High and large space gas fire extinguishing system capable of achieving multi-time directional spraying

Abstract

The utility model discloses a high and large space gas fire extinguishing system capable of spraying directionally for multiple times, which comprises a plurality of gas spraying pipes distributed at intervals along the height direction of a fire extinguishing protection area so as to form a plurality of layers of gas spraying areas; a master control valve is arranged at the air outlet end of the fire extinguishing device, the fire extinguishing device is correspondingly connected with the air spraying pipes in the multiple layers of air spraying areas through multiple air feeding pipes, two secondary selection valves are arranged on each air spraying pipe so as to divide each layer of air spraying area into two local air spraying areas, and a fire extinguishing agent concentration monitoring device is arranged in each local air spraying area; the plurality of fire monitoring devices are uniformly arranged in the fire extinguishing protection area; and the control device is in signal connection with the main control valve, the secondary selection valve, the fire extinguishing agent concentration monitoring device and the fire hazard monitoring device. According to the utility model, a total flooding type fire extinguishing mode is adopted for the first spraying, and then secondary, third and even multiple local fire extinguishing spraying is carried out, so that the uniform fire extinguishing design concentration in each direction can be quickly formed in a high and large fire extinguishing protection area at the initial stage of a fire.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of fire fighting equipment more particularly, relate to a tall space gas fire extinguishing system of multiple directional spray. BACKGROUND

[0002] Full submersion type gas fire extinguishing mainly is through the rapid release of a large number of inert gas covers entire enclosed space (i.e. fire protection zone), reduce oxygen concentration to the level that fire cannot maintain, to realize rapid fire extinguishing, especially suitable for dangerous chemical warehouse and converter station valve hall and other industrial plant and warehouse.

[0003] Industrial plant and warehouse are mostly tall space place, tall space place as fire protection zone, with the space of large area and volume. However, the existing full submersion type gas fire extinguishing design application in tall space place exists following problem:

[0004] 1, only in the top of fire protection zone arrangement a layer pipe network and spray head, gas fire extinguishing agent can not fill the entire space in short time, can not quickly suppress fire, and the fire extinguishing effect is poor.

[0005] 2, gas fire extinguishing agent (for example carbon dioxide extinguishing agent) density is heavier than air density, once release, will gradually deposit in the bottom of fire protection zone, when the height of fire protection zone is too high, will cause the fire extinguishing agent concentration of high position area to be lower than fire extinguishing design concentration, can not guarantee full submersion type fire extinguishing effect, and the fire extinguishing effect is poor.

[0006] Summarized above, how to solve tall space place fire extinguishing effect is poor, is the problem that present field technical personnel urgently solves. INVENTION CONTENTS

[0007] Therefore, the utility model discloses the purpose is to provide a tall space gas fire extinguishing system of multiple directional spray, first spray adopts full submersion type fire extinguishing mode, can release enough gas fire extinguishing agent quickly, then carries out second, third and even multiple local fire extinguishing spray, makes gas fire extinguishing agent evenly distribute in fire protection zone, to form the fire extinguishing design concentration of each direction uniformity in the fire protection zone of tall space in fire initial stage.

[0008] In order to realize the above-mentioned purpose, the utility model provides the following technical scheme:

[0009] A tall space gas fire extinguishing system of multiple directional spray is applied to fire protection zone, and it comprises:

[0010] A plurality of air injection pipes are distributed along the height direction of the fire protection zone to form a plurality of air injection zones, and the air injection pipes in each air injection zone are distributed around the periphery of the fire protection zone and are provided with a plurality of spray heads at intervals.

[0011] The fire extinguishing device is provided outside the fire extinguishing protection area, a gas outlet end of the fire extinguishing device is provided with a total control valve and is connected with multiple gas supply pipes corresponding to multiple layers of the gas injection area, two secondary selection valves are arranged on the gas injection pipe and are located on both sides of the connection between the gas supply pipe and the gas injection pipe to divide each layer of the gas injection area into two local gas injection areas, and each local gas injection area is provided with a fire extinguishing agent concentration monitoring device.

[0012] Multiple fire monitoring devices are uniformly arranged in the fire extinguishing protection area to monitor whether a fire occurs in the fire extinguishing protection area in real time.

[0013] A control device is signal connected with the total control valve, the multiple secondary selection valves, the multiple fire extinguishing agent concentration monitoring devices and the multiple fire monitoring devices.

[0014] Preferably, the multiple layers of the gas injection area include at least three layers, and the highest layer of the gas injection area is located at the top end of the fire extinguishing protection area.

[0015] Preferably, the gas injection pipe in the highest layer of the gas injection area includes multiple short pipes, the multiple short pipes are connected in a staggered manner to form a mesh structure, multiple nozzles are arranged on each short pipe at intervals, and one short pipe is connected with the gas supply pipe.

[0016] Preferably, the gas injection pipes in the remaining layers of the gas injection area are in a ring structure and are laid around the four perimeters of the fire extinguishing protection area.

[0017] Preferably, each local gas injection area is further provided with an oxygen concentration monitoring device, and the oxygen concentration monitoring device is signal connected with the control device.

[0018] Preferably, the gas supply pipe is provided with a primary selection valve between the total control valve and the secondary selection valve.

[0019] Preferably, the control device includes a control panel and automatic buttons, manual buttons and emergency stop buttons arranged thereon.

[0020] The high and large space gas fire extinguishing system with multiple directional spraying provided by the utility model has the following beneficial effects:

[0021] 1. Multiple layers of gas injection areas are arranged in the height direction of the fire extinguishing protection area, so that the gas fire extinguishing agent can be rapidly filled in the fire extinguishing protection area in a short time, thereby improving the rapid distribution performance of the fire extinguishing agent.

[0022] 2. Each layer of the air injection area is divided into two local air injection areas, and each local air injection area is provided with a fire extinguishing agent concentration monitoring device, so that the air injection can be performed twice, thrice or more times according to the fire extinguishing agent concentration of the local air injection area, so that the fire extinguishing agent concentration in all spaces of the fire extinguishing protection area reaches at least the fire extinguishing design concentration.

[0023] In summary, in combination with the above two effects, the present application can rapidly form a fire extinguishing design concentration with uniformity in all directions in the fire extinguishing protection area of a high and large space in the early stage of fire, thereby greatly improving the fire extinguishing effect. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are only a part of the embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of the provided drawings.

[0025] Figure 1 Fig. 1 is a schematic diagram of a multiple directional injection high and large space gas fire extinguishing system provided by the present application;

[0026] Figure 2 Fig. 2 is a local enlarged view of A in Fig. 1. Figure 1

[0027] Reference signs:

[0028] 1-air injection pipe; 2-nozzle; 3-air injection area; 31-local air injection area; 4-air supply pipe; 5-secondary selection valve; 6-fire extinguishing protection area; 7-fire extinguishing device; 8-fire monitoring device; 9-fire extinguishing agent concentration monitoring device; 10-oxygen concentration monitoring device; 11-primary selection valve; 12-master control valve. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0030] ​The core of the utility model discloses a tall space gas fire extinguishing system of multiple directional spray, first spray adopts full submergence type fire extinguishing mode, can release enough gas fire extinguishing agent quickly, then carries out secondary, third or even multiple local fire extinguishing spray, makes the gas fire extinguishing agent evenly distribute in the fire protection area, thereby can form the fire extinguishing design concentration of each direction uniformity in the fire protection area of tall space in the initial stage of fire.

[0031] Need to explain, "first", "second" only for describing effect, and can not be understood as indicating or suggesting relative importance.

[0032] Please refer to Figure 1 The utility model provides a tall space gas fire extinguishing system of multiple directional spray, be applied to fire protection area 6, including jet area 3, fire extinguishing device 7, fire monitoring device 8 and control device.

[0033] Multiple jet pipes 1 are spaced apart along the height direction of the fire protection area 6 to form multiple layers of jet areas 3, and the jet pipes 1 in each layer of jet areas 3 are distributed around the periphery of the fire protection area 6 and are spaced apart to have multiple nozzles 2.

[0034] Need to explain, fire protection area 6 refers to the closed place needing to adopt gas fire extinguishing, and the fire protection area 6 of the utility model mainly aims at tall space place, especially converter station valve hall and dangerous chemical warehouse.

[0035] Multiple jet pipes 1 are spaced apart along the height direction of the fire protection area 6 to form multiple layers of jet areas 3, and the jet pipes 1 in each layer of jet areas 3 are distributed around the periphery of the fire protection area 6 to avoid interference with the equipment or goods in the fire protection area 6 as much as possible, and multiple nozzles 2 are arranged on the jet pipes 1, preferably, the multiple nozzles 2 are spaced apart along the length direction of the jet pipes 1, so that each layer of jet areas 3 has the function of jet fire extinguishing.

[0036] The multiple layers of jet areas 3 designed above can release enough gas fire extinguishing agent into the fire protection area 6 in the shortest time and quickly fill the fire protection area 6 to improve the rapid distribution performance of the fire extinguishing agent, thereby facilitating the adoption of full submergence type fire extinguishing mode in tall space place.

[0037] The fire extinguishing device 7 is arranged outside the fire protection area 6, the gas outlet end of the fire extinguishing device 7 is provided with a master control valve 12 and is connected to the jet pipes 1 in the multiple layers of jet areas 3 through multiple gas supply pipes 4, and two secondary selection valves 5 are arranged on the jet pipes 1, which are located on both sides of the connection between the gas supply pipes 4 and the jet pipes 1 to divide each layer of jet areas 3 into two local jet areas 31, and each local jet area 31 is provided with a fire extinguishing agent concentration monitoring device 9.

[0038] It should be noted that, since there are many dangerous chemicals that will react with water to cause explosion or fire during extinguishing, the gas extinguishing agent generally uses inert gas with more stable chemical properties for extinguishing, such as the most commonly used carbon dioxide extinguishing agent. In addition, the extinguishing device 7 uses a constant pressure storage high pressure gas extinguishing agent to enable rapid release of the gas extinguishing agent, and to ensure safe and stable transportation or storage of the gas extinguishing agent, therefore, the application can use a constant pressure storage high pressure carbon dioxide extinguishing device 7, the specific structure of which can refer to the prior art, which is not the improvement focus of the application, and will not be described in detail herein.

[0039] It should be particularly pointed out that the extinguishing device 7 has a large pressure when releasing the gas extinguishing agent, and if the extinguishing device 7 leaks or accidentally releases, it will endanger the operating personnel and equipment in the fire protection area 6, therefore, the extinguishing device 7 is arranged outside the fire protection area 6, which can maximize the safety of the operating personnel and equipment.

[0040] The gas outlet end of the extinguishing device 7 is provided with a master control valve 12 for controlling the start and stop of the release of the gas extinguishing agent by the extinguishing device 7, and the gas outlet end of the extinguishing device 7 is connected to one end of a plurality of gas supply pipes 4, the other end of the plurality of gas supply pipes 4 extends to each layer of the gas injection area 3 one by one and is connected to the gas injection pipe 1 therein, two secondary selection valves 5 are arranged on the gas injection pipe 1, and the two secondary selection valves 5 are respectively located on both sides of the connection between the gas supply pipe 4 and the gas injection pipe 1, the secondary selection valves 5 have the function of controlling the opening and closing of the pipeline, thereby dividing each layer of the gas injection area 3 into two local gas injection areas 31 which can be independently injected.

[0041] Further, each local gas injection area 31 is provided with a fire extinguishing agent concentration monitoring device 9 for monitoring the concentration of the fire extinguishing agent in the local gas injection area 31 in real time. Thus, the local gas injection area 31 can be injected twice, three times or even multiple times according to the concentration of the fire extinguishing agent, so that the concentration of the gas extinguishing agent in all spaces of the fire protection area 6 at least reaches the design concentration for extinguishing.

[0042] Preferably, as shown in Figure 1 The connection between the gas supply pipe 4 and the gas injection pipe 1 is arranged opposite the center position of the fire protection area 6, and the center position of the fire protection area 6 can be taken as the center to divide the two local gas injection areas 31, so as to better monitor the local concentration of the fire extinguishing agent and locally extinguish the fire protection area 6.

[0043] A plurality of fire monitoring devices 8 are evenly arranged in the fire protection area 6 for monitoring whether a fire occurs in the fire protection area 6 in real time.

[0044] It should be noted that the type of fire monitoring device 8 can be selected according to the design requirements of the fire extinguishing place. For example, in places where a large amount of smoke is generated in the early stage of fire, the fire monitoring device 8 is preferably an image type smoke sensing fire monitoring device 8, which can detect early fire smoke to quickly respond to fire alarm signals. Of course, the fire monitoring device 8 can also use infrared smoke fire monitoring device 8 or aspirating smoke fire monitoring device, and the type is not unique.

[0045] In the height direction of the fire extinguishing protection area 6, multiple layers of detection areas are arranged at intervals, and each layer of detection area has multiple fire monitoring devices 8 arranged uniformly around the fire extinguishing protection area 6, so as to realize uniform arrangement of multiple fire monitoring devices 8 in the fire extinguishing protection area 6, and avoid the situation that the fire is not timely due to the detection dead zone in the fire extinguishing protection area 6.

[0046] The control device is signal connected with the master control valve 12, the multiple secondary selection valves 5, the multiple fire extinguishing agent concentration monitoring devices 9 and the multiple fire monitoring devices 8.

[0047] The fire monitoring device 8 is connected with the control device through a signal line to transmit the fire monitoring signal to the control device in real time. The control device compares the fire monitoring signal fed back by the fire monitoring device 8 with the preset fire extinguishing threshold value according to the preset control algorithm, and controls the opening and closing of the master control valve 12 and the secondary selection valve according to the comparison result, so as to realize closed-loop full-area fire extinguishing control.

[0048] The fire extinguishing agent concentration monitoring device 9 is signal connected with the control device through an electric wire to transmit the fire extinguishing agent concentration monitoring signal in the local jet area 31 to the control device in real time. The control device compares the obtained fire extinguishing agent concentration monitoring signal with the preset fire extinguishing agent concentration threshold value, and controls the opening and closing of the secondary selection valve 5 and the master control valve 12 corresponding to the local jet area 31 according to the comparison result, so as to realize closed-loop local-area fire extinguishing control.

[0049] As to the specific number of layers of the multiple jet areas 3, on the basis of the above embodiment, please refer to Figure 1 The multiple jet areas 3 include at least three layers.

[0050] It can be understood that the more the number of layers of the multiple jet areas 3, the more conducive to the uniform diffusion of the gas fire extinguishing agent to fill the fire extinguishing protection area 6. Therefore, in a high and large space place (i.e. at least three jet areas 3 are arranged in the fire extinguishing protection area 6.

[0051] It should be noted that in the case that the high and large space place and the design concentration of the fire extinguishing agent are the same, arranging five jet areas 3 compared with three jet areas 3 can make the gas fire extinguishing agent more uniformly diffuse, but the difference is not big. In order to save the engineering cost, the application preferably adopts three multiple jet areas 3.

[0052] Further, to ensure that the top area of the fire extinguishing protection zone 6 meets the requirements of the concentration of extinguishing agent, please refer to Figure 1 The highest layer of the gas injection area 3 is located at the top of the fire extinguishing protection zone 6.

[0053] Regarding the specific structure of the gas injection pipe 1 in the highest layer of the gas injection area 3, please refer to Figure 1 The gas injection pipe 1 in the highest layer of the gas injection area 3 includes multiple short pipes, which are connected in a staggered manner to form a mesh structure. Multiple nozzles 2 are arranged on each short pipe at intervals, and one short pipe is connected to the gas supply pipe 4.

[0054] That is, multiple short pipes are connected in a staggered manner to form a mesh structure and are arranged at the top of the fire extinguishing protection zone 6, so that multiple nozzles 2 are uniformly and densely arranged at the top of the fire extinguishing protection zone 6. After a fire extinguishing spray, if the gas extinguishing agent at the top area deposits downward and causes the concentration to be lower than the design concentration of the extinguishing agent, opening any one or two secondary selection valves 5 in the highest layer of the gas injection area 3 can quickly form a uniform design concentration of extinguishing agent at the top of the fire extinguishing protection zone 6.

[0055] Regarding the specific structure of the gas injection pipe 1 in the remaining layers of the gas injection area 3, please refer to Figure 1 The gas injection pipe 1 in the remaining layers of the gas injection area 3 is in a ring structure and is laid around the perimeter of the fire extinguishing protection zone 6.

[0056] Since high and large space places often have large equipment or goods, the gas injection pipe 1 in the remaining layers of the gas injection area 3 is in a ring shape and is laid around the perimeter of the fire extinguishing protection zone 6, which is simple in structure and can save space. It does not need to modify the already built place, thereby reducing the difficulty of pipe and nozzle 2 arrangement construction.

[0057] It should be noted that after two consecutive fire extinguishing operations, if the fire monitoring signal monitored by any fire monitoring device 8 is lower than the preset fire extinguishing threshold, it represents that the fire extinguishing is successful, and the fire extinguishing protection zone 6 maintains the fire extinguishing suppression time, which refers to the time required to maintain the design concentration of the extinguishing agent in the fire extinguishing protection zone 6 to completely extinguish the solid deep-seated fire. During the fire extinguishing suppression time, if the oxygen concentration in the fire extinguishing protection zone 6 is too high or the concentration of the gas extinguishing agent is too low, it will cause the fire to rekindle.

[0058] To avoid the phenomenon of fire rekindling in the fire extinguishing protection zone 6, there are two implementation ways as follows:

[0059] In one embodiment, the fire extinguishing agent concentration monitoring device 9 monitors the fire extinguishing agent concentration of the local gas injection area 31 in real time within the preset fire extinguishing suppression time period, and if the fire extinguishing agent concentration is lower than the preset fire extinguishing agent concentration threshold, the secondary selection valve 5 in the local gas injection area 31 adjacent to the low fire extinguishing agent concentration area is opened, and then the master control valve 12 is opened, so that the gas fire extinguishing agent is supplied to the low fire extinguishing agent concentration area to prevent the low fire extinguishing agent concentration area from reigniting.

[0060] In another embodiment, each of the local gas injection areas 31 is also provided with an oxygen concentration monitoring device 10, and the oxygen concentration monitoring device 10 is signal connected to the control device.

[0061] Thus, the oxygen concentration monitoring device 10 monitors the oxygen concentration of the local gas injection area 31 in real time within the preset fire extinguishing suppression time period, and if the oxygen concentration is higher than the preset oxygen concentration threshold, the secondary selection valve 5 in the local gas injection area 31 adjacent to the high oxygen concentration area is opened, so that the gas fire extinguishing agent is supplied to the high oxygen concentration area to prevent the high oxygen concentration area from reigniting by reducing the oxygen concentration.

[0062] Preferably, please refer to Figure 1 and Figure 2 The gas supply pipe 4 is provided with a primary selection valve 11 between the master control valve 12 and the secondary selection valve 5.

[0063] The primary selection valve 11 and the secondary selection valve 5 both have the function of controlling the opening and closing of the pipeline. The primary selection valve 11 is arranged on the gas supply pipe 4 between the master control valve 12 and the secondary selection valve 5. If the fire extinguishing injection operation of a local gas injection area is to be implemented, the primary selection valve 11 and the secondary selection valve 5 corresponding to the local gas injection area are opened on the basis of the master control valve 12 being opened. Therefore, the two-stage valve arrangement can prevent misoperation and also prevent gas backflow.

[0064] Regarding the specific arrangement of the control device, on the basis of any of the above embodiments, the control device includes a control panel and an automatic button, a manual button and an emergency stop button arranged thereon.

[0065] The automatic button is a start-stop button for the system to implement automatic fire extinguishing operation. If the automatic button is pressed, the system automatically performs fire extinguishing operation according to the preset conditions without human intervention.

[0066] The automatic fire extinguishing operation may have a situation of false alarm of the fire monitoring device 8. If the fire monitoring device 8 has a fire warning or the fire extinguishing device 7 has been opened for gas injection fire extinguishing, it is found that the alarm is false. The fire extinguishing program can be interrupted through the emergency stop button. It should be noted that the emergency stop button can also be arranged at the entrance of the fire protection area to facilitate the timely operation of the on-site staff.

[0067] The manual button is a start-stop button for realizing manual fire extinguishing operation of the system. Specifically, when a fire occurs in the fire protection area 6, the controller in the control panel acquires the abnormal fire monitoring signal, and after confirmation by the on-site personnel, if the manual button is pressed, the fire extinguishing device 7 can be started by the controller to implement fire extinguishing. The above-mentioned manual control fire extinguishing operation can be confirmed by the on-site personnel, so the gas jet fire extinguishing can be started only when the fire is confirmed and the personnel complete evacuation.

[0068] The specific control method applied to the high and large space gas fire extinguishing system with multiple directional discharges disclosed in the above embodiments includes:

[0069] S1: acquiring fire monitoring signals of multiple fire monitoring devices;

[0070] S2: when at least two fire monitoring signals reach a preset fire extinguishing threshold value at the same time, opening all primary selection valves and secondary selection valves, then opening the master control valve, reaching a preset first full flooding discharge time, closing the master control valve, and then closing all primary selection valves and secondary selection valves;

[0071] It should be noted that if at least two fire monitoring devices send abnormal fire monitoring signals (i.e. greater than or equal to the preset fire extinguishing threshold value) to the control device, it indicates that a fire has occurred in the fire protection area, which can prevent false reporting of the fire monitoring device.

[0072] The preset fire extinguishing threshold value can be adaptively selected by the user according to the actual situation, for example, if the fire monitoring device is a temperature-sensitive smoke monitoring device, the preset fire extinguishing threshold value can be set according to the dangerous temperature of the dangerous chemical or electrical equipment that ignites the fire protection area. When the monitoring temperature reaches the dangerous temperature, the control device determines to start the fire extinguishing program. In addition, the preset first full flooding discharge time can be obtained by quantitative fire simulation of dangerous chemical plane warehouse and stereoscopic warehouse, etc. The time from the fire entering the rapid development stage to the full combustion stage is set as the full-area fire extinguishing setting time, so as to extinguish the fire comprehensively before the fire develops to the full combustion stage.

[0073] Therefore, after executing the above-mentioned step S2, a sufficient amount of gas fire extinguishing agent can be discharged into the fire protection area, and the gas fire extinguishing agent can quickly fill the fire protection area, so that the fire protection area can reach the required fire extinguishing design concentration in the whole space at the initial stage of the fire.

[0074] It should be noted that since the gas fire extinguishing agent such as carbon dioxide extinguishing agent has a higher density than air, the gas fire extinguishing agent will gradually move downward and deposit at the bottom of the fire protection area. Therefore, after completing the first fire extinguishing discharge operation, the second local fire extinguishing discharge operation needs to be performed immediately.

[0075] S3: Then, the fire extinguishing agent concentration monitoring signals of the plurality of fire extinguishing agent concentration monitoring devices are acquired;

[0076] S4: When any of the fire extinguishing agent concentration monitoring signals is lower than the preset fire extinguishing agent concentration threshold value, the primary selection valve and the secondary selection valve corresponding to the local gas injection area adjacent to the area with low fire extinguishing agent concentration are opened, and then the master control valve is opened. After a preset second local injection time, the master control valve is closed, and then the opened primary selection valve and the secondary selection valve are closed.

[0077] It should be noted that if any of the fire extinguishing agent concentration monitoring devices sends an abnormal fire extinguishing agent concentration signal (lower than the preset fire extinguishing agent concentration threshold value) to the control device, it indicates that the fire extinguishing agent concentration near the local gas injection area corresponding to the fire extinguishing agent concentration monitoring device is too low. Then, the primary selection valve and the secondary selection valve corresponding to the local gas injection area adjacent to the area with low fire extinguishing agent concentration are opened, and then the master control valve is opened. After a preset second local injection time, the master control valve is closed, and then the opened primary selection valve and the secondary selection valve are closed. The above-mentioned second local injection time should be shorter than the full-area fire extinguishing setting time, for example, the full-area fire extinguishing setting time is 60s, and the local-area fire extinguishing setting time is 30s.

[0078] Therefore, even if the gas fire extinguishing agent in the top area of the fire protection zone sinks to the bottom, after performing the above-mentioned step S4, the gas fire extinguishing agent concentration in all spaces of the fire protection zone can reach at least the fire extinguishing design concentration at the initial stage of the fire, that is, a uniform fire extinguishing design concentration can be quickly formed in the fire protection zone of the high and large space at the initial stage of the fire, thereby greatly improving the fire extinguishing effect.

[0079] Optionally, after performing step S2, the following steps can also be performed to perform a second local fire extinguishing injection operation, specifically including:

[0080] S3': Then, the primary selection valve and all secondary selection valves corresponding to the highest layer gas injection area are opened, and then the master control valve is opened. After a preset second local injection time, the master control valve is closed, and then the opened primary selection valve and the secondary selection valve are closed.

[0081] Therefore, after performing the above-mentioned step S3', the deposition amount of the gas fire extinguishing agent in the high position area can be made up, so that the fire extinguishing agent concentration in the high position area reaches the fire extinguishing design concentration, thereby improving the fire extinguishing effect.

[0082] After completing the second local fire extinguishing injection operation, it is necessary to determine whether the fire extinguishing is successful, therefore, after step S4, the following steps are also included:

[0083] S5: The fire monitoring signals of the plurality of fire monitoring devices are acquired;

[0084] S6: When any fire monitoring signal reaches the preset fire extinguishing threshold, open the primary selection valve and the secondary selection valve corresponding to the local gas injection area adjacent to the unextinguished area, then open the master control valve, after reaching the preset local injection time, close the master control valve, then close the opened primary selection valve and secondary selection valve;

[0085] It should be noted that if the second local fire extinguishing injection operation is completed, the fire monitoring device still sends an abnormal fire monitoring signal to the control device, indicating that the fire extinguishing in the area near the fire monitoring device has failed, and the local area still needs to be extinguished. Specifically, open the primary selection valve and the secondary selection valve corresponding to the local gas injection area adjacent to the unextinguished area, then open the master control valve to inject gas extinguishing agent into the unextinguished area, after reaching the preset local injection time, close the master control valve, then close the opened primary selection valve and secondary selection valve, end the third local fire extinguishing injection operation, then jump to the above step S5 to continue to judge whether the fire extinguishing is successful, otherwise continue to execute step S6 to perform the fourth or even multiple local fire extinguishing injection operations until the fire extinguishing is successful and enters the following step S7.

[0086] S7: When all fire monitoring signals are lower than the preset fire extinguishing threshold, execute the following steps within the preset fire extinguishing suppression time period:

[0087] S71: Obtain fire extinguishing agent concentration monitoring signals of multiple fire extinguishing agent concentration monitoring devices, when any fire extinguishing agent concentration monitoring signal is lower than the preset fire extinguishing agent concentration threshold, open the primary selection valve and the secondary selection valve corresponding to the local gas injection area adjacent to the area with low fire extinguishing agent concentration, then open the master control valve;

[0088] It should be noted that if all fire monitoring signals do not send an abnormal fire extinguishing agent concentration monitoring signal to the control device, it indicates that the system extinguishing is successful. To prevent the system from reigniting within the preset fire extinguishing suppression time period, execute the above step S71, specifically, if any fire extinguishing agent concentration monitoring device sends an abnormal fire extinguishing agent concentration signal (lower than the preset fire extinguishing agent concentration threshold) to the control device, it indicates that the fire extinguishing agent concentration in the area near the fire extinguishing agent concentration monitoring device is too low, open the primary selection valve and the secondary selection valve corresponding to the local gas injection area adjacent to the area with too low fire extinguishing agent concentration, then open the master control valve, which can supplement the gas extinguishing agent to the area with low fire extinguishing agent concentration to prevent the area from reigniting.

[0089] S72: Obtain oxygen concentration monitoring signals of multiple oxygen concentration monitoring devices, when any oxygen concentration monitoring signal is higher than the preset oxygen concentration threshold, open the primary selection valve and the secondary selection valve corresponding to the local gas injection area adjacent to the area with high oxygen concentration, then open the master control valve.

[0090] It should be noted that, in order to prevent the system from rekindling in the preset fire extinguishing suppression time period, the above step S72 can also be executed in parallel, specifically, if any oxygen concentration monitoring device sends an abnormal oxygen concentration signal (higher than the preset oxygen concentration threshold) to the control device, it indicates that the oxygen concentration in the area near the fire extinguishing agent concentration monitoring device is too high, the primary selection valve and the secondary selection valve corresponding to the local gas injection area adjacent to the high oxygen concentration area are opened, and then the master control valve is opened, so as to supplement the gas fire extinguishing agent to the high oxygen concentration area to prevent the high oxygen concentration area from rekindling by reducing the oxygen concentration.

[0091] Either of the above steps S71 and S72 can prevent the phenomenon of fire rekindling in the fire extinguishing protection area, and the two steps can be performed simultaneously, one by one, or one of them.

[0092] After the above step S1 is executed, the following steps are further included:

[0093] S11: When only one fire monitoring signal reaches the preset fire extinguishing threshold, a warning command is sent to the fire monitoring device that sends an abnormal fire monitoring signal, and the fire monitoring device sends a fire warning sound.

[0094] It should be noted that, if only one fire monitoring device sends an abnormal fire monitoring signal to the control device, the control device controls the fire monitoring device to send a fire warning sound. On the one hand, if the site personnel confirm that a fire has occurred, they can ensure the safe evacuation of personnel in the fire extinguishing protection area before the fire spreads. On the other hand, if the site personnel confirm that there is no fire, they can stop evacuating in time, and manually open the emergency stop button to interrupt the fire monitoring device fire warning sound.

[0095] Further, after the above step S11 is executed, the following steps are further included:

[0096] S12: When the emergency stop signal of the emergency stop button is obtained, a stop warning command is sent to the fire monitoring device 8 that sends the fire warning sound, and the fire monitoring device stops sending the fire warning sound.

[0097] In this way, the site worker presses the emergency stop button at the entrance of the fire extinguishing protection area, which can stop the fire warning sound in time, avoiding the panic of the workers and the loss of materials caused by false reports.

[0098] After the above step S2, when at least two fire monitoring signals simultaneously reach the preset fire extinguishing threshold, before all the secondary selection valves are opened, the following steps are further included:

[0099] S21: sending a fire alarm command to the fire monitoring device sending the abnormal fire monitoring signal, the fire monitoring device 8 sends a fire alarm sound, after reaching a preset delay time, all secondary selection valves and master control valves are opened.

[0100] It should be noted that if at least two fire monitoring devices send abnormal fire monitoring signals to the control device, it indicates that a fire has indeed occurred in the fire protection area. Before performing the fire extinguishing operation, the fire alarm sound of any one or both of the two fire monitoring devices is controlled, and after reaching a preset delay time, the preset delay time can be set according to the specific conditions of the high and large space place, and is generally not more than 30s. Then all secondary selection valves and master control valves are opened, and the remaining operations in step S2 are performed to realize the first fire extinguishing spraying operation.

[0101] Each embodiment in the specification is described in a progressive manner, and each embodiment focuses on the difference from other embodiments. The same or similar parts between each embodiment can be referred to each other.

[0102] The above describes in detail the high and large space gas fire extinguishing system provided by the present application. The principle and implementation mode of the present application are described by applying specific examples. The above embodiment is only used to help understand the method and core idea of the present application. It should be pointed out that for ordinary skilled in the art, without departing from the principle of the present application, the present application can be improved and modified in several ways. These improvements and modifications also fall within the protection scope of the present application.

Claims

1. A high space gas fire extinguishing system with multiple directional discharges, applied in a fire protection zone (6), characterized in that, The application relates to a fire extinguishing device. The fire extinguishing device comprises: a plurality of air injection pipes (1) which are arranged at intervals along the height direction of a fire extinguishing protection area (6) to form a plurality of air injection areas (3), wherein the air injection pipes (1) in each air injection area (3) are arranged around the periphery of the fire extinguishing protection area (6) and are provided with a plurality of nozzles (2) at intervals; a fire extinguishing device (7) which is arranged outside the fire extinguishing protection area (6), wherein the air outlet end of the fire extinguishing device (7) is provided with a master control valve (12) and is connected to the air injection pipes (1) in the plurality of air injection areas (3) through a plurality of air supply pipes (4), and two secondary selection valves (5) are arranged on the air injection pipes (1), and the two secondary selection valves (5) are respectively arranged on the two sides of the connection between the air supply pipe (4) and the air injection pipe (1) to divide each air injection area (3) into two local air injection areas (31), and each local air injection area (31) is provided with a fire extinguishing agent concentration monitoring device (9); a plurality of fire monitoring devices (8) which are uniformly arranged in the fire extinguishing protection area (6) and are used for monitoring whether a fire occurs in the fire extinguishing protection area (6) in real time; and a control device which is signal-connected with the master control valve (12), the secondary selection valves (5), the fire extinguishing agent concentration monitoring devices (9) and the fire monitoring devices (8). The plurality of air injection areas (3) comprise at least three layers, and the highest air injection area (3) is arranged at the top end of the fire extinguishing protection area (6). The air injection pipes (1) in the highest air injection area (3) comprise a plurality of short pipes which are connected in a mesh structure, a plurality of nozzles (2) are arranged at intervals on each short pipe, and one short pipe is connected to the air supply pipe (4). The air injection pipes (1) in the remaining air injection areas (3) are annular structures and are arranged around the periphery of the fire extinguishing protection area (6).

2. The multiple directional discharge high bay gaseous fire suppression system of claim 1, wherein, Each local air injection area (31) is further provided with an oxygen concentration monitoring device (10), and the oxygen concentration monitoring device (10) is signal-connected with the control device.

3. The multiple directional discharge high bay gaseous fire suppression system of claim 2, wherein, A primary selection valve (11) is arranged on the air supply pipe (4) between the master control valve (12) and the secondary selection valves (5).

4. The multiple directional discharge high bay gaseous fire suppression system of claim 1, wherein, The control device comprises a control panel and automatic buttons, manual buttons and emergency stop buttons which are arranged on the control panel.

5. The multiple directional discharge high bay gaseous fire suppression system of claim 1, wherein, ​ 6. The multiple directional discharge high bay gaseous fire suppression system of claim 1, wherein, ​ 7. The multiple directed discharge high bay gas fire suppression system of any of claims 1 to 6, wherein, ​

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