Special fire extinguishing system for electric power based on active detection and fire extinguishing

Abstract

The invention discloses a fire extinguishing system special for electric power based on active detection and fire extinguishing, and relates to the field of fire extinguishing systems. A single superfine dry powder fire extinguishing device is mainly adopted as a cable trench fire extinguishing measure, and the device does not have an active fire detection capability and cannot timely and quickly extinguish fire in real time in the actual application process of a cable trench, so that relatively large fire loss is easily caused. The system comprises a fire extinguishing device, a temperature sensing optical fiber host, a distributed temperature sensing optical fiber, a fire alarm host and a fire extinguishing controller, the distributed temperature sensing optical fiber is connected with the temperature sensing optical fiber host, the temperature sensing optical fiber host is connected with the fire alarm host, the fire alarm host is connected with the fire extinguishing controller, and the fire extinguishing controller is connected with the fire extinguishing device. The fire extinguishing device is connected with the fire extinguishing pipe network. The system integrates active fire detection, automatic alarm and automatic control fire extinguishing devices, and can effectively perform detection at the initial stage of the fire and quickly convey a fire extinguishing agent to the fire position in real time to extinguish the fire.

Description

Technical Field

[0001] The present invention relates to the field of fire extinguishing systems, and particularly to a special power fire extinguishing system based on active detection and extinguishing. Background Art

[0002] Currently, the fire risk in cable trenches and other relatively enclosed spaces within a substation is relatively high, and potential fire safety hazards still exist. At the same time, there is a lack of a convenient, effective, cost - controllable, easy - to - install, strongly - guaranteed, and highly - maintainable solution.

[0003] Currently, the fire extinguishing measures for cable trenches mainly include water spray, aerosol, and super - fine dry powder. Among these three fire extinguishing measures, super - fine dry powder is mainly used. In the actual application process of single - unit super - fine dry powder in cable trenches, it does not have the ability of active fire detection, cannot conduct targeted real - time fire extinguishing in a timely and rapid manner, and is prone to causing relatively large fire losses. Summary of the Invention

[0004] The technical problem to be solved and the technical task proposed by the present invention are to improve and refine the existing technical solutions, and provide a special power fire extinguishing system based on active detection and extinguishing to detect and conduct real - time fire extinguishing in a timely manner when a fire breaks out initially. For this purpose, the present invention adopts the following technical solutions.

[0005] A special power fire extinguishing system based on active detection and extinguishing includes an active fire detection subsystem and an active fire extinguishing subsystem. The active fire detection subsystem includes: A temperature - sensing optical fiber host for receiving and processing temperature signals; A distributed temperature - sensing optical fiber continuously laid along the surface of the object to be protected and connected to the temperature - sensing optical fiber host; The active fire extinguishing subsystem includes: A fire alarm host communicatively connected to the temperature - sensing optical fiber host for receiving temperature anomaly signals and generating fire - extinguishing instructions; A fire - extinguishing controller connected to the fire alarm host to receive the fire - extinguishing instructions; A fire - extinguishing device controlled by the fire - extinguishing controller and storing fire - extinguishing media; A fire - extinguishing pipeline network connected to the output end of the fire - extinguishing device, and a plurality of directional nozzles are provided on the fire - extinguishing pipeline network.

[0006] This technical solution integrates multiple key links such as active detection of fire, automatic alarm, and automatic control of the fire - extinguishing device for fire extinguishing. The fire - extinguishing device can quickly deliver the fire - extinguishing agent to the fire location, and can effectively detect and conduct real - time fire extinguishing in the initial stage of a fire, thereby greatly reducing the losses caused by the fire.

[0007] The use of distributed temperature-sensing optical fiber technology can monitor the temperature changes of power equipment in real time, and realize long-distance and large-scale continuous monitoring of fire hazards. Compared with traditional point detectors, it can detect local overheating and other fire signs earlier, and is especially suitable for complex environments such as cable tunnels and switch cabinets.

[0008] The system integrates the "detection-alarm-fire extinguishing" closed-loop control: the temperature-sensing optical fiber host transmits temperature data to the fire alarm host, triggering the sound and light alarm; the alarm host links the fire extinguishing controller, automatically starts the fire extinguishing device, and quickly releases the fire extinguishing agent to the fire source through the pipe network. The whole process does not require manual intervention, the response time is extremely short, and the fire can be extinguished at the initial stage of the fire.

[0009] The fire extinguishing device works in conjunction with the pipe network system to spray fire extinguishing agents (such as ultra-fine dry powder, heptafluoropropane, etc.) in a targeted manner in specific areas, avoiding the waste of resources in total flooding fire extinguishing and reducing secondary damage to equipment.

[0010] Through active detection and immediate fire extinguishing, the spread of fire can be effectively controlled. It is particularly suitable for key power places such as substations and distribution rooms, and can minimize equipment damage, power outages and casualties.

[0011] As a preferred technical means: the distributed temperature-sensitive optical fiber is horizontally laid on the surface of the protected object in a sinusoidal waveform, and after reaching the end of the protected object, it turns back to form a cross point, forming a continuous "∞" shape, and its head and end are respectively connected to two independent signal acquisition channels of the temperature-sensitive optical fiber host.

[0012] Since the optical fiber is laid in a sinusoidal waveform, it can cover a larger area and has a high laying density. It can monitor multiple measuring points within the distribution range along the line in real time. The high density of measuring points makes the detection more sensitive.

[0013] Sine waves are laid horizontally to form a continuous "∞"-shaped structure, which can form a three-dimensional cross-monitoring network on the surface of the protected object (such as cables and pipelines), eliminating the monitoring blind spots of traditional straight-line laying. Optical fibers are orthogonally superimposed at the intersection, forming dual temperature perception at the same physical location, improving the sensitivity of local hot spot detection. Independent signal channels are connected at both ends to realize bidirectional temperature data collection of the optical fiber link; when a section of optical fiber is physically damaged, the other channel can still maintain monitoring continuity through reverse data feedback, and the system reliability is improved. The sine waveform structure can effectively alleviate the mechanical stress of the optical fiber caused by thermal expansion and contraction of the equipment. The physical marking point formed by the intersection can be used as a natural positioning reference. The dual signal channels adopt differential signal transmission mode, which can effectively offset common mode interference. The magnetic ring structure formed by cross laying can reduce 50Hz power frequency interference and is suitable for strong electromagnetic field environments (such as GIS switch cabinets). Dual-channel signal comparison can detect the integrity of the optical fiber link in real time, and through the signal feature analysis at the intersection, it can accurately identify fault types such as optical fiber breakage and fusion loss.

[0014] As a preferred technical measure: The fire extinguishing pipeline network is laid above one side of the protected object, and nozzles are opened every 1 to 3 meters along the length direction of the fire extinguishing pipeline network, and the nozzles are directed towards the protected object. During fire extinguishing, it can ensure that the fire extinguishing agent can be evenly sprayed and covered on the surface of the entire protected object in a total flooding form.

[0015] As a preferred technical measure: The diameter of the nozzles gradually increases from the proximal end where the fire extinguishing pipeline network is connected to the fire extinguishing controller towards the distal end. The gradual increase in the nozzle diameter from the proximal end to the distal end of the fire extinguishing pipeline network can ensure smoother flow of the fire extinguishing agent in the pipeline network, and at the same time, it can still maintain sufficient pressure and flow rate when reaching the distal end.

[0016] In the fire extinguishing pipeline network, due to the existence of frictional resistance along the way, there will be pressure loss during the flow of the fire extinguishing agent. The proximal end is closer to the fire extinguishing controller, so the pressure is relatively high, while the distal end has a relatively low pressure. Gradually increasing the nozzle diameter from the proximal end to the distal end can limit the flow rate of the fire extinguishing agent with the smaller nozzles at the proximal end, and the larger nozzles at the distal end can ensure sufficient fire extinguishing agent is ejected under the condition of relatively low pressure, thereby achieving relatively balanced flow rates of the fire extinguishing agent at each nozzle along the length direction of the fire extinguishing pipeline network, and ensuring uniform fire extinguishing protection for the entire protected area. Each nozzle can eject the fire extinguishing agent at an appropriate flow rate according to the pressure situation at its location, enabling the fire extinguishing agent to more effectively cover the surface of the protected object and more quickly control and extinguish the fire. For example, in the area of electrical equipment, it can ensure that fire sources at different positions can be covered by the fire extinguishing agent in a timely manner, avoiding the situation of untimely local fire extinguishing, and overall improving the fire extinguishing efficiency of the fire extinguishing system. It helps to optimize the pressure distribution in the fire extinguishing pipeline network, reducing pressure fluctuations and sudden pressure changes. Since the gradual change in the nozzle diameter matches the pressure loss, the pressure change in the pipeline network becomes more stable, reducing the risk of system failures caused by abnormal pressure, such as pipeline rupture, loosening of connectors, etc., which is beneficial to maintaining the stable operation of the fire extinguishing system. By reasonably designing the nozzle diameter to adapt the flow rate of the fire extinguishing agent to the pressure distribution, energy waste caused by overpressure or unreasonable flow rate distribution can be avoided while ensuring the fire extinguishing effect; at the same time, the pressure requirements for the power equipment in the fire extinguishing system are also reduced, lowering the equipment selection specifications and operating costs, and improving the economy of the system. The balanced flow rate distribution and optimized pressure distribution reduce the working burden of each part of the fire extinguishing pipeline network, lower the probability of component damage, extend the service life of the system, and moreover, during a fire, the system can work more stably and reliably, reducing the possibility of fire extinguishing failure due to system failures, enhancing the reliability and safety of the entire fire extinguishing system.

[0017] As a preferred technical measure: The axis of the nozzle forms an inclined angle of 45° to 70° with the vertical normal plane of the pipe network, so that the injection trajectory of the fire extinguishing medium forms an incident angle of 20° to 45° with the normal direction of the surface of the protected object. This ensures that the fire extinguishing agent can be more accurately injected into the area where the fire occurs, improves the fire extinguishing efficiency, and effectively curbs the spread of the fire.

[0018] An incident angle of 20° to 45° allows the fire extinguishing medium to be injected onto the surface of the protected object at an appropriate angle. Compared with vertical injection or injection at too large or too small an angle, it can achieve a wider and more uniform coverage. For example, when protecting the large surface area of electrical equipment, it can effectively avoid the occurrence of injection blind spots, ensure that the entire surface of the protected object can receive sufficient fire extinguishing medium, and improve the comprehensiveness and effectiveness of fire extinguishing. This angle range is conducive to the fire extinguishing medium better adhering to and penetrating into the surface of the protected object and the possible internal fire sources. For some fire sources hidden in the gaps or inside the equipment, the inclined-injected fire extinguishing medium can reach the fire source more deeply, quickly suppress and extinguish the fire, thereby improving the fire extinguishing efficiency and shortening the fire extinguishing time. This technical solution can reduce the splashing and rebounding phenomena generated by direct impact when the fire extinguishing medium contacts the surface of the protected object. It can not only make the fire extinguishing medium act more effectively on the fire source, but also avoid the waste of the fire extinguishing medium and unnecessary impact on the surrounding environment, and improve the utilization rate of the fire extinguishing medium. Compared with vertical injection, injecting the fire extinguishing medium at an incident angle of 20° to 45° has a relatively smaller impact force on the surface of the protected object, which is particularly important for some precision electrical equipment. It can reduce the risk of damage to the equipment caused by the impact force generated during the fire extinguishing process, protect the integrity and subsequent usability of the electrical equipment, and reduce the secondary damage to the equipment itself caused by the fire extinguishing operation. After the inclined-injected fire extinguishing medium reaches the surface of the protected object, it will form a specific air flow pattern, which helps to take away the heat and smoke generated by combustion, and at the same time prevents the full contact of air with the fire source, playing a role in isolating oxygen and suppressing combustion, and further enhancing the fire extinguishing effect.

[0019] As a preferred technical measure: The fire extinguishing controller is a dual-redundancy controller, which includes a main control module and a standby module. When the main control module fails, the standby module automatically takes over the control right; The fire extinguishing device is provided with two independent output pipelines, which are respectively connected to the fire extinguishing pipe networks of two fire prevention zones, and the distributed temperature-sensing optical fibers in each zone form independent detection loops.

[0020] This technical solution can achieve 2 sets of fire extinguishing control loops through one fire extinguishing device, which can effectively reduce costs and achieve independent active fire extinguishing control for different fire prevention zones.

[0021] The design of the master module and the standby module in the dual-redundancy controller greatly enhances the stability and reliability of the system. In an environment such as the power system where extremely high reliability is required, once the master module fails, the standby module can automatically take over the control right to ensure the uninterrupted operation of the fire extinguishing system, continuously monitor and respond to fires, and prevent the fire extinguishing system from failing due to controller failures, thereby effectively ensuring the safety of power facilities.

[0022] This technical solution has strong fault tolerance. Even if a certain module has problems, it will not affect the normal operation of the entire system. The system can repair or replace the faulty module without interrupting the service, improving the maintainability and usability of the system, and reducing the power outage time and economic losses caused by system failures. For a critical mission system such as a power-specific fire extinguishing system, the dual-redundancy controller can ensure that the fire extinguishing instructions can be executed promptly and accurately under any circumstances, guaranteeing that the fire extinguishing device starts quickly and operates normally when a fire occurs, effectively preventing the spread of fire, and protecting the safety of power equipment and personnel.

[0023] The fire extinguishing device is equipped with two sets of independent output pipelines, which are respectively connected to the fire extinguishing pipe networks of two fire prevention zones, enabling precise fire extinguishing for different fire prevention zones. When a fire occurs in a certain fire prevention zone, the corresponding pipeline can be independently activated to accurately deliver the fire extinguishing agent to the fire area, avoiding waste of the fire extinguishing agent in unnecessary areas, and improving the pertinence and effectiveness of fire extinguishing. The distributed temperature sensing optical fibers in each zone form independent detection loops, which can independently detect fires in each fire prevention zone. Once a fire is detected in a certain zone, the system can quickly determine the fire area and only activate the fire extinguishing device in that area, while taking measures to prevent the fire from spreading to other zones, effectively controlling the fire and reducing the losses caused by the fire. The independent output pipelines and detection loops make the system more flexible and scalable. When the layout of power facilities changes or expansion is carried out, the systems in different fire prevention zones can be conveniently adjusted and upgraded without affecting the normal operation of other zones; at the same time, it is also convenient to individually maintain and detect the fire extinguishing systems in each zone, improving the management efficiency of the system. Even if the detection loop or output pipeline in one of the zones fails, the system in the other zone can still operate normally, without affecting the fire protection of the entire power facility, enhancing the system's response ability in the face of various disasters and failures, and ensuring that some areas can still receive effective fire extinguishing protection in complex situations.

[0024] As a preferred technical measure: The fire alarm host is connected to the upper computer through wired / wireless means to transmit fire information; the transmitted fire information at least includes the temperature extreme value, the coordinates of the abnormal area, and the alarm level. The information such as the location of the fire can be uploaded to the upper computer in real time, facilitating remote real-time monitoring by management personnel.

[0025] The transmitted fire information includes the temperature extreme value, which enables the staff to intuitively understand the temperature situation at the fire scene and judge the severity of the fire; the coordinates of the abnormal area can accurately locate the specific location of the fire, facilitating the fire-fighting personnel to quickly and accurately reach the fire scene, take targeted fire-fighting and rescue measures, improve the rescue efficiency, and reduce the fire loss. The transmission of the alarm level helps to achieve hierarchical response and management. According to different alarm levels, relevant departments can take different levels of emergency measures and rationally allocate resources such as manpower and materials. For example, for high-level alarms, a large number of fire-fighting forces and professional equipment can be quickly mobilized for firefighting; for lower-level alarms, preliminary verification and monitoring can be carried out first to avoid overreaction and achieve the optimal allocation of resources. After receiving comprehensive fire information including the temperature extreme value, the coordinates of the abnormal area, and the alarm level, the host computer can conduct more in-depth data analysis and processing, providing strong support for fire-fighting and emergency decision-making. Managers can formulate more scientific and reasonable fire-fighting plans, evacuation plans, etc. based on this information, improving the ability and level to respond to emergencies such as fires. The transmission of fire information makes remote monitoring possible. Even if the staff is not on-site, they can understand the fire situation in real time through the host computer, which is conducive to promptly activating the emergency plan and making relevant preparations in advance. At the same time, it is also convenient for remote command and dispatch of the fire scene, improving the overall emergency response speed and collaborative combat ability.

[0026] As a preferred technical means: Each output pipe of the fire extinguishing device is provided with a trigger feedback device, which includes: A pressure sensor that real-time detects the pipeline pressure; A signal comparator that outputs a trigger signal when the pressure value exceeds the set value; The self-locking relay maintains the normally open contact in the closed state after receiving the trigger signal until it receives the reset signal. It can real-time feedback the on-off conduction information of the fire extinguishing agent output to the fire extinguishing controller, the fire extinguishing controller feeds back the information to the fire alarm host, and the fire alarm host transmits the information to the upper computer. The pressure sensor can real-time detect the pipeline pressure, enabling the staff to understand the pressure condition in the output pipe of the fire extinguishing device at any time, which helps to promptly discover possible pressure abnormalities in the pipeline. For example, during the transportation of the fire extinguishing agent, if the pressure suddenly drops or rises, it may indicate problems such as pipeline leakage or blockage. Through real-time monitoring, the problem can be quickly located, providing a basis for subsequent maintenance and troubleshooting to ensure that the fire extinguishing system is always in good operating condition. The real-time pressure data can also be used as an important basis for system performance evaluation. By analyzing the pressure data at different time periods and under different working conditions, the working efficiency of the fire extinguishing system, the transportation situation of the fire extinguishing agent, etc. can be evaluated, providing data support for system optimization and improvement, and helping to improve the overall performance of the fire extinguishing system. The signal comparator can accurately compare the pressure value detected by the pressure sensor with the set value and output a trigger signal when the pressure value exceeds the set value, ensuring that the trigger feedback device can be triggered at the appropriate time. Only when the pressure reaches a specific condition will a signal be emitted, avoiding false triggering caused by factors such as pressure fluctuations, improving the accuracy and reliability of the system, and ensuring that the fire extinguishing device will operate only when it is truly needed. This technical solution can flexibly set the pressure threshold according to different fire extinguishing scenarios, pipeline characteristics, and fire extinguishing requirements. For example, for different types of fires or different protected areas, different fire extinguishing agent injection pressures may be required. By adjusting the set value, the fire extinguishing system can better adapt to various complex situations and achieve personalized fire protection. The self-locking relay maintains the normally open contact in the closed state after receiving the trigger signal until it receives the reset signal, ensuring that the trigger feedback device can maintain the triggered state. Even if the trigger signal briefly disappears or the system experiences momentary interference, it will not affect its working state, ensuring that the fire extinguishing device can work continuously and stably until the fire extinguishing task is completed or the staff performs a manual reset, improving the coherence and reliability of the fire extinguishing operation. The design of the self-locking relay allows the staff to perform the reset operation at an appropriate time without having to intervene immediately after the trigger, which provides the staff with more time to handle other emergency matters or perform subsequent operations, increasing the convenience and flexibility of the operation during the fire extinguishing process, and at the same time reducing the risk of incomplete fire extinguishing caused by misoperation or premature reset. In some emergency situations, such as when the fire scene is complex or personnel cannot reach the fire extinguishing device in time to operate, the self-locking relay can ensure that the fire extinguishing device continues to work according to the predetermined procedure, providing additional safety protection for the fire extinguishing work and reducing the possibility of fire spread caused by the accidental stop of the device.

[0027] As a preferred technical means: The self-locking relay is provided with a dual unlocking mechanism, including a mechanical reset button and an electronic reset interface. The electronic reset interface is used to unlock after receiving a specific frequency pulse signal sent by the fire extinguishing controller. After the fire extinguishing agent output is conducted, the feedback signal is in a locked state and can continuously transmit the feedback signal to the fire alarm host.

[0028] The dual unlocking mechanism composed of the mechanical reset button and the electronic reset interface provides double protection for the unlocking of the self-locking relay. When one unlocking method fails or cannot work properly, the other method can be used as a backup to ensure that the self-locking relay can be unlocked in time, enabling the fire extinguishing system to operate normally or perform subsequent maintenance operations, greatly improving the reliability and stability of the system, and reducing the risk of system failure caused by the failure of the unlocking mechanism. The dual unlocking mechanism can meet the unlocking requirements in different scenarios and needs. Under normal circumstances, remote control and automatic unlocking can be achieved through the electronic reset interface, improving work efficiency and intelligent level; while in special cases, such as damage to electronic equipment, communication failure or the need for emergency manual operation, the mechanical reset button can play a role to ensure the operability of the system. This flexibility enables the system to better adapt to various complex working environments and emergencies, enhancing the overall adaptability and survivability of the system.

[0029] Beneficial effects: This technical solution integrates multiple key links such as the active detection of fires, automatic alarm, and automatic control of fire extinguishing devices for fire extinguishing. The fire extinguishing device can quickly transport the fire extinguishing agent to the fire location, and can effectively detect and extinguish fires in the initial stage of the fire, thus greatly reducing the losses caused by fires. Description of the Drawings

[0030] Figure 1 is a schematic diagram of the system structure of the present invention.

[0031] Figure 2 is a schematic diagram of the nozzle position of the cross-section of the fire extinguishing pipeline network in the present invention.

[0032] In the figure: 1, temperature sensing optical fiber host; 2, distributed temperature sensing optical fiber; 3, fire alarm host; 4, fire extinguishing controller; 5, fire extinguishing device; 6, fire extinguishing pipeline network; 7, upper computer; 501, output pipe; 502, trigger feedback device; 601, nozzle. Specific Embodiments

[0033] The technical solution of the present invention will be further described in detail below with reference to the drawings in the specification.

[0034] Embodiment 1: As Figure 1As shown in the figure, a power - specific fire - extinguishing system based on active detection and fire - extinguishing includes a fire active detection device, a control device, and a fire - extinguishing device 5. The fire active detection device includes a temperature - sensing optical fiber host 1 and a distributed temperature - sensing optical fiber 2. The control device includes a fire alarm host 3 and a fire - extinguishing controller 4. The distributed temperature - sensing optical fiber 2 is laid on the object to be protected. The distributed temperature - sensing optical fiber 2 is connected to the temperature - sensing optical fiber host 1, the temperature - sensing optical fiber host 1 is connected to the fire alarm host 3. The fire alarm host 3 is connected to the upper computer 7 wirelessly to provide fire information. The fire alarm host 3 is connected to the fire - extinguishing controller 4, the fire - extinguishing controller 4 is connected to the fire - extinguishing device 5, and the fire - extinguishing device 5 is connected to the fire - extinguishing pipeline network 6.

[0035] In order to make the fire detection more sensitive, the distributed temperature - sensing optical fiber 2 is laid horizontally on the object to be protected in a sine - wave shape. After reaching the end of the object to be protected, it is arranged in the reverse direction, and finally crosses to form an "∞" shape. The head and tail ends of the distributed temperature - sensing optical fiber 2 are connected to two input ports of the temperature - sensing optical fiber host 1. Since the optical fiber is laid in a sine - wave shape, it can cover a larger area, and the laying density is high. It can monitor multiple measuring points within the distributed range along the line in real - time. The layout density of the measuring points is high, making the detection more sensitive.

[0036] In order to ensure that the fire - extinguishing agent still maintains sufficient pressure and flow rate when reaching the far end, the diameter of the nozzle 601 gradually increases from the proximal end where the fire - extinguishing pipeline network 6 is connected to the fire - extinguishing controller 4 to the far - end direction. The diameter of the nozzle 601 gradually increases from the proximal end to the far - end direction of the fire - extinguishing pipeline network 6, which can ensure that the flow of the fire - extinguishing agent in the pipeline network is smoother, and at the same time, it can still maintain sufficient pressure and flow rate when reaching the far end.

[0037] In order to reduce costs, the fire - extinguishing controller 4 adopts a dual - channel controller, the fire - extinguishing device 5 is a dual - channel fire - extinguishing device 5. The fire - extinguishing device 5 is respectively connected to the fire - extinguishing pipeline networks 6 of two fire prevention zones through 2 fire - extinguishing output ports. There are 2 groups of distributed temperature - sensing optical fibers 2, which are respectively laid in two fire prevention zones. Through one fire - extinguishing device 5, 2 sets of fire - extinguishing control circuits can be realized, which can effectively reduce costs and achieve independent active fire - extinguishing control for different fire prevention zones.

[0038] In order to feedback the on - off conduction information of the fire - extinguishing agent output, the fire - extinguishing device 5 is provided with 2 output pipes 501. The 2 output pipes 501 are respectively connected to the fire - extinguishing pipeline networks 6 of two fire prevention zones. A trigger feedback device 502 is respectively connected to each of the 2 output pipes 501. The 2 trigger feedback devices 502 are connected to the fire - extinguishing controller 4. It can feedback the on - off conduction information of the fire - extinguishing agent output to the fire - extinguishing controller 4 in real - time. The fire - extinguishing controller 4 feeds back the information to the fire alarm host 3, and the fire alarm host 3 transmits the information to the upper computer 7.

[0039] In order to continuously transmit the feedback signal to the fire alarm host 3, both of the 2 trigger feedback devices 502 are provided with a self-locking mechanism that locks the feedback signal after being turned on by the pressure in the pipeline. After the fire extinguishing agent output is turned on, the feedback signal is in a locked state and can continuously transmit the feedback signal to the fire alarm host 3.

[0040] When a fire occurs, after receiving the signal from the temperature sensing optical fiber host 1, the fire alarm host 3 will immediately analyze and process it. When only one section of the distributed temperature sensing optical fiber 2 alarms, the fire alarm host 3 only alarms and does not activate the fire extinguishing device 5. When two different sections of the distributed temperature sensing optical fiber 2 both alarm, the fire alarm host 3 issues an alarm signal and at the same time sends a signal to start the fire extinguishing device to the fire extinguishing controller 4. After obtaining the fire alarm signal, the fire extinguishing controller 4 activates one corresponding path of the fire extinguishing device 5 to output the fire extinguishing agent. The fire extinguishing agent is output through the corresponding output pipe 501 to the fire extinguishing pipe network 6 in the fire compartment where the fire occurs for jet fire extinguishing. In addition, the fire alarm host 3 transmits information such as the location of the fire and the on / off conduction of the fire extinguishing agent output to the upper computer 7 in real time for real-time monitoring.

[0041] This system integrates multiple key links such as the active detection of fires, automatic alarm, and automatic control of the fire extinguishing device 5 for fire extinguishing. The fire extinguishing device 5 can quickly deliver the fire extinguishing agent to the fire location and can effectively detect and extinguish fires in the initial stage of the fire, thus greatly reducing the losses caused by the fire.

[0042] Embodiment 2: In order to ensure that the fire extinguishing agent can be evenly sprayed onto the protected object, as Figure 2 shown, the fire extinguishing pipe network 6 is laid above one side of the protected object. The fire extinguishing pipe network 6 has nozzles 601 opened at intervals of 2 meters. The nozzles 601 of the fire extinguishing pipes are directed towards the protected object, and the angle A between the axis of the nozzle 601 and the vertical normal plane of the pipeline of the fire extinguishing pipe network 6 is 50°. In this example, the fire extinguishing pipe network 6 can be laid for targeted coverage spraying according to the range of the protected object, and can ensure that the fire extinguishing agent can be evenly sprayed onto the protected object in a total flooding form and cover the entire surface of the protected object during fire extinguishing.

[0043] The above-mentioned power-specialized fire extinguishing system based on active detection and fire extinguishing is a specific embodiment of the present invention, which has already reflected the substantial features and progress of the present invention. According to the actual usage needs, under the inspiration of the present invention, equivalent modifications can be made to its shape, structure, etc., and all are within the protection scope of this solution.

Claims

1. A special power fire extinguishing system based on active detection and fire extinguishing, characterized in that: It includes an active fire detection subsystem and an active fire extinguishing subsystem. The active fire detection subsystem includes: A temperature sensing fiber optic host (1) for receiving and processing temperature signals; A distributed temperature sensing fiber optic (2) continuously laid along the surface of the object to be protected and connected to the temperature sensing fiber optic host (1); The active fire extinguishing subsystem includes: A fire alarm host (3) communicatively connected to the temperature sensing fiber optic host (1) for receiving temperature anomaly signals and generating fire extinguishing instructions; A fire extinguishing controller (4) connected to the fire alarm host (3) to receive the fire extinguishing instructions; A fire extinguishing device (5) controlled by the fire extinguishing controller (4) and storing fire extinguishing media; A fire extinguishing pipeline network (6) connected to the output end of the fire extinguishing device (5), and a plurality of directional nozzles (601) are provided on the fire extinguishing pipeline network (6).

2. The power - specific fire - extinguishing system based on active detection and fire - extinguishing according to claim 1, wherein: The distributed temperature sensing fiber optic (2) is horizontally laid on the surface of the object to be protected in a sine wave shape, forms a crossover point after reaching the end of the object to be protected and then reversely folds back to form a continuous "∞" shape, and its head end and tail end are respectively connected to two independent signal acquisition channels of the temperature sensing fiber optic host (1).

3. The electric power special fire extinguishing system based on active detection and fire extinguishing according to claim 1 is characterized in that: The fire extinguishing pipeline network (6) is laid above one side of the object to be protected, and nozzles (601) are opened at intervals of 1 to 3 meters along the length direction of the fire extinguishing pipeline network (6), and the nozzles (601) are directed towards the object to be protected.

4. The power-specialized fire extinguishing system based on active detection and fire extinguishing according to claim 3, wherein: The diameter of the nozzle (601) gradually increases from the proximal end where the fire extinguishing pipeline network (6) is connected to the fire extinguishing controller (4) to the distal end.

5. The power - specific fire - extinguishing system based on active detection and fire - extinguishing according to claim 3, characterized in that: The axis of the nozzle (601) forms an inclined angle of 45° to 70° with the vertical normal plane of the pipeline network, so that the spraying trajectory of the fire extinguishing medium forms an incident angle of 20° to 45° with the normal direction of the surface of the object to be protected.

6. The electric power special fire extinguishing system based on active detection and fire extinguishing according to claim 1, wherein: The fire extinguishing controller (4) is a dual-redundancy controller, including a main control module and a standby module. When the main control module fails, the standby module automatically takes over the control right; the fire extinguishing device (5) is provided with two independent output pipelines, which are respectively connected to the fire extinguishing pipeline networks (6) of two fire prevention zones, and the distributed temperature sensing fiber optics (2) in each zone form independent detection loops.

7. The power - specific fire - extinguishing system based on active detection and fire - extinguishing according to claim 1, wherein: The fire alarm host (3) is connected to the upper computer (7) by wired / wireless means to transmit fire information; the transmitted fire information at least includes the temperature extreme value, the coordinates of the abnormal area and the alarm level.

8. The power - specific fire - extinguishing system based on active detection and fire - extinguishing according to claim 6, wherein: A trigger feedback device (502) is provided on each output pipe (501) of the fire extinguishing device (5), and this device includes: A pressure sensor for real-time detection of the pipeline pressure; A signal comparator for outputting a trigger signal when the pressure value exceeds the set value; A self-locking relay for maintaining the normally open contact in a closed state until a reset signal is received after receiving the trigger signal.

9. The electric power dedicated fire extinguishing system based on active detection and fire extinguishing according to claim 8, wherein: The self-locking relay is provided with a dual unlocking mechanism, including a mechanical reset button and an electronic reset interface, and the electronic reset interface is used to unlock after receiving a specific frequency pulse signal sent by the fire extinguishing controller (4).

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