JP5136227B2 - Fire-fighting water supply equipment and method - Google Patents

Description

  The present invention relates to a fire-fighting water supply facility and method that are installed in a plant premises and supply fire-fighting water in the event of a fire.

  Generally, in a large-scale plant, a fire-extinguishing water piping system is laid in preparation for a fire on the premises. For example, in a power plant, fire extinguishing water is supplied from a filtrate water tank to a fire extinguishing pipe with a fire extinguishing pump, and the fire extinguishing water can be supplied from a fire hydrant of the fire extinguishing pipe. In addition, the power station has a water storage pool as fire water.

  Fire extinguishing pipes are mainly buried in the road crossing so as not to block traffic, and are buried underground, by underground means such as trenches, or above by means such as pipe racks. The recent earthquake at the Kashiwazaki-Kariwa Nuclear Power Station led to an event where fire extinguishing pipes were cut off mainly in underground sections and fire fighting water could not be sent. A fire-fighting water storage pool is provided so that fire-fighting water can be secured even if the fire-extinguishing pipe is cut off. However, a pump is required to use the fire-fighting water in the storage pool, and it is necessary to secure a pump drive source. It becomes.

Here, as a fire extinguishing pump device that can obtain reliable and effective operation under adverse conditions at the time of disaster occurrence, it is unnecessary when switching from normal power supply to emergency power supply, when fire occurs Send an operation stop signal to the control circuit and power supply equipment circuit of electrical equipment, stop these equipment so that electricity does not flow, and when power is restored, set the disaster prevention equipment in advance according to the order of importance. There is one in which each device is started at a predetermined time interval (see, for example, Patent Document 1).
JP 2006-20846 A

  However, the thing of patent document 1 does not assume the cutting of the fire extinguishing piping of a fire extinguishing piping system. As a measure to prevent the fire-fighting piping from being cut off, it can be considered that the piping rack is modified to lay over. In addition, as a countermeasure when the fire-extinguishing pipe is cut off, it is considered to install a water storage pool near the filtered water tank that is the supply source of fire-extinguishing water, and to pump water while storing blow water from the filtered water tank. It is done.

  When the fire-extinguishing pipe is laid above the piping rack, not only the height of the piping rack is restricted but also a problem on the landscape occurs, and the cost increases. Installing a water storage pool in the vicinity of the filtrate water tank makes it difficult to secure a site for the water storage pool and increases the cost. Furthermore, in the water storage pool, the water head pressure cannot be secured, the pump suction pressure is insufficient, cavitation occurs in the pump, and the pump is damaged. In addition, fire extinguishing by the water storage pool also increases time loss.

An object of the present invention is to obtain a fire-fighting water supply facility and method capable of supplying fire-fighting water even when a fire-fighting pipe in a plant yard is cut off.

The fire-extinguishing water delivery system according to the invention of claim 1 includes a fire-extinguishing water tank that stores fire-extinguishing water, a fire-extinguishing pump that supplies fire-extinguishing water from the fire-extinguishing water tank to a fire-extinguishing pipe provided with a fire hydrant and a sprinkler, and the fire extinguishing It is planted in the blow pipe downstream of the blow valve of the water tank blow pipe, has a joint part and a stop cock , the fire extinguishing pipe is cut off, and the fire fighting water cannot be supplied from the fire fighting water tank to the fire fighting pipe A water supply port for connecting a portable pump to the joint portion, opening the stop cock and taking out fire-fighting water stored in the fire-fighting water tank, and provided downstream of the water supply port of the blow pipe. And a closing portion for closing the blow pipe.
According to a second aspect of the present invention, there is provided a fire-fighting water supply system according to the first aspect of the invention, wherein the blow valve is normally opened in the state where the fire-fighting water can be supplied from the fire-fighting water tank to the fire-fighting pipe. Water in the blow pipe is closed, and at the time of inspection, the water is discharged by opening the closing portion.

The water supply method for fire fighting according to the invention of claim 3 is the method of claim 1 when the water for fire fighting cannot be supplied from the water tank for fire fighting of the water supply equipment for fire fighting of claim 1 to the fire extinguishing pipe provided with a fire hydrant and a sprinkler. A portable pump is connected to the joint part of the water supply port of the water supply facility for fire extinguishing described above, a fire hose is connected to the portable pump, the stop cock of the water supply port is opened, and the portable pump is operated to The fire fighting water in the fire fighting water tank is discharged from a fire hose nozzle.

  According to the present invention, the blow pipe of the fire water tank is provided with a water supply port for taking out the fire water stored in the fire water tank, and a closing portion for closing the blow pipe is provided on the downstream side of the water supply port of the blow pipe. Therefore, even in the event of an emergency when the fire-extinguishing pipe is cut off, fire-fighting water can be taken out from the water supply port.

  In that case, a portable pump can be connected to the water supply port, and a fire hose can be connected to the portable pump to operate the portable pump, so that the fire fighting water in the fire fighting water tank can be discharged from the nozzle of the fire hose. When performing long-distance water supply exceeding the distance that can be delivered by one portable pump, it is possible to supply water for a longer distance by connecting a pump as necessary. As a fire-extinguishing water tank, it can be employed regardless of the type, such as a pure water tank, a filtered water tank, or a drinking water tank.

  FIG. 1 is a system configuration diagram of a fire-fighting water supply facility according to an embodiment of the present invention. FIG. 1 shows a case where the plant is a power plant having a No. 1 series power generation unit 11a and a No. 2 series power generation unit 11b. Although the illustration is omitted, the No. 1 series power generation unit 11a is composed of four axes with a gas turbine, a steam turbine, and a generator as one axis. Similarly, the No. 2 series power generation unit 11b is also a gas turbine, a steam turbine, and an electric power generation. It consists of four axes with one machine as the axis. A main transformer 12 is provided on each of the eight axes, and the power generation voltage generated by the generator on each axis is boosted and supplied to the transmission line.

  In preparation for such a fire on the premises of a power plant, a piping system for fire fighting water is laid. For example, in a power plant, filtered water is stored in three filtered water tanks 13a to 13c. Therefore, the filtered water tanks 13a to 13c are used as fire fighting water tanks, and the filtered water tanks 13a to 13c are stored in the filtered water tanks 13a to 13c. Use water as fire fighting water. As a fire-extinguishing water tank, not only filtered water tanks 13a to 13c but also pure water tanks or drinking water tanks can be adopted. In the following description, the case of the filtrate water tanks 13a to 13c will be described.

  The filtered water stored in the filtrate water tanks 13a to 13c is always supplied to the fire extinguishing pipe 15 as fire extinguishing water by the fire extinguishing pump 14. The fire-extinguishing pipe 15 is a piping system formed in a loop shape, and is laid in the vicinity of various devices inside the power generation units 11a and 11b, the main transformer 12 outside the power generation units 11a and 11b, and other equipment. The pressure of the pipe 15 is maintained at a predetermined pressure by the fire pump 14. The fire extinguishing pipe 15 is provided with a fire hydrant and a sprinkler. In the event of a fire, the fire extinguishing water is taken out from the fire hydrant, and the fire extinguishing water is sprinkled from the sprinkler. In addition, a water storage pool 17 is provided as fire fighting water in the premises of the power plant. In FIG. 1, the case where it is provided in the filtrate water tank 13a-13c side in the vicinity of No. 1 series power generation unit 11a is shown.

  Each of the filtrate water tanks 13a to 13c is provided with blow pipes 18a to 18c for draining the filtrate stored at the time of inspection, and the blow pipes 18a to 18c are provided with blow valves 19a to 19c. Each is provided. In the embodiment of the present invention, the water supply ports 20a to 20c and the closing portions 21a to 21c are provided downstream of the blow valves 19a to 19c of the blow pipes 18a to 18c. The water supply ports 20a to 20c are members for taking out filtrated water as fire-extinguishing water directly from the blow pipes 18a to 18c, and the closing portions 21a to 21c prevent the filtrate water from being discharged from the blow pipes 18a to 18c. It is a member for doing.

  FIG. 2 is a perspective view of the vicinity of the blow pipe 18 of the filtrate water tank 13. The blow pipe 18 is provided in the lower part of the filtrate water tank 13, and when the filtrate water tank 13 is inspected, the blow valve 19 is opened to drain the filtrate water. A water supply port 20 and a closing portion 21 are provided downstream of the blow valve 19 of the blow pipe 18. In the embodiment of the present invention, fire-fighting water can be taken out from the water supply port 20. Therefore, since it is necessary to keep the water from the tank body of the filtrate water tank 13 to the water supply port 20 in a normal use state, the blow valve 19 is always “open”, and the closing portion 25 of the blow pipe 18 The filtered water in the filtered water tank 13 is closed.

  The water supply port 20 is a member for taking out filtered water directly from the blow pipe 18 as fire-extinguishing water, and is implanted in the blow pipe 18 and has a joint portion 22 and a water stop cock 23 at both ends. A suction side of a portable pump (not shown) is connected to the joint portion 22 by a hose. A fire hose is connected to the discharge side of the portable pump. The closing part 21 is a member for preventing the filtered water from being discharged from the blow pipe 18, and is sandwiched between the flange parts 24 of the blow pipe 18 to prevent the filtered water from being discharged.

  FIG. 3 is a plan view showing an example of the closing portion 21. As shown in FIG. 3, the closing portion 21 includes a disc portion 25 and an annular portion 26, and a bolt hole 27 for passing a bolt is provided in the peripheral portion of the disc portion 25 and the annular portion 26, The annular portion 26 has a through hole at the center.

  When the water supply port 20 is applied to the filtrate water tank 13, it is necessary to keep the water from the tank body of the filtrate water tank 13 to the water supply port 20 in a normal state. The valve 19 is always “open”, and the filtrate in the filtrate tank 13 is closed by the closing portion 25 of the blow pipe 18. In the normal use state of the filtrate water tank 13, as shown in FIG. 2, the disc part 25 of the closing part 21 is sandwiched between the flange parts 24 of the blow pipe 18 and fastened with bolts.

  On the other hand, when the filtrate water tank 13 is inspected, the blow valve 19 is open in the normal use state of the filtrate water tank 13, so the blow valve 19 is once closed and the flange portion 24 of the blow pipe 18 is closed. The bolt is removed, the disc portion 25 of the closing portion 21 sandwiched between the flange portions 24 is removed, and the annular portion 26 of the closing portion 21 is sandwiched between the flange portions 24 and fastened with bolts. Thus, the annular portion 26 of the closing portion 21 is sandwiched between the flange portions 24 of the blow pipe 18 and fastened with bolts. Therefore, when the blow valve 19 is opened in this state, the filtrate from the blow pipe 18 passes through the through hole of the annular portion 26, and the filtrate is discharged from the blow pipe 18.

  In the normal use state of the filtrate water tank 13, since the disk portion 25 of the closing portion 21 is sandwiched between the flange portions 24 of the blow pipe 18, filtration is performed from the filtrate water tank 13 even if the blow valve 19 is open. Water is not discharged from the blow pipe 18. Moreover, since the blow valve 19 is opened, the filtered water can be supplied from the water supply port 20.

  Therefore, when fire water cannot be supplied from the filtrate water tank 13 to the fire extinguishing pipe system, for example, a break occurs in any part of the fire extinguishing pipe 15 of the water supply equipment for fire extinguishing, and the fire pump 14 stops and the fire extinguishing pipe system is stopped. When water for fire extinguishing can no longer be supplied, water for fire extinguishing is taken out from the water supply port 20 of the blow pipe 18.

  In FIG. 3, the closing part 21 composed of the disk part 25 and the annular part 26 is shown attached to the flange part 24 of the blow pipe 18, but filtered water can be drained at the time of inspection, and fire-extinguishing water is supplied from the water supply port 20. Anything can be used as long as the drainage of the filtered water can be closed when taking out. For example, the closing part 21 can be configured by a valve body.

  Although the blow valve 19 is set to “open” in the normal use state, the blow valve 19 is set to “closed” in the normal use state. The filtered water may be supplied from the water supply port 20.

  Next, FIG. 4 is a system configuration diagram showing a use state in an emergency of the fire-fighting water supply system of the present invention. In an emergency situation in which the fire-fighting water cannot be supplied from the filtrate water tank 13 to the fire-fighting piping system, the fire-extinguishing pump 14 stops and the fire-fighting water cannot be taken out from the fire-fighting piping 15, so as shown in FIG. A portable pump 28 is connected to the 18 water supply ports 20 via a hose 29, and a fire hose 31 is connected to the portable pump 28 to take out fire-fighting water from the water supply port 20 of the filtrate water tank 13. The filtered water tank 13 which is a water supply source of fire extinguishing water normally has a water level of about 10 m. The suction pressure of the portable pump can be secured by the water head pressure, and the pressure of the portable pump 28 is increased to lengthen the water for fire extinguishing. Transport distance. At present, water can be sent to a radius of 500 m with one portable pump.

  FIG. 4 shows a case where fire extinguishing water taken out from the water supply port 20 of the filtrate water tank 13 is pressurized by the portable pump 28, discharged from the nozzle of the fire hose 31 to the water storage pool 17 and stored in the water storage pool 17. . And the water for fire extinguishing is pumped up with the pump of the fire engine 30 from the water storage pool 17, and the water for fire extinguishing is further conveyed by the fire hose 31 of the fire engine 30 for a long distance. When there is no water storage pool 17, water can be sent to a long distance by further connecting a pump.

  FIG. 5 is a flowchart showing an example of a water supply method for fire fighting according to the embodiment of the present invention. First, it is determined whether fire water can be supplied from the filtrate water tank 13 (S1). For example, when the fire-extinguishing pipe 15 is broken, the fire-extinguishing pump 14 is stopped and fire-extinguishing water cannot be supplied to the fire-extinguishing pipe 15, so it is determined whether or not it is in such a state. When fire-extinguishing water cannot be supplied from the filtrate water tank 13, the portable pump 28 is connected to the water supply port 20 of the filtrate water tank 13 via the hose 29 (S2). In this case, the suction side of the portable pump 28 is connected to the water supply port 20 via the hose 29, and the fire hose 31 is connected to the discharge side of the portable pump 28 (S3).

  Then, the water supply port 20 is opened (S4). Since the blow valve 19 is always “open”, when the water supply port 20 is opened, water is supplied, and the portable pump 28 is operated to secure water pressure and discharge water from the nozzle of the fire hose 31 (S5). . As described above, the overwater tank 13 normally has a water head pressure of about 1 [kPa] (1 atm) because the water level is about 10 m. Furthermore, by operating the portable pump 28, the water pressure is kept at 0.4 [MPa] or more, and water can be supplied within a radius of 500 m.

  FIG. 6 is a flowchart showing another example of the water supply method for fire fighting according to the embodiment of the present invention. In this example, the water storage pool 17 and the fire engine 30 are used in addition to the portable pump 28 to enable water supply from the filtrate water tank 13 to an area having a radius of 500 m or more.

  In FIG. 6, as in the case shown in FIG. 5, it is determined whether or not fire-extinguishing water can be supplied from the filtrate water tank 13 (S <b> 11). The suction side of the portable pump 28 is connected to the water supply port 20 of the water tank 13 via the hose 29 (S12), and the fire hose 31 is connected to the discharge side of the portable pump 28 (S13).

  And the fire hose 31 is guide | induced to the water storage pool 17, and the nozzle of the fire hose 31 is arrange | positioned toward the water storage pool 17 (S15). Thereby, the water for fire extinguishing can be supplied to the water storage pool 17. In this state, the water supply port 20 is opened (S15), the portable pump 28 is operated to ensure water pressure, water is discharged from the nozzle of the fire hose 31, and fire extinguishing water is stored in the water storage pool 17 (S16). The fire engine 30 takes water from the water storage pool 17 and discharges it from the fire hose 31 (S17). The fire engine is equipped with a fire pump, which keeps the water pressure at 0.4 [MPa] or higher and supplies water for extinguishing fire in the water storage pool 17 further. Thereby, the water supply from the filtrate water tank 13 to the area of radius 500m or more is enabled.

  In FIG. 6, the water storage pool 17 and the fire engine 30 are used in addition to the portable pump 28 to allow water to be supplied from the filtrate water tank 13 to an area having a radius of 500 m or more. It is also possible to prepare a portable pump and connect a plurality of portable pumps 28 to carry water over a long distance.

  According to the embodiment of the present invention, the blow pipe 18 of the filtrate water tank 13 is provided with the water supply port 20 for taking out the filtrate stored in the filtrate water tank 13 as fire-extinguishing water, and the water supply port 20 of the blow pipe 18 is provided. Since the closing part 21 for closing the blow pipe 18 is provided on the downstream side, the fire-extinguishing water can be taken out from the water supply port 20 even in an emergency when the fire-extinguishing water cannot be supplied from the filtrate water tank 13 to the fire extinguishing pipe 15.

  When taking out fire-fighting water from the water supply port 20, a portable pump 28 is connected to the water supply port 20, a fire hose 31 is connected to the portable pump 28, the water supply port 20 is opened, and the portable pump 28 is operated. Therefore, the water for extinguishing fire from the filtered water tank 13 can be easily discharged from the nozzle of the fire hose 31.

  Moreover, at present, it is possible to supply water to a radius of 500 m with one portable pump, but when performing long-distance water supply exceeding the distance that can be delivered with one portable pump, if necessary, By connecting the pump directly, water can be sent to a longer distance.

1 is a system configuration diagram of a fire-fighting water supply facility according to an embodiment of the present invention. The perspective view of the vicinity of the blow piping of the filtrate water tank in embodiment of this invention. The top view which shows an example of the closing part in embodiment of this invention. The system block diagram which shows the use condition at the time of emergency of the water supply equipment for fire extinguishing of this invention. The flowchart which shows an example of the water supply method for fire extinguishing concerning embodiment of this invention. The flowchart which shows another example of the water delivery method for fire extinguishing concerning embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 ... Power generation unit, 12 ... Main transformer, 13 ... Filtrated water tank, 14 ... Fire extinguishing pump, 15 ... Fire extinguishing pipe, 17 ... Water storage pool, 18 ... Blow piping, 19 ... Blow valve, 20 ... Water supply port, 21 ... Closed , 22 ... Joint part, 23 ... Stop cock, 24 ... Flange part, 25 ... Disc part, 26 ... Ring part, 27 ... Bolt hole, 28 ... Portable pump, 29 ... Fire hose, 30 ... Fire truck , 31 ... Fire hose

Claims (3)

Fire fighting water tank storing fire fighting water,
A fire pump for supplying fire water from the fire water tank to a fire extinguishing pipe provided with a fire hydrant and a sprinkler;
It is planted in the blow pipe downstream of the blow valve of the blow pipe of the fire-extinguishing water tank, has a joint part and a stop cock , the fire-extinguishing pipe is cut off, and fire-extinguishing water is supplied from the fire-extinguishing water tank to the fire-extinguishing pipe When it becomes impossible, a water supply port for connecting a portable pump to the joint part, opening the stop cock and taking out fire-fighting water stored in the fire-fighting water tank;
A fire-fighting water supply system, comprising: a closing portion that is provided downstream of the water supply port of the blow pipe and closes the blow pipe.   In a state where fire-extinguishing water can be supplied from the fire-extinguishing water tank to the fire-extinguishing pipe, the blow valve is always opened, the water in the blow pipe is closed at the closing part, and at the time of inspection, the closing part is opened to open the water. The fire-fighting water-feeding facility according to claim 1, wherein When fire-extinguishing water cannot be supplied from the fire-extinguishing water tank of the fire-extinguishing water supply facility according to claim 1 to a fire-extinguishing pipe provided with a fire hydrant and a sprinkler,
A portable pump is connected to the joint portion of the water supply port of the fire-fighting water supply facility according to claim 1,
Connecting a fire hose to the portable pump;
Open the stop cock of the water supply port,
A fire-fighting water-feeding method, wherein the portable pump is operated to discharge the fire-fighting water in the fire-fighting water tank from the nozzle of the fire hose.

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