JP3238759B2 - Pre-actuated sprinkler fire extinguishing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pre-actuated sprinkler fire extinguishing system.

[0002]

2. Description of the Related Art As a conventional pre-operation type sprinkler fire extinguishing system, for example, there is the following one. In other words, in this pre-operation type sprinkler fire extinguishing system, a compressor is provided to pressurize the secondary side of the pre-operation type running water detection device with pressurized air, and the fire detection is more sensitive than the closed type sprinkler head. The fire detector is placed on the ceiling of the protected area, the fire detector detects the fire as soon as possible, opens the pre-actuated running water detection device, and starts the pressurized water supply device.

At the time of regular monitoring, the pressurized water is filled up to the primary side of a pre-operation type running water detection device provided at a branch from the main pipe for each protection area. Pressurized air from a compressor is filled in the pipe from the next side to the closed sprinkler head. On the other hand, the decompression warning device monitors the pressurized state, and the fire detector in the target area is on alert.

In the event of a fire, a fire detector detects the fire promptly in response to a rapid rise in temperature due to the fire, activates the fire receiver and the pre-actuation valve control panel, and the receiver gives an alarm / display of the fire area. At the same time, start the pressurized water supply device such as a fire pump. In addition, the pre-actuated valve control panel opens the pre-actuated running water detection device in the corresponding area, and quickly moves through the pipe to the closed type sprinkler head at the stage before reaching the operating range due to the temperature rise near the fire source. When the head is filled with water and the head is opened with heat, the pressurized air or the like is released first, followed by the release of water to start fire fighting.

[0005] As a pre-operation type running water detecting device used in this pre-operation type sprinkler fire extinguishing system, there is one as shown in Figs. 8 and 9, for example. FIG. 8 shows a pre-actuated running water detection device in a steady monitoring state, in which the primary pipe 1 is filled with pressurized water for fire extinguishing, the pressurized water on the primary side also enters the priming chamber 2, and before and after the clapper 3, which is a valve element. And the pressurized water of the same pressure is applied to the clapper 3, the clapper 3 is held in a closed state by the difference in the front and rear areas of the clapper 3 (primary side 1: priming chamber side 2).

The secondary chamber 2 defined by the clapper 3
A is connected to a curved secondary pipe 4, and a check valve 5 is connected to the secondary pipe 4. A branch pipe 6 to which a sprinkler head is connected is connected to the check valve 5. The secondary side of the clapper 5A of the check valve 5 and the inside of the branch pipe 6 are filled with compressed air, while the inside of the secondary pipe 4 is at atmospheric pressure, so that the check valve 5 is kept closed. It is.

A starting pipe 11 provided with a relief valve 7, a pressure gauge 8, a manual release valve 9, and a motor-operated valve 10 is connected to the priming chamber 2, and the motor-operated valve 10 is closed in a regular monitoring state. , The priming chamber 2 holds pressurized water. Relief valve 7
Is connected to the secondary side chamber 2A by a relief pipe 12. The orifice 13 and the two-way check valve 1 are provided in the priming chamber 2.
A priming pipe 16 provided with the priming valve 4 and the priming valve 15 is connected, and the priming pipe 16 is connected to the primary pipe 1 in front of the primary control valve 17. At the time of restoration, the normally closed priming valve 15 is opened to the priming chamber 2 and the pressurized water in the primary pipe 1 is supplied.
During monitoring, pressurized water is supplied to the priming chamber 2 from the primary pressurized water introduction pipe 18 connected to the primary pipe 1 behind the primary control valve 17 via the two-way check valve 14 and the orifice 13.

[0008] A running water alarm pipe 1 is provided in the secondary chamber 2A.
9 is connected, and a pressure switch 20
Is provided. The pressure switch 20 is connected to the secondary chamber 2A,
The pressure rise in the secondary pipe 4 is detected. This pressure switch 20 has a running water detection function. That is, clapper 3
When is opened, pressurized water flows into the secondary side chamber 2A and the secondary pipe 4 to increase the pressure, and the pressure switch 20 generates a detection output.

The primary side pressurized water introduction pipe 18 is provided with a primary side drain valve 21 and a pressure gauge 22, and a connection part with a flowing water alarm pipe 19 is provided with a pressure switch 20.
, An alarm test valve 23 is provided. In addition, the auto drip 2
The drain pipe 25 provided with the drain pipe 4 is connected thereto, and the drain pipe 25 is provided with an auxiliary drain valve 26.

On the other hand, an air supply pipe 27 for supplying compressed air from a compressor is connected to the check valve 5, and a pressure gauge 28, a pressure switch 29 and an air supply valve 30 are provided in the air supply pipe 27. An air bypass valve 32 and an orifice check nipple 33 are provided in a bypass pipe 31 of the air supply valve 30. A drainage pipe 34 connected to the check valve 5 is provided with a system drainage valve 35.

The pressure switch 29 operates as a pressure-reducing switch for detecting a pressure reduction of the pressurized air filled in the branch pipe 6, for example, a leak of compressed air due to a sprinkler head operation or damage to the piping. FIG. 9 is a diagram showing an operation state of the pre-operation type running water detection device. The opening operation of the pre-operation type running water detection device is performed by opening the electric valve 10 based on the operation signal of the fire detector.

When the electric valve 10 opens, the pressurized water in the priming chamber 2
From the flow rate of pressurized water that enters through the orifice 13,
Since the flow rate discharged to the starting pipe 11 is larger, the pressure is reduced by discharging to the drain side, and the clapper 3 is pushed by the pressurized water of the primary pipe 1 and opened as shown in FIG.
A, Pressurized water is supplied to the secondary pipe 4. At this time, check valve 5
Since the pressure of the filling air in the secondary pipe 6 and the branch pipe 6 is lower than the pressure of the pressurized water in the primary pipe 1, the clapper 5A is also opened, and the pressurized water is supplied to the sprinkler head.

In the opening operation of the clapper 3, the pressure switch 20 detects that the supply of the pressurized water from the secondary side chamber 2A has reached a predetermined pressure, and issues a running water alarm. Next, in order to restore the pre-actuated running water detection device, the primary control valve 17 is closed, and in this closed state, the system drain valve 35, the auxiliary drain valve 26, and the primary drain valve 2
Open 1.

Then, a pre-actuated valve control panel (not shown) is reset, and the priming valve 15 is opened with the motor-operated valve 10 closed.
The pressurized water before the primary side control valve 17 is introduced into the priming chamber 2. After confirming that the pressure indicated by the pressure gauge 8 has increased and drainage from the auxiliary drain valve 26 has ceased and the clapper 3 has been closed, the primary control valve 17 is partially opened, and the primary drain valve is slowly opened. 21 and the auxiliary drain valve 26 is closed. Further, after drainage in the branch pipe 6 is completed, the system drainage valve 35 is closed.

Then, the primary side control valve 17 is completely opened,
The priming valve 15 is closed. Thus, the clapper 3 closes the opening of the primary pipe 1 due to the front and rear area difference.

[0016]

However, in such a conventional pre-actuated sprinkler fire extinguishing system, a fire detector and a closed-type sprinkler head are provided in a guard area, and a fire from the fire detector is detected. Since the water is released by the signal and the operation of the sprinkler head, there is a problem that the water is not discharged even if the sprinkler head is activated when the detector line connecting the fire detector is disconnected. .

In particular, water is not discharged or extinguished during a time when no one is present (at night or on holidays), resulting in a very dangerous state. The present invention has been made in view of such a conventional problem, and when a detector line connecting a fire detector is disconnected, a fire extinguishing device is opened to surely extinguish a fire. An object of the present invention is to provide a pre-actuated sprinkler fire extinguishing system that can be performed.

[0018]

In order to achieve the above object, the present invention relates to a fire extinguishing pump 51 as shown in FIG.
Pre-actuated running water detection from water main 54 to which pressurized water is supplied
A branch pipe is pulled out through a device 60 and a closed sprinkler
Head 81 connected to the pre-actuated running water detector 60
Targeting fire signal receiving and pre-activated sprinkler fire extinguishing facility for outputting an opening signal to the pre-actuated water flow detection apparatus 60 from the pre-operated valve control board 87 from the fire detector 86 to fill the pressurized water to said pre In the operation valve control panel 87,
Disconnection of sensor lines 141 which connect the fire detector 86
Characterized in that a control unit 142 for outputting an opening signal to said pre-activated water flow detection apparatus 60 at the time of detection.

The present invention also relates to a pre-operation type running water detecting device.
Filled with pressurized water and closed after the pre-actuated running water detector
Fill the branch pipe to the sprinkler head with pressurized air, etc.
Fire signal from the fire detector or the fire signal and
Pressure from pressure detector that detects pressure drop in branch pipe
In response to the drop signal, the pre-operation type
Pre-actuated sprinkler that outputs an open signal to the detector
For the fire extinguishing equipment, the fire valve
Output when disconnection of sensor line connecting sensor is detected
Disconnection detection signal and pressure drop signal from the pressure detection device
Signal to the pre-actuated running water detector based on the
And a control means for applying force .

[0020]

According to the pre-operation type sprinkler fire extinguishing system of the present invention having such a configuration, the disconnection detection circuit 140 provided in the pre-operation valve control panel 87 detects the disconnection of the detector line 141 to which the fire detector 86 is connected. It can and has been detected, or disconnection detection signal
Signal and the pressure drop signal from the pressure detection device 101.
Then, an open signal is output from the control means 142 to open the pre-actuated running water detecting device 60,
Even when the wire is disconnected, when the sprinkler head 81 is operating, water can be discharged, and the fire can be reliably extinguished. In particular, it is effective when there are no people (nighttime, holidays).

[0021]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 7 are views showing an embodiment of the present invention.
FIG. 3 is an overall view showing the pre-operation type sprinkler fire extinguishing equipment. In FIG. 3, reference numeral 51 denotes a fire extinguishing pump. The fire extinguishing pump 51 pressurizes fire-extinguishing water from a water source water tank 52 and supplies the water to a main water supply pipe 54 which is set up in a vertical direction of the building via a gate valve 53. The fire pump 51 is started and stopped by a fire pump control panel 55.

The distal end of the water supply main pipe 54 is connected to an auxiliary elevated water tank 56 installed on a rooftop or the like. In addition, the water main 54
Is connected to another water supply pipe 58 having a connection water supply port 57 for connecting a pressurized water hose such as a fire extinguishing pump car, and a primary pipe 59 which is a branch pipe is branched from the middle of the water supply main pipe 54 for each floor. The primary pipe 59 is connected to a pre-operation type running water detection device 60.

Further, a pressure tank 61 is branched and connected to the secondary side of the gate valve 53 of the water supply main pipe 54 so that the pressure in the water supply main pipe 54 is always maintained at a specified pressure. A priming tank 63 is located at a predetermined height near the fire pump 51.
A priming water supply pipe 64 is connected from the priming tank 63 to the discharge side of the fire pump 51. A water level sensor 65 is provided in the priming tank 63, and the water level sensor 65 has an upper electrode 66, a lower electrode 67, and a common electrode 68.

The output of the water level sensor 65 is
5, the pump control panel 55 issues a full-water alarm (upper-limit alarm) and a water-reduction alarm (lower-limit alarm). In addition, a test pipe 69 for flowing a rated flow rate at the time of a pump performance test is branched and connected to the discharge side of the fire pump 51, and the end of the test pipe 69 is inserted into the water source water tank 52.

In the vicinity of the pump control panel 55, a compressor 70 is provided. Compressed air from the compressor 70 is supplied by an air pipe 71 through an air filter 72, an air dryer 73, and a regulator 74. 60. A branch pipe 80 is connected to the pre-operation type running water detection device 60, and a plurality of closed sprinkler heads 81 are connected to the branch pipe 80. In the steady monitoring state, compressed air is sealed in the branch pipe 80.
When the pre-operation type running water detection device 60 operates, the fire pump 5
The pressurized water from 1 is supplied into the branch pipe 80.

An end testing device 82 is provided at the end of the branch tube 80. The terminal test device 82 has a pressure gauge 83, a drain valve 84, and an orifice 85 that flows at a flow rate corresponding to one actuation of the sprinkler head 81. A plurality of fire detectors 86 are provided near the sprinkler head 81, and a fire signal or a recovery signal is output to the pre-actuation valve control panel 87. The pre-actuated valve control panel 87 receives the fire signal from the fire detector 86 and operates the pre-actuated running water detector 60.
And stop operation by the recovery signal.

The pre-actuation valve control panel 87 is provided with a fire detector 8
When the fire signal or the recovery signal from 6 is transferred to the self-fire alarm receiver 88 and a running water warning signal or a pressure drop signal indicating that the pressure of the compressed air has dropped is received from the pre-operation type running water detection device 60, These are transferred to the self-fire alarm receiver 88. The self-fire alarm receiver 88 performs a fire display, a pre-operation valve opening / closing display, a pump operation display, and the like.

Next, the pre-actuated running water detecting device will be described with reference to FIGS. 1 and 2. FIG. FIG. 1 shows a pre-operation type running water detection device in a steady monitoring state, and FIG. 2 shows a pre-operation type running water detection device in an operation state. In FIG. 1, reference numeral 91 denotes a main body of the pre-actuated running water detection device 60. A primary pipe 59 arranged in a horizontal direction is inserted into the main body 91, and the end thereof is open. The inside of the main body 91 is divided into a priming chamber 93 and a secondary chamber 94 by a clapper 92 which is a valve body,
The clapper 92 opens and closes the opening of the primary pipe 59. A spring 95 which is an elastic body is housed in the priming chamber 93.
The spring 95 presses the clapper 92 toward the opening. The primary pipe 59 is filled with pressurized water for fire extinguishing, and the priming chamber 93 is also filled with pressurized water of the same pressure.
The clapper 92 is kept closed by the force of the spring 95 and the area difference before and after (primary side 1: priming chamber side 2).

A check valve 96 is connected to the main body 91 in the vertical direction, and the check valve 96 is provided with a clapper 97. A branch pipe 80 to which the sprinkler head 81 is connected is connected to the check valve 96, and a gate valve 98 is provided at a connection portion between the check valve 96 and the branch pipe 80. An air pipe 71 for supplying compressed air is connected to the upper side of the checker 96 from the clapper 97, and a secondary side and a branch pipe 80 from the clapper 97.
Is filled with compressed air, and the secondary chamber 9 of the main body 91 is filled with compressed air.
Since 4 is atmospheric pressure, the clapper 97 is kept closed.

The air pipe 71 is provided with a control valve 75, a flow control valve 76 with an orifice mechanism, and a check valve 77.
Normally, the flow control valve 76 is in a closed state, but the valve body has φ2
A hole having a small diameter is provided, and compressed air is supplied from the hole. At the time of restoration, the compressed air is quickly supplied into the pipe by opening the flow control valve 76. 99
Is a drain pipe connected to the check valve 96, and the drain pipe 9
9, a pressure gauge 100, a pressure switch 101, and a system drain valve 102 are provided.

The pressure switch 101 serving as a pressure detecting device reduces the pressure of the compressed air filled in the secondary side of the check valve 96 and the branch pipe 80, for example, the leakage of the compressed air due to the operation of the sprinkler head 81 or the breakage of the piping. Detect and send a pressure drop signal to the pre-actuation valve control panel 87. System drain valve 10
When a parent-child valve is used as 2, a test of flowing water can be performed without flowing pressurized water through the sprinkler head 81. That is, the gate valve 98 is closed, the fire detector 86 is operated, the pre-operation type running water detecting device 60 is operated, the fire extinguishing pump 51 is started, and the flow rate of one sprinkler head 81 is operated, and the running water test is performed. I do.

Reference numeral 103 denotes a priming pipe.
Is connected to a priming chamber 93, and the other end is connected to a primary pipe 59. The pressurized water in the primary pipe 59 is supplied to the priming chamber 93 via the normally open priming valve 104, the strainer 105, the check valve 106, the orifice 107, and the pressure gauge 108. A starting pipe 109 is connected to the orifice 107 side of the priming pipe 103, and the starting pipe 109 is connected to a drain pipe via a motor-operated valve (starting valve) 110 that opens and closes according to an open / close signal from a pre-operation control panel 87. You. The starting pipe 109 is provided with a manual release valve 111 in parallel with the electric valve 110.

The opening of the orifice 107 is determined by the
The amount of water discharged from the starting pipe 109 when the motor-operated valve 110 is opened is set to be larger than the amount of water flowing into the priming chamber 93 from 3. Therefore, when the electric valve 110 is opened, the pressure in the priming chamber 93 decreases, and when the pressure of the pressurized water in the primary pipe 59 exceeds the force of the spring 95, the clapper 92 opens immediately (see FIG. 2).

When the electric valve 110 is closed, pressurized water from the priming valve 104 and the orifice 107 is supplied to the priming chamber 93.
The pressure is gradually increased to the same pressure as the pressurized water in the primary pipe 59, and the difference in the area before and after the clapper 92 and the spring 9
With the force of 5, the clapper 92 slowly closes the opening of the primary pipe 59. The check valve 106 sets only the flow of the pressurized water to the priming chamber 93 and prevents the backflow. The pressure gauge 108 measures the pressure of pressurized water flowing through the priming pipe 103.

Reference numeral 112 denotes a flowing water alarm pipe. One end of the flowing water alarm pipe 112 is connected to the secondary chamber 94 of the main body 91.
The other end is connected to a drain pipe. Auxiliary drain valve 113, strainer 114, check valve 115,
A pressure switch 116 and an orifice 117 are provided. When the clapper 92 is opened, the pressure switch 116 detects that the pressure of the pressurized water flowing into the flowing water alarm pipe 112 has reached a predetermined pressure. That is, the pressure switch 116 has a running water detection function, and outputs a running water alarm signal to the pre-actuation valve control panel 87. The orifice 117 is capable of providing a sufficient flow to turn on the pressure switch 116 instantaneously when the clapper 92 is open, and to provide sufficient drainage to turn off instantly when the clapper 92 is closed. Is set to a suitable opening.

An alarm test valve 119 is provided in a test pipe 118 connecting the flowing water alarm pipe 112 and the priming pipe 103, and by opening the alarm test valve 119,
The test of the pressure switch 116 is performed. Next, FIG. 4 is a block diagram showing the control and monitoring system in FIGS. 1 and 2.

In FIG. 4, the pre-actuating valve control panel 87 receives a fire signal from the fire detector 86 or a motorized valve 110 based on a fire signal and a pressure drop signal from the pressure switch 101.
Output an open signal to When the open signal is output, the open circuit is output by the storage circuit 121 when the fire signal from the fire detector 86 is stored for a predetermined time.

Further, upon receiving the recovery signal from the fire detector 86, when outputting the closing signal to the motor-operated valve 110, the delay circuit 122 delays the closing signal for a predetermined time to perform the closing output. The delay time of the delay circuit 122 can be adjusted arbitrarily. A fire signal from the fire detector 86, a recovery signal, a pressure drop signal from the pressure switch 101, and a running water alarm signal from the pressure switch 116 are transmitted to the pre-actuation valve control panel 87.
Is transferred to the self-fire alarm receiver 88 and displayed on the self-fire alarm receiver 88.

Further, the pressure reduction of the primary pipe 59 and the water supply main pipe 54 is detected by the pressure switch 62, the pump control panel 55 activates the fire extinguishing pump 51, and the operation of the fire extinguishing pump 51 is displayed on the self-fire alarm receiver 88. You. Reference numeral 140 denotes a disconnection detection circuit provided in the pre-actuation valve control panel 87. The disconnection detection circuit 140 is a detector line 141 for connecting the fire detector 86.
Control unit (control means) for detecting disconnection of
142.

The control unit 142 receives the disconnection detection signal from the disconnection detection circuit 140 or the disconnection detection signal and the pressure switch 1
When receiving the pressure drop signal from 01, it outputs an open signal to the motor-operated valve 110 of the pre-actuated running water detection device 60. In addition,
The presence / absence switch 143 for detecting whether or not there is a person in the self-fire alarm receiver 88 may be provided so that the control unit 142 outputs an open signal to the motor-operated valve 110 only when there is no person when disconnection is detected. good.

FIG. 5 is a diagram showing a pre-actuation valve control panel. In FIG. 5, reference numeral 123 denotes an indicator light for indicating that the pre-actuation valve has been opened by a running water warning signal from the pressure switch 116, and 1.
Reference numeral 24 denotes an indicator light for displaying a fire by a fire signal from the fire detector 86, and reference numeral 125 denotes an indicator light for indicating a decrease in air pressure by a pressure decrease signal from the pressure switch 101.

Reference numeral 139 denotes an audio device (buzzer). When the audio device 139 is stopped, the audio switch 132 is moved to the stop side. At this time, the indicator lamp 128 for displaying the switch attention flashes. When performing a backup power test, the backup power switch 133 is moved to the test side. If the indicator lamp 126 for displaying the AC power supply and the backup power supply test is red, the capacity of the backup power supply is normal.

Numeral 127 is an indicator light for indicating that the standby power supply is not connected, 129 is an indicator light for indicating that the motor-operated valve is closed, 130 is an indicator light for indicating that the accumulation circuit 121 is accumulating,
Reference numeral 131 denotes an indicator lamp for displaying a control line disconnection. Reference numeral 144 denotes a display lamp (display means) for displaying that the disconnection detection circuit 140 has detected disconnection of the detector line 141 connecting the fire detector 86.

Reference numeral 134 denotes a transmission stop switch for stopping transmission to the self-fire alarm receiver 88, and reference numeral 135 denotes a pre-actuation valve interlock stop switch. When the fire detector 86 does not operate and the pre-operation type running water detection device 60 is manually opened, the manual release push button 136 is pressed. When the manual release push button 136 is operated, the built-in LED is turned on, and when the release is completed, the indicator light 123 for opening the pre-actuated valve is turned on.

When the pre-operation type running water detecting device 60 is to be restored, the manual closing push button 137 is pressed until the indicator light 129 for confirming the closing of the motor-operated valve is turned on. In this case, for safety thereafter, the pre-actuated valve interlock stop switch 135 is set to the stop side.
When the pre-operation type running water detection device 60 is restored, the pre-operation valve interlock stop switch 125 is returned to interlock. 138 is a fire recovery push button.

Next, FIG. 6 is a flowchart showing an operation procedure of fire extinguishing when disconnection is detected. In FIG. 6, step S1
, A fire occurs, and the sprinkler head 81 is operated in step S2, the compressed air is released, and a pressure drop occurs. At this stage, water is not discharged from the sprinkler head 81, but the pressure switch 101 detects a pressure drop and sends a pressure drop signal to the pre-actuation valve control panel 87.

On the other hand, in step S3, the disconnection detection circuit 140
Detects the disconnection of the sensor line 141 and sends a disconnection detection signal to the control unit 142, the control unit 142 sends an open signal to the motor-operated valve 110 based on the pressure drop signal and the disconnection detection signal in step S4. send. Here, the control unit 1
Although the opening signal is output based on the pressure drop signal and the disconnection detection signal, the opening signal may be output only by the disconnection detection signal. In addition, an opening signal may be output when an absence signal from the presence / absence switch 143 is sent.

When the motor-operated valve 110 is opened in step S5, the pre-operation type running water detection device 60 is opened in step S6. That is, the pressurized water in the priming chamber 93 is drained from the starting pipe 109 via the electric valve 110,
The pressure in the inside decreases, and the opening force of the primary pipe 59 due to the pressurized water overcomes the force of the spring 95, and the clapper 92 opens.

At this time, the priming valve 104, the check valve 106,
The pressurized water flows into the priming chamber 93 through the orifice 107, but the inflow is restricted by the orifice 107,
Since the drainage amount of the starting pipe 109 due to the opening operation of the electric valve 110 is larger than the inflow amount, the clapper 92 keeps the open state. When the clapper 92 separates from the opening of the primary pipe 59 and is opened, the primary pipe 59 communicates with the secondary chamber 94 of the main body 91, and in step S7, the flowing water alarm pipe 11
2, pressurized water flows into the pressure switch 1 in step S8.
16 operates to detect flowing water and output a flowing water alarm signal to the pre-actuation valve control panel 87.

On the other hand, since the pressurized water on the primary side of the pre-operation type running water detection device 60 flows out to the secondary side, the pressure in the primary pipe 59 and the water supply main pipe 54 is reduced in step S9, and the flow proceeds to step S1.
When the pressure is reduced to 0, the pressure switch 62 is operated by this pressure reduction, and the fire pump 51 is operated in step S11. On the other hand, with the opening of the clapper 92, the pressurized water pushes up the clapper 97 of the check valve 96 and flows into the branch pipe 80. In step S12, pressurized water is filled in the branch pipe 80. At this time, since the sprinkler head 81 is already operating, water is discharged in step S13. Then, step S11
Since the fire extinguishing pump 51 is operating at step S1,
In step 4, water is continuously discharged.

Next, FIG. 7 is a flowchart showing the operation procedure of the recovery when the disconnection is detected. In FIG. 7, step S21
When the fire is extinguished, the manual closing push button 137 is pressed in step S22 because the sensor line 141 is disconnected. As a result, a closing signal is output to the motor-operated valve 110, and the motor-operated valve 110 closes the starting pipe 109 in step S23. The starting pipe 109 is closed, the drainage from the priming chamber 93 is not performed, and the priming valve 104, the check valve 106, the orifice 1
When the pressurized water is introduced into the priming chamber 93 from the priming pipe 103 through the pipe 07, and the water pressure of the primary pipe 59 and the water pressure of the priming chamber 93 become equal, in step S24, the clapper 92 is moved by the difference between the front and rear areas and the spring. Due to the force of 95, the clapper 92 slowly closes the opening of the primary pipe 59.

When the clapper 92 is closed, the primary pipe 5
Since the flow of pressurized water from 9 to the secondary side chamber 94 stops,
The pressure in the flowing water alarm pipe 112 decreases, and the
, The pressure switch 116 is turned off, and the output of the running water warning signal is stopped in step S26. Meanwhile, clapper 9
When the valve 2 is closed, the pressure in the primary pipe 59 and the water supply main pipe 54 is not reduced, and the pressure switch 62 is restored in step S27. In step S28, the fire pump 51 stops operating by operating the recovery button provided on the pump control panel 55.

In this embodiment, even if the detector line 141 connecting the fire detector 86 is disconnected, this is detected by the disconnection detection circuit 140 and an open signal is output from the control unit 142 to the motor-operated valve 110. Therefore, the fire can be reliably extinguished. In particular, it is effective when there are no people (nighttime, holidays). In the above embodiment, the fire detector 86 is connected to the pre-actuation valve control panel 80 via the detector line 141, and the disconnection of the detector line 141 is detected by the disconnection detection circuit 140. The sensor 86 is connected to the self-fire alarm receiver 88, and the disconnection of the sensor line is detected by a disconnection detection circuit provided in the self-fire alarm receiver 88, and the detection signal is detected.
May be transmitted.

[0054]

As described above, the disconnection detection circuit is provided in the pre-actuated valve control panel, and when the disconnection of the detector line connecting the fire detector is detected, an open signal is output by the control unit. Then, because the pre-operation type running water detection device was opened, even if the detector line of the fire detector was disconnected ,
Discharge water when the sprinkler head is working
It can, it is possible to perform reliably extinguished. This is particularly effective when there are no people.

[Brief description of the drawings]

FIG. 1 shows an embodiment of the present invention.

FIG. 2 is a diagram showing a valve open state;

FIG. 3 is an overall view showing a sprinkler fire extinguishing system.

FIG. 4 is a block diagram showing a control monitoring system;

FIG. 5 is a diagram showing a pre-actuation valve control panel;

FIG. 6 is a flowchart showing a fire extinguishing operation procedure when disconnection is detected.

FIG. 7 is a flowchart showing an operation procedure of recovery when disconnection is detected.

FIG. 8 is a diagram showing a conventional steady monitoring state;

FIG. 9 shows a conventional operating state.

[Explanation of symbols]

 51: fire pump 52: water source tank 53: gate valve 54: water supply main pipe 55: pump control panel 56: auxiliary elevated water tank 57: connecting water supply port 58: water supply pipe 59: primary pipe 60: pre-operation type running water detector 61: Pressure tank 62: pressure switch 63: priming tank 64: priming supply pipe 65: water level sensor 66: upper limit electrode 67: lower limit electrode 68: common electrode 69: test pipe 70: compressor 71: air pipe 72: air filter 73: air dryer 74: Regulator 75: Control valve 76: Flow control valve 77: Check valve 80: Branch pipe 81: Sprinkler head 82: Terminal test device 83: Pressure gauge 84: Drain valve 85: Orifice 86: Fire detector 87: Pre-operation Valve control panel 88: self-fire alarm receiver 91: main body 92: clapper 93: priming room 94: secondary side room 95: spring Gu 96: check valve 97: clapper 98: gate valve 99: drain pipe 100: pressure gauge 101: pressure switch 102: system drain valve 103: priming pipe 104: priming valve 105: strainer 106: check valve 107: Orifice 108: Pressure gauge 109: Starting pipe 110: Electric valve 111: Manual release valve 112: Running water alarm pipe 113: Auxiliary drain valve 114: Strainer 115: Check valve 116: Pressure switch 117: Orifice 118: Test pipe 119: Alarm test valve 121: Storage circuit 122: Delay circuit 123 to 131, 144: Indicator light 132: Sound stop switch 133: Standby power test switch 134: Transfer stop switch 135: Pre-actuated valve interlock stop switch 136: Manual release push button 137 : Manual close push button 138: Fire recovery push button 139 Acoustic device 140: disconnection detecting circuit 141: sensor lines 142: control section (control means) 143: stationary absence switch

Claims (2)

(57) [Claims] 1. A water supply unit to which pressurized water is supplied from a fire pump.
Pull out the branch pipe from the pipe via the pre-actuated running water detection device
A closed sprinkler head is connected, the pressurized water is filled up to the pre-operation type running water detector, and a release signal is output from the pre-operation valve control panel to the pre-operation type running water detector in response to a fire signal from a fire detector. in the pre-actuated sprinkler fire extinguishing systems, wherein the pre-actuated valve control panel, control means for outputting a <br/> opening signal to said pre-activated water flow detection device during disconnection detection of sensor lines connecting the fire detector A pre-actuated sprinkler fire extinguishing system characterized by the provision of: 2. Filling pressurized water up to the pre-operation type running water detector
And a closed-type sprinkler after the pre-actuated running water detection device.
-Fill the branch pipe to the head with pressurized air, etc. to detect fire
Fire signal from the vessel or the fire signal and the branch pipe
The pressure drop signal from the pressure detector that detects the pressure drop
Receiving from the pre-actuated valve control panel to the pre-actuated running water detector
For pre-actuated sprinkler fire extinguishing equipment that outputs an open signal
In this case, the fire detector is connected to the pre-actuation valve control panel.
Disconnection detection signal output when disconnection of
Pre-actuation type based on pressure drop signal from pressure detection device
Control means for outputting an open signal to the running water detection device is provided.
A pre-actuated sprinkler fire extinguishing system.