JPH05337214A - Sprinkler fire extinguishing system - Google Patents

Abstract

PURPOSE:To prevent excessive hydraulic pressure water discharge to low layer stories even in the case of a building of multilayer stories, and to execute an operation by which a water loss is small and the fire extinguishing efficiency is high. CONSTITUTION:An operation position detecting means (flowing water detecting device 8) following the generation of a fire is provided at every story, and a control valve 12 is provided on the lower end part of a water main 3. The control valve 12 adjusts the water supply pressure of a pressure water supply device A to a prescribed value, based on the operation of the operating position detecting means.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sprinkler fire extinguishing equipment, and more particularly to a sprinkler fire extinguishing equipment having high fire extinguishing efficiency suitable for a multi-story building.

[0002]

2. Description of the Related Art In a conventional sprinkler fire extinguishing facility, a pump for supplying pressurized water to a sprinkler head is provided with a predetermined water discharge from the sprinkler head on the top floor of the building in which it is installed.
It is basically designed so that about 80 L / min of extinguishing water at a pressure of about 1 kgf / cm ² can be discharged at the same time for 30 water.

[0003]

A device that emits particulate fire extinguishing water is characterized in that it suppresses a fire, and water droplets having a diameter of 1.5 to 2.0 mm work efficiently.
In order to increase the ratio of such water drops,
It has been found effective to discharge water at a pressure of 0.5 to 4.5 kgf / cm ² .

In view of the above points, the present invention is a sprinkler fire extinguishing system devised so that even in a multi-storey building, excessive water pressure in the lower floors can be prevented from being released, and operation can be performed with low water loss and high fire extinguishing efficiency. Is provided.

[0005]

According to the present invention, a sprinkler fire extinguishing system is provided in which a plurality of sprinkler heads are provided branching from a water supply main on each floor of a building, and the fire water is supplied to the sprinkler heads operated by a pressurized water supply device. At
An operating position detecting means is provided for each floor when a fire occurs, and a control means for adjusting the water supply pressure of the pressurized water supplying device to a predetermined value based on the operation of the operating position detecting means is provided in the water supply main. It is characterized by.

Further, the control means is a control valve which directly intervenes in the water supply main and adjusts the water supply pressure by adjusting the flowing water, or is provided by branching from the water supply main and adjusts the water supply pressure by adjusting the drainage. It is characterized by being adjusted.

Further, the operating position detecting means includes a water flow detecting device for an automatic alarm valve, a fire detector in a pre-operated sprinkler fire extinguishing facility, an electric contact which opens and closes in conjunction with the operation of the sprinkler head, or an unwinding of the sprinkler head. A running water detector or the like in the pipe part may be used.

[0008]

When a fire occurs on a certain floor, the sprinkler head is opened to activate the water flow detection device of the automatic alarm valve on that floor, and sends a signal of the operating floor to the control valve. Based on the signal, the control valve controls the water supply pressure to the pipe connected to the secondary side of the pump to a corresponding pressure value. Then, the fire extinguishing water is supplied to the sprinkler head on the operating floor at a pressure within an appropriate range of fire extinguishing efficiency.

The control valve controls the pressure supplied to the pipe on the secondary side of the pump and controls the actual pipe diameter and the like by using a plurality of valve bodies, and its position is the position of the pump. It may be provided directly on the secondary pipe, on the branch pipe of the secondary pipe of the pump, directly on the primary pipe of the pump, or on the branch pipe of the primary pipe of the pump.

Further, since the operating position detecting means may use the signal sent from the flowing water detecting device of the automatic alarm valve in the ordinary sprinkler extinguishing equipment to the monitoring panel of the extinguishing equipment, it is not necessary to provide a detecting device or the like. Absent.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. A is a simplified view of a pressurized water supply device,
The pump 2 pressurizes the fire extinguishing water from the water source 1, and the water supply main 3
Motor 4 that drives the pump 2
It is shown. The pressurized water supply apparatus A is shown with a small accessory part omitted for easy understanding of the example. Further, the pressurized water supply device A is not limited to this system, and may be another water supply system such as a pressure storage system.

A branch pipe 6 for arranging a plurality of sprinkler heads 5 is branched from the middle of the water supply pipe 3 on each floor, and each branch pipe 6 is provided with an automatic alarm valve 7. Each automatic alarm valve 7 is provided with a water flow detection device 8 (operating position detection means) using a pressure switch or the like so as to detect water flow in the branch pipe 6 due to water discharge from the sprinkler head 5 operated by a fire. ing. The water flow detection device 8 plays the role of sending the signal to the monitoring board 10 through the signal line 9 and recognizing the floor on which the operation has been performed.

Although the fire extinguishing equipment having the above-mentioned structure has a system adapted to a wet type sprinkler fire extinguishing equipment using a closed type sprinkler head, it goes without saying that it can be similarly applied to other fire extinguishing equipment. is there.

In FIG. 1, a drainage pipe 11 is provided in a branched manner at a lower end portion of a water supply main 3 from a pressurized water supply device A, and a control valve 12 is provided in the middle of the drainage pipe 11. The control valve 12 is an electrically-operated valve whose opening can be adjusted and is always closed. The control valve 12 is opened by a signal from the monitoring panel 10 through a signal line 13, and the opening of a valve body (not shown) is set in accordance with a floor on which a fire operation is performed. Adjusted. With the drainage from the control valve 12,
The pressure at the lower end of the water supply main 3 is reduced, and a high pressure is not applied to the sprinkler head 5.

Here, the control valve 12 is an electrically operated control valve whose opening can be adjusted. However, as shown in FIG. 2, a plurality of valves 14, 15, 16, 17 (only opening and closing with different openings are provided. The electric discharge amount of the drain pipe 11 may be adjusted by operating the opening / closing of each valve. Also, FIG.
As shown in (3), a valve 18 that only opens and closes and a plurality of valves 19 that function as orifices by closing them may be combined to open and adjust the amount of drainage.

FIG. 4 shows a case where the control valve provided in the drainage pipe of FIG. 1 is directly provided in the water supply main pipe, and the constitution of the pressurized water supply device A, the branch pipe 6 and the like is the same as in FIG. In addition, those having the same reference numerals have the same functions and structures.

In FIG. 4, a control valve 20 is directly provided at the lower end portion of the water supply main 3 from the pressurized water supply device A. The control valve 20 is an electrically operated valve that is always open,
It is closed by the signal from 0 through the signal line 13,
The opening degree of the valve element (not shown) is adjusted according to the floor on which the fire has operated. By adjusting the flow rate of the control valve 20, the pressure on the secondary side can be reduced, and the same effect as in the case of FIG. 1 can be obtained.

Also in the control valve 20 of FIG.
Of course, as in the case of the control valve 12 of FIG.

The operation of the above embodiment when a fire occurs will be described below. When a fire occurs on a certain floor, the sprinkler head 5 at the corresponding position is opened and water is discharged. When water discharge from the sprinkler head 5 is started, running water is generated in the branch pipe 6, the automatic alarm valve 7 is opened, and the running water detection device 8 detects the running water in the branch pipe 6. The running water in the branch pipe 6 is transmitted from the running water detection device 8 to the monitoring board 10 through the signal line 9, and the monitoring board 10 displays the fire position and gives an alarm.

The motor 4 is activated by the pressure reduction detection in the water supply main 3 and the interlocking operation from the monitoring board 10, and the pressurized water supply from the pump 2 is started. The water pressure of this pump 2 is
It has the minimum pressurizing ability to be able to send water to the sprinkler head 5 on the top floor. Therefore, if the operated floor is below, the pressurization by the pump 2 is too high and the amount of discharged water becomes excessive, and at the same time, the amount of ineffective water due to the high pressure increases, which is very inconvenient.

Here, when the monitoring panel 10 receives a signal from the water flow detection device 8 and grasps the fire position, it sends a signal for proper pressurized water supply from the pump 2 through the signal line 13 to the control valve. 12 (20). Control valve 12 (20)
Is opened by the signal from the monitoring panel 10 (closed)
Then, the pressure in the water supply mains 3 is reduced by adjusting the opening degree of the valve body and draining (limiting the flow rate). Then, the fire extinguishing water is supplied to the sprinkler head 5 at an appropriate pressure, and an effective fire extinguishing activity with less water loss can be performed.

In the above description of the operation, the monitoring panel 10 once receives the signal from the water flow detection device 8, and the monitoring panel 10 determines a proper pressure and transmits it to the control valve 12 (20). The opening degree of the valve 12 (20) may be determined by the water flow detection device 8 itself and transmitted directly to the control valve 12 (20), or the control valve 12 (20) may be provided with a determination unit. Of course good things.

The operating position detecting means is the automatic alarm valve 7.
Although the water flow detection device 8 is used, a dedicated detection means may be provided, and depending on the equipment, a fire detector in the pre-operated sprinkler extinguishing equipment, an electrical contact that opens and closes in conjunction with the operation of the sprinkler head. Alternatively, a water flow detector in the unwinding pipe part of the sprinkler head can be used.

Since the present invention is to reduce the water supply pressure by the pressurized water supply device using a pump, in the case of the pressurized water supply device utilizing the elevated water tank, the control valve is naturally provided above the water supply main. May be provided, and thus the position of the control means of the invention is sufficient if it is connected to the water main.

[0025]

EFFECTS OF THE INVENTION According to the present invention, even in the case of a multi-story building, the operation associated with the occurrence of a fire is performed for the purpose of preventing excessive water pressure discharge on the lower floors and performing an operation with good fire extinction efficiency with less water loss. Position detecting means is provided for each floor, and control means for adjusting the water supply pressure of the pressurized water supply device to a predetermined value based on the operation of the operating position detecting means is provided in the water supply main. Therefore, when a fire occurs on a certain floor, the signal of the operating floor is sent by opening the sprinkler head, and the control valve applies the water pressure to the pipe connected to the secondary side of the pressurized water feeder from the signal. The pressure is controlled so that the sprinkler head on the operating floor is supplied with fire extinguishing water at a pressure within an appropriate range of fire extinguishing efficiency, and effective fire extinguishing activities with less water loss can be performed.

[Brief description of drawings]

FIG. 1 is a system diagram of a sprinkler fire extinguishing equipment showing an embodiment using the present invention.

2 is a diagram showing another embodiment of the control valve shown in FIG.

FIG. 3 is a view showing another embodiment of the control valve shown in FIG. 1, as in FIG.

FIG. 4 is a system diagram of a sprinkler fire extinguishing equipment showing another embodiment using the present invention.

[Explanation of symbols]

 3 Water Supply Main 5 Sprinkler Head 8 Flowing Water Detection Device (Operating Position Detection Means) 12, 20 Control Valve A Pressurized Water Supply Device

Claims (3)

[Claims] 1. A sprinkler fire extinguishing facility, which is provided with a plurality of sprinkler heads branching from a water supply main on each floor of a building and supplies extinguishing water to the sprinkler heads operated by a pressurized water supply device, in accordance with the occurrence of a fire. A sprinkler fire extinguisher characterized in that position detection means is provided for each floor, and control means for adjusting the water supply pressure of the pressurized water supply device to a predetermined value based on the operation of the operating position detection means is provided in the water supply main. Facility. 2. The sprinkler fire extinguisher equipment according to claim 1, wherein the control means is a control valve, which is directly interposed in the water supply main pipe and adjusts the water supply pressure by adjusting the flowing water. 3. The sprinkler fire extinguisher facility according to claim 1, wherein the control means is a control valve, is provided so as to branch from the main water supply pipe, and adjusts the water supply pressure by adjusting drainage.