JPH04276270A - Sprinkler fire extinguishing apparatus - Google Patents

Abstract

PURPOSE:To reliably announce the real operation of a fire extinguishing apparatus by detecting and announcing the ongoing fire extinguishing activity of a sprinkler head wherein fire extinguishing liquid is being fed from a fire extinguishing pump. CONSTITUTION:In a sprinkler fire extinguishing apparatus which branches into respective fire alarm districts from a water feed main pipe 12 connected to a fire extinguishing liquid supply means 11 and to which a plurality of sprinkler heads are connected via a district valve 6 of the fire alarm district, the fire extinguishing liquid supply means 11 has a fluid detection device F provided in a position on the secondary side of a fire pump 10 connected to the water feed main pipe 12.

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.

0002

[Prior Art] A closed sprinkler fire extinguishing system installed in a high-rise building such as a building supplies extinguishing liquid from a fire extinguishing liquid supply means such as a fire pump to each floor (warning area) of the building through a water main. Conventionally, automatic alarm valves (release valves) are provided as district valves at the branching portions to each floor, and a plurality of sprinkler heads are connected to the secondary side of the district valve. In a wet sprinkler fire extinguishing system, an increase in the amount of replenishment of fire extinguishing liquid when the sprinkler head is opened causes the valve element of the district valve to open, and this valve opening signal is used to notify this as an operation of the fire extinguishing system. Further, in a pre-actuation type sprinkler fire extinguishing system, as in the wet type, a pre-actuation valve is activated by a signal from a fire detector, and the valve opening signal is used as the operation of the fire extinguishing system.

0003

However, since the opening signal of the valve body of the pre-actuation valve does not necessarily indicate the operation of the fire extinguishing system, such conventional warning systems may cause confusion. In other words, in the pre-operation type, the pre-operation valve, which is a district valve, is opened by a signal from a fire detector, which is a fire alarm, and even though this valve opening signal detects the operation of the sprinkler head. do not have. In view of the above-mentioned problems with the conventional sprinkler fire extinguishing system, this invention attempts to detect and notify that fire extinguishing activities are being carried out by the sprinkler head by supplying extinguishing liquid from the fire extinguishing pump. The purpose is to reliably notify the true operation of the device.

0004

[Means for Solving the Problems] In order to solve the above-mentioned problems, the present invention has a system in which a water supply main 12 connected to a fire extinguishing liquid supply means 11 is branched to each warning area, and a water supply pipe is connected to the fire extinguishing liquid supply means 11 through a district valve 6 of the warning area. In the sprinkler fire extinguishing system to which a plurality of sprinkler heads 4 are connected, the extinguishing liquid supply means 11 has a configuration in which a flowing liquid detection device F is provided at a position on the secondary side of the fire pump 10 connected to the water supply main pipe 12. There is.

The liquid flow detection device F is constituted by an automatic alarm valve 13 of a check valve type.

[0006]

[Function] When the sprinkler head 4 is opened, a flowing liquid action is always generated on the secondary side of the fire pump 10.
The flowing liquid detection operation of the flowing liquid detection device F located here is to correctly notify the operation of the fire extinguishing system.

Since the automatic alarm valve 13 of the check valve type is used as the liquid flow detection device F, the liquid flow within the water supply main pipe 12 can be reliably detected with a simple configuration.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing one embodiment of the present invention, and the upper half of the figure shows a certain warning area and the fire detector 1, sprinkler head 4, and extinguishing liquid supply means 11 installed there. District valves 6 and the like provided branching off from the main water supply pipe 12 are shown, and the extinguishing fluid supply means 11 is shown in the lower half of the figure, respectively. A fire detector 1 such as a photoelectric type, an ionization type, a differential type, a constant temperature type, etc., as a fire detection means for detecting fire phenomena in a warning area is connected to a fire receiver 3 (installed at a disaster prevention center, etc.) via an electric line 2. )It is connected to the. Similar to the fire detector 1, a closed sprinkler head 4 installed on the ceiling of the warning area is connected via a secondary pipe 5 to the secondary side 7 of a district valve 6 installed on each floor of the building. District dialect 6
The primary side 8 is connected to a branch pipe 30 via a primary side pipe 9 and a primary side valve 10, and the branch pipe 30 is connected to a fire extinguishing pump 10 of a fire extinguishing liquid supply means 11 through a water supply main pipe 12.

[0009] On the secondary side of the fire pump 10, a check valve type automatic alarm valve 13 is installed in the water supply main pipe 12 as a flowing liquid detection device F.
This automatic alarm valve 13 is activated by a large liquid flow discharged from the sprinkler head 4 in the water supply main pipe 12, which opens a disk (not shown) and pressurizes the pressure chamber, and by actuation of a pressure switch (not shown). The structure is such that the fire receiver 3 is notified of the opening of the sprinkler head 4 via the electric line 31.

District valve 6 and starting valve 2 for opening it
4, a pressure regulating pilot valve 41 that reduces and adjusts the extinguishing fluid in the primary side piping 9 to a predetermined pressure suitable for extinguishing operation, and an electric remote control test valve 14 that opens the district valve 6 by remote control.
A parent-child valve 17 that combines a small-diameter test valve 15 capable of draining one sprinkler head 1 and a large-diameter test valve 16 capable of draining a plurality of sprinkler heads 1, and a secondary side 7 of a district valve 6. a pressure switch 32 that detects the hydraulic pressure of the
The piping connecting each valve such as the pressure regulating pilot valve 41 to the remote control test valve 14 and the pressure switch 32
A unit U is formed by collecting the electric lines 33 and a terminal box 34 connected to the fire receiver 3.

A hose 34 having a fire extinguishing nozzle is connected to the branch pipe 30 to serve as an auxiliary water tap 35, and a connecting water supply port 48 and a fire pump 10 are connected to the main water supply pipe 12 on the primary side of the automatic alarm valve 13. In order to avoid frequent activation of the main water supply pipe 12, the main water supply pipe 12 is connected to a pressurized air tank 49 for pressurizing the inside of the main water supply pipe 12. The fire extinguishing liquid supply means 11 includes a fire extinguishing liquid source 50 in addition to the fire pump 10.
and a priming device 52 that fills the fire extinguishing liquid into the fire extinguishing pump 10 and water suction pipe 51. Motor of fire pump 10
53 is an electric line 54, a water reduction alarm device 56 for notifying water reduction in the priming tank 55 is an electric line 57, and a pressure switch 58 for detecting the air pressure in the pressure air tank 49 is an electric line 59, all of which are connected to the pump starting panel 60. . The operation of the fire detector 1 is alerted by an alarm bell 61.

An example of the unit U used in the present invention is shown in FIG. The illustrated district valve 6 has a valve seat 18 that separates the primary side 8 and the secondary side 7 closed by a valve body 20 that is biased by a spring 19, and a piston 2 that is integrated with the valve body 20.
1 and the valve box form a cylinder 22, and this cylinder chamber 2
2 is connected to the primary side 8 by a piping 46 via a starter valve 24. The starting valve 24 is connected to the terminal box 3 by the electric circuit 17.
It is opened and closed by an electric part 35, such as a motor or an electromagnetic solenoid, connected to the fire receiver 3 via the fire receiver 3.

The illustrated pressure regulating pilot valve 41 introduces the hydraulic pressure on the secondary side 7 from the secondary side piping 5 into its operation chamber 37 through the piping 36, and the hydraulic pressure in the cylinder chamber 22 of the district valve 6 through the piping. 38 and a valve seat 39 to drain the liquid into a drain pipe 40. When the hydraulic pressure on the secondary side 7 introduced into the operation chamber 37 is lower than a predetermined pressure, the valve body 44 closes the valve seat 39 due to the pressure regulating action of the flamm 42 and the spring 43, and the pressure liquid in the cylinder chamber 22 is reduced. acts to suppress drainage to the drain pipe 40,
The introduction of the fire extinguishing liquid on the primary side 8 from the piping 46 into the cylinder chamber 22 via the starting valve 24 opens the district valve 6, and the pressure liquid on the secondary side 7 rises. When the hydraulic pressure on the secondary side 7 is higher than a predetermined pressure, the valve body 44 is opened by the pressure regulating action of the flamm 42 and the spring 43 to increase the drainage of the pressure liquid in the cylinder chamber 22 to the drain pipe 40. The district valve 6 is then closed, and in this way the hydraulic pressure on the secondary side 7 is adjusted to a predetermined pressure suitable for extinguishing the fire.

The illustrated remote control test valve 14 is opened and closed by a motorized part 63 such as a motor or an electromagnetic solenoid connected to the fire receiver 3 via the terminal box 34 by an electric line 62.
The size of the opening is set so that an amount of fire extinguishing liquid equivalent to one sprinkler head 4 is drained when the sprinkler head 4 is opened. The small-diameter test valve 15 configured using the example parent-child valves extinguishes an amount of extinguishing liquid equivalent to one sprinkler head 4, and the large-diameter test valve 16 extinguishes an amount equivalent to the amount of extinguishing fluid equivalent to multiple sprinkler heads 4. The sizes of the openings are set so that the liquid can be drained by opening the respective openings. Opening of the district valve 6 is detected by the pressure switch 32 provided in the piping 47 (instructed to the fire receiver 3 via the terminal box 34 by the electric line 64), and the remote control test valve 14, the small diameter test valve 15,
During a drainage test performed by opening one of the large-diameter test valves 16, it is checked whether the liquid pressure in the secondary pipe 5 is maintained at a predetermined pressure, and the operation of the fire extinguishing system is checked by checking the automatic alarm valve 1
This is confirmed by 3.

Next, the operation of this embodiment will be explained. First, the secondary side piping system such as the sprinkler head 4 and the secondary side piping 5 is filled with an unpressurized fire extinguishing liquid. That is, the primary side main valve 65 is opened, the extinguishing liquid is introduced into the primary side 8 by the extinguishing liquid supply means 11, the primary side main valve 65 is closed, and the starting valve 2 is introduced.
4 is opened to introduce the pressure fluid on the primary side 8 into the cylinder chamber 22 to make the district valve 6 openable, and then the primary side main valve 6 is opened.
5 is gradually opened to allow the extinguishing liquid to slowly flow into the secondary piping 5, the secondary piping 5 and the sprinkler head 4 are filled with unpressurized extinguishing liquid, and when the starting valve 24 is closed, the district valve 6 is closed.
is in a monitoring state.

In this state, when a fire occurs and the fire detector 1 is activated, a fire signal is transmitted to the fire receiver 3. In the fire receiver 3, this fire signal operates the electric part 35 to open the starting valve 24, and the extinguishing liquid on the primary side 8 is introduced into the cylinder chamber 22 of the district valve 6 via the piping 46 and the starting valve 24, and is pressurized. The piston 21 slowly moves the valve body 20 away from the valve seat 18, and the extinguishing liquid in the primary pipe 9 is gradually introduced into the secondary pipe 5. Since the pressure inside the secondary side piping 5 is already at the monitored pressure, abnormal pressure rise (water hammer phenomenon) occurs due to high pressure extinguishing liquid flowing into the secondary side piping 5 at once when the district valve 6 is opened. is prevented. The pressure switch 32 detects that the pressure inside the secondary pipe 5 reaches a predetermined pressure due to the action of the pressure regulating pilot valve 41 when the district valve 6 is opened in response to a fire signal, and the fire receiver 3 detects that a fire has occurred in this warning district. It is notified and the alarm bell 61 rings.

Afterward, including during firefighting operations, the introduction of the extinguishing liquid into the secondary pipe 5 is controlled by opening and closing the valve body 44 of the pressure regulating pilot valve 41, and the pressure is adjusted to be reduced to a predetermined pressure. That is, when the hydraulic pressure in the operation chamber 37 is lower than a predetermined pressure, the valve body 44 closes the valve seat 39 due to the pressure regulating action of the flam 42 and the spring 43, and the pressure liquid in the cylinder chamber 22 flows to the drain pipe 40. The district valve 6 is opened by introducing fire extinguishing liquid from the pipe 46 into the cylinder chamber 22, and when the liquid pressure on the secondary side 7 is higher than a predetermined pressure, the flam 42 and spring 43 are adjusted. The valve body 44 is closed by the pressure action, increasing the amount of pressure fluid in the cylinder chamber 22 drained to the drain pipe 40, the district valve 6 is closed, and the inside of the secondary pipe 5 is maintained at a predetermined pressure.

When the temperature at the fire point further increases, the sprinkler head 4 opens and the extinguishing liquid in the secondary pipe 5 is released, creating a liquid flow in the water supply main pipe 12, which causes the automatic alarm valve to be activated. The unillustrated disk 13 is opened to pressurize the pressure chamber, and the operation of the unillustrated pressure switch notifies the fire receiver 3 via the electric line 31 of the opening of the sprinkler head 4 and the start of operation of the fire extinguishing system. fire receiver 3
Now, by detecting the opening of the district valve 6 by the pressure switch 32, the occurrence of a fire in the warning area shown in Figure 1 is notified, so the fire receiver 3 correctly displays the fire extinguishing activity in the warning area shown in Figure 1. do. Since the hydraulic pressure in the secondary piping 5 is regulated by the pressure regulating pilot valve 41, the pressure switch 32 that detects the hydraulic pressure in the secondary piping 5 is activated when the sprinkler head 4 is opened. It is not possible to detect a decrease in pressure in the area, and only the opening of the district valve 6 due to a fire signal can be detected. In this way, since it is determined that the fire extinguishing system is operating by detecting the liquid flow in the water supply main pipe 12, only the opening operation of the sprinkler head 4 can be accurately notified. and,
Temporarily, the alarm bell 61 and pressure switch 3 on each floor (warning area)
Even if there is a problem with the open detection and notification function of the district valve 6 by 2, the liquid flowing from the water main 12 will be reliably detected by the automatic alarm valve 13. It can be displayed correctly in 3rd place.

Furthermore, according to this embodiment, the secondary side piping 5
Since the high liquid pressure in the primary side piping 9 is sufficiently reduced by the pressure regulating pilot valve 41, the fire extinguishing operation is carried out effectively and the pressure resistance of the equipment components of the secondary side piping system is reduced. - The sprinkler fire extinguishing system can be achieved with a sufficiently low pressure, without causing damage to equipment components due to high-pressure liquid as in conventional systems, and which can also reduce equipment costs. Note that during fire monitoring, when the sprinkler head 4 opens due to an impact or the like, only a small amount of low-pressure extinguishing liquid is released. In addition to the above, this embodiment does not require a compressor to constantly pressurize the secondary piping 5 with air like a pre-actuating type.
Equipment costs will be low.

Further, in this embodiment, since the district valve 6, the remote control test valve 14, the pressure regulating pilot valve 41, etc. are used as the unit U, these functional tests are conducted using a test stand (not shown) before on-site construction. be able to. That is, the test water pump is connected to the primary side piping 9 of the unit U, the secondary side piping 5 is plugged with a blind plug, etc., and the terminal box 34 is connected to the connector of the fire receiver on the test stand using a connector (not shown). When the pressure reducing liquid is operated by the pressure regulating pilot valve 41, when the small diameter test valve 15 is opened to release fire extinguishing fluid for one sprinkler head, or when the large diameter test valve 16 is opened and a plurality of sprinkler heads 4 are discharged. When extinguishing liquid is released,
The pressure switch 32 determines whether the liquid pressure in the secondary piping 5 is maintained at a predetermined pressure, and the fire receiver 3 determines whether the starting valve 24 is maintained at a predetermined level.
By opening the remote control test valve 14 using an electric signal, it is possible to confirm in advance that the operation of the district valve 6 can be remotely inspected using a signal from the pressure switch 32. In this way, since the main components of the sprinkler fire extinguishing system, such as the district valve 6 and the pressure regulating pilot valve 41, are made into the unit U, the piping wiring work, function test, and adjustment work around the unit U can be easily and easily performed before on-site construction. Not only can it be carried out accurately, but only a small amount of on-site work is required to connect the unit U to the on-site piping and wiring at the construction site, resulting in labor savings. The embodiment of the present invention is not limited to the above-mentioned example, but is particularly effective in a fire extinguishing system that opens a district valve 6 based on a signal from a fire detection means such as a fire detector 1. pump 1
The operation of 0 etc. can be confirmed accurately. In addition, the flowing liquid detection device F
Needless to say, in addition to the illustrated example, various configurations capable of detecting flowing liquid, such as a butterfly type valve, can be used.

[0021]

As described above, according to the present invention, when the sprinkler head 4 is opened, a liquid flow action is always generated on the secondary side of the fire pump 10, so that the liquid flow detection device located here The flowing liquid detection operation of F can accurately notify the operation of the fire extinguishing system, and there is no longer a need to notify the operation of the fire extinguishing system by opening the district valve 6 due to a fire signal.

Since the automatic alarm valve 13 of the non-return valve type is used as the flowing liquid detection device F, the flowing liquid in the water supply main pipe 12 can be reliably detected with a simple configuration, and the secondary side piping 5 can be detected. There is no inconvenience that fluid pressure fluctuations flow back into the fire pump 10 or the like.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the invention.

FIG. 2 is a block diagram showing details of the unit in FIG. 1;

[Explanation of symbols]

Claims (2)

[Claims] 1. A sprinkler fire extinguishing system in which a water supply main connected to a fire extinguishing liquid supply means branches into each warning area, and a plurality of sprinkler heads are connected to each warning area via a district valve of the warning area, the fire extinguishing liquid supply means comprising: A sprinkler fire extinguishing system characterized in that a flowing liquid detection device is provided at a position on the secondary side of a fire extinguishing pump connected to a water main. 2. The sprinkler fire extinguishing system according to claim 1, wherein the liquid flow detection device is a check valve type automatic alarm valve.