JP2001149495A - Operation mode control device for fire pump - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a mode fixation from occurring at the time of a mode switching in a fire pump having an automatically relayed water-feeding mode. SOLUTION: When a relayed water-feeding, wherein a plurality of fire pumps are serially connected to perform a water-feeding from a water source, is performed, a fire pump having an automatically relayed water-feeding mode which automatically starts the operation when detected a water-feeding from a fire pump on the front stage, is controlled by this operation mode control device. Such an operation mode control device is equipped with operation mode switching keys which switch a plurality of operation modes including the automatically relayed water-feeding mode, and a mode determination delaying means which delays a mode determination by a specified period of time so that an operation mode after the mode switching may not be instantly determined when operation modes are switched by the operation mode switching keys.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fire pump operating mode control device, and more particularly to a fire fighting pump for connecting a plurality of fire fighting pumps in series and performing relay water supply from a water source. The present invention relates to an operation mode control device for a fire-fighting pump having an automatic relay water supply mode that automatically starts operation upon detecting water supply.

[0002]

2. Description of the Related Art Conventionally, when a fire site such as a forest fire is far from a water source, so-called relay water supply is performed in which a plurality of portable fire pumps are connected in series to supply water over a long distance. For example, Japanese Patent Application Laid-Open No. 9-154974 discloses a configuration in which a fire pump (hereinafter abbreviated as a pump) is connected in a plurality of stages to perform relay water supply. There, the pumps in the second and subsequent stages automatically start when they sense the water supply from the previous stage, and perform relay water supply without placing an operator in each stage.

[0003] Japanese Patent Application Laid-Open No. 10-15105 also discloses a pump that detects water supply and performs automatic relay water supply. Here, in consideration of the problem that the installed water pressure sensor malfunctions due to air pressure fluctuation during relay water supply, the water pressure and the air pressure are determined based on the pressure difference between the inlet side and the outlet side of the pump.

In such a pump that performs automatic relay water supply, switching between normal water discharge operation performed by a single pump and relay water supply is performed by a switch operation, and an operator operates the pump body or a remote control device. It is set by appropriately switching the operation mode.

[0005]

However, if the operation mode is switched in such a manner that the mode is immediately switched every time the mode switch is pressed and the mode is fixed, the input water pressure exceeding a predetermined level is detected by the water pressure sensor. In such a case, there is a problem that it may not be possible to switch to the mode after the automatic relay water supply.

That is, in the automatic relay water supply mode, when the input water pressure reaches a certain pressure, the engine is automatically started to start the relay water supply, so that the input water pressure is higher than the starting pressure. Then, at the moment when the mode is changed to the automatic relay water supply during the operation mode switching, the engine is started and the relay water supply is started and fixed, and it is impossible to shift to the subsequent mode. In other words, if other modes cannot be selected without passing through the automatic relay water transmission mode, the automatic relay water transmission mode must be selected even for a moment, and in such a case, the mode after the automatic relay water transmission mode cannot be selected. Problem.

Further, once operating in the relay water supply mode, the mode immediately before the power is turned off is stored even if the power is turned off, and the operation is started from that mode at the next operation.
Therefore, even if the power is turned off in order to stop the relay water supply mode, there is a problem in that the device operates in the relay water supply mode and cannot escape therefrom.

An object of the present invention is to prevent a mode sticking at the time of mode switching in a fire pump having an automatic relay water supply mode.

[0009]

SUMMARY OF THE INVENTION An operation mode control apparatus for a fire pump according to the present invention includes a plurality of fire pumps connected in series to relay water from a water source to supply water from a preceding fire pump. Operation mode control device of a firefighting pump having an automatic relay water supply mode for automatically detecting and starting operation, wherein the operation mode switching means for switching a plurality of operation modes of the fire pump including the automatic relay water supply mode, When the operation mode is switched by the operation mode switching means, a mode determination delay means for delaying the determination of the operation mode after the mode switching for a predetermined time is provided.

According to the present invention, when the operation mode is switched by the mode switching means, the operation mode after the mode switching is not immediately determined. Therefore, even if another mode cannot be selected without passing through the automatic relay water supply mode, it is possible to easily shift to the mode after the automatic relay water supply mode. Therefore, for example, when receiving water from the previous stage pump and the input water pressure exceeds the pump starting water pressure in the automatic relay water supply mode, when trying to select another mode via the automatic relay water supply mode, The mode can be freely selected without being automatically determined as "automatic relay water supply" when passing through the automatic relay water supply mode.

[0011]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is an explanatory diagram showing the overall configuration of a firefighting pump control system to which a firefighting pump using an operation mode control device according to an embodiment of the present invention is applied. FIG. 2 is a diagram showing the configuration of a control system in the system of FIG. FIG.

In the system shown in FIG. 1, a network is constructed by connecting controllers (control devices) 3 (3 a to 3 e) to a fire pump 1 via a twisted pair line (twisted pair line) 2, and the pump 1 is controlled by the controller 3. Is also configured to be remotely controllable. 1 and 2 are examples in which a portable pump is used as the pump 1. The pump 1 includes a water-cooled two-cycle engine and a vacuum pump driven by the two-cycle engine. Then, water is pumped up from the water source 4 through the suction pipe 5 and sent to the fire hose 6 while adjusting the flow rate and the water pressure by the pump 1.

Here, the pump 1 is controlled by a main controller 10 composed of a microcomputer housed in the pump 1. As shown in FIG. 2, the main control unit 10 includes a control circuit 1 having an operation control circuit 11 and a communication control circuit 12.
3 is provided. In this case, the operation control circuit 11 and the communication control circuit 12 each include a CPU (not shown)
An M, a RAM, a timer, an input / output (I / O) unit, an A / D conversion unit, and the like are provided, and control of the engine and the like is performed based on detection data from various sensors.

The operation control circuit 11 includes various actuators such as an engine ignition device 21, a cell starter 22, a throttle drive motor 23, and an engine speed sensor 2.
4. Various sensors such as an engine coolant temperature sensor 25, an engine oil sensor 26, a fuel sensor 27, a water discharge pressure sensor 28, a water discharge flow sensor 29, a water pressure detection sensor 30, and a battery level sensor 31 are connected. The water pressure detection sensor 30 is a sensor that is used exclusively when performing relay water supply, and detects the water supply pressure from the preceding pump and automatically starts the engine, performs throttle control, and stops the engine. belongs to.

The operation control circuit 11 constantly monitors the sensors when the power is turned on. This is because the fire pump is not a device that is always used, so it is difficult to grasp the failure in advance, and if a failure occurs during use, it is necessary to take immediate action. Therefore, the diagnosis process is started at the same time when the power is turned on. When the sensor output value is equal to or more than a certain level or equal to or less than a certain level, it is determined that an error has occurred and the error process is performed. That is, an error is displayed on the operation display panel 18 described later,
By notifying the operator of the occurrence of the error, the occurrence of the error can be immediately confirmed when the power is turned on. At this time, depending on the error state, the engine is stopped to prevent the failure from spreading due to the error, and to actively notify the operator of the error.

Further, the operation control circuit 11 automatically executes the zero setting of the water pressure detection sensor 30. This is because when the water source is higher than the pump position as in the case of rooftop water supply, an error occurs in the sensor detection value due to the atmospheric pressure, and accurate control can be performed by correcting the error. This correction operation is performed by pressing a power key 51 of the operation display panel 18 described later, and the sensor detection values before and after the correction are stored in the RAM in the operation control circuit 11. Therefore, when the power of the pump 1 is turned on, the zero reset of the sensor is automatically executed, and when the power key 51 is pressed at a desired time, the zero reset can be performed at that time.

The main control unit 10 further includes a power supply circuit 14 connected to a battery and supplying power to the control circuit 13;
Operation input circuit 15 receiving instructions from operation display unit 17
And a display output circuit 16 for outputting various current data of the pump 1 to an operation display unit 17 in response to a request from an operator. In this case, the operation display section 17 has a configuration including an operation display panel 18 and a throttle operation key 19, and is arranged on the upper surface of the pump 1.

FIG. 3 is an explanatory diagram showing the configuration of the operation display section 17. On the operation display panel 18 side, various switch keys and a display section are provided. In this case, an operation unit is arranged on the right side of the operation display panel 18 and a display unit is arranged on the left side in consideration of the convenience of an operator who is often right-handed. That is, first, a power key 51, an engine start key 52, and an engine stop / reset key 53 are provided in a lower right portion, and an operation mode switching key (operation mode switching means) 5 is provided in an upper right portion.
4. A display switching key 55 and a set value change key 56 are arranged.

These keys are used to “pick”
Such an operation sound is issued, the operator can clearly recognize that the apparatus has accepted the operation, and the operator is alerted about the switching of the mode and the like. Also,
The engine stop / reset key 53 is continuously operated for t seconds (for example, 3 seconds) in order to prevent the power from being turned ON / OFF due to an accidental erroneous operation due to an unexpected contact or the like.
Unless the key is kept pressed, the power cannot be turned on / off.

A mode display lamp 57 for displaying the current operation mode is arranged on the left side of each key in the upper right part. Each time the operation mode switching key 54 is pressed, the operation mode changes from “manual water discharge” → “automatic water absorption” → “relay water supply (automatic relay water supply)” → “pressure control” → “flow rate control” →
The mode is switched in the order of “manual water discharge”, and in response to this, the mode display lamp 57 is also lit in the corresponding mode part.

In this case, in the operation display section 17 of the present invention, when switching the operation mode, a delay time is set in the operation display section 17 between the mode switching and the mode determination, and the mode switching is performed simultaneously with the mode switching. Is set not to be determined. This is because, as described above, the mode is switched immediately each time the operation mode switching key 54 is pressed, and the mode is settled. If the input water pressure equal to or higher than the predetermined value is detected by the water pressure detection sensor 30, the "relay water supply" This is because there is a possibility that the mode cannot be switched to the subsequent mode.

That is, in addition to the configuration in which the pump 1 supplies water as a single pump as shown in FIGS. 1 and 2, the pump 1 can also perform relay water supply by connecting a plurality of similar pumps in series. One of the modes includes an automatic relay water supply mode in which when the input water pressure reaches a certain pressure, the engine is automatically started to start the relay water supply.

In this case, the pump of each stage is set to the "relay water supply" mode, and when the water pressure detection sensor 30 detects a water pressure equal to or higher than a predetermined value, the start, throttle control and stop of the engine are automatically executed. Then, by multi-stage control of the throttle drive motor 23, the water supply pressure and flow rate are controlled based on the water supply pressure and flow rate from the previous stage, and the water is sent to the next stage.

As described above, in the pump 1, when the "relay water supply" mode is selected, when the input water pressure reaches a certain pressure, the engine is automatically started to start the relay water supply. Therefore, when water is received from the preceding pump and the input water pressure is equal to or higher than the starting pressure, if the operation mode is switched from, for example, “automatic water absorption” to “pressure control”, the operation mode switching key 54 is pressed to switch the mode. The engine is started at the moment of “relay water supply”, the “relay water supply” is started and fixed, and a situation occurs in which it is not possible to shift to “pressure control”.

At this time, once operating in the "relay water supply" mode, as described above, the mode immediately before the power supply is turned off is stored even if the power supply is turned off, and even if the power supply is turned off, the automatic relay water supply mode is exited. Can not.

In addition, even when water is supplied from the rooftop water tank, it may be assumed that the input water pressure is equal to or higher than the starting pressure due to a subsequent situation change despite the above-mentioned zero reset function. And in this case as well,
When switching the operation mode, the relay water supply is started and fixed at the moment when the mode becomes “relay water supply”.

Therefore, in the pump 1, a delay time is provided between the mode switching and the mode determination to prevent the next mode from being immediately determined even when the operation mode switching key 54 is pressed, thereby preventing the mode from sticking. That is, when the operation mode switching key 54 is pressed to shift to the next mode, the mode is not determined for t seconds (for example, 3 seconds), and the mode is determined only after t seconds. At this time, the mode display lamp 57 blinks during the delay time to indicate to the operator that the mode determination standby is in progress. When the mode is determined after elapse of t seconds, the display is turned on, and the operation in the mode starts. As a result, even when the input water pressure equal to or higher than the starting pressure is applied, the mode can be freely selected without causing the operation mode to be stuck.

Note that these controls are executed by the operation control circuit 11 functioning as mode determination delay means.
That is, the operation mode switching key 54 of the operation display panel 18
When the operation mode is switched by pressing, the command is input to the operation control circuit 11 via the operation input circuit 15.
The operation control circuit 11 receiving this signal counts the delay time using a timer each time the operation mode is switched, based on the delay time t stored in the ROM. During this timing, the operation control circuit 11 outputs a signal to the display output circuit 16 to blink the mode display lamp 57. Then, when an operation mode is selected and t seconds elapse after the selection, the operation control circuit 11 determines the operation mode and executes the operation in the operation mode. In addition, the display output circuit 1
In response, a signal indicating that the selected and executed mode display lamp 57 is turned on is output.

At the upper left of the operation display panel 18, a numerical value display section 58 for displaying 7 segments is arranged. Above the numerical value display unit 58, a numerical value attribute display unit 59 showing the attribute of the numerical value shown there is provided.
A unit display section 60 indicating a unit of a numerical value is arranged. Each time the display switching key 55 is pressed, the display mode changes from “engine speed” → “discharge pressure or discharge flow rate set value” → “discharge pressure or discharge flow rate measured value” → “engine cooling water temperature” → “engine rotation speed”. In this order, the numerical attribute display section 59 and the unit display section 60 are lit in this order in accordance with the number.

As described above, in the pump 1, the operator can easily know the engine speed, the engine cooling water temperature, and the discharge flow rate, which could not be known by the operator, by one switching operation of the operator. In addition, the discharge pressure, which has been conventionally read by a pressure gauge, can be confirmed on a digital display without reading the vibrating pointer. Therefore, accurate information on the state of the pump 1 can be obtained over a wider range, and more accurate operation can be performed.

The numerical value display section 58 displays not only numerical data but also various messages as operation information. For example, when the throttle opening is increased by the throttle operation key 19 and the throttle is fully opened and does not increase any more, a message "FULL" is displayed. In addition, a plasma display may be used as the numerical value display unit 58 instead of the 7-segment. In this case, when the engine start key 52 or the engine stop / reset key 53 is pressed, “START”,
A display such as "STOP" is also performed. Further, when the above-mentioned zero reset is performed, “0SET” is displayed,
When this is returned to the initial state, "INIT" (initial
Is displayed.

In addition, when an error is detected by the operation control circuit 11 in the sensor abnormality diagnosis, an error display "Er" is displayed on the numerical value display unit 58 in accordance with the type of the error.
r. 1 "is displayed. FIG. 4 is a table showing an example of the error code. For example, when "Err. 1" is displayed, it indicates that the water discharge pressure sensor 28 has failed. The cancellation of the error display is performed by the engine stop key 53. Further, not only an error display but also an alarm buzzer or the like may be activated at the same time.

At the lower left of the operation display panel 18, an abnormality warning display section 61 is arranged. This abnormal warning display section 6
1 includes a fuel warning lamp 6 which is turned on when the remaining fuel amount falls below a predetermined value.
2. There is provided an engine oil warning lamp 63 which lights up when the engine oil remaining amount becomes lower than a predetermined value, and an engine cooling water temperature warning lamp 64 which lights up when the engine cooling water temperature becomes higher than a predetermined value. In addition, the abnormality warning display section 61 includes a drain cock warning light 65 that lights up when a drain cock for draining fuel is opened during long-term storage or the like, and a pump operation warning light 66 that lights up when the vacuum pump is operating. A battery level warning lamp 67 is provided which lights when the battery level falls below a predetermined position.

A throttle operation key 19 is provided below the operation display panel 18 so that the throttle valve can be opened and closed by operating the key.
In the pump 1, the throttle valve is opened and closed by a throttle drive motor 23 composed of a DC motor, and is controlled by an operation control circuit 11.

Conventionally, some fire pumps use a motor to open and close a throttle valve of an engine. However, the fire pump is limited to ON / OFF control of the motor, and delicate valve opening adjustment is performed. Did not. However,
A delicate throttle adjustment is required to automatically control the discharge pressure and the discharge flow rate, and it is difficult to obtain a constant output due to hunting or the like by simple ON / OFF control. Also, when performing relay water supply, it is necessary to finely adjust the discharge pressure, etc., following the pulsation of water supply from the previous stage,
Fine tracking control cannot be achieved by the ON / OFF control.

Therefore, in the pump 1, the speed of the throttle drive motor 23 is controlled in a plurality of stages to achieve fine adjustment of the degree of opening with good followability. That is, a pulse voltage as shown in FIG. 5 is applied to the throttle drive motor 23, and its ON time / O
Depending on the duty ratio of the FF time, for example, speed control including 16 steps of forward rotation, 8 steps of reverse rotation, and 1 step of stop is performed. FIG. 5 is an explanatory diagram showing an example of a pulse voltage applied to control of the throttle drive motor 23.

In this control, the duty frame F of the pulse voltage (the length of one cycle of the pulse) can be arbitrarily set for each control stage. In FIG. 5, the duty frame F has two forward rotation stages. Is set smaller (F ₁ > F ₂ ). Furthermore, the duty frame F can be set arbitrarily in each control stage, and can be changed, for example, between when the motor is started and after that. In the first forward rotation stage in FIG. 5, the duty frame F at the time of startup is set to be small, and the duty frame F is gradually increased (F ₁ <F ₃ ).

Therefore, in this control, even if all the ON times t of the respective control stages are set to be the same, the duty frame F
, The duty ratio can be arbitrarily changed. Therefore, by setting one is ON time t _x, can be realized stepwise rotation control, phase adjustment can be easily performed.

The duty frame F of each control stage
And the speed may be controlled stepwise by making the length of the ON time t different. That is,
By setting the ON time t of the forward two-stage to be longer than the ON time t of the forward one-stage, it is also possible to make the motor rotation speed of the forward two-stage higher than the forward one-stage. Further, the length of the duty frame F and the length of the ON time t can be set arbitrarily, and a wider range of control can be executed.

As described above, in the pump 1, since the duty frame F can be arbitrarily set for each control stage, the range of the control form is widened, and more delicate control can be realized by a simple setting operation.

In the pump 1, an example is shown in which a DC motor is used as the throttle drive motor 23. However, the type of motor used is not limited to a DC motor. For example, a stepping motor or an AC motor may be used. good.
In this case, pulse control similar to that described above may be performed for a stepping motor, and frequency control may be performed for an AC motor using an inverter.

On the other hand, in the system shown in FIGS. 1 and 2, the pump 1 can be remotely controlled by the controller 3. That is, in the system, as shown in FIGS. 1 and 2, a network is constructed by connecting the twisted pair wires 2 which are less attenuated than the parallel type conductor wires and are less affected by noise, and the pump 1 and a plurality of Distributed communication control is performed with the controller 3 to realize remote control of many pumps 1.

In this system, the controller 3 can be connected and disconnected at any place on the twisted pair line 2.
That is, they can be appropriately arranged like the controllers 3a to 3d in FIG. 1, and can be additionally provided (up to 255). Alternatively, the connector 7 may be provided like the controller 3e, and may be connected as needed.

As shown in FIG. 2, the controller 3
The control unit 70 includes a microcomputer, and includes a control circuit 73, a power supply circuit 74, an operation input circuit 75, and a display output circuit 76, similarly to the main control unit 10 of the pump 1. The control circuit 73 includes an operation control circuit 71 and a communication control circuit 72. The communication control circuit 72 is connected to the twisted pair line 2. The twisted pair line 2 is connected to the communication control circuit 12 of the main control unit 10 of the pump 1, and the controller 3 and the pump 1 exchange signals via the twisted pair line 2.

In this case, the system uses p-CSM
A (p-persistent, Carrier, Sense, Multiple, Access) network system is adopted. Even if the network becomes saturated at a tense site such as a fire, the throughput is kept high and the collision rate is maintained. It is set to suppress pulling.

FIG. 6 is an explanatory diagram showing the structure of a signal in the p-CSMA system. As shown in FIG.
In the SMA system, each transmitted packet is a Beta
Sent following the 1 period and some Beta2 period slots. During the Beta1 and Beta2 periods, it is sufficient for all controllers 3 on the network to detect the start of signaling from other controllers 3 and to suppress their own signaling start in the next Beta2 slot. Has a width. Also, when each controller 3 is ready to transmit a packet, 1 to 1
Generate a random number up to 6. Then, the controller 3 determines which Beta2 during the next packet cycle.
Decide whether to transmit in a slot and avoid signal collisions.

The controller 3 has an operation display section 77 similar to that shown in FIG. 3, in which an operation display panel 18 and a throttle operation key 19 are arranged. The operation display unit 77 includes an operation input circuit 75 and a display output circuit 76.
Is connected to the control circuit 73 via the. When a key on the operation display panel 18 or the throttle operation key 19 is operated, a control signal is output from the communication control circuit 72 to the pump 1 via the twisted pair line 2 based on a command from the operation control circuit 71. That is, for example, when the engine start key 52 is operated by the controller 3a, the operation signal is transmitted to “the communication control circuit 72 → the twisted pair line 2 → the communication control circuit 12”, and the cell starter 22 is instructed by the operation control circuit 11. Is driven to start the engine of the pump 1.

On the other hand, the pump 1 sends various data such as the engine speed and the water discharge pressure to the twisted pair line 2. Then, the operation control circuit 71 of each controller 3
Acquires the data via the communication control circuit 72, and displays the data on the operation display panel 18 according to the selection of the operator. For example, when the display switching key 55 is operated to select the “engine speed” display, the operation control circuit 7
1 selects “engine speed” from the data acquired from the pump 1 and outputs the selected value to the display output circuit 76. As a result, the lamp of the “rpm” portion is turned on in the unit display section 60 of the operation display panel 18, and a numerical value such as “3000” is displayed on the numerical value display section 58.

In this case, in this system, all controllers 3 including one pump have the same relationship, and the same operation and display can be performed by all controllers 3. Therefore, even when the pump 1 is located away from the fire site, it is possible to control the pump 1 from an optimal position from near the site to the pump main unit. Note that the priorities between the controllers 3 are not set, and when commands conflict, the preceding command has priority. However, priorities are set for the contents of the commands themselves, and the commands on the safe side always take precedence. For example, when the engine start command and the engine stop command conflict at the same time or within a predetermined time, the stop command has priority and the engine is not started.

As described above, in this system, a network is constructed using the twisted pair wires 2 which are inexpensive and lightweight, and which are easy to lay with high attenuation and noise, and the controller 3 controls the communication of the pump 1. This makes it possible to perform advanced remote control with simpler wiring than before. Therefore, it is possible to control not only the independently installed pump 1 as shown in FIG. 1 but also the pump of a portable pump loading vehicle from a remote place while monitoring the operation state thereof.

As described above, the invention made by the inventor has been specifically described based on the embodiments. However, the present invention is not limited to the above embodiments, and various modifications can be made without departing from the gist of the invention. Needless to say,

For example, in the above-described embodiment, a portable fire pump has been described as an example. However, a pump to which the operation mode control device of the present invention can be applied is not limited thereto.
The present invention is applicable to various types of pumps, such as a vehicle-mounted type, a facility type, and a facility installation type.

[0053]

In the operation mode control device for a fire-fighting pump according to the present invention, when the operation mode is switched by the operation mode switching key, the determination of the operation mode after the mode switching is delayed for a predetermined time. Even if it is not determined at the same time as switching and other modes can not be selected without going through the automatic relay water supply mode,
The mode can be easily shifted to the mode after the automatic relay water supply mode. Therefore, even when the input water pressure exceeds the pump starting water pressure, the mode is not immediately determined as “automatic relay water supply” when the automatic relay water supply mode is selected. Therefore, it is possible to easily shift to another mode via the automatic relay water supply mode, and it is possible to freely select a mode.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing an overall configuration of a firefighting pump control system to which a firefighting pump using an operation mode control device according to an embodiment of the present invention is applied.

FIG. 2 is an explanatory diagram showing a configuration of a control system in the system of FIG.

FIG. 3 is an explanatory diagram illustrating a configuration of an operation display unit.

FIG. 4 is a table showing an example of an error code.

FIG. 5 is an explanatory diagram showing an example of a pulse voltage applied to control of a throttle drive motor.

FIG. 6 is an explanatory diagram showing a signal configuration in the p-CSMA system.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Fire pump 11 Operation control circuit (mode determination delay means) 18 Operation display panel 30 Water pressure detection sensor 54 Operation mode switching key (operation mode switching means) 57 Mode display lamp

Claims (1)

[Claims] An automatic relay water supply mode in which a plurality of fire pumps are connected in series to perform water supply from a water source and perform water supply from a water supply pump at a preceding stage and automatically start operation. An operation mode control device for a fire pump having: an operation mode switching unit that switches a plurality of operation modes of the fire pump including the automatic relay water supply mode; and when the operation mode is switched by the operation mode switching unit, An operation mode control device for a fire pump, comprising: mode determination delay means for delaying the determination of the operation mode after the mode switching for a predetermined time.