JP7444411B2 - water supply system - Google Patents

Description

The present invention relates to a water supply system suitable for large-scale fires such as tank fires in petroleum complexes, or for injection of cooling water into nuclear reactors at nuclear power plants.

Japanese Patent No. 5,695,790 discloses a large-capacity water supply system that continuously supplies a large amount of water without interruption. This large-capacity water delivery system includes a large-capacity water delivery vehicle, a fuel storage tank, and an automatic supply pump mechanism. The large capacity water vehicle receives an automatic supply of fuel from a fuel storage tank via an automatic supply pump mechanism. This allows the large-capacity water transport vehicle to continuously transport a large amount of water without interruption.

Patent No. 5695790

<Signal cable>
Conventional large-capacity water delivery systems control automatic supply pump mechanisms on and off based on fuel level signals transmitted from large-capacity water delivery vehicles. Such a control method requires electrical connection between the large capacity water delivery vehicle and the automatic supply pump mechanism by a signal cable for transmitting and receiving fuel level signals. Signal cables are routed above the ground near the fire scene and are exposed to fire, water, and high temperatures. For this reason, conventional large-capacity water supply systems are highly likely to suffer failures such as damage to signal cables, disconnections, or ground faults.

<Application to multiple large-capacity water transportation vehicles>
A conventional large-capacity water supply system has a configuration in which a large-capacity water supply vehicle and an automatic supply pump mechanism correspond on a 1:1 basis. In other words, conventional large-capacity water delivery systems cannot automatically supply fuel to multiple large-capacity water delivery vehicles. If a conventional large-capacity water conveyance system were to be applied to a plurality of large-capacity water conveyance vehicles, a plurality of automatic supply pump mechanisms corresponding to each large-capacity water conveyance system would be required. Furthermore, conventional large-capacity water delivery systems require a 1:1 connection between the large-capacity water delivery vehicle and the automatic supply pump mechanism through signal cables and oil delivery hoses. Therefore, if the signal cables and oil supply hoses are incorrectly connected between the plurality of large-capacity water supply vehicles and the plurality of automatic supply pump mechanisms, automatic fuel supply cannot be performed correctly.

<Foam water spray>
Conventional large-capacity water supply systems have been designed to continuously supply large amounts of water without interruption. However, even if large amounts of water are released continuously without interruption, large-scale fires such as tank fires at oil complexes cannot be extinguished efficiently and quickly. In order to extinguish large-scale fires, spraying foam using a mixture of fire extinguishing water and fire extinguishing solution (foam fire extinguishing agent) is effective. Conventional large-capacity water supply systems are capable of continuously supplying fire extinguishing water without interruption, but cannot continuously supply fire extinguishing solution without interruption. In other words, conventional large-capacity water supply systems cannot achieve continuous foam water discharge over a long period of time.

<Purpose of the invention>
The present invention aims to provide a water supply system that achieves the following.
・Automatically supply liquid to fire extinguishing equipment in operation without monitoring the status of the fire extinguishing equipment ・Automatically supply liquid to multiple fire extinguishing equipment in operation using an extremely simple control method ・Over a long period of time To enable continuous foam water discharge

(1) In order to achieve the above object, the water supply system of the present invention includes (a) a water intake pump, a water intake drive source for driving the water intake pump, and a storage tank for storing fuel for the engine of the water intake drive source. A vehicle equipped with a pump system including a replenishment tank, a level sensor that detects the level of fuel stored in the replenishment tank, and a water supply pump that discharges water sucked into the water intake pump, (b) the pump system and (c) a separately provided fuel storage tank; (c) a fuel storage tank provided between the fuel storage tank and the vehicle, which opens and closes a valve in a fuel supply line based on a signal from the level sensor; A refueling system is provided that automatically supplies and stops the supply of fuel in the tank to the tank to be refilled.

(2) Preferably, in the water supply system of (1) above, the valve of the fuel supply conduit is provided in the pump system.

(3) Preferably, in the water supply system according to (1) or (2) above, when the fuel stored in the replenishment tank becomes lower than a preset level, the valve of the fuel supply pipe is activated. is opened, the pressure in the line becomes lower than the preset pressure, and fuel supply begins.

(4) Preferably, in the water supply system according to (1) or (2) above, when the fuel stored in the replenishment tank becomes higher than a preset level, the valve of the fuel supply pipe is activated. is closed, the pressure in the line becomes higher than the preset pressure, and the fuel supply is stopped.

(5) Preferably, in the water supply system of (3) or (4) above, the pressure in the conduit is detected by a pressure sensor.

(6) Preferably, in the water supply system of (3) or (4) above, when the pressure in the pipe line does not become higher than a preset pressure even after a predetermined period of time has elapsed from the start of supply of the fuel. , a second fuel supply stop method is adopted in which the supply of fuel from the fuel storage tank to the replenishment tank is stopped.

(7) Preferably, in the water supply system according to any one of (1) to (6) above, the pump system includes a water supply pump that discharges water sucked into the water intake pump, and a water supply pump that drives the water supply pump. It further includes a water supply driving source.

(8) Preferably, the water supply system according to any one of (1) to (7) above includes one fuel replenishment system and a plurality of the pump systems, and a plurality of the fuel replenishment systems from one fuel storage tank. Automatically supplies and stops fuel to the tank.

(9) Preferably, the water supply system according to any one of (1) to (8) above includes a water discharge system including a fuel tank, a drive source, and a water discharge pump, and supplies fuel from the fuel replenishment system to the fuel tank. and stop automatically.

(10) Preferably, in the water supply system according to any one of (1) to (9) above, the water intake pump is configured to be able to be put into water, is put into unlimited water use, and sucks water for fire extinguishing. do.

The water supply system of the present invention makes it possible to automatically supply liquid to fire extinguishing equipment in operation without monitoring the status of the fire extinguishing equipment. Further, the water supply system of the present invention makes it possible to automatically supply liquid to a plurality of fire extinguishing equipment in operation using an extremely simple control method. Furthermore, the water supply system of the present invention enables continuous foam water discharge over a long period of time.

FIG. 1 is a schematic diagram showing the entire fire extinguishing system including a water supply system according to an embodiment of the present invention. FIG. 2 is a circuit diagram showing the entire fire extinguishing system. FIG. 3 is a schematic diagram showing a first embodiment of the fire extinguishing system. FIG. 4 is a schematic diagram showing a second embodiment of the fire extinguishing system. FIG. 5 is a schematic diagram showing a third embodiment of the fire extinguishing system.

Hereinafter, a fire extinguishing system including a water supply system according to an embodiment of the present invention will be described with reference to the drawings.

<Summary of fire extinguishing system>
As shown in FIG. 1, the fire extinguishing system 1 of this embodiment includes a fuel replenishment system 10, a fire extinguishing solution replenishment system 20, a pump system 30, a mixing system 40, and a water discharge system 50. An overview of each of the systems 10 to 50 constituting the fire extinguishing system 1 will be described below with reference to FIG. 1. Note that solid arrows in FIG. 1 indicate the flow of liquid. The dotted lines in FIG. 1 indicate the flow of something other than liquid, such as electric power or hydraulic pressure.

- Outline of fuel supply system The fuel supply system 10 is a fuel supply unit, and automatically supplies fuel to other systems 20 to 50 in operation. The fuel supplied by the refueling system 10 is, for example, liquid fuel such as light oil or gasoline. The refueling system 10 mainly includes a fuel storage tank 11, a fuel tank 12, a drive source 13, and a pump 14.

The fuel storage tank 11 has a large capacity that can store enough fuel to operate the fire extinguishing system 1 for, for example, several days to about a week. Preferably, the fuel storage tank 11 is installed in an underground space that is not affected by fires, tsunamis, tornadoes, and the like. Refueling to the fuel storage tank 11 is performed by, for example, a tank truck 101. Therefore, as long as road traffic is not interrupted, the fuel in the fuel storage tank 11 is replenished by the tank truck 101, and no fuel shortage occurs.

The fuel tank 12 is connected to the fuel storage tank 11 and receives fuel from the fuel storage tank 11 . The fuel stored in the fuel tank 12 is used to operate the drive source 13 of the pump 14. Note that the fuel supply from the fuel storage tank 11 to the fuel tank 12 may be performed automatically by a method described later, or may be performed manually by an operator.

For example, if the drive source 13 is electric, it includes an engine E, a generator G, and a motor M (see FIG. 2). The engine E is driven by consuming fuel from the fuel tank 12, and rotates the generator G. Electric power generated by the generator G is supplied to the motor M. Motor M drives pump 14. Note that the drive source 13 may be hydraulic. The hydraulic drive source 13 includes an engine E and a hydraulic pump (not shown). The engine E rotates the hydraulic pump, and thereby the hydraulic pump generates oil pressure for driving the pump 14. The type of engine E may be either a diesel engine or a gasoline engine, but a diesel engine suitable for driving a generator or a pump is preferable.

As the pump 14, for example, a centrifugal pump that is efficient over a wide flow rate range may be used. The pump 14 is connected to the fuel storage tank 11, and sucks in and discharges the fuel stored in the fuel storage tank 11. The fuel discharged by the pump 14 is supplied to other operating systems 20-50. The operation of the pump 14 is controlled by a first control section 16 (see FIG. 2), which will be described later. Here, the refueling system 10 of this embodiment includes a plurality of first connection parts 15d (see FIG. 2) that are outlets for the fuel discharged by the pump 14. Other systems 20 to 50 that receive automatic supply of fuel from the refueling system 10 are all connected to the first connection portion 15d. Note that a system similar to the other systems 20 to 50 may be connected to the remaining first connection portion 15d to which the other systems 20 to 50 are not connected.

- Outline of the fire extinguishing liquid supply system The fire extinguishing liquid supply system 20 is a supply unit that automatically supplies the fire extinguishing liquid to the mixing system 40. On the other hand, the fire extinguishing liquid replenishment system 20 is also a fire extinguishing equipment to which fuel is automatically supplied from the fuel replenishment system 10. The fire extinguishing fluid supplied by the fire extinguishing fluid supply system 20 is, for example, a foam fire extinguishing agent for a large-capacity foam water cannon, a protein foam fire extinguishing agent, a synthetic surfactant foam fire extinguishing agent, a water-forming foam fire extinguishing agent, and the like. The fire extinguishing stock solution is mixed with fire extinguishing water by the mixing system 40 to form a foam fire extinguishing agent diluted to a predetermined concentration. The fire extinguishing solution replenishment system 20 mainly includes a fire extinguishing solution storage tank 21 , a fuel tank 22 , a drive source 23 , and a pump 24 .

The fire extinguishing solution storage tank 21 has a large capacity capable of storing an amount of fire extinguishing solution sufficient to perform fire extinguishing activities by spraying foam for a period of several days to about one week. Preferably, the fire extinguishing solution storage tank 21 is installed in an underground space that is not affected by fires, tsunamis, tornadoes, and the like. Refueling to the fire extinguishing stock tank 21 is performed by, for example, the tank truck 102. Therefore, as long as road traffic is not blocked, the fire extinguishing solution in the fire extinguishing solution storage tank 21 is replenished by the tank truck 102, and there will be no shortage of the fire extinguishing solution.

The fuel tank (tank to be refilled) 22 is connected to the refueling system 10, and the fuel in the fuel storage tank 11 is automatically supplied. The fuel stored in the fuel tank 22 is used to operate the drive source 23 of the pump 24.

For example, if the drive source 23 is electric, it includes an engine E, a generator G, and a motor M (see FIG. 2). The engine E is driven by consuming fuel from the fuel tank 22, and rotates the generator G. Electric power generated by the generator G is supplied to the motor M. Motor M drives pump 24. Note that the drive source 23 may be hydraulic. The hydraulic drive source 23 includes an engine E and a hydraulic pump (not shown). The engine E rotates the hydraulic pump, and thereby the hydraulic pump generates oil pressure for driving the pump 24. The type of engine E may be either a diesel engine or a gasoline engine, but a diesel engine suitable for driving a generator or a pump is preferable.

The pump 24 is connected to the fire extinguishing solution storage tank 21, and sucks and discharges the fire extinguishing solution stored in the fire extinguishing solution storage tank 21. The extinguishing stock solution discharged by the pump 24 is supplied to the mixing system 40 in operation. The operation of the pump 24 is controlled by a first control section 26 (see FIG. 2), which will be described later. Here, the fire extinguishing liquid replenishment system 20 of the present embodiment includes a plurality of first connecting portions 25d (see FIG. 2) that are outlets for the fire extinguishing liquid discharged by the pump 24. The mixing system 40 is connected to one of the plurality of first connections 25d. Note that another mixing system (not shown) may be connected to the remaining first connection portion 25d to which the mixing system 40 is not connected.

- Outline of Pump System The pump system 30 is a fire extinguishing equipment to which fuel is automatically supplied from the fuel supply system 10. Pump system 30 supplies fire extinguishing water to mixing system 40 . The pump system 30 mainly includes a fuel tank 32 , a water supply drive source 33 , a water supply pump 34 , a water intake drive source 35 , and a water intake pump 36 . Here, the pump system 30 may be a portable equipment mounted on a vehicle (see FIGS. 3 to 5), or a fixed equipment installed on land or a building.

The fuel tank (tank to be refilled) 32 is connected to the refueling system 10, and the fuel in the fuel storage tank 11 is automatically supplied. The fuel stored in the fuel tank 32 is used to operate the water supply drive source 33 and the water intake drive source 35. If pump system 30 is a portable device (see FIGS. 3-5), fuel tank 32 may be a fuel tank for supplying fuel to a vehicle engine.

For example, if the water supply drive source 33 and the water intake drive source 35 are electric, they include an engine E, a generator G, and a motor M (see FIG. 2). The engine E is driven by consuming fuel from the fuel tank 32, and rotates the generator G. Electric power generated by the generator G is supplied to the motor M. The motor M drives the water supply pump 34 or the water intake pump 36. Note that the water supply drive source 33 and the water intake drive source 35 may be hydraulic. The hydraulic water supply drive source 33 and water intake drive source 35 include an engine E and a hydraulic pump (not shown). The engine E rotates the hydraulic pump, and thereby the hydraulic pump generates oil pressure for driving the water supply pump 34 or the water intake pump 36. The type of engine E may be either a diesel engine or a gasoline engine, but a diesel engine suitable for driving a generator or a pump is preferable. Further, when the pump system 30 is a portable equipment (see FIGS. 3 to 5), the engine E of at least one of the water supply drive source 33 and the water intake drive source 35 may be a vehicle engine. Furthermore, the water supply drive source 33 and the water intake drive source 35 may be used as one drive source, and this one drive source may be configured to drive both the water supply pump 34 and the water intake pump 36.

Water pump 34 and water intake pump 36 supply firefighting water to mixing system 40 . Among these, the water intake pump 36 is configured to be able to be put into water. The water intake pump 36 is inserted into an infinite water source, such as the sea or a river, and sucks fire extinguishing water. The water pump 34 discharges the fire extinguishing water sucked into the water intake pump 36 to the mixing system 40 .

- Overview of Mixing System The mixing system 40 is a fire extinguishing equipment to which fuel is automatically supplied from the fuel supply system 10. The mixing system 40 mixes the fire extinguishing solution and the fire extinguishing water at a predetermined ratio to produce a foam fire extinguishing agent diluted to a predetermined concentration. The mixing system 40 mainly includes a fire extinguishing solution tank 41, a fuel tank 42, a drive source 43, a pump 44, and a mixer 45. Here, the mixing system 40 may be a portable equipment mounted on a vehicle (see FIGS. 3 to 5), or a fixed equipment installed on land or a building.

The fire extinguishing liquid tank 41 is connected to the fire extinguishing liquid supply system 20, and the fire extinguishing liquid in the fire extinguishing liquid storage tank 21 is automatically supplied. The fire extinguishing solution stored in the fire extinguishing solution tank 41 is sucked into the mixer 45 .

The fuel tank (tank to be refilled) 42 is connected to the refueling system 10, and the fuel in the fuel storage tank 11 is automatically supplied. The fuel stored in the fuel tank 42 is used to operate the drive source 43. If the mixing system 40 is a portable device (see FIGS. 3-5), the fuel tank 42 may be a fuel tank for supplying fuel to a vehicle engine.

For example, if the drive source 43 is electric, it includes an engine E, a generator G, and a motor M (see FIG. 2). The engine E is driven by consuming fuel from the fuel tank 42, and rotates the generator G. Electric power generated by the generator G is supplied to the motor M. Motor M drives pump 44. Note that the drive source 43 may be hydraulic. The hydraulic drive source 43 includes an engine E and a hydraulic pump (not shown). The engine E rotates the hydraulic pump, and thereby the hydraulic pump generates oil pressure for driving the pump 44. The type of engine E may be either a diesel engine or a gasoline engine, but a diesel engine suitable for driving a generator or a pump is preferable.

Pump 44 is connected to pump system 30 , sucks fire extinguishing water supplied from water pump 34 , and discharges it to mixer 45 .

Mixer 45 is connected to fire extinguishing liquid tank 41 and pump 44 . The mixer 45 mixes the fire extinguishing solution stored in the fire extinguishing solution tank 41 and the fire extinguishing water supplied from the pump 44 at a predetermined ratio to produce a foam fire extinguishing agent diluted to a predetermined concentration. This foam extinguishing agent is supplied to the water spray system 50.

Here, the mixer 45 includes, for example, a vane pump and a piston pump (not shown). The vane pump inlet is connected to pump 44 . The vane pump is rotated by the flow of fire extinguishing water supplied from the pump 44. On the other hand, the piston pump is driven by the rotation of the vane pump. The inlet of the piston pump is connected to the fire extinguishing liquid tank 41. The outlet of the piston pump is connected to the outlet of the vane pump. With such a configuration, the piston pump supplies an amount of fire extinguishing stock solution to the outlet of the vane pump in accordance with the inflow amount of fire extinguishing water. As a result, the fire extinguishing water and the fire extinguishing stock solution are mixed at a predetermined ratio. The fire extinguishing foam produced by the mixer 45 is supplied to a water spray system 50 . Note that the mixer composed of a vane pump and a piston pump is described in detail in Japanese Patent Application No. 2016-51216 of Japan Dry Chemical Co., Ltd., one of the co-applicants. Further, the mixer 45 of the mixing system 40 may be configured to operate by water supplied from the water pump 34 of the pump system 30. With such a configuration, the fuel tank 42, drive source 43, and pump 44 can be omitted from the mixing system 40.

- Outline of water spray system The water spray system 50 is a fire extinguishing equipment to which fuel is automatically supplied from the fuel supply system 10. The water discharge system 50 discharges the fire extinguishing foam supplied from the mixing system 40 to the outside. The water discharge system 50 mainly includes a fuel tank 52, a drive source 53, and a water discharge pump 54. Further, the water spray system 50 may be configured to include, for example, a foaming nozzle as a foaming device for foaming the foam fire extinguishing agent. Here, the water discharging system 50 may be a portable equipment mounted on a vehicle (see FIGS. 3 to 5), or a fixed equipment installed on land or a building.

The fuel tank (tank to be refilled) 52 is connected to the refueling system 10, and the fuel in the fuel storage tank 11 is automatically supplied. The fuel stored in the fuel tank 52 is used to operate the drive source 53. If the water spray system 50 is a portable device (see FIGS. 3-5), the fuel tank 52 may be a fuel tank for supplying fuel to a vehicle engine.

For example, if the drive source 53 is electric, it includes an engine E, a generator G, and a motor M (see FIG. 2). The engine E is driven by consuming fuel from the fuel tank 52, and rotates the generator G. Electric power generated by the generator G is supplied to the motor M. The motor M drives the water discharge pump 54. Note that the drive source 53 may be hydraulic. The hydraulic drive source 53 includes an engine E and a hydraulic pump (not shown). The engine E rotates the hydraulic pump, and thereby the hydraulic pump generates hydraulic pressure for driving the water discharge pump 54. The type of engine E may be either a diesel engine or a gasoline engine, but a diesel engine suitable for driving a generator or a pump is preferable.

Water pump 54 is connected to mixing system 40 . The water pump 54 sucks the foam fire extinguishing agent supplied from the mixer 45 and discharges it to the outside through a foam nozzle or the like. Note that the water spray system 50 may be omitted from the fire extinguishing system 1 and the foam extinguishing agent may be directly discharged to the outside from a foam nozzle or the like connected to the mixer 45 of the mixing system 40.

<Fire extinguishing system circuit and control>
Next, the circuits and controls of the fuel replenishment system 10, fire extinguishing solution replenishment system 20, pump system 30, mixing system 40, and water discharge system 50 that constitute the above-described fire extinguishing system 1 will be described in detail with reference to FIG. 2. Note that solid line arrows in FIG. 2 indicate the flow of liquid. Dotted lines in FIG. 1 indicate flows other than liquids, such as electric power, signals, or hydraulic pressure.

- Circuit of Refueling System In FIG. 2, the fuel storage tank 11, fuel tank 12, and pump 14 included in the refueling system 10 have already been described with reference to FIG. Further, the engine E, the generator G, and the motor M included in the refueling system 10 in FIG. 2 correspond to the drive source 13 in FIG. 1.

Both the primary side and the secondary side of the pump 14 are connected to the fuel storage tank 11 via a pipe line. A pressure control valve 14a is provided in a conduit connected to the secondary side of the pump 14. Furthermore, the primary side of the first pipeline 15 is connected to the pipeline connected to the secondary side of the pump 14 . The secondary side of the first conduit 15 is branched into a plurality of branches, and each branched end is provided with a first connection part 15d via a valve. The plurality of first connection parts 15d are, for example, hose connection headers provided with a plurality of connection fittings.

The fuel stored in the fuel storage tank 11 is sucked into the pump 14 and flows through the first pipe line 15 to the plurality of first connection parts 15d. On the other hand, when the discharge pressure of the pump 14 exceeds a preset constant pressure, the pressure control valve 14a is in an open state. Thereby, the fuel discharged from the pump 14 is returned to the fuel storage tank 11 again. As a result, the pressure on the primary side of the first pipe line 15 (the primary side of the first orifice 15a described below) is kept constant, and fuel is discharged into the first pipe line 15 within an appropriate flow rate range. Become.

The first conduit 15 is provided with a first orifice 15a, a first valve 15b, and a pressure sensor 15c. The first valve 15b is located on the primary side of the first conduit 15. The first valve 15b allows or stops the flow of fuel into the first pipe line 15. The first orifice 15a is located on the secondary side of the first valve 15b in the first conduit 15. The first orifice 15a has a circular hole with a smaller diameter than the inner diameter of the first conduit 15. The first orifice 15a controls the flow rate and pressure of fuel flowing within the first pipe line 15.

The pressure sensor 15c detects the pressure on the secondary side of the first orifice 15a in the first conduit 15 and transmits a signal. Two types of pressures P1 and P2 are set in the pressure sensor 15c of this embodiment. The pressure P1 indicates the upper limit, and the pressure P2 indicates the lower limit, with a relationship of P1>P2. The pressure sensor 15c transmits a signal H when it detects a pressure equal to or higher than the pressure P1, and transmits a signal L when it detects a pressure equal to or lower than the pressure P2.

The first control unit 16 is electrically connected to each of the level sensor 11a, the motor M of the pump 14, the first valve 15b, the pressure sensor 15c, and the plurality of timers TM. The first control unit 16 controls the pump 14 and the first valve 15b based on signals from the level sensor 11a, the pressure sensor 15c, and the plurality of timers TM. That is, the automatic supply of fuel by the refueling system 10 is realized under the control of the first control section 16. The control of the refueling system 10 by the first control section 16 will be described below.

・Refueling system control (fuel supply)
The first control unit 16 immediately drives the motor M of the pump 14 based on the signal L from the pressure sensor 15c, and then opens the first valve 15b. Thereby, fuel supply from the fuel storage tank 11 to the plurality of first connection parts 15d is started.

Here, the refueling system 10 of this embodiment measures a predetermined time T from the time when the signal L is received using one timer TM. The first control unit 16 stops the motor M of the pump 14 and issues an alarm if the pressure on the secondary side of the first orifice 15a in the first pipe line 15 does not exceed P2 even after the predetermined time T has elapsed. It's like this. The timer TM used here is reset when a pressure exceeding pressure P2 is detected.

On the other hand, the first control unit 16 closes the first valve 15b and stops the motor M of the pump 14 based on the signal H from the pressure sensor 15c. As a result, the supply of fuel from the fuel storage tank 11 to the plurality of first connection portions 15d is stopped.

Here, the refueling system 10 of this embodiment uses two timers TM to delay the time when the first valve 15b is closed and the time when the motor M of the pump 14 is stopped. Although the delay times of the two timers TM may be the same, it is preferable that the delay time during which the motor M of the pump 14 is stopped is longer. That is, it is preferable that the motor M of the pump 14 is stopped after the first valve 15b is closed. Note that the first control unit 16 immediately closes the first valve 15b and stops the motor M of the pump 14 upon receiving the signal H from the pressure sensor 15c, without using the timer TM. You can also do this.

Furthermore, the fuel storage tank 11 of this embodiment is provided with a level sensor 11a. The level sensor 11a transmits a signal when the fuel in the fuel storage tank 11 falls below a set level. The first control unit 16 stops the motor M of the pump 14 based on the signal from the level sensor 11a.

- Circuit of fire extinguishing solution replenishment system In FIG. 2, the extinguishing solution storage tank 21, fuel tank 22, and pump 24 included in the extinguishing solution replenishment system 20 have already been described with reference to FIG. Further, the engine E, generator G, and motor M included in the fire extinguishing solution replenishment system 20 in FIG. 2 correspond to the drive source 23 in FIG. 1.

Both the primary side and the secondary side of the pump 24 are connected to the fire extinguishing solution storage tank 21 via a pipe line. A pressure control valve 24a is provided in a conduit connected to the secondary side of the pump 24. Furthermore, the primary side of the first pipeline 25 is connected to the pipeline connected to the secondary side of the pump 24 . The secondary side of the first pipe line 25 is branched into a plurality of branches, and each branched end is provided with a first connection part 25d via a valve. The plurality of first connection parts 25d are, for example, hose connection headers provided with a plurality of connection fittings.

The fire extinguishing solution stored in the fire extinguishing solution storage tank 21 is sucked into the pump 24, and flows through the first pipe line 25 to the plurality of first connections 25d. On the other hand, when the discharge pressure of the pump 24 exceeds a preset constant pressure, the pressure control valve 24a is in an open state. Thereby, the fire extinguishing solution discharged from the pump 24 is returned to the fire extinguishing solution storage tank 21 again. As a result, the pressure on the primary side of the first conduit 25 (the primary side of the first orifice 25a described below) is kept constant.

The first conduit 25 is provided with a first orifice 25a, a first valve 25b, and a pressure sensor 25c. The first valve 25b is located on the primary side of the first conduit 25. The first valve 25b allows or stops the flow of the fire extinguishing solution into the first pipe line 25. The first orifice 25a is located on the secondary side of the first valve 25b in the first conduit 25. The first orifice 25a has a circular hole with a smaller diameter than the inner diameter of the first conduit 25. The first orifice 25a controls the flow rate and pressure of the fire extinguishing solution flowing inside the first pipe line 25.

The pressure sensor 25c detects the pressure on the secondary side of the first orifice 25a in the first conduit 25 and transmits a signal. Two types of pressures P1 and P2 are set in the pressure sensor 25c of this embodiment. The pressure P1 indicates the upper limit, and the pressure P2 indicates the lower limit, with a relationship of P1>P2. The pressure sensor 25c transmits a signal H when it detects a pressure equal to or higher than the pressure P1, and transmits a signal L when it detects a pressure equal to or lower than the pressure P2.

The first control unit 26 is electrically connected to each of the level sensor 21a, the motor M of the pump 24, the first valve 25b, the pressure sensor 25c, and the plurality of timers TM. The first control unit 26 controls the pump 24 and the first valve 25b based on signals from the level sensor 21a, the pressure sensor 25c, and the plurality of timers TM. That is, the automatic supply of the fire extinguishing solution by the fire extinguishing solution replenishment system 20 is realized by the control of the first control unit 26. The control of the fire extinguishing solution replenishment system 20 by the first control unit 26 will be described later.

Here, the fuel tank 22 of the fire extinguishing solution supply system 20 is connected to the above-mentioned fuel supply system 10. The refueling system 10 is provided with the plurality of first connection parts 15d described above. On the other hand, the fire extinguishing solution replenishment system 20 is provided with a second connection part 27c corresponding to the first connection part 15d. The second connection portion 27c is, for example, a hose connection header equipped with a connection fitting. The first connecting portion 15d and the second connecting portion 27c are connected to each other by a hose 17. The length of the hose 17 is based on the distance between the fuel replenishment system 10 and the fire extinguishing solution replenishment system 20. The fuel tank 22 receives fuel supply from the refueling system 10 via the second connection 27c.

The fuel tank 22 is connected to the second connection portion 27c via the second pipe line 27. The second conduit 27 is provided with a second orifice 27a and a second valve 27b. The second orifice 27a is located on the primary side of the second conduit 27. The second orifice 27a has a circular hole with a smaller diameter than the inner diameter of the second conduit 27. The second orifice 27a controls the flow rate and pressure of the fuel flowing within the second pipe line 27. The second valve 27b is located on the secondary side of the second orifice 27a. The second valve 27b allows or stops the flow of fuel into the second pipe line 27.

Further, the fuel tank 22 is provided with a level sensor 22a. The level sensor 22a transmits a signal when the fuel in the fuel tank 22 falls below a set level. Two types of levels X1 and X2 are set in the level sensor 22a of this embodiment. Level X1 indicates the upper limit, and level X2 indicates the lower limit, with a relationship of X1>X2. The level sensor 22a transmits a signal H when the fuel in the fuel tank 22 reaches a level X1 or higher, and transmits a signal L when the fuel in the fuel tank 22 reaches a level X2 or lower.

The second control section 28 is connected to the level sensor 22a and the second valve 27b. The second control section 28 controls the second valve 27b based on the signal from the level sensor 22a. The control of the second valve 27b by the second control section 28 will be described later.

・Control of fire extinguishing liquid supply system 1 (supply of fire extinguishing liquid)
The first control unit 26 immediately drives the motor M of the pump 24 based on the signal L from the pressure sensor 25c, and then opens the first valve 25b. Thereby, the supply of the fire extinguishing solution from the fire extinguishing solution storage tank 21 to the plurality of first connection parts 25d is started.

Here, the fire extinguishing solution replenishment system 20 of this embodiment uses one timer TM to measure a predetermined time T from the time when the signal L is received. The first control unit 26 stops the motor M of the pump 24 and issues an alarm if the pressure on the secondary side of the first orifice 25a in the first pipe line 25 does not exceed P2 even after the predetermined time T has elapsed. It's like this. The timer TM used here is reset when a pressure exceeding pressure P2 is detected.

On the other hand, the first control unit 26 closes the first valve 25b and stops the motor M of the pump 24 based on the signal H from the pressure sensor 25c. As a result, the supply of the fire extinguishing solution from the fire extinguishing solution storage tank 21 to the plurality of first connections 25d is stopped.

Here, the fire extinguishing solution replenishment system 20 of this embodiment uses two timers TM to delay the time when the first valve 25b is closed and the time when the motor M of the pump 24 is stopped. Although the delay times of the two timers TM may be the same, it is preferable that the delay time during which the motor M of the pump 24 is stopped is longer. That is, it is preferable that the motor M of the pump 24 is stopped after the first valve 25b is closed. Note that the first control unit 26 immediately closes the first valve 25b and stops the motor M of the pump 24 upon receiving the signal H from the pressure sensor 25c, without using the timer TM. You can also do this.

Furthermore, the fire extinguishing solution storage tank 21 of this embodiment is provided with a level sensor 21a. The level sensor 21a transmits a signal when the fire extinguishing stock solution in the fire extinguishing stock tank 21 falls below a set level. The first control unit 26 stops the motor M of the pump 24 based on the signal from the level sensor 21a.

・Control of fire extinguishing liquid replenishment system 2 (fuel supply)
The second control unit 28 immediately opens the second valve 27b based on the signal L from the level sensor 22a. When the second valve 27b is opened, if the motor M of the pump 14 of the refueling system 10 is running and the first valve 15b is open, the first pipe of the refueling system 10 The fuel flowing in the line 15 is supplied to the fuel tank 22 via the hose 17 and the second line 27.

Here, when the second valve 27b is opened, the motor M of the pump 14 of the refueling system 10 may not be driving, and the first valve 15b may be in a closed state. Even in such a case, if the second valve 27b of the fire extinguishing liquid supply system 20 is opened, the fuel in the first pipe line 15 of the fuel supply system 10 will flow to the outside, and the secondary side of the first orifice 15a will be closed. The pressure becomes below P2. As a result, the refueling system 10 drives the motor M of the pump 14 to open the first valve 15b.

On the other hand, the second control unit 28 immediately closes the second valve 27b based on the signal H from the level sensor 22a. As a result, fuel supply to the fuel tank 22 is stopped. Thereafter, when the fuel in the first conduit 15 of the refueling system 10 stops flowing to the outside, the pressure on the secondary side of the first orifice 15a becomes equal to or higher than P1. As a result, the refueling system 10 closes the first valve 15b and stops the motor M of the pump 14.

- Circuit of Pump System In FIG. 2, the fuel tank 32, water pump 34, and water intake pump 36 included in the pump system 30 have already been described with reference to FIG. Further, the engine E, the generator G, and the motor M included in the pump system 30 in FIG. 2 correspond to the water supply drive source 33 or the water intake drive source 35 in FIG. 1 .

The fuel tank 32 of the pump system 30 is connected to the refueling system 10 described above. The refueling system 10 is provided with the plurality of first connection parts 15d described above. On the other hand, the pump system 30 is provided with a second connection part 37c corresponding to the first connection part 15d. The second connection part 37c is, for example, a hose connection header equipped with a connection fitting. The first connecting portion 15d and the second connecting portion 37c are connected to each other by a hose 17. The hose 17 has a length that takes into account the distance between the refueling system 10 and the pump system 30. The fuel tank 32 receives fuel from the refueling system 10 via the second connection 37c.

The fuel tank 32 is connected to the second connecting portion 37c via the second pipe line 37. The second conduit 37 is provided with a second orifice 37a and a second valve 37b. The second orifice 37a is located on the primary side of the second conduit 37. The second orifice 37a has a circular hole with a smaller diameter than the inner diameter of the second conduit 37. The second orifice 37a controls the flow rate and pressure of the fuel flowing within the second pipe line 37. The second valve 37b is located on the secondary side of the second orifice 37a. The second valve 37b allows or stops the flow of fuel into the second conduit 37.

Further, the fuel tank 32 is provided with a level sensor 32a. The level sensor 32a transmits a signal when the fuel in the fuel tank 32 falls below a set level. Two types of levels X1 and X2 are set in the level sensor 32a of this embodiment. Level X1 indicates the upper limit, and level X2 indicates the lower limit, with a relationship of X1>X2. The level sensor 32a transmits a signal H when the fuel in the fuel tank 32 reaches a level X1 or higher, and transmits a signal L when the fuel in the fuel tank 32 reaches a level X2 or lower.

The second control section 38 is connected to the level sensor 32a and the second valve 37b. The second control section 38 controls the second valve 37b based on the signal from the level sensor 32a. Control of the second valve 37b by the second control section 38 will be described later.

A motor M of the water intake pump 36 is connected to a generator G via a power cable. Moreover, the pump P of the water intake pump 36 is connected to the water supply pump 34 via a hose. The water intake pump 36 can be unloaded into the pump system 30 and placed into the water with the hose and power cable connected. Water pump 34 is connected to pump 44 of mixing system 40 .

・Pump system control (fuel supply)
The second control unit 38 immediately opens the second valve 37b based on the signal L from the level sensor 32a. When the second valve 37b is opened, if the motor M of the pump 14 of the refueling system 10 is running and the first valve 15b is open, the first pipe of the refueling system 10 The fuel flowing in the line 15 is supplied to the fuel tank 32 via the hose 17 and the second line 37.

Here, when the second valve 37b is opened, the motor M of the pump 14 of the refueling system 10 may not be driving, and the first valve 15b may be in a closed state. Even in such a case, if the second valve 37b of the pump system 30 is opened, the fuel in the first pipe line 15 of the refueling system 10 will flow to the outside, and the secondary side of the first orifice 15a will be at pressure P2. The following is true. As a result, the refueling system 10 drives the motor M of the pump 14 to open the first valve 15b.

On the other hand, the second control unit 38 immediately closes the second valve 37b based on the signal H from the level sensor 32a. As a result, fuel supply to the fuel tank 32 is stopped. Thereafter, when the fuel in the first conduit 15 of the refueling system 10 stops flowing to the outside, the pressure on the secondary side of the first orifice 15a becomes equal to or higher than P1. As a result, the refueling system 10 closes the first valve 15b and stops the motor M of the pump 14.

-Circuit of the mixing system In FIG. 2, the fire extinguishing solution tank 41, fuel tank 42, pump 44, and mixer 45 included in the mixing system 40 have already been described with reference to FIG. Further, the engine E, generator G, and motor M included in the mixing system 40 in FIG. 2 correspond to the drive source 43 in FIG. 1.

As mentioned above, the mixing system 40 includes a fire extinguishing solution tank 41 and a fuel tank 42. First, the configuration of the circuit related to the fire extinguishing solution tank 41 will be explained. The fire extinguishing solution tank 41 of the mixing system 40 is connected to the above-mentioned fire extinguishing solution replenishment system 20. The fire extinguishing solution replenishment system 20 is provided with the plurality of first connection parts 25d described above. On the other hand, the mixing system 40 is provided with a second connection part 46c corresponding to the first connection part 25d. The second connection portion 46c is, for example, a hose connection header equipped with a connection fitting. The first connecting portion 25d and the second connecting portion 46c are connected to each other by a hose 17. The length of the hose 17 is based on the distance between the fire extinguishing solution supply system 20 and the mixing system 40. The fire extinguishing liquid tank 41 receives the supply of fire extinguishing liquid from the fire extinguishing liquid supply system 20 via the second connection part 46c.

The fire extinguishing liquid tank 41 is connected to the second connection part 46c via the second pipe line 46. The second conduit 46 is provided with a second orifice 46a and a second valve 46b. The second orifice 46a is located on the primary side of the second conduit 46. The second orifice 46a has a circular hole with a smaller diameter than the inner diameter of the second conduit 46. The second orifice 46a controls the flow rate and pressure of the fire extinguishing solution flowing within the second pipe line 46. The second valve 46b is located on the secondary side of the second orifice 46a. The second valve 46b allows or stops the flow of the fire extinguishing solution into the second pipe line 46.

Further, the fire extinguishing liquid tank 41 is provided with a level sensor 41a. The level sensor 41a transmits a signal when the fire extinguishing solution in the fire extinguishing solution tank 41 falls below a set level. Two types of levels X1 and X2 are set in the level sensor 41a of this embodiment. Level X1 indicates the upper limit, and level X2 indicates the lower limit, with a relationship of X1>X2. The level sensor 41a transmits a signal H when the extinguishing concentrate in the extinguishing concentrate tank 41 reaches level X1 or higher, and transmits a signal L when the extinguishing concentrate reaches level X2 or lower.

The second control section 48 is connected to the level sensor 41a and the second valve 46b. The second control section 48 controls the second valve 46b based on the signal from the level sensor 41a. Control of the second valve 46b by the second control section 48 will be described later.

Next, the configuration of a circuit related to the fuel tank 42 will be explained. The fuel tank 42 of the mixing system 40 is connected to the refueling system 10 described above. The refueling system 10 is provided with the plurality of first connection parts 15d described above. On the other hand, the mixing system 40 is provided with a second connection part 47c corresponding to the first connection part 15d. The second connection portion 47c is, for example, a hose connection header equipped with a connection fitting. The first connecting portion 15d and the second connecting portion 47c are connected to each other by a hose 17. The hose 17 is sized to accommodate the distance between the refueling system 10 and the mixing system 40. The fuel tank 42 receives fuel from the refueling system 10 via the second connection 47c.

The fuel tank 42 is connected to the second connection portion 47c via the second pipe line 47. The second conduit 47 is provided with a second orifice 47a and a second valve 47b. The second orifice 47a is located on the primary side of the second conduit 47. The second orifice 47a has a circular hole with a smaller diameter than the inner diameter of the second conduit 47. The second orifice 47a controls the flow rate and pressure of the fuel flowing within the second pipe line 47. The second valve 47b is located on the secondary side of the second orifice 47a. The second valve 47b allows or stops the flow of fuel into the second pipe line 47.

Further, the fuel tank 42 is provided with a level sensor 42a. The level sensor 42a transmits a signal when the fuel in the fuel tank 42 falls below a set level. Two types of levels X1 and X2 are set in the level sensor 42a of this embodiment. Level X1 indicates the upper limit, and level X2 indicates the lower limit, with a relationship of X1>X2. The level sensor 42a transmits a signal H when the fuel in the fuel tank 42 reaches a level X1 or higher, and transmits a signal L when the fuel in the fuel tank 42 reaches a level X2 or lower.

The second control section 49 is connected to the level sensor 42a and the second valve 47b. The second control section 49 controls the second valve 47b based on the signal from the level sensor 42a. Control of the second valve 47b by the second control unit 49 will be described later.

Two inlets of the mixer 45 are connected to the fire extinguishing liquid tank 41 and the pump 44. The mixer 45 mixes the fire extinguishing solution stored in the fire extinguishing solution tank 41 and the fire extinguishing water supplied from the pump 44 at a predetermined ratio to produce a foam fire extinguishing agent diluted to a predetermined concentration. Further, the outlet of the mixer 45 is connected to a water discharge pump 54 of a water discharge system 50.

・Control of mixing system (supply of fire extinguishing liquid)
First, the supply control of the fire extinguishing liquid by the second control unit 48 of the fire extinguishing liquid tank 41 will be explained. The second control unit 48 immediately opens the second valve 46b based on the signal L from the level sensor 41a. When the second valve 46b is opened, if the motor M of the pump 24 of the fire extinguishing liquid replenishment system 20 is being driven and the first valve 25b is in the open state, the The fire extinguishing solution flowing through the first pipe 25 is supplied to the fire extinguishing solution tank 41 via the hose 17 and the second pipe 46 .

Here, at the time when the second valve 46b is opened, the motor M of the pump 24 of the fire extinguishing solution replenishment system 20 may not be driving, and the first valve 25b may be in a closed state. Even in such a case, when the second valve 46b of the mixing system 40 is opened, the extinguishing liquid in the first pipe line 25 of the extinguishing liquid replenishment system 20 flows to the outside, and the secondary side of the first orifice 25a is The pressure becomes below P2. As a result, the fire extinguishing solution replenishment system 20 drives the motor M of the pump 24 to open the first valve 25b.

On the other hand, the second control unit 48 immediately closes the second valve 46b based on the signal H from the level sensor 41a. As a result, the supply of the fire extinguishing solution to the fire extinguishing solution tank 41 is stopped. Thereafter, when the fire extinguishing stock solution in the first conduit 25 of the fire extinguishing stock solution replenishment system 20 stops flowing to the outside, the pressure on the secondary side of the first orifice 25a becomes equal to or higher than P1. As a result, the fire extinguishing solution replenishment system 20 closes the first valve 25b and stops the motor M of the pump 24.

・Control of mixing system (fuel supply)
Next, fuel supply control by the second control section 49 of the fuel tank 42 will be explained. The second control unit 49 immediately opens the second valve 47b based on the signal L from the level sensor 42a. When the second valve 47b is opened, if the motor M of the pump 14 of the refueling system 10 is running and the first valve 15b is open, the first pipe of the refueling system 10 The fuel flowing in the line 15 is supplied to the fuel tank 42 via the hose 17 and the second line 47.

Here, when the second valve 47b is opened, the motor M of the pump 14 of the refueling system 10 may not be driving, and the first valve 15b may be in a closed state. Even in such a case, if the second valve 47b of the mixing system 40 is opened, the fuel in the first pipe line 15 of the refueling system 10 will flow to the outside, and the secondary side of the first orifice 15a will be at pressure P2. The following is true. As a result, the refueling system 10 drives the motor M of the pump 14 to open the first valve 15b.

On the other hand, the second control section 49 immediately closes the second valve 47b based on the signal H from the level sensor 42a. As a result, fuel supply to the fuel tank 42 is stopped. Thereafter, when the fuel in the first conduit 15 of the refueling system 10 stops flowing to the outside, the pressure on the secondary side of the first orifice 15a becomes equal to or higher than P1. As a result, the refueling system 10 closes the first valve 15b and stops the motor M of the pump 14.

- Circuit of Water Discharge System In FIG. 2, the fuel tank 52 and water discharge pump 54 included in the water discharge system 50 have already been described with reference to FIG. Further, the engine E, the generator G, and the motor M included in the water discharge system 50 in FIG. 2 correspond to the drive source 53 in FIG. 1.

The fuel tank 52 of the water spray system 50 is connected to the refueling system 10 described above. The refueling system 10 is provided with the plurality of first connection parts 15d described above. On the other hand, the water discharge system 50 is provided with a second connection part 55c corresponding to the first connection part 15d. The second connection portion 55c is, for example, a hose connection header equipped with a connection fitting. The first connecting portion 15d and the second connecting portion 55c are connected to each other by a hose 17. The length of the hose 17 is based on the distance between the refueling system 10 and the water discharge system 50. The fuel tank 52 receives fuel supply from the refueling system 10 via the second connection portion 55c.

The fuel tank 52 is connected to a second connecting portion 55c via a second pipe line 55. The second conduit 55 is provided with a second orifice 55a and a second valve 55b. The second orifice 55a is located on the primary side of the second conduit 55. The second orifice 55a has a circular hole with a diameter smaller than the inner diameter of the second conduit 55. The second orifice 55a controls the flow rate and pressure of the fuel flowing within the second pipe line 55. The second valve 55b is located on the secondary side of the second orifice 55a. The second valve 55b allows or stops the flow of fuel into the second conduit 55.

Further, the fuel tank 52 is provided with a level sensor 52a. The level sensor 52a transmits a signal when the fuel in the fuel tank 52 falls below a set level. Two types of levels X1 and X2 are set in the level sensor 52a of this embodiment. Level X1 indicates the upper limit, and level X2 indicates the lower limit, with a relationship of X1>X2. The level sensor 52a transmits a signal H when the fuel in the fuel tank 52 reaches a level X1 or higher, and transmits a signal L when the fuel in the fuel tank 52 reaches a level X2 or lower.

The second control section 56 is connected to the level sensor 52a and the second valve 55b. The second control section 56 controls the second valve 55b based on the signal from the level sensor 52a. Control of the second valve 55b by the second control section 56 will be described later.

The inlet of the water discharge pump 54 is connected to the mixer 45 of the mixing system 40 described above. The outlet of the water discharge pump 54 is connected to a foaming nozzle or the like. The water discharge pump 54 sucks the foam fire extinguishing agent supplied from the mixer 45, foams the foam fire extinguishing agent with a foaming nozzle, etc., and discharges foam water.

・Control of water discharge system (fuel supply)
The second control unit 56 immediately opens the second valve 55b based on the signal L from the level sensor 52a. When the second valve 55b is opened, if the motor M of the pump 14 of the refueling system 10 is running and the first valve 15b is open, the first pipe of the refueling system 10 The fuel flowing in the line 15 is supplied to the fuel tank 52 via the hose 17 and the second line 55.

Here, when the second valve 55b is opened, the motor M of the pump 14 of the refueling system 10 may not be driving, and the first valve 15b may be in a closed state. Even in such a case, if the second valve 55b of the water discharge system 50 is opened, the fuel in the first pipe line 15 of the refueling system 10 will flow to the outside, and the secondary side of the first orifice 15a will be at pressure P2. The following is true. As a result, the refueling system 10 drives the motor M of the pump 14 to open the first valve 15b.

On the other hand, the second control section 56 immediately closes the second valve 55b based on the signal H from the level sensor 52a. As a result, fuel supply to the fuel tank 52 is stopped. Thereafter, when the fuel in the first conduit 15 of the refueling system 10 stops flowing to the outside, the pressure on the secondary side of the first orifice 15a becomes equal to or higher than P1. As a result, the refueling system 10 closes the first valve 15b and stops the motor M of the pump 14.

<First embodiment>
Next, a first embodiment of the fire extinguishing system shown in FIGS. 1 and 2 described above will be described with reference to FIG. 3.

As shown in FIG. 3, the fire extinguishing system 2 of the first embodiment includes the above-described fuel replenishment system 10, fire extinguishing solution replenishment system 20, pump system 30, mixing system 40, and water discharge system 50. The refueling system 10 and the fire extinguishing liquid replenishment system 20 are fixed equipment installed on land or a building, while the pump system 30, mixing system 40, and water spray system 50 are each mounted on separate vehicles. This is portable equipment.

The refueling system 10 and the fire extinguishing solution replenishing system 20 of the first embodiment are installed, for example, within the premises of a petroleum complex, a nuclear power plant, or the like. By making the fuel replenishment system 10 and the fire extinguishing solution supply system 20 fixed equipment, it is possible to make the fuel storage tank 11 and the fire extinguishing solution storage tank 21 extremely large in capacity. The fuel storage tank 11 and the fire extinguishing solution storage tank 21 have a large capacity that can store enough fuel to operate the fire extinguishing system 2 for, for example, several days to about a week.

The fire extinguishing solution replenishment system 20 is connected to each of the fuel replenishment system 10 and the mixing system 40 via hoses (not shown) arranged outdoors. The fire extinguishing solution replenishment system 20 in operation supplies the extinguishing solution to the mixing system 40 and receives fuel from the fuel replenishment system 10 . Thereby, the fire extinguishing liquid supply system 20 can continuously supply a large amount of fire extinguishing liquid to the mixing system 40 over a long period of time.

The pump system 30 of the first embodiment constitutes, for example, a fire pump vehicle by being mounted on a vehicle. The pump system 30 serving as a fire pump vehicle is placed near a water source such as an infinite water source when a fire occurs. The water intake pump 36 is lowered from the vehicle and placed into water such as the sea or river. The pump system 30 is connected to each of the refueling system 10 and the mixing system 40 via hoses (not shown) arranged outdoors. The pump system 30 in operation supplies fire extinguishing water to the mixing system 40 and receives fuel from the refueling system 10 . Thereby, the pump system 30 can continuously supply a large amount of fire extinguishing water to the mixing system 40 over a long period of time.

The mixing system 40 of the first embodiment constitutes, for example, a chemical fire engine by being mounted on a vehicle. The mixing system 40 as a chemical fire engine is placed between the pump system 30 and the water spray system 50, for example, in the vicinity of the water spray system 50 when a fire occurs. The mixing system 40 is connected to each of the fuel replenishment system 10, the fire extinguishing solution replenishment system 20, the pump system 30, and the water spray system 50 via hoses (not shown) arranged outdoors. The mixing system 40 in operation receives the supply of fire extinguishing solution from the fire extinguishing solution supply system 20, receives the supply of fire extinguishing water from the pump system 30, and sprays a mixture of fire extinguishing water and fire extinguishing solution (foam fire extinguishing agent) into the water spray system. Supply to 50. Furthermore, the mixing system 40 during operation is supplied with fuel from the refueling system 10 . Thereby, the mixing system 40 can continuously supply a large amount of fire extinguishing foam to the water spray system 50 over a long period of time.

The water cannon system 50 of the first embodiment is mounted on a vehicle to constitute, for example, a water cannon vehicle, an elevated water cannon vehicle, a refracting water cannon vehicle, a large-capacity foam water cannon, or the like. A water spray system 50, such as a water cannon truck, is placed near a fire site, such as an oil tank, when a fire occurs. The water spray system 50 is connected to each of the refueling system 10 and the mixing system 40 via hoses (not shown) arranged outdoors. The water spray system 50 in operation receives a supply of foam fire extinguishing agent from the mixing system 40, and sprays foam water from a foam nozzle or the like. Furthermore, the water discharge system 50 in operation receives a supply of fuel from the refueling system 10 . Thereby, the water spray system 50 can continuously spray a large amount of foam water over a long period of time.

<Second embodiment>
Next, a second embodiment of the fire extinguishing system shown in FIGS. 1 and 2 described above will be described with reference to FIG. 4.

As shown in FIG. 4, in the fire extinguishing system 3 of the second embodiment, a pump system 30 and a mixing system 40 are mounted on one vehicle, and constitute, for example, a chemical fire pump vehicle. The pump system 30 and the mixing system 40 are connected to each other via a hose (not shown) arranged inside the vehicle. Further, the pump system 30 and the mixing system 40 are connected to the refueling system 10 via a hose (not shown) arranged outdoors. Further, the mixing system 40 is connected to the fire extinguishing solution supply system 20 and the water spray system 50 via a hose outside the vehicle (not shown). The other configuration of the fire extinguishing system 3 of the second embodiment is the same as that of the first embodiment described above, and it is possible to continuously spray a large amount of foam water over a long period of time.

According to the fire extinguishing system 3 of the second embodiment, the pump system 30, the mixing system 40, and the water discharge system 50 are integrated into two portable equipment. Thereby, in the event of a fire outbreak, the pump system 30, mixing system 40, and water discharge system 50 can be quickly deployed. Additionally, the number of hoses placed outside in the event of a fire is reduced, and the effort required by workers to connect the hoses is reduced. Also, in this embodiment, the pump system 30 and the mixing system 40 may share one fuel tank. Furthermore, by using a single driving source for the water spray system 50 and the mixing system 40, the configuration of the fire extinguishing equipment can be simplified, reduced in size, and reduced in weight.

<Third embodiment>
Next, a third embodiment of the fire extinguishing system shown in FIGS. 1 and 2 described above will be described with reference to FIG. 5.

As shown in FIG. 5, in the fire extinguishing system 4 of the third embodiment, a pump system 30, a mixing system 40, and a water discharge system 50 are mounted on one vehicle, and constitute, for example, a large chemical fire engine. This large chemical fire engine is equipped with a foaming nozzle for foaming the foam fire extinguishing agent. The pump system 30 and the mixing system 40 are connected to each other via a hose (not shown) arranged inside the vehicle. Similarly, the mixing system 40 and the water discharging system 50 are also connected to each other via a hose (not shown) arranged inside the vehicle. Moreover, the pump system 30, the mixing system 40, and the water discharge system 50 are connected to the refueling system 10 via a hose (not shown) arranged outdoors. Further, the mixing system 40 is connected to the fire extinguishing solution replenishment system 20 via a hose (not shown) placed outdoors. The other configuration of the fire extinguishing system 4 of the third embodiment is the same as that of the first embodiment described above, and it is possible to continuously discharge a large amount of foam water over a long period of time.

According to the fire extinguishing system 4 of the third embodiment, the pump system 30, the mixing system 40, and the water discharge system 50 are integrated into one portable equipment. Thereby, in the event of a fire outbreak, the pump system 30, mixing system 40, and water discharge system 50 can be deployed extremely quickly. Additionally, the number of hoses placed outdoors in the event of a fire is further reduced, and the effort required by workers to connect the hoses is significantly reduced. The fire extinguishing system 4 of the third embodiment has high mobility and can be quickly deployed to a fire site, and is suitable for initial fire extinguishing that is carried out early after the occurrence of a fire. Furthermore, in this embodiment, pump system 30 and mixing system 40 may share one fuel tank. In addition to this, if the driving sources for the water spray system 50 and the mixing system 40 are unified, the configuration of the fire extinguishing equipment is simplified, and the size and weight are reduced.

<Effect>
As explained above, according to the fire extinguishing system of this embodiment, the fuel replenishment system, which is the replenishment unit, uses the fire extinguishing liquid replenishment system, the pump system, which is a plurality of extinguishing equipment, based on the pressure of its own first pipe line. , the mixing system and the water discharge system can be automatically supplied with fuel. Similarly, the fire extinguishing solution replenishment system serving as a replenishment unit can also automatically supply fire extinguishing solution to a plurality of mixing systems, which are a plurality of fire extinguishing equipment, based on the pressure of its own first conduit. In other words, the fire extinguishing system of this embodiment can automatically supply fuel and extinguishing liquid to multiple fire extinguishing equipment in operation using an extremely simple control method without monitoring the status of each individual fire extinguishing equipment. .

Therefore, the fire extinguishing system of this embodiment does not require a signal cable for connecting the supply section and the fire extinguishing equipment, unlike the conventional technology, and eliminates the possibility of failure due to disconnection of the signal cable, etc. I can do it. In addition, the fire extinguishing system of this embodiment can automatically supply not only fuel but also fire extinguishing solution to multiple fire extinguishing equipment, thereby realizing continuous spraying of large amounts of foam over a long period of time. Ru.

Here, the fire extinguishing system of this embodiment can accurately detect the pressure of the first pipe in the fuel replenishment system and the fire extinguishing solution replenishment system. That is, the fire extinguishing system of this embodiment has a configuration in which the first orifice is provided in the first pipe on the supplying section side, and the second orifice is provided in each of the second pipes on the plurality of fire extinguishing equipment sides. By setting the hole diameters of the first and second orifices to predetermined sizes, it is possible to set a predetermined pressure range when fuel or extinguishing liquid is flowing between the first and second orifices. can. As a result, when the second valve of each fire extinguishing equipment is opened or closed, it becomes possible to more accurately detect the pressure change in the first pipe line.

In addition, the liquid level in the fuel tank or fire extinguishing solution tank of fire extinguishing equipment may frequently fluctuate up and down due to vibrations or the like. Therefore, in the fire extinguishing system of this embodiment, even if the pressure in the first pipe reaches a predetermined pressure P1 or higher, the first valve is not immediately closed or the pump is stopped, but after a predetermined delay time has elapsed. , the first valve is closed and the pump is stopped. Such delay control prevents repeated opening and closing of the first valve and driving/stopping of the pump in response to frequent up and down movements of the liquid level, thereby preventing wear and tear on the first valve and the pump.

Furthermore, in the fire extinguishing system of this embodiment, if the first pipe line does not exceed a predetermined pressure P2 even after a predetermined time has elapsed after starting the supply of fuel or fire extinguishing liquid, the pump is stopped and an alarm is issued. It is designed to emit. Thereby, damage caused by leakage of fuel or fire extinguishing solution can be minimized.

In addition, in the fire extinguishing system of this embodiment, when the discharge pressure of the pump that sucks fuel or fire extinguishing liquid exceeds a preset constant pressure, the pressure control valve opens and the pump discharges no liquid. The fuel or fire extinguishing solution used is returned to the fuel storage tank or the fire extinguishing solution storage tank. As a result, the pressure on the primary side of the first pipe (the primary side of the first orifice) is kept constant, and an appropriate flow rate of fuel or fire extinguishing solution is always delivered to the first pipe.

<Other changes>
The fire extinguishing system of the present invention is not limited to the configuration and control method of the embodiment described above. For example, the fuel replenishment system and fire extinguishing solution replenishment system, which are the replenishment units, may be portable equipment mounted on a vehicle. Conversely, the fire extinguishing equipment, such as a pump system, a mixing system, and a water spray system, may be fixed equipment installed on land or a building.

Moreover, although the fire extinguishing system of the embodiment mentioned above was configured to detect the pressure on the secondary side of the first orifice in the first pipe line, the present invention is not limited to this. The detection method is not particularly limited as long as it is configured to detect the pressure on the secondary side of the first valve in the first pipe line. For example, a configuration may be adopted in which the differential pressure between the pressure on the primary side and the pressure on the secondary side of the first orifices 15a, 25a shown in FIG. 2 is detected.

Furthermore, the fire extinguishing solution supply system and the mixing system may be omitted from the fire extinguishing system of the embodiment described above, and a system may be used in which only fire extinguishing water is discharged. A system that sprays only fire extinguishing water can be used, for example, in a nuclear power plant as an emergency measure when water injection into the reactor is stopped.

1, 2, 3, 4 Fire extinguishing system 10 Refueling system (1st supply section)
11 Fuel storage tank (supply tank)
11a Level sensor 12 Fuel tank (replenishment tank)
13 Drive source 14 Pump 14a Pressure control valve 15 First pipe line 15a First orifice 15b First valve 15c Pressure sensor 15d First connection part 16 First control part 17 Hose 20 Fire extinguishing liquid supply system (other supply parts, fire extinguishing equipment )
21 Fire extinguishing solution storage tank (supply tank)
21a Level sensor 22 Fuel tank (replenishment tank)
22a Level sensor 23 Drive source 24 Pump 24a Pressure control valve 25 First pipe line 25a First orifice 25b First valve 25c Pressure sensor 25d First connection part 26 First control part 27 Second pipe line 27a Second orifice 27b Second Valve 27c Second connection part 28 Second control part 30 Pump system (fire extinguishing equipment)
32 Fuel tank (replenishment tank)
32a Level sensor 33 Drive source for water supply 34 Water pump 35 Drive source for water intake 36 Water intake pump 37 Second pipeline 37a Second orifice 37b Second valve 37c Second connection part 38 Second control part 40 Mixing system (fire extinguishing equipment)
41 Fire extinguishing liquid tank (replenishment tank)
41a Level sensor 42 Fuel tank (replenishment tank)
42a Level sensor 43 Drive source 44 Pump 45 Mixer 46, 47 Second pipe line 46a, 47a Second orifice 46b, 47b Second valve 46c, 47c Second connection part 48, 49 Second control part 50 Water discharge system (fire extinguishing equipment )
52 Fuel tank (replenishment tank)
52a Level sensor 53 Drive source 54 Water pump 55 Second pipe line 55a Second orifice 55b Second valve 55c Second connection part 56 Second control part 101, 102 Tank truck E Engine G Generator M Motor P Pump TM Timer

Claims (8)

(a) A water intake pump, a water intake drive source for driving the water intake pump, a replenishment tank that stores fuel for the engine of the water intake drive source, and a level for detecting the level of the fuel stored in the replenishment tank. A vehicle equipped with a pump system including a sensor and a water pump that discharges water sucked into the water intake pump;
(b) a fuel storage tank provided separately from the pump system;
(c) a control unit that opens and closes a valve in a fuel supply pipe based on a signal from the level sensor;
(d) A water supply system comprising a fuel replenishment system that automatically supplies and stops the supply of fuel in the fuel storage tank to the replenishment tank,
the valve of the fuel supply line is provided in the pump system;
The control unit detects that the fuel stored in the replenishment tank has become lower than a preset level, and opens the valve of the fuel supply pipe,
The fuel replenishment system is a water supply system that starts supplying fuel upon detecting that the pressure in the pipeline has become lower than a preset pressure. The control unit detects that the fuel stored in the replenishment tank has become higher than a preset level, and closes the valve of the fuel supply pipe,
The water supply system according to claim 1, wherein the refueling system detects that the pressure in the conduit has become higher than a preset pressure and stops supplying fuel. The water supply system according to claim 1 or 2, wherein the fuel replenishment system detects the pressure in the pipe line with a pressure sensor. The refueling system detects that the pressure in the conduit does not become higher than a preset pressure even after a predetermined period of time has elapsed from the start of supply of the fuel, and removes the fuel from the fuel storage tank to the refueling tank. The water supply system according to any one of claims 1 to 3, which employs a second fuel supply stop method of stopping the supply of fuel to the water supply system. The water supply system according to any one of claims 1 to 4, wherein the pump system further includes a water supply pump that discharges the water sucked into the water intake pump, and a water supply drive source for driving the water supply pump. . The refueling system includes one fuel replenishment system and a plurality of pump systems, and the refueling system supplies fuel from the one fuel storage tank to the plurality of tanks to be refueled based on the pressure of the pipeline. The water supply system according to any one of claims 1 to 5, wherein the water supply system automatically stops. A water discharge system including a water discharge pump provided on the secondary side of the water supply pump, a water discharge drive source for driving the water discharge pump, and a fuel tank that stores fuel for the engine of the water discharge drive source;
a second level sensor that detects the level of fuel stored in the fuel tank;
a second control unit that opens and closes a second valve of the fuel supply conduit based on a signal from the second level sensor;
the second valve of the fuel supply conduit is provided in the water discharge system;
The second control unit detects that the fuel stored in the fuel tank has become lower than a preset level, and opens the second valve of the fuel supply pipe,
The water supply system according to any one of claims 1 to 6, wherein the refueling system automatically supplies and stops fuel to the fuel tank based on the pressure of the pipe line. The water supply system according to any one of claims 1 to 7, wherein the water intake pump is configured to be able to be put into water, is put into infinite water supply, and sucks fire extinguishing water.