JPH06105927A - Pre-operated sprinkler fire extinguishing equipment - Google Patents

Abstract

(57) [Summary] (Modified) [Purpose] Regarding pre-actuated sprinkler fire extinguishing equipment, if the sensor line is broken, the pre-actuated running water detection device should be opened to ensure proper extinction. To aim. The pre-operation valve control panel 87 is provided with a control means 142 for outputting an opening signal to the pre-operation type running water detection device 60 when the detector line 141 connecting the fire detector 86 is disconnected.

Description

Detailed Description of the Invention

[0001]

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 equipment, there are the following, for example. 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 water flow detection device with pressurized air, and a more sensitive fire detection than the closed type sprinkler head. A fire detector is placed on the ceiling of the protected area to detect a fire with this fire detector, the pre-operated flow detector is opened, and the pressurized water supply device is started.

During steady-state monitoring, the pressurized water is filled up to the primary side of the pre-operation type water flow detection device provided at the branch from the main pipe for each protected area. Pressurized air from the compressor is filled in the pipe from the secondary side to the closed type sprinkler head. On the other hand, the decompression alarm device is monitoring the pressurization state, and the fire detector in the target area is on alert.

In the event of a fire, the fire detector responds to a sudden rise in temperature due to the fire, and activates the fire receiver and the pre-operation valve control panel, and the receiver gives an alarm / display for the fire area. At the same time, a pressurized water supply device such as a fire pump is started. In addition, the pre-operation valve control panel opens the pre-operation type water flow detection device in the corresponding area, and rapidly opens the pipe to the closed type sprinkler head in the stage before reaching the operation range due to the temperature rise near the fire source. When the head is filled with water and the heat is released from the head, pressurized air is released first, and then water is released to start fire fighting.

As a pre-operation type running water detection device used in this pre-operation type sprinkler fire extinguishing equipment, there are, for example, those shown in FIGS. 8 and 9. FIG. 8 shows a pre-operation type running water detection device in a steady monitoring state, in which the primary pipe 1 is filled with pressurized water for extinguishing the fire, and the priming chamber 2 is also filled with pressurized water on the primary side, before and after the clapper 3 which is a valve body. Since pressurized water of the same pressure is applied to the clapper 3, the clapper 3 is kept in a closed state due to the difference in area between the clapper 3 before and after (primary side 1: priming chamber side 2).

Secondary chamber 2 defined by clapper 3
A curved secondary pipe 4 is connected to A, 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 check valve 5 is kept closed because the secondary side of the clapper 5A of the check valve 5 and the branch pipe 6 are filled with compressed air, while the secondary pipe 4 is at atmospheric pressure. Be done.

The priming chamber 11 provided with a relief valve 7, a pressure gauge 8, a manual opening 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 steady 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. Further, the priming chamber 2 has an orifice 13, a two-way check valve 1
4 and the priming pipe 16 provided with the priming valve 15 are connected, and the priming pipe 16 is connected to the primary pipe 1 on the front side of the primary side control valve 17. At the time of restoration, the normally closed priming valve 15 is opened in the priming chamber 2 to supply the pressurized water of the primary pipe 1.
At the time of monitoring, pressurized water is supplied to the priming chamber 2 from the primary side pressurized water introducing pipe 18 connected to the primary side pipe 1 behind the primary side control valve 17 via the two-way check valve 14 and the orifice 13.

In the secondary side chamber 2A, the running water alarm pipe 1 is provided.
9 is connected, and the pressure switch 20 is connected to the running water alarm pipe 19.
Is provided. The pressure switch 20 is a secondary chamber 2A,
The rise in pressure in the secondary pipe 4 is detected. The pressure switch 20 has a water flow detection function. Ie clapper 3
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 produces a detection output.

The primary side pressurized water introducing pipe 18 is provided with a primary side drain valve 21 and a pressure gauge 22, and a pressure switch 20 is connected to the flowing water alarm pipe 19.
An alarm test valve 23 for performing the above test is provided. In addition to the running water alarm pipe 19, an auto drip 2
4 is connected to the drainage pipe 25, and the drainage pipe 25 is provided with an auxiliary drainage valve 26.

On the other hand, the check valve 5 is connected to an air supply pipe 27 for supplying compressed air from a compressor, and the air supply pipe 27 is provided with a pressure gauge 28, a pressure switch 29 and an air supply valve 30. 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 system drain valve 35 is provided in the drain pipe 34 connected to the check valve 5.

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

When the motor-operated valve 10 is opened, the pressurized water in the priming chamber 2 is
From the flow rate of the pressurized water that enters through the orifice 13,
Since the flow rate discharged to the starting pipe 11 is larger, the pressure is discharged to the drain side and the pressure drops, 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. Check valve 5 at this time
Since the filling air pressure in the secondary side of the branch pipe 6 is lower than the pressurized water pressure 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 as described above, 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-operation type water flow detection device, the primary side 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 one.

Then, a pre-operation valve control panel (not shown) is reset, and the priming valve 15 is opened with the electric valve 10 closed,
The pressurized water on the front side of the primary side control valve 17 is introduced into the priming chamber 2. After confirming that the pressure indicated by the pressure gauge 8 rises, drainage from the auxiliary drainage valve 26 disappears, and the clapper 3 is closed, the primary side control valve 17 is partially opened, and the primary side drainage valve is slowly opened. 21 is closed and the auxiliary drain valve 26 is closed. Further, after the 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 exhalation valve 15 is closed. In this way, the clapper 3 closes the opening of the primary pipe 1 due to the front-back 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 the warning area, and a fire from the fire detector is generated. Since the water is discharged by the operation of the signal and the sprinkler head, there was a problem that water was not discharged even if the sprinkler head was activated when the detector line connecting the fire detector was disconnected. .

In particular, water is not discharged and fires are not extinguished during times when there are no people (nighttime, holidays), which is extremely dangerous. The present invention has been made in view of such conventional problems, and when the detector line connecting the fire detector is broken, the running water detection device is opened to reliably extinguish the fire. It is an object of the present invention to provide a pre-operated sprinkler fire extinguishing system that can be performed.

[0018]

In order to achieve the above-mentioned object, the present invention, as shown in FIG. 1, fills pressurized water up to a pre-operation type running water detection device 60, and a pre-operation type running water detection device 60.
Thereafter, the branch pipe up to the sprinkler head 81 is filled with pressurized air, and the fire signal from the fire detector 86 or the pressure drop signal from the pressure detection device 101 for detecting the fire signal and the pressure drop in the branch pipe is received. Pre-operation valve control panel 8
The pre-operation type sprinkler fire extinguishing equipment which outputs an opening signal from the pre-operation type running water detection device 60 from 7 is targeted at the pre-operation valve control panel 87 when the sensor line 141 connecting the fire sensor 86 is disconnected. Pre-operation type water flow detector 60
It is characterized in that a control means 142 for outputting a release signal is provided.

The present invention also provides the pre-operation valve control panel 87.
In addition, a display means 144 for displaying a disconnection of the detector line 141 connecting the fire detector 86 is provided.

[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 disconnects the sensor line 141 connecting the fire sensor 86. When detected, the control means 14
2 outputs an open signal, and the pre-operation type running water detection device 60
Therefore, even if the sensor line 141 is disconnected, water can be discharged and the fire can be surely extinguished while the sprinkler head 81 is operating. It is especially 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 a pre-operation type sprinkler fire extinguishing equipment. In FIG. 3, reference numeral 51 is a fire extinguishing pump, and the fire extinguishing pump 51 pressurizes the fire extinguishing water from the water source water tank 52 and supplies it to a water supply main 54 that is vertically raised in the building through a sluice valve 53. The fire pump 51 is started and stopped by the fire pump control panel 55.

The tip of the main water supply pipe 54 is connected to an auxiliary elevated water tank 56 installed on the roof or the like. In addition, the water supply 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 pump car, and from the middle of the water supply main pipe 54, a primary pipe 59 which is a branch pipe branches for each floor. The primary pipe 59 is connected to the pre-operation type running water detection device 60.

A pressure tank 61 is branched and connected to the secondary side of the sluice valve 53 of the main water supply pipe 54 so that the internal pressure of the main water supply pipe 54 is always maintained at a prescribed pressure. In addition, a water tank 63 is provided at a predetermined height near the fire pump 51.
Is installed, and the priming water supply pipe 64 is connected to the discharge side of the fire pump 51 from the priming tank 63. This water tank 63 is provided with a water level sensor 65, and the water level sensor 65 has an upper limit electrode 66, a lower limit electrode 67, and a common electrode 68.

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

A compressor 70 is provided in the vicinity of the pump control panel 55, and compressed air from the compressor 70 is pre-operated flowing water detection device via an air pipe 71, 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 type sprinkler heads 81 are connected to the branch pipe 80. In the steady monitoring state, compressed air is enclosed in the branch pipe 80.
When the pre-operation type running water detection device 60 is activated, the fire pump 5
The pressurized water from 1 is supplied into the branch pipe 80.

An end test device 82 is provided at the end of the branch pipe 80. The terminal testing device 82 has a pressure gauge 83, a drain valve 84, and an orifice 85 for flowing a flow rate corresponding to the operation of one sprinkler head 81. A plurality of fire detectors 86 are provided near the sprinkler head 81, and a fire signal or a recovery signal thereof is output to the pre-operation valve control panel 87. The pre-operation valve control panel 87 receives the fire signal from the fire detector 86, and the pre-operation type running water detection device 60.
Is activated and the operation is stopped by the restoration signal.

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

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

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

The air pipe 71 is provided with a control valve 75, a flow rate adjusting valve 76 with an orifice mechanism, and a check valve 77.
Normally, the flow rate adjusting valve 76 is closed, but the valve body has φ2.
A hole with a small diameter is opened, 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 rate adjusting valve 76. 99
Is a drainage pipe connected to the check valve 96.
9 is provided with a pressure gauge 100, a pressure switch 101, and a system drain valve 102.

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 damage of the pipe. It is detected and a pressure drop signal is sent to the pre-operation valve control panel 87. System drain valve 10
When a parent-child valve is used as 2, the running water test can be performed without flowing pressurized water to the sprinkler head 81. That is, the sluice valve 98 is closed, the fire detector 86 is activated, the pre-operation type water flow detection device 60 is activated, the fire extinguishing pump 51 is activated, and the flow rate of one sprinkler head 81 is flowed to test the flowing water. I do.

Reference numeral 103 is a priming pipe, and the priming pipe 103
Is connected to the priming chamber 93 and the other end is connected to the primary pipe 59. The pressurized water in the primary pipe 59 is supplied to the priming chamber 93 via the priming valve 104, the strainer 105, the check valve 106, the orifice 107, and the pressure gauge 108 which are normally open. A start-up pipe 109 is connected to the orifice 107 side of the priming pipe 103, and the start-up pipe 109 is connected to a drainage pipe through an electric valve (start valve) 110 that opens / closes in response to an opening / closing signal from the pre-operation control panel 87. It In addition, a manual opening valve 111 is provided in the starting pipe 109 in parallel with the electric valve 110.

The opening of the orifice 107 is determined by the priming pipe 10
3 is set so that the drainage amount of the starting pipe 109 when the electric valve 110 is opened is larger than the inflow amount from 3 to the priming chamber 93. Therefore, when the motor-operated valve 110 is opened, the pressure in the priming chamber 93 decreases, and the clapper 92 immediately opens when the pressure of the pressurized water in the primary pipe 59 exceeds the force of the spring 95 (see FIG. 2).

When the motor-operated valve 110 is closed, the pressurized water from the priming valve 104 and the orifice 107 is supplied to the priming chamber 93.
The pressure is gradually accumulated in the primary pipe 59 to become the same as the pressurized water in the primary pipe 59.
The force of 5 causes the clapper 92 to slowly close 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 the pressurized water flowing through the priming water pipe 103.

Reference numeral 112 is a flowing water alarm pipe, and one end of the flowing water alarm pipe 112 is connected to the secondary side chamber 94 of the main body 91.
The other end is connected to the drainage 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 water flow detection function and outputs a water flow alarm signal to the pre-operation valve control panel 87. The orifice 117 is capable of providing a sufficient flow rate for the pressure switch 116 to be instantly turned on when the clapper 92 is open and to have sufficient drainage to be instantly turned off when the clapper 92 is closed. Is set to a different opening.

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

In FIG. 4, the pre-operation valve control panel 87 is provided with a motor-operated valve 110 based on a fire signal from the fire detector 86 or a fire signal and a pressure drop signal from the pressure switch 101.
Output an open signal to. When outputting the release signal, the storage circuit 121 outputs the release signal when the fire signal from the fire detector 86 has been stored for a predetermined time.

Further, when the recovery signal from the fire detector 86 is received and the closing signal is output to the motor-operated valve 110, the delay circuit 122 delays for a predetermined time to perform the closing output. The delay time of the delay circuit 122 can be adjusted arbitrarily. The fire signal from the fire detector 86, the recovery signal, the pressure drop signal from the pressure switch 101, and the running water alarm signal from the pressure switch 116 are used as the pre-operation valve control panel 87.
The information is transferred to the self-fired alarm receiver 88 from and displayed on the self-fired alarm receiver 88.

The depressurization of the primary pipe 59 and the main water supply pipe 54 is detected by the pressure switch 62, the fire pump 51 is started by the pump control panel 55, and the operation of the fire pump 51 is displayed on the self-fire alarm receiver 88. It 140 is a disconnection detection circuit provided in the pre-operation valve control panel 87, and the disconnection detection circuit 140 is a detector line 141 for connecting the fire detector 86.
Disconnection detection signal and the disconnection detection signal to the control unit (control means)
To 142.

The control unit 142 controls the disconnection detection signal from the disconnection detection circuit 140, or the disconnection detection signal and the pressure switch 1.
When the pressure drop signal from 01 is received, an opening signal is output to the motor-operated valve 110 of the pre-operation type water flow detection device 60. In addition,
Even if the presence / absence switch 143 for detecting whether there is a person in the self-fire alarm receiver 88 is provided so that the control unit 142 outputs the open signal to the motor-operated valve 110 only when there is no person when the disconnection is detected. good.

Next, FIG. 5 is a view showing the pre-operation valve control board. In FIG. 5, reference numeral 123 denotes an indicator lamp for indicating the opening of the pre-operation valve in response to a water flow warning signal from the pressure switch 116.
Reference numeral 24 is an indicator light that indicates a fire by a fire signal from the fire detector 86, and 125 is an indicator light that indicates 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 tilted to the stop side. At this time, the indicator lamp 128 for displaying the switch caution blinks. Further, when performing the standby power supply test, the standby power supply switch 133 is tilted to the test side. If the indicator lamp 126 for indicating the AC power supply and the standby power supply test is red, the capacity of the standby power supply is normal.

Reference numeral 127 indicates an indicator light indicating that the standby power source is not connected, 129 indicates an electric valve closing confirmation indicator, 130 indicates that the accumulation circuit 121 is accumulating,
Reference numeral 131 is an indicator lamp for displaying a control line disconnection. Reference numeral 144 is an indicator light (display means) that indicates that the disconnection detection circuit 140 has detected the disconnection of the detector line 141 connecting the fire detector 86.

Further, 134 is a transfer stop switch for stopping the transfer to the self-fire alarm receiver 88, and 135 is a pre-operation valve interlocking stop switch. When the fire detector 86 does not operate and the pre-operation type water flow detection device 60 is manually opened, the manual release push button 136 is pressed. When the manual opening push button 136 is operated, the built-in LED lights up, and when the opening is completed, the pre-operation valve opening indicator light 123 lights up.

When the pre-operation type running water detecting device 60 is restored, the manual closing push button 137 is pushed until the electric lamp closing confirmation indicating lamp 129 is lit. In this case, the pre-operation valve interlocking stop switch 135 is set to the stop side for safety thereafter.
When the pre-operation type running water detection device 60 is restored, the pre-operation valve interlocking stop switch 125 is returned to interlocking. In addition, 138 is a fire recovery push button.

Next, FIG. 6 is a flow chart showing an operation procedure for extinguishing a fire when a disconnection is detected. In FIG. 6, step S1
It is assumed that a fire occurs, the sprinkler head 81 is activated in step S2, compressed air is released, and a pressure drop occurs. Although water is not discharged from the sprinkler head 81 at this stage, the pressure switch 101 detects a pressure decrease and sends a pressure decrease signal to the pre-operation 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 the 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. In addition, here, the control unit 1
Although 42 outputs the open signal based on the pressure drop signal and the disconnection detection signal, the open signal may be output only by the disconnection detection signal. In addition to these, an open signal may be output when the absence signal from the presence 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, and the priming chamber 93
The internal pressure decreases, the opening force of the pressurized water of the primary pipe 59 overcomes the force of the spring 95, and the clapper 92 opens.

At this time, the priming valve 104, the check valve 106,
Pressurized water flows into the priming chamber 93 through the orifice 107, but the amount of inflow is limited by the orifice 107,
Since the discharge 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 maintains the open state. When the clapper 92 separates from the opening of the primary pipe 59 and becomes in the open state, it communicates with the primary pipe 59 and the secondary side chamber 94 of the main body 91, and in step S7 the running water alarm pipe 11
Pressurized water flows into 2 and pressure switch 1 is pressed in step S8.
16 operates to detect running water and output a running water alarm signal to the pre-operation 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, decompression of the primary pipe 59 and the water supply main pipe 54 occurs in step S9, and step S1
At 0, this pressure reduction activates the pressure switch 62, and at step S11 the fire pump 51 is operated. On the other hand, as the clapper 92 is opened, the pressurized water pushes up the clapper 97 of the check valve 96 and flows into the branch pipe 80. Pressurized water is filled in the branch pipe 80 in step S12, and since the sprinkler head 81 is already operating at this time, water is discharged in step S13. Then, step S11
Since the fire extinguishing pump 51 is being operated in step S1,
Water is continuously discharged at 4.

Next, FIG. 7 is a flow chart showing an operation procedure for restoration upon detection of a disconnection. In FIG. 7, step S21
When the fire is extinguished in step S1, since the sensor line 141 is broken, the manual closing push button 137 is pressed in step S22. As a result, a closing signal is output to the electric valve 110, and the electric valve 110 closes the starting pipe 109 in step S23. Since the start-up pipe 109 is closed and the drainage chamber 93 is not drained, the priming valve 104, the check valve 106, and the orifice 1
When pressurized water is introduced into the priming chamber 93 from the priming pipe 103 via 07, and the water pressure in the primary pipe 59 and the water pressure in the priming chamber 93 become equal, the clapper 92 causes the area difference between the front and rear and the spring in step S24. The force of 95 causes the clapper 92 to slowly close the opening of the primary pipe 59.

When the clapper 92 is closed, the primary pipe 5
Since the flow of the pressurized water from 9 to the secondary side chamber 94 is stopped,
The pressure in the water flow warning pipe 112 decreases, and step S25
Then, the pressure switch 116 is turned off, and the output of the running water alarm signal is stopped in step S26. Meanwhile, Clapper 9
When the valve 2 is closed, the primary pipe 59 and the main water supply pipe 54 are not depressurized, and the pressure switch 62 is restored in step S27. By operating the recovery button provided on the pump control panel 55 in step S28, the fire pump 51 stops its operation.

In this embodiment, even if the detector line 141 connecting the fire detector 86 is disconnected, the disconnection detection circuit 140 detects it and outputs a release signal from the control unit 142 to the motor-operated valve 110. Therefore, the fire can be surely extinguished. It is especially effective when there are no people (nighttime, holidays). In the above embodiment, the fire sensor 86 was connected to the pre-operation valve control panel 80 via the sensor line 141, and the disconnection of the sensor line 141 was detected by the disconnection detection circuit 140. The device 86 is connected to the fire alarm receiver 88, the disconnection of the sensor line is detected by the disconnection detection circuit provided in the fire alarm receiver 88, and the detection signal is sent to the pre-operation valve control panel 80.
May be sent to.

[0054]

As described above, when the disconnection detection circuit is provided in the pre-operation valve control panel and the disconnection of the detector line connecting the fire detector is detected, the control unit outputs the open signal. Since the pre-operation type water flow detection device is opened, the fire can be surely extinguished even if the detector circuit of the fire detector is broken. Especially, it is effective when there are no people.

[Brief description of drawings]

FIG. 1 is a diagram showing an embodiment of the present invention.

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

[Figure 3] Overall view of the sprinkler fire extinguishing equipment

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

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

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

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

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

FIG. 9 is a diagram showing a conventional operating state.

[Explanation of symbols]

 51: Fire extinguishing pump 52: Water source water tank 53: Gate valve 54: Water supply main 55: Pump control panel 56: Auxiliary elevated water tank 57: Connection water supply port 58: Water supply pipe 59: Primary pipe 60: Pre-operation type water flow detector 61: Pressure tank 62: Pressure switch 63: Water tank 64: Water 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 87 Valve control panel 88: Self-fire alarm receiver 91: Main body 92: Clapper 93: Water chamber 94: Secondary side chamber 95: Spring 96: Check valve 97: Clapper 98: Gate valve 99: Drainage pipe 100: Pressure gauge 101: Pressure switch 102: System drainage valve 103: Irrigation pipe 104: Irrigation valve 105: Strainer 106: Check valve 107: Orifice 108: Pressure gauge 109: Piping for starting 110: Motorized valve 111: Manual opening valve 112: Flowing water alarm piping 113: Auxiliary drain valve 114: Strainer 115: Check valve 116: Pressure switch 117: Orifice 118: Test piping 119: Alarm test valve 121: Accumulation circuit 122: Delay circuit 123 to 131, 144: Indicator light 132: Acoustic stop switch 133: Standby power supply test switch 134: Notification stop switch 135: Pre-operation 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)

[Claims] Claims: 1. A pre-operated running water detector is filled with pressurized water, a branch pipe from the pre-operated running water detector to the sprinkler head is filled with pressurized air, and a fire signal from the fire detector or the fire signal and In a pre-actuated sprinkler fire extinguishing facility that outputs a release signal from a pre-operation valve control panel to a pre-operation water flow detection device in response to a pressure decrease signal from a pressure detection device that detects a pressure decrease in the branch pipe, A pre-actuation type sprinkler fire extinguishing facility, characterized in that the control panel is provided with control means for outputting an opening signal to the pre-action type running water detection device when the detector line connecting the fire detector is disconnected. 2. The pre-actuated sprinkler fire extinguisher equipment according to claim 1, wherein the pre-actuated valve control panel is provided with display means for displaying a disconnection of a detector line connecting the fire detector.