JP4991382B2 - Pre-actuated automatic fire extinguishing equipment - Google Patents

Description

  The present invention relates to a fire extinguishing equipment using a sprinkler head, and relates to a pre-actuated automatic fire extinguishing equipment capable of comprehensively controlling fire extinguishing monitoring areas provided in a plurality of areas such as department stores and offices.

  Conventionally, a sprinkler head and a fire detector are installed on each floor in a commercial facility, etc., and a valve device for controlling water supply to the sprinkler head on each floor and a relay device for sending an activation signal to the valve device are provided. When the vessel senses a fire, it sends a start signal to the repeater on the floor, and when the repeater receives the start signal, it opens the corresponding valve device and enables the sprinkler head to supply water, There has been proposed a sprinkler fire extinguishing facility that discharges water from a head when the head is opened by the heat of a fire (Patent Documents 1 and 2).

JP-A-7-59875 JP 7-116284 A

  By the way, since the conventional sprinkler equipment is configured to open the valve by inputting a start signal based on the fire detection of the fire detector, when the sprinkler head is opened due to malfunction or the like, the fire extinguishing operation is started immediately. In this case, there is a problem that water loss increases.

  In addition, in the techniques of each of the above-mentioned patent documents, if a fire extinguishing operation by pre-operation is to be realized, it is necessary to control repeaters in all areas with one control panel, and the overall control becomes complicated.

  The present invention has been made in view of the above-described conventional apparatus, and is capable of simplifying the overall control and realizing efficient wiring while realizing a fire extinguishing operation by a pre-operation, and a pre-acting automatic fire-extinguishing capable of realizing efficient wiring. The purpose is to provide equipment.

In order to solve the above object, the present invention
First, a plurality of sprinkler heads, a fire detector, a pre-acting valve device for supplying fire water to the sprinkler head, and a repeater for controlling the opening of the main valve of the pre-acting valve device. Fire extinguishing equipment in one area, the bypass valve for connecting the primary side and the secondary side of the main valve is provided in the pre-actuating valve device, and the pressure regulating electric valve for opening and closing the bypass pipe is provided, Are provided in each of a plurality of areas, and the repeaters in each area are connected by a signal line to be connected to the fire detectors in each area. The operation signals from the fire detectors are received and generated. Address recognition means capable of recognizing the address of the area where the sensor is present, sensor activation signal generation means for generating a sensor activation signal to which the recognized address is added, and the sensor activation signal as the respective sensors. A control device having a transmission means for transmitting to the repeater of the network, wherein the repeater compares an address included in the sensor operation signal sent from the control device with its own address. Storage holding means for storing and holding that when the address matches its own address, first secondary pressure reduction detection means for detecting a pressure drop associated with the opening of the sprinkler head, and the first Pressure adjusting electric valve driving means for opening the pressure adjusting electric valve based on the detection of the secondary pressure drop by the secondary pressure reduction detecting means, and after the opening of the pressure adjusting electric valve, a second secondary圧減detecting means for detecting a further decrease is detected and the memory holding operation of the memory holding means, the decrease in secondary pressure according to the second secondary圧減detecting means as an aND condition AN A pre-acting type comprising: a condition detecting means; and an electrically operated valve driving means for opening the main valve of the pre-acting valve device when an AND condition by the AND condition detecting means is satisfied. Consists of automatic fire extinguishing equipment.

The pre-actuated valve device can be constituted by, for example, a pre-actuated running water detector (3A, 3B, 3C). The address recognition means can be constituted by, for example, a sensor activation signal detection means (6c-1), an address detection means (6c-2), an address storage means (6c-3) and the like. The said control apparatus can be comprised by the automatic fire alarm panel (5) and a control panel (6), for example. The first secondary pressure reduction detection means is, for example, a secondary pressure reduction detection means (27-7) for pressure regulation, and the second secondary pressure reduction detection means is, for example, a secondary pressure reduction detection means for alarm (27-9). ). If comprised in this way, the connection of a control apparatus and a repeater can communicate with the repeater of each area only by connecting a control apparatus and the repeater of one area, and a pre-acting valve apparatus and Wiring can be simplified as a whole because electrical connection with the repeater need only be made for each area. In addition, a fire extinguishing operation by pre-operation that opens the motorized valve for operation by “AND condition” of sensor operation and sprinkler head opening was realized by providing the AND condition detection function for each repeater in each area. Therefore, the control burden of the control device that monitors all areas can be reduced.

With the configuration as this, after watching the decrease of pressure in the secondary side in two stages, since opening the main valve, it is possible to prevent damage to the minimum water loss accident by preventing a malfunction.

Since the present invention is configured as described above, the present invention can be applied to a wide range of areas, can realize a fire extinguishing operation by a pre-operation, can simplify the overall control, and can realize an efficient wiring. A type automatic fire extinguishing system can be realized. In addition, since the main valve is opened after monitoring the decrease in the pressure on the secondary side in two stages, it is possible to prevent malfunction and prevent damage from water loss.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.
FIG. 1 is a diagram showing an overall configuration of the present invention, in which A, B, and C indicate areas such as a three-story commercial facility, and area A is an area on the first floor of the facility, Area B is the second floor area of the facility, and area C is the third floor area of the facility. This area A, B, and C is not limited to this, and a wide first floor portion such as a factory may be divided into three areas A, B, and C, and each of the three commercial facilities may be divided into area A and area. B or area C may be used. Of course, more areas may be provided, and for example, three areas A, B, and C may be provided on each of a plurality of floors of the apartment building.

  In the figure, 1A is a plurality of sprinkler heads installed in the area A, 1B is a plurality of sprinkler heads installed in the area B, and 1C is a plurality of sprinkler heads installed in the area C. The heads are connected to pre-actuated water flow detectors 3A, 3B, 3C installed on each floor by sprinkler pipes 2A, 2B, 2C in each area. In addition, in this embodiment, it is what is called a wet sprinkler equipment, and the fire warning state is set in a state in which the sprinkler pipes 2A to 2C are filled with extinguishing water up to the tip ends of the sprinkler heads 1A to 1C. .

  4A, 4B, and 4C are fire detectors installed in each area, and each of the fire detectors 4A to 4C is connected to an automatic fire alarm panel 5 provided at one place of the commercial facility building. They are connected by 4a, 4b, 4c. These fire detectors 4A to 4C are configured to transmit an operation signal to the automatic fire alarm panel 5 through the signal lines 4a, 4b and 4c when the occurrence of fire is detected by heat. .

  The automatic fire alarm panel 5 is connected to the signal lines 4a, 4b, and 4c. When the sensing signal is received through the signal lines 4a, 4b, and 4c, the terminal board 6a of the control panel 6 in the next stage. The above-mentioned operation signal is sent out.

  Reference numeral 6 denotes a control panel (see FIG. 2), and a terminal board 6a to which signal lines 4a ′, 4b ′, 4c ′ corresponding to the signal lines 4a, 4b, 4c are connected, and a signal from the terminal board 6a. An input unit 6b for receiving an input and an arithmetic unit 6c for receiving an operation signal from the input unit 6b and generating a sensor operation signal to which a fire area address is added are provided. The arithmetic unit 6c detects the operation signal (see the operation signal detection means 6c-1 in FIG. 8), and determines from which of the areas A, B, and C the signal is the sensed signal (P2 in FIG. 5). , The addresses “01”, “02”, “03” of the repeaters 7A to 7C corresponding to the corresponding areas A to C are recognized by referring to the address storage means 6c-3 (address detection means 6c- 2), the sensor activation signal S (FIG. 10) to which the address is added is generated (see sensor activation signal generation means 6c-4 in FIG. 8), and the signal S is sent to the communication unit 6d. (Refer to sending means 6c-5 in FIGS. 5P9 and 8).

  Further, the control panel 6 receives the sensor operation signal S from the arithmetic unit 6c and transmits the operation signal S to the repeater 7A via the terminal board 6e at the next stage, from the communication unit 6d. It is composed of a terminal board 6e for transmitting the sensor operation signal S to be input to the repeater 7A via the signal line 8. The control panel 6 and the repeater 7A are connected by a power line 9 for supplying power to the repeater 7A in addition to the communication line 8. The arithmetic device 6c is a computer having a CPU, and executes a program having the operation procedure shown in FIG.

  Next, since the pre-actuated water flow detection devices 3A, 3B, 3C have the same configuration, the pre-action water flow detection device 3A will be described with reference to FIG.

  The flowing water detection device 3A includes a primary side pipe 10 connected to a fire extinguishing water reservoir and a pump (not shown), a secondary side pipe 11 connected to a sprinkler pipe 2A connected to the sprinkler head 1A, and the primary side pipe. 10 and a wet pre-actuating valve 12 interposed between the secondary side pipe 11 and the pre-acting valve 12 between the primary side pipe 10 and the secondary side pipe 11. The control chamber 13 is provided through the opening 13a. The pre-actuating valve 12 has a main valve 16 that is normally closed in contact with the opening 13a by a spring 15 mounted on a rod 14 in the control chamber 13. In the pre-operated running water detection device 3A, in the fire alarm state, the primary side pipe 10, the secondary side pipe 11, and the control chamber 13 are filled with fire extinguishing water, and thus the sprinkler head 1A reaches the end of the sprinkler head 1A. Fire extinguishing water is filled through the pipe 2A.

  When PSW1 detects flowing water in the vicinity of the opening 13a based on the opening of the main valve 16, an alarm switch for sending an alarm signal to a repeater 7A to be described later, PSW2 is connected to the secondary pipe 11 and the sprinkler head 1A When the pressure drop of the secondary side pipe 11 due to the opening of the pressure is detected, a secondary pressure monitoring switch for regulating pressure that sends a secondary pressure reduction signal for regulating pressure to the relay 7A, PSW3 is also connected to the secondary side pipe 11 This is a warning secondary pressure monitoring switch that sends a warning secondary pressure reduction signal to the repeater 7A when a further drop in the secondary pressure is detected after the pressure regulating electric valve 17 described later is opened. .

  The primary side and the secondary side of the pre-actuating valve 12 are connected by a bypass pipe 17a, and the bypass pipe 17a is provided with a pressure regulating electric valve 17 that is normally closed. In parallel, a bypass pipe 18 is connected between the primary side and the secondary side. The bypass pipe 18 is connected to the actuated motor-operated valve 20 via a detection pipe 19, and the detection pipe 19 is connected to the control chamber 13 via a control pipe 21 from a branch point a in the middle of the pipeline. It is connected to the. The electrically operated valve 20 is connected to a drain pipe 22. In the fire alarm state, the bypass pipe 17a, the bypass pipe 18, and the actuation electric valve 20 of the detection pipe 19 of the pressure regulating electric valve 17 are filled with fire extinguishing water. The drive motor M1 of the pressure regulating motor valve 17 and the drive motor M2 of the actuation motor valve 20 are connected to the repeater 7A and are controlled to be opened and closed by drive signals from the repeater 7A. Has been.

  7A, 7B, and 7C are repeaters provided corresponding to the respective areas A, B, and C. The repeater 7A connects the terminal board 6e, the communication line 8, and the power supply line 9 of the control board 6. Therefore, it is connected. The repeater 7A and the repeater 7B, and the repeater 7B and the repeater 7C are also connected to each other by a communication line 8 'and a power supply line 9'. Since these repeaters 7A, 7B, and 7C have the same configuration, the repeater 7A will be described below with reference to FIG.

  The repeater 7A is connected to a power supply line 9 from the control panel 6 and a power supply line 9 'directed to the power supply unit of the next-stage repeater 7B, and supplies power to each part of the repeater 7A. A communication unit 26 is connected to the communication line 8 from the control panel 6 and the communication line 8 ′ connected to the communication unit of the next-stage repeater 7 B, and sends a sensor operation signal S input from the control panel 6 to the calculation unit 27. Have. The power supply unit 25 of the repeater 7A receives power supply via the power supply line 9, and supplies power to each part in the repeater 7A. The other repeaters 7B and 7C are similarly supplied with power via the power supply line 9 '.

  When the communication unit 26 of the repeater 7A receives the sensor activation signal S via the communication line 8, it sends the signal to the calculation unit 27 and also sequentially transmits it to the next-stage repeater 7B. is there.

  When the calculation unit 27 receives the sensor activation signal S from the communication unit 26 (such as the address detection unit 27-1 in FIG. 9), the address included in the input sensor activation signal S is an own address. (Refer to the address comparison means 27-2 and address storage means 27-3 in FIGS. 6P1 and P2 and FIG. 9), and if it is its own address, the fact that the sensor activation signal S has been input is stored and held. The data is stored and held in the means 27-5 (refer to the discriminating means 27-4 in FIG. 6P3 and FIG. 9). Return (FIG. 6P4). The arithmetic unit 27 is a computer having a CPU, and executes a program having the operation procedure shown in FIGS.

  Further, when the fire occurs in the area A, the sprinkler head 1A is opened by heat, and the calculation unit 27 receives the pressure regulation secondary pressure reduction signal via the input unit 28 (FIG. 7P1, P2, refer to the secondary pressure reduction detecting means 27-7 for pressure regulation in FIG. 9), and send the pressure regulating electric valve drive signal to the drive motor M1 of the pressure regulating electric valve 17 via the output unit 29 (FIG. 7P3, FIG. 9). The pressure regulating motor-operated valve driving means 27-8) and the pressure regulating motor-operated valve 17 are opened. Thereafter, when the secondary pressure further decreases and the alarm secondary pressure reduction signal is received via the input unit 28 (see alarm secondary pressure reduction detection means 27-9 in FIG. 7P4 and FIG. 9). At that time, it is detected whether or not the sensor detection signal S is already held (see AND condition detection means 27-6 in FIG. 7P5 and FIG. 9), and the sensor detection signal S is already held. Determines that a fire has occurred because the “AND condition” is satisfied, and sends an actuating motor valve drive signal to the actuating motor valve 20 via the output unit 29 (FIG. 7P6, (See the actuated electric valve drive means 27-10 in FIG. 9). At this time, if the sensor activation signal S is not held, for example, there is a possibility of malfunction of the sprinkler head 1A. Therefore, the actuated electric valve opening signal is not sent to prevent water loss to a minimum.

  When the motor operated valve 20 is opened, the fire extinguishing water in the control chamber 13 flows into the detection pipe 19 through the control pipe 21, so that the pressure in the control chamber 13 is reduced and the main valve 16 is opened. Fire extinguishing water flows into the secondary side, and fire water is sprinkled from the sprinkler head 1A. At this time, when the calculation unit 27 receives a flowing water signal from the alarm switch PSW1 via the input unit 28 (see FIG. 7P9, the flowing water signal detection means 27-11 in FIG. 9), the calculation unit 27 is connected to the calculation device 6c of the control panel 6. The pre-acting valve running water indicator lamp 6g (see FIG. 2) is instructed to turn on (P10 in FIG. 7). As a result, the indicator lamp 6g on the control panel 6 is turned on to warn that the main valve 16 has been opened.

  Reference numeral 28 denotes the input unit, to which an alarm switch PSW1, a pressure regulating secondary pressure monitoring switch PSW3, and an alarm secondary pressure monitoring switch PSW2 are connected, and received when receiving various detection signals from each switch. The signal is sent to the calculation unit 27.

  Reference numeral 29 denotes an output unit to which the drive motors M1 and M2 of the pressure regulating motor operated valve 17 and the operating motor operated valve 20 are connected, and is driven with respect to the motor operated valves based on a command from the computing unit 27. A signal is transmitted.

  FIG. 8 is a functional block diagram for explaining the function of the arithmetic unit 6c of the control panel 6, and FIG. 9 is a functional block diagram for explaining the function of the arithmetic unit 27 of the repeater 7A. These functions will be described together with flowcharts in the operation description section.

Since the present invention is configured as described above, its operation will be described below.
(1) Operation of Fire Detector First, the operation when the fire detector 4B in area B is activated will be described. When the sensor 4B detects heat, an operation signal is input to the automatic fire alarm panel 5 via the communication line 4b, and the operation signal is input to the terminal panel 6a of the control panel 6 via the signal line 4b ′. Furthermore, it inputs into the arithmetic unit 6c via the input part 6b.

  Based on the input of the operation signal (FIG. 5P1), the arithmetic device 6c (sensor operation signal detection means 6c-1) specifies from which area the signal is a signal (FIG. 5P2). In this case, since the operation signal is input via the signal lines 4b and 4b ′, the arithmetic device 6c (address detection means 6c-2) determines that the signal is from the area B (P5 and P6 in FIG. 5). .

  Then, the arithmetic device 6c (address detection means 6c-2) reads the address “02” of the repeater 7B corresponding to the area B corresponding to the operation signal from the address storage means 6c-3, and also detects the sensor operation signal generation means 6c. -4 generates the sensor activation signal S to which the address "02" and the command CM are added (FIG. 10), and the transmission unit 6c-5 instructs the communication unit 6d to transmit the signal S to the repeater. (FIG. 5P9). The communication unit 6d sends the sensor operation signal S to which the address “02” is added to the communication line 8 through the terminal board 6e. Thereby, the sensor activation signal S is transmitted to all the repeaters 7A, 7B, 7C.

  The sensor activation signal S is input to the communication unit 26 of the repeater 7A via the communication line 8, and further input to the calculation unit 27. When the arithmetic unit 27 (address detecting means 27-1) of the repeater 7A receives the input of the sensor activation signal S (P1 in FIG. 6), the address comparing means 27-2 determines that the address included in the signal S is its own. In this case, since the address “02” included in the signal is different from the self address “01” (FIG. 6P2), the process is terminated without performing the memory holding operation. Note that the same operation is performed in the repeater 7C, and the process ends (P4 in FIG. 6).

  In the repeater 7B, when the sensor operation signal S is similarly input to the calculation unit 27 (address detection means 27-1) (FIG. 6P1), the calculation unit 27 (address comparison means 27-2) It is determined whether or not the address “02” included in the address and its own address “02” stored in advance in the address storage unit 27-3 are the same (FIG. 6P2). The computing unit 27 (discriminating means 27-4) stores and holds in the memory (memory holding means 27-5) M that the sensor operation signal of its own area B is input (P3 in FIG. 6). Thereafter, the secondary pressure reduction signal for pressure regulation is input standby (FIG. 6P5).

(2) Opening of Sprinkler Head Next, in the area B, when the sprinkler head 1B is opened by heat, fire extinguishing water in the sprinkler pipe 2B is discharged from the head 1B. Then, since the pressure of the secondary side pipe 11 of the pre-actuating valve 12 decreases, the secondary pressure monitoring switch for pressure regulation PSW2 is turned on, and the secondary pressure reduction signal for pressure regulation is sent to the calculation unit 27 (second pressure regulation secondary pressure signal). The next pressure reduction detecting means 27-7) is inputted via the input unit 28.
(FIG. 7 P1, P2).

  The arithmetic unit 27 (regulating electric valve driving means 27-8) sends the adjusting electric valve opening drive signal to the adjusting electric valve 17 via the output unit 29 in response to the input of the secondary pressure reducing signal for adjusting. (FIG. 7P3). Then, the pressure regulating motor-operated valve 17 is opened, whereby the fire-extinguishing water flows from the primary side to the secondary side via the bypass pipe 17a, and the fire-extinguishing water from the opened sprinkler head 1B is continuously discharged. As a result, when the secondary pressure further decreases and the alarm secondary pressure monitoring switch PSW3 detects a further decrease in the secondary pressure, the alarm secondary pressure decrease signal is output to the calculation unit 27 of the repeater 7B. (Alarm secondary pressure reduction detecting means 27-9) is input via the input unit 28 (FIGS. 7P3 and P4).

  Then, the arithmetic unit 27 (AND condition detecting means 27-6) determines whether or not the sensor activation signal S is stored in the memory M (the address “02” of the sensor activation signal S and the relay's own). Whether or not the addresses match is held (FIG. 7P5). In this case, since the memory M is held, the memory holding operation and the alarm secondary It is determined that the “AND condition” of the input of the pressure reduction signal is satisfied, and the actuating electric valve driving means 27-10 sends the actuating electric valve driving signal to the actuating electric valve 20 via the output unit 29. (P6 in FIG. 7).

  Then, the actuating electric valve 20 is opened, whereby the fire extinguishing water in the control chamber 13 flows out through the control pipe 21 via the actuating electric valve 20 in the direction of the water distribution pipe 22. Since the pressure decreases, the main valve 16 opens against the urging force of the spring 15 due to the pressure of the primary side fire extinguishing water, thereby the fire extinguishing water from the primary side pipe 10 to the secondary side pipe 11 via the opening 13a. Flows out, fire extinguishing water is discharged from the open sprinkler head 1B, and the fire extinguishing operation is continued.

  At this time, the alarm switch PSW1 detects the flowing water from the primary side to the secondary side, and the flowing water signal is input to the computing unit 27 (running water signal detecting means 27-11) of the repeater 7B via the input unit 28. The computing unit 27 detects this (P9 in FIG. 7), turns on the indicator light 6g that the pre-actuating valve has been opened, and displays a warning indicating that the main valve 16 is open (FIG. 7P10).

  In step P5 in FIG. 7, if the sensor activation signal S is not stored in the memory M, there is a possibility that the sprinkler head 1B malfunctions. Wait until the device activation signal is input (P7 in FIG. 7). In the standby state, when the sensor operation signal S is input, it is determined that the “AND condition” is satisfied, and the process proceeds to Step P6 to perform the opening operation of the actuation motor operated valve 20 (P8 in FIG. 7).

  As described above, according to the present invention, the control panel 6 and each repeater can be connected to each other by simply connecting the control panel 6 and the repeater 7A in one area. Since the electrical connection between the pre-actuated running water detection device 3A and the like and the repeater 7A and the like need only be made for each area, the wiring can be simplified as a whole.

  In addition, a fire extinguishing operation by a pre-operation that opens the motor-operated valve 20 by “AND condition” of activation of the fire detector 4A and the like and opening of the sprinkler head 1A or the like is detected for each repeater 7A in each area. Since this is realized by providing functions, it is possible to lighten the control burden on the control panel 6 that monitors all areas and to efficiently monitor a wide range of monitoring areas with a simple configuration.

In addition, since the main valve 16 is opened after monitoring the decrease in the pressure on the secondary side in two stages, it is possible to prevent malfunction and prevent damage from water loss accidents to a minimum.
In FIG. 2, 6f is an operation panel of the control panel.

  The pre-actuated automatic fire extinguishing apparatus of the present invention can be widely used as a fire extinguishing apparatus for monitoring the entire area of a wide area such as a low-rise or high-rise commercial facility, a factory facility over a wide area, and the like.

It is a figure which shows the whole structure of the pre-operation type automatic fire extinguishing equipment of this invention. It is a block diagram of a control panel of the same equipment. It is a block diagram of the repeater and pre-operated running water detection device of the same equipment. It is a block diagram of the pre-operation type | formula flowing water detection apparatus of an installation same as the above. It is a flowchart which shows the operation | movement procedure of the arithmetic unit of the control panel of an equipment same as the above. It is a flowchart which shows the operation | movement procedure of the calculating part of the repeater of an equipment same as the above. It is a flowchart which shows the operation | movement procedure of the calculating part of the repeater of an equipment same as the above. It is a functional block diagram of the arithmetic unit of the control panel of an equipment same as the above. It is a functional block diagram of the calculating part of the repeater of an equipment same as the above. It is a figure which shows the sensor operation signal of an installation same as the above.

Explanation of symbols

1A, 1B, 1C Sprinkler head 3A, 3B, 3C Pre-actuated water flow detector 4A, 4B, 4C Fire detector 5 Automatic fire alarm panel 6 Control panel 6c Computing device 6c-1 Operation signal detection means 6c-2 Address detection means 6c-3 Address storage means 6c-4 Sensor operation signal generation means 6c-5 Transmission means 7A, 7B, 7C Repeater 8, 8 'Signal line 9, 9' Power line 12 Pre-acting valve 16 Main valve 17 Electric motor for pressure regulation Valve 17a Bypass pipe 27 Calculation section 27-2 Address comparison means 27-6 AND condition detection means 27-7 Pressure regulation secondary pressure reduction detection means 27-8 Pressure regulation electric valve drive means 27-9 Alarm secondary pressure reduction detection Means 27-10 Actuated electric valve drive means A, B, C area

Claims (1)

Fire extinguishment in one area by a plurality of sprinkler heads, a fire detector, a pre-acting valve device for supplying fire water to the sprinkler head, and a relay for controlling the opening of the main valve of the pre-acting valve device Constituting a facility, providing a pressure regulating electric valve for opening and closing the bypass pipe by providing a bypass pipe connecting the primary side and the secondary side of the main valve to the pre-acting valve device;
The fire extinguishing equipment is provided in each of a plurality of areas and the repeaters in each area are connected by signal lines.
Address recognition means connected to the fire detectors in each area, receiving an activation signal from the fire detector and recognizing the address of the area where the sensor that issued the activation signal exists, and the recognized address A control device having a sensor operation signal generating means for generating a sensor operation signal to which is added, and a transmission means for transmitting the sensor operation signal to the repeaters in each area,
The repeater includes address comparison means for comparing an address included in the sensor operation signal sent from the control device with its own address;
Storage holding means for storing and holding that when the address matches its own address;
First secondary pressure reduction detection means for detecting a pressure drop associated with the opening of the sprinkler head;
A pressure-regulating electric valve driving means for opening the pressure-regulating electric valve based on detection of a secondary pressure drop by the first secondary pressure reduction detecting means;
Second secondary pressure reduction detecting means for detecting a further decrease in the secondary side pressure after opening the pressure regulating electric valve;
And the memory holding operation of the memory holding unit, an AND condition detecting means for detecting a decrease in the secondary pressure according to the second secondary圧減detecting means as an AND condition,
A pre-actuated automatic fire extinguishing system, comprising: an electrically operated valve driving means for opening the main valve of the pre-actuating valve device when an AND condition by the AND condition detecting means is satisfied.

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