JPH10201872A - Fire extinguishing facility and driving method for the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve reliability, surely drive a facility and reduce a starting current and the size of an emergency power source by using the specified number of pumps as motive force sources and connecting them through a time difference starting means to the emergency power source. SOLUTION: One end of the water piping for fire extinguishment is made to communicate through two pumps P1 and P2 with a water tank. The pumps P1 and P2 having the same capacity such as about 3.7KW and about 150L/min are used. Besides, both the pumps P1 and P2 are mutually separated so as not to be simultaneously broken down in the case of fire. Motors M1 and M2 of respective pumps P1 and P2 are connected through switches SW1 , SW2 and SW3 to an ordinary power source such as an AC power source AC, for example, and connected through the automatic changeover switch SW3 to the emergency power source such as a private power generator SE, for example. Besides, the pumps P1 and P2 perform time different activation under the control of the control panel, namely, the pump P1 is first activated and after the activation is completed, the pump P2 is activated. Thus, the starting current is reduced and reliability is improved because of distributed arrangement.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to fire extinguishing equipment such as water spray fire extinguishing equipment, foam fire extinguishing equipment, and sprinkler fire extinguishing equipment, and more particularly to fire extinguishing equipment and a driving method thereof.

[0002]

2. Description of the Related Art In a sprinkler fire extinguishing system, a pump is used to pump fire extinguishing water in a water storage tank to a sprinkler head. However, if the capacity of the pump is small, a required amount of fire extinguishing water can be supplied to the sprinkler head. Can not.

Accordingly, the following capacity is required as a power source for fire extinguishing equipment under the law. 1) For indoor fire hydrants, two indoor fire hydrants of the same standard can be used at the same time. 2) In the case of outdoor fire hydrants, two outdoor fire hydrants of the same standard can be used at the same time. Generally, a fire hydrant is used by pushing a push button in a fire hydrant box, turning a pump motor, extending a hose of the fire hydrant and opening a valve.

This requirement is to enable simultaneous extinguishing of the two largest fire extinguishing compartments.
Incidentally, the fire extinguishing compartment, for example, is formed on the 50 m ² 200 m ^2.

In order to satisfy this demand, a conventional large-capacity fire hydrant is provided with one large-capacity pump, for example, a rated power of 7.5 kW and a capacity of 300 L / min, and this one pump covers two hydrants. .

[0006]

The prior art has the following problems. (1) The fire extinguishing system is provided with an emergency power source for driving the pump in the event of a power outage, for example, a private generator. However, when the pump is started, a larger current is required than during operation. As for the current at the time of starting, the ratio of the starting current to the rated current increases as the capacity of the pump increases. For example, a 7.5 kW motor requires a starting current of about 20 to 40 kW. For this reason, in the conventional example, the capacity of the private generator becomes large, and the economic investment becomes large.

(2) In the case of operating with only one pump, if a trouble such as a failure or burning due to a fire occurs, the fire extinguishing equipment cannot be driven. (3) Since the fire water for two fire hydrants is always lifted,
If only one hydrant is used, power is wasted.

[0008] In view of the above circumstances, the present invention increases reliability by dispersing the power source pump of a fire extinguishing system into two units,
It is an object of the present invention to be able to drive reliably. Another object is to reduce the emergency current by reducing the starting current.

[0009]

The present invention comprises a power source capable of using two fire hydrants at the same time; a regular power source for driving the power source; and an emergency power source for driving the power source in the event of a power failure. A fire extinguishing system, wherein the power source is constituted by two pumps; and the pump is connected to an emergency power source via a time lag starting means.

The present invention relates to a method for driving a fire extinguishing system, comprising: a power source capable of driving two fire hydrants at the same time; a regular power source for driving the power sources; and an emergency power source for driving the power source in the event of a power failure. The power source is constituted by two pumps; and the two pumps are activated at staggered times.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Two pumps are used as a power source capable of driving two fire hydrants at the same time. Although the two pumps have the same standard, they need not always be the same.

The motors of the two pumps are connected to a common power supply via switches. Although an AC power supply is used as this power supply, a DC power supply may be used. Further, each of the motors is connected to an emergency power source via delay operation means. As the emergency power source, for example, a private power generator is used.

In the case of a normal power supply. When one of the two hydrants is used with a normal power supply, only the motor of the first pump is driven by a start signal such as a start push button,
drive. When fire extinguishing water is discharged from the head of another adjacent fire extinguishing section while operating one fire hydrant, the water pressure becomes insufficient and the water pressure drops. When this drop in water pressure is detected, the second pump automatically starts up and starts operation.

In case of emergency power supply. If the first pump is operated with the regular power supply and one hydrant is operated and a power failure occurs, the emergency power supply is automatically switched to. While driving one hydrant,
When the extinguishing agent is released from the head of another adjacent fire extinguishing section, the water pressure becomes insufficient and the water pressure drops. When this drop in water pressure is detected, the second pump automatically starts up and starts operation. If a power outage occurs while two hydrants are running, the system automatically switches to emergency power. In this case, a time difference is activated using a timer or the like. That is, first, after starting the first pump and entering a complete operation state, the second pump is started. In this way, the two pumps are electrically activated, so that the two pumps are not simultaneously activated.

[0015]

Embodiment 1 A first embodiment of the present invention will be described with reference to FIGS. One end of the fire extinguishing water pipe 1 communicates with the water storage tank 2 via pumps P ₁ and P ₂ . The two pumps P ₁ and P ₂ have the same capacity, for example, 3.7 KW and 150 L / min.
The pumps P ₁ and P ₂ are provided apart from each other to prevent simultaneous failure due to fire or the like.

The motors M ₁ and M ₂ of the pumps P ₁ and P ₂ are connected to a normal power supply, for example, an AC power supply AC via switches SW ₁ , SW ₂ and SW ₃ . Further, the motors M ₁ and M ₂
Emergency power, for example, are connected to the private power generator (SE) via the automatic changeover switch SW ₃ is. The fire extinguishing water pipe 1 is provided with fire hydrants 3a, 3a ₁ , 3a ₂ and 3b. For example, the fire hydrants 3a, 3a ₁ and 3a ₂ are arranged on the second floor, and the fire hydrant 3b is arranged on the first floor. Has been established.

Next, the operation of this embodiment will be described, but mainly the activation of the pump. (1) A case where _one pump P1 is driven using a common power supply AC. Issues a start command of the pump P ₁ from a not-shown control panel, the switch SW ₁ is the motor M ₁ turned on is started.
Pump P ₁ when the motor M ₁ is started drives, the fire fighting water in the water storage tank 2 is pumped into hydrant 3a _1, supply water to the fire extinguishing water pipe. When the pump P ₁ falls completely operating conditions, start-up completion signal is sent to the control panel.

(2) A case where two pumps are operated by using a commercial power supply AC. Issues a driving command of the pump P ₁ from a not-shown control panel, the switch SW ₁ activates the motor M ₁ turned on, fire hydrant 3a ₁ since the pump P ₁ is driven to start the operation.
When the pump P ₁ falls completely operating conditions, start-up completion signal is sent to the control panel. After receiving the start completion signal, switch SW ₂
Is turned on, the motor M ₂ is started, since the pump P ₂ is driven, the operation of the fire hydrants 3a ₂ is started. When the pump P ₂ falls completely operating conditions, start-up completion signal is sent to the control panel. As described above, the pumps P ₁ and P ₂ are started at a time interval, that is, started at a time difference. The operation may be performed by an automatic switch operation using a simple timer, a computer, or the like, or a manual switch operation by an operator. . The pump P
During operation hydrants 3a ₁ to activate the _1, starts the pump P ₂ is automatically may extinguishing water from the head of the other adjacent extinguishing compartments was released two pumps are simultaneously operated. That is, the water pressure becomes insufficient during the operation of _one pump P1,
When the water pressure drops, the water pressure detecting means detects a drop in the water pressure. Then, the control panel emits an activation command of the second pump P _2, the switch SW ₂ is activated the motor M ₂ becomes turned on, the operation of the pump P ₂ is started.

(3) A case where one pump is driven by using the private generator SE at the time of a power failure or the like. If the operation is one hydrants 3a ₁ of the first pump P ₁ in a conventional power supply and power failure during operation, the automatic changeover switch SW ₃
Is automatically switched to the private power generator SE and is operated in the same manner as a regular power supply.

(4) A case where two pumps are driven using the private generator SE at the time of a power failure or the like. If a power failure occurs while driving two fire hydrants is an automatic changeover switch SW ₃ switched automatically to private power generator SE, in this case, both pumps P _1, P ₂ activates the time difference. The time difference starting operation is performed by a manual operation or an automatic operation by a timer or the like. That is, first, the switch SW
After entering the fully operating condition to start the first pump P ₁ to ₁ on and activates the second pump P ₂ turns on the switch SW _2. Since the start is performed at such a time difference, a large starting current is not required unlike the case where two pumps are started electrically at the same time.

[0021]

Embodiment 2 A second embodiment of the present invention will be described with reference to FIG. 3. The difference from the first embodiment is as follows. (1) Each of the motors M ₁ and M _{2 of the} pumps P ₁ and P ₂ has a different service power source AC ₁ and AC ₂ , respectively, and the motor M ₁ is connected to the service power source AC ₁ via a switch SW ₄ . motor M ₂ is connected to the commercial power AC ₂ via the switch SW _5.

(2) The emergency power supply SE is a delay circuit, for example,
It is connected to the motor M ₂ via the timer T. The time difference between the pumps P ₁ and P ₂ is automatically started by the timer T.
0 to 60 seconds.

[0023]

According to the present invention, two pumps are used as a power source capable of driving two fire hydrants at the same time, so that the capacity of one pump can be reduced to about half that of the conventional pump. Therefore, the starting current becomes much smaller than in the conventional example, and accordingly, the capacity of the emergency power supply can be made much smaller than in the conventional example, for example, it can be reduced to half or less.

Since there are two pumps, if one pump fails, another pump can be used. Therefore, troubles related to water supply are reduced as compared with the conventional example.

When two pumps are arranged apart from each other,
Even if the pumps are damaged by a fire or the like, the probability that both pumps fail simultaneously is extremely small. Therefore, the safety factor is improved as compared with the conventional example.

[Brief description of the drawings]

FIG. 1 is a flowchart showing a first embodiment of the present invention.

FIG. 2 is a diagram showing a control system of the pump.

FIG. 3 is a view showing a second embodiment of the present invention, and is a view corresponding to FIG. 2;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Fire extinguishing water pipe 3a Fire hydrant 3b Fire hydrant 5a Fire extinguishing compartment 5b Fire extinguishing compartment P ₁ pump P ₂ pump AC AC power supply SE Private generator

Claims (5)

[Claims] 1. A fire extinguishing system comprising: a power source capable of driving two fire hydrants at the same time; a regular power source driving the power source; and an emergency power source driving the power source in the event of a power failure. Fire-extinguishing installation, characterized in that the source is constituted by two pumps; the pumps are connected to the emergency power supply via staggered activation means. 2. The fire extinguishing system according to claim 1, wherein each motor of the two pumps is connected to a separate common power supply. 3. A driving method for a fire extinguishing system comprising: a power source capable of driving two fire hydrants at the same time; a regular power source driving the power source; and an emergency power source driving the power source in the event of a power failure. A method for activating a fire extinguishing system, wherein the power source is constituted by two pumps; and the two pumps are activated at staggered times. 4. The fire extinguishing system according to claim 3, wherein one pump is operated when one hydrant is driven, and two pumps are started with a time difference when driving two hydrants. starting method. 5. The method for starting fire extinguishing equipment according to claim 3, wherein the time lag starting is performed by a timer circuit.