JPH04198893A - Noncombustable gas extinguishing equipment for nuclear power plant - Google Patents

Abstract

PURPOSE:To achieve a simplification of a layout with a reduction in piping space by arranging a selection valve to introduce a noncombustible gas discharged from a noncombustible gas container to a chamber to be protected and a jet head to discharge the noncombustible gas into the chamber to be protected. CONSTITUTION:When a fire breaks out at a chamber A3, as a noncombustible gas discharge push button of a manual starter 5 set at an inlet of the chamber A3 is depressed, a signal is inputted into a field control panel 6 and after a delay time, the manual starter is put into operation by a signal from an electro magnetic opening device 8. Then, a starting gas of a gas container 7 for starting is released and a noncombustible gas flows into an instrumentation copper pipe 9. A signal enters the device 8 near the chamber A3 from a gas pressure type opener 13, the noncombustible gas is released from a non-combustible gas cylinder 2 to be gathered from cylinders 2 with a collection pipe 15 through a connecting pipe 14 and sent with one piping 17 to the selection valve 11 near the chamber A3. Then, the gas is discharged into the chamber A3 from a jet head 18 thereof A3 selected from the valve 11 to perform extinguishing.

Description

Detailed Description of the Invention [Object of the Invention] (Industrial Application Field) The present invention relates to nonflammable gas fire extinguishing equipment for nuclear power plants and the like.

(Prior Art) Each building of a nuclear power plant or the like is equipped with fire extinguishing equipment to prevent fires from occurring due to nonflammable gas, etc.

Conventional fire extinguishing equipment will be explained based on FIG. Nonflammable gas cylinders 2 are installed in the nonflammable gas cylinder chamber 1 so as to constantly release nonflammable gas, and the number of such cylinders is calculated from the volumes of the A chamber 3 and the B chamber 4. If we consider the case where the required number of cylinders in room A 3 is 4 and the number of cylinders required in room B 4 is 2, the number of nonflammable gas cylinders 2 is installed in nonflammable gas cylinder room 1, which is 4, and and B chamber 4, respectively.

For example, if a fire breaks out in Room A 3, when the release button of the manual activation device 5 installed near Room A 3 is pressed, a signal is sent to the local control panel 6, and the local control panel 6 activates the After the delay time, a signal is sent to the electromagnetic opening device 8. This signal activates the electromagnetic opening device 8, and the starting gas in the starting gas container 7 is released and passes through the instrumentation copper pipe 9 to the selection valve 1 for room A.
1, the selection valve 11 for chamber A is opened by gas pressure, and then the gas pressure type opening device 13 of non-flammable gas cylinder 2 is activated by gas pressure, and the non-flammable gas of 2 passes through the connecting pipe 14 to the non-flammable gas cylinder. , are collected in the collecting pipe 15, and sent from there to the injection head 18 of the A room 3, where they are discharged into the A room 3 to extinguish the fire.

In the case of the A chamber 3, all four nonflammable gas cylinders 2 are discharged, or in the case of the B chamber 4, only two are discharged by the action of the non-return valve 19.

In addition, if the nonflammable gas in the nonflammable gas cylinder 2 is released without the selection valve 11 opening, there is a risk that the pressure inside the collecting pipe 15 will increase and damage the collecting pipe 15, so one end of the collecting pipe 15 may be damaged. A safety device 16 is installed on the collector pipe 1.
5 is activated when the internal pressure exceeds a certain pressure to prevent pressure damage to the collecting pipe 15.

(Problem to be solved by the invention) In the conventional technology, the piping from the nonflammable gas cylinder room to the nonflammable gas protected room was branched off from the selection valve and ran to each room, or the pipe to be selected was connected to the protected room. If the number increases, the size of the nonflammable gas cylinder room becomes large, and many pipes run from the nonflammable gas cylinder room to each protected room, which is undesirable in terms of layout and safety.

The present invention has been made to solve the above problems,
The purpose is to provide nonflammable gas fire extinguishing equipment for nuclear power plants, etc., which reduces the selection valve space in the cylinder room and rationally arranges piping from the cylinder room to the vicinity of the protected room.

[Structure of the invention] (Means for solving the problem) In order to achieve the above object, the nonflammable gas fire extinguishing equipment for nuclear power plants, etc. of the present invention is arranged in the vicinity of the nonflammable gas fire extinguishing equipment and the protected room. a manual starting device, a field control panel that sends out a nonflammable gas release signal using the manual starting device, a starting gas container that releases a starting nonflammable gas in accordance with a command from the field control panel, and a starting gas a gas pressure release device operated by the gas pressure release device; a nonflammable gas container that releases nonflammable gas by the operation of the gas pressure release device; and a nonflammable gas released from the nonflammable gas container that is operated by the manual activation device. a selection valve for guiding the nonflammable gas to the protected room; a nonflammable gas pipe for sending nonflammable gas from the selection valve to the protected room; and an ejecting head that ejects water to.

(Function) Since the nonflammable gas fire extinguishing equipment of the present invention for nuclear power plants, etc. is configured as described above, if a fire breaks out in a protected room containing nonflammable gas, the nonflammable gas fire extinguishing equipment of the present invention is installed at the entrance of the protected room. When the manual activation device is pressed, a signal is sent to the field control panel, which activates the solenoid valve opening device. By the operation of this electromagnetic opening device, the starting gas in the starting gas container is released, a signal is sent to the gas pressure opening device, and when the gas pressure opening device is activated, nonflammable gas is released from each nonflammable gas cylinder. , is collected in a collecting pipe through a connecting pipe, and sent to a selection valve near the room to be protected by nonflammable gas piping, selected by this selection valve, and discharged from the injection head of the room to be protected into the room to be protected, extinguishing the fire. conduct.

(Example) Embodiments of the present invention will be described with reference to the drawings.

Note that the same components as those in the prior art described above will be described with the same reference numerals.

FIG. 1 is a system configuration diagram of an embodiment of the present invention, in which nonflammable gas cylinders 2 are installed in a nonflammable gas cylinder chamber 1 so as to constantly release nonflammable gas, and the number of nonflammable gas cylinders is 3 in chamber A. and the volume of chamber B 4. If we consider the case where the required number of cylinders in room A 3 is 4 and the number of cylinders required in room B 4 is 2, the number of nonflammable gas cylinders 2 is installed in nonflammable gas cylinder room 1, which is 4, and and B chamber 4, respectively. A manual activation device 5 is installed near the A room 3 and the B room 4. When the release button of this manual activation device 5 is pressed, a signal is sent to the local control panel 6, and the local control panel 6 is activated.
After a delay time of 20 seconds or more, a signal is sent to the electromagnetic opening device 8. The starting gas container 7 is activated by the electromagnetic opening device 8, and the starting gas passes through the instrumentation copper pipe 9. The gas pressure opening device 13
Activate.

As a result, nonflammable gas is released from the nonflammable gas cylinder 2. This nonflammable gas is passed through the connecting pipe 14. It passes through the collecting pipe 15 and the nonflammable gas pipe 17, passes through the selection valve 11 for chamber A or the selection valve 12 for chamber B, and is discharged into chamber A 3 or chamber B 4 by the injection head 18. 16 is a safety device, and 19 is a non-return valve.

Next, the operation of this embodiment will be explained.

If a fire breaks out in Room A 3, press the nonflammable gas release button of the manual activation device 5 installed in Room A 3.
A signal enters the field control panel 6, and after the delay time, the field control panel 6
The signal from the electromagnetic release device 8 is input and activated. The starting gas from the starting gas container 7 is released, nonflammable gas flows into the instrumentation copper pipe 9, and a signal enters the electromagnetic opening device 8 near the A room 3, which enters the gas pressure opening device I3, and the gas pressure opening device 13 is activated, nonflammable gas is released from the nonflammable gas cylinder 2, passes through the connecting pipe 14, and is collected from each cylinder in the collecting pipe 15. The selection valve 1 near the A room 3 is sent by the pipe 17 of
1 is selected and ejected from the injection head 18 of room A 3 into the room to extinguish the fire.

Note that even if a fire breaks out in Room B 4, the fire is extinguished in the same manner as in Room A 3.

[Effects of the Invention] As explained above, according to the present invention, the piping space is reduced by reducing the amount of non-flammable gas, the layout is simplified, and favorable effects in terms of safety can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a system configuration diagram of an embodiment of the present invention, and FIG. 2 is a system configuration diagram of a conventional nonflammable gas fire extinguishing equipment. 1...Nonflammable gas cylinder chamber 2...Nonflammable gas cylinder 3...Room A 4...Room B
5...Manual starting device 6...Field control panel
7... Starting gas container 8... Electromagnetic opening device
9...Instrumentation steel pipe 11/A room selection valve 12...
Selection valve for chamber B 13...Gas pressure release device 14...Connecting pipe 15...Collecting pipe 16...Safety device I7...
...Nonflammable gas piping 18...Rad I9 to injection
No-refund (8733) Agent Patent attorney Yoshiaki Inomata (and 1 other person) Figure 1

Claims (1)

[Claims] Nonflammable gas fire extinguishing equipment A manual activation device placed near the protected room, a local control panel that sends a nonflammable gas release signal using this manual activation device, and a nonflammable gas for startup based on commands from this local control panel. A starting gas container that releases, a gas pressure release device that operates with this starting gas, a nonflammable gas container that releases nonflammable gas by the operation of this gas pressure release device, and a nonflammable gas container that releases nonflammable gas from the nonflammable gas container. A selection valve for guiding nonflammable gas to the protection target room operated by the manual starting device, nonflammable gas piping for sending nonflammable gas from the selection valve to the protection target room, and this nonflammable gas piping. Nonflammable gas fire extinguishing equipment for a nuclear power plant, etc., comprising an injection head that discharges the nonflammable gas that has passed through it into the protected room.