JPS6157032B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automatic stop device for an engine-driven pump device for fire extinguishing.

In other words, in a fire extinguishing pump device driven by an engine, a fire detection signal is received, which is operated manually when a fire is discovered by a person, or automatically activated when smoke or heat is detected, or when pumping water is activated. Automatically controls engine startup, operation, and stop, as well as pump self-priming, water discharging, and drainage operations, by receiving control signals depending on the status of the pump depending on the presence or absence of the pump and the load caused by the engine speed. In particular, when the pump is unable to suck or discharge water, the engine can be automatically stopped.
The purpose of the present invention is to ensure safe driving, prevent damage to various parts, and enable suitable implementation.

Next, the embodiment shown in the drawings will be described.

In Fig. 1, EP indicates an engine-driven pump, and this engine-driven pump EP is equipped with an engine E and a water pump P on an underframe A, and the output shaft of the engine E and the input shaft of the pump P are connected to each other. are directly connected to each other so that the power of the engine E is directly transmitted to the water pump P. CB is a control panel with a mechanism to control the operation of the engine-driven pump EP, and FD is a fire signal transmitter, which is an alarm device that can artificially detect a fire and send a signal that a fire has occurred. It consists of a single device or a combination of detectors that detect atmospheric conditions such as smoke and heat and send out a signal indicating the occurrence of a fire. The VB is equipped with a battery Ba as a power supply, and is equipped with a charger etc. to charge the battery Ba if necessary. These include the control panel CB, engine drive pump EP, fire signal transmitter FD, and power supply unit.
VB is connected by a line.

FIG. 2 is a circuit diagram of an engine-driven pump device for fire extinguishing, where B is a command section, C is a terminal section of the engine-driven pump EP, and D is a control system section. It is built into the control panel CB, and the control system section D is protected by a box G and built into the control panel CB.

The box G has a large number of connection terminals 1 to 23,
Further, the control panel CB is provided with a connection terminal 24.

The terminal 24 connects the control panel CB and the power supply VB, and a power supply (for example, There is a power switch SW ₁ that connects the power (DC12V). Furthermore, terminal 1
is an input terminal for supplying power to the system section D, and here there is a fuse F that protects the system section D,
The line is branched and connected to standby light _L1 . And terminal 2 has an alarm buzzer when water cannot be sucked or discharged.
Bz or warning light L ₂ is connected to terminal 5, a sensor (described later) compatible relay Ys, and terminal 23 is connected to a fire signal transmitter compatible relay YF.

The above-mentioned terminal 6 is a reset input terminal, and a reset push button _PB1 for resetting the circuit in the control system section D is connected here.
is an input terminal for an artificial stop signal when the engine-driven pump EP is artificially stopped. Stop push button PB ₂ is connected here, and terminal 8 is connected to
Switch SW ₂ to switch between automatic or manual operation
is connected to the terminal 9, and a starting push button _PB3 for artificially instructing automatic starting is connected to the terminal 9, and a fire confirmation light _L5 is connected to the terminal 10.

Further, terminals 3 and 4 are output terminals to which a running light L ₃ and a stop light L ₄ are individually connected.

The terminal number 21 in the figure is an input terminal for supplying power to the solenoid valves/solenoids S ₁ to S ₆ and the starter ST (these will be described later) in the terminal section C, and is branched within the control system section D. Relays X ₁ -X ₇ are interposed between each one and continue to terminals 11 - 20.
In addition, the terminal 22 is a terminal for receiving a condition signal for operating the Teichler Ti operating solenoid S _4. A thermistor TH is connected to this terminal 22 to detect the engine E body temperature or outside air temperature. The temperature is converted into a signal and the signal is sent to the control system section D.

Then, when the power switch SW ₁ is turned <ON>, the standby light L ₁ lights up and enters the standby state, and when a fire occurrence signal is sent from the fire signal transmitter FD, the confirmation light L ₅ lights up. Then, the operating light _L3 is turned on at the same time as the automatic start of the engine E is started by the above-mentioned signal or a signal of an artificial start command from the push button _PB3 . In addition, with the push button PB ₂ , the engine E will stop with an artificial stop command signal or a stop signal when water cannot be sucked or discharged, and the stop light will be activated.
L ₄ lights up.

Next, explaining the terminal part C, a vacuum pump VP for removing air from the pump P is installed above the water pump P, and the input shaft of the vacuum pump VP is connected via a wrap transmission device Cm with a tension clutch mechanism. Power is transmitted from the output shaft of engine E. That is, the transmission device Cm is equipped with a pulley on the output shaft of the engine E and the input shaft of the vacuum pump VP, and an endless tuning band is wound between the two, and a tension roller is pressed against the tuning band.・This is a device that causes the tension roller to move away from the tension band, and the rotation shaft of solenoid S ₅ is connected to the arm rod of the tension roller, and the return spring biases the roller in the direction away from the tension band.
By energizing solenoid _S5 , the roller is brought into pressure contact with the tuning belt, which drives the vacuum pump VP.

The engine E is equipped with a carburetor Cu, and a nozzle is opened in the ventilate portion of the carburetor Cu, and the nozzle is communicated with the chamber Cn. A reciprocating solenoid _S4 having a takeler Ti and operating the takeler Ti is installed on the chamber Cn. This solenoid
When S ₄ is energized, it moves forward and Teichler Ti acts,
It is designed to move back with a return spring. In addition, the above chamber Cn is connected to the pipe H by
Through the fuel Kotoku Fv, which is composed of solenoid valve S ₁ ,
This solenoid valve _S1 is communicated with the fuel tank J, and has a return spring biasing the fuel tank Fv in the <close> direction, and is configured to <open> when energized.

Further, the carburetor Cu is provided with a choke valve Cv and a throttle valve THv, sandwiching the ventilate part, and these valves Cv and THv are connected to a solenoid S ₂ and a throttle valve THv.
They are designed to be activated in _S3 respectively. The above-mentioned solenoid S ₂ for the throttle valve Cv and solenoid S ₃ for the throttle valve THv have their rotational shafts individually connected to the rotation shafts of the throttle valve Cv and throttle valve THv via coupling rings, and both are connected to the rotation shafts of the throttle valve Cv and throttle valve THv by means of return springs. The valve Cv and throttle valve THv are energized in the <open> direction, and the choke valve Cv and throttle valve THv are operated in the <close> direction by energization.

Moreover, the arm Am is attached to the shaft of the throttle valve THv.
is provided, and this is connected to a governor lever K via a connecting chain Cs, and the lever K is connected to a governor mechanism Gr, and a spring SP is stretched between the governor lever K and the throttle lever M. has been done. Therefore, the opening degree of the throttle valve THv when the throttle valve THv solenoid _S3 is not energized depends on the operating position of the governor lever K, that is, the tension of the spring SP set by the throttle lever M, and the solenoid _S2 . It is determined by the balance between the force of the return spring and the displacement force of the sprayer in the governor mechanism G.
There is no supply of air-fuel mixture commensurate with the load, and the rotational speed is kept constant.

In addition, a drainage pot KO consisting of a solenoid valve S ₆ is attached to the lower part of the pump P, and this solenoid valve S ₆ is attached in the <open> direction of the drainage pot KO by a return spring. It is designed to close when energized.

The solenoid valve S ₁ for the fuel cock Fv is connected to terminal 11, and the solenoid S ₂ for the fuel valve Cv is connected to terminal 1.
2, solenoid S ₃ for throttle valve THv is connected to terminal 13, and solenoid S ₄ for Teichler Ti is connected to terminal 1.
4, Solenoid S ₅ for transmission device Cn is connected to terminal 15
Solenoids S ₆ for drain KO are connected to terminals 16, respectively.

Furthermore, the engine E is equipped with a flywheel magnet MAG for ignition, the primary side of which is connected to a terminal 19 via a noise filter NF.
This noise filter NF removes noise so that the electromotive force of the magneto MAG does not adversely affect the control system section D as a noise signal. Terminal 18 is connected to an engine-driven pump.
A ground wire is connected to the EP aircraft body, so that when engine E is stopped, the electromotive force generated on the primary side of the magneto MAG can be short-circuited. Further, in addition to the ignition flywheel magnet MAG, a detection flywheel magnet MAG for transmitting a generated voltage signal corresponding to the rotational speed of the engine E to the control system section D is provided, and is connected to the terminal 17. Moreover, the engine E has a starter ST for starting, and a terminal 20
It is connected to the.

In the figure, the symbols F ₁ to _{F 7} are fuses interposed between the respective terminals 11 to 17 and the solenoids/electromagnetic valves S ₁ to _{S 6} /magnet MAG.

A sensor Sn that detects the pumping pressure of the pump P or the presence or absence of water in the water source (for example, the water storage tank W) is connected to the sensor-compatible relay Ys. (The pumping pressure also disappears), and a signal for automatically stopping the engine E is sent to the control system section D in a separate system from the generated voltage signal of the above-mentioned detection flywheel magneto mag. A specific example of the sensor Sn is the second one.
As shown in the figure and Fig. 3, a two-contact transfer type pressure switch SWP is attached to the discharge port of the pump P where pumping pressure is applied, and its line is connected to the output terminal 3 to which the operating light L ₃ is connected. , one line is provided with _a ring line Rs of _the sensor relay
It is connected to the ring wire of Ys.

However, first of all, the pump P is not rotating,
When no pumping pressure is built up in the pressure switch SWP, the line is connected to the other line, but
Since switch element _rs2 of relay (the operating light _L3 will turn on) is possible. Then, when pumping pressure is applied to pressure switch SWp, the line is connected to one line, and the ring line of relay
When Rs is applied, switch elements rs ₁ and rs ₂ are turned on.
However, the output from terminal 3 flows through switch element _rs1 , and relay Xs forms a self-holding relay circuit, but no current flows in the other line, so relay Ys also does not operate, and engine E can be operated continuously. In the above condition, the pressure switch SWp
When no pumping pressure is applied to the water tank W (for example, when there is no water in the water tank W), the line is connected to the other line again, and the output from terminal 3 passes through switch element rs ₂ to relay Ys. is applied, thus providing a signal to terminal 5, engine E is stopped and the output from terminal 3 is also removed, and the operating light is turned on.
L ₃ disappears and the self-holding of relay Xs is released.

Furthermore, Fig. 4 shows another embodiment of the sensor Sn, in which a pressure switch SWp is attached to the discharge port where the pumping pressure of the pump P is applied, and it is connected in series to the switch element of the sensor compatible relay Ys, and the operating light is A timer T and the loop wire of the corresponding relay Ys are connected in series to the terminal 3 to which _L3 is connected. The pressure switch SWp is a switch that turns OFF when pumping pressure is applied, and the timer T is a switch that turns OFF when the pump pressure is applied, and the timer T turns off the vacuum pump Vp for a certain arbitrary period of time from that point on when an output is output from terminal 3, that is, after starting the engine E. The system operates, completes self-priming, generates pumping pressure, and transmits the output to the corresponding relay Ys after a period of time (adjustable) until water can be sucked and discharged. However, in a state where pumping pressure is not built up in the pressure switch SWp, the switch SWp is set to <ON>, but there is no output from terminal 3, so the corresponding relay Ys does not operate, and therefore the terminal 5
In short, engine E can be started because no signal is provided to engine E. Furthermore, when starting up, terminal 3
Even if there is an output and the operating light _L3 lights up, the timer T will not activate the temporary relay Ys, and the pressure switch will not operate until the relay Ys is activated.
When pumping pressure is applied to SWp, switch SWp is turned OFF.
>, so engine E continues to operate.
In this state, if pumping pressure is not applied to the pressure switch SWp, the switch SWp turns <ON>.
An automatic stop signal is provided to terminal 5, engine E is stopped, and the output from terminal 3 disappears, driving light _L3 goes out and relay Ys is deactivated. In addition, a pressure switch is attached to sensor Sn.
Although SWp is used, a float switch may also be used to detect the presence or absence of water in the water tank W.

Furthermore, Fig. 5 is a logic sequence diagram of control system part D, where GT is a gate, IN is an inverter, CN is a comparator, FF is a flip-flop, CO is a counter, LL is a power regulator,
X ₁ to X ₇ and Y ₁ to _{Y 6} indicate relays. FIG. 6 is a block diagram of the control system section D, and FIG. 7 is a flowchart showing the operating sequence.

Here, the operation of the engine-driven pump EP will be explained. First, there is a fire signal transmitter FD, such as a fire detector that automatically detects atmospheric conditions such as fire smoke and heat, or an alarm that artificially detects and notifies a fire.
The signal 200 from is the fire signal compatible relay YF
When the current is replaced by the battery Ba current of the power supply unit VB and input from the terminal 23 to the command side replacement circuit 100 of the control system section D, relay Y ₆ is activated and the battery Ba current is received and the fire confirmation light L ₅ is activated. lights up.

The command side replacement circuit 100 described above has terminals 5 to 9,
High potential (e.g. DC12V) input from 23
In order to make the battery Ba current correspond to the low potential (for example, 5V) supplied from the power supply circuit 115 to each circuit 101 to 114 (described later), relays Y ₁ to
The signal has been replaced at Y ₆ . (Terminals 5 to 9, 2
The signal received from 3 is sent to the command side replacement circuit 100.
The explanation will be omitted hereafter. ) When a fire occurrence signal 200 or a start signal 201 from the start push button PB ₃ that artificially commands automatic start is input to the starting circuit 101, a fuel stop drive circuit 102 receives a fuel stop <open> signal. 203 is transmitted, thereby operating the relay X ₂ of the terminal side replacement circuit 116, and the battery Ba current is applied to the solenoid valve S ₁ from the terminal 21 through the terminal 11, and the fuel tank Fv is opened.

The terminal side replacement circuit 116 includes each circuit 102 to
Relays X ₁ to X ₇ corresponding to low potential signals provided from terminals 104 and 106 to 109 cause high voltage to be energized from terminal 21 to solenoid electromagnetic valves S ₁ to S ₆ via terminals 3, 4, 11 to 16, and 20. potential battery
There is a circuit that intermittents Ba current. (The explanation of the terminal side replacement circuit 116 will be omitted hereafter.) When the fuel tank Fv is opened, the fuel in the tank J is sent to the chamber Cn of the carburetor Cu via the pipe H. At the same time, a drain valve <close> signal 204 is transmitted from the starting circuit 101 to the drain valve drive circuit 106, and the solenoid valve _S6 is energized to close the drain valve KO, and the drain valve <close> is transmitted to the drain valve drive circuit 107. >Signal 215 is transmitted, solenoid S ₂ is energized, and choke valve Cv is closed.

The Teichler activation circuit 103 receives Teichler <activation> signals 206, 212, 213 from the circuits 102, 106, 107, and thermistor signals 206, 212, 213.
Takeler <operation> below a certain temperature from TH
In response to the signal 208, the solenoid _S4 is energized and Teichler Ti is activated to facilitate starting of the engine E in cold regions and cold weather. Also, the starter operating circuit 104 is connected from the circuit 103.
A starter <operation> signal 207 is transmitted to the starter ST, and the starter ST is activated.

This starter ST repeats ON and OFF at regular intervals until the engine E starts.
4 to the counter circuit 105, the number signal 20
9 is transmitted and is repeated an arbitrary number of times, if it does not start, the counter circuit 105 sends the signal to the circuit 10.
2, 107, the signal 205 for the fuel tank <close> and the signal 218 for the valve <open> are transmitted to the tank 2,107.
Close Fv, open the check valve Cv to prevent excessive consumption of fuel, and turn the starter ST ON/OFF again.
Repeat. If it still does not start, a stop signal 210 is sent from the counter circuit 105 to the stop circuit 113.
is emitted.

Next, when the engine E is started, the generated voltage signal 220 of the detection flywheel magnet mag is input to the low speed detection circuit 112 via the terminal 17, and the starter <STOP> signal 222 is transmitted from this circuit 112 to the starter operation circuit 104. The starter ST stops operating. At the same time, a throttle valve <close> signal 221 is transmitted from the circuit 112 to the throttle valve drive circuit 108, and the solenoid _S3 is energized to close the throttle valve THv, preventing the engine E from running at high speed without load, and idling. Driving is done.

It goes without saying that it has the function (signal) to open the engine valve Cv when the engine E is started and operated once, and to open the fuel valve Fv when the engine is restarted. .

Then, after the throttle valve THv closes and the choke valve Cv opens and the engine E enters the idling state, the vacuum pump <operation> is transferred from the throttle valve drive circuit 108 to the vacuum pump operation circuit 109.
Signal 211 is provided, solenoid S ₅ is energized and the wrapper transmission with tension clutch mechanism Cm
to transmit the power of engine E to vacuum pump Vp. The operating time of this vacuum pump Vp is circuit 10.
9, the vacuum pump Vp can be adjusted in advance according to the environment, and when that time has elapsed, the operation of the vacuum pump Vp is stopped.

Thereafter, a throttle valve <open> signal 217 is transmitted from the circuit 109 to the throttle valve drive circuit 108, the solenoid _S3 is de-energized, the throttle valve THv opens with the aforementioned opening degree, and as a result, the engine E After receiving a mixture suitable for the load, the pump P is driven at the rated rotation speed to perform pumping operations for sucking and discharging water.

In this state, if the water storage tank W runs out of water, if a float switch is used as the sensor Sn, it will detect the lack of water storage and also turn on the pressure switch.
When using SWp, it detects situations where pumping is impossible (including no water fall, etc.) and no pumping pressure is produced.
These sensor detection signals 229 are provided to the no-pumping circuit 114 , which in turn conveys a stop signal 228 to the stop circuit 113 .

Furthermore, the rotation of the engine E is detected by a detection flywheel magneto mag, and the generated voltage signal 21 is detected.
9 is provided to the high speed detection circuit 111, and when the high speed rotation or voltage exceeds a certain level, a stop signal 230 is transmitted from the circuit 111 to the stop circuit 113.
The transmission timing of this signal 230 is determined by the circuit 11
Adjustments can be made within 1.

The aforementioned counter circuit 105 to the stop circuit 113.
When one of the stop signals 210, 228, 230 from the high-speed detection circuit 111 and the water pumping failure circuit 114 and the signal 227 from the stop push button PB ₂ which commands an artificial automatic stop is provided, the circuit 113 A throttle valve <close> signal 224 is transmitted from the throttle valve drive circuit 108 to the throttle valve drive circuit 108, and the solenoid _S3 is energized to close the throttle valve THv and reduce the rotation of the engine E. At the same time, a fuel pot <close> signal 226 is transmitted to the fuel pot drive circuit 102, the energization of the solenoid valve _S1 is stopped, and the fuel pot Fv is closed. After that, the drain pot <open> signal 225 is transmitted to the drain pot drive circuit 106, the energization of the solenoid valve S ₆ is stopped, and the drain pot is turned off.
KO opens and drains the remaining water in the water pump P, and relay X ₁ of the terminal side replacement circuit 116, which is activated by the drain pump <open> signal 225, turns <OFF>.
The normally closed switch element then contacts. As a result, the primary side of the ignition flywheel magneto MAG is short-circuited, engine E stops, and the stop light L ₄
lights up.

Reference numeral 110 is a reset circuit which receives reset command signals 214 and 223 from the reset push button _PB3 or the stop circuit 113 and transmits a reset signal 216 to the counter circuit 105. or,
A signal 202 is an automatic operation signal from the manual/automatic changeover switch SW ₂ , and is input to the starting circuit 101.

Further, the signal 230 from the high speed detection circuit 111
To adjust the transmission timing, use the throttle lever M.
The governor mechanism Gr keeps the rotation constant at the rated rotation set in , but due to the nature of the governor mechanism Gr during no-load operation, it maintains a rotation slightly higher than the rated rotation, so it is adjusted to this high speed rotation. .

As mentioned above, water does not come up to the pump P, that is, pumping water from a water source such as the water tank W, clogging of the strainer or wisteria basket, lack of self-priming, water falling, etc. A sensor Sn that detects that water does not come up into the pump P after the water pump P has completed priming when the water suction/discharge) is disabled;
This system has a two-system detection function for detecting the inability of water suction and water discharge, including a flywheel magneto mag for detection, which detects when the water pump P stops suctioning and discharging water after the rated rotation is set, and the engine E rotates at high speed due to no load. The engine E is automatically stopped by one of the signals from the engine. This is for example a vacuum pump
If the operation of the vacuum pump VP is cut off before self-priming (breathing) is completed due to an error in setting the operation time of Vp, the sensor Sn shown in Fig. 3 will be unable to operate the pressure switch SWp once the water has risen. Not working, also the 4th
For sensor Sn in the figure, timer T is connected to the vacuum pump.
Adjustments are made so that the energization delay is longer than the operating time of Vp, so that water pump P self-primes (breaths water).
As a result, the rotation of the engine E, that is, the pump P, suddenly exceeds the rated rotation and reaches a high speed without any load. It is a flywheel magneto mag for detection.
, the engine E is automatically stopped to prevent the pump P from running without water, and the mechanical seal of the pump P is prevented from seizing. At the same time, the engine-driven pump EP for fire extinguishing cools the engine E with some of the water pumped by the water pump P, but prevents engine E from operating without cooling water due to the lack of cooling water from the water pump P. This prevents engine E from seizing.

Conversely, if the strainer or rattan cage attached to the tip of the water suction pipe becomes clogged while the engine-driven pump EP is operating, the pump P will no longer absorb water, and therefore the pumping pressure will be lost, and at the same time the cooling water to the engine E will be removed. supply will also be cut off. However, the engine E continues to rotate in a state where the engine E does not reach the light load high speed rotation region due to the residual water in the water pump P. This is detected by sensor Sn, and engine E is stopped.
This also prevents engine E from operating without cooling water and prevents engine E from seizing.

Furthermore, in the event of water leakage or falling water from the water source, the pump P
Since there is no water inside, there is no pumping pressure, and the engine E rotates at high speed with no load, so any signal from the sensor Sn or the detection flywheel magneto MAG automatically stops the engine E, and the pump P pumps water. This prevents the engine E from operating without cooling water and prevents the mechanical seal from seizing the engine E.

In short, the present invention provides a sensor that detects that water does not come up into the pump after priming of the water pump is completed, and a sensor that detects that water does not come up into the pump after priming is completed, and
We have a two-system detection function for water suction/discharge, including a detection flywheel magneto that detects when water suction/discharge is no longer occurring and the engine is running at high speed with no load. It is possible to reliably automatically stop the engine, that is, the engine-driven pump when water cannot be discharged, thereby preventing operation of the water pump without water or engine cooling water, and preventing seizure of the mechanical seal of the water pump and the engine. This effect is achieved.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a schematic overall view of the device, FIG. 2 is a circuit diagram, FIG. 3 is an explanatory diagram of the sensor, and FIG. 4 is a diagram of another embodiment of the sensor.
Fig. 5 is a logic sequence diagram of the control system section, Fig. 6 is a block diagram of the control system section, and Fig. 7 is a logic sequence diagram of the control system section.
The figure is a flow chart explaining the operating sequence. A...Underframe, Am...Arm, B...Command section,
Ba...Battery, Bz...Alarm buzzer, C...
Terminal section, CB...Control panel, Cm...Wrap transmission with tension clutch mechanism, CN...Comparator, Cn...Chamber, CO...Counter, Cs...
Connecting chain, Cu... vaporizer, Cv... chiok valve, D
...Control system department, E...Engine, EP...
Engine-driven pump, F, F ₁ to F ₇ ... fuse, FD ... fire signal transmitter, FF ... flip-flop, Fv ... fuel tank, G ... box, Gr ...
...Governor mechanism, GT...gate, H...pipe,
IN...Inverter, J...Fuel tank, K...
Governor lever, KO... Drainage control, L ₁ ... Standby light, L ₂ ... Warning light, L ₃ ... Operating light, L ₄ ... Stop light, L ₅ ... Fire confirmation light, LL... Power regulator, M...Throttle lever, MAG...Flywheel magnet for ignition, mag...Flywheel magnet for detection, NF...Noise filter, P...Pump, PB ₁ ...Push button for reset, PB ₂ ...Stop Push button for use, PB ₃ ... Push button for starting, Rs... Ring wire, rs ₁ , rs ₂ ... Switch element, S ₁ to _{S 6} ... Solenoid/electromagnetic valve, Sn...
Sensor, Sp... Spring, ST... Starter, SW ₁ ... Power switch, SW ₂ ... Changeover switch, SWp... Pressure switch, T... Timer,
TH...Thermistor, THv...Throttle valve, Ti
...Taichler, VB...Power supply, VP...Vacuum pump, W...Water tank, _X1 to _X7 , _Y1 to _Y6 ...Relay, Ys...Sensor compatible relay, YF...Fire signal transmitter Compatible relays, 1 to 24...Connection terminals, 1
00-116...Circuit, 200-230...Circuit.

Claims (1)

[Claims] 1 After the pump P is primed, the engine-driven pump EP drives the pump P with the engine E, the fire signal transmitter FD sends out a detection signal by detecting a fire or smoke, etc.
Two systems for detecting the inability to suck and discharge water: a sensor Sn that detects that water does not come up during pump P, and a flywheel magneto mag that detects high-speed rotation due to no load of engine E after setting the rated rotation. and a control system section D that automatically controls the startup, operation, and stop of the engine E and the self-priming, pumping, and drainage operations of the water pump P, and the control system section D is connected to the fire signal transmitter FD. When the signal is received, the engine E is started and the control system section D receives the suction from the sensor Sn or the detection flywheel magnet mag.
An automatic stop of an engine-driven pump device for fire extinguishing, characterized in that when receiving at least one of water discharge impossible signals, the primary side of the ignition flywheel magnet MAG of the engine E is short-circuited to automatically stop the engine E. Device.