Fire extinguishing device used in energy storage prefabricated cabin

Abstract

The invention relates to fire extinguishing equipment, and discloses a fire extinguishing device used in an energy storage prefabricated cabin, the fire extinguishing device comprises a fire extinguishing agent bottle group, a total flooding nozzle, a pack-level pipeline, an air exhaust concentration analyzer and a three-way reversing valve, the pack-level pipeline is provided with a fire detection pipe extending into a battery box, and the tail end of the fire detection pipe is provided with a low-leakage high-sealing air suction valve; one end of the air exhaust concentration analyzer is connected with the pack-level pipeline, air is sucked through a low-leakage high-sealing air suction valve on the fire detection pipe, a fire extinguishing runner, an air suction runner and a piston rod are arranged in the three-way reversing valve, the fire extinguishing agent bottle set is communicated with at least one of the pack-level pipeline and the total flooding nozzle through the fire extinguishing runner, and the air suction runner is communicated with the air exhaust concentration analyzer through the pack-level pipeline. And the gas extraction concentration analyzer directly extracts the gas in the battery box through the fire detection tube for analysis, so that early monitoring of fire hazards in the battery box is realized. The three-way reversing valve enables the fire extinguishing agent pipeline and the air suction pipeline to be the same pipeline, pipeline arrangement is simplified, and installation space is saved.

Description

Technical Field

[0001] This invention relates to fire extinguishing equipment, and more particularly to a fire extinguishing device for use in prefabricated energy storage compartments. Background Technology

[0002] In the field of fire protection for prefabricated energy storage cabins, the publication CN117815610A, "Fire Protection Device Placed in a Cabinet," provides an integrated fire protection solution. It integrates components such as extinguishing agent cylinder groups and driving gas cylinder groups into a fire protection cabinet and installs them at the top inside the cabinet. Pack-level fire suppression is achieved through pack fire detection tubes, and it is also equipped with total flooding sprinklers for overall fire suppression of the cabinet.

[0003] However, this technology has significant limitations in unmanned firefighting scenarios. Its firefighting activation relies on the pack's fire detection tube igniting and rupturing; that is, the driving gas cylinder group will only activate and release extinguishing agent 2 when the fire inside the battery box develops to a point sufficient to ignite and explode the fire detection tube. This activation method results in a long response time for the device, with a delay between the occurrence of a fire and the rupture of the fire detection tube triggering firefighting, making it difficult to contain the spread of fire in its early stages. Furthermore, due to limitations in the deployment range and sensing sensitivity of the fire detection tubes, they may not be able to detect and rupture early-stage fires in concealed locations within the battery box, resulting in the extinguishing agent not being able to accurately target the ignition point. This leads to poor firefighting accuracy and can easily cause the fire to escalate, failing to meet the high requirements of prefabricated energy storage modules for rapid and precise firefighting. Summary of the Invention

[0004] This invention addresses the shortcomings of existing technologies by providing a fire extinguishing device for use in prefabricated energy storage compartments.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0006] Fire extinguishing devices used in prefabricated energy storage compartments include:

[0007] Fire extinguishing agent cylinder group, used to store fire extinguishing agents;

[0008] Total flooding nozzles are used to spray the extinguishing agent from the extinguishing agent cylinder group into the entire cabinet.

[0009] The pack-level pipeline is equipped with a fire detection tube that extends into the battery box, and a low-leakage, high-seal suction valve is installed at the end of the fire detection tube.

[0010] The gas concentration analyzer is used to extract and analyze the gas inside the battery box. One end of it is connected to the pack-level pipeline and draws in gas through the low-leakage, high-sealing gas intake valve on the fire detection tube.

[0011] The three-way reversing valve has an extinguishing flow channel, an intake flow channel, and a piston rod. The piston rod is used to switch between the extinguishing flow channel and the intake flow channel. The extinguishing flow channel connects the extinguishing agent cylinder group to at least one of the pack-level pipeline and the total flooding nozzle. The intake flow channel is connected to the exhaust gas concentration analyzer through the pack-level pipeline.

[0012] As a preferred option, both the intake gas concentration analyzer and the fire detection tube fire extinguishing system are delivered via pack-level piping and fire detection tubes.

[0013] Preferably, the three-way reversing valve also includes a three-way valve body and a piston sleeve, with the piston sleeve extending into and securely connected to the three-way valve body; the piston rod moves up and down within the piston sleeve, switching between the intake flow channel and the extinguishing flow channel.

[0014] Preferably, the piston rod is provided with a seal. When the piston rod moves upward and causes the seal to seal with the piston sleeve, the fire extinguishing flow channel is opened. When the piston rod moves downward and causes the seal to seal with the fire extinguishing valve port of the three-way valve body, the suction flow channel is opened.

[0015] Preferably, the three-way valve body is provided with a first interface, a second interface and a third interface. The first interface and the second interface are normally connected. When the first interface is connected to the third interface through the piston sleeve, the air intake channel is opened. When the fire extinguishing valve port is connected to the first interface, the fire extinguishing channel is opened.

[0016] Preferably, the smoke concentration analyzer includes a first sensor and a smoke extraction fan. The smoke extraction fan draws air through a low-leakage, high-sealing suction valve at the end of the fire detection tube and delivers it to the first sensor for smoke concentration analysis.

[0017] Preferably, a one-way throttle valve is installed on the pack-level pipeline connected to one end of the gas concentration analyzer.

[0018] Preferably, a cabin-grade solenoid valve is installed on the pipe between the total flooding nozzle and the three-way reversing valve.

[0019] Preferably, the system also includes a fire cabinet and a fire controller. The fire cabinet is equipped with a second sensor for detecting gas. At least one end of the fire cabinet is equipped with an air intake fan, which is used to draw the gas in the cabinet into the fire cabinet for analysis by the second sensor. The fire controller uses the information from the second sensor to control the start and stop of the compartment solenoid valve.

[0020] Preferably, the extinguishing agent cylinder group, the three-way reversing valve, and the air extraction concentration analyzer are all installed inside the fire-fighting equipment box. At least one side wall of the fire-fighting equipment box is simultaneously equipped with a pack-level pipe joint and a pack-level pipe circulation joint. The pack-level pipe joint is connected to the three-way reversing valve through a pipe, and the pack-level pipe circulation joint is connected to the air extraction concentration analyzer through a pipe. One end of the pack-level pipe is connected to the pack-level pipe joint, and the other end is connected to the pack-level pipe circulation joint.

[0021] Preferably, the fire-fighting control box is equipped with a smoke detector, a heat detector, and a total flooding nozzle on at least one side wall. The electric fire-fighting control box is also equipped with a power supply box, a backup battery, and a fire controller. The power supply box is connected to the fire controller and provides it with a stable power supply. The backup battery is connected to the fire controller and provides it with backup power. The fire controller is connected to the air extraction concentration analyzer and can activate the fire extinguishing agent cylinder group based on the concentration information it provides.

[0022] This invention, by adopting the above technical solutions, has significant technical effects:

[0023] First, the gas concentration analyzer can extract and analyze the gas inside the battery box through the low-leakage, high-sealing suction valve on the fire detection tube. This design enables early detection of fire hazards inside the battery box. Compared to the method of only activating fire extinguishing after the fire detection tube is ignited and exploded, it can respond to the ignition point more quickly and detect the fire in time.

[0024] Secondly, by using the piston rod of a three-way reversing valve to switch between the extinguishing flow channel and the suction flow channel, the pipeline for extinguishing delivery and the pipeline for analyzing smoke concentration through suction are the same. This design simplifies the piping structure of the device while ensuring functionality, reduces the complexity of the piping layout, saves installation space in the prefabricated energy storage compartment, and facilitates future maintenance and repair of the piping. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the component installation structure inside the fire-fighting equipment box.

[0026] Figure 2 This is a schematic diagram of a fire extinguishing device that connects multiple battery boxes together.

[0027] Figure 3 This is a schematic diagram of the layout structure of the fire detection tube inside the battery box.

[0028] Figure 4 This is a cross-sectional view of the three-way reversing valve when it opens the intake air passage.

[0029] Figure 5 This is a cross-sectional view of the three-way reversing valve when it opens the fire extinguishing flow channel.

[0030] Figure 6 This is a schematic diagram of the internal structure of the gas concentration analyzer.

[0031] The names of the body parts referred to by the numbers in the above attached diagrams are as follows:

[0032] 10—Extinguishing agent cylinder assembly; 11—Total flooding nozzle; 12—Pack-class piping; 13—Fire detection tube; 14—Low-leakage, high-seal intake valve; 15—Exhaust gas concentration analyzer; 16—Three-way reversing valve; 17—Compartment-class solenoid valve; 18—Fire control box; 19—Power supply box; 20—Spare battery; 21—Fire controller; 22—Pack-class pipe joint; 23—Pack-class pipe recirculation joint; 24—Smoke detector; 25—Heat detector; 26—Second sensor; 27—Intake fan; 28—One-way throttle valve; 30—Battery box.

[0033] 151—First sensor, 152—Exhaust fan

[0034] 161—Fire extinguishing flow channel, 162—Suction flow channel, 163—Piston rod, 164—Three-way valve body, 165—Piston sleeve, 166—Fire extinguishing valve port, 167—First interface, 168—Second interface, 169—Third interface, 1610—Seal Detailed Implementation

[0035] The following is in conjunction with the appendix Figure 1-6 The invention will be further described in detail with reference to the embodiments.

[0036] Example 1

[0037] Fire extinguishing devices used in prefabricated energy storage compartments include:

[0038] The extinguishing agent cylinder group 10 is used to store extinguishing agent. The extinguishing agent cylinder group 10 includes an extinguishing agent cylinder body and a cylinder head valve. The cylinder head valve is activated by electromagnetic means, so that the extinguishing agent in the extinguishing agent cylinder body is released through the cylinder head valve.

[0039] The total flooding nozzle 11 is used to spray the extinguishing agent in the extinguishing agent cylinder group 10 into the entire cabinet. When most of the battery boxes 30 in the cabinet are on fire, the total flooding mode can be activated to extinguish the fire. The extinguishing agent in the extinguishing agent cylinder group 10 is directly released into the cabinet through the total flooding nozzle 11 to extinguish the fire.

[0040] Pack-level pipe 12 is equipped with a fire detection tube 13 that extends into the battery box 30. Multiple battery boxes 30 are installed in the cabinet, and each battery box 30 is equipped with a fire detection tube 13. The end of the fire detection tube 13 is equipped with a low-leakage high-sealing suction valve 14. The low-leakage high-sealing suction valve 14 allows the gas in the battery box 30 to be drawn into the fire detection tube 13 for gas analysis. Alternatively, when extinguishing a fire, the high-pressure extinguishing agent can seal the end of the fire detection tube 13 to ensure that the extinguishing agent is released from the combustion and explosion port.

[0041] The gas concentration analyzer 15 is used to extract and analyze the gas inside the battery box 30. One end of it is connected to the pack-level pipeline 12 and draws in gas through the low-leakage, high-sealing suction valve 14 on the fire detection tube 13. During gas extraction and analysis, the gas inside the battery box 30 passes through the low-leakage, high-sealing suction valve 14, then sequentially through the fire detection tube 13 and the pack-level pipeline 12, and finally to the gas concentration analyzer 15 for gas concentration analysis. This determines whether there is a fire inside the battery box 30 and whether the fire extinguishing agent cylinder group 10 needs to be activated. If there is a fire, the fire extinguishing agent cylinder group 10 is activated based on the feedback from the gas concentration analyzer 15. The fire extinguishing agent cylinder group 10 releases the fire extinguishing agent into the fire detection tube 13 in advance. When the fire detection tube 13 explodes, the fire can be extinguished quickly with a fast response speed. Alternatively, the fire extinguishing agent cylinder group 10 can be remotely activated according to the actual situation to extinguish the fire quickly by total flooding.

[0042] The three-way reversing valve 16 contains an extinguishing flow channel 161, an intake flow channel 162, and a piston rod 163. The piston rod 163 is used to switch between the extinguishing flow channel 161 and the intake flow channel 162. The extinguishing flow channel 161 connects the extinguishing agent cylinder group to at least one of the pack-level pipeline 12 and the total flooding nozzle 11. When pack-level fire suppression is required, the extinguishing agent is delivered through the extinguishing flow channel 161 and the pack-level pipeline 12 and then sprayed out from the opening corresponding to the fire detection tube 13 in the battery box 30 to extinguish the fire. When total flooding is required... In the event of a fire, the extinguishing agent is sprayed directly through the total flooding nozzle 11 after passing through the extinguishing channel 161. The suction channel 162 is connected to the gas concentration analyzer 15 via the pack-level pipe 12. Before a fire occurs or in the early stages of a fire, the gas concentration analyzer 15 periodically extracts and analyzes the gas in the battery box 30. The gas in the battery box 30 passes sequentially through the fire detection pipe 13, the pack-level pipe 12, and the suction channel 162 before entering the gas concentration analyzer 15 for concentration analysis. The piston rod 163 of the three-way reversing valve 16 switches between the extinguishing channel 161 and the suction channel 162, ensuring that the pipeline for extinguishing and delivering the gas and the pipeline for analyzing smoke concentration are the same, namely the pack-level pipe 12 and the fire detection pipe 13. This design simplifies the overall pipeline structure, reduces the number of components, saves installation space in the prefabricated energy storage compartment, reduces maintenance costs, and ensures efficient switching between the two functions, guaranteeing the accuracy of both extinguishing and gas analysis.

[0043] Both the gas extraction concentration analyzer 15 and the fire detection tube 13 use the pack-level pipe 12 and the fire detection tube as delivery pipelines. The gas extraction concentration analyzer 15 can extract the gas in the battery box 30 for analysis through the low-leakage high-sealing intake valve 14 on the fire detection tube 13, with the help of the pack-level pipe 12 and the fire detection tube 13. This allows for timely detection of abnormalities in the early stages of a fire and rapid response to the ignition point, avoiding the delay problem of only relying on the fire detection tube 13 to be burned and exploded before starting the fire suppression. At the same time, the piston rod 163 of the three-way reversing valve 16 switches the fire suppression flow channel 161 and the intake flow channel 162, so that the pack-level pipe 12 and the fire detection tube 13 can serve as both the intake delivery pipeline of the gas extraction concentration analyzer 15 and the fire suppression delivery pipeline of the fire detection tube 13. This achieves dual functions of the same pipeline, simplifies the structure, reduces space occupation, and improves the integration and practicality of the device.

[0044] The three-way reversing valve 16 also includes a three-way valve body 164 and a piston sleeve 165. The piston sleeve 165 extends into and is securely connected to the three-way valve body 164, and is threadedly connected to the three-way valve body 164. The piston rod 163 moves up and down within the piston sleeve 165, switching between the intake flow channel 162 and the extinguishing flow channel 161. During intake analysis, the piston rod 163 is mounted on the piston sleeve 165 by a spring and presses against the extinguishing valve port 166 of the three-way valve body 164, opening the intake flow channel 162 and closing the extinguishing flow channel 161. During fire extinguishing, the extinguishing agent cylinder group 10 is activated, and the high-pressure extinguishing agent is delivered to the three-way reversing valve 16. Under the action of high pressure, the piston rod 163 is opened, thereby opening the extinguishing flow channel 161, releasing the extinguishing agent, and simultaneously closing the intake flow channel 162. By switching the three-way reversing valve 16, the pack-level pipe 12 and the fire detection pipe 13 can be used as both delivery pipes for air extraction and analysis and delivery pipes for fire extinguishing, achieving dual functions on the same pipeline, simplifying the structure, reducing space occupation, and improving the integration of the device.

[0045] The piston rod 163 is provided with a seal 1610. In this embodiment, the seal is a split type, with two seals. One seal is used to seal the port of the piston sleeve 165, and the other seals the fire extinguishing valve port 166 of the three-way valve body 164. When the piston rod 163 moves upward and causes the seal to seal with the piston sleeve 165, the fire extinguishing flow channel 161 is opened; when the piston rod 163 moves downward and causes the seal to seal with the fire extinguishing valve port 166 of the three-way valve body 164, the suction flow channel 162 is opened. The sealing element on the piston rod 163 can achieve precise sealing and switching of different flow channels by moving it up and down: when the piston rod 163 moves up and drives the sealing element to seal with the piston sleeve 165, the extinguishing flow channel 161 can be reliably opened, ensuring that the extinguishing agent can be smoothly delivered to the ignition point through the pack-level pipeline 12 and the fire detection tube 13; when the piston rod 163 moves down and drives the sealing element to seal with the extinguishing valve port 166 of the three-way valve body 164, the suction flow channel 162 can be effectively opened, ensuring that the gas concentration analyzer 15 can accurately extract the gas in the battery box 30 through the low-leakage high-sealing suction valve 14 on the fire detection tube 13.

[0046] The three-way valve body 164 is provided with a first port 167, a second port 168 and a third port 169. The first port 167 and the second port 168 are normally connected. When the first port 167 is connected to the third port 169 through the piston sleeve 165, the suction channel 162 is opened, ensuring that the gas concentration analyzer 15 can stably extract the gas in the battery box 30 through the low-leakage high-sealing suction valve 14 on the fire detection tube 13. When the fire extinguishing valve port 166 is connected to the first port 167, the fire extinguishing channel 161 is opened, ensuring that the fire extinguishing agent is efficiently delivered to the ignition point through the pack-level pipeline 12 and the fire detection tube 13.

[0047] The exhaust gas concentration analyzer 15 includes a first sensor 151 and an exhaust fan 152. The first sensor 151 is a composite sensor that can detect at least two sets of data, including CO concentration, H2 concentration, smoke, CO2 concentration, and VOC content. The exhaust fan 152 draws air through the low-leakage, high-sealing suction valve 14 at the end of the fire detection tube 13 and delivers it to the first sensor 151 for smoke concentration analysis. This allows for timely detection of abnormalities within the battery box 30 in the early stages of a fire. Compared to existing technologies that rely on the fire detection tube exploding before extinguishing fires, this method can respond to the ignition point more quickly and provide early warning of fire risks. This active exhaust gas analysis method, combined with the precise detection of the first sensor 151, improves the accuracy of fire hazard assessment, avoids delays in extinguishing fires caused by passively waiting for the fire detection tube to rupture, and buys time for timely activation of the extinguishing flow channel 161 and delivery of extinguishing agent through the pack-level pipeline 12 and the fire detection tube 13, thereby improving overall fire extinguishing efficiency.

[0048] A one-way throttle valve 28 is installed on the pack-stage pipeline 12, which is connected to one end of the gas concentration analyzer 15. The one-way throttle valve 28 is used to adjust the size of the return gas passage of the pack-stage pipeline 12 to prevent short-circuiting of the airflow during intake. Figure 2 The middle arrow indicates the gas flow direction, prioritizing the intake of gas from the Pack-level pipe 12. Without this one-way throttle valve 28, gas would directly form a circulation in the pipe upstream of the Pack-level pipe 12, causing a short circuit in the gas flow.

[0049] A compartment-level solenoid valve 17 is installed on the pipeline between the total flooding nozzle 11 and the three-way reversing valve 16. The compartment-level solenoid valve 17 is used to activate the total flooding fire extinguishing mode. After the fire extinguishing agent is delivered through the three-way reversing valve 16 and the compartment-level solenoid valve 17, it is directly released into the cabinet through the total flooding nozzle 11.

[0050] The fire extinguishing system also includes a fire control cabinet 18 and a fire controller 21. The fire control cabinet 18 is equipped with a second gas sensor 26, which is a composite sensor capable of detecting at least two sets of data, including CO concentration, H2 concentration, smoke, CO2 concentration, and VOC content. Suction fans 27 are installed at both ends of the fire control cabinet 18. These fans draw gas from the cabinet into the fire control cabinet 18 for analysis by the second sensor 26. The fire controller 21 uses the information from the second sensor 26 to control the opening and closing of the compartment-level solenoid valve 17. By installing a second gas sensor 26 inside the fire-fighting control box 18 and installing suction fans 27 at both ends of the fire-fighting control box 18, the gas inside the cabinet is drawn into the fire-fighting control box 18 by the suction fans 27 for analysis by the second sensor 26. This allows for timely and accurate monitoring of the gas status inside the cabinet, providing a reliable basis for fire assessment. At the same time, the fire controller 21 controls the opening and closing of the compartment-level solenoid valve 17 based on the information from the second sensor 26, realizing the automation and precision of the fire-fighting process. It can quickly respond to fires and start or stop fire-fighting actions, improving the safety and reliability of the fire-fighting device.

[0051] The extinguishing agent cylinder assembly 10, the three-way reversing valve 16, and the extraction concentration analyzer 15 are all installed inside the fire control box 18. At least one side wall of the fire control box 18 is simultaneously equipped with a pack-level pipe connector 22 and a pack-level pipe circulation connector 23. In this embodiment, both side walls of the fire control box 18 are equipped with pack-level pipe connectors 22 and pack-level pipe circulation connectors 23. The pack-level pipe connector 22 is connected to the three-way reversing valve 16 via a pipe, and the pack-level pipe circulation connector 23 is connected to the extraction concentration analyzer 15 via a pipe. One end of the pack-level pipe 12 is connected to the pack-level pipe connector 22, and the other end is connected to the pack-level pipe circulation connector 23. The fire control box 18 integrates the extinguishing agent cylinder assembly 10, the three-way reversing valve 16, and the extraction concentration analyzer 15, achieving centralized arrangement of core components, further optimizing space utilization, and facilitating overall installation and maintenance. On one side wall of the fire-fighting equipment box 18, a pack-level pipe joint 22 and a pack-level pipe circulation joint 23 are installed simultaneously. They are connected to a three-way reversing valve 16 and an air extraction concentration analyzer 15 through pipes, and then form a closed loop connection with the pack-level pipe 12. This structure makes the layout of the pack-level pipe 12 more regular, avoids messy pipes, ensures smooth connection between the fire extinguishing flow channel 161 and the air extraction flow channel 162, and reduces the overall space occupied by the device.

[0052] Smoke detectors 24, heat detectors 25, and total flooding nozzles 11 are installed on both sides of the fire extinguishing cabinet 18. This fire extinguishing device is suitable for double-door cabinets. Smoke detectors 24 are used to sense the smoke concentration inside the cabinet, and heat detectors 25 are used to sense the temperature inside the cabinet. The smoke detectors 24 and heat detectors 25 are used to assist in judging the fire situation inside the cabinet, which facilitates the activation of the extinguishing agent cylinder group 10 by the fire controller 21. Centralized installation reduces the dispersed layout of various components inside the cabinet, and combined with the integration of other core components in the fire extinguishing cabinet 18, further optimizes the space utilization of the device.

[0053] The electrical fire suppression control box 18 also houses a power supply box 19, a backup battery 20, and a fire controller 21. The power supply box 19 is connected to the fire controller 21 and provides it with a stable power supply. The backup battery 20 is connected to the fire controller 21 and provides it with backup power, ensuring that the fire controller 21 can still operate normally in the event of a power outage or other emergencies. This guarantees the continuity and reliability of the device's operation and prevents the failure of fire monitoring and fire suppression activation due to power outages. The fire controller 21 is connected to the air extraction concentration analyzer 15 and can activate the fire extinguishing agent cylinder group 10 based on the concentration information it provides. This achieves a more proactive and intelligent fire suppression triggering mechanism, enabling timely response in the early stages of a fire and improving the timeliness and accuracy of fire suppression.

[0054] Working principle of gas concentration analysis

[0055] In the non-fire extinguishing state, the piston rod 163 of the three-way reversing valve 16 moves downward, causing the seal to seal with the fire extinguishing valve port 166 of the three-way valve body 164. At this time, the air intake channel 162 is opened: the first port 167 of the three-way valve body 164 is connected to the third port 169 through the piston sleeve 165, and the first port 167 is normally connected to the second port 168. The exhaust fan of the exhaust concentration analyzer 15 starts, actively extracting the gas in the battery box 30 through the pack-level pipeline circulation joint 23, the pack-level pipeline 12, the fire detection tube 13, and the low-leakage high-sealing intake valve 14 at the end of the fire detection tube, and sending it to the first sensor for smoke concentration analysis. The analysis data is transmitted to the fire controller 21 in real time, realizing early monitoring of fire hazards in the battery box and enabling earlier detection of fires.

[0056] The working principle of pack-level fire extinguishing

[0057] When the gas concentration analyzer 15 detects that the gas concentration exceeds the standard, the fire controller 21 determines that a fire has occurred and initiates the fire extinguishing procedure: the piston rod 163 of the three-way reversing valve 16 moves upward, causing the seal to seal with the piston sleeve 165, opening the fire extinguishing flow channel 161. At this time, the fire extinguishing valve port 166 is connected to the first interface 167. The fire extinguishing agent released by the fire extinguishing agent cylinder group 10 enters the fire detection tube 13 through the fire extinguishing flow channel 161 of the three-way reversing valve 16, the pack-level pipe joint 22, and the pack-level pipe 12, directly acting on the ignition point in the battery box 30.

[0058] The working principle of total flooding fire suppression

[0059] When the compartment-level solenoid valve 17 is opened, the extinguishing agent is simultaneously sprayed into the entire cabinet through the total flooding nozzle 11, achieving full-area fire suppression.

[0060] Under normal circumstances, the exhaust fan 152 inside the exhaust concentration analyzer 15 in the fire alarm control box 18 operates intermittently, drawing in gas from the battery box 30 through the low-leakage, high-seal intake valve 14 at the end of the built-in fire detection tube 13. The gas is then fed into the exhaust concentration analyzer 15 for analysis by the internal first sensor 151. Simultaneously, the airflow is returned to the battery box 30 through the pack-level pipeline circulation connector 23. When the intake gas exceeds the preset first-level alarm threshold as analyzed by the first sensor 151, the exhaust fan 152 automatically increases the intake frequency. When the pack-level discharge conditions are met, the fire controller 21 activates the extinguishing agent cylinder group 10. At this time, the three-way reversing valve 16 and the low-leakage, high-seal suction valve 14 at the end of the fire detection tube 13 in the pack enter the extinguishing agent discharge mode. The extinguishing agent is pre-filled into the pack-level pipeline 12. When the battery cells in the battery box 30 continue to heat up and become uncontrollable, reaching the temperature burst point of the fire detection tube 13, the fire detection tube 13 passively forms a release port near the uncontrolled battery cells. The extinguishing agent is discharged from this release port for point-to-point fire extinguishing and cooling. At the same time, the remaining chassis in the compartment undergo total flooding to release the extinguishing agent, preventing the fire in the battery box 30 from overflowing and causing the fire to spread. If the system was activated without being triggered by detection in the early stages, the extinguishing agent was pressurized in the pipeline and not directly released into the battery box 30, thus preventing accidental discharge.

[0061] Example 2

[0062] Example 2 is basically the same as Example 1, except that a smoke detector 24, a heat detector 25 and a total flooding nozzle 11 are installed on one side wall of the fire extinguishing cabinet 18. This fire extinguishing device is suitable for single-door cabinets.

[0063] Example 3

[0064] Example 3 is basically the same as Example 1, except that the seal 1610 on the piston rod 163 is an integral piece. The seal 1610 is provided with a groove. The seal 1610 is engaged with the protrusion on the piston rod 163 through the groove, so that both the upper and lower ends of the protrusion have sealing surfaces. The upper end of the seal 1610 seals the port of the piston sleeve 165, and the lower end of the seal 1610 seals the port of the fire extinguishing valve port 166.

Claims

1. A fire extinguishing device used in a prefabricated energy storage compartment, characterized in that, include: Fire extinguishing agent cylinder group (10) for storing fire extinguishing agent; Total flooding nozzle (11) is used to spray the extinguishing agent in the extinguishing agent cylinder group (10) into the entire cabinet; A pack-level pipe (12) is installed on which a fire detection tube (13) extends into the battery box (30), and a low-leakage high-seal suction valve (14) is installed at the end of the fire detection tube (13). The gas concentration analyzer (15) is used to extract and analyze the gas in the battery box (30). One end of it is connected to the pack-level pipeline (12) and the gas is drawn in through the low-leakage high-sealing suction valve (14) on the fire detection tube (13). A three-way reversing valve (16) is provided with an extinguishing flow channel (161), an intake flow channel (162) and a piston rod (163). The piston rod (163) is used to switch between the extinguishing flow channel (161) and the intake flow channel (162). The extinguishing flow channel (161) connects the extinguishing agent cylinder group to at least one of the pack-level pipeline (12) and the total flooding nozzle (11). The intake flow channel (162) is connected to the exhaust concentration analyzer (15) through the pack-level pipeline (12).

2. The fire extinguishing device for use in a prefabricated energy storage compartment according to claim 1, characterized in that: The gas concentration analyzer (15) for gas intake analysis and the fire detection tube (13) for fire extinguishing are all delivered through pack-level pipes (12) and fire detection tubes.

3. The fire extinguishing device for use in a prefabricated energy storage compartment according to claim 1, characterized in that: The three-way reversing valve (16) also includes a three-way valve body (164) and a piston sleeve (165). The piston sleeve (165) extends into the three-way valve body (164) and is fastened to it. The piston rod (163) moves up and down in the piston sleeve (165) and switches between the intake flow channel (162) and the extinguishing flow channel (161).

4. The fire extinguishing device for use in a prefabricated energy storage compartment according to claim 3, characterized in that: The piston rod (163) is provided with a seal (1610). When the piston rod (163) moves upward and causes the seal (1610) to seal with the piston sleeve (165), the fire extinguishing flow channel (161) is opened. When the piston rod (163) moves downward and causes the seal (1610) to seal with the fire extinguishing valve port (166) of the three-way valve body (164), the suction flow channel (162) is opened.

5. The fire extinguishing device for use in a prefabricated energy storage compartment according to claim 4, characterized in that: The three-way valve body (164) is provided with a first interface (167), a second interface (168) and a third interface (169). The first interface (167) and the second interface (168) are normally connected. When the first interface (167) is connected to the third interface (169) through the piston sleeve (165), the air intake channel (162) is opened. When the fire extinguishing valve port (166) is connected to the first interface (167), the fire extinguishing channel (161) is opened.

6. The fire extinguishing device for use in a prefabricated energy storage compartment according to claim 1, characterized in that: The smoke concentration analyzer (15) includes a first sensor (151) and a smoke extraction fan (152). The smoke extraction fan (152) draws air through the low-leakage high-seal suction valve (14) at the end of the fire detection tube (13) and delivers it to the first sensor (151) for smoke concentration analysis.

7. The fire extinguishing device for use in a prefabricated energy storage compartment according to claim 1, characterized in that: A one-way throttle valve (28) is installed on the pack-level pipe (12) connected to one end of the gas concentration analyzer (15).

8. The fire extinguishing device for use in a prefabricated energy storage compartment according to claim 7, characterized in that: A cabin-level solenoid valve (17) is installed on the pipe between the total flooding nozzle (11) and the three-way reversing valve (16); It also includes a fire cabinet (18) and a fire controller (21). The fire cabinet (18) is equipped with a second sensor (26) for detecting gas. At least one end of the fire cabinet (18) is equipped with an air intake fan (27). The air intake fan (27) is used to draw the gas in the cabinet into the fire cabinet (18) and provide it to the second sensor (26) for analysis. The fire controller (21) controls the start and stop of the compartment solenoid valve (17) based on the information from the second sensor (26).

9. The fire extinguishing device for use in a prefabricated energy storage compartment according to claim 8, characterized in that: The extinguishing agent cylinder group (10), the three-way reversing valve (16), and the air extraction concentration analyzer (15) are all installed inside the fire-fighting equipment box (18). At least one side wall of the fire-fighting equipment box (18) is simultaneously equipped with a pack-level pipe joint (22) and a pack-level pipe circulation joint (23). The pack-level pipe joint (22) is connected to the three-way reversing valve (16) through a pipe, and the pack-level pipe circulation joint (23) is connected to the air extraction concentration analyzer (15) through a pipe. One end of the pack-level pipe (12) is connected to the pack-level pipe joint (22), and the other end is connected to the pack-level pipe circulation joint (23).

10. The fire extinguishing device for use in a prefabricated energy storage compartment according to claim 8, characterized in that: The fire-fighting equipment box (18) is equipped with a smoke detector (24), a heat detector (25) and a total flooding nozzle (11) on at least one side wall. The electric fire-fighting control box (18) is also equipped with a power supply box (19) and a backup battery (20). The power supply box (19) is connected to the fire controller (21) and provides it with a stable power supply. The backup battery (20) is connected to the fire controller (21) and provides it with a backup power supply. The fire controller (21) is connected to the air extraction concentration analyzer (15) and can start the fire extinguishing agent cylinder group (10) through the concentration information provided by it.

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