JP2002219188A - Beforehand operation system of equipment for fire fighting - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide sprinkler fire fighting equipment which lessens a pressure loss, has a simple structure, suppresses a waste of water to a minimum with unforeseen discharged water of a sprinkler's head, and of which the sprinkler's head sprinkles water again when the fire flares up again. SOLUTION: After a fire signal is received and a prescribed time has passed, an expansion of a waste of water sprinkled by a sprinkler 8 is prevented by closing a beforehand operation valve 10 and a startup valve 3 forcibly and by suspending a fire fighting activity. After closing the startup valve 3, if a detector K made a signal of the fire, a record of the elapsed time is reset, the startup valve 3 and the beforehand valve 10 are opened again with resetting the elapsed time, and the fire fighting activity restarts.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pre-operation type fire extinguishing system used for a fire extinguishing sprinkler system.

[0002]

2. Description of the Related Art In a sprinkler fire extinguishing system using a sprinkler head that operates by sensing the heat of a fire in the event of a fire, an external impact such as an object hitting the sprinkler head or a long object possessed by a person passing below. When added, the pyrolysis portion located inside the sprinkler head may break or deform. Then, the so-called "unintended water discharge" occurs in which the valve body held in the thermal decomposition part is displaced and releases water. If water is accidentally discharged even though no fire has occurred, a water loss accident may wet office equipment such as computers, copiers, and facsimile, expensive furnishings, and important documents in the room. I will.

Therefore, recently, a pre-operation type fire extinguishing system that does not inadvertently discharge water even when only the sprinkler head operates has come to be used. This pre-fire type fire extinguishing system has a fire detector such as a smoke detector or a heat detector installed near the sprinkler head mounted on the ceiling, and unless the sprinkler head and the fire detector are both activated, Is not released. Accordingly, the pre-actuated sprinkler fire extinguishing system is a highly reliable and safe fire extinguishing system that does not discharge water unless the fire detector is activated even if the sprinkler head receives an external impact.

[0004] A number of proposals have been made for pre-operation type fire extinguishing equipment, including Japanese Patent Application Laid-Open No. 7-204290.

[0005]

However, even in a pre-actuated fire extinguishing system, water is discharged from the sprinkler head even after the fire is completely extinguished unless the control valve of the water flow detection device is manually closed even after the fire has been completely extinguished. Is continued.

[0006] Since the sprinkler system does not occur frequently, such as the operation of the sprinkler system, it is difficult to know where the sprinkler control room is located in the building or to close the control valve promptly, so that a human being may operate the sprinkler head. If a considerable amount of time is required from when the emergency water discharge is noticed to when the system is shut down, water discharge from the sprinkler head may be continued during this time and water loss may increase.

It is an object of the present invention to provide a sprinkler fire extinguishing system which has a simple structure and minimizes water damage due to continuous water discharge after a fire extinguishing operation by a sprinkler head, and reliably discharges water from the sprinkler head in the event of a fire. And

[0098]

SUMMARY OF THE INVENTION Therefore, in the pre-operation type fire extinguishing system, the inventor of the present invention closes the starting valve after a lapse of a predetermined time from the detection of a fire signal and shuts off water supply from the primary side. The present invention has been completed by focusing on the fact that water damage can be prevented from spreading.

According to the present invention, a pre-operation valve having a primary side connected to a water supply source and a secondary side connected to a water supply pipe of a sprinkler head, a sprinkler head connected to a secondary side of the pre-operation valve, and a vicinity of the sprinkler head In a fire extinguishing system including a fire detector installed in a fire detector and a start-up valve that opens a pre-actuated valve in response to a signal from the fire detector, the fire detector is activated after a fire signal is input from the detector for a predetermined time. A pre-actuated fire extinguishing system characterized by providing a delay device for outputting a signal after a lapse of time, and closing the starting valve by a signal of the delay device irrespective of the ambient temperature of the sensor or the temperature of the fire.

[0010] After a predetermined time has elapsed after the fire detector outputs the fire signal, the starting valve is forcibly closed to stop the water discharge, thereby preventing the sprinkler from spreading water damage due to the water discharge. With this equipment, water damage due to sprinklers can be suppressed with a simple configuration.

At this time, if a fire signal is input from a fire detector because the fire continues or reignites, the starting valve of the pre-actuating valve is opened, and water is discharged from the opened sprinkler head. Is resumed.

[0012]

Embodiment

[0013] The delay device in the pre-operation type fire extinguishing system of the present invention may be initialized after outputting the signal.

The predetermined time in the pre-operation type fire extinguishing system of the present invention may be 1 minute to 20 minutes, preferably 5 minutes.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic view of an embodiment of a pre-operation type fire extinguishing system of the present invention.

The pre-actuated fire extinguishing system of the present invention comprises a pre-actuated valve 10 which is opened and closed in response to a signal from the control panel 100 of the present invention, a sprinkler head S installed on the secondary side of the pre-actuated valve 10, and a This is a pre-actuated fire extinguishing system including a fire detector K installed near the sprinkler head S, a water source 30 connected to the primary side I end, and a control panel 100 including a timer as a delay device inside.

The pre-actuation valve 10 has a running water detecting device 1 as a pre-acting valve main body and a motor-operated valve as a normally-closed starting valve 3 installed on the secondary side II of the flowing water detecting device 1. The starting valve 1 is opened and closed by a signal from the control panel 100.
The pre-operation type fire extinguishing equipment is divided into a primary side I and a secondary side II by a valve body of the flowing water detecting device 1.

A water supply pipe 4 is provided on the primary side I of the pre-operation type fire extinguishing equipment.
0 is connected, and the end of the water supply pipe 40 is immersed in the water of the water source 30, and a stop valve 90 is connected in the middle thereof. The water supply pipe 30 has a pressure tank 61 and a pressure switch 62 between the pump 20 and the flowing water detection device main body 1.
Is installed.

A branch pipe 50 extending to the indoor ceiling is connected to the secondary side II. A large number of sprinkler heads S are attached to the branch pipe 50. An end test device 80 having the same diameter as the sprinkler head S is connected to the end of the branch pipe. The terminal test apparatus 80 tests the function of each part of the sprinkler fire extinguishing equipment by discharging the same amount of water as the water sprinkled by the sprinkler head S. In this embodiment, a so-called dry-type pre-operation type fire extinguishing system which is normally pressurized by a pressurizing means (not shown) is employed.

A fire detector K is mounted near the sprinkler head S. The fire detector K is a heat detector, and is attached to each of the plurality of sprinkler head groups. The wiring of the fire detector K is connected to the control panel 100.

In order to transmit the operation of the sprinkler head S to the control panel 100 by an electric signal, a pressure switch 4 for decompression notification is provided on the secondary side II. The pressure switch 4 is connected to the control panel 100 by an electric wire.

The control panel 100 has a timer as a recording means for recording the elapsed time at the same time as the input of the fire signal of the fire detector K. Upon receiving the fire signal, the control panel 100 outputs an open signal of the starting valve 4. The control panel 100 outputs a signal for closing the start valve 3 after a predetermined time has elapsed from the timer.

Next, the operation of the pre-operation type fire extinguishing system of the present invention in the event of a fire will be described.

When a fire occurs, the fire detector K detects the fire and outputs a fire signal to the control panel 100. Then, the control panel 100 receives the fire signal of the fire detector K, starts a built-in timer, outputs a start valve opening signal to the start valve 3, and the start valve 3 is opened. When the starting valve 3 is opened, the valve of the flowing water detecting device 1 is opened and the branch pipe 50 is opened.
The inside is filled with water.

Next, when the disassembled portion of the sprinkler head S is disassembled due to the abnormally high temperature of the fire, the pressure in the pipe decreases, the pressure switch 61 in the pressure tank 60 operates, the pump 20 is activated, and the activated sprinkler head S is activated. Immediately, the water with the momentum gushes and extinguishes the fire. Further, the flowing water detecting device 1 detects the flow of water in the pipe, the pressure switch 4 is operated, an alarm signal is output from the control panel 100, and an alarm is generated from an alarm device (not shown).

The fire extinguishing activity is continuously performed, and when a predetermined time, here 5 minutes, elapses by the timer, the control panel 100
Outputs a closing signal of the starting valve 3 and forcibly closes the starting valve 3. After the transmission of the closing signal, the timer is reset and the apparatus enters a standby state until a fire signal is received again.

When the starting valve 3 is forcibly closed, the primary side and the secondary side of the starting valve 3 are shut off, so that the water discharge is interrupted.

When the fire is continuing or the fire signal is received again due to re-fire, etc., the start valve 3 is opened again, the timer is started, and the elapsed time is recorded. When the starting valve 3 is opened, the fire extinguishing operation can be performed again from the operating sprinkler head S.

If there is no fire signal, it is determined that the fire has been extinguished, and the water discharge activity is interrupted, so that water loss due to unnecessary water discharge from the sprinkler head S can be prevented.

When the sprinkler is subjected to an external impact and is outbursted, pressurized air is released from the nozzle of the sprinkler in the same manner as in a normal pre-actuated fire extinguishing system, but since the starting valve 3 is closed, the sprinkler head is closed. No water is released from S.

In the present invention, the timer is started after the fire detector K detects a fire, but the elapsed time may be measured from the time when the flowing water detecting device 1 detects flowing water.

By closing the start-up valve 3 after a predetermined time has elapsed after the operation of the sprinkler S, it is possible to prevent excess water from being released after the fire is extinguished by the sprinkler, thereby preventing water damage from expanding. . Further, since the starting valve 3 is forcibly closed by the timer, the facility can be easily constructed without requiring complicated control.

After the valve is closed, if a fire signal is input to the fire detector, a start valve opening signal is output from the control panel, so that the start valve is opened again and the fire extinguishing activity is resumed. With this configuration, it is possible to prevent water damage from spreading without complicating the control panel.

Although the above fire detector uses a heat detector,
Anything can be used as long as you can check the status of a fire,
It may be a flame detector or a smoke detector.

[0034]

As described above, the pre-operation type fire extinguishing system of the present invention forcibly closes the starting valve of the pre-operation valve after a predetermined time elapses, so that water loss due to excess water discharge from the sprinkler is achieved. This is a pre-operation type fire extinguishing system having an excellent feature that it is possible to prevent the expansion of the fire extinguishing system and to supply a pre-operation type fire extinguishing system provided with an inexpensive water loss expansion prevention unit by simplifying the equipment configuration.

[Brief description of the drawings]

FIG. 1 is a schematic diagram of a pre-actuated fire extinguishing system of the present invention.

[Explanation of symbols]

 I Primary side II Secondary side S Sprinkler K Fire detector 10 Pre-operation valve 20 Pump 30 Water supply source 40 Water supply pipe 50 Branch pipe 60 Pressure tank 80 Terminal test equipment 90 Stop valve

Claims (3)

[Claims] 1. A pre-operated valve having a primary side connected to a water supply source and a secondary side connected to a water supply pipe of a sprinkler head; a sprinkler head connected to a secondary side of the pre-operated valve; In a fire extinguishing system including an installed fire detector and a start valve that opens a pre-actuation valve in response to a signal from the fire detector, a predetermined time has elapsed since the fire signal was input from the detector and started. A pre-actuated fire extinguishing system, characterized in that a delay device for outputting a signal after the operation is provided, and the starting valve is closed by a signal from the delay device irrespective of the ambient temperature of the detector or the temperature of the fire. 2. The fire extinguishing system according to claim 1, wherein the delay device is initialized after outputting the signal. 3. The pre-actuated fire extinguishing system according to claim 1, wherein said predetermined time is 1 minute to 20 minutes.