an inclined arc to prevent sediment accumulation.

7. A control method for an underground power distribution room flood prevention system, comprising the underground power distribution room flood prevention system according to any one of claims 1 to 6, characterized in that: The following steps are involved: S1: Real-time monitoring stage: The elevation of the cable trench (3) in the underground power distribution room is lower than the elevation of the surrounding rainwater drainage trenches and sewage trenches. Rainwater in the cable trench (3) flows into the rainwater collection trough (4) and collects in the rainwater collection well (2). The liquid level sensor group monitors the water level in the rainwater collection well (2) in real time. When the water level reaches the lower limit, the microprocessor outputs instruction 1 to start the first drainage pump; when the water level reaches the middle limit, it outputs instruction 2 to start the second drainage pump and raise the baffle (5); when the water level reaches the upper limit, it outputs instruction 3 to cut off the main power supply of the power distribution room, start the backup power supply and drain the water with full power, and send an alarm message to the administrator terminal at the same time; S2: Dual drive switching stage: When the microprocessor outputs instruction 1 and the power supply is normal, the servo motor drives the baffle (5) to open and close. When a power outage or main drive failure is detected, the electromagnetic locking mechanism releases the gravity counterweight block, and the baffle (5) is lifted by gravity. The hydraulic energy storage cylinder controls the lifting speed and provides buffering. After the baffle (5) is opened to the right position, the water-expandable water stop strips (1) embedded in the arc-shaped slide grooves (7) on both sides swell when exposed to water to seal, ensuring that there is no leakage when resisting floods; S3: Signal verification stage: The microprocessor verifies the sensor's wired and wireless signals in real time. When the signal is abnormal, an alarm or emergency response is triggered according to the preset logic.

8. The control method of the underground power distribution room flood prevention system according to claim 7, characterized in that: After the drainage pump is started, if the drainage rate is greater than the water source intrusion flow rate and the water level drops below the lower limit, the drainage pump will be shut down according to the set delay. If the drainage rate is less than the water source intrusion flow rate, the standby pump and the baffle (5) will be started in sequence to form a double flood prevention protection.

9. The control method of the underground power distribution room flood prevention system according to claim 7, characterized in that: The monitoring system continuously outputs negative signals under normal conditions and positive signals under abnormal conditions. When the communication line is damaged and the signal is interrupted, the system is forced to maintain a positive signal and trigger an alarm to avoid silent omissions.

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