JPS58218972A - Apparatus for detecting long time operation of fire fighting pump - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] The present invention relates to a fire pump device.

Fire extinguishing equipment, which is generally used for pills and the like, is used for initial extinguishing in the event of a fire, and is not a device that operates for a long time. In addition, since the fire pump system is always in a stopped state, the pump is periodically started manually or by an automatic inspection device to check its performance, but the operation time at that time does not extend to a long time.

Conventionally, in this type of equipment, if the pump does not stop due to a problem with the automatic inspection device or someone forgets to stop the pump, the pump continues to run for a long time, and if you do not pay attention to it, it goes against energy conservation. It wasn't stupid, and there was a risk of an unexpected accident.

The present invention was made to eliminate this drawback, and measures the operating time of the pump at the same time as the pump starts, and issues an alarm if the pump continues to operate after a preset predetermined time. It is an object of the present invention to solve the above-mentioned problems by providing a control circuit that does this.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 7 is a block diagram of an embodiment of the present invention.

A motor 3 for driving a bon f- and a pump saw is installed on the machine l, and the pump pump pumps up water from the water tank through a suction pipe J, and discharges the water under increased pressure to a discharge pipe 6. A piping 9 is connected from 6 to the roof of the building, for example, via a check valve 7 and a gate valve. There is a pressure switch i on the bong 76-.
o was asked to check the predetermined discharge pressure of the pump saw. When the gate valve is closed and the automatic inspection device // is operated, the automatic inspection device // sends a start command signal for the motor 3 to the control panel saw, the control panel saw starts the motor 3, the ponsaw is operated, and the bonnet is turned on. 7" is operated in a closed state, and the discharge pressure increases. The signal activated by the pressure switch 10 when the bon 76 is in a closed state is sent to the bon saw and the automatic inspection device/l, and the automatic inspection device l/ The control panel/J determines that the poncho is normal based on the signal that the motor 3 has started and is in steady operation, and the motor 3 from the control panel/J is activated.
A signal indicating that the pressure switch 10 is in steady operation is sent to the automatic inspection device //, and if there is no signal from the pressure switch 10, it is notified that the pressure of the pump saw has not increased to a predetermined pressure. When the control panel saw is given the fire signal FS, it automatically starts the motor J and operates the bomb f2.

In the present invention, the control panel saw is equipped with a timer IS (disposed inside the control panel saw, although the illustration shows it outside the control panel saw) which operates in response to a signal from which the control panel saw starts the motor J.

The timer 13 is a long time setting timer, for example, an 8 hour timer. When the timer 13 times up, the alarm generator/II is operated depending on the conditions, and the motor 3 is cut off to stop the bomb fa. Alarm generator/4
1 is activated when the motor 3 is operated continuously due to failure of the control panel saw when there is no fire, and when the automatic inspection device /'/ is operated manually and forgets to return.

Fig. 1 is a daily diagram showing the operation of the present invention.The timer 13 operates in accordance with the activation signal of the pon 7=-, that is, the activation signal of the motor 3, and the stop signal of the pon saw.
That is, the motor 3 stops its operation in response to a signal indicating that the motor 3 is de-energized.

Therefore, when the pump 2 is running at the end of the time set by the timer 13, the timer 13 sends a time-up signal A to the alarm generator/da, indicating that the pump 76 has been running for an abnormally long time, for example, 3 hours. The alarm generator/4' issues an alarm. The time-up signal A of timer/3 is simultaneously sent to the pump stop judgment circuit IA. Then, the fire signal FS is issued, and the fire signal holder/! Fire signal F
S is held and signal B is output, but when signal B is sent to pump stop judgment circuit/6, pump stop judgment circuit/6 does not output. Pump stop judgment circuit 16 for signal B
When the time-up signal A is not received, a stop signal C for the ponsaw is sent to the control panel 12, the power to the mower 13 is cut off, and the ponsaw stops. When neither signals A nor B are input to the pump stop judgment circuit/A, no output is made.

The truth table for pump stop judgment circuit lB is as shown in the following table.

Input Output This is realized by a melon circuit having an H active input terminal for signal A, an L active input terminal for signal B, and an H active output terminal for signal C.

As described above, the present invention is equipped with a timer that operates simultaneously with the activation of the bonnet of the fire pump device and is set for an abnormally long period of operation, and the timer is set to open when the pump is in operation. Since an alarm signal is generated while the pump is running at the time of time-up, it is possible to know if the pump is running indefinitely due to an abnormality in the control device or other human causes. Further, in the above case, if a signal based on a fire signal is not received, the pump can be automatically stopped to prevent the pump from running indefinitely.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an embodiment of the apparatus of the present invention, and FIG. 2 is a block diagram showing the operation of FIG. 1. /・φ Machine base, Co.. Pump, 3.. Motor, Da1”
Water tank, 5... Suction pipe, 6... Discharge pipe, 7... Check valve, Gate valve, Ri... Piping, /θ... Pressure switch, l/... Automatic inspection device, / Co.・Control panel, 13..Timer, /da..Alarm generator, /3..Fire signal holder, /A..Pump stop judgment circuit, FS..Fire signal, A
...Time-up signal, B...signal. Patent applicant: Ebara Corporation Agent: Arai Figure 1

Claims (1)

[Claims] 4. A fire pump device, a timer that operates simultaneously with the start of the pump, and a control circuit that generates an alarm signal when the pump is operating even though the timer has timed up. A long-time operation detection device for a fire pump, characterized by comprising: λ The control circuit determines whether or not a start signal due to a fire has been received before the alarm signal is generated when the pump is started, and if the start signal due to a fire has not been received, the control circuit has the ability to stop the pump. A long-time operation detection device for a fire pump as claimed in claim 1.