JP6910905B2 - Tunnel disaster prevention system - Google Patents

Description

The present invention relates to a tunnel disaster prevention system that monitors an abnormality in a tunnel by connecting a terminal device such as a fire detector installed in the tunnel to a disaster prevention receiver.

Conventionally, emergency facilities have been installed in tunnels such as motorways to protect people and vehicles from fire accidents that occur in the tunnels.

Such emergency facilities include a fire detector, a manual notification device, and an emergency telephone for fire monitoring and notification, a fire hydrant device for extinguishing a fire and preventing the spread of fire, and a tunnel frame. In order to protect from fire, water spray equipment that sprinkles fire extinguishing water from the water spray head is installed, and by installing a disaster prevention receiver that monitors and controls the terminal equipment of these emergency facilities, a tunnel disaster prevention system is constructed. There is.

The tunnel disaster prevention system consisting of a disaster prevention receiver and terminal equipment is roughly divided into an R-type transmission system and a P-type direct delivery system. The R-type transmission method connects a terminal device such as a fire detector whose address is set to a transmission line, and enables individual management in which detection and control are performed for each terminal device by transmission control. In the P-type direct delivery method, a plurality of terminal devices belonging to the same section are connected to a signal line drawn out in a predetermined section unit according to the type of the terminal device, and detection and control are performed for each signal line.

Such a tunnel disaster prevention system monitors the inside of the tunnel continuously for 24 hours because it is usually not possible to close the inside of the tunnel when the inside of the tunnel is started to be monitored and the vehicle traffic starts. continue.

In addition, when it becomes impossible to monitor the inside of the tunnel due to maintenance inspection or failure of equipment in the emergency facility, it is monitored by having personnel stand in the observer passage in the tunnel to prepare for an emergency. There is also. For this reason, the disaster prevention receiver is made redundant by duplicating important main functions such as a monitoring CPU board and a partition CPU board.

Japanese Unexamined Patent Publication No. 2002-246962 Japanese Unexamined Patent Publication No. 11-128381 Japanese Unexamined Patent Publication No. 5-284648 Japanese Unexamined Patent Publication No. 2004-357423

However, in the conventional disaster prevention receiver panel in which the main functions are duplicated in this way, the power supply unit is not duplicated in consideration of aging and cost.

FIG. 5 is a block diagram showing a power supply unit provided in a conventional disaster prevention receiver. As shown in FIG. 5, the power supply system of the disaster prevention receiving panel includes a DC5V in-panel processing system, a DC12V in-panel display system, a DC24V out-of-panel transfer system, and a DC48V in-tunnel monitoring system divided into two systems. Yes, AC100 volt, which is an emergency power source, is drawn in via the power switch 100 and input to the three AC / DC converters 102-1 to 102-3 to convert AC power into DC power, which is provided for each power supply system. The DC / DC converter is input to the DC / DC converters 104-1 to 104-5 to convert the DC voltage required for each system and output it.

When a failure occurs in the power supply unit having such a configuration, it is necessary to turn off the power supply switch 100 in order to replace the failed conversion unit. When the power supply switch 100 is turned off, all the power supply systems are stopped and the tunnel Since the monitoring function inside the tunnel will be lost, it is necessary to take emergency measures such as having personnel stand in the observer passage in the tunnel to monitor.

In addition, if spare parts are delivered and managed in order to deal with the failure of the power supply unit, the spare parts will deteriorate over time as the operation period becomes longer, and even if the failed conversion part is replaced with a spare part, it will function normally. It is assumed that it will not be done.

For this reason, it is conceivable to provide a main system and a backup system for the power supply unit of the disaster prevention receiver, but the circuit scale will be doubled compared to the conventional power supply unit, and the installation space of the disaster prevention receiver will be restricted. At the same time, there is a problem in terms of cost.

In addition, if the power supply unit is duplicated, when switching to the spare system due to a failure of the main system, the spare system may not operate normally due to aging. To prevent this, in addition to the main system, the spare system There is a problem that it takes time and effort to maintain and manage the backup system because it is necessary to check the operation regularly.

The present invention enables quick temporary recovery against a failure of the power supply unit without increasing the circuit scale of the power supply unit or requiring management as a backup system, and ensures that the monitoring function in the tunnel is lost. The purpose is to provide a tunnel disaster prevention system to prevent accidents.

(Dual power supply for disaster prevention receiver)
The present invention is a tunnel disaster prevention system in which a terminal device installed in a tunnel is connected to a line drawn from a disaster prevention receiver and a signal from the terminal device is received and controlled.
In the power supply section of the disaster prevention receiver
An AC / DC converter that inputs commercial AC power, converts it to DC power of a predetermined voltage, and outputs it.
A DC / DC converter that inputs DC power output from the AC / DC converter, converts it to DC power of a predetermined voltage, and outputs it to the power supply line on the load side.
A first external connection terminal to which a first external power supply device capable of setting the DC output voltage of the AC / DC converter is detachably and externally connected, and
A second external connection terminal to which a second external power supply device capable of setting the DC output voltage of the DC / DC converter is detachably and externally connected, and
When the AC / DC converter fails, the first selector switch that switches and connects the first external connection terminal to which the first external power supply is connected to the input of the DC / DC converter, and
When the DC / DC converter fails, a second selector switch that switches and connects the second external connection terminal to which the second external power supply is connected to the power supply line on the load side of the DC / DC converter, and
Is provided.

(Multiple power supply systems)
The AC / DC conversion unit, the DC / DC conversion unit, the first changeover switch, and the second changeover switch are provided for each of a plurality of power supply systems.

(Different power supply voltage for each power supply system)
The DC / DC converter provided for each of a plurality of power supply systems outputs DC power having a DC output voltage different for each power supply system.
The second external power supply device makes it possible to variably set a plurality of DC output voltages that are different for each power supply system.

(Manual switching)
The first changeover switch manually switches the first external connection terminal to the input of the DC / DC converter and connects it.
The second changeover switch switches and connects the second external connection terminal to the power supply line on the output side of the DC / DC converter by manual operation.

(Automatic switching)
When the output voltage of the AC / DC converter is stopped and the input voltage from the first external connection terminal is detected, the first changeover switch switches the first external connection terminal to the input of the DC / DC converter. The first switching control unit to be made to
When the output voltage of the DC / DC converter is stopped and the input voltage from the second external connection terminal is detected, the second external connection terminal is switched to the power supply on the output side of the DC / DC converter by the second changeover switch. A second switching control unit that switches and connects to the line,
Is provided.

(Connector connection)
The AC / DC conversion unit and the DC / DC conversion unit are detachably provided by connecting a connector.

(Effect of duplicating the power supply of the disaster prevention receiver)
The present invention is used in a tunnel disaster prevention system in which a terminal device installed in a tunnel is connected to a line drawn from a disaster prevention receiver and a signal from the terminal device is received and controlled. , AC / DC conversion unit that inputs commercial AC power and converts it to DC power of a predetermined voltage and outputs it, and DC power output from the AC / DC conversion unit that inputs and converts it to DC power of a predetermined voltage on the load side The DC / DC conversion unit that outputs to the power supply line of the above, the first external power supply device that can set the DC output voltage of the AC / DC conversion unit are detachably externally connected, and the DC / A second external power supply device to which a second external power supply device capable of setting the DC output voltage of the DC conversion unit is detachably connected externally, and a first external power supply device when the AC / DC conversion unit fails. The first changeover switch that switches and connects the first external connection terminal to which is connected to the input of the DC / DC conversion unit and the second external power supply device are connected when the DC / DC conversion unit fails. Since the second changeover switch for switching and connecting the second external connection terminal to the power supply line on the load side of the DC / DC conversion unit is provided, for example, if the AC / DC conversion unit fails, the first external connection unit is provided. By switching the first changeover switch to the first external connection terminal side with the first external power supply externally attached to the connection terminal, the external first external power supply causes a failure in the DC / DC converter. The power supply from the AC / DC converter is backed up, the power supply is quickly temporarily restored in case of a failure of the AC / DC converter, and the failure of the AC / DC converter loses the monitoring function in the tunnel due to the power supply system. It can be minimized and the power supply unit can be substantially duplicated.

If the DC / DC converter fails, the second changeover switch can be switched to the second external connection terminal side with the second external power supply externally attached to the second external connection terminal. , The power supply to the power supply line on the load side of the failed DC / DC converter from the external second external power supply is backed up, and the power supply is quickly temporarily restored in response to the failure of the DC / DC converter, resulting in a failure. The loss of the monitoring function in the tunnel due to the power supply system by the DC / DC converter can be minimized, and the power supply unit can be substantially duplicated.

Further, since the output voltage of the first and second external power supply devices can be changed by an external operation, it is only necessary to prepare one external power supply device, and in the event of a failure of the AC / DC converter, the first and second external power supply devices can be changed. It can be externally used as the first external power supply device, and can also be externally used as the second external power supply device in the event of a failure of the DC / DC converter.

Further, the first and second external power supply devices may be always connected to each of the first and second external connection terminals. In this case, the AC / DC converter and the DC / DC converter may fail. By switching the switch, the power supply can be temporarily restored more quickly.

(Effect of multiple power supply systems)
Further, an AC / DC converter, a DC / DC converter, a first changeover switch and a second changeover switch are provided for each of a plurality of power supply systems, and a plurality of first external connection terminals and second external connection terminals are provided. Since it is commonly provided in the power supply system of, it is possible to back up the AC / DC converter and DC / DC converter of multiple systems by preparing only one first and second external power supply. The circuit scale required for duplication of parts can be significantly reduced to reduce costs.

Further, since the first or second external power supply device is externally attached to the first or second external connection terminal when the power supply unit fails, the first or second external power supply is installed in the disaster prevention receiving panel. There is no need to secure installation space for the device.

(Effect of different power supply voltage for each power supply system)
Further, the DC / DC conversion unit provided for each of the plurality of power supply systems outputs DC power having a DC output voltage different for each power supply system, and the second external power supply device outputs a plurality of DC outputs different for each power supply system. Since the voltage can be set variably, it is not necessary to prepare a second external power supply device for each of a plurality of power supply systems having different power supply voltages, and the power supply can be supplied by changing the output voltage setting of one second external power supply device. It enables backup for each of multiple power supply systems with different voltages.

(Effect of manual switching)
Further, the first changeover switch manually switches the first external connection terminal to the input of the DC / DC converter, and the second changeover switch manually operates the second external connection terminal to DC / DC / DC. Since it is switched and connected to the power line on the output side of the DC converter, the first switch is manually switched when the AC / DC converter fails, and the second switch is switched when the DC / DC converter fails. By switching the switch manually, it is possible to easily perform temporary recovery by backing up the failed power supply system.

(Effect of automatic switching)
Further, when the output voltage of the AC / DC converter is stopped and the input voltage from the first external connection terminal is detected, the first changeover switch is used to switch the first external connection terminal to the input of the DC / DC converter. When the output voltage of the first switching control unit to be switched and connected, the output voltage of the DC / DC converter is stopped, and the input voltage from the second external connection terminal is detected, the second external connection terminal is used by the second changeover switch. Is provided with a second switching control unit for switching and connecting to the power supply line on the output side of the DC / DC converter. Therefore, for example, if the AC / DC converter fails, the first external connection terminal is connected to the first. When the external power supply device is externally attached, the first changeover control unit detects the stop of the output voltage of the AC / DC converter and the input voltage from the first external connection terminal, and automatically switches the first changeover switch. It can be switched and the failed power supply system can be quickly backed up and temporarily restored.

Further, when the first external power supply device is externally attached to the first external connection terminal in advance, the first changeover control unit automatically switches the first changeover switch when the AC / DC conversion unit fails. It is possible to switch and back up the failed power supply system with a momentary interruption and quickly temporarily recover it.

If the DC / DC converter fails, the second external power supply device is externally attached to the second external connection terminal, and the second switching control unit stops the output voltage of the DC / DC converter. It is possible to detect the input voltage from the second external connection terminal and automatically switch the second changeover switch to back up the failed power supply system with a momentary interruption and quickly temporarily recover it.
The failed power supply system can be backed up and temporarily restored quickly.

Further, when the second external power supply device is externally attached to the second external connection terminal in advance, the second changeover control visual part automatically switches the second changeover switch when the DC / DC converter fails. It is possible to quickly back up the power supply of the failed power supply system and temporarily restore it.

(Effect of connector connection)
Further, since the AC / DC conversion unit and the DC / DC conversion unit are detachably provided by connecting the connectors, the AC / DC conversion unit or the DC / DC conversion unit fails and the first external power supply device or the second external power supply unit or the second With the power system that has failed due to the external external power supply of the above, it is possible to perform replacement and repair by simply removing the connector from the failed product and fitting it into the spare part.

Explanatory diagram showing the outline of the tunnel disaster prevention system Block diagram showing the board configuration of the disaster prevention receiver along with the terminal line connection Circuit block diagram showing an embodiment of a redundant power supply unit provided on a disaster prevention receiver A circuit block diagram showing another embodiment of the duplicated power supply unit provided on the disaster prevention receiver. Circuit block diagram showing the conventional power supply unit provided on the disaster prevention receiver

[Overview of tunnel disaster prevention system]
FIG. 1 is an explanatory diagram showing an outline of the tunnel disaster prevention system, and takes the P-type direct delivery method as an example. As shown in FIG. 1, an up line tunnel 1a and a down line tunnel 1b are constructed as a tunnel for a motorway, and the up line tunnel 1a and the down line tunnel 1b are connected by an evacuation connecting pit 2.

Inside the up line tunnel 1a and the down line tunnel 1b, fire detectors 16 that function as terminal devices are installed along the wall surface in the longitudinal direction of the tunnel, for example, at intervals of 50 meters. The fire detector 16 sets monitoring areas on both sides, which are 50 meters to the left and right, detects a flame caused by a fire, issues a fire, and outputs a fire detection signal.

Further, inside the up line tunnel 1a and the down line tunnel 1b, a fire hydrant device 18 and an automatic valve device 23 are installed along the wall surface of the observer passage in the longitudinal direction of the tunnel, for example, at intervals of 50 meters. The fire hydrant device 18 is provided with a manual notification device 20 and a fire hydrant switch 22 that function as terminal devices.

The fire hydrant device 18 has a hose with a nozzle housed in the fire hydrant door. In the event of a fire, the fire hydrant door is opened to pull out the hose with a nozzle, and when the fire hydrant valve open / close lever is opened, fire hydrant water is discharged and the fire hydrant valve open / close detection is detected. The switch turns on and outputs a pump start signal to start the fire extinguishing pump.

Further, the fire hydrant device 18 is provided with a fire extinguisher door, and the fire extinguisher is housed in the door. Further, the fire hydrant device 18 is provided with a water tap used by the fire brigade, and is provided with a pump start switch that outputs a pump start signal when operated by a fire brigade member. The fire hydrant valve open / close detection switch and the pump start switch are connected in parallel, and this functions as the illustrated fire hydrant switch 22.

Further, the fire hydrant device 18 is provided with a notification device door, and the notification device door is provided with a manual notification device 20 that functions as a transmitter. When the manual notification device 20 is operated, a fire notification signal is output to the disaster prevention receiving panel 10, and the response lamp is turned on by the response signal from the disaster prevention receiving panel 10.

Further, inside the up line tunnel 1a and the down line tunnel 1b, an automatic valve device 23 of a water spray facility is installed along the wall surface of the observer passage in the longitudinal direction of the tunnel, for example, at intervals of 50 meters. 23 opens and drives the main valve by remote opening control of the electric valve for operation, and discharges fire extinguishing water from a plurality of water spray heads installed in the longitudinal direction of the upper part of the tunnel wall surface to protect the tunnel frame from fire. The automatic valve device 23 of the water spraying equipment is provided with a water spray switch 24 as a terminal device for detecting the start of water spraying from the water spray head. As the water spray switch 24, a pressure switch that detects and turns on the water discharge pressure due to the opening operation of the automatic valve is used.

In order to connect terminal devices such as a fire detector 16, a manual notification device 20, a fire hydrant switch 22, and a water spray switch 24 installed in the tunnel to monitor abnormalities in the tunnel, a disaster prevention receiver 10 is installed in a monitoring center or the like. Is installed.

P-type signal line groups 11 and 12 are pulled out from the disaster prevention receiver 10 into the up line tunnel 1a and the down line tunnel 1b, and the fire detector 16, the manual notification device 20, and the fire hydrant switch installed in the tunnel. 22 and the water spray switch 24 are connected.

In the present embodiment, the inside of the tunnel is divided into, for example, two groups with a predetermined length, for example, 800 meters as one section, and individually drawn signal lines are connected to the fire detector 16 of each group. The other manual notification device 20, the fire hydrant switch 22, and the water spray switch 24 are divided into one section of 800 meters, for example, a block section of 200 meters, and are connected to a signal line drawn out in units of glock sections. In the following description, a case where the tunnel length is 1600 meters and the tunnel length is divided into two sections will be described as an example.

Here, the P-type signal line is composed of a signal line and a common line, and the fire detector 16, the manual notification device 20, the fire extinguishing plug switch 22, and the water spray switch 24 pass a line current based on their respective operations. A fire detection signal, a fire notification signal, a pump start signal, and a water spray start signal are sent to the disaster prevention receiver 10.

Further, a power supply line is pulled out from the disaster prevention receiver 10 to terminal devices such as a fire detector 16, a manual notification device 20, a fire hydrant switch 22, and a water spray switch 24 installed in the tunnel, and DC48V is supplied, for example. Has been done.

Other emergency facilities for the tunnel include fire extinguishing pump equipment 25, ventilation equipment 28, alarm display board equipment 30, radio rebroadcasting equipment 32, TV monitoring equipment 34 and lighting equipment 36, IG slave station equipment 38, and the like. Except for the point that the IG slave station equipment 38 is connected by a data transmission line, the other equipment is individually connected to the disaster prevention receiver 10 by the P-type signal line group 14.

Here, the IG slave station equipment 38 is a communication equipment that connects the disaster prevention receiving panel 10 and the remote management equipment 42 via the network 40. The ventilation equipment 28 is equipment that gives energy to the air in the tunnel by the high blowing wind speed operated by the jet fan installed on the ceiling side in the tunnel to generate a ventilation flow in the longitudinal direction of the tunnel.

In addition, the alarm display board equipment 30 is equipment that notifies the user in the tunnel of the occurrence of a fire in the tunnel, the start of water spraying, etc. by displaying it on the lightning display board. The radio rebroadcasting facility 32 is a facility for allowing a driver or the like to receive information from a road administrator in a tunnel. The TV monitoring equipment 34 is equipment for confirming the scale and position of a fire, operating a water spraying equipment, and grasping the situation in a tunnel when evacuation guidance is performed. The lighting equipment 36 is equipment for driving and managing the lighting equipment in the tunnel.

[Board configuration of disaster prevention receiver]
FIG. 2 is a block diagram showing the board configuration of the disaster prevention receiver board together with the terminal line connection. As shown in FIG. 2, the disaster prevention receiving board 10 is provided with a control rack 46 and a compartment rack 52. The control rack 46 is provided with a control CPU board 48 and a control CPU spare board 50, and the control CPU board is duplicated.

The control CPU board 48 and the control CPU spare board 50 function as a duplicated main control unit, and when a fire detection signal from the fire detector 16 or a fire notification signal from the manual notification device 20 is received, a predetermined fire alarm control is performed. When the pump start signal from the fire hydrant switch 22 is received, the start control of the fire extinguishing pump equipment 25 is performed, and when the water spray start signal from the water spray switch 24 is received, water is displayed on the alarm display board equipment 30. Controls such as warning display of prohibition of tunnel intrusion when spraying starts.

The partition rack 52 is provided with a partition CPU board 54 and a partition CPU spare board 56, and the partition CPU board is also duplicated. Further, the partition rack 52 is provided with partition boards 60-1 and 60-2 corresponding to the terminal equipment in the two sections of 800 meters of the up line tunnel 1a, and the two sections of 800 meters of the down line tunnel 1b. Two partition boards 60-3 and 60-4 are provided corresponding to the terminal devices of the above, and the terminal devices installed in the upstream tunnel 1a are provided on the partition boards 60-1 and 60-2 by the signal line group 11. The terminal devices installed in the down line tunnel 1b are connected to the partition boards 60-3 and 60-4 by the signal line group 12. Further, the partition rack 52 is provided with a P-type output board 62.

The partition CPU board 54 and the partition CPU spare board 56 function as a duplicated partition control unit, and when a line signal from a terminal device installed in a tunnel is received, a line that specifies the type of line signal and the received signal line. The number is sent to the main control unit duplicated by the control CPU board 48 and the control CPU spare board 50 to perform predetermined control.

The redundant partition CPU board 54 and the partition CPU spare board 56 are connected to the duplicated control CPU board 48 and the control CPU spare board 50 via serial transmission lines 58 and 59 such as the duplicated RS-485. ..

Further, the duplicated partition CPU board 54 and the partition CPU spare board 56 are connected to the partition boards 60-1 to 60-4 and the P-type output board 62 via a signal line. The P-type output board 62 is connected to the external fire extinguishing pump equipment 25, ventilation equipment 28, alarm display board equipment 30, radio rebroadcasting equipment 32, TV monitoring equipment 34, and lighting equipment 36 shown in FIG.

From the partition board 62-1, a P-type signal line group for the fire detector 16, the manual notification device 20, the fire hydrant switch 22, and the water spray switch 24 of the group G1 installed in the 0 to 800 m section of the up line tunnel 1a. 80-1, 82-1, 84-1, 86-1 are pulled out, the fire detector 16 is connected in line units, and the manual notification device 20, the fire hydrant switch 22 and the water spray switch 24 are connected in block units. Has been done.

From the partition board 62-1, a P-type signal line group for the fire detector 16, the manual notification device 20, the fire hydrant switch 22, and the water spray switch 24 of the group G2 installed in the 800 to 1600 m section of the up line tunnel 1a. 80-2, 82-2, 84-2, 86-2 are pulled out, the fire detector 16 is connected in line units, and the manual notification device 20, fire hydrant switch 22 and water spray switch 24 are connected in block units. Has been done.

Here, since the fire detector 16 is divided into 16 units in one section of 800 meters and the other terminal devices are divided into 4 blocks of 200 meters of 800 meters, the signal line groups 80-1 and 80-2 are respectively. The 16 lines and the signal line groups 82-1 to 86-2 each have 4 lines, and the signal line group 11 bundles 56 lines.

From the line switching board 64-2, P-type signal line groups 80-3, 82-3, 84-3, 86-3 (56 lines in total) are pulled out from the down line tunnel 1b to the down line tunnel 1b, and the fire detector 16 Is connected in line units, and the manual notification device 20, the fire hydrant switch 22, and the water spray switch 24 are connected in block units.

The compartment rack 52 is provided with a detector test board that sends a test signal through a test signal line that serves as a crossover to the fire detector 16, but the illustration is omitted.

Further, the disaster prevention receiving board 10 is provided with an operation display board 64, and an operation unit 66 having a touch panel and various operation switches and an acoustic unit 68 having a speaker are connected to the disaster prevention receiver panel 10, and a liquid crystal display is connected via the display control board 70. A display unit 72 including a display and various indicator lights is connected. Further, a serial CPU board 74 is provided on the disaster prevention receiving board 10, and the IG slave station equipment 38 shown in FIG. 1 is connected to the serial CPU board 74.

Further, the disaster prevention receiving panel 10 is provided with a power supply rack 76 and a power supply monitoring rack 78. The power supply rack 76 is provided with a power supply unit, which will be clarified later. is doing.

In FIG. 2, a power supply line 122 is pulled out from the power supply rack 76 to the up line tunnel 1a and the down line tunnel 1b as an in-tunnel monitoring system and bundled into P-type signal line groups 11 and 12, and the tunnel. A DC power of 48V DC is supplied to the fire detector 16, the manual notification device 20, the fire hydrant switch 22, and the water spray switch 24 installed inside. In addition to the in-tunnel monitoring system, the power supply rack 76 is divided into an in-panel processing system, an in-panel display system, and an out-of-panel reporting system to supply DC power of a predetermined voltage.

Further, the power supply unit provided in the power supply rack 76 is duplicated, and when the power supply unit fails, the external connector 112-for externally attaching the stabilized power supply devices 110-1 and 110-2 as shown by the imaginary line. An external AC power connector 114 for supplying an emergency power supply AC100V is provided to 1,112-2 and the stabilized power supply units 110-1 and 110-2.

The power supply monitoring rack 78 is provided with a power supply switching circuit, a voltage monitoring circuit, a storage battery circuit, and the like. Display control etc. is performed.

[Embodiment of disaster prevention receiver panel power supply unit]
FIG. 3 is a circuit block diagram showing an embodiment of a redundant power supply unit provided on the disaster prevention receiver.

As shown in FIG. 3, in the power supply unit of the present embodiment provided in the power supply rack 76, the emergency power supply AC100V is input as an AC power supply, and the AC / DC conversion unit 102 is divided into three systems via the power supply switch 100. It is supplied to -1, 102-2, 102-3.

The AC / DC conversion units 102-1, 102-2, 102-3 input AC power of AC100V, convert it to DC power of a predetermined voltage, and output it, and include a power transformer, a rectifier circuit, and a smoothing circuit. A power supply circuit is used to output DC power of, for example, 24V DC. Further, the power supply capacities of the AC / DC conversion units 102-1, 102-2, and 102-3 are set according to the maximum power required for the power supply system connected to the secondary side.

Following the AC / DC conversion units 102-1 to 102-3, DC / DC conversion units 104-1 to 104-5 are provided in five systems. The output of the AC / DC converter 102-1 is connected to the input of the DC / DC converter 104-1, but the output of the AC / DC converter 102-2 is branched into two and the DC / DC converter 104-2. , 104-3, and similarly, the output of the AC / DC converter 102-3 is also branched into two and connected to the inputs of the DC / DC converters 104-4, 104-5.

The DC / DC converter 104-1 converts the DC input power of DC60V into the DC power of DC5V required for the in-panel processing system and outputs it to the power supply line 122-1. The DC / DC converter 104-2 converts the DC input power of DC60V into the DC power of DC12V required for the in-panel display system and outputs it to the power supply line 122-2.

The DC / DC converter 104-3 converts the DC input power of DC60V into the DC power of DC24V required for the off-panel transfer system and outputs it to the power supply line 122-1. Further, the DC / DC converters 104-4 and 104-5 convert the DC input power of DC60V into the DC power of DC48V required for the monitoring system in the tunnel and output it to the power supply lines 122-4 and 122-5, respectively. ..

As such a DC / DC conversion unit 104-1-104-5, a switching power supply device or the like using an unstable converter that converts a predetermined DC input voltage into a predetermined DC output voltage according to a predetermined voltage conversion ratio is used. Can be used.

Further, the inputs and outputs of the AC / DC converters 102-1 to 102-3 and the DC / DC converters 104-1-104-5 are detachably connected to the power supply line by the connector 120, resulting in a failure. The replacement work with spare parts is easy and easy.

(Duplicate AC / DC converter)
The configuration of such a power supply unit is the same as that of the conventional example shown in FIG. 5, but in the present embodiment, in order to duplicate the power supply unit, the AC for the DC / DC converter 104-1-104-5 A manual changeover switch 106-1 to 106-5 that functions as a first changeover switch is provided on the power supply line from the / DC converters 102-1 to 102-3.

The manual changeover switches 106-1 to 106-5 have changeover terminals a and b and a common terminal c, and the connection of the changeover terminals a and b to the common terminal c is manually switched according to the changeover section. The changeover terminals a and b and the common terminal c are shown only on the manual changeover switch 106-1, but the same applies to the remaining manual changeover switches 106-2 to 106-5.

The power supply line from the AC / DC conversion unit 102-1 is connected to the changeover terminal a of the manual changeover switch 106-1, and the AC / DC conversion unit 102 is connected to the changeover terminal a of the manual changeover switches 106-2 and 106-3. The branched power supply line from -2 is connected, and the branched power supply line from the AC / DC conversion unit 102-3 is connected to the switching terminal a of the manual changeover switches 106-4 and 106-5.

The power rack 76 is provided with an external connector 112-1 that functions as a first external connection terminal, and the external connector 112-1 is in the case where any of the AC / DC conversion units 102-1 to 102-3 fails. In order to temporarily restore the power supply, a stabilized power supply device 110-1 that functions as a first external power supply device is externally connected by inserting an output plug 116, and is specified in place of the failed AC / DC converter. Supply DC power of voltage.

Further, in the vicinity of the external connector 112-1 of the partition rack 78, an external AC power connector 114 to which the emergency power supply AC100V is supplied via the power switch 100 is provided, and the stabilized power supply device 110-1 is provided here. By inserting and connecting the power plug 118, the stabilized power supply device 110-1 can be operated.

As the stabilized power supply device 110-1, a switching power supply device or the like using a commercially available stabilized converter capable of variably setting the output voltage by a setting operation can be used.

Here, since the output of the AC / DC conversion unit 102-2 is branched into two systems and input to the DC / DC conversion units 104-2 and 104-3 in common, the manual changeover switches 106-2 and 106 -3 is an interlocking switch. In this respect, the manual changeover switches 106-4 and 106-5 provided on the branch line from the AC / DC conversion unit 102-3 are also interlocking switches.

(Correspondence to failure of AC / DC converter)
If, for example, the AC / DC conversion unit 102-1 fails during the operation of the tunnel disaster prevention system, the output of the AC / DC conversion unit 102-1 is stopped, which causes the output of the DC / DC conversion unit 104-1. Is also stopped, and the power supply by the power supply line 122-1 which is the processing system in the panel is stopped.

Such a failure of the AC / DC conversion unit 102-1 is detected by the power supply monitoring function of the power supply monitoring rack 78 shown in FIG. 2, and the power supply failure is displayed on the display unit 72 by identifying the failed part. A power failure alarm sound is output from the sound unit 68. In this case, since the power supply of the in-panel processing system is stopped, the power supply to the control rack 46 is also stopped, but since the backup is performed by the storage battery circuit of the power supply monitoring rack 78, the function of the main control unit may be lost immediately. do not have.

When the failure of the AC / DC conversion unit 102-1 is notified in this way, the person in charge takes out the prepared stabilized power supply device 110-1 and inserts the power plug 116 into the external AC power connector 114 to operate. Then, after confirming that the output voltage setting of the regulated power supply device 110-1 is the same as the output voltage DC60V of the failed AC / DC converter 102-1, the external connector 112 Insert the output plug 116 into -1.

As a result, the DC power from the regulated power supply device 110-1 is supplied to the switching terminal b of the manual changeover switches 106-1 to 106-5, and the person in charge is in charge of the failed AC / DC conversion unit 102-1. The operation of switching the corresponding manual changeover switch 106-1 from the changeover terminal a to the changeover terminal b is performed.

By the changeover scanning of the manual changeover switch 106-1, the DC power from the regulated power supply device 110-1 is supplied to the DC / DC conversion unit 104-1, and the DC / DC conversion unit 104-1 is the power supply line 122-1. DC power of DC5V is supplied to the system, which temporarily restores the in-panel processing system and restores the control function of the disaster prevention receiving panel 10.

If the temporary recovery by backing up the externally attached stabilized power supply 110-1 is possible, the connector 120 of the failed AC / DC conversion unit 102-1 is pulled out and removed from the power supply rack 76, and if it fails, it fails. If the same spare parts as the AC / DC conversion unit 102-1 are prepared, the connector 120 is connected to the spare parts and arranged in the power supply rack 76.

On the other hand, if a spare part of the failed AC / DC conversion unit 102-1 is not prepared, or if the replaced spare part does not operate normally even if it is replaced with a spare part, the AC / DC A spare part of the conversion unit 102-1 is ordered from the manufacturer and waits for delivery. In this case, a certain period of time is required.

However, even if it takes time to deliver the spare parts, there is no problem in the power supply by the externally attached stabilized power supply 110-1, and it is possible to secure a sufficient margin period for the preparation of the spare parts. Become. For this reason, it is not always necessary to store spare parts, and it is possible to order spare parts in the event of a failure.

Further, the response when the AC / DC conversion unit 102-1 fails is the same as when the AC / DC conversion units 102-2 and 102-3 fail, but the stabilized power supply device 110-1 is externally attached. The difference is that the interlocking type manual changeover switches 106-2, 106-3 or the manual changeover switches 106-4, 106-5 are switched to the terminal b side in this state.

(Duplicate DC / DC converter)
As shown in FIG. 3, in the present embodiment, in addition to duplicating the AC / DC converters 102-1 to 102-3, the DC / DC converters 104-1-104-5 are duplicated, so that the DC is DC. Each of the power supply lines drawn from the output of the / DC converter 104-1-104-5 is provided with a manual changeover switch 108-1 to 108-5 that functions as a second changeover switch.

The manual changeover switches 108-1 to 108-5 are the same switches as the manual changeover switches 106-1 to 106-5, and the changeover terminal a has a power supply line from the DC / DC converter 104-1-104-5. Connected, the switching terminal b is commonly connected and connected to an external connector 112-2 that functions as a second external connection terminal.

The external connector 112-2 is a regulated power supply device that functions as a second external power supply device in order to temporarily restore the power supply when any of the DC / DC conversion units 104-1 to 104-5 fails. 110-2 is connected by inserting the output plug 116, and supplies DC power having a predetermined DC voltage required for the failed system in place of the failed DC / DC conversion unit.

Further, in the vicinity of the external connector 112-2 of the partition rack 78, an external AC power connector 114 to which the emergency power supply AC100V is supplied via the power switch 100 is provided, and the stabilized power supply device 110-2 is provided here. By inserting and connecting the power plug 118, it is possible to operate the stabilized power supply device 110-2.

The stabilized power supply 110-2 used for duplicating the DC / DC converters 104-1 to 104-5 includes power supply lines 122-1 to 122-5 from the DC / DC converters 104-1 to 104-5. It is necessary to be able to variably set the output voltage of DC5V, DC12V, DC24V and DC48V supplied by, and use a switching power supply device using a commercially available stable converter that can variably set the output voltage by the setting operation. can do.

(Correspondence to failure of DC / DC converter)
If, for example, the DC / DC converter 104-1 fails during operation in the tunnel disaster prevention system, the output of the DC / DC converter 104-1 is stopped, and as a result, the power supply line 122-, which is an in-panel processing system, is stopped. The power supply by 1 is stopped, and the failure of the DC / DC converter 104-1 is notified.

In this case, the person in charge takes out the stabilized power supply 110-2 prepared in advance and inserts the power plug 116 into the external AC power connector 114 to put it into an operating state, and subsequently, the regulated power supply 110-2 fails. After confirming that the output setting is the same as the DC / DC converter 104-1 and the output voltage DC5V, insert the output plug 116 into the external connector 112-2.

As a result, the DC power from the regulated power supply device 110-2 is supplied to the switching terminal b of the manual changeover switches 108-1 to 108-5, and the person in charge is in charge of the failed AC / DC conversion unit 102-1. The operation of switching the corresponding manual changeover switch 108-1 from the changeover terminal a to the changeover terminal b is performed.

By the switching operation of the manual changeover switch 108-1, the DC power from the regulated power supply device 110-2 is supplied to the power supply line 122-1, whereby the power supply of the in-panel processing system is temporarily restored and disaster prevention reception is performed. The control function of the board 10 is restored.

If the temporary recovery by backing up the externally attached stabilized power supply 110-2 is completed in this way, the connector 120 of the failed DC / DC converter 104-1 is pulled out and removed from the power supply rack 76, and the failed DC / DC / The connector 120 is connected to the same spare part as the DC converter 104-1 and arranged in the power supply rack 76.

Even if any of the DC / DC converters 104-2 to 102-5 fails, the output voltage of the external regulated power supply 110-2 is set to correspond to each failure system, except that it is set. The response is the same as when the DC / DC converter 104-1 fails.

[Other Embodiments of Disaster Prevention Receiver Power Supply Unit]
FIG. 4 is a circuit block diagram showing another embodiment of the duplicated power supply unit provided in the disaster prevention receiver, and is characterized in that a failure of the power supply unit is detected and the backup state is automatically switched to. And.

As shown in FIG. 4, in the present embodiment, a switching control unit 130 (first switching control unit) is provided in order to monitor a failure of the AC / DC conversion units 102-1 to 102-3. Further, a switching control unit 140 (second switching control unit) is provided to monitor the failure of the DC / DC converter units 104-1 to 104-5.

Further, the manual changeover switches 106-1 to 106-5 shown in FIG. 3 are switch circuits 132-1 to 132-3 in which terminals a and b are switched by a changeover control signal from the outside, and among them, AC / Since the output line of the DC conversion unit 102-2 is branched and input to the DC / DC conversion units 104-2 and 104-3, the switch circuit unit 132-2 has two circuits, and similarly, the AC / DC The switch circuit unit 132-3 provided on the branched output line of the conversion unit 102-3 also has two circuits.

Further, the manual changeover switches 108-1 to 108-5 shown in FIG. 3 are switch circuits 142-1 to 142-5 in which terminals a and b are switched by a changeover control signal from the outside.

The output voltage of the AC / DC conversion units 102-1 to 102-3 and the output voltage of the regulated power supply 110-1 externally attached to the external connector 112-1 are input to the switching control unit 130, and the AC AC / DC whose output voltage has stopped when the stop of the output voltage of any of the / DC converters 102-1 to 102-3 is detected and the output voltage of the regulated power supply 110-1 is detected. A switching control signal is output to the switch circuit unit provided in the power supply line from the conversion unit, and control is performed by switching from the switching terminal a to the switching terminal b for temporary recovery.

The output voltage of the DC / DC converter 104-1 to 104-5 and the output voltage of the regulated power supply 110-2 externally attached to the external connector 112-2 are input to the switching control unit 140, and DC. When the stop of the output voltage of any of the / DC converters 104-1 to 104-5 is detected and the output voltage of the regulated power supply 110-2 is detected, the output voltage is stopped DC / DC. A switching control signal is output to the switch circuit unit provided in the power supply line from the conversion unit, and control is performed by switching from the switching terminal a to the switching terminal b for temporary recovery.

In order to detect a failure by voltage monitoring of the switching control units 130 and 140 and perform control for automatic temporary recovery in this way, the external power supply devices 100-1 and 112-2 are connected to the external connectors 112-1 and 112-2. It is desirable to keep 100-2 external at all times.

Further, when any failure of the AC / DC conversion units 102-1 to 102-3 is notified, the regulated power supply device 110-1 is externally attached to the external connector 112-1 to supply DC power for switching. The control unit 130 can detect the output voltage of the regulated power supply device 110-1 and switch the switch circuit unit corresponding to the failure location to automatically temporarily restore the power supply.

Similarly, when any failure of the DC / DC converters 104-1 to 104-5 is notified, a regulated power supply 110-2 is externally attached to the external connector 112-2 to supply DC power. Then, the switching control unit 140 can detect the output voltage of the regulated power supply device 110-2 and switch the switch circuit unit corresponding to the faulty part to automatically temporarily restore the power supply.

[Modification of the present invention]
(R-type transmission method)
In the above embodiment, the power supply unit of the disaster prevention receiver in the P-type direct delivery type tunnel disaster prevention system is taken as an example. However, a terminal device such as a fire detector whose address is set is connected to the transmission line, and the terminal device is controlled by transmission. Regarding the power supply unit of the disaster prevention receiver in the R-type transmission type tunnel disaster prevention system that enables individual management of detection and control in units, the same power supply unit as in the above-described embodiment may be duplicated.

(External operation of external power supply)
In the above embodiment, the power plug of the external power supply device is connected to the external AC power connector provided in the power rack to supply DC power for temporary restoration. However, as an external AC power connector, A connector with a power switch may be used, and the external power supply device may be started and stopped by operating the power switch provided on the external AC power connector. If the power supply unit breaks down due to this, after the external power supply is completed, the external power supply can be started and temporarily restored, and it is necessary to start and stop the external power supply. It can be done easily according to the situation.

(Terminal device)
In the above embodiment, a fire detector, a manual notification device, a fire hydrant switch, and a water spray switch are taken as examples of terminal devices connected to the partition board by a signal line, but the present invention is not limited to this, and is related to a fire. It can also be applied to the case where the operation of the appropriate terminal device to be operated, for example, the emergency telephone notification operation, the removal of the fire extinguisher, etc., is connected to the partition board as the terminal device.

(Fire alarm receiver)
The above embodiment takes the disaster prevention receiver of the tunnel disaster prevention system as an example, but is not limited to this, and reliably prevents the monitoring function from being lost, for example, a fire alarm receiver. The configuration of the power supply unit according to the present invention can also be applied to other systems that need to be supplied with power for each system.

(others)
In addition, the present invention includes appropriate modifications that do not impair its purpose and advantages, and is not further limited by the numerical values shown in the above embodiments.

1a: Up line tunnel 1b: Down line tunnel 10: Disaster prevention receiver 11, 12, 14: Signal line group 16: Fire detector 18: Fire extinguisher device 20: Manual notification device 22: Fire extinguishing switch 23: Automatic valve device 24: Water Spray switch 25: Fire extinguishing pump equipment 28: Ventilation equipment 30: Alarm display board equipment 32: Radio rebroadcast equipment 34: TV monitoring equipment 36: Lighting equipment 38: IG slave station equipment 40: Network 42: Remote management equipment 46: Control rack 48: Control CPU board 50: Control CPU spare board 52: Partition rack 54: Partition CPU board 56: Partition CPU spare board 60-1 to 60-4: Partition board 62: P-type output board 64: Operation display CPU board 66: Operation unit 68: Acoustic unit 70: Display control board 72: Display unit 74: Serial CPU board 76: Power supply rack 78: Power supply monitoring rack 80-1 to 86-4: Signal line group 100: Power supply switch 102-1-102- 3: AC / DC conversion unit 104-1-104-5: DC / DC conversion unit 106-1 to 106-3, 108-1 to 108-5: Manual changeover switch 110-1, 110-2: Stabilized power supply Devices 112-1, 112-2: External connector 114: External AC power supply Nectar 116: Output plug 118: Power plug 120: Connector 122-1 to 122-5: Power supply line 130, 140: Switching control unit 132-1 to 132 -3,142-1 to 142-5: Switch circuit section

Claims (6)

In a tunnel disaster prevention system in which a terminal device installed in a tunnel is connected to a line drawn from a disaster prevention receiver and a signal from the terminal device is received and controlled on a line-by-line basis.
In the power supply section of the disaster prevention receiver
An AC / DC converter that inputs commercial AC power, converts it to DC power of a predetermined voltage, and outputs it.
A DC / DC converter that inputs DC power output from the AC / DC converter, converts it to DC power of a predetermined voltage, and outputs it to the power supply line on the load side.
A first external power supply device (a first external connection terminal to which the DC output voltage of the AC / DC conversion unit can be set is detachably and externally connected) and
A second external power supply device (a second external connection terminal to which the DC output voltage of the DC / DC converter can be set is detachably and externally connected) and
When the AC / DC conversion unit fails, a first changeover switch for switching and connecting the first external connection terminal to which the first external power supply device is connected to the input of the DC / DC conversion unit, and
When the DC / DC converter fails, the second external connection terminal to which the second external power supply device is connected is switched and connected to the load side power supply line of the DC / DC converter. Changeover switch and
A tunnel disaster prevention system characterized by the establishment of.
In the tunnel disaster prevention system according to claim 1,
A tunnel disaster prevention system characterized in that the AC / DC conversion unit, the DC / DC conversion unit, the first changeover switch, and the second changeover switch are provided for each of a plurality of power supply systems.
In the tunnel disaster prevention system according to claim 2.
The DC / DC converter provided for each of the plurality of power supply systems outputs DC power having a DC output voltage different for each power supply system.
The second external power supply device is a tunnel disaster prevention system characterized in that a plurality of DC output voltages that are different for each power supply system can be variably set.
In the tunnel disaster prevention system according to claim 1,
The first changeover switch is manually operated to switch and connect the first external connection terminal to the input of the DC / DC converter.
The second changeover switch is a tunnel disaster prevention system characterized in that the second external connection terminal is switched and connected to the power supply line on the output side of the DC / DC converter by a manual operation.
In the tunnel disaster prevention system according to claim 1, further
When the output voltage of the AC / DC converter is stopped and the input voltage from the first external connection terminal is detected, the first changeover switch is used to connect the first external connection terminal to the DC / DC converter. The first switching control unit that switches and connects to the input,
When the output voltage of the DC / DC converter is stopped and the input voltage from the second external connection terminal is detected, the second changeover switch is used to switch the second external connection terminal to the DC / DC converter. A second switching control unit that switches and connects to the power supply line on the output side of
A tunnel disaster prevention system characterized by the establishment of.
In the tunnel disaster prevention system according to claim 1,
A tunnel disaster prevention system characterized in that the AC / DC conversion unit and the DC / DC conversion unit are detachably provided by connecting a connector.

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