Auxiliary pressurization pump device and fire extinguishing equipment

Abstract

To provide an auxiliary pressurization pump device and fire extinguishing equipment capable of preventing chattering.SOLUTION: An auxiliary pressurization pump device 2 connected to a piping 123 connecting a fire extinguishing pump device 1 and water discharge means 3 comprises: a motor 121; a pump 122 connected to the motor 121 and configured to pressurize inside the piping 6 and 123; a pressure detector 113 provided between the piping 123 and the pump 122; a storage unit 131 storing a preset stop time, which is a stop time from when the motor 121 stops until the motor 121 starts next, and a preset acceleration time, which is an acceleration time of the motor 121 from when the motor 121 starts until the piping 123 reaches a predetermined pressure; and a control unit 133 that starts the motor 121 at an acceleration time at which a starting operation becomes gentler than the starting operation based on the preset acceleration time stored in the storage unit 131, when the measured stop time is equal to or less than the preset stop time.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to an auxiliary pressure pump device for maintaining pressure in a pipe and a fire extinguishing system. [Background technology]

[0002] BACKGROUND ART Fire extinguishing equipment that includes a fire pump device and an auxiliary booster pump device that supply water to water discharge means such as sprinklers in the event of a fire in a building has been known (see, for example, Patent Document 1).

[0003] A known technique for such fire extinguishing equipment is to monitor the pressure in the piping between the fire pump unit and the water discharge means, and to keep the pressure in the piping constant by driving an auxiliary booster pump unit when the pressure in the piping drops. Also known is a technique for controlling the pump of the auxiliary booster pump unit by inverter drive (see, for example, Patent Document 2). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 6509606 [Patent Document 2] Patent Publication No. 2021-016748 Summary of the Invention [Problem to be solved by the invention]

[0005] The auxiliary booster pump device of the fire extinguishing equipment described above uses a pressure detector installed in the auxiliary booster pump device to detect the pressure in the piping between the fire pump device and the water discharge means. Therefore, depending on the piping conditions and corrosion conditions in the piping, when the auxiliary booster pump device is started and pressurized water is supplied to the piping, the pressure detected by the pressure detector may reach the desired pressure before the pressure in the entire piping reaches the desired pressure, causing the auxiliary booster pump device to stop. Then, since the pressure in the piping has not been increased to the desired pressure, there is a risk of the auxiliary booster pump device starting again, which is called chattering.

[0006] SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide an auxiliary pressure pump device and a fire extinguishing facility that are capable of preventing chattering. [Means for solving the problem]

[0007] According to one aspect of the present invention, the auxiliary booster pump device is an auxiliary booster pump device connected to a pipe connecting a fire pump device and a water discharge means, and comprises: a motor; a pump connected to the motor and increasing the pressure in the pipe; a pressure detector provided between the pipe and the pump; a memory unit that stores a preset set stop time, which is the stop time from when the motor stops until the next start of the motor; and a preset set acceleration time, which is the acceleration time of the motor from when the motor starts until the pipe reaches a predetermined pressure; and a control unit that, when the measured stop time is less than the set stop time, starts the motor with the acceleration time that results in a slower start operation than the start operation based on the set acceleration time stored in the memory unit. [Effects of the Invention]

[0008] According to the present invention, it is possible to provide an auxiliary pressure pump device and a fire extinguishing facility that are capable of preventing chattering. [Brief explanation of the drawings]

[0009] [Figure 1] 1 is an explanatory diagram illustrating a schematic configuration of a fire extinguishing facility using an auxiliary pressure pump device according to an embodiment of the present invention. [Figure 2] FIG. 4 is an explanatory diagram showing an example of a control method for the auxiliary pressure pump device. DETAILED DESCRIPTION OF THE INVENTION

[0010] The configuration of a fire extinguishing facility 100 using an auxiliary pressure pump device 2 according to an embodiment of the present invention will be described below with reference to Figures 1 and 2. Figure 1 is an explanatory diagram that schematically shows the configuration of a fire extinguishing facility 100 using an auxiliary pressure pump device 2 according to an embodiment of the present invention, and Figure 2 is a flowchart that shows an example of a method for controlling the auxiliary pressure pump device 2.

[0011] The fire extinguishing system 100 includes a fire pump unit 1, an auxiliary booster pump unit 2, a water discharge means 3, a water supply source 5, and piping 6 connecting the fire pump unit 1 and the water discharge means 3. The fire extinguishing system 100 is installed in a structure such as a building, and when a fire is detected, the fire extinguishing system 1 starts up while discharging water from the water discharge means 3.

[0012] As shown in FIG. 1, the fire pump system 1 includes a pump unit 12, a discharge pipe 13, a pressure tank 14, and a control panel 18.

[0013] The pump unit 12 includes a pump 21 and a motor 22. The pump 21 houses an impeller fixed to a rotary shaft therein. The pump 21 discharges pressurized water to the secondary side.

[0014] The motor 22 is formed so that its rotary shaft can rotate. The motor 22 rotates the rotary shaft to drive the impeller of the pump 21. The motor 22 is electrically connected to the control panel 18 via a power line.

[0015] One end of the discharge pipe 13 is connected to the discharge port of the pump 21, and the other end is connected to the piping 6. The discharge pipe 13 has a check valve 13a and a pressure detector 33. The pressure detector 33 is connected to the control panel 18 via a signal line. The pressure detector 33 detects the pressure inside the discharge pipe 13 and transmits it to the control panel 18. For example, the pressure detector 33 is connected to the pressure tank 14, and detects the pressure inside the discharge pipe 13 from the pressure inside the pressure tank 14.

[0016] The pressure tank 14 is formed so as to be able to store water at a predetermined pressure discharged from the pump 21. The pressure tank 14 is provided in the discharge pipe 13, for example.

[0017] The control panel 18 includes, for example, a control unit, a memory unit, an alarm unit, and a communication unit. The control unit is configured to be able to drive the motor 22. The control unit is configured to be able to drive the motor 22 when it determines that a fire has occurred. As a specific example, when the control unit detects that the pressure of the pressure detector 33 is equal to or lower than the starting pressure and receives a start signal for the pump unit 12, it drives the motor 22 in accordance with the program stored in the memory unit.

[0018] The memory unit stores, for example, the starting pressure for starting the pump unit 12, the shut-off head during shut-off operation, and a control program for the pump unit 12 in the event of a fire and during each inspection operation.

[0019] The notification unit is configured to notify the outside of an abnormality that occurs in the pump unit 12 based on information transmitted from the control unit. The notification unit is a display unit that displays information. The notification unit includes, for example, a lamp that displays information by lighting up or flashing, a sound source that notifies the outside of information by sound, and a display that displays information.

[0020] The communication unit is configured to be able to send and receive information to and from the outside. For example, the communication unit outputs information sent from the control unit to the outside wirelessly or via a wired connection. For example, the communication unit transmits information to an external terminal. In other words, the control unit sends and receives information to and from the external terminal via the communication unit via a network such as the Internet or a LAN (Local Area Network), or via a wireless or wired cable.

[0021] The auxiliary pressure pump device 2 is a pump device that automatically operates before the fire pump device 1 starts when the pressure in the piping 6 connected to the water discharge means 3 drops, and restores the pressure in the piping 6.

[0022] The auxiliary pressure pump device 2 includes, for example, an auxiliary pump unit 111, a pressure tank 112 provided on the secondary side of the auxiliary pump unit 111, a pressure detector 113 connected to the pressure tank 112, a water tank 114, and a control panel 115.

[0023] The auxiliary pump unit 111 includes an auxiliary motor 121, an auxiliary pump 122 driven by the auxiliary motor 121, and a connecting pipe (piping) 123 connected to the auxiliary pump 122. The auxiliary motor 121 is electrically connected to a control panel 115. The auxiliary motor 121 is configured so that its drive frequency can be changed, for example, so that it can be driven by an inverter. The primary side of the auxiliary pump 122 is connected to the water tank 114, and the secondary side is connected to the connecting pipe 123. The connecting pipe 123 connected to the auxiliary pump 122 is connected to the piping 6 that connects the pump 21 and the water discharge means 3 of the fire pump system 1. More specifically, the connecting pipe 123 is connected to the primary side of a water flow detector 314 of the piping 6, which will be described later.

[0024] The pressure tank 112 is provided on the connecting pipe 123. The pressure tank 112 is formed so as to be able to store water discharged from the auxiliary pump 122 at a predetermined pressure.

[0025] The pressure detector 113 detects the pressure between the pipe 6 and the backing pump 122. That is, the pressure detector 113 detects the pressure in the connecting pipe 123. For example, the pressure detector 113 is provided in the connecting pipe 123. The pressure detector 113 is electrically connected to the control panel 115. The pressure detector 113 transmits a signal of the detected pressure value to the control panel 115. The water tank 114 is a water source for the backing pump unit 111.

[0026] The control panel 115 includes, for example, a memory unit 131, an alarm unit 132, and a control unit 133. The memory unit 131 stores, for example, a starting pressure for starting the auxiliary pump unit 111 and a stopping pressure for stopping the auxiliary pump unit 111. The starting pressure is set higher than the starting pressure of the pump unit 12 of the fire pump system 1. The stopping pressure is set lower than the shutoff pressure of the fire pump system 1. The memory unit 131 also stores a set acceleration time for accelerating the auxiliary motor 121 when starting the auxiliary pump 122, and a set stop time, which is a predetermined time from when the auxiliary motor 121 is stopped until the auxiliary motor 121 is started again.

[0027] For example, the set acceleration time is a time for the auxiliary motor 121 to accelerate from the start of the auxiliary pump 122 (auxiliary motor 121) until it reaches a predetermined rotation speed at which the reduced pressure in the piping 6 recovers (reaches) the desired pressure, and is set in advance. The set stop time is a stop time from when the auxiliary motor 121 is stopped until it is started again, and is a time interval that can determine that there is little possibility of so-called chattering, in which the auxiliary motor 121 starts and stops in a short period of time, occurring, and is set in advance. Here, chattering refers to a situation in which, even if the desired pressure is detected by the pressure detector 113, the pressure on the secondary side of the position where the pressure detector 113 is installed is not increased to the desired pressure due to reasons such as a long piping distance between the fire pump unit 1 and the auxiliary booster pump unit 2 or a small inner diameter of the piping 6, and the pressure detected by the pressure detector 113 immediately after the auxiliary pump 122 is stopped drops to the start pressure, and the auxiliary pump 122 is restarted to recover the pressure to the desired pressure in response to the pressure drop, i.e., pressure fluctuations occur repeatedly. Therefore, the set stop time is the time for determining whether the inside of the piping 6 has been sufficiently pressurized when the auxiliary pump 122 is started at the acceleration time stored in the memory unit 131 and then stopped. If the time during which the pressure reaches or exceeds the next starting pressure after the auxiliary pump 122 is stopped is shorter than the set stop time, this means that the acceleration time is fast and the pressure in the pressure detector 113 increases significantly before the pressure in the piping 6 increases to the desired pressure.

[0028] The storage unit 131 also stores a program that can control the frequency of the auxiliary motor 121 based on the set acceleration time, a program that determines whether chattering of the auxiliary motor 121 has occurred, and the like.

[0029] The notification unit 132 is configured to be able to notify information to the outside. The notification unit 132 includes at least one of a lamp such as an LED that notifies the outside with light by lighting or flashing, a display device such as a segment display or liquid crystal display that notifies the outside with characters or symbols, a sound source such as a horn or speaker that notifies the outside with sound, and a communication unit that transmits information to an external terminal wirelessly or via a wired connection.

[0030] When the control unit 133 determines that the pressure detected by the pressure detector 113 is equal to or lower than the start pressure stored in the memory unit 131, it starts the auxiliary pump unit 111, increases the frequency of the auxiliary motor 121 (the rotation speed of the auxiliary pump 122), and increases the secondary side pressure of the auxiliary pump unit 111. Furthermore, when the control unit 133 determines that the pressure detected by the pressure detector 113 during operation of the auxiliary pump unit 111 is equal to or higher than the stop pressure stored in the memory unit 131, it stops the auxiliary pump unit 111.

[0031] The control unit 133 performs frequency control at least at the start of the auxiliary motor 121 based on the acceleration time stored in the memory unit 131. The control unit 133 also measures a stop time, which is the time from when the auxiliary motor 121 stops until the next start of the auxiliary motor 121, and compares the measured stop time with a set stop time stored in the memory unit 131 to determine whether chattering has occurred. The control unit 133 is also configured to be able to change the set acceleration time when it determines that chattering may occur based on the stop time, so that the next start operation of the auxiliary motor 121 (auxiliary pump 122) is slower than the previous start operation. The set acceleration time is changed based on, for example, a correction value that is stored in advance in the memory unit 131 and that increases the acceleration time. That is, the correction value is, for example, an increase rate or increase value of the time required for the frequency of the auxiliary motor 121 (the rotation speed of the auxiliary pump 122) to reach a predetermined frequency (rotation speed) from the start of startup. Changing (correcting) the set acceleration time based on the correction value lengthens the acceleration time of the auxiliary motor 121 stored as the set acceleration time. Furthermore, the control unit 133 changes the set acceleration time stored in the storage unit 131 to a new set acceleration time based on the correction value, and sets this as the set acceleration time to be used for subsequent startups. Note that, for example, the storage unit 131 may overwrite the set acceleration time before the change with the new set acceleration time. Alternatively, the storage unit 131 may store the set acceleration times before and after the change, and the control unit 133 may select the new set acceleration time as the acceleration time to be used next time. Furthermore, the control unit 133 stores in the storage unit 131 a change history, such as the value of the changed set acceleration time and the date and time of the change. Furthermore, the control unit 133 controls the notification unit 132 based on the number of changes in the set acceleration time and the value of the set acceleration time to externally notify information about changes in the set acceleration time and deterioration of the piping condition such as clogging of the piping due to rust over time, etc. For example, in order to determine deterioration of the piping condition, etc., a threshold value based on the number of changes in the set acceleration time, the value of the set acceleration time, etc. is stored in the memory unit 131.

[0032] The water discharge means 3 is, for example, a plurality of water dischargers provided on each floor of a building, or piping connected to other water discharge devices such as sprinklers. The water discharge means 3 is opened in the event of a fire to discharge water for fire extinguishing. As a specific example, the water discharge means 3 includes, for example, a plurality of sprinklers 211.

[0033] The sprinkler 211 includes an installation pipe 211a that branches off from and is connected to the piping 6 and is installed on each floor, and a plurality of sprinkler heads 211b that are installed on the installation pipe 211a and are installed on each floor. The sprinkler 211 may also include a detector that can detect the amount of water (flow rate) and pressure between the installation pipe 211a and the sprinkler head 211b.

[0034] The sprinkler head 211b has a water outlet that can be opened by heat in the event of a fire, for example, to discharge water onto the floor of a building.

[0035] When water flows at a predetermined flow rate or velocity in the piping 6, a switch provided inside the water flow detector 314 is activated and issues a start signal for the pump unit 12 to the control panel 18. The switch provided inside the water flow detector 314 is, for example, a push-type microswitch, a paddle switch, or a pressure switch provided in the water flow detector 314 and on the secondary side of a valve provided inside the water flow detector 314.

[0036] The water supply source 5 is a water tank for fire extinguishing. The water supply source 5 is provided on the primary side of the fire pump device 1.

[0037] A water flow detector 314 is provided on the piping 6. The piping 6 is provided on the secondary side of the fire pump unit 1 and the auxiliary booster pump unit 2, and joins on the primary side of the water flow detector 314 and is connected to a sprinkler 211. The piping 6 is closed by the sprinkler 211 at the end or midway.

[0038] Next, a control method for the auxiliary pump unit 111 used in the fire extinguishing system 100 configured as described above will be described with reference to FIG.

[0039] First, while the auxiliary pump 122 is stopped, the control unit 133 determines whether the pressure value detected by the pressure detector 113 is equal to or lower than the start pressure (step ST1). If the pressure value detected by the pressure detector 113 is higher than the start pressure (No in step ST1), the control unit 133 continues to monitor the pressure. If the pressure value detected by the pressure detector 113 is equal to or lower than the start pressure (Yes in step ST1), the control unit 133 performs a start-up operation of the auxiliary pump 122 for the set acceleration time stored in the memory unit 131 (step ST2). Specifically, the control unit 133 controls the auxiliary motor 121 to increase the frequency of the auxiliary motor 121 from the start of start-up to a predetermined frequency over the time set in the set acceleration time, thereby starting the auxiliary pump 122. After the auxiliary pump 122 is started, the control unit 133 determines whether the pressure value detected by the pressure detector 113 is equal to or higher than the stop pressure (step ST3). If the pressure value detected by the pressure detector 113 is lower than the stop pressure (No in step ST3), the driving of the auxiliary pump 122 continues and pressure monitoring continues. If the pressure value detected by the pressure detector 113 is equal to or higher than the stop pressure (Yes in step ST3), the auxiliary motor 121 is controlled to stop the auxiliary pump 122, and flag 1, which is a flag for starting measurement of the stop time based on the stop of the auxiliary pump 122, is set (step ST4), and measurement of the time the auxiliary pump 122 is stopped (stop time) starts (step ST11).

[0040] Next, the control unit 133 determines whether the pressure value detected by the pressure detector 113 is equal to or less than the start pressure while the auxiliary pump 122 is stopped (step ST5). If the pressure value detected by the pressure detector 113 is greater than the start pressure (No in step ST5), the control unit 133 continues monitoring the pressure. If the pressure value detected by the pressure detector 113 is equal to or less than the start pressure (Yes in step ST1), the control unit 133 starts the auxiliary pump 122 at the set acceleration time stored in the storage unit 131 and sets flag 2, which is a measurement stop flag for the start and stop time of the auxiliary pump 122 (step ST6). Note that for convenience of explanation, flag 1 and flag 2 have been described, but flag 1 and flag 2 are actually variables such as "1," "0," "true," and "false," which indicate the start and stop states of time measurement from when the auxiliary pump 122 is stopped until it is started again.

[0041] Furthermore, in step ST6, the starting of the auxiliary pump 122 and the setting of flag 2 may be performed simultaneously, or the starting of the auxiliary pump 122 may be initiated after a predetermined condition is met, such as after a predetermined time has elapsed after flag 2 is set.Furthermore, flag 2 may be set after the starting of the auxiliary pump 122 has begun but before the target rotation speed at which the auxiliary pump 122 is driven is reached and while the set acceleration time is changeable, and then the starting operation may be performed using the changed set acceleration time.

[0042] Based on flag 2, the control unit 133 stops measuring the stop time (step ST12), compares the measured stop time with the set stop time stored in the memory unit 131, and determines whether the stop time is equal to or shorter than the set stop time (step ST13). That is, the control unit 133 determines the occurrence of chattering from the time from when the auxiliary pump 122 was stopped last time until the auxiliary pump 122 is started.

[0043] If the measured stop time is equal to or shorter than the set stop time (Yes in step ST13), it is determined that chattering is likely occurring, that is, the pressure in the pipe 6 was not increased to the desired pressure when the auxiliary pump 122 was last driven and then stopped, and there was a pressure fluctuation in the pipe 6 after the auxiliary pump 122 was stopped (step ST14). The control unit 133 changes the set acceleration time stored in the memory unit 131 so as to perform a slower start-up operation of the auxiliary pump 122 than the previous start-up operation. For example, the control unit 133 increases the set acceleration time based on the correction value, changes and stores the new set acceleration time in the memory unit 131, and starts the auxiliary pump 122 at the changed set acceleration time in step ST6.

[0044] If the measured stop time is longer than the set stop time (No in step ST13), it is determined that chattering has not occurred, that is, when the auxiliary pump 122 was last driven and then stopped, the pressure in the pipe 6 was increased to the desired pressure, and there was no pressure fluctuation in the pipe 6 after the auxiliary pump 122 was stopped (step ST15). In order to perform the same start-up operation of the auxiliary pump 122 as the last start-up operation, the control unit 133 starts the auxiliary pump 122 with the set acceleration time stored in the memory unit 131 in step ST6 without changing the set acceleration time stored in the memory unit 131.

[0045] Then, the control unit 133 returns to step ST3 and repeats the subsequent steps. Note that, if the set acceleration time is changed in response to Yes in step ST13, the control unit 133 performs the start-up operation of the auxiliary pump 122 using the new set acceleration time stored in the memory unit 131 from the next time onwards when starting the auxiliary pump 122 until the next time Yes is determined in step ST13.

[0046] The auxiliary booster pump device 2 and fire extinguishing equipment 100 configured in this manner measure the time from when the auxiliary pump 122 is stopped until the next start, and compare the stopped time with a set stop time to determine whether or not there is a pressure fluctuation after the auxiliary pump 122 is stopped, i.e., whether chattering has occurred. If it is determined that chattering has occurred, the auxiliary booster pump device 2 starts up the auxiliary pump 122 in a gentle manner. This allows the auxiliary booster pump device 2 to suppress the occurrence of chattering.

[0047] Furthermore, chattering can be suppressed by changing the software. Therefore, by changing the set stop time and set acceleration time preset in the memory unit 131, it is possible to set the shortest set acceleration time according to the piping conditions at each site, that is, the operating time for increasing the pressure to the desired pressure when the pressure in the piping drops.

[0048] That is, the preferable operation time (acceleration time) varies depending on the diameter, length, etc. of the secondary piping of the fire pump unit 1, the size of the building, the type of fire extinguishing equipment 100, and the piping volume between the fire pump unit 1 and the water discharge means 3. In addition, making the acceleration time too long is not preferable from the viewpoint of energy saving, since it increases the operation time of the auxiliary pressure pump unit 2.

[0049] However, the auxiliary booster pump device 2 is configured to be able to change the set values ​​of the set stop time and set acceleration time depending on the piping condition at the site, and to determine pressure fluctuations based on the time from when the auxiliary pump 122 is stopped to when it is next started, and to change the set acceleration time based on a correction value. Therefore, by reducing the correction value, the set acceleration time can be repeatedly corrected even if the piping condition changes due to aging or piping conditions, so that an appropriate set acceleration time can be set while suppressing an increase in operating time. Furthermore, because the above functions can be updated or added to such an auxiliary booster pump device 2 by changing the set values ​​or changing the software, existing auxiliary booster pump devices 2 and fire extinguishing equipment 100 can be used, and the cost of application can be suppressed.

[0050] Furthermore, by recording the history of changes to the set acceleration time in the memory unit 131, the control unit 133 can notify or warn the outside, for example, a management center or a maintenance company, of deterioration of the piping condition due to aging, using the notification unit 132. In particular, since the fire extinguishing equipment 100 is a preparation for fires, maintenance and equipment updates are required before a malfunction occurs, and since deterioration of the piping condition can be predicted based on the history of changes to the set acceleration time, safety can be ensured.

[0051] As described above, the auxiliary pressure pump device 2 and the fire extinguishing equipment 100 according to this embodiment can prevent chattering.

[0052] The present invention is not limited to the above-described embodiments, and various modifications can be made in the implementation stage without departing from the spirit of the invention. Furthermore, the embodiments may be implemented in appropriate combinations, in which case the combined effects can be obtained. Furthermore, the above-described embodiments include various inventions, and various inventions can be extracted by combining selected elements from the disclosed elements. For example, if the problem can be solved and the desired effect can be obtained even if some elements are deleted from all elements shown in the embodiments, the configuration from which these elements are deleted can be extracted as an invention. [Explanation of symbols]

[0053] 100...fire extinguishing equipment, 1...fire pump device, 2...auxiliary pressure pump device, 3...water discharge means, 5...water supply source, 6...piping, 12...pump unit, 13...discharge pipe, 13a...check valve, 14...pressure tank, 18...control panel, 21...pump, 22...motor, 33...pressure detector, 111...auxiliary pump unit, 112...pressure tank, 113...pressure detector, 114...water tank, 115...control panel, 121...auxiliary motor (motor), 122...auxiliary pump (pump), 123...connecting pipe, 131...memory unit, 132...alarm unit, 133...control unit, 211...sprinkler, 211a...installation pipe, 211b...sprinkler head, 314...flow detector.

Claims

1. An auxiliary pressure pump device connected to a pipe connecting the fire pump device and the water discharge means, A motor; a pump connected to the motor for increasing pressure in the piping; a pressure detector provided between the piping and the pump; a storage unit that stores a preset stop time, which is a time from when the motor is stopped until when the motor is started again, and a preset acceleration time, which is an acceleration time of the motor from when the motor is started until the piping reaches a predetermined pressure; a control unit that starts the motor with an acceleration time that is slower than the start-up operation based on the set acceleration time stored in the storage unit when the measured stop time is equal to or shorter than the set stop time; An auxiliary pressure pump device comprising:

2. 2. The auxiliary pressure pump device according to claim 1, wherein the control unit changes the acceleration time for the gradual start-up operation to the set acceleration time and stores the set acceleration time in the storage unit.

3. 3. The auxiliary pressure pump device according to claim 2, wherein the control unit stores a history of changes to the set acceleration time in the storage unit and notifies the change history to an external device.

4. a fire pump device; a piping connecting the fire pump device and the water discharge means; an auxiliary pressure pump device according to any one of claims 1 to 3, which is connected to the piping; Fire extinguishing equipment.

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