JPH0425027B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a fire extinguishing equipment inspection device that easily checks whether the fire extinguishing equipment, which supplies pressurized fire extinguishing water with a fire extinguishing pump to a fire extinguishing head and releases it, 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.

Incidentally, such fire extinguishing equipment is subject to periodic inspections in order to maintain the equipment in a state where it can always operate normally due to the thermal activation of the extinguishing head caused by a fire.In recent years, all inspection items have been checked. An automatic inspection device that automatically performs this has also been proposed.

However, although automatic inspection has the advantage of reducing management costs for large-scale fire extinguishing equipment, relatively small-scale fire extinguishing equipment still relies only on periodic manual inspections, and as a result, this is not done on a daily basis. Because the equipment was not monitored, there was a risk that the equipment would not function properly in the event of a fire, even if regular inspections were carried out.

The present invention has been made in view of these conventional problems, and is designed to improve reliability by constantly monitoring the minimum inspection items required for equipment operation even in small-scale fire extinguishing equipment. The purpose is to provide an inexpensive inspection device for fire extinguishing equipment.

In order to achieve this object, the present invention provides fire extinguishing equipment that supplies fire extinguishing water pressurized by a fire extinguishing pump to a fire extinguishing head via a main pipe and a branch pipe connected to the main pipe for each floor. A pressure detection means is installed on the secondary side of the valve body of the automatic alarm valve or the secondary side piping of the automatic alarm valve to detect a drop in the pressure inside the branch pipe to the extent that the automatic parallel valve does not operate. be.

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

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

First, to explain the configuration, a fire pump 1 that supplies fire extinguishing water under pressure is installed on the B1F basement of the building.
The fire pump 1 is rotationally driven by a motor 2, and the motor 2 is controlled by a pump control panel 3. A suction pipe 5 is connected to the suction side of the fire pump 1, and the suction pipe 5 is suspended in a water source tank 4. Further, a main pipe 6 is connected to the discharge side of the fire pump 1, and the main pipe 6 is raised from the basement floor B1F of the building to the top floor. Each floor that the main pipe 6 passes through, for example, the 1st floor shown in the diagram,
A branch pipe 8 is branched and connected to each 2F via an automatic alarm valve 10, a plurality of fire extinguishing heads 9 are attached to the branch pipe 8, and the end of the branch pipe 8 is connected to a drain pipe 12 via a gate valve 11. ing. In the automatic alarm valve 10 installed in the branch pipe 8 on each floor, the flow of fire extinguishing water caused by the activation of the fire extinguishing head 9 opens the valve element, and the contact point is closed by the pressure of the fire extinguishing water passing through the waterway formed by the opening of the valve element. An automatic alarm valve pressure switch 13 is provided. The detection signal of this automatic alarm valve pressure switch 13 is transmitted to an automatic fire alarm panel (not shown) or a pump control panel 3.
It can also be used as a starting signal for the fire pump 1.

On the other hand, on the basement floor B1F, a pressure tank 14 is installed, which is branched from the main pipe 6.
The internal pressure of the main pipe 6 is maintained at a predetermined value by compressing the internal air using the internal pipe pressure. The pressure tank 14 is also provided with a pressure switch 15, and when the pressure in the pressure tank 14 falls below a predetermined pressure, the pressure switch 15 operates to output a start signal for the fire pump 1 to the pump control panel 3.

The configuration of such fire extinguishing equipment is the same as the conventional one, but in addition to this, in the present invention, a pressure switch 16 and a pressure gauge 17 are installed on the secondary side of the automatic alarm valve 10 provided on each floor, that is, on the branch pipe 8 side. The pressure switch 16 and pressure gauge 17 are installed in a position that can be seen from the rooms on the 1st floor, 2nd floor, and so on.

The pressure switch 16 operates when the internal pressure of the branch pipe 8 drops below a certain pressure and outputs a switch signal.The switch signal of the pressure switch 16 is given to the pump control panel 3 installed in the basement B1F, and the pump The control panel 3 is equipped with a printer 18 that records and displays the detected output of the pressure switch 16 installed on each floor. When the pressure switch 16 detects a decrease in the pressure inside the branch pipe 8, the printer 18 inspects the corresponding floor. I'm trying to get the data out.

Next, the action will be explained.

First, in the steady monitoring state, fire pump 1
During this temporary operation, the pressure inside the main pipe 6 and branch pipe 8 is maintained at a constant pressure or higher.

In this state, for example, if a fire breaks out on the 1st floor and the fire extinguishing head 9 is activated after receiving heat from the fire, the internal pressure of the branch pipe 8 and main pipe 6 will drop due to the release of fire extinguishing water from the fire extinguishing head 9. , pressure tank 1
When the pressure of the compressed air 4 also decreases and becomes below a certain pressure, the pressure switch 15 is activated, and the pump control panel 3 starts the motor 2 and starts the fire pump 1. The fire extinguishing pump 1 may be activated in the event of a fire by a switch signal from an automatic alarm valve pressure switch 13 provided on the automatic alarm valve 10.

On the other hand, in a steady monitoring state, if water leaks in the branch pipe 8 installed on the 1st floor, for example, the automatic alarm valve 10 will not operate even if the flow of fire extinguishing water is as small as the leak, and the automatic alarm valve 10 will not operate until the pressure in the pressure tank 14 drops. Since there is a considerable time delay, the pressure inside the branch pipe 8 decreases due to water leakage. In the present invention, in order to reduce the pressure inside the branch pipe 8 due to water leakage,
Since a pressure switch 16 is provided on the secondary side of the automatic alarm valve 10, when the pressure inside the branch pipe 8 falls below the set pressure of the pressure switch 16, a switch signal is sent from the pressure switch 16 to the pump control panel 3. In the pump control panel 3, the pressure switch 16
Based on the switch signal, a buzzer or the like displays an alarm that the pressure inside the branch pipe 8 on the 1st floor has decreased, and also prints on the printer 18 that the pressure inside the pipe has decreased in the branch pipe 8 on the 1st floor. Based on this, appropriate water leakage measures can be taken.

On the other hand, in the case of water leakage in the main pipe 6, the pressure switch 16 installed on the branch pipe 8 side does not detect the pressure drop, and the pressure switch 15 installed in the pressure tank 14 detects the pressure drop in the main pipe 6. If the extinguisher pump 1 is activated by the pump control panel 3, therefore, if the extinguisher pump 1 is activated when there is no fire, it is known that the pressure inside the main pipe 6 has decreased, and the pressure switch 16 is activated. This can be distinguished from a decrease in the pressure inside the branch pipe 8 based on the detection output.

In the above embodiment, a pressure switch 16 is provided on the secondary side of the automatic alarm valve 10 to detect a pressure drop in the branch pipe 8.
However, as another embodiment, a pressure sensor that detects the pressure inside the branch pipe 8 in an analog manner may be used. If pressure can be detected, it can be provided at an appropriate position.

As explained above, according to the present invention, in a fire extinguishing equipment in which water for digestion pressurized by a fire pump is supplied to a digestion head through a main pipe and branch pipes branched from the main pipe on each floor, A pressure detection means is provided on the secondary side of the valve body of the installed automatic alarm valve or on the secondary side piping of the automatic alarm valve to detect a drop in the pressure inside the branch pipe to the extent that the automatic alarm valve does not operate. The internal pressure of the branch pipe connected to the digestion head, which is the minimum required for the operation of the digestion equipment, can be directly monitored at all times, and the reliability of the digestion equipment can be greatly improved.

In addition, since it is only necessary to install a pressure switch or pressure sensor on the branch pipe side to detect a drop in pipe pressure, the equipment cost for inspection is low, making it economical even for small-scale digestion equipment. This can be easily achieved without any restrictions.

Furthermore, since abnormalities in pipe internal pressure are displayed for water leaks in branch pipes along with floor-by-floor display, the location of the abnormality can be identified without going directly to the site, and prompt and appropriate waterproofing measures can be taken.

[Brief explanation of drawings]

The figure is an explanatory diagram of a fire extinguisher equipped with the inspection device of the present invention. 1: Digestion pump, 2: Motor, 3: Pump control panel, 4: Water source tank, 5: Suction pipe, 6: Main pipe, 8:
Branch pipe, 9: Extinguishing head, 10: Automatic alarm valve, 1
1: Gate valve, 12: Drain pipe, 13: Automatic alarm valve pressure switch, 14: Pressure tank, 15, 16: Pressure switch, 17: Pressure gauge, 18: Printer.

Claims (1)

[Scope of Claims] 1. In a fire extinguishing system in which fire extinguishing water pressurized by a fire pump is supplied to a fire extinguishing head via a main pipe and branch pipes branching from the main pipe for each floor, an automatic alarm provided in the branch pipe A fire extinguishing system characterized in that a pressure detection means is provided on the secondary side of the valve body of the valve or on the secondary side piping of the automatic alarm valve to detect a drop in the pressure inside the branch pipe to the extent that the automatic alarm valve does not operate. Inspection equipment.