JPS60129059A - Monitor apparatus of fire extinguishing equipment - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a monitoring device for fire extinguishing equipment that monitors whether the fire extinguishing equipment that supplies pressurized fire extinguishing water to a fire extinguishing head and releases it from a fire pump is in a normal operable state.

Conventionally, in sprinkler fire extinguishing equipment, etc., pressurized fire extinguishing water is supplied from the fire pump to a main pipe, which is connected to a branch pipe via an automatic alarm valve for each floor. The piping configuration is such that multiple fire extinguishing heads are connected to branch pipes.

On the other hand, in the event of a fire, a pressure switch installed in the pressure tank detects a drop in the pressure inside the pipe due to the operation of the fire extinguishing head, and activates the fire pump.

By the way, if such fire extinguishing equipment is used for a long time, water may leak due to loosening of pipe connections, etc. When water leaks, the pressure inside the pipes decreases, and the pressure rises as in the case of a fire. The fire pump is activated by the activation of the tank's pressure switch, and the reduced pressure inside the pipes is restored to the specified pressure.

However, even if the fire pump is started to restore the pressure in the pipe due to a water leak, unless the water leak is stopped, the drop in pressure in the pipe cannot be prevented. If this had occurred, there was a risk of equipment damage or personal injury.

Additionally, it was unclear whether the water leak was occurring in the wood pipe or in the branch pipe.

The present invention was made in view of these conventional problems, and it is possible to notify a drop in pressure inside a pipe due to a water leak before the fire pump is started, and to identify whether the water leak is in the main pipe or in a branch pipe. The purpose of this invention is to provide a monitoring device for fire extinguishing equipment.

In order to achieve this objective, the present invention supplies fire extinguishing water pressurized by a fire extinguishing pump to a fire extinguishing head through a main pipe and a branch pipe branched from the main pipe for each floor via an automatic alarm valve. In a monitoring device for fire extinguishing equipment that detects an automatic alarm valve pressure switch or a drop in main pipe pressure and starts a fire pump, the branch pipe is equipped with a branch pipe pressure detection means for detecting a drop in pipe internal pressure, and the wood pipe side A main pipe pressure detecting means is provided for detecting that the main pipe pressure has decreased to a predetermined pressure before the pump is started and outputting an alarm.

Embodiments of the present invention will be described below based on the drawings.

The figure is an explanatory diagram showing an example of fire extinguishing equipment equipped with the monitoring device of the present invention.

First, to explain the configuration, a fire pump 1 driven by a motor 2 is installed on the ground 11i81F of the building, and the drive of the fire pump 1 is controlled by a pump control panel 3.

A suction pipe 5 is lowered from the suction side of the fire pump 1 to a water source tank 4 provided in the basement of the floor where the fire pump 1 is installed, and a main pipe 6 is connected to the discharge side of the fire pump 1. The main pipe 6 extends vertically to the top floor of the building.

A branch pipe 8 is connected via an automatic alarm valve 7 to the main pipe 6 passing through each floor of the building, 1F, 2F, . . . .

A plurality of fire extinguishing heads 9 are connected to the branch pipe 8 via branch pipes.

Here, the automatic alarm valve 7 opens the valve with the extinguishing water that flows when the fire extinguisher rad 9 is activated by the heat of the fire, and when the valve opens, the automatic alarm valve pressure switch 1O provided in the automatic alarm valve 7 is activated. , a starting signal for the fire extinguishing pump 1 can be given to the pump control panel 3.

The pipe bed of the branch pipe 8 branched and connected to the main pipe 6 via the automatic alarm valve 7 is connected to the drain pipe 12 via the gate valve 11, and the gate valve 11 is in a closed state under normal monitoring conditions. be.

On the other hand, a pressure tank 14 is installed in the basement 81F where the fire pump 1 is installed, and a main pipe 6 is branched and connected to the bottom of the pressure tank 14, and the air in the pressure tank 14 is compressed by the water pressure of the main pipe 6. The internal pressure of the main pipe 6 is kept above a certain pressure by the reaction force of the compressed air.

Next, the device configuration for realizing the monitoring device of the present invention will be described at $
2. At dawn, the automatic alarm valve 7 installed in the branch pipe 8 on each floor
A branch pipe pressure switch 15 is provided together with a pressure gauge 16 on the secondary side of the pump control panel 3 or the branch pipe pressure switch 15 detects that the internal pressure of the branch pipe 8 has fallen below a certain pressure. The detection output is given to a monitoring device in a central monitoring room (not shown). Further, the branch pipe pressure switch 15 and the pressure gauge 16 are installed at easily visible positions such as on the wall surface of each floor.

Furthermore, the pressure tank 14 installed in the basement 81F is equipped with a pump starting pressure switch that is activated when the internal pressure of the main pipe 6 drops below a certain pressure and outputs a pump starting signal to the pump control panel 3. 17 is provided, and
For the 1C main pipe that detects that the internal pressure of the main pipe 6 has decreased to a predetermined pressure before starting the pump based on the output of the pump starting pressure switch 17 provided in the pressure tank 14, and issues a water leak alarm of the main pipe 6. A pressure sensor 1B is provided together with a pressure gauge 19. The pressure detected by the main pressure sensor 18 is given to the pump control panel 3 or the monitoring panel in the central monitoring room (not shown). When this is detected, a water leakage alarm for the main pipe 6 is issued.

Further, in this embodiment, a printer 20 is installed in the pump control panel 3, a branch pipe pressure switch 15 provided on the secondary side of the automatic alarm valve 7, and a main pipe pressure sensor provided in the pressure tank 14. The drop in pressure inside the branch pipe 8 and the main pipe 6 due to the drop in pressure caused by the pipe 18 can be recorded. Of course, the pump control panel 3 may be provided with alarm means for a drop in branch pipe pressure and a drop in main pipe pressure.

Next, the effect will be explained.

First, in the normal monitoring state, the pressure inside the main pipe 6 and the branch pipe 8 is maintained at a predetermined pressure or higher by pressurizing the fire extinguishing water by temporarily starting the fire pump 1.

In this state, for example, if a fire breaks out on the 1st floor and one of the fire extinguisher rads 9 is activated due to the heat from the fire and releases fire extinguishing water, the flow of fire extinguishing water will open the automatic alarm valve 7 and cause the automatic alarm valve to open. The pressure switch 10 is activated, and the pressure in the pressure tank 14 is reduced via the main pipe 6, so that the pump starting pressure switch 17 is activated.

The activation of the fire extinguishing pump 1 based on the operation of the fire extinguisher 9 due to a fire is performed using either the output of the automatic alarm valve pressure h switch 10 or the output of the pump activation pressure switch 17 provided in the pressure tank 14. Normally, the fire pump 1 is driven by the output of the pump starting pressure switch 17 of the pressure tank 14. Activation of the fire extinguishing pump 1 by the automatic alarm valve pressure switch 10 is performed when the pressure of the pressure tank 14 decreases from the operation of the fire extinguishing head, for example, when the main pipe 6 to the pressure tank 14 has a large volume and a complicated shape. In this case, the fire pump 1 is activated by the output of the automatic alarm valve pressure switch 10, since there is a large time delay until it wakes up.
will start.

Next, if the pressure inside the branch pipe 8 decreases due to water leakage under normal monitoring conditions, before the pressure decreases to the main pipe 6 side via the automatic alarm valve 7, the secondary side of the automatic alarm valve 7, i.e. The branch pipe pressure switch 15 installed on the branch pipe 8 side detects a pressure drop in the branch pipe 8 due to water leakage, activates the alarm on the pump control panel 3 or the monitoring panel in the central monitoring room, and removes the branch pipe 80 where the water leak occurred. Water leak warnings will be provided along with floor-specific displays.

On the other hand, if the internal pressure of the main pipe 6 is reduced due to water leakage, the pressure detected by the main pipe pressure sensor 18 before the pressure drops to the operating pressure of the pump starting pressure switch 17 is determined to be the same as before starting the pump. When the pressure drops, the pump control panel 3 or a monitoring panel provided in the central monitoring room issues a water leak alarm based on the pressure drop in the main pipe 6. If a water leakage alarm for the main pipe 6 is issued based on the pressure detected by the main pipe pressure sensor 18, the fire pump 1 will eventually start if left as it is, so the main pipe 6
They will now be able to locate and repair water leaks.

In this way, when the pressure inside the pipe decreases due to a water leak in the main pipe 6, a water leak alarm is first issued, and when the pressure further decreases, the fire pump 1 is started, so it is known in advance from the water leak alarm that the fire pump 1 will start due to a water leak. It is possible to avoid suddenly starting the fire pump 1 due to a drop in the pressure inside the main pipe 6. In addition, the branch pipe pressure switch 15
It is possible to easily identify whether water is leaking from the branch pipe 8 or from the main pipe 6 by the alarm caused by the operation of the main pipe pressure sensor 18 and the alarm based on the pressure horn detected by the main pipe pressure sensor 18.

In the above embodiment, the drop in main pipe pressure before starting the pump is detected by the main pipe pressure sensor 18, but a pressure saw switch that is activated when the pressure drops to the level before starting the pump is used. Good too. In addition to fire pump 1, a small-capacity pump is installed to maintain the internal pressure of main pipe 6 at a constant pressure, and the small-capacity pump is activated when a drop in pressure to a constant level is detected before starting the fire pump. Alternatively, the pressure inside the main pipe 6 may be restored. Furthermore, by combining the branch pipe pressure switch 15 and the main pipe pressure sensor 18 with an automatic inspection system, the pressure inside the main pipe 6 and the branch pipe 8 can be constantly monitored, preventing a drop in the pressure inside the pipe due to water leakage, etc. Since it can be detected quickly, the reliability of fire extinguishing equipment can be further improved.

As explained above, according to the present invention, fire extinguishing water pressurized by a fire extinguishing pump is supplied to the fire extinguishing head through the main pipe and branch pipes branched from the main pipe via automatic alarm valves for each floor,
In a monitoring device for fire extinguishing equipment that detects the activation of an automatic alarm valve due to the activation of a fire extinguishing head or a drop in main pipe pressure and starts a fire extinguishing pump, a branch pipe pressure detection means is provided to detect a drop in internal pressure of a branch pipe. The fire pump is equipped with a mains pressure detection means that outputs an alarm when it detects that the mains pressure has fallen to a predetermined pressure before starting the pump. Since an alarm is output before startup, if there is a problem with the fire pump or motor, this prevents damage to equipment or personal injury due to sudden startup of the fire pump. This makes it possible to take repair measures for water leaks while the automatic activation of the fire pump is canceled.

Furthermore, since the pressure drop due to water leakage is performed separately on the branch pipe side and the main pipe side, the location of the water leakage can be easily identified.

[Brief explanation of drawings]

The figure is an explanatory diagram of fire extinguishing equipment equipped with the inspection device of the present invention. 1: Fire pump 2: Motor 3: Pump control panel 4: Water source tank 5: Suction pipe 6: Main pipe 7: Automatic alarm valve 8: Branch pipe 9: Fire extinguishing head 10: Automatic alarm valve Pressure switch 11.21: Gate valve 12: Drain pipe 14: Pressure tank 15: Branch pipe pressure switch 16. 19: Pressure gauge 17: Pump starting pressure switch 18: Main pipe pressure sensor 2O: Printer patent applicant Hochiki Co., Ltd. agent Patent attorney Susumu Takeuchi

Claims (1)

[Claims] Fire extinguishing water pressurized by a fire extinguishing pump is supplied to a fire extinguishing head through a main pipe and a branch pipe branched from the main pipe via an automatic alarm valve for each floor, and the automatic alarm valve is activated by the activation of the fire extinguishing head. A monitoring device for fire extinguishing equipment that starts the fire extinguishing pump by detecting the operation of the branch pipe or a drop in main pipe pressure, comprising a branch pipe pressure detection means for detecting a drop in the pressure inside the branch pipe, and a branch pipe pressure detection means for detecting a drop in the pressure inside the branch pipe; A monitoring device for fire extinguishing equipment equipped with main pipe pressure detection means that detects that the pressure has dropped to a predetermined level and outputs an alarm.