JPH0634657U - Gas fire extinguisher alarm system - Google Patents

Abstract

(57) [Summary] [Purpose] If a gas fire extinguisher is inadvertently activated during inspection, an alarm is issued to prevent the fire extinguishing gas from being released by inadvertently opening the stop valve. [Structure] The shutoff valve 3 of the collecting pipe 2 is provided with a limit switch 4 which emits a signal when the valve is closed, and a pressure switch 5 is provided in front of the valve 3 on the collecting pipe 2 to close the shutoff valve 3. And the signal due to the gas pressure increase of the pressure switch 5 to issue an alarm.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

The present invention relates to an alarm device for informing the presence of a fire extinguishing gas in a pipe in a gas fire extinguisher such as CO ₂ .

[0002]

[Prior art]

In the CO ₂ fire extinguisher of FIG. 1, district pipes 10 and 11 provided for each fire target area are provided with district selection valves 8 and 9, and the district pipes 10 and 11 are connected to the collecting pipe 2 to store gas. It is connected to the container 1. The area selection valves 8 and 9 are connected to the activation containers 6 and 7 and the storage container 1 by activation operation pipes 12 and 13, respectively.

Further, in another CO ₂ fire extinguisher apparatus of FIG. 2, district pipes 10a and 11a provided for each fire target district are connected to a collecting pipe 2a and a gas storage container 1a. The area selection valves 8a and 9a are connected to the activation containers 6a and 7a and the storage container 1a by activation operation pipes 12a and 13a, respectively.

These CO ₂ fire extinguishers are provided with a shutoff valve 3 in the collecting pipe 2 in the device of FIG. 1 as an accident countermeasure so that CO ₂ does not radiate from the nozzle carelessly during inspection. I'm trying to close. Further, in the apparatus of FIG. 2, shut-off valves 3a and 3b are provided in front of the selection valves 8a and 9a of the start-up operation pipes 12a and 13a, respectively, so that the CO ₂ gas is not inadvertently released during inspection. . After the inspection is completed, these shutoff valves must be fully opened.

For this reason, the shutoff valve is configured to display the open / closed state of the valve on the control panel by a limit switch or the like when the valve is fully opened and when the valve is fully closed.

[0006]

[Problems to be solved by the device]

 However, in such an apparatus, if the closing valve is closed at the time of inspection and the apparatus is started by an inadvertent operation, if the closing valve is opened after completion of the inspection, gas will be emitted from the nozzle. In this case, there are many people in the fire target area, which is extremely dangerous for human life.

The present invention provides a device for preventing such an accident.

[0008]

[Means for Solving the Problems]

 As shown in FIG. 1, the present invention is, in a gas fire extinguisher in which a collecting valve 2 of a gas storage container 1 is provided with a shutoff valve 3, a limit switch 4 driven by the shutoff valve 3 for opening and closing the valve, A gas switch 5 is provided in front of the shutoff valve 3 in the gas collecting pipe 2, and an alarm is issued by a signal for closing the valve of the limit switch 4 and a signal for increasing the gas pressure of the pressure switch 5. It is an alarm system for fire extinguishing systems.

As shown in FIG. 2, another idea is to use a gas system quenching device in which shut-off valves 3a and 3b are provided in start-up operation pipes 12a and 13a of start-up vessels 6 and 7 that drive selection valves 8 and 9, respectively. In the fire device, limit switches 4a and 4b that are driven for opening and closing of the closing valve 3a3b, and pressure switches 5a and 5b that are located in front of the closing valves 3a and 3b and are provided on the start operation pipes 12a and 13a, respectively. An abnormality alarm device for a gas fire extinguisher that issues an alarm by a signal for closing the valves of the limit switches 4a, 4b and a signal for increasing the gas pressure of the pressure switches 5a, 5b.

[0010]

[Action]

 If the device is inadvertently started during inspection, the shut-off valve 3 is closed in the device of FIG. 1 and a signal for closing is given, and a signal for increasing the pressure of the pressure switch 5 due to the gas in the collecting pipe 2 is given. An alarm is issued from these two signals. As a result, it is possible to prevent the accident of accidentally opening the stop valve even if the inspection is completed.

In the apparatus shown in FIG. 2, the shut-off valves 3a and 3b are closed and a signal thereof is outputted, and also a signal of a gas pressure increase of the starting operation pipes 12a and 13a is outputted. An alarm is issued from these two signals. You can prevent accidents as well.

[0012]

【Example】

 FIG. 3 shows a circuit configuration for issuing an alarm by the signals of the limit switch and the pressure switch of the shutoff valve. S1 is a pressure switch, and an ON signal is output when the gas pressure rises. S2 is a limit valve of a closing valve. Circuit a outputs an ON signal when the valve is open, and circuit b outputs an ON signal when the valve is closed. A and B are and circuits, and C is an inverting circuit. And the circuits a, b and C are not always necessary.

The alarm may be a voice or display signal.

[0014]

[Effect of device]

According to this invention, even if the CO ₂ gas-based fire extinguisher is inadvertently started during inspection, an alarm will be issued immediately, so that the accident can be prevented inadvertently without opening the stop valve. it can. The conventional display device for opening and closing the shutoff valve is equipped with an equivalent switch to the limit switch according to the present invention. Therefore, this switch can be used as it is, and a pressure switch can be installed to provide an electric circuit. By installing an alarm device, the device can be easily improved.

[Brief description of drawings]

FIG. 1 is a piping system diagram showing an embodiment of a gas fire extinguisher of the present invention.

FIG. 2 is a piping system diagram showing another embodiment.

FIG. 3 is an electric system diagram according to the present invention.

Claims (2)

[Scope of utility model registration request] 1. A gas-based fire extinguisher in which a collecting valve is provided in a collecting pipe of a gas storage container, a limit switch driven by the closing valve for opening and closing of the valve, and a collecting pipe located in front of the closing valve. An abnormality alarm device for a gas fire extinguisher, which is provided with a pressure switch, and issues an alarm by a signal for closing the valve of the limit switch and a signal for increasing the gas pressure of the pressure switch. 2. A gas system fire extinguisher in which a closing valve is provided in a starting operation pipe of a starting container for driving a selection valve, and a limit switch driven for opening and closing the closing valve,
An abnormality alarm device for a gas fire extinguisher which is provided in front of the shutoff valve and which is provided with a pressure switch on a starting operation pipe, and which issues an alarm by a signal for closing the valve of the limit switch and a signal for increasing the gas pressure of the pressure switch. .