A gas fire extinguishing system and its fire extinguishing method

Abstract

This application relates to a gas fire extinguishing system and its fire extinguishing method, which includes a fire extinguishing agent storage container. The fire extinguishing agent storage container is connected with a fire extinguishing nozzle through a pipeline. A control valve is connected to the pipeline, and at the same time, a controller is connected to the control valve. A container valve is installed on the fire extinguishing agent storage container. The container valve includes a body and a valve core. An air outlet is opened on the body, and the air outlet is communicated with the pipeline. A control chamber and a connection chamber are arranged inside the body. The valve core includes a starting piston and a main piston fixedly connected. The main piston is located in the connection chamber and is used to control the opening and closing of the container valve. The starting piston is located in the control chamber. The starting piston divides the control valve into a pushing area and a balancing area. When the container valve is in the off state, the pushing area is communicated with the inside of the fire extinguishing agent storage container. A connecting pipe is arranged between the balancing area and the pipeline. An overflow valve for stabilizing the pressure in the connecting pipe is connected to the connecting pipe through a first branch pipe. This application improves the storage time of the fire extinguishing agent in the fire extinguishing agent storage container.

Description

Technical Field

[0001] This application relates to the technical field of building fire protection, and particularly to a gas fire extinguishing system and its fire extinguishing method. Background Art

[0002] Building fire protection is mainly used to ensure the property and life safety inside the building structure, and to handle the fire accidents caused by power failures or human activities inside the building. For the gas fire extinguishing system, it mainly uses non-combustible gases, also known as fire extinguishing agents, to fill the enclosed space, so that the fire lacks the oxygen for combustion in time to achieve the purpose of extinguishing the fire. In the gas fire extinguishing system, the main fire extinguishing agent used is gas, which causes less damage to the fire extinguishing area, especially used in distribution rooms, computer rooms, oil depots, libraries, etc.

[0003] A related technology discloses an automatic fire extinguishing device applicable to an equipment electrical room, including a detection sensor, a controller, and an automatic fire extinguishing mechanism that are electrically connected. The detection sensor is provided with a smoke-type fire detector and a light-type fire detector connected to the controller. The automatic fire extinguishing mechanism is provided with a fire extinguishing agent storage container, a control valve connected to the controller, and a fire extinguishing nozzle. When in use, after the smoke-type fire detector and the light-type fire detector detect a fire, the controller then opens the control valve, and the fire extinguishing agent in the fire extinguishing agent storage container is ejected from the fire extinguishing nozzle under the action of pressure, so that the fire extinguishing agent fills the electrical room to achieve the effect of extinguishing the fire.

[0004] However, in the above structure, the control valve directly connected to the controller has poor sealing performance, and it is easy for the fire extinguishing agent in the fire extinguishing agent storage container to leak. Summary of the Invention

[0005] In order to increase the storage time of the fire extinguishing agent in the fire extinguishing agent storage container, this application provides a gas fire extinguishing system and its fire extinguishing method.

[0006] This application provides a gas fire extinguishing system, adopting the following technical solution:

[0007] A gas fire extinguishing system includes a fire extinguishing agent storage container, a control valve, a controller, a smoke-type fire detector and a light-sensitive fire detector connected to the controller. The fire extinguishing agent storage container is connected with a fire extinguishing nozzle through a pipeline. The control valve is connected to the pipeline, and at the same time the controller is connected to the control valve. A container valve is installed on the fire extinguishing agent storage container. The container valve includes a body and a valve core. An air outlet is formed on the body, and the air outlet is communicated with the pipeline. A control chamber and a connection chamber are arranged inside the body. The valve core includes a starting piston and a main piston fixedly connected. The main piston is located in the connection chamber and is used to control the on-off of the container valve. The starting piston is located in the control chamber. The starting piston divides the control chamber into a pushing area and a balancing area. When the container valve is in the off state, the pushing area is communicated with the inside of the fire extinguishing agent storage container. A connecting pipe is arranged between the balancing area and the pipeline. A pressure relief valve for stabilizing the pressure in the connecting pipe is connected to the connecting pipe through a first branch pipe.

[0008] By adopting the above technical solution, during use, the fire extinguishing agent storage container is connected to the pipeline through the installed container valve. The control valve is installed on the pipeline. The container valve includes a body and a valve core. A control chamber and a connection chamber are arranged inside the body. The starting piston of the valve core is arranged in the control chamber, so that the starting piston divides the control chamber into a pushing area and a balancing area. The pushing area is communicated with the inside of the fire extinguishing agent storage container, so that the pushing area is kept in a state of higher pressure. The balancing area is communicated with the pipeline through a connecting pipe, so that the pipeline is used to control the pressure release in the balancing area through the control valve. At the same time, the pressure in the connecting pipe is stabilized by the pressure relief valve. When the control valve is in the normal state of disconnecting the pipeline, the pressure relief valve stabilizes the pressure in the connecting pipe, so that the starting piston is in the position of closing the container valve by the valve core in the control chamber. When the control valve is opened, the pressure in the connecting pipe drops, so that the pressure in the balancing area decreases. Then, the pressure on the control chamber side pushes the valve core to move and opens the container valve, thereby releasing the fire extinguishing agent in the fire extinguishing agent storage container. The starting piston is pushed by the pressurized gas in the fire extinguishing agent storage container, so that the main piston can seal the fire extinguishing agent storage container better, thereby increasing the storage time of the fire extinguishing agent in the fire extinguishing agent storage container. At the same time, because there is pressure in the pipeline and it is controlled by the pressure relief valve, on the one hand, it can prevent the pipeline seal from being damaged due to excessive pressure in the pipeline, and on the other hand, it can also inhibit the leakage of the fire extinguishing agent in the fire extinguishing agent storage container. At the same time, the state of reducing the pressure in the pipeline is the state of opening the container valve, which reduces the complexity of the structure and the poor stability caused by using other pneumatic pushes.

[0009] Preferably, an intermediate rod is fixedly arranged on the starting piston. The diameter of the intermediate rod is smaller than that of the starting piston. One end of the intermediate rod away from the starting piston is used for connecting to the main piston. A first spring is sleeved on the intermediate rod. One end of the first spring abuts against the starting piston, and the other end abuts against the inner wall of the control chamber and acts on the same side of the starting piston together with the pressure in the balance area.

[0010] By adopting the above technical solution, the first spring is sleeved on the intermediate rod. The first spring and the pressure in the balance area act together on the starting piston to balance the pressure exerted by the pushing area on the piston. Furthermore, the first spring can reduce the pressure in the balance area, lower the requirement for the pressure in the balance area, and then the sealing performance between the pipeline and the connecting pipe can be reduced, thus reducing costs.

[0011] Preferably, a second spring is arranged in the pushing area. The elastic force of the second spring is opposite to that of the first spring. The second spring and the pressure in the pushing area act on the same side of the starting piston together.

[0012] By adopting the above technical solution, the second spring is arranged in the pushing area, and the elastic force of the second spring is opposite to that of the first spring. When the pressure in the fire extinguishing agent storage container decreases, the second spring is compressed. Furthermore, the elastic force of the second spring is used to make up for part of the movement of the starting piston caused by the decrease in the pressure in the fire extinguishing agent storage container, so that the main piston can still maintain the disconnected state from the container valve after a small amount of leakage occurs in the fire extinguishing agent storage container.

[0013] Preferably, an upper cover plate is arranged at one end of the body, and a lower cover plate is arranged at the other end. The upper cover plate is used to seal the control chamber, and the lower cover plate is used to seal the connection chamber. A bend is formed in the body. One end of the bend is connected to the side of the lower cover plate away from the control chamber, and the other end is connected to the side wall of the control chamber; the air outlet is located at the side part of the connection chamber away from the lower cover plate and is communicated with the connection chamber. The intermediate rod and the main piston are fixedly connected by threads.

[0014] By adopting the above technical solution, the upper cover plate is used to seal the control chamber, the lower cover plate is used to seal the connection chamber, and the intermediate rod and the main piston are connected by threads. Furthermore, in the state where the main piston and the intermediate rod are separated, the main piston and the starting piston can be inserted into the body from the connection chamber and the control chamber respectively, which is convenient for the connection between the valve core and the body. At the same time, one end of the bend is connected to the side wall of the control chamber, which reduces the reverse thrust on the main piston caused by the decrease in the pressure in the fire extinguishing agent storage container and reduces the structural influence on the starting piston in the control chamber.

[0015] Preferably, a first air passage is provided at the center of the valve core, and a second air passage is provided radially on the main piston. The first air passage communicates with the pushing area. A ring groove is formed on the middle side wall of the main piston. The second air passage communicates with the ring groove, and the second air passage communicates with the first air passage.

[0016] By adopting the above technical solution, the first air passage communicates with the second air passage, and a ring groove is provided at the position of the second air passage, so that the ring groove, the second air passage and the first air passage communicate the fire extinguishing agent storage container with the pushing area, facilitating the communication between the pushing area and the fire extinguishing agent storage container. At the same time, the ring groove can ensure that the communication between the fire extinguishing agent storage container and the pushing area is not affected after the main piston rotates.

[0017] Preferably, an air inlet is provided on the body, and a three-way pipe is installed on the air inlet. One end of the three-way pipe is connected to a pressure gauge, and the other end is connected to a sealing nut.

[0018] By adopting the above technical solution, a three-way pipe is installed on the air inlet. When the sealing nut is opened, the position connected by the sealing nut facilitates the replenishment of the fire extinguishing agent into the fire extinguishing agent storage container through the three-way pipe, and the pressure gauge is used to conveniently observe the pressure in the fire extinguishing agent storage container.

[0019] Preferably, the air inlet is located on one side of the connection chamber where the air outlet is provided. When the main piston moves towards the air outlet end, the main piston communicates the air inlet with the bend through the ring groove. A manual pump is fixedly provided on the body, and the manual pump communicates with the connecting pipe through a second branch pipe. A manual valve is provided at the position between the overflow valve and the pipeline on the connecting pipe.

[0020] By adopting the above technical solution, when the manual pump works, first close the manual valve and at the same time increase the overflow pressure of the overflow valve, so that the manual pump can communicate with the balance area through the second branch pipe, the pressure in the balance area increases, so that the main piston moves towards the air outlet side, and the bend is communicated with the air inlet through the ring groove, and then the pressure of the pressure gauge can be observed and the fire extinguishing agent can be filled into the fire extinguishing agent storage container, facilitating the filling of the fire extinguishing agent storage container and the observation of the pressure gauge.

[0021] Preferably, the control valve is a manual solenoid valve.

[0022] By adopting the above technical solution, the control valve is selected as a manual solenoid valve, and the manual solenoid valve has a manual function at the same time, so as to facilitate opening the control valve in time through the manual function when a fire is discovered manually.

[0023] Preferably, the controller is connected to a storage battery.

[0024] By adopting the above technical solution, the controller is connected to a storage battery. The storage battery can store electrical energy under normal conditions. When a fire breaks out or a power outage occurs, the storage battery can supply power to the controller and the control valve to ensure the timely operation of the system.

[0025] The present application also provides a fire extinguishing method for a gas fire extinguishing system, adopting the following technical solution:

[0026] A fire extinguishing method for a gas fire extinguishing system includes maintaining a pressure on a pipeline through an overflow valve, and the pressure in the pipeline is less than the pressure in the fire extinguishing agent storage container. Then, the control valve on the pipeline is opened to cause the pressure in the pipeline to decrease, and then the container valve on the fire extinguishing agent storage container is activated by the pressure decrease, so that the gas in the fire extinguishing agent storage container enters the pipeline through the container valve.

[0027] By adopting the above technical solution, the pipeline maintains pressure through an overflow valve, and at the same time, the pressure in the pipeline is less than the pressure in the fire extinguishing agent storage container, reducing the requirement for the sealing performance of the pipeline. When the pressure in the pipeline decreases, the container valve on the fire extinguishing agent storage container is activated by the pressure decrease, thereby improving the accurate response of the system.

[0028] In summary, the present application includes at least one of the following beneficial technical effects:

[0029] 1. After the control valve is opened, the pressure in the connecting pipe decreases, causing the pressure in the balance area to decrease. Then, the pressure on the control room side pushes the valve core to move and opens the container valve, thereby releasing the fire extinguishing agent in the fire extinguishing agent storage container. When starting the piston, the pressure gas in the fire extinguishing agent storage container is used to push, so that the main piston can seal the fire extinguishing agent storage container better, and thus improve the storage time of the fire extinguishing agent in the fire extinguishing agent storage container;

[0030] 2. The first spring and the pressure in the balance area act together on the starting piston to balance the pressure acting on the piston in the pushing area, reducing the pressure requirement in the balance area. Furthermore, the sealing performance between the pipeline and the connecting pipe can be reduced, reducing costs;

[0031] 3. By selecting a manual solenoid valve as the control valve, the manual solenoid valve has a manual function at the same time, so as to facilitate opening the control valve in time through the manual function when a fire is discovered manually. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is the overall structural schematic diagram of an embodiment of the present application;

[0033] Figure 2 is the structural schematic diagram of the container valve in an embodiment of the present application;

[0034] Figure 3 is the internal structural schematic diagram of the container valve in an embodiment of the present application;

[0035] Figure 4 It is an exploded view of the valve core of the embodiment of the present application.

[0036] Explanation of reference numerals in the drawings: 1, fire extinguishing agent storage container; 2, container valve; 21, body; 211, air outlet; 212, communication port; 213, intermediate channel; 214, bend; 215, air inlet; 22, valve core; 221, starting piston; 222, main piston; 223, intermediate rod; 224, annular groove; 23, control chamber; 231, pushing area; 232, balancing area; 24, connection chamber; 251, first spring; 252, second spring; 261, upper cover plate; 262, lower cover plate; 27, sealing ring; 281, first air passage; 282, second air passage; 3, pipeline; 31, connecting pipe; 32, first branch pipe; 33, overflow valve; 34, second branch pipe; 35, manual valve; 4, fire extinguishing nozzle; 5, control valve; 6, controller; 7, smoke type fire detector; 8, light type fire detector; 9, storage battery; 10, manual pump; 11, tee; 12, pressure gauge; 13, sealing nut. Detailed implementation manners

[0037] The following further describes the present application in detail in conjunction with the Figures 1-4 drawings.

[0038] The embodiment of the present application discloses a gas fire extinguishing system. Refer to Figure 1, including a fire extinguishing agent storage container 1, in which a pressurized gas is provided. The gas is in a liquid state in the fire extinguishing agent storage container 1, and one of bromochlorodifluoromethane, bromotrifluoromethane, bromodifluoromethane, dibromotetrafluoroethane or heptafluoropropane can be selected. A container valve 2 is provided at the bottle mouth position of the fire extinguishing agent storage container 1. An air outlet 211 is provided on the container valve 2, and a pipeline 3 is connected to the air outlet 211. One end of the pipeline 3 far from the container valve 2 is connected to a fire extinguishing nozzle 4. At the same time, a control valve 5 is provided in the middle of the pipeline 3. The control valve 5 is a manual solenoid valve, which is a solenoid valve with a manual function and can be opened by both manual and electric means. The control valve 5 is connected to a controller 6, and a smoke-type fire detector 7 and a light-sensitive fire detector 8 are connected to the controller 6. The occurrence of a fire is judged by the smoke-type fire detector 7 and the light-sensitive fire detector 8 at the same time. A storage battery 9 is connected to the controller 6. The smoke-type fire detector 7, the light-sensitive fire detector 8 and the fire extinguishing nozzle 4 are installed in the equipment electrical room, and the equipment electrical room can be selected as the electricity meter room in an urban community. Since there are usually many wires in the electricity meter room in an urban community, it is prone to fire due to the influence of the load and is an electrified device. Therefore, the gas fire extinguishing method is better. Moreover, the door of the electricity meter room is usually in a closed state, belonging to an enclosed place. The controller 6 is usually connected to the municipal power supply so that the controller 6 can charge the storage battery 9 to keep enough electricity in the storage battery 9. When a fire occurs, even if the power supply is automatically cut off, the storage battery 9 can still provide power for the control valve 5 to open.

[0039] Reference Figure 2 and Figure 3, the container valve 2 includes a body 21 and a valve core 22. An inner chamber 23 and a connection chamber 24 are formed inside the body 21. The valve core 22 includes a starting piston 221 and a main piston 222. The starting piston 221 and the main piston 222 are fixedly connected, and the moving direction of the starting piston 221 is parallel to that of the main piston 222. In this embodiment, the centers of the starting piston 221 and the main piston 222 are on the same straight line and coincide with the center line of the body 21. The starting piston 221 is located inside the control chamber 23, and the control chamber 23 is divided into a pushing area 231 and a balancing area 232 by the starting piston 221. The pushing area 231 communicates with the inside of the fire extinguishing agent storage container 1, so that the pushing area 231 maintains a relatively high pressure, and the pressure exerted on the starting piston 221 by the pushing area 231 is used to open the valve core 22 to open the container valve 2. The pressure exerted on the starting piston 221 by the pressure in the balancing area 232 is opposite to the pressure exerted on the starting piston 221 by the pushing area 231, and a communication port 212 is provided at one end of the balancing area 232 away from the pushing area 231. A connecting pipe 31 is installed on the communication port 212. The connecting pipe 31 is made of copper pipe and is directly connected to the pipeline 3. The connection between the connecting pipe 31 and the pipeline 3 is located between the container valve 2 and the control valve 5. At the same time, a first branch pipe 32 is provided on the connecting pipe 31, and a relief valve 33 is connected to the first branch pipe 32. The relief valve 33 is used to stabilize the pressure in the connecting pipe 31. After the pressure of the relief valve 33 is adjusted to an appropriate position, the pressure in the connecting pipe 31 acts on the balancing area 232, so that the balancing area 232 and the pushing area 231 are in a balanced state. At this time, the valve core 22 is in a state of closing the container valve 2. At this time, even if a part of the fire extinguishing agent in the fire extinguishing agent storage container 1 leaks out due to long-term sealing, the fire extinguishing agent will be discharged through the relief valve 33 to maintain the position of the starting piston 221, thereby reducing the movement of the main piston 222. When the control valve 5 on the pipeline 3 is opened, the pressure in the pipeline 3 decreases. At this time, the balancing area 232 communicates with the pipeline 3 through the connecting pipe 31. Therefore, the pushing area 231 pushes the starting piston 221 under the action of the pressure in the fire extinguishing agent storage container 1. At the same time, the main piston 222 moves downward along with the starting piston 221, thereby opening the container valve 2, so that the fire extinguishing agent in the fire extinguishing agent storage container 1 can be sprayed through the pipeline 3 to the position of the fire extinguishing nozzle 4. Since the valve core 22 in the container valve 2 is pushed open by the pressure in the fire extinguishing agent storage container 1 when it is opened, a tighter seal can be adopted between the valve core 22 and the body 21 without the need to provide an additional pressure gas storage device.

[0040] Reference Figure 3, a middle channel 213 is provided at the center of the main body 21. A middle rod 223 is inserted into the middle channel 213. One end of the middle rod 223 is fixedly connected to a starting piston 221, and the other end is fixedly connected to a main piston 222. The middle rod 223 is in sealing cooperation with the middle channel 213, and the diameter of the middle rod 223 is smaller than the diameter of the starting piston 221. A first spring 251 is sleeved on the middle rod 223. One end of the first spring 251 abuts against the inner wall of the control chamber 23, and the other end abuts against the starting piston 221, so that the acting force of the first spring 251 and the air pressure in the balance area 232 act on the starting piston 221 together. A second spring 252 is arranged in the pushing area 231, and the elastic force of the second spring 252 is opposite to the elastic force direction of the first spring 251. The second spring 252 and the air pressure in the pushing area 231 act on the starting piston 221 together. During use, the air pressure in the balance area 232 can be in a lower state under the acting force of the first spring 251, so that the pressure in the connecting pipe 31 and the pipeline 3 is reduced, and the cost caused by the high air pressure requirements for the connecting pipe 31 and the pipeline 3 is reduced. After the air pressure in the fire extinguishing agent storage container 1 is reduced, the second spring 252 can be compressed to reduce the excessive natural release caused by the excessive movement distance of the valve core 22 due to the reduction of the pressure in the fire extinguishing agent storage container 1.

[0041] Reference Figure 2 and Figure 3 , an upper cover plate 261 is fixedly arranged at the upper end of the main body 21. The upper cover plate 261 abuts against the starting piston 221 with the second spring 252 through bolts. At the same time, the upper cover plate 261 is used to seal the control chamber 23, and a manual pump 10 is fixedly arranged outside the upper cover plate 261. A second branch pipe 34 is connected to the manual pump 10. The end of the second branch pipe 34 far from the manual pump 10 is communicated with the connecting pipe 31, and a manual valve 35 is arranged on the connecting pipe 31. The manual valve 35 is used to close the communication state between the overflow valve 33 and the pipeline 3. The overflow valve 33 adopts an overflow valve 33 with adjustable pressure. The connection position of the second branch pipe 34 and the connecting pipe 31 is located between the manual valve 35 and the balance area 232. When using the manual pump 10, it is necessary to first close the manual valve 35, and at the same time, increase the overflow pressure of the overflow valve 33, and then squeeze the manual pump 10. At this time, the manual pump 10 can pressurize the balance area 232 through the second branch pipe 34 and the connecting pipe 31, so that the starting piston 221 moves upward.

[0042] Reference Figure 3 and Figure 4, a lower cover plate 262 is fixedly arranged inside the main body 21. The lower cover plate 262 seals the connection chamber 24 by bolts, and the lower cover plate 262 is located directly below the main piston 222, so as to separate the end of the main piston 222 from the air pressure in the fire extinguishing agent storage container 1, reducing the direct action of the pressure in the fire extinguishing agent storage container 1 on the end of the main piston 222. At the same time, a bend 214 is arranged on one side of the lower cover plate 262 on the main body 21. One end of the bend 214 is connected below the lower cover plate 262 and used to connect the fire extinguishing agent storage container 1, and the other end communicates with the connection chamber 24 from the side wall position of the connection chamber 24. Furthermore, the side wall of the main piston 222 faces the end of the bend 214, so that the main piston 222 is subjected to less pressure inside the fire extinguishing agent storage container 1, that is, reducing the excessive axial force on the main piston 222 and making it difficult for the main piston 222 to move. The air outlet 211 opened on the main body 21 communicates with the upper end of the connection chamber 24, and the lower end of the main body 21 is threadedly connected to the opening of the fire extinguishing agent storage container 1. An air inlet 215 is opened on the main body 21, and the air inlet 215 communicates with the upper end of the connection chamber 24. When the main piston 222 moves upward under the action of the manual pump 10, the bend 214 is communicated with the air inlet 215. A ring groove 224 is opened on the side wall in the middle of the main piston 222, so that the bend 214 is communicated with the air inlet 215 through the ring groove 224, and is used to supplement air into the fire extinguishing agent storage container 1 through the air inlet 215. When the fire extinguishing agent in the fire extinguishing agent storage container 1 is used up, it is supplemented through the air inlet 215. A three-way pipe 11 is arranged on the air inlet 215. One end of the three-way pipe 11 is used to connect the pressure gauge 12, and the other end is used to connect the sealing nut 13. When the sealing nut 13 is unscrewed, air can be added into the air inlet 215 through the three-way pipe 11. When the sealing nut 13 is connected to the three-way pipe 11, the manual pump 10 moves the main piston 222 upward, and then the three-way pipe 11 is communicated with the fire extinguishing agent storage container 1 through the bend 214, and the pressure in the fire extinguishing agent storage container 1 can be displayed by the pressure gauge 12, which is convenient for the staff to detect the pressure state in the fire extinguishing agent storage container 1.

[0043] Reference Figure 3 and Figure 4, one end of the intermediate rod 223 is integrally provided with the starting piston 221, and the other end is communicated with the main piston 222 through a bolt, so that the intermediate rod 223 and the main piston 222 can be disassembled. During assembly, one end of the starting piston 221 with the intermediate rod 223 is inserted into the control chamber 23 from the upper end of the body 21, and the main piston 222 is inserted into the connection chamber 24 from the lower end of the body 21. Then the main piston 222 is installed on the intermediate rod 223, and then the upper end plate and the lower cover plate 262 are fixed to the body 21, so that the valve core 22 can be connected to the body 21. A sealing ring 27 is provided at the position where the middle of the intermediate rod 223 is sealed with the body 21, and sealing rings 27 are provided on both the main piston 222 and the starting piston 221. The valve core 22 and the body 21 are sealed by the sealing ring 27. At the same time, a first air passage 281 is provided at the center of the valve core 22, and a second air passage 282 is provided radially on the main piston 222 at the position where the annular groove 224 is provided on the main piston 222. The second air passage 282 is communicated with the first air passage 281. One end of the first air passage 281 located at the starting piston 221 is penetrated, and one end located at the main piston 222 is blocked, so that the gas in the fire extinguishing agent storage container 1 is communicated with the pushing area 231 through the second air passage 282 and the first air passage 281.

[0044] This embodiment also discloses a fire extinguishing method for a gas fire extinguishing system, including using the above-mentioned gas fire extinguishing system. The pipeline 3 maintains pressure through the overflow valve 33, and the pressure in the pipeline 3 is less than the pressure in the fire extinguishing agent storage container 1. Then the control valve 5 on the pipeline 3 is opened to cause the pressure in the pipeline 3 to decrease, and then the container valve 2 on the fire extinguishing agent storage container 1 is started through the pressure reduction, so that the gas in the fire extinguishing agent storage container 1 enters the pipeline 3 through the container valve 2 again.

[0045] The above are all the preferred embodiments of this application, and the protection scope of this application is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. A gas fire extinguishing system, comprising a fire extinguishing agent storage container (1), a control valve (5), a controller (6), and a smoke-type fire detector (7) and a light-sensitive fire detector (8) connected to the controller (6), characterized in that: The fire extinguishing agent storage container (1) is connected to a fire extinguishing nozzle (4) through a pipeline (3). A control valve (5) is connected to the pipeline (3), and at the same time, a controller (6) is connected to the control valve (5). A container valve (2) is installed on the fire extinguishing agent storage container (1). The container valve (2) includes a body (21) and a valve core (22). An air outlet (211) is formed on the body (21), and the air outlet (211) is communicated with the pipeline (3). A control chamber (23) and a connection chamber (24) are arranged inside the body (21). The valve core (22) includes a starting piston (221) and a main piston (222) fixedly connected. The main piston (222) is located in the connection chamber (24) to control the on-off of the container valve (2). The starting piston (221) is located in the control chamber (23). The starting piston (221) divides the control chamber (23) into a pushing area (231) and a balancing area (232). When the container valve (2) is in the off state, the pushing area (231) is communicated with the inside of the fire extinguishing agent storage container (1). A connecting pipe (31) is arranged between the balancing area (232) and the pipeline (3). An overflow valve (33) for stabilizing the pressure in the connecting pipe (31) is connected to the connecting pipe (31) through a first branch pipe (32). An intermediate rod (223) is fixedly arranged on the starting piston (221). The diameter of the intermediate rod (223) is smaller than that of the starting piston (221). One end of the intermediate rod (223) away from the starting piston (221) is used to connect the main piston (222). A first spring (251) is sleeved on the intermediate rod (223). One end of the first spring (251) abuts against the starting piston (221), and the other end abuts against the inner wall of the control chamber (23) and acts on the same side of the starting piston (221) together with the pressure in the balancing area (232). An upper cover plate (261) is arranged at one end of the body (21), and a lower cover plate (262) is arranged at the other end. The upper cover plate (261) is used to block the control chamber (23), and the lower cover plate (262) is used to block the connection chamber (24). A bend (214) is formed inside the body (21). One end of the bend (214) is connected to the side of the lower cover plate (262) away from the control chamber (23), and the other end is connected to the side wall of the control chamber (23). Thus, when the side wall of the main piston (222) is facing the end of the bend (214), the pressure inside the fire extinguishing agent storage container (1) acting on the main piston (222) is smaller. The air outlet (211) is located at the side position of the connection chamber (24) away from the lower cover plate (262) and is communicated with the connection chamber (24). The intermediate rod (223) and the main piston (222) are fixedly connected by threads.

2. The gas fire extinguishing system according to claim 1, wherein: A second spring (252) is arranged in the pushing area (231). The elastic force of the second spring (252) is opposite to that of the first spring (251). The second spring (252) and the pressure in the pushing area (231) act together on the same side of the starting piston (221).

3. A gas fire extinguishing system according to claim 1, characterized in that: A first air passage (281) is arranged at the center of the valve core (22). A second air passage (282) is arranged radially on the main piston (222). The first air passage (281) communicates with the pushing area (231). An annular groove (224) is formed in the middle side wall of the main piston (222). The second air passage (282) communicates with the annular groove (224), and the second air passage (282) communicates with the first air passage (281).

4. A gas fire extinguishing system according to claim 3, characterized in that: An air inlet (215) is arranged on the body (21). A three-way pipe (11) is installed on the air inlet (215). One end of the three-way pipe (11) is connected with a pressure gauge (12), and the other end is connected with a sealing nut (13).

5. A gas fire extinguishing system according to claim 4, characterized in that: The air inlet (215) is located on one side of the connection chamber (24) where the air outlet (211) is arranged. When the main piston (222) moves towards the end of the air outlet (211), the main piston (222) communicates the air inlet (215) with the bend (214) through the annular groove (224). A manual pump (10) is fixedly arranged on the body (21). The manual pump (10) communicates with a connecting pipe (31) through a second branch pipe (34). A manual valve (35) is arranged at a position on the connecting pipe (31) between the overflow valve (33) and the pipe (3).

6. A gas fire extinguishing system according to claim 1, characterized in that: The control valve (5) is a manual solenoid valve.

7. A gas fire extinguishing system according to claim 1, characterized in that: The controller (6) is connected with a storage battery (9).

8. A fire extinguishing method for a gas fire extinguishing system, which uses a gas fire extinguishing system according to any one of claims 1-7 for fire extinguishing, characterized in that: It includes that there is pressure maintained on the pipe (3) through the overflow valve (33), and the pressure in the pipe (3) is less than the pressure in the fire extinguishing agent storage container (1). Then the control valve (5) on the pipe (3) is opened to cause the pressure in the pipe (3) to decrease. Then, through the pressure decrease, the container valve (2) on the fire extinguishing agent storage container (1) is started, so that the gas in the fire extinguishing agent storage container (1) enters the pipe (3) through the container valve (2).

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