JPH07108068A - Initial fire extingushing device by booster pump in sprinkler fire extinguishing facility - Google Patents

Abstract

PURPOSE:To continuously supply fire extinguishing water at once, when a sprinkler head is operated and opened in a multistoried building, to surely perform initial extinguishment. CONSTITUTION:Water tanks 21-23 and pumps 51-53 are provided on each of a plurality of blocks 11-13 formed by partitioning a multistoried building 10 into a plurality of floor units, branched pipes 41-46 having sprinkler heads 70 connected thereto, and zone valve devices 81-86 are provided on each of the floors, and on the basis of a flowing water signal outputted from the zone valve device, a control board 91 starts the pump of the block to which this zone valve device belongs.

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, and more particularly to an initial fire extinguishing system using a booster pump of the sprinkler extinguishing system suitable for high-rise buildings.

[0002]

2. Description of the Related Art In conventional sprinkler fire extinguishing equipment, a water tank as a water source for fire extinguishing is provided underground,
The main pump operates to supply fire extinguishing water from the water supply source to the sprinkler head operated by the fire through the main water supply pipe and the branch pipe provided for each floor so that the water is discharged. By the way, in a high-rise building, the height of fire-fighting water is high, and it is not possible to supply the fire-fighting water to the high-rise floors at a pressure necessary for fire-fighting only by the main pump provided near the water tank. For this reason, an auxiliary pump is installed, for example, on every 10th floor, in the middle of the main water supply pipe that passes through the high-rise building vertically.
With this auxiliary pump, the reduced water pressure is increased to the water pressure required for fire extinguishing and is supplied to the upper floors.
Then, when a fire broke out on the upper floors and the sprinkler head operated and opened, the main pump first operated to supply the water for fire extinguishing from the water tank to the main water supply pipe, and this fire extinguishing water reached the first-stage auxiliary pump. At that time, operate the first stage auxiliary pump,
As a result, when the water for extinguishing fire reaches the auxiliary pump of the next stage, the auxiliary pump of the next stage is operated to supply water to the opened sprinkler head while preventing idling of the auxiliary pump.

[0003]

As described above, in the conventional sprinkler fire extinguishing system, the main pump and the auxiliary pump provided in the middle of the main water supply pipe are sequentially activated from the lower side by shifting the time from below. Even if the head operates due to a fire and opens, it takes time until the water for fire extinguishing is supplied, and there is a problem that the initial fire extinguishing effective for extinguishing fire is delayed. The present invention has been made to solve such a problem, and when the sprinkler head operates and opens in a high-rise building, the fire extinguishing water can be immediately continuously supplied to surely perform the initial fire extinguishing. The purpose is to obtain sprinkler fire extinguishing equipment.

[0004]

The invention according to claim 1 is
A water tank provided in each of a plurality of blocks that divide the building into a plurality of floors, a branch pipe provided in each of the plurality of floors, and a branch pipe to which a number of sprinkler heads are connected, and each of the blocks are provided. , A pump for supplying the fire extinguishing water stored in the water tank of the block to the branch pipe of the block through the main water supply pipe, and each of the branch pipes, which is provided respectively, detects the running water of the branch pipe and outputs a running water signal. It is provided with a district valve device for outputting and a pump control circuit for activating a pump of a block to which the district valve device belongs, based on the flowing water signal outputted from the district valve device.

The invention according to claim 2 is provided in each of the water tanks of the blocks excluding at least the lowermost block among the plurality of blocks, and the water level is detected by detecting that the stored water amount of the water tank has dropped to a predetermined water level. A water level gauge that outputs a drop signal, and a pump sequential control circuit that starts a pump in a block below the block in which the water level gauge is provided based on the water level drop signal output from the water level gauge. is there.

According to a third aspect of the present invention, a pump drive monitoring circuit that outputs a water level lowering signal by determining that the pump has been continuously driven for a predetermined time, and the water level lowering signal output from the pump drive monitoring circuit. On the basis of the above, another pump sequential control circuit for activating the pump of the block below the block is provided.

The invention according to claim 4 is connected to a water pipe provided in each water tank and arranged in a building, and when the water level in the water tank is lowered, water for extinguishing fire is supplied from the water pipe to the water tank. It is equipped with an automatic water injection device for water injection.

[0008]

According to the invention of claim 1, when the sprinkler head connected to a branch pipe of a certain floor in one of a plurality of blocks obtained by dividing a building into units of a plurality of floors operates due to a fire and is opened, Fire extinguishing water in the branch pipe is discharged. When the district valve device on the certain floor detects the running water in the branch pipe due to the start of the water discharge and outputs a running water signal, the pump control circuit receiving the running water signal activates the pump of the one block, and the one block. The water for extinguishing a fire for a predetermined time necessary for extinguishing the fire is supplied to the branch pipe and then the sprinkler head through the main water supply pipe.

According to the second aspect of the present invention, when the water level detector detects that the water storage amount of the water tanks of the blocks excluding at least the lowermost block among the plurality of blocks has decreased to a predetermined water level, a water level decrease signal is output. The pump sequential control circuit which receives the water level lowering signal activates the pumps in the blocks below the block.

According to the third aspect of the present invention, when the pump drive monitoring circuit determines that the driving of the pump of a certain block has continued for a predetermined time and outputs a water level lowering signal, the other pumps that have received this water level lowering signal sequentially. The control circuit activates the pump in the block below the certain block.

According to the fourth aspect of the present invention, when the water level in the water tank is lowered, the automatic water injection device injects fire extinguishing water into the water tank from a water pipe arranged in the building.

[0012]

1 is a system diagram showing an embodiment of a sprinkler fire extinguishing facility according to the present invention. In FIG. 1, 10
Is a building, for example, a high-rise building, and is composed of a low-rise block 11, a middle-rise block 12 and a high-rise block 13 which are divided into a plurality of floor units, for example, every eighth floor. Reference numeral 21 is a low-rise block 11, which is a first aquarium having a water storage capacity of, for example, 50 m3, and 22,23 are respectively provided in a middle-rise block 12 and a high-rise block 13, and have a water storage capacity of, for example, 8 m3. The second and third aquariums. Reference numerals 24 and 25 are, for example, float type water level gauges provided in the second and third water tanks 22 and 23, respectively.

Reference numeral 31 is a main water supply pipe for fire extinguishing provided vertically through the high-rise building 10. One end of the main water supply pipe is put in the first water tank 21. 32 to 34 are check valves provided in the main water supply pipe 31 for each of the blocks 11 to 13, and 35.
Is a pressure air tank connected to the main water supply pipe 31 in the lower block 11 and has a pressure switch 35a. Reference numerals 41 to 46 are branch pipes provided by branching from the main water supply pipe 31 for each floor. Reference numeral 51 is a first pump provided in the lower layer block 11 for supplying the water for fire extinguishing of the first water tank 21 to the main water supply pipe 31, and 52 is a second pump inserted in the main water supply pipe 31 of the middle layer block 12. , 53 is a third pump inserted into the main water supply pipe 31 of the high-rise block 13, and includes a first water tank 21 and first to third pumps 51 to 51.
53 is connected in series via the main water supply pipe 31. Although not shown, each of the pumps 51 to 53 has so-called equipment around the pump, for example, necessary equipment such as a priming tank and a starting board.

Reference numeral 61 is a second water tank 22 and a second pump 52.
Is a water suction pipe connecting to the primary side of the
It is a water absorption pipe that connects the water tank 23 and the primary side of the third pump 53. Reference numeral 63 is a check valve provided in the middle of the water intake pipe 61 for preventing the fire extinguishing water of the main water supply pipe 31 from flowing into the second water tank 22, and 64 is the main water supply pipe 31.
Is a check valve provided in the middle of the water suction pipe 62 for preventing the fire extinguishing water from flowing into the third water tank 23. 70
Is an NS head which is connected to each of the branch pipes 41 to 46 through a branch pipe (no reference sign), for example, a closed type sprinkler head with high sensitivity (fast-acting type) and a small amount of water, and 81 to 86 are each branch pipe. A detector interlocking type NS valve as a regional valve device provided on the base end side of 41 to 46, for example, a water flow detecting device 81a to 86a, and a pressure regulating valve (not shown) for keeping the secondary side pressure at a predetermined pressure. , A test valve (not shown), a sensor-operated start valve (not shown), and the like. Reference numeral 91 is a control panel which is arranged in the lower block 11 and which will be described later in detail. Reference numeral 100 is a water pipe arranged in the high-rise building 10, and 101 to 103 are float valves for automatic water injection provided between the water pipe 100 and the first to third water tanks 21 to 23. .

The sprinkler fire extinguishing equipment of the present invention is constructed as described above, and its operation will be described in detail below. When the NS head 70 connected to, for example, the branch pipe 46 of the high-rise block 13 operates due to a fire and is opened, the branch pipe is pressurized by the pressure air tank 35 and regulated to a predetermined pressure by the NS valve 86. Water for extinguishing pressure in 46 is discharged from the NS head 70. The running water in the branch pipe 46 due to the start of the water discharge is immediately detected by the running water detection device 86a of the NS valve 86, and a running water signal is output to the control panel 91. The control panel 91 outputs a start signal to the third pump 53 and displays that a fire has occurred and water is being discharged in the area (floor) where the branch pipe 46 is provided. This makes the third
The pump 53 operates to absorb the water for extinguishing the fire in the third water tank 23 through the water absorption pipe 62, supply the water to the opened NS head 70 through the main water supply pipe 31 and the branch pipe 46, and discharge the water. On the other hand, when a fire occurs in the low-rise block 11, and, for example, the NS head 70 connected to the branch pipe 42 operates to open the plug and start discharging water, the running water detection device 8 of the NS valve 82.
2a operates and outputs a running water signal to the control panel 91. The control panel 91 outputs a start signal to the first pump 51 in response to a running water signal from the district valve device 82. As a result, the first pump 51 operates to supply the fire extinguishing water in the first water tank 21 to the opened NS head 70 through the main water supply pipe 31 and the branch pipe 42 and discharge the water.

As described above, when the NS head 70 in a block 11, 12 or 13 is opened, the pumps 51, 52 or 53 provided in that block are operated immediately and the water tanks 21, 22 or 22 in that block are opened. Since the fire extinguishing water 23 is supplied to the NS head 70 that has been opened, stable fire extinguishing water is discharged at the same time as the opening, and initial fire extinguishment becomes possible.

By the way, when the water for fire extinguishing in the third water tank 23 is lowered to a predetermined water level, for example, half of the normal level, by continuing the water discharge by the NS head 70 of the high-rise block 13,
The water level gauge 25 operates and outputs a water level drop signal to the control panel 91. When the water level drop signal is input from the water level gauge 25, the control panel 91 outputs a start signal to the second pump 52 to operate the second pump 52. This second pump 5
By the operation of 2, the fire extinguishing water in the second water tank 22 is pressurized and supplied to the primary side of the third pump 53. As a result,
Since the pressure on the secondary side (main water supply pipe 31 side) of the check valve 64 increases due to the pressure on the primary side (third water tank 22 side),
The pump 53 of the second water tank 22 is not the water for extinguishing the fire from the third water tank 23, but the water for extinguishing the fire of the second water tank 22, which is supplied by the second pump 52, is opened through the branch pipe 46 to the NS.
The water is supplied to the head 70 and discharged. When the water for extinguishing fire in the second water tank 22 is reduced to, for example, half, the water level gauge 2
4 outputs a water level lowering signal to the control panel 91. Control panel 91
Outputs an activation signal to the first pump 51 to operate it, and supplies the fire extinguishing water in the first water tank 21 to the second pump 52 via the main supply pipe 31. This second pump is the first pump 51 instead of the fire extinguishing water in the second water tank 22.
The water for extinguishing the fire in the first water tank 21 supplied from the above is pumped to the third pump 53 and discharged from the opened NS head 70.

In this way, when a fire occurs in the high-rise block 13, first, the third pump 53 operates to extinguish the fire using the third water tank 23 as the main water tank, and the water for extinguishing the water in the third water tank 23 is discharged. When, for example, the water level is reduced to half of the initial level, the second pump 52 operates to supply the fire extinguishing water in the second water tank 22 to the third pump 53, and thereafter, the second pump 52 is used.
Water discharge for fire extinguishing is continued using the water tank 22 of No. 2 as an auxiliary water source. Further, when the water for extinguishing fire in the second water tank 22 is reduced to, for example, half, the first pump 51 also operates to supply the water for extinguishing fire in the first water tank 21 to the third pump via the second pump 52. The water discharge is continued using the first water tank 21 as an auxiliary water source. Therefore, stable water discharge is started with the opening of the NS head 70, and stable supply of fire-extinguishing water to the NS head 70 is performed without interruption even when the water supply source is switched. . In addition, by preparing a sufficient amount of water in the first water tank 21,
Even if the water tank 22 and the third water tank 23 are small in size, water can be discharged for a long time. When the NS head 70 is opened in the block 12 in the middle layer, first, the second pump 52 operates to discharge water by using the second water tank 22 as a main water source, and the water level in the second water tank 22 is set to a predetermined level. When the water level is lowered, the first pump 51 operates to continue discharging water using the first water tank as an auxiliary water source.

FIG. 2 is a circuit diagram showing an example of the control circuit 92 provided on the control panel 91 in FIG. In FIG.
TM2 is a first timer circuit which starts its operation when an in-operation signal from the second pump 52 is input and produces an output after, for example, 5 minutes. Similarly, TM3 is an in-operation signal from the third pump 53. It is a second timer circuit which starts operation by an input and produces an output after 5 minutes. PD1 to PD
Reference numerals 3 are first to third pump start-up circuits that output start-up signals to the first to third pumps 51 to 53, respectively. OR1
1 to OR 13 are NSs provided in the lower block 11
Water flow signals from the water flow detectors 81a and 82a of the valves 81 and 82, water flow signals from the water flow detectors 83a and 84a of the NS valves 83 and 84 provided in the middle block 12, respectively, and the high flow block 13 NS valve 8
First and second as flowing water signal input circuits to which flowing water signals from the flowing water detecting devices 85a and 86a are input.
It is a third OR circuit. LT1 to LT3 are first to third latch circuits. RSW is the latch circuit L
It is a water discharge stop switch that restores T1 to LT3.

Further, AND1 is the first timer circuit TM2.
Is a first AND circuit that takes the logical product of the output of the second pump 52 and the in-starting signal from the second pump 52, and similarly AND2 is the second
It is a second AND circuit that takes the logical product of the output of the timer circuit TM3 and the starting signal from the third pump 53. O
R21 is the output of the first AND circuit AND1 and the water level gauge 24
Is a fourth OR circuit that takes the logical sum of the water level drop signal from the OR circuit and the output of the first OR circuit OR11.
Is a fifth OR circuit that takes the logical sum of the output of the second AND circuit AND2, the water level drop signal from the water level gauge 25, and the output of the second OR circuit OR12. Also, OR31 is the fourth
Output of the first latch circuit LT1 connected to the output side of the OR circuit OR21 and the pressure switch 35 of the pressure air tank 35.
It is a sixth OR circuit that takes a logical sum with the pressure drop signal from a. The output side of the sixth OR circuit OR31 is connected to the input side of the first pump starting circuit PD1 and
The latch circuit LT2 is connected between the output side of the fifth OR circuit 22 and the input side of the second pump starting circuit PD2.
Similarly, the third latch circuit LT3 is connected to the third OR circuit OR1.
3 is connected between the output side and the input side of the third pump starting circuit PD3.

The control circuit 92 of the control panel 91 is constructed as described above, and by opening the NS head 70 connected to the branch pipe 46 as described above, the pressure in the pressure air tank 35 decreases, and When the pressure switch 35 detects this and inputs the pressure drop signal to the control circuit 92, while the pressure drop signal is being input, the first pump starting circuit PD
1 outputs a start signal to operate the first pump 51,
Therefore, the pressure of the main water supply pipe 31 is restored. When a running water signal is input from the running water detection device 86a of the NS valve 86, the third
Of the OR circuit OR13 of the third latch circuit L13
T3 latches its output and the third pump starter circuit PD
3 outputs a start signal to the third pump 53. As a result, the third pump 53 operates and outputs the operating signal to the control circuit 92. The second timer circuit TM3 starts timing by this operating signal. And the second timer circuit T
When M3 produces an output after a predetermined time, for example, 5 minutes, and the second AND circuit AND2 produces an output, or when a water level drop signal is input from the water level gauge 25, the second latch circuit LT2 outputs the fifth signal. The output of the OR circuit OR22 is latched and the second pump starting circuit PD2 outputs a starting signal to the second pump 52. As a result, the second pump 52 starts its operation and outputs an in-operation signal. The first timer circuit TM2 starts timing by this operating signal. Then, the first timer circuit TM2 produces an output after a predetermined time, for example, 5 minutes, and the first AND circuit AND1
Or the water level drop signal is input from the water level gauge 24, the first latch circuit LT1 latches the output of the fourth OR circuit OR21, and the sixth OR circuit OR31.
Via the first pump starting circuit PD1 to the first pump 5
The start signal is output to 1. Thereby, the first pump 5
1 starts operation.

The pump control circuit in the claims is the circuit OR13-LT3-PD3, OR12-OR2.
2-LT2-PD2, and OR11-OR21-LT1
-OR31-PD1 and the pump sequential control circuit includes circuits OR22-LT2-PD2 and OR21-.
The pump drive monitoring circuit is composed of LT1-OR31-PD1, and the pump drive monitoring circuit includes circuits TM3-AND2 and TM2-AN.
The other pump sequential control circuit constituted by D1 is the circuit AND2-OR22-LT2-PD2 and A.
It is constituted by ND1-OR21-LT1-OR31-PD1.

Furthermore, the capacities of the water tanks after the second water tank 22 may be determined according to the sprinkler head to be used and the size of the corresponding block. For example, when using a normal amount of sprinkler head,
The capacity may be, for example, 1.2 times that of the case of high sensitivity and a small amount of water, and the capacity of, for example, 1.5 times may be used when a normal sensitivity and a small amount of water is used. When the NS head is used as in this embodiment, the pump for each block can supply pressurized water for extinguishing water immediately in response to the operation of the head, which is particularly useful.

[0024]

According to the first aspect of the present invention, a water tank is provided in each of a plurality of blocks in which a building is divided into a plurality of floors, and a plurality of sprinkler heads are provided in each of the plurality of floors and are connected to each other. And a pump that is provided in each of the blocks and that supplies the fire extinguishing water stored in the water tank of the block to the branch pipe of the block through the main water supply pipe, and the pump that is provided in each of the branch pipes. A district valve device that detects running water of the branch pipe and outputs a running water signal, and a pump control circuit that starts a pump of a block to which the district valve device belongs based on the running water signal output from the district valve device. Since it has a built-in fire extinguisher, independent fire extinguishing can be performed in block units, stable water discharge can be performed simultaneously with opening of the sprinkler head, and initial fire extinguishing Unlikely to.

The invention according to claim 2 is provided in each of the water tanks of the blocks excluding at least the lowermost block among the plurality of blocks, and the water level is detected by detecting that the stored water amount of the water tank has dropped to a predetermined water level. A water level gauge that outputs a drop signal, and a pump sequential control circuit that starts a pump of a block below the block in which the water level gauge is provided, based on the water level drop signal output from the water level gauge,
The invention according to claim 3 is based on a pump drive monitoring circuit that determines that the pump has been continuously driven for a predetermined time and outputs a water level lowering signal, and based on the water level lowering signal output from the pump drive monitoring circuit. , Equipped with another pump sequential control circuit that activates the pump of the block immediately below the block, and when the amount of water for extinguishing water in the aquarium decreases to some extent due to water discharge, the pump of the block immediately below that aquarium is driven at that point. , The fire water was fed in sequence from the lower water tank to the pump of the block where the fire broke through the main water pipe that penetrated through the building, so the problem of lack of fire water was solved. The effect of smoothly switching the water supply source and providing stable water discharge for a long time is achieved.

The invention according to claim 4 is connected to a water pipe provided in each water tank and arranged in a building, and extinguishes the water from the water pipe to the water tank when the water level of the water tank naturally drops. Since the automatic water injection device for injecting the water is provided, when the water for extinguishing the fire in the water tank becomes small, the water can be replenished from the water pipe, so that the water for extinguishing the fire does not run short.

[Brief description of drawings]

FIG. 1 is a system diagram showing an embodiment of a sprinkler fire extinguishing facility according to the present invention.

FIG. 2 is a circuit diagram showing an example of a control circuit provided on a control panel in FIG.

[Explanation of symbols]

 10 High-rise building 11-13 Block 21-23 Water tank 24,25 Water level gauge 31 Main water supply pipe 41-46 Branch pipe 51-53 Pump 70 Sprinkler head 81-86 District valve device 81a-86a Flow water detection device 91 Control panel 92 Control circuit 100 water pipe 101-103 float valve

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Akihide Sodeoka 4-7-13 Kudanmin, Chiyoda-ku, Tokyo Within disaster prevention consultants of a stock company (72) Toshio Kan Kan 4-7-3 Dannin, Chiyoda-ku, Tokyo Nomi Misaki Disaster Prevention Co., Ltd.

Claims (4)

[Claims] 1. A water tank provided in each of a plurality of blocks that divide a building into units of a plurality of floors, a branch pipe provided in each of the plurality of floors, and a branch pipe to which a large number of sprinkler heads are connected, A pump that is provided in each block and supplies the fire extinguishing water stored in the water tank of the block to the branch pipe of the block via the main water supply pipe, and a pump that is provided in each branch pipe and detects the running water of the branch pipe. Based on the running water signal output from the district valve device that outputs a running water signal by
An initial fire extinguishing system using a booster pump of a sprinkler fire extinguishing system, comprising: a pump control circuit that starts a pump of a block to which the district valve device belongs. 2. The main water supply pipe cascade-connects a water tank provided in a lowermost block and a pump provided in each of the blocks, and at least the lowermost block of the plurality of blocks. The water level gauges installed in each of the water tanks of the blocks except for detecting the stored water volume of the water tanks have decreased to a predetermined water level and outputting a water level decrease signal, and based on the water level decrease signal output from this water level meter. ,
The initial fire extinguishing apparatus by the booster pump of the sprinkler fire extinguishing system according to claim 1, further comprising: a pump sequential control circuit that activates a pump in a block below the block provided with the water level gauge. 3. The main water supply pipe cascade-connects a water tank provided in the lowermost block and a pump provided in each block, and determines that the driving of the pump has continued for a predetermined time. A pump drive monitoring circuit that outputs a water level lowering signal, and another pump sequential control circuit that starts a pump in a block below the block based on the water level lowering signal output from the pump drive monitoring circuit. An initial fire extinguishing device using a booster pump of the sprinkler fire extinguishing equipment according to claim 1, which is provided. 4. An automatic water injection device, which is provided in each of the water tanks and is connected to a water pipe arranged in the building, for injecting water from the water pipe into the water tank when the water level of the water tank drops. An initial fire extinguishing device using a booster pump of the sprinkler fire extinguishing equipment according to any one of claims 1 to 3, which is provided.