JPH07204290A - Pre-operated sprinkler fire extinguishing facility - Google Patents

Abstract

PURPOSE:To prevent water from flowing into piping or a down pipe even upon occurrence of the malfunction of a fire detector or the improper operation thereof during inspection by opening the valve of a water flow detection device, when electrical signals are outputted from both of a sprinkler head and the fire detector, for spraying water from the sprinkler head. CONSTITUTION:When a fire breaks out, a nearby fire detector K detects the occurrence thereof and sends an electrical signal to a control panel 11. Then, a sprinkler head S at the location of the fire operates and a switch thereon is tuned on, thereby sending an electrical signal to the panel 11. The panel 11, upon receipt of the signal previously sent from the detector K and another signal later sent from the head S, sends a signal to a solenoid valve 26 for the opening thereof. As a result, water in a chamber 19 flows outside through the valve 26, a piston moves externally and the upper end of a lock device 16 is pulled back, thereby opening a valve 2.

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 system for spraying water from a sprinkler head to extinguish a fire, particularly to a pre-actuated sprinkler fire extinguishing system.

[0002]

2. Description of the Related Art Sprinkler fire extinguishing equipment includes dry type and wet type. In the dry type sprinkler fire extinguishing equipment, water always flows up to the primary side (water source side) of the running water detection device, but compressed air is filled in the secondary side pipe to which the sprinkler head is attached. Generally, a dry type sprinkler fire extinguisher is an anti-freezing fire extinguisher used in cold regions where the cold is severe in winter. That is, in cold regions, if water is present in the pipe laid inside the ceiling, it freezes in the winter and expands to burst the pipe or destroy the sprinkler head attached to the pipe. Therefore, in cold climates, dry sprinkler fire extinguishing equipment that does not fill the secondary side is installed.

In a dry type sprinkler fire extinguishing system, when a fire occurs, the valve body of the water flow detection device opens due to the opening of the sprinkler head, and when water enters the secondary side, it reaches the activated sprinkler head through the pipe, Sprinkled from.

The wet type sprinkler fire extinguishing system cannot be used in cold regions because the primary side and the secondary side of the running water detector are filled with water from normal times, and it is filled in the pipe only by operating the sprinkler head. There was a problem that water loss would occur because the water would flow out into the room.

By the way, in a general sprinkler fire extinguishing facility, only the sprinkler head is attached to the ceiling surface regardless of the dry type or the wet type, and water is always sprinkled when the sprinkler head operates.
In this sprinkler head, the disassembled part incorporated in the sprinkler head decomposes due to an abnormally high temperature of the fire, and the valve element held in the disassembled part is opened and water is sprinkled. External shock,
For example, when a person's luggage passing below hits the disassembled part of the sprinkler head, the disassembled part may be destroyed and water may be sprayed by opening the valve body. It was

When the sprinkler head causes untimely watering, it causes a serious water damage such as an indoor computer, a facsimile machine, an office machine such as a copying machine, expensive furniture such as a rug, and important documents. Will be.

Therefore, recently, a pre-actuated sprinkler fire extinguishing system has been used in which water is not sprinkled from the sprinkler head even if the sprinkler head is operated due to accidental breakage. A pre-actuated sprinkler fire extinguisher is a fire detector such as a heat detector or smoke detector installed near the installation part of the sprinkler fire extinguisher, and when both the sprinkler head and the fire detector operate The water is sprayed from here. Therefore, in the pre-operation type sprinkler fire extinguishing system, the water in the pipe does not flow out into the room even if the sprinkler head is destroyed by an external impact, so that water loss does not occur Uses the sprinkler fire extinguishing equipment.

In the conventional pre-actuated sprinkler fire extinguishing equipment, when a fire occurs, a fire detector, which has a higher sensitivity than the sprinkler head, detects the fire and sends an electric signal to the control panel, and the control panel sends a signal to the running water detector. To prepare the water supply by opening the valve body of the water flow detection device. After that, when the sprinkler head is activated by the heat of the fire, water is sprinkled from the sprinkler head.

In other words, the pre-actuated sprinkler fire extinguishing system means that even if the sprinkler head receives an external impact and the disassembled part is destroyed, the fire detector does not operate, and therefore the signal from the fire detector detects running water. It is not sent to the device and the valve body of the water flow detection device will not open. On the contrary, only the fire detector operates, for example, a heat detector is installed near the outlet of the air conditioning equipment in the room and the heat detector detects the heat of heating or burns cigarette smoke or fish in the room. When the smoke is filled with smoke and the smoke detector detects this smoke, the sprinkler head is not operating even if the valve of the flow detector is opened by the signal from this fire detector. No water will be sprayed.

As described above, the pre-actuated sprinkler fire extinguishing system is an extremely excellent system in which the sprinkler head is actuated by an external impact, and the fire detector never sprinkles water by only one actuation of detecting heat or smoke which is not a fire. Safe measures have been taken.

[0011]

By the way, in the pre-operation type sprinkler fire extinguishing equipment, the incidental equipment must be regularly inspected by the Fire Service Law.
At this time, for the inspection of the alarm generation state, only the fire detector is activated, and the alarm state by the signal emitted from this is inspected. In the conventional pre-actuated sprinkler fire extinguishing equipment, at the time of this inspection, make sure that the valve body of the water flow detection device is not electrically opened by the control panel, or that the valve body of the water flow detection device is not opened manually. Although the inspection is performed, if the operation procedure is incorrect, when the fire detector is activated, the signal emitted from this will give an alarm and the valve body of the water flow detection device will open, causing a large amount of water to flow. It will flow into the secondary side pipe.

[0012] If water is left in the secondary side piping in the pre-actuated sprinkler fire extinguishing equipment, the original function of this equipment is lost, and the sprinkler head receives an external impact and the sprinkler head If the valve body is opened, water will flow out from here and cause water damage. Therefore, in the case of the conventional pre-actuated sprinkler fire extinguishing equipment, if an incorrect operation was performed during inspection, it was necessary to promptly drain the water that had flowed into the secondary side piping. This work requires the work of opening the drain valve and draining the water in the pipe, and once the water has flowed into the falling pipe with the sprinkler head attached, the water cannot escape from here. Therefore, it was necessary to remove the sprinkler head and then to drain the water in the pipe, which was more troublesome.

It is an object of the present invention to provide a pre-actuated sprinkler fire extinguishing system in which water does not flow into a pipe or a falling pipe even if the fire detector malfunctions or malfunctions during inspection.

[0014]

SUMMARY OF THE INVENTION The inventors of the present invention have made it possible to prevent a malfunction or fire detection at the time of inspection of a pre-operated sprinkler fire extinguishing facility by preventing the valve of the water flow detection device from opening even if only the fire detector operates. The present invention has been completed by paying attention to the fact that water does not flow into the pipe or the falling pipe even if the container malfunctions.

According to the present invention, a water supply pipe communicating with a water source is connected to the primary side of the flowing water detecting device, and a sprinkler head capable of emitting an electric signal at the time of operation is connected to the secondary side of the flowing water detecting device. A large number of attached pipes are connected, and a fire detector capable of detecting a fire and emitting an electrical signal is installed in the vicinity of the sprinkler head, and the valve body of the water flow detection device is a sprinkler head. Is a pre-actuated sprinkler fire extinguishing facility which is opened when both the electric signal of the fire alarm and the electric signal of the fire detector are emitted to spray water from the activated sprinkler head.

As the sprinkler head installed in the pre-actuated sprinkler fire extinguishing equipment of the present invention, any sprinkler head can be adopted as long as it can be turned on to emit an electrical signal. For example, Jitsuko Sho31-
14100, JP-A-2-209164, 3-28.
No. 0972 is suitable.

[0017]

Operation: The valve of the water flow detection device is designed to open only when both the electrical signal generated when the sprinkler head is activated and the electrical signal generated when the fire detector is activated enter the fire. Even if the detector malfunctions or the pre-operation type sprinkler fire extinguisher is erroneously operated during inspection, the valve of the water flow detection device will not open, and therefore water will not flow into the pipe or the falling pipe.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. FIG. 1 is a schematic view of a pre-operation type sprinkler fire extinguishing system of the present invention,
FIG. 2 is an enlarged cross-sectional view of a flowing water detection device used in the pre-operation type sprinkler fire extinguishing equipment of the present invention.

The inside of the main body 1 of the flowing water detecting device is divided into a primary side A and a secondary side B by a valve body 2. A water supply pipe 3 is connected to the primary side A, the end of the water supply pipe is immersed in the water of a water source 4, and a stop valve 5 and a pump 6 are connected in the middle thereof. Further, a pressure tank 7 and a pressure switch 8 are installed in the water supply pipe 3 between the pump 6 and the flowing water detection device body 1.

A pipe 9 extending to the indoor ceiling is connected to the secondary side B of the water flow detection device, and a large number of sprinkler heads S ... Are attached to the pipe. The sprinkler head used in the pre-actuated sprinkler fire extinguishing equipment of the present invention is such that when the sprinkler head operates, the switch installed in the sprinkler head becomes conductive and can emit an electrical signal. The conducting wire 10 of the switch installed on the sprinkler head S is connected to the control panel 11. The pre-operation type sprinkler fire extinguishing equipment of the present invention is a dry type that prevents the water in the pipe from flowing out even if the sprinkler head is destroyed by an external impact.

A fire detector K is attached near the sprinkler head S. The fire detector is a heat detector or a smoke detector, and is attached to one of the plurality of sprinkler head groups. Fire detector K lead wire 1
2 is connected to the control panel 11.

In a flowing water detecting device used in a pre-operation type sprinkler fire extinguishing equipment, a valve body 2 is installed in a main body 1, and the main body is divided by the valve body into a primary side A and a secondary side B. . The valve body 2 is of a check type, one end of which is rotatably attached to the secondary side of the main body so as to open and close the valve seat 13 on the primary side A.

A signal water intake port 14 is formed in the valve seat 13, and the signal water intake port is formed in the valve body 2 or the valve body when the valve body 2 closes the valve seat 13. It is designed to be closed by another valve body. The signal water intake port may be formed in the valve seat, or may be formed near the valve seat. The signal water intake port 14 communicates with the outside of the main body 1 and is connected to the operation alarm pressure switch 15 by a pipe.

Inside the main body 1, a lock device 16 is installed on the side opposite to the valve body mounting portion. The lock device 16 has a substantially V shape, and is rotatably attached to the main body 1 at a position slightly lower than the center. The lock device 16 prevents the valve body 2 from opening during normal times, and the valve body 2 seals the valve seat 13.

A push rod 18 which can freely move in and out from the outside of the main body 1 is in contact with the upper end of the lock device 16.
The push rod 18 is fixed to a piston 20 in a chamber 19 installed outside the main body 1.

The chamber 19 is provided with holes at two locations, and pipes 21 and 22 are connected to these holes, respectively. One pipe 21 communicates with the primary side A of the main body 1, and an orifice 23 is installed in the middle thereof. The pipe 21 introduces the pressure water on the primary side into the chamber 19, and the pressure water presses the piston 20 toward the main body in normal times. That is, when the piston 20 is on the main body side, the push rod 1 fixed to the piston 20
8 pushes the upper end of the lock device 16 in the middle direction, and the lock device 16 prevents the valve body 2 from opening. Pipe 2
The orifice 23 installed in the middle of 1 is the chamber 19
The amount of inflow of water into the inside is made smaller than the amount of outflow from a solenoid valve 26 described later, and when the solenoid valve is opened, the water pressure in the chamber is reduced to move the piston outward.

The other pipe 22 is provided with a pressure gauge 24 in the middle of the pipe, and the end of the pipe is divided into two parts, which are connected to a manual valve 25 and a solenoid valve 26, respectively.

On the secondary side of the main body 1, a hole communicating with the outside is bored, and is connected to the pressure reducing alarm pressure switch 27 by a pipe. When the sprinkler head breaks due to an external impact, the pressure on the secondary side of the water flow detection device sharply drops, and this pressure reduction alarm pressure switch senses this and reports.

The lead wire 28 of the pressure switch 15 for operation alarm,
Lead wire 29 of pump 6, lead wire 30 of pressure switch 27 for pressure reduction alarm, and lead wire 31 of pressure switch 8 of pressure tank
Are all connected to the control panel 11.

Next, the state of the sprinkler fire extinguishing equipment of the present invention when a fire occurs and in normal times will be described.

When a fire occurs, a fire detector K attached near the fire occurrence site detects it and sends an electrical signal to the control panel 11. In the conventional pre-actuated sprinkler fire extinguishing equipment, the valve body of the water flow detection device was opened only by an electrical signal from the fire detector to prepare for sprinkling, but the pre-actuated sprinkler fire extinguishing equipment of the present invention is The valve of the water flow detection device is not opened with a signal from the fire detector only.

Next, the sprinkler head S at the location of the fire is activated, the switch installed in the sprinkler head is turned on, and an electric signal is sent to the control panel 11. In the control panel 11, when the electrical signal from the fire detector sent earlier and the electrical signal from the sprinkler head sent later are aligned, the signal is sent to the solenoid valve 26 for the first time, and the solenoid valve 26 open.

When the solenoid valve 26 is opened, the water in the chamber 19 flows out from the solenoid valve 26, and the pressure in the chamber is reduced. Then, the piston 20 pushed by the water pressure on the primary side moves outward, and the push rod 18 also moves accordingly, so that the upper end of the lock device 16 is pulled back toward the wall surface of the main body, and the lock device 16 causes the valve body 2 to move. Then, the lock is released, and the valve body 2 is opened.

When the valve body 2 is opened, pressurized water flows in the main body, so a large amount of pressurized water flows in from the signal water intake port 14, and this water is used as an operation alarm pressure switch. Activate 15. The electric signal of the pressure switch for operation alarm is sent to the control panel 11 to issue an alarm such as a siren or a buzzer.

The pump 6 operates so that water with pressure reaches the sprinkler head from the water supply pipe 3 through the running water detection device 1 and the pipe 9, and a large amount of water is sprinkled from the activated sprinkler head.

Next, the normal state of the pre-operation type sprinkler fire extinguishing equipment of the present invention will be described.

During normal operation of the pre-actuated sprinkler fire extinguishing equipment of the present invention, pressurized water is filled up to the primary side A of the flowing water detection device, and compressed air is filled up on the secondary side B. Of course, the valve body 2 is sealed by the lock device 16 so that the water on the primary side does not flow into the secondary side.

In normal times, when the sprinkler head is destroyed by an external impact and compressed air escapes from the sprinkler head, the pressure on the secondary side of the flowing water detection device sharply drops. This pressure drop is detected by the pressure reducing alarm pressure switch 27 and sends a signal to the control panel 11. Then, in the control panel 11, a warning is given to indicate a decrease in the pressure on the secondary side, that is, an abnormality in the sprinkler head. By this alarm, it is possible to know that the sprinkler head is destroyed by an external impact. However, at this time, since it is not a fire, the fire detector K is not activated and no electric signal is sent from the fire detector to the control panel. Therefore, no signal for opening the solenoid valve 26 is sent from the control panel, and the lock device 16 does not open the valve body 2 of the flowing water detection device.

[0039]

As described above, the pre-operation type sprinkler fire extinguishing system of the present invention is not only provided with the safety that the sprinkler head is not sprinkled by an external impact but water is never sprinkled. Even if only the fire detector operates, the valve body of the water flow detector does not open, so even if the fire detector malfunctions or malfunctions during inspection, water will not flow into the piping or sprinkler head. Therefore, there is no need to drain water from the piping or sprinkler head after the fire detector is activated, which is excellent in simplicity.

[Brief description of drawings]

FIG. 1 is a schematic view of a pre-actuated sprinkler fire extinguishing facility of the present invention.

FIG. 2 is an enlarged cross-sectional view of a flowing water detection device used in a pre-operation type sprinkler fire extinguishing facility.

[Explanation of symbols]

 1 Water flow detector main body 2 Valve body 3 Water supply pipe 4 Water source 6 Pump 9 Piping 10 Sprinkler head lead wire 11 Control panel 12 Fire detector lead wire 13 Valve seat 14 Signal water intake port 15 Actuation alarm pressure switch 16 Lock device 18 Rod 19 chamber 20 piston 26 solenoid valve 27 pressure switch for decompression alarm S sprinkler head K fire detector

Claims (1)

[Claims] 1. A water supply pipe communicating with a water source is connected to the primary side of the flowing water detecting device, and a large number of sprinkler heads capable of emitting an electric signal during operation are attached to the secondary side of the flowing water detecting device. Connected to the sprinkler head, a fire detector is installed near the sprinkler head to detect a fire and generate an electrical signal. A pre-actuated sprinkler fire extinguishing facility, which is opened when both the electrical signal and the electrical signal of the fire detector are emitted to spray water from the activated sprinkler head.