Intelligent control integrated dry powder extinguishing system and using method and application thereof

Abstract

The invention relates to an intelligent control integrated dry powder extinguishing system and a using method and application thereof. The intelligent control integrated dry powder fire extinguishing system comprises a system starting bottle, a pressure reducing valve pipeline, a high-pressure gas storage device, a dry powder storage tank, an electromagnetic flowmeter and the like, the system starting bottle is connected with the high-pressure gas storage device, and the high-pressure gas storage device is connected with the dry powder storage tank through the pressure reducing valve pipeline and the electromagnetic flowmeter. Once the fire detector detects a fire, the electromagnetic valve of the driving gas cylinder is immediately opened, high-pressure gas in the driving gas cylinder pushes the valve of the high-pressure gas storage device to be opened, the high-pressure gas in the high-pressure gas storage device enters the dry powder storage tank through the pressure reducing valve pipeline and the electromagnetic flowmeter, and dry powder in the dry powder storage tank is sprayed outwards along with airflow to extinguish the fire. The fire extinguishing system has the advantages of being safe, explosion-proof, reusable, adjustable in dry powder injection pressure, capable of being automatically and manually operated and the like, not only improves the fireproof performance and the fire extinguishing reliability, but also reduces the use cost, and is suitable for fire protection of the large oil-immersed transformer.

Description

Technical Field

[0001] The present invention relates to the technical field of firefighting and emergency rescue, and in particular to an intelligent control integrated dry powder fire extinguishing system and a use method and application thereof. Background Art

[0002] Power safety is crucial to national economy and livelihoods, as well as economic and social development, and is a crucial component of national security. With the rapid development of direct current (DC) transmission technology, DC transmission systems have become a major channel for interregional and interprovincial energy transmission. Therefore, DC transmission system safety has become a crucial component of large-scale power grid security. Oil-immersed transformers are core equipment in high-voltage, extra-high-voltage, and ultra-high-voltage transmission projects. Their safe and stable operation is essential for the normal power supply of these projects. Large oil-immersed transformers above 220 kV have large oil storage volumes, high voltage levels, high energy consumption, and high operating temperatures. Failures or leaks in these transformers are highly susceptible to fires. Therefore, GB50229-2019, the "Design Fire Protection Standard for Thermal Power Plants and Substations," stipulates that oil-immersed transformers with a capacity of 125 MV·A must be equipped with water spray fire extinguishing systems or other fixed fire extinguishing devices. Currently, large oil-immersed transformers primarily utilize fixed fire extinguishing systems such as water spray and foam spray. However, in practical applications, these fixed fire extinguishing systems have been found to have long response times and are unable to extinguish initial fires.

[0003] Ultrafine dry powder fire extinguishing technology uses nitrogen as a power source to spray dry powder for fire extinguishing. This technology offers advantages such as timely response and high fire extinguishing efficiency, making it suitable for a variety of locations, including cable tunnels, mezzanines, and hydraulic stations. Ultrafine dry powder has gas-like properties, forming a relatively stable aerosol in the air upon release, enabling rapid fire extinguishing through either full or partial flooding. Existing dry powder fire extinguishing devices primarily include portable dry powder extinguishers, cart-mounted dry powder extinguishers, cabinet-mounted dry powder extinguishers, and hanging (wall-mounted) dry powder extinguishers. Portable and cart-mounted dry powder extinguishers can be carried to the scene of a fire and are typically used in homes or commercial spaces. Cabinet-mounted dry powder extinguishers can be placed in a corner of a protected area or against a wall, taking up minimal space. They are suitable for production and storage locations such as workshops, warehouses, oil depots, transformer rooms, and cable tunnels. Hanging dry powder extinguishers automatically activate upon sensing flames or high temperatures to rapidly extinguish fires, making them suitable for fire prevention and control in public, industrial, and commercial settings.

[0004] However, current dry powder fire extinguishing devices used for fire prevention and control present several issues and shortcomings. First, the extinguishing agent is prone to hardening and moisture during long-term storage, significantly reducing its firefighting effectiveness. Second, the spray pressure of existing dry powder fire extinguishers is typically preset at the factory and lacks gas flow monitoring equipment. This makes it impossible to optimize the dry powder-gas mixture ratio and dynamically adjust the spray pressure based on the application scenario and fire severity, severely impacting firefighting efficiency and effectiveness. Third, the pressure inside the tank storing the dry powder can rise abnormally if impacted or subjected to other adverse disturbances. However, existing dry powder storage tanks lack effective pressure relief and explosion-proof design, posing a safety hazard of tank explosion. Furthermore, existing dry powder fire extinguishing agents tend to settle after release, have poor diffusion properties, and are easily obscured, making it difficult to achieve an effective fire-extinguishing concentration inside electrical equipment and in gaps between wires and cables. Furthermore, they fail to meet the required immersion time requirements. More importantly, most dry powder fire extinguishing devices currently on the market are disposable, with no way to refill the powder or replace the cylinder, resulting in high costs. Summary of the Invention

[0005] The main purpose of the present invention is to overcome the above-mentioned problems existing in existing dry powder fire extinguishing devices. A new intelligent control integrated dry powder fire extinguishing system has been developed. This fire extinguishing system is equipped with a fire detector. Once a fire occurs, the dry powder storage tank can be quickly pressurized in two ways: automatically or manually. After the pressure reaches the preset injection pressure, ABC ultrafine dry powder is continuously injected to extinguish the fire. This not only improves fire extinguishing safety, but also can provide comprehensive and timely protection for power transmission engineering equipment.

[0006] To achieve the above objectives, the present invention provides an intelligent control integrated dry powder fire extinguishing system comprising: The system starts the bottle 1, which is used to automatically open the high-pressure gas storage device 3 to inflate the dry powder storage tank 4 to achieve powder spraying fire extinguishing when a fire occurs; A high-pressure gas storage device 3, which is connected to the system starter bottle 1 through a pipeline and is used to store high-pressure gas to provide power for dry powder spraying; The dry powder storage tank 4 is connected to the high-pressure gas storage device 3 through a pipeline and is used for spraying dry powder externally for fire extinguishing.

[0007] Furthermore, the system's starting cylinder 1 includes a driving gas cylinder 11, a solenoid valve 12, a fire detector 13, and a starting pipe 14. The driving gas cylinder 11 is connected to the high-pressure gas storage device 3 via the starting pipe 14. The solenoid valve 12 is provided at the gas outlet of the driving gas cylinder 11 or on the starting pipe 14. The fire detector 13 is located outside the system (i.e., near the protected location or equipment) and is electrically connected to the solenoid valve 12. Once the fire detector 13 detects a fire, it immediately sends an opening signal to the solenoid valve 12, causing it to open. The high-pressure gas in the driving gas cylinder 11 enters the high-pressure gas storage device 3 through the starting pipe 14, pushing its gas circuit valve to open. The high-pressure gas stored in the high-pressure gas storage device 3 enters the dry powder storage tank 4, carrying the dry powder and spraying it toward the fire point to extinguish the fire.

[0008] Furthermore, the high-pressure gas storage device 3 includes a high-pressure gas cylinder 32, a gas cylinder starting valve 33, and an air flow pipeline. The high-pressure gas cylinder 32 is connected to the dry powder storage tank 4 through the air flow pipeline. The gas cylinder starting valve 32 is arranged on the gas outlet or air flow pipeline of the high-pressure gas cylinder 32. The system starting bottle 1 is connected to the gas cylinder starting valve 32 and controls its opening and closing.

[0009] Furthermore, the number of high-pressure gas cylinders 32 is at least one (e.g., 2-5), and each high-pressure gas cylinder 32 is connected in parallel to a gas collection pipe 35 via a gas cylinder starting valve 32 and a gas collection hose 34. The gas collection pipe 35 is connected to the dry powder storage tank 4. The gas collection hose 34 and the gas collection pipe 35 together constitute the aforementioned airflow pipeline.

[0010] Furthermore, the dry powder storage tank 4 includes a dry powder tank 42, a dry powder tank interface 43, and a powder spraying pipe 46. One end of the dry powder tank interface 43 is connected to the interior of the dry powder tank 42, and the other end is directly or indirectly connected to the high-pressure gas storage device 3; one end of the powder spraying pipe 46 is connected to the interior of the dry powder tank 42, and the other end is directed toward the fire protection area or equipment.

[0011] Furthermore, the dry powder storage tank 4 also includes an electric contact pressure gauge 44, a pressure relief valve 47 and a base. The electric contact pressure gauge 44 and the pressure relief valve 47 are both connected to the interior of the dry powder tank 42. The dry powder tank 42 and the powder spraying pipe 46 are respectively fixed on the corresponding bases.

[0012] Furthermore, the system also includes a pressure reducing valve pipeline 2, the two ends of which are respectively connected to the high-pressure gas storage device 3 and the dry powder storage tank 4, for transmitting high-pressure gas and reducing the airflow pressure.

[0013] Furthermore, the pressure reducing valve pipeline 2 includes a connecting pipe, a pressure reducing valve 23, and a manual control valve 24. The connecting pipe connects the pressure reducing valve 23 and the manual control valve 24 in series, and a high-pressure gas storage device 3 and a dry powder storage tank 4 are respectively connected to both ends of the connecting pipe.

[0014] Furthermore, the system further comprises an electromagnetic flowmeter 5 , which is provided on the pressure reducing valve pipeline 2 and is located upstream of the dry powder storage tank 4 in the gas circuit.

[0015] The present invention also provides a method for using the above-mentioned intelligent control integrated dry powder fire extinguishing system, including: deploying the intelligent control integrated dry powder fire extinguishing system to a fire protection area or near equipment, using the fire detector 13 of the system start-up bottle 1 to monitor the fire situation in real time, and automatically opening the solenoid valve 12 of the driving gas cylinder 11 once a fire is detected. The high-pressure gas in the driving gas cylinder 11 pushes the valve of the high-pressure gas storage device 3 to open, and the high-pressure gas in the high-pressure gas storage device 3 enters the dry powder storage tank 4 through the pressure reducing valve pipeline 2 and the electromagnetic flowmeter 5. The dry powder stored in the dry powder storage tank 4 is sprayed outward with the airflow to achieve fire extinguishing.

[0016] A third object of the present invention is to provide an application of the above-mentioned intelligent control integrated dry powder fire extinguishing system in fire protection of power systems (such as large oil-immersed transformers above 220kV).

[0017] The present invention utilizes the system start-up bottle 1 to monitor the occurrence of fire in real time, and provides an opening control signal and driving force for the high-pressure gas storage device 3. In addition, in order to improve the safety of the dry powder storage tank 4, a pressure relief and explosion-proof device is also designed. In order to cope with fire accidents of different dangerous levels, an adjustable pressure valve is provided on the dry powder tank to facilitate manual adjustment of the pressure of the sprayed dry powder. The pressurization system of the dry powder tank is composed of a plurality of nitrogen cylinders connected in parallel, which can ensure that the air pressure and airflow supply are sufficient, and the dry powder tank can be opened to replenish dry powder, so that it can be used repeatedly. A gas flow meter 5 is also provided on the air flow conveying pipeline, which is used to read the amount of nitrogen pressurized in the dry powder tank. By weighing the amount of dry powder in the dry powder tank and combining the reading of the gas flow meter, the gas-solid ratio during dry powder spraying can be quickly calculated. The powder spraying pipe at the bottom of the dry powder tank can be laid in a direction according to the needs of the fire extinguishing scene, so as to realize accurate fire extinguishing in open spaces and meet the reliable fire protection needs of power transmission engineering equipment in open areas.

[0018] Compared with the existing similar technologies, the improved effects of the present invention are mainly reflected in the following points: (1) The present invention can be used for fire protection of large oil-immersed transformers and fire extinguishing inside power equipment. By spraying dry powder through an external pipe, the powder spraying pipe can be laid in a direction to the key parts of the transformer (such as the oil pillow and bushing). The dry powder type (such as ABC ultrafine dry powder) and spray pressure can be changed according to the transformer fire condition (oil fire or arc fire) to ensure that the dry powder can penetrate the gaps in the power equipment. It has the advantages of good fire protection, low cost, simple operation, and easy implementation.

[0019] (2) The present invention is designed with safety and explosion-proof devices such as a pressure relief valve and an electric contact pressure gauge for the dry powder tank, which doubles up the system safety. Once the pressure inside the tank is detected to be too high, the pressure relief valve will automatically open to release the pressure inside the tank, thus ensuring the safety of the entire fire extinguishing system.

[0020] (3) The dry powder tank selected in the present invention has a large storage capacity, and the dry powder can be replenished or replaced according to different application scenarios. In addition, the size and number of high-pressure gas cylinders can also be flexibly replaced according to actual conditions, ensuring that the fire extinguishing equipment can be reused many times, greatly reducing costs.

[0021] (4) The present invention can obtain an accurate dry powder injection gas-solid ratio by monitoring the dry powder amount and gas flow rate in the dry powder tank, and can provide scientific guidance and factual basis for fire analysis.

[0022] (5) The spray pressure of the dry powder in the present invention can be flexibly adjusted within the range of 0 to 2.5 MPa. Therefore, the present invention has the ability to pre-set the appropriate dry powder spray pressure according to the size of the fire that may occur at the site, which is conducive to achieving precise fire extinguishing and avoiding wasting dry powder resources.

[0023] (6) The fire extinguishing system of the present invention has two fire extinguishing modes: automatic and manual. The system start bottle is equipped with a fire detector. Once a fire occurs, the fire extinguishing program can be automatically started. If the fire detector fails, the fire extinguishing program can be started by pulling down the manual control valve, thereby maximizing the fire extinguishing performance and reliability of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the overall structure of the intelligent control integrated dry powder fire extinguishing system of the present invention.

[0025] Figure 2 This is a schematic diagram of the system starter bottle structure of the intelligent control integrated dry powder fire extinguishing system of the present invention.

[0026] Figure 3 This is a schematic diagram of the pressure reducing valve piping structure of the intelligent control integrated dry powder fire extinguishing system of the present invention.

[0027] Figure 4 This is a schematic structural diagram of the high-pressure gas storage device of the intelligent control integrated dry powder fire extinguishing system of the present invention.

[0028] Figure 5 This is a schematic diagram of the dry powder storage tank structure of the intelligent control integrated dry powder fire extinguishing system described in the present invention.

[0029] Figure 6 This is a schematic diagram of the electromagnetic flowmeter structure of the intelligent control integrated dry powder fire extinguishing system of the present invention.

[0030] Figure 1: 1-system start bottle, 2-pressure reducing valve pipeline, 3-high-pressure gas storage device, 4-dry powder storage tank, 5-electromagnetic flowmeter; 11-driving gas cylinder, 12-electromagnetic valve, 13-fire detector, 14-starting pipeline; 21-support frame, 22-threaded connecting pipe, 23-pressure reducing valve, 24-manual control valve; 31-stainless steel fixing plate, 32-high-pressure gas cylinder, 33-gas cylinder start valve, 34-Gas collecting hose, 35-Gas collecting pipeline; 41-Dry powder tank base, 42-Dry powder tank, 43-Dry powder tank interface, 44-Electric contact pressure gauge, 45-Powder spraying pipeline base, 46-Powder spraying pipeline, 47-Pressure relief valve; 51-Air inlet pipeline, 52-L-type connecting pipe, 53-Inlet end flange connection surface, 54-Electromagnetic flow sensor, 55-Outlet end flange connection surface, 56-Gas transmission pipeline. DETAILED DESCRIPTION

[0031] To enable those skilled in the art to fully understand the technical solutions and beneficial effects of the present invention, the following is a further detailed description with reference to specific embodiments and accompanying drawings. It should be emphasized that the following embodiments are merely preferred embodiments of the present invention and do not constitute any limitation of the present invention. Simple improvements made by anyone on this basis will fall within the scope of protection of the present invention.

[0032] The inventor team investigated various types of dry powder fire extinguishing devices currently on the market and found that the following problems are common: (1) The air volume of a single fire extinguisher is fixed, which not only limits the scope of use but also greatly restricts the effective spraying time; (2) Most existing dry powder fire extinguishers are disposable products. After use or after being stored for a long time, the dry powder in the tank cannot be replenished or replaced, and basically cannot be reused; (3) The fire extinguisher tank is a pressurized closed container. Excessive air pressure will cause the tank to explode, but existing products lack effective explosion-proof measures; (4) There is only a fixed spray pressure, and it is impossible to dynamically adjust the spray pressure according to the application scenario or the size of the fire to control the dry powder spray volume, which easily leads to resource waste. In response to the above problems, the inventor team conducted in-depth research and developed an intelligent control integrated dry powder fire extinguishing system that is simple to operate, economical and safe. This fire extinguishing system is particularly suitable for fire protection of power facilities such as large oil-immersed transformers.

[0033] The overall structure of the intelligent control integrated dry powder fire extinguishing system and the structure of each sub-component are as follows: Figure 1-6The entire fire extinguishing system is mainly composed of a system starter bottle 1, a pressure reducing valve pipeline 2, a high-pressure gas storage device 3, a dry powder storage tank 4, and an electromagnetic flowmeter 5. The functions / roles of these components are as follows: the system starter bottle 1 is mainly used to automatically start the dry powder fire extinguishing device; the pressure reducing valve pipeline 2 is mainly responsible for connecting the high-pressure gas storage device 3 and the dry powder storage tank 4 and reducing the airflow pressure in the pipeline; the high-pressure gas storage device 3 is mainly responsible for providing the high-pressure inert gas (such as nitrogen N2) required for dry powder injection; the dry powder storage tank 4 is mainly used to store and replenish dry powder; the electromagnetic flowmeter 5 is mainly used to read the flow rate of the injection airflow, and then calculate the gas-to-solid ratio based on the amount of dry powder filled in the dry powder storage tank 4 and the high-pressure gas flow rate, providing scientific guidance for subsequent parameter optimization and accident analysis.

[0034] The specific structure of the system start bottle 1 is as follows Figure 2 As shown, it mainly includes a driving gas cylinder 11, a solenoid valve 12, a fire detector 13, and a starting pipe 14. The driving gas cylinder 11 is connected to the high-pressure gas storage device 3 through the starting pipe 14. The solenoid valve 12 is fixed at the gas outlet of the driving gas cylinder 11. The fire detector 13 is arranged around the power facilities and is electrically connected to the solenoid valve 12 to facilitate the control of its open / closed state. When the ambient temperature or smoke concentration reaches a threshold, the fire detector 13 can automatically send an opening electrical signal to the solenoid valve 12, thereby opening the driving gas cylinder 11 for gas supply. The high-pressure gas inside the driving gas cylinder is transported to the high-pressure gas storage device 3 through a pipeline and opens its valve, allowing the inert gas stored in the high-pressure gas cylinder to inflate and pressurize the dry powder storage tank 4. The ABC ultrafine dry powder in the dry powder storage tank 4 is continuously ejected outward with the high-pressure airflow to extinguish the fire.

[0035] The specific structure of the pressure reducing valve pipeline 2 is as follows Figure 3 As shown, it primarily comprises a support frame 21, a threaded connecting pipe 22, a pressure reducing valve 23, and a manual control valve 24. The pressure reducing valve line 2 is secured to the ground, wall, or mounting frame / base via the support frame 21. Threaded connecting pipes 22 are connected to both ends of the pressure reducing valve 23. The left threaded connecting pipe 22 is connected to the electromagnetic flowmeter 5 and the dry powder storage tank 4, while the right threaded connecting pipe 22 is connected to the manual control valve 24 and then to the high-pressure gas storage device 3. The pressure reducing valve 23 regulates the pressure of the high-pressure gas released from the high-pressure gas cylinder. Pressure gauges are located on both sides of the valve for easy reading of the pressure adjustment indication. As a backup, if the automatic start device (i.e., the system start bottle) fails, manually turning the manual control valve 24 90° can also initiate the dry powder fire extinguishing process.

[0036] The structure of the high pressure gas storage device 3 is as follows: Figure 4As shown, it mainly includes a stainless steel fixing plate 31, a high-pressure gas cylinder 32, a gas cylinder starting valve 33, a gas collecting hose 34, and a gas collecting pipe 35. The number of high-pressure gas cylinders 32 can be set to 1 or more (such as 2-5) according to actual needs. When multiple high-pressure gas cylinders are set, these high-pressure gas cylinders are fixed side by side on the wall or frame by the stainless steel fixing plate 31. Each high-pressure gas cylinder is provided with a gas cylinder starting valve 33. The starting pipe 14 of the system starting bottle 1 is connected to the gas cylinder starting valve 33 and controls its opening and closing. In addition, the high-pressure gas cylinder 32 is also connected to the gas collecting pipe 35 in parallel through the gas collecting hose 34 to ensure that the high-pressure gas inside each high-pressure gas cylinder can flow into and merge into the gas collecting pipe 35. The other end of the gas collecting pipe 35 is connected to the pressure reducing valve pipeline 2.

[0037] The structure of dry powder storage tank 4 is as follows Figure 5 As shown, it primarily comprises a dry powder tank base 41, a dry powder tank 42 (120L capacity), a dry powder tank interface 43, an electric contact pressure gauge 44, a powder spray pipe base 45, a powder spray pipe 46 (DN20), and a pressure relief valve 47. The dry powder tank 42 is secured to the dry powder tank base 41, which is in turn secured to the ground, a pedestal, or a bracket, providing stable and reliable support for the dry powder tank 42. The top of the dry powder tank 42 is equipped with a dry powder tank interface 43, an electric contact pressure gauge 44, and a pressure relief valve 47, which communicate with the tank interior. The dry powder tank interface 43 is connected to the gas collection pipe 35 of the high-pressure gas storage device 3 via an electromagnetic flowmeter 5, which is used to inflate the tank and provide power for the dry powder spray. The electric contact pressure gauge 44 is used to release the ABC ultrafine dry powder in the tank at a set constant pressure, ensuring a balanced dry powder spray and enhancing fire extinguishing effectiveness. Pressure relief valve 47 is primarily used to promptly release the high pressure within dry powder tank 44 in emergency situations (e.g., due to mis-startup or blockage of dry powder tank 4), ensuring the safety and effectiveness of the entire system. A powder spraying pipe 46 is located at the bottom of dry powder tank 42, connecting to the interior of the tank. A powder spraying pipe base 45 is fixedly connected to and supports powder spraying pipe 46. The outlet of powder spraying pipe 46 faces electrical facilities requiring protection, such as cables and oil-immersed transformers.

[0038] The structure of the electromagnetic flowmeter 5 is as follows Figure 6As shown, it primarily comprises an air intake pipe 51 (DN40), an L-shaped connecting pipe 52, an inlet flange connection 53, an electromagnetic flow sensor 54, an outlet flange connection 55, and a gas transmission pipe 56. The air intake pipe 51 is connected to the pressure reducing valve line 2 and the L-shaped connecting pipe 52 at both ends, respectively. The electromagnetic flow sensor 54 is also provided with an inlet flange connection 53 and an outlet flange connection 55 at both ends. The ends of the L-shaped connecting pipe 52 and the gas transmission pipe 56 are both equipped with matching flange connections. Flanges ensure a secure connection between the L-shaped connecting pipe 52, the gas transmission pipe 56, and the electromagnetic flow sensor 54. When the decompressed high-pressure gas flows through the electromagnetic flow sensor 54, it reads and displays the instantaneous and cumulative flow rates in real time.

[0039] The method of using the intelligent control integrated dry powder fire extinguishing system is as follows: after the fire detector 13 equipped with the system starting bottle 1 detects a fire, it automatically sends a starting electrical signal to the solenoid valve 12. After the solenoid valve 12 is started, the valve of the driving gas cylinder 11 is opened, and the high-pressure gas inside the driving gas cylinder 11 is transported to the gas cylinder starting valve 33 of the high-pressure gas storage device 3 through the starting pipe 14; the gas cylinder starting valve 33 is partially or completely opened under the pressure of the high-pressure gas, and the inert gas (N2) stored in each high-pressure gas cylinder 32 is collected into the gas collecting pipe 35 through the gas collecting hose 34 and flows together into the pressure reducing valve 23 (the pressure is set in advance) of the pressure reducing valve pipeline 2. The pressure reducing valve reduces the gas inlet pressure to the required outlet pressure (adjustable from 0 to 2.5 MPa) and keeps it stable; at the same time, the trigger pressure value for dry powder release is set through the electric contact pressure gauge. When the pressure in the dry powder storage tank reaches the set value, powder is automatically sprayed to extinguish the fire. The pressure-regulated gas is injected into dry powder tank 4 and thoroughly mixed with the ABC ultrafine dry powder within. When the mixed pressure within dry powder tank 4 reaches the preset target value, it is evenly sprayed through powder spray pipe 46, achieving the desired fire extinguishing effect. In any case, if the pressure within dry powder tank 4 is too high, triggering an alarm, pressure relief valve 47 can be opened manually or automatically to relieve the pressure. If the ABC ultrafine dry powder within dry powder tank 4 is insufficient, it can be replenished through dry powder tank interface 43, ensuring the long-term, reusable use of the entire system.

[0040] The intelligent integrated dry powder fire extinguishing system provided by the present invention has many advantages such as simple structure, safety and reliability, adjustable dry powder injection pressure, reusability, and low cost, and can provide effective fire protection for large oil-immersed transformers.

Claims

1. An intelligent control integrated dry powder fire extinguishing system, characterized by: The system includes a system start bottle, a high-pressure gas storage device, and a dry powder storage tank. The system start bottle is connected to the high-pressure gas storage device through a pipeline and is used to controllably start the high-pressure gas storage device to deflate; the high-pressure gas storage device is connected to the dry powder storage tank through a pipeline and is used to inflate the dry powder storage tank so that it sprays dry powder to extinguish the fire.

2. The system according to claim 1, wherein: The system start-up bottle includes a driving gas cylinder, a solenoid valve, a fire detector, and a starting pipeline. The driving gas cylinder is connected to a high-pressure gas storage device through a starting pipeline. A solenoid valve is provided at the gas outlet of the driving gas cylinder or on the starting pipeline. The fire detector is electrically connected to the solenoid valve and controls its opening or closing.

3. The system according to claim 1, wherein: The high-pressure gas storage device includes a high-pressure gas cylinder, a gas cylinder starting valve, and an air flow pipeline. The high-pressure gas cylinder is connected to the dry powder storage tank through the air flow pipeline. The gas cylinder starting valve is arranged at the gas outlet of the high-pressure gas cylinder or on the air flow pipeline. The system starting bottle is connected to the gas cylinder starting valve and controls its opening and closing.

4. The system according to claim 3, wherein: The number of high-pressure gas cylinders is at least one, and each high-pressure gas cylinder is connected to a gas collecting pipeline in parallel through a gas cylinder starting valve and a gas collecting hose, and the gas collecting pipeline is connected to a dry powder storage tank.

5. The system according to claim 1, wherein: The dry powder storage tank includes a dry powder tank, a dry powder tank interface, and a powder spraying pipe. One end of the dry powder tank interface is connected to the interior of the dry powder tank, and the other end is directly or indirectly connected to the high-pressure gas storage device; one end of the powder spraying pipe is connected to the interior of the dry powder tank, and the other end is directed toward the fire protection place or equipment.

6. The system according to claim 5, wherein: The dry powder storage tank further includes an electric contact pressure gauge, a pressure relief valve and a base. The electric contact pressure gauge and the pressure relief valve are both connected to the interior of the dry powder tank. The dry powder tank and the powder spraying pipeline are respectively fixed on the base.

7. The system according to claim 1, wherein: The system also includes a pressure reducing valve pipeline, which includes a connecting pipe, a pressure reducing valve, and a manual control valve. The connecting pipe connects the pressure reducing valve and the manual control valve in series, and a high-pressure gas storage device and a dry powder storage tank are respectively connected to both ends of the connecting pipe.

8. The system according to claim 7, wherein: The system further comprises an electromagnetic flowmeter, which is arranged on the pressure reducing valve pipeline and is located upstream of the dry powder storage tank in the gas circuit.

9. The method of using the intelligent control integrated dry powder fire extinguishing system is characterized by The method includes: deploying an intelligent control integrated dry powder fire extinguishing system to a fire protection site or around equipment, the system starts the fire detector of the cylinder to monitor the fire situation in real time, and automatically opens the solenoid valve of the driving gas cylinder once a fire is detected. The high-pressure gas in the driving gas cylinder pushes the valve of the high-pressure gas storage device to open, and the high-pressure gas in the high-pressure gas storage device enters the dry powder storage tank through the pressure reducing valve pipeline and the electromagnetic flowmeter, and the dry powder in the dry powder storage tank is sprayed outward with the airflow to extinguish the fire.

10. Application of the intelligent control integrated dry powder fire extinguishing system according to any one of claims 1 to 9 in fire protection of power systems.

Images