Fire extinguishing system

Abstract

If a break occurs in the wiring path, the fire pump system will not start even if the fire hydrant valve is opened, making it impossible to extinguish a fire. Furthermore, if a short circuit occurs in the wiring path, the fire pump system may malfunction even if the fire hydrant valve is not operated. The present invention aims to prevent such malfunctions of fire pump systems. [Solution] The fire hydrant system comprises a pump start switch for starting the fire hydrant pump and a terminal block having multiple terminals. Two internal wires are led out from one switch terminal of the pump start switch and connected to two terminals of the terminal block, and two other internal wires are led out from the other switch terminal and connected to the other two terminals of the terminal block.

Description

Technical Field

[0001] The present invention relates to a fire hydrant device and a fire protection system that discharge fire extinguishing substances such as fire extinguishing water and fire extinguishing foam.

Background Art

[0002] In tunnels such as highways and motorways, fire protection equipment is installed according to the structure of the tunnel, traffic volume, etc. Patent Document 1 describes tunnel emergency equipment including fire hydrant equipment provided in the tunnel. In this fire hydrant equipment, when a fire hydrant valve is opened, a pump start signal is transmitted to a fire pump device to start the fire pump device. Thereby, fire extinguishing water or the like can be discharged from a nozzle through the opened fire hydrant valve and a hose in the fire hydrant equipment.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] Fire hydrant equipment as described in Patent Document 1 is often installed in multiple units at intervals. In that case, in order to transmit a pump start signal to a disaster prevention receiving board, a plurality of fire hydrant equipment are connected to the disaster prevention receiving board using two wires, and a short circuit between the wires can be used as a pump start signal. However, if a disconnection occurs in the wiring path, the fire pump device will not start even if the fire hydrant valve is opened, and fire extinguishing cannot be performed. Further, when a short circuit occurs in the wiring path, the fire pump device will malfunction and start even though the fire hydrant valve has not been operated. An object of the present invention is to prevent such malfunction of the fire pump device.

Means for Solving the Problems

[0005] The present invention relates to a fire hydrant system comprising a pump start switch for starting the pump of a fire hydrant and a terminal block having a plurality of terminals, characterized in that two internal wires are led out from one switch terminal of the pump start switch and connected to two terminals of the terminal block, and two other internal wires are led out from the other switch terminal and connected to the other two terminals of the terminal block. [Effects of the Invention]

[0006] This invention makes it possible to monitor not only the signal wiring but also the wiring from the signal wiring to the pump activation switch within the fire hydrant system. [Brief explanation of the drawing]

[0007] [Figure 1] The status of fire hydrant installation in tunnels. [Figure 2] Conventional fire hydrant equipment and fire extinguishing systems. [Figure 3] A fire hydrant system and fire extinguishing system according to embodiments of the present invention. [Modes for carrying out the invention]

[0008] Figure 1 shows the installation of the fire hydrant device 1 in the tunnel 8 in an embodiment of the fire extinguishing system. A conventional fire hydrant device 9 is also installed in the same location as the fire hydrant device 1 and is therefore shown in Figure 1. In the equipment shown in Figure 1, the fire hydrant device 1 and other components are also installed inside a fire hydrant box 2 that houses a fire hose (not shown). The fire hydrant boxes 2 are installed at predetermined intervals inside the tunnel 8, and in the event of a fire, it is possible to take out a fire hose from the fire hose storage compartment 21 of the fire hydrant box 2 and discharge water. When water is discharged, the fire prevention receiving panel 3 receives an activation signal from one of the fire hydrant devices 9 via signal wiring 5 and signal wiring 6, and sends an activation signal to the pump control panel 41 of the fire pump device 4. Then, the pump control panel 41 of the fire pump device 4 activates the pump 42 and sends fire extinguishing water into the piping 7.

[0009] Figure 2 shows a fire extinguishing system equipped with multiple conventional fire hydrant devices 9. Each fire hydrant device 9 is equipped with an interlocking switch 91 that is linked to the fire hydrant valve, and the interlocking switch 91 is connected to a terminal block 92. The interlocking switch 91 is a pump start switch that starts the fire hydrant pump 42. The disaster prevention receiving panel 3 is connected to the terminal block 92 provided on each of the multiple fire hydrant devices 9 by signal wiring 5 and 6. The terminal block 92 is equipped with multiple connection terminals that are insulated from each other. In the fire hydrant device 9, the first connection terminal 921 is connected to the first switch terminal 911 of the interlocking switch 91 by internal wiring 94, and the second connection terminal 922 is connected to the second switch terminal 912 by internal wiring 95. The other terminals of the terminal block 92 are used for wiring of other components, such as the power supply for emergency lights.

[0010] Two signal wires, 5 and 6, are derived from the disaster prevention receiving panel 3. Each of these signal wires, 5 and 6, is connected to the terminal block 92 of each fire hydrant device 9 via a hop-up wire. One signal wire 5 connected to the disaster prevention receiving panel 3 connects the first connection terminal 921 of each fire hydrant device 9 in series. The other signal wire 6 connected to the disaster prevention receiving panel 3 connects the second connection terminal 922 of each fire hydrant device 9 in series. At the last fire hydrant device 9, the first connection terminal 921 and the second connection terminal 922 are connected by a terminating resistor 93.

[0011] When a fire occurs, either the first switch terminal 911 and the second switch terminal 912 short-circuit, causing the two signal wires 5 and 6 to short-circuit. This lowers the potential difference between signal wires 5 and 6, sending an activation signal to the disaster prevention receiving panel 3. When all interlocking switches 91 are open, current flows through the termination resistor 93, creating a predetermined potential difference. If signal wires 5 and 6 are cut somewhere, the current stops flowing, creating a high potential difference. Therefore, the disaster prevention receiving panel 3 can detect the break in signal wires 5 and 6.

[0012] In the conventional circuit configuration shown in Figure 2, it is possible to detect breaks in signal wires 5 and 6 as described above. However, it is not possible to detect breaks in internal wires 94 and 95 from terminal block 92 to interlocking switch 91, or when internal wires 94 and 95 are disconnected from terminal block 92. The present invention makes it possible to detect breaks even in such cases.

[0013] Figure 3 shows a fire extinguishing system equipped with multiple fire hydrant devices 1 according to an embodiment of the present invention. Three fire hydrant devices 1 are shown in Figure 3, but they have the same configuration, and reference numerals are omitted as appropriate. Each fire hydrant device 1 is provided with an interlocking switch 11 that is linked to the fire hydrant valve and a manual switch 12 that is manually activated, and is connected to a terminal block 13 via internal wiring 15. A push-button switch is an example of a manual switch 12. The interlocking switch 11 and the manual switch 12 are pump activation switches that activate the fire hydrant pump 42 shown in Figure 1.

[0014] The first connection terminal 131 of the fire hydrant device 1 is connected to the second connection terminal 132 via the third switch terminal 121 and second internal wiring 152 of the manual switch 12 from the first internal wiring 151. The second connection terminal 132 is then connected to the third connection terminal 133 via the first switch terminal 111 and fourth internal wiring 154 of the interlocking switch 11 from the third internal wiring 153. The third connection terminal 133 is connected to the first connection terminal 131 of the preceding fire hydrant device 1 or the disaster prevention receiving panel 3 via signal wiring 5, and the first connection terminal 131 is connected to the third connection terminal 133 of the next fire hydrant device 1 via the next signal wiring 5.

[0015] The fourth connection terminal 134 of the fire hydrant device 1 is connected to the fifth connection terminal 135 via the fourth switch terminal 122 and sixth internal wiring 156 of the manual switch 12 from the fifth internal wiring 155. The fifth connection terminal 135 is then connected to the sixth connection terminal 136 via the second switch terminal 112 and eighth internal wiring 158 of the interlocking switch 11 from the seventh internal wiring 157. The sixth connection terminal 136 is connected to the fourth connection terminal 134 of the preceding fire hydrant device 1 or the disaster prevention receiving panel 3 via the signal wiring 6, and the fourth connection terminal 134 is connected to the sixth connection terminal 136 of the next fire hydrant device 1 via the next signal wiring 6. The other terminals of the terminal block 13 are used for wiring of other components, such as the power supply for emergency lights, but they do not have to be used for wiring.

[0016] In the final stage fire hydrant device 1 shown on the far right of Figure 3, the first connection terminal 131 is connected to the fourth connection terminal 134 via the termination resistor 14. In the fire extinguishing system of this embodiment, signal wiring 5 and signal wiring 6 derived from the disaster prevention receiving panel 3 are sequentially connected to the terminals of multiple terminal blocks 13, and signal wiring 5, signal wiring 6 and internal wiring 15 are connected in series to monitor for disconnections.

[0017] Furthermore, similar to the fire hydrant system 9, in the fire hydrant system 1 of the present invention, when a fire hydrant valve (not shown) is opened in any of the fire hydrant boxes 2, the interlocking switch 11 closes, short-circuiting the two signal wires 5 and 6, eliminating the potential difference, and sending an activation signal to the disaster prevention receiving panel 3. In this embodiment, an activation signal is also sent to the disaster prevention receiving panel 3 when the manual switch 12 is operated. The disaster prevention receiving panel 3, upon receiving the activation signal, then sends an activation signal to the pump control panel 41 of the fire pump system 4, and the pump control panel 41 in the fire pump system 4 activates the pump 42, sending fire extinguishing water into the piping 7.

[0018] When all the interlocking switches 11 and the manual switch 12 are open, there is no short circuit between the signal wiring 5 and the signal wiring 6. At that time, since current flows through the termination resistor 14, a predetermined potential difference occurs between the signal wiring 5 and the signal wiring 6. When the signal wiring 5 and the signal wiring 6 are disconnected, the current stops flowing and a high potential difference occurs. Therefore, the disaster prevention receiving panel 3 can detect the disconnection of the signal wiring 5 and 6. In the present invention, further, when the internal wiring 15 is disconnected, or when the internal wiring 15 is disconnected from the terminals or connection terminals of the interlocking switch 11 and the manual switch 12, the current also stops flowing through the signal wiring 5 and 6. Therefore, the disaster prevention receiving panel 3 can also monitor the disconnection of the wiring path including the internal wiring 15.

[0019] Also, not only the monitoring of disconnection, but from the change tendency of the current value flowing through the signal wiring 5 and the signal wiring 6, etc., it is possible to diagnose (deterioration diagnosis) signs of failures such as before reaching the disconnection. For example, even if there is no disconnection of the wiring or disconnection from the terminal, when the current value flowing through the signal wiring 5 and 6 drops below the disconnection prediction threshold value, it is possible to determine the sign of disconnection assuming that the resistance value of the part where disconnection or disconnection is about to occur has increased.

[0020] Furthermore, it is also possible to diagnose (deterioration diagnosis) signs of short circuits in the wiring path and the like. For example, when the fourth internal wiring 154 is in contact with the fourth connection terminal 134 and the insulation deteriorates, there is a possibility that the pump 42 may malfunction due to a short circuit. When the current value of the wiring is larger than the short circuit prediction threshold value at the stage before the short circuit and smaller than when the activation signal is sent to the disaster prevention receiving panel 3, it can be determined as a sign of a short circuit. Note that the direct monitoring targets for monitoring obstacles such as disconnection, signs of disconnection, and signs of short circuits are not limited to the current value of the wiring, and may be a voltage value, a resistance value, etc. In the present embodiment, the disaster prevention receiving panel 3 performs the monitoring of these obstacles.

[0021] As can be seen from the conventional fire hydrant device 9 in FIG. 2 and the fire hydrant device 1 of the present invention in FIG. 3, the fire hydrant device 9 and the fire hydrant device 1 have the same configuration such as the terminal block 92 and the terminal block 13. And the wiring is different. Therefore, the terminal block 13 etc. can use the conventional ones, and by changing the internal wiring to the switch terminals and connection terminals and the connection of the signal wiring, the fire hydrant device 1 and the fire extinguishing system of the present invention can be constructed. Also, as shown in FIG. 2, if there are spare connection terminals on the terminal block in the already installed fire extinguishing system, the fire hydrant device 1 and the fire extinguishing system of the present invention can be obtained only by changing the connection to the connection terminals.

[0022] As described above, the embodiments of the present invention have been described in detail with reference to the drawings. However, the specific configuration is not limited to these embodiments, and design changes and the like within the scope not departing from the gist of the present invention are also included in the present invention. Also, each of the above-described embodiments can be combined by diverting each other's technologies as long as there are no particular contradictions or problems in their purposes and configurations.

[0023] In the above embodiment, the fire hydrant device in the tunnel has been described. Similarly, for the fire hydrant devices installed in other places, it is also possible to monitor the disconnection of the wiring etc. inside the fire hydrant device. Also, in terms of monitoring the disconnection, the sign of disconnection, and the sign of short circuit of the wiring, the terminal block of the fire hydrant device can be omitted and the signal wiring and the internal wiring can be integrated into one wiring, and the wiring from the monitoring device such as the disaster prevention receiving board can be sequentially connected to a plurality of switch terminals and connected in series to monitor obstacles such as disconnection of the wiring.

Explanation of Signs

[0024] 1 Fire hydrant device, 11 Interlocking switch, 111 First switch terminal, 112 Second switch terminal, 12 Manual switch, 121 Third switch terminal, 122 Fourth switch terminal, 13 Terminal block, 131 First connection terminal, 132 Second connection terminal, 133 Third connection terminal, 134 Fourth connection terminal, 135 Fifth connection terminal, 136 Sixth connection terminal, 14 Termination resistor, 15 Internal wiring, 151 First internal wiring, 152 Second internal wiring, 153 Third internal wiring, 154 Fourth internal wiring, 155 Fifth internal wiring, 156 Sixth internal wiring, 157 Seventh internal wiring, 158 Eighth internal wiring, 2 Fire hydrant box, 21 Fire hose storage, 3 Disaster prevention receiving panel, 4 Fire pump system, 41 Pump control panel, 42 Pump, 5 Signal wiring, 6 Signal wiring, 7 Piping, 8 Tunnel, 9 Fire hydrant device, 91 Interlocking switch, 911 First switch terminal, 912 Second switch terminal, 92 Terminal block, 921 First connection terminal, 922 Second connection terminal, 93 Termination resistor, 94 Internal wiring, 95 Internal wiring

Claims

1. A pump start switch to activate the fire hydrant pump, A terminal block having multiple terminals, and comprising, A fire hydrant system characterized by having two internal wires led out from one switch terminal of the pump start switch and connected to two terminals of the terminal block, and two other internal wires led out from the other switch terminal and connected to the other two terminals of the terminal block.

2. The pump activation switch includes a manual switch that is activated manually and an interlocking switch that is linked to the fire hydrant valve. The fire hydrant device according to claim 1, characterized in that the manual switch and the interlocking switch are connected in series between the two terminals of the terminal block by the internal wiring.

3. A fire extinguishing system comprising a plurality of fire hydrant devices according to claim 1 or 2, wherein signal wiring is sequentially connected to terminals of a plurality of terminal blocks, the signal wiring and the internal wiring are connected in series, and faults in the signal wiring and the internal wiring are monitored.

4. The fire hydrant system is equipped with multiple fire hydrant devices, each having a pump start switch to activate the fire hydrant pump. A fire extinguishing system characterized by sequentially connecting wiring to the terminals of multiple pump start switches in series, and monitoring for faults in the wiring.

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