JP2008253299A - Sprinkler fire-extinguishing equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve fire-extinguishing performance without increasing a cost in home sprinkler fire-extinguishing equipment. <P>SOLUTION: In the sprinkler fire-extinguishing equipment connected to a city water pipe 3, and having a secondary-side pipe 4 connected with a sprinkler head, the base end side of the secondary pipe is connected with a tank 14 connected via a check valve 12 and an on-off valve 17. The inside of the tank 14 contains fire extinguishant and is pressurized by a compressor 16. A wireless fire alarm 23 is provided in a room provided with the sprinkler head and, when the fire alarm is actuated, the on-off valve is opened. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a sprinkler fire extinguishing facility using tap water.

  Conventionally, sprinkler fire extinguishing equipment has been installed in buildings such as general buildings. Usually, in the initial stage of a fire, a large amount of water is discharged, so that the spread of the fire can be suppressed and reignition can be prevented. From this point of view, in general sprinkler fire extinguishing equipment, the number of revolutions is controlled using an inverter for the pump, and the water discharge amount is controlled based on the analog signal of the fire detector of the automatic fire alarm equipment. Or by using an on-off valve whose degree of opening can be controlled to increase the water discharge amount in the initial stage and then reduce the water discharge amount to improve the fire extinguishing performance. Yes.

On the other hand, as a sprinkler fire extinguishing equipment for home use, there is a sprinkler fire extinguishing equipment using tap water from a water main as a water source (see Patent Document 1).
Real Open Hei 5-74554

  This household sprinkler fire extinguishing equipment employs a direct water supply system, and the water discharge capacity of the equipment is determined by the water supply capacity. Usually, the water pressure of tap water is 0.2 to 0.3 MPa, and the fire extinguishing performance is inferior compared to the sprinkler fire extinguishing equipment for general buildings due to the low water pressure. In addition, because of household equipment, the above-described pumps and on-off valves are rarely installed due to cost.

  Therefore, an object of the present invention is to improve fire extinguishing performance in a household sprinkler fire extinguishing equipment without cost.

  The present invention relates to a sprinkler fire extinguishing equipment that is connected to a water supply pipe and has a secondary side pipe to which a sprinkler head is connected, connected to the base end side of the secondary side pipe via a valve, and contains a fire extinguishing agent inside. And a compressor that is connected to the tank and pressurizes the inside of the tank.

  The present invention is provided with a tank containing a fire extinguishing agent inside, at the base end side of the secondary side pipe connected to the water pipe, and the inside of the tank is pressurized by the compressor, so when the sprinkler head operates, The fire extinguisher in the tank is released from the head in a short time. For this reason, it becomes possible to temporarily increase the flow rate in the initial stage of the fire. Moreover, since only a compressor and a tank are required as equipment, it can be installed in the home without cost.

  In addition, since a wireless fire alarm is provided in the room and the valve is opened when the fire alarm is activated, water loss due to the expulsion of the head can be prevented. Since this fire alarm is a wireless type, it is not necessary to lay a signal line like a fire detector of a general automatic fire alarm facility, and it can be provided at home at low cost.

Embodiment 1
FIG. 1 is a system diagram of the fire extinguishing equipment of the present invention. In the figure, 1 is a public water supply pipe as a water supply source. 2 is a check valve. With this check valve 2 as a reference, a water pipe 3 as a primary side pipe is connected to the primary side, and a sprinkler pipe as a secondary side pipe 4 is connected to the secondary side.

  A water pipe 3 provided between the public water supply pipe 1 and the check valve 2 is provided with a water stop valve 6, a water meter 7, and the like. A life pipe 9 is branched from between the check valve 2 and the water meter 7 and is connected to a general water supply device (not shown).

  A plurality of sprinkler heads 11 are connected to the secondary side pipe 4 provided on the secondary side of the check valve 2. The inside of the secondary side pipe 4 is always filled with tap water.

    A branch pipe 13 is connected to the base end side of the secondary pipe 4 (primary side of the sprinkler head) via a check valve 12. This branch pipe 13 is provided in a tank 14 containing water therein. A household compressor 16 as a pressurizing source is connected to the tank 14, and the inside of the tank 14 is pressurized by the compressor 16. The tank 14 is higher than the water pressure of tap water, and is pressurized to 0.7 MPa, for example. The tank 14 is provided with a pressure gauge (not shown), and when the pressure drops, the compressor 16 is started manually or automatically and pressurized to a predetermined pressure of 0.7 MPa.

  Here, the check valve 12 is provided in such a direction that the water in the tank 14 flows only through the branch pipe 13 to the secondary pipe 4 side. The water in the tank 14 may be replaced with a liquid fire extinguisher. Since the present invention is a simple facility in which only a home compressor 16 and a tank 14 are added to a normal home sprinkler fire extinguishing facility, the present invention can be installed in the home without cost.

  The branch pipe 13 is always provided with an open / close valve 17 that is open. This on-off valve 17 is opened and closed by a signal from a control panel (not shown), and is interlocked with the use of a water tap 18 provided at the end of the secondary side pipe 4. That is, when the faucet 18 is opened to use the faucet 18, the on-off valve 17 is controlled to be closed by a signal from the control panel. In sprinkler fire extinguishing equipment using tap water, it is necessary to prevent tap water from stagnation in the pipe by appropriately opening the water tap 18 provided at the end of the secondary pipe 4. However, when the water tap 18 is opened, the water in the tank 14 is discharged. To prevent this, when the water tap 18 is used, the on-off valve 17 is closed in conjunction with the water in the tank 14. The water is not discharged.

  Next, operation | movement of the system of the sprinkler fire extinguishing equipment of this invention is demonstrated using FIG. First, when a fire occurs in the protection area where the sprinkler head 11 is installed and the sprinkler head 11 is opened by the heat at the time of the fire, the water charged in the secondary side pipe 4 is discharged from the sprinkler head 11. The

  By opening the sprinkler head 11, the pressurized water in the tank 14 is pushed out to the secondary pipe 4 through the branch pipe 13, the check valve 12 and the on-off valve 17, and the pressure in the tank 14 is increased. Thus, the water in the tank 14 is discharged from the sprinkler head 11 that has been operated in a short time under the influence of pressure. For this reason, it becomes possible to increase temporarily the flow volume in the initial stage of a fire, and it becomes possible to improve fire extinguishing performance.

  If the room to be protected has different risks, the number of heads to be opened is expected to increase in a room with a high risk and a large number of installed heads. .

  Subsequently, in the first embodiment, the capacity of the tank 14 is set to 100 L (liter), 80 L of water is added, the remaining 20 L is pressurized air, and the compressor 16 is pressurized to 0.7 MPa. Use and explain.

  Table 1 shows the pressure in the tank 14 and the flow rate from the head 11 based on the elapsed time from the time when the sprinkler head 11 is operated.

  When the sprinkler head 11 is not operating, that is, when the elapsed time is 0 second, the pressure in the tank 14 is maintained at 0.7 MPa, and the flow rate (L / min) from the head 11 is 0. is there. Here, when the sprinkler head 11 is operated, the pressure in the tank 14 is high at a time when not much time has passed, that is, from 0 to 15 seconds. From the sprinkler head 11, the pressure is 60 L / min or more. Water is discharged at a flow rate of.

  After 15 seconds, as the pressure in the tank 14 decreases, the flow rate from the head also decreases. When about 30 seconds have elapsed, the pressure in the tank is 0.27 MPa. The result was that the flow rate from the head 11 was almost settled at 49 L / min. FIG. 3 is a graph of the results shown in Table 1. The pressure in the tank 14 and the amount of water discharged from the head gradually decrease. Finally, the pressure in the tank 14 Equal to water pressure.

Embodiment 2
The secondary pipe 4 and the household pipe 9 may be blocked as shown in FIG. 2 so that the water in the secondary pipe 4 does not enter the domestic pipe 9. FIG. 2 is a system diagram from the water meter 7 to the check valve 2. In FIG. 2, a three-way valve 20 is provided on the secondary side of the water meter 7. The three-way valve 20 normally closes the household pipe 9 side (water pipe 3) and the secondary pipe 4 and allows the secondary pipe 4 and the drain pipe 21 to communicate with each other. For this reason, when there is water on the primary side of the check valve 2, the water is drained from the drain pipe 21 without flowing into the household pipe 9 side.

The three-way valve 20 is opened when a fire alarm 23 installed in a room where the sprinkler head 11 is provided detects a fire. Specifically, the fire alarm 23 is a wireless fire alarm and can be easily installed anywhere in the room. The fire alarm device 23 wirelessly transmits a fire signal to the control panel 24 when a fire is detected. When receiving the fire signal, the control panel 24 controls the three-way valve 20 to open, and connects the secondary side pipe 4 and the water pipe 3 to supply water. In such a system, there is no problem even if water stagnates in the secondary side pipe 4, so the water tap 18 and the on-off valve 17 of the first embodiment are not necessary.
Embodiment 3
In the first embodiment, instead of the check valve 12 and the on-off valve 17, these valves may be combined into one, and an on-off valve that is normally closed and opened by a fire signal may be provided. In this case, as the fire detector, the wireless fire alarm 23 described in the second embodiment may be used, and when the on / off valve is opened when the fire alarm 23 operates, the head The water loss caused by the discharge of the water in the tank 14 can be prevented.

  If a wireless alarm is used as the fire alarm, it is not necessary to install a signal line, and it can be provided at low cost in the home.

Embodiment 4
In the present embodiment, a compressor is used as a means for increasing the pressure of tap water, and the flow rate at the initial stage of the fire is increased, but a small pump is provided in the secondary side pipe, which is started in the event of a fire, You may make it raise a tap water pressure.

FIG. 1 is a system diagram of a fire extinguishing facility according to the first embodiment. FIG. 2 is a system diagram of the fire extinguishing facility according to the second embodiment. It is a graph of the discharge flow rate with time passage when using a tank.

Explanation of symbols

1 public water supply pipe, 2 check valve, 3 water pipe,
4 Secondary piping, 6 Water stop valve, 7 Water meter,
9 Life piping, 11 Sprinkler head,
12 check valves, 13 branch pipes, 14 tanks,
16 compressor, 17 on-off valve, 20 three-way valve,
21 drainage pipe, 23 fire alarm, tt 24 control panel,

Claims (3)

In sprinkler fire extinguishing equipment with secondary pipe connected to water pipe and connected to sprinkler head,
A tank connected to the base end side of the secondary side pipe via a valve and containing a fire extinguishing agent inside;
A sprinkler fire extinguishing system comprising a compressor connected to the tank and pressurizing the inside of the tank. The sprinkler fire extinguishing equipment according to claim 1, wherein a wireless fire alarm is provided in a room in which the sprinkler head is provided, and the valve is opened when the fire alarm operates. A branch pipe connected to the base end side of the secondary side pipe and provided in the tank; and a water tap provided at an end of the secondary side pipe,
2. The sprinkler fire extinguishing equipment according to claim 1, wherein the branch pipe is provided with an on-off valve that closes in conjunction with use of the water tap.

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