JP7370754B2 - Auxiliary pressure pump device and control panel - Google Patents

Description

The present invention relates to an auxiliary pressurizing pump device and a control panel.

In sprinkler fire extinguishing equipment, the fire pipe that runs from the fire pump device to the sprinkler head is normally filled with water at a predetermined pressure when the sprinkler is not in use, and a pressure retainer is used to maintain the pressure inside the fire pipe. A pressure tank is provided. However, due to natural reduction of water in fire pipes or air in pressure tanks, water leakage due to metal corrosion of pipes, leakage of piping due to thermal expansion or air pockets, leakage due to poor piping construction, etc., accidents other than fires may occur. This may cause the pressure inside the fire pipe to decrease.

For the purpose of compensating for the pressure drop in the fire pipe due to causes other than the above-mentioned fire outbreak and maintaining the pressure while the sprinkler is not in use, as shown in Patent Document 1, a fire pump that can be driven by an electric motor with a lower output than the fire pump is used. Auxiliary pressurized pump equipment is installed separately from the fire pump. The auxiliary pressurizing pump device is a pump that is activated before the fire pump starts and pressurizes the fire pipe in order to maintain the pressure inside the fire pipe for the sprinkler.

On the other hand, a flowing water detection device used in fire extinguishing equipment such as sprinkler equipment is a device that automatically detects a flowing water phenomenon within the main body and issues a signal or alarm. A water flow detection device does not issue a signal or alarm even if water starts flowing at an inoperable water volume (defined as the maximum flow volume within the main unit that does not issue a signal or alarm; the same shall apply hereinafter) at the minimum operating pressure. For example, it is known that if water in excess of the inactivated amount continues to pass through the main body for a predetermined delay time or more, the device will activate and issue a fire alarm.

Utility model registration No. 3003174

When the auxiliary pressurizing pump starts, the water discharged by the auxiliary pressurizing pump may cause the running water detection device to operate unintentionally, causing a false fire alarm to be triggered due to the operation of the running water detection device. For example, there is a problem in that a fire breaks out in an office building or the like is broadcast throughout the building. On the other hand, there are cases where it is desired to temporarily operate the auxiliary pressurizing pump with a large amount of water regardless of the amount of water inactive in the water flow detection device. For example, fire pipes and pressure tanks that have drained water during installation or maintenance need to be filled with water again and further pressurized (filled with water) to a predetermined pressure, and an auxiliary pressure pump is used to fill the water. There may be cases where If there is no problem even if a fire alarm is erroneously issued during such installation or maintenance, there is a desire to operate with as large a water volume as possible regardless of the inactive water volume and to shorten the water filling time. In addition, the inoperable water volume and delay time of the flowing water detection device vary depending on the product specifications, so when the flowing water detection device is replaced due to maintenance etc., the discharge amount of the auxiliary pressure pump can be increased or decreased according to the specifications of the replaced water detection device. There are also requests to do so.

The present invention has been made in view of the above problems, and provides an auxiliary pressurizing pump device and a control panel that can increase and decrease the discharge amount while suppressing the unintentional operation of the flowing water detection device. The purpose is to

The auxiliary pressurizing pump device according to the first aspect of the present invention has a pressure inside a fire extinguishing pipe equipped with a flowing water detection device that detects a predetermined water flowing phenomenon caused by the fire extinguishing pump and changes a signal or alarm from an OFF state to an ON state. An auxiliary pressurizing pump device for pumping fluid into the fire extinguishing pipe in order to maintain the fire extinguishing pipe, the device includes a pump and flowing water adjusting means for increasing or decreasing the discharge amount of the pump, and the flowing water adjusting means is configured to adjust the discharge amount of the pump. The amount of water is adjusted such that the signal or alarm issued by the water flow detection device remains off.

According to this configuration, it is possible to suppress unintended operation of the flowing water detection device due to activation of the auxiliary pressure pump, and prevent false alarms from being issued. Further, by adjusting the water flow adjustment means, the discharge amount of the auxiliary pressurizing pump is increased or decreased, so that operation can be performed with as much water as possible if necessary. Further, the piping equipment can be simplified compared to providing a constant water flow valve or the like in the fire extinguishing equipment on the secondary side of the auxiliary pressurizing pump device.

An auxiliary pressurization pump device according to a second aspect of the present invention is the auxiliary pressurization pump device according to the first aspect, and includes an electric motor that drives the pump, and the water flow adjustment means is configured to control the flow rate of the electric motor. An inverter is a speed change means, and the inverter changes the rotational speed of the electric motor so that the discharge amount of the pump becomes a water amount that maintains the signal or alarm issued by the flowing water detection device in an OFF state. be adjusted.

According to this configuration, the rotational speed of the electric motor can be lowered from the normal operating rotational speed to a rotational speed that is equal to or lower than the inoperable water amount of the flowing water detection device provided in the fire pipe by the inverter serving as the flowing water adjustment means. , it is possible to suppress unintended operation of the flowing water detection device due to activation of the auxiliary pressure pump, and prevent false alarms from being issued. Further, by changing the rotational speed of the electric motor of the auxiliary pressure pump using an inverter, the discharge amount of the auxiliary pressure pump can be increased or decreased. In addition, by lowering the rotational speed of the motor of the auxiliary pressurizing pump using an inverter, it is possible to reduce power consumption and achieve energy-saving pressurized operation, and also has the effect of reducing noise and vibration compared to conventional products.

An auxiliary pressurizing pump device according to a third aspect of the present invention is the auxiliary pressurizing pump device according to the second aspect, in which the auxiliary pressurizing pump device according to the second aspect is configured to control the inverter to change the rotational speed of the electric motor. a control unit that adjusts the amount of water discharged so that the signal or alarm issued by the running water detection device is maintained in an OFF state, and the signal or alarm issued by the running water detection device is maintained in an OFF state. The controller includes a memory that stores, as a first rotation speed, a rotation speed of the electric motor that is less than or equal to a first water flow rate determined as a maximum water flow rate in the main body, The inverter is controlled to operate at a rotational speed.

An auxiliary pressurization pump device according to a fourth aspect of the present invention is the auxiliary pressurization pump device according to the third aspect, comprising an input interface that receives the first water amount of the flowing water detection device, and the control unit determines the first rotational speed according to the first amount of water received by the input interface.

The auxiliary pressure pump device according to a fifth aspect of the present invention is the auxiliary pressure pump device according to either the third or fourth aspect, wherein the rotational speed of the electric motor is equal to or lower than the first rotational speed. .

The auxiliary pressurizing pump device according to a sixth aspect of the present invention is the auxiliary pressurizing pump device according to the third or fourth aspect, in which the flowing water detecting device detects that a water amount larger than the first water amount is detected in the main body. The controller determines that the flowing water phenomenon has been detected when the water continues to pass through the water for more than a predetermined delay time, and the control unit determines that the water flowing phenomenon has been detected when the water continues to pass through the pump for a predetermined delay time or more, A time period during which the rotational speed is equal to or greater than one rotational speed is measured, and when the timer reaches the first time or more, the rotational speed of the electric motor is changed to a value equal to or less than the first rotational speed.

An auxiliary pressure pump device according to a seventh aspect of the present invention is the auxiliary pressure pump device according to the sixth aspect, and includes an input interface that receives the delay time of the flowing water detection device,
The control unit determines the first time according to the delay time accepted by the input interface.

The auxiliary pressure pump device according to an eighth aspect of the present invention is the auxiliary pressure pump device according to any one of the third to seventh aspects, and is characterized in that the relationship between the first water amount and the rotational speed of the electric motor is The control unit further includes a memory storing a relationship between a lift curve and a rotational speed of the electric motor, and the control unit refers to the memory to correspond to the first water amount of the flowing water detection device provided in the fire pipe. The first rotational speed is determined.

An auxiliary pressurizing pump device according to a ninth aspect of the present invention is the auxiliary pressurizing pump device according to the eighth aspect, which controls the discharge amount at a predetermined total head below a predetermined auxiliary pressurizing pump starting pressure. 2 water amounts, and the control unit sets the maximum rotation speed to the first rotation speed under the condition that the second water amount is equal to or less than the first water amount among the rotation speeds of the plurality of electric motors stored in the memory. decide.

The auxiliary pressurization pump device according to a tenth aspect of the present invention is the auxiliary pressurization pump device according to the eighth aspect, in which a cut-off head is determined among the rotational speeds of the plurality of electric motors stored in the memory. A minimum rotational speed is determined as the first rotational speed under the condition that the rotational speed is higher than a predetermined auxiliary pressure pump stop pressure.

The auxiliary pressure pump device according to an eleventh aspect of the present invention is the auxiliary pressure pump device according to any one of the third to tenth aspects, and comprises The relationship between the rotational speed of the electric motor is such that the discharge amount is less than or equal to the first water amount at a point where the total head is zero, or the relationship between the first water amount and the discharge amount is the first water amount at a point where the total head of the auxiliary pressurizing pump device is zero. The control unit further includes a memory storing a relationship between rotational speeds of the electric motor that is equal to or less than 1 water volume, and the control unit refers to the memory and selects a rotational speed that is installed in the fire pipe from among the stored rotational speeds. A rotational speed of the electric motor corresponding to the type of flowing water detection device or the first amount of water is acquired, and the acquired rotational speed is determined as the first rotational speed.

The auxiliary pressurizing pump device according to a twelfth aspect of the present invention is the auxiliary pressurizing pump device according to any one of the third to eleventh aspects, wherein the control unit controls the pressure on the discharge side of the pump. When the pressure on the discharge side of the pump becomes equal to or higher than the auxiliary pressurization pump starting pressure, the pump is stopped, and the electric motor starts. After the inverter is started by setting the rotational speed to the first rotational speed or less, the inverter is controlled to gradually increase the rotational speed.

The auxiliary pressurization pump device according to a thirteenth aspect of the present invention is the auxiliary pressurization pump device according to the twelfth aspect, in which controlling the inverter to gradually increase the rotation speed of the pump The purpose is to count the operating time and shorten the acceleration time, which is a parameter of the inverter, in proportion to the counted operating time.

The auxiliary pressure pump device according to a fourteenth aspect of the present invention is the auxiliary pressure pump device according to the twelfth aspect, in which, during operation of the pump, the control unit controls the pressure on the discharge side of the pump. Controlling the rotational speed so that the rotational speed matches a predetermined target pressure, and controlling the inverter to gradually increase the rotational speed means that the rotational speed is proportional to the deviation between the target pressure and the discharge side pressure at that point. The purpose of this invention is to shorten the acceleration time, which is a parameter of the inverter.

The auxiliary pressurization pump device according to a fifteenth aspect of the present invention is the auxiliary pressurization pump device according to any one of the twelfth to fourteenth aspects, in which the control unit controls the pump during operation of the pump. Controlling the rotational speed so that the pressure on the discharge side matches a predetermined target pressure, and controlling the inverter to gradually increase the rotational speed means that the target pressure is equal to the starting pressure of the auxiliary pressurizing pump. to the stop pressure of the auxiliary pressurizing pump over a predetermined period of time.

The auxiliary pressurization pump device according to a sixteenth aspect of the present invention is the auxiliary pressurization pump device according to any one of the twelfth to fourteenth aspects, in which the control unit controls the pump during operation of the pump. Controlling the rotational speed so that the pressure on the discharge side matches a predetermined target pressure, and controlling the inverter to gradually increase the rotational speed means When the pressure reaches one target pressure, another target pressure higher than that is set repeatedly to increase the pressure from the auxiliary pressurizing pump starting pressure to the auxiliary pressurizing pump stopping pressure.

The auxiliary pressurization pump device according to a seventeenth aspect of the present invention is the auxiliary pressurization pump device according to any one of the second to sixteenth aspects, wherein the discharge amount of the pump is determined by the signal generated by the flowing water detection device. Alternatively, after the water flow rate is adjusted so that the alarm is maintained in the OFF state, the water flow adjustment means is adjusted, so that the discharge amount of the pump can be increased more than the water flow rate.

An auxiliary pressurizing pump device according to an eighteenth aspect of the present invention is the auxiliary pressurizing pump device according to any one of the second to seventeenth aspects, wherein the discharge amount of the pump is determined by the signal generated by the flowing water detecting device. Alternatively, there is an automatic operation mode in which the pump is operated so that the amount of water is maintained while the alarm is kept off, and a manual operation mode in which the operator can increase the discharge amount of the pump above the water amount.

The auxiliary pressurization pump device according to a nineteenth aspect of the present invention is the auxiliary pressurization pump device according to any one of the first to eighteenth aspects, further comprising a pressure detection device that detects the pressure inside the fire pipe. , the water flow adjustment means is a pressure loss element provided on the discharge side of the pump, and the pressure loss element is detachably provided on the primary side of the pressure detection device.

The auxiliary pressurization pump device according to a twentieth aspect of the present invention is the auxiliary pressurization pump device according to any one of the first to nineteenth aspects, further comprising a pressure detection device that detects the pressure in the fire pipe. , the water flow regulating means is a valve provided on the discharge side of the pump, and the valve is provided on the primary side of the pressure detection device.

The auxiliary pressurization pump device according to a twenty-first aspect of the present invention is the auxiliary pressurization pump device according to the twentieth aspect, in which the opening degree of the valve is adjusted by the control section.

The control panel according to the 22nd aspect of the present invention is for maintaining pressure in a fire extinguishing pipe equipped with a flowing water detection device that detects a predetermined flowing water phenomenon caused by a fire extinguishing pump and turns a signal or alarm from an OFF state to an ON state. , a control panel used in an auxiliary pressurizing pump device equipped with a pump that pumps fluid into the fire pipe, the control panel changing the rotational speed of the electric motor by controlling an inverter that is a variable speed means of the electric motor that drives the pump. Accordingly, a control unit is provided that adjusts the discharge amount of the pump to a water amount at which the signal or alarm issued by the flowing water detection device is maintained in an OFF state.

According to this configuration, the control unit can reduce the rotational speed of the electric motor from the normal operating rotational speed to a rotational speed that is equal to or lower than the inoperable water amount of the flowing water detection device provided in the fire pipe, so that the auxiliary pressurizing pump It is possible to suppress unintended operation of the running water detection device due to activation of the system, and prevent false alarms from being issued. Further, since the discharge amount of the pump can be adjusted by the water flow adjustment means, the discharge amount of the auxiliary pressure pump can be increased or decreased.

Further, the piping equipment can be simplified compared to providing a constant water flow valve or the like in the fire extinguishing equipment on the secondary side of the auxiliary pressurizing pump device. Furthermore, by lowering the rotational speed of the auxiliary pressurizing pump, power consumption can be reduced, so pressurizing operation can be achieved with energy savings. By operating the electric motor at a rotation speed that is below the inoperative water flow rate of the water flow detection device in the fire extinguishing equipment, noise and vibration can be reduced compared to conventional products.

According to the present invention, it is possible to suppress unintended operation of the flowing water detection device due to activation of the auxiliary pressure pump, and prevent false alarms from being issued. Furthermore, compared to installing a constant water flow valve or the like in the fire extinguishing equipment on the secondary side of the auxiliary pressurizing pump device to restrict the flow rate, piping equipment and piping work can be simplified.

Further, according to one aspect of the present invention, power consumption is reduced by using an inverter to reduce the rotational speed of the electric motor from a normal operating rotational speed to a rotational speed that is equal to or lower than the inoperable water amount of a flowing water detection device provided in the fire pipe. can be reduced, so energy-saving pressurized operation can be realized. By operating the electric motor at a rotation speed suitable for the amount of inactive water, which varies depending on the specifications of the flowing water detection device of the fire extinguishing equipment, it has the effect of reducing noise and vibration and shortening operating time compared to conventional products.

FIG. 1 is a schematic configuration diagram of a fire pump system according to a first embodiment. FIG. 2 is a schematic diagram for explaining a fire pump starting pressure, an auxiliary pressurizing pump starting pressure, and a stopping pressure. It is an example of the graph which shows the relationship between the total lift and discharge amount of an auxiliary pressurization pump apparatus. This is an example of a data table stored in the auxiliary pressurizing pump device. FIG. 2 is a schematic diagram showing an example of a temporal change in the pressure on the discharge side of the auxiliary pressurizing pump in the cases of Examples 1 and 2. FIG. FIG. 7 is a schematic diagram showing an example of a time change in the target pressure of the auxiliary pressurizing pump in the case of Example 3. It is a flow chart which shows automatic operation of an auxiliary pressure pump device. It is a state return diagram of automatic operation mode and manual operation mode of an auxiliary pressurization pump device. It is a flowchart of manual operation. FIG. 2 is a schematic configuration diagram of a fire pump system according to a second embodiment. FIG. 2 is a schematic configuration diagram of a fire pump system according to a third embodiment.

Each embodiment will be described below with reference to the drawings. However, more detailed explanation than necessary may be omitted. For example, detailed explanations of well-known matters or redundant explanations of substantially the same configurations may be omitted. This is to avoid unnecessary redundancy in the following description and to facilitate understanding by those skilled in the art.

Each embodiment includes a flow rate adjustment means that can increase or decrease the discharge amount of the pump. For example, in order to suppress unintended operation of the water flow detection device due to activation of the auxiliary pressure pump, in each embodiment, the auxiliary pressure pump device uses a water flow adjustment means to adjust the discharge amount of the pump by a signal generated by the water flow detection device. Alternatively, the amount of water can be limited to the amount that can be maintained while the alarm is off, or even after the amount of water is limited, the discharge amount of the pump can be increased as necessary to obtain as much water as possible. In addition, since the operating conditions vary depending on the type of flowing water detection device, if the discharge amount of the auxiliary pressurizing pump device is too small, it may take a long time to pressurize to the specified stop pressure, or the frequency of on/off operation may be reduced. There are also problems such as an increase in Therefore, the auxiliary pressure pump device of each embodiment described below is equipped with a water flow adjustment means that can adjust the discharge amount to an appropriate water amount depending on the water flow detection device used, the timing, etc.

FIG. 1 is a schematic configuration diagram of a fire pump system according to a first embodiment. As shown in FIG. 1, the fire pump system is a type of fire extinguishing equipment, and includes a fire pump device 10, sprinklers 62, 63, which are a type of water sprayer, and piping from a fire pump 14 to the sprinklers 62, 63. It includes a fire extinguishing pipe 53, a flowing water detection device 61 for automatically detecting the phenomenon of flowing water in the fire extinguishing pipe 53 and issuing a signal or alarm, and an auxiliary pressurizing pump device 1.

The fire pump device 10 includes a pressure tank (also referred to as a pressure air tank) 12 which is a pressure holder for maintaining the pressure of a fire pipe 53, a fire pump 14 for conveying fire extinguishing water in the event of a fire, and a fire pump 14. It includes a check valve 20 that prevents backflow of water, a gate valve 25, and a pressure switch 46 that can detect the pressure at which the fire pump 14 starts. A fire pipe 53 for supplying water to the plurality of sprinklers 62 and 63 is connected to a discharge port of the fire pump device 10 on the secondary side of the gate valve 25 . Further, the fire pipe 53 is equipped with a running water detection device 61.

The sprinklers 62 and 63 are devices that are installed in a fire pipe 53 that is piped to the discharge side of a fire pump, and in the event of a fire, a sprinkler head (not shown) is released and sprays water onto a target to extinguish the fire. When the sprinkler head is released, the fire pump 14 is activated. The activated fire pump 14 continues to operate until at least a predetermined operating time has elapsed.

The flowing water detection device 61 is, for example, a wet flowing water detection device, and is designed not to issue a signal or alarm even if water starts flowing at an inactive water amount (first water amount) at a predetermined minimum working pressure. The inoperable water amount is the amount of water determined as the maximum amount of water flowing inside the main body that does not issue a signal or alarm. If it continues to pass for more than the delay time, it will activate and issue a signal or alarm. The amount of water inactive and the delay time of the flowing water detection device 61 are determined by the product specifications of the flowing water detection device 61. In this specification, a state in which the running water detection device 61 does not issue a signal or an alarm is referred to as an OFF state, and a state in which the running water detection device 61 issues a signal or alarm is referred to as an ON state. In other words, the flowing water detection device 61 has a first amount of water determined as the maximum amount of water flowing in the main body at which the signal or alarm is maintained in the OFF state, and the amount of water, etc. that is larger than the first water amount is inside the main body. When a predetermined flowing water phenomenon, such as continuing to pass for more than a predetermined delay time, is detected, the signal or alarm changes from the off state to the on state.

The auxiliary pressurizing pump device 1 that pumps fluid into the fire extinguishing pipe 53 in order to maintain the pressure of the fire extinguishing pipe 53 includes a pump (also referred to as an auxiliary pressurizing pump) 34, an electric motor 33 that is a driving machine of the pump 34, and an electric motor 33. an inverter 32 which is a variable speed means, an operation panel 30 equipped with an input interface 31 through which various information is input by the operator, a priming tank 29 in which priming water for the pump 34 and a conveying liquid are stored, and water discharged by the pump 34 from the pump 34. 34, a gate valve 49 that can shut off the auxiliary pressure pump device 1 and its secondary side, a control unit 42 that controls each device of the auxiliary pressure pump device 1, and a control unit 42. The control panel 43 is provided with a pressure detector 50 and a control panel 43 in which is housed and an operation panel 30 is attached to the front (on the near side). As shown in FIG. 1, in the auxiliary pressure pump device 1 of this embodiment, a pump 34, an electric motor 33, an inverter 32, a check valve 48, a gate valve 49, and a pressure detector 50 are located below the priming tank 29. It can be installed compactly. Note that the inverter 32 may be installed within the control panel 43. The fire extinguishing pump device 10 and the auxiliary pressure pump device 1 are arranged on the same base 11, for example.

In this embodiment, a pressure detector 50 that detects the pressure on the discharge side of the pump 34 includes a pressure sensor 51 and/or a pressure switch 52. The pressure detector 50 is provided in a branch pipe 38 branched from the pipe 37 communicating with the discharge port of the pump 34, detects the pressure inside the pipe 37, and outputs a signal indicating the detected pressure to the control unit 42. do. This branch pipe 38 is located in a flow path between the check valve 48 and the gate valve 49.

The pressure sensor 51 converts the pressure measured by the pressure sensing element into an analog signal and outputs it to the control section 42 . The pressure switch 52 outputs an on signal to the control unit 42 when the pressure on the discharge side of the pump 34 exceeds a predetermined pressure, and outputs an off signal to the control unit 42 when the pressure falls below a predetermined pressure. Note that the pressure detector 50 may include only the pressure sensor 51 or only the pressure switch 52. Further, a plurality of pressure switches 52 may be provided to detect the stop pressure and start pressure of the pump 34, respectively.

The control unit 42 can employ a circuit board centered on a CPU (Central Processing Unit), a circuit configured with a relay sequence, or the like. As shown in FIG. 1, the control section 42 includes a memory 44, a calculation section (not shown), and an I/O section (not shown). The calculation unit of the control unit 42 sets, clocks, and calculates various data for operating the pump 34 based on programs and various data stored in the memory 44 and signals input from the I/O unit. etc.

As the memory 44, nonvolatile memories such as ROM, HDD, EEPROM, FeRAM, and flash memory, and volatile memories such as RAM are used. The memory 44 contains control programs, various data, such as data of calculation results in the calculation unit (operating time, integrated value, etc.), pressure values (discharge pressure), and used in automatic operation control (automatic operation of the pump 34). Data (stopping pressure, starting pressure (starting pressure)), data input through the input interface 31, data input through the I/O section, data output through the I/O section, etc. are stored.

The I/O section is used for ports, communication, etc. The I/O section has a circuit that acquires signals from the inverter 32 and the pressure detector 50, and sends the acquired signal information to the calculation section. Further, the I/O section and the inverter 32 are connected to each other through a serial communication connection line (not shown) such as RS422, RS232C, RS485, etc. Control signals such as various setting values, a frequency command value as a control command regarding the rotational speed of the motor 33, and start/stop signals (run/stop signals) are sent from the I/O section to the inverter 32, and the inverter 32 sends control signals such as Operating conditions (operating status) such as actual frequency values and current values are sequentially sent to the section. Note that the control signal transmitted and received between the I/O section and the inverter 32 can be an analog signal and/or a digital signal. For example, an analog signal can be used for the rotation frequency, etc., and a digital signal can be used for the operation stop command, etc. Further, the I/O section and the input interface 31 are connected to each other through a serial communication connection line (not shown) such as RS422, RS232C, RS485, etc. Various setting values, various command values, etc. are sent from the input interface 31 to the I/O section, and operating conditions (operating status, etc.) such as frequency values and current values received from the inverter 32 are sent from the I/O section to the input interface 31. ) and discharge pressure are sent sequentially. Note that an analog signal and/or a digital signal can be used as the control signal transmitted and received through communication with the I/O section.

The operation panel 30 can employ a circuit board constituting a microprocessor centered on a CPU (Central Processing Unit), a dedicated relay sequence circuit, or the like. The operation panel 30 includes a storage section (not shown), a calculation section (not shown), an I/O section (not shown), a display section (not shown), and an input interface 31. As the calculation unit of the operation panel 30, for example, a CPU is used. The calculation unit executes processing for displaying the status of the auxiliary pressurizing pump device 1 and operating it, based on the program and various data stored in the storage unit. The input interface 31 includes, for example, a touch panel, input buttons, switches, etc., and receives input from an operator, and the input is sent to the control unit 42 via the calculation unit and I/O unit of the operation panel 30. Further, the input interface 31 may be connected to an external device (for example, a general-purpose information terminal such as a personal computer or a dedicated terminal) via a network or communication, and may receive input from the external device.

FIG. 2 is a schematic diagram for explaining the fire pump starting pressure, the auxiliary pressure pump starting pressure, and the stopping pressure. In FIG. 2, the horizontal axis shows the discharge amount, and the vertical axis shows the total head. As shown by straight lines L1 and L2 in FIG. 2, the auxiliary pressurizing pump stop pressure H2 is set to a pressure lower than the cut-off total head H1 of the fire pump 14. Specifically, the auxiliary pressurization pump stop pressure H2, which is the stop pressure of the pump 34 of the auxiliary pressurization pump device 1, is determined by considering the purpose of stopping the pump 34 when starting the fire pump 14 and the pressure resistance of the piping 53, etc. It is set lower than the cut-off total head H1 of the fire pump 14 by a predetermined pressure difference. Further, as shown by straight lines L3 and L4 in FIG. 2, the auxiliary pressurizing pump starting pressure H3 is set to a higher pressure than the fire pump starting pressure H4. Specifically, the auxiliary pressurizing pump starting pressure H3, which is the starting pressure of the pump 34 of the auxiliary pressurizing pump device 1, is set higher than the starting pressure H4 of the fire pump 14 by a predetermined pressure difference. As a result, when the pressure in the fire pipe 53 decreases, the pump 34 can be started before the fire pump 14 is started, and furthermore, the pump 34 can be operated within the pressure range of the pipe 53, etc. Once the pressure within 53 has increased, pump 34 can be stopped.

Further, the curve W11 is a head curve showing the relationship between the discharge amount and the total head of the fire pump device 10, and the curve W12 is a head curve showing the relationship between the discharge amount and the total head of the auxiliary pressure pump device 1, and the curve W12 is a head curve showing the relationship between the discharge amount and the total head of the auxiliary pressurizing pump device 1. When compared in terms of values, the discharge amount of the auxiliary pressurizing pump device 1 is smaller than that of the fire pump device 10. By installing the auxiliary pressurizing pump device 1 including the pump 34 that can be driven by an electric motor with a smaller output than the fire pump 14, the pressure inside the fire pipe 53 can be maintained in a reasonable manner. Further, the pump 34 is, for example, a positive displacement plunger pump that can be driven by an electric motor with a smaller output than a non-positive displacement pump.

When a fire occurs and the stopcocks of the sprinklers 62 and 63 melt and are opened, water pressurized in the pressure tank 12 is first supplied to the sprinklers 62 and 63, and water is ejected from the sprinklers 62 and 63. be done. When the pressure inside the fire pipe 53 and the pressure tank 12 drops below the preset fire pump starting pressure H4 due to this jetting of water, the pressure switch 46 that detects the pressure drop operates (ON), and the fire pump (not shown) The control panel starts the fire pump 14, which pressurizes water in a fire water tank (not shown) and continuously supplies it into the fire pipe 53.

The inside of the fire pipe 53 and the pressure tank 12 are filled with water pressurized at a predetermined pressure during normal times, that is, when water is not discharged by the sprinklers 62 and 63, and the pressure is increased to maintain the predetermined pressure. Air is sealed inside the tank 12. Incidentally, due to causes other than the occurrence of a fire, the water and air in the fire extinguishing pipe 53 and the pressure tank 12 naturally escape, and the pressure inside the fire extinguishing pipe 53 gradually decreases. In automatic operation of the auxiliary pressurizing pump device 1, when the pressure in the fire pipe 53 gradually decreases and the pressure in the fire pipe 53 and the pressure tank 12 falls below the auxiliary pressurizing pump starting pressure H3, the pressure sensor 51 The control unit 42 detects a pressure lower than the auxiliary pressurizing pump starting pressure H3 from the auxiliary pressurizing pump starting pressure H3 or detects a detection signal of the auxiliary pressurizing pump starting pressure H3 or less from the pressure switch 52, and starts the pump 34 of the auxiliary pressurizing pump device 1. An operation signal is transmitted to the inverter 32, and water discharged from the discharge port by the operation of the pump 34 is sent into the fire pipe 53 communicating with the piping 37. At the same time, it is sent to the pressure tank 12 through the pressure tank piping 27 communicating with the fire pipe 53, and the pressure in the fire pipe 53 and the pressure tank 12 is restored to the auxiliary pressurizing pump stop pressure H2 without starting the fire pump 14. It is designed to let you do so.

That is, the auxiliary pressure pump device 1 automatically operates the pump 34 in the following steps (1) to (3).
(1) When the pressure in the fire pipe 53 and the pressure tank 12 decreases below the auxiliary pressurizing pump starting pressure H3, the control unit 42 determines that the starting conditions are met and starts the pump 34.
(2) The started pump 34 is operated so that the flowing water detection device 61 is maintained in the OFF state.
(3) When the pressure inside the fire pipe 53 and the pressure tank 12 rises to the auxiliary pressurization pump stop pressure H2 or higher, the control unit 42 determines that the stop condition is satisfied and stops the pump 34.

In this way, the auxiliary pressurizing pump device 1 maintains the pressure inside the fire pipe 53 at a level higher than the auxiliary pressurizing pump starting pressure H3 and lower than the cut-off total head H1 of the fire pump 14 during normal times when the sprinklers 62 and 63 are not operating. or below the auxiliary pressurizing pump stop pressure H2), the fluid is pumped into the fire pipe 53 by automatic operation of the pump 34.

FIG. 3 is an example of a graph showing the relationship between the total lift and the discharge amount of the auxiliary pressurizing pump device. The head curve W1 in FIG. 3 is an example of a head curve showing the relationship between the total head and the discharge amount of the auxiliary pressurizing pump device 1 when the rotation speed of the electric motor 33 is a predetermined rotation speed F1 (for example, the maximum rotation speed). It is. Similarly, the lift curves W1, W2, W3, W4, W5, and W6 indicate that the rotational speed of the electric motor 33 is the predetermined rotational speed F1, F2, F3, F4, F5, and F6 (F1>F2>F3>F4>F5> It is an example of the head curve which shows the relationship between the total head H of the auxiliary pressurization pump device 1, and the discharge amount Q at the time of F6). As described above, the auxiliary pressurizing pump starting pressure H3 and the auxiliary pressurizing pump stopping pressure H2 are determined by the starting pressure H4 of the fire pump 14 and the fire pump shutoff total head H1. When the pump 34 of the auxiliary pressurizing pump device is operated at the rotation speed F1 in the range from the auxiliary pressurizing pump starting pressure H3 to the auxiliary pressurizing pump stopping pressure H2 in FIG. 3, the discharge amount of the head curve is Qn2 (for example, Qn2 =20 [L/min]). Therefore, when the non-operating water amount of the flowing water detection device 61 is Qn2, if the pump 34 is operated at the rotational speed F1 of the electric motor 33, there is a risk that the flowing water detection device 61 will operate and turn on. .

Therefore, if the rotational speed of the electric motor 33 is lowered from F1 to F2 using the inverter 32 and the relationship between the total head and discharge flow rate of the auxiliary pressurizing pump device 1 is made as shown in the curve W2, the curve W2 shows that the total head is Even if the flow rate is zero, the flow rate is less than Qn2, so even if there is a large amount of water leakage due to damage to the piping on the secondary side of the auxiliary pressurizing pump device, the discharge amount on the head curve W2 is the non-operating water amount Qn2 It can be kept below.

Similarly, for example, when the non-operating water amount of the flowing water detection device 61 is Qn3, Qn4, Qn5 (Qn2>Qn3>Qn4>Qn5), the rotation speed (or frequency) of the electric motor 33 is further lowered to F3, F4, F5. If the relationship between the total head and the discharge amount of the auxiliary pressurizing pump device 1 is set as the head curves W3, W4, and W5, respectively, the discharge amount of the pump can be made below Qn3, Qn4, and Qn5 [L/min], respectively. It can be suppressed.

Note that when the non-operating water amount of the flowing water detection device 61 is Qn1, even if the pump 34 is operated at the rotation speed F5 of the head curve W5, the flowing water detection device 61 is in the off state in the same way as when it is operated at the rotation speed F1. will be maintained. However, since the sprinklers 62 and 63 are normally closed and the pump 34 of the auxiliary pressurizing pump device 1 is operated with the secondary side almost closed, the operation at the rotation speed F5 is different from the operation at the rotation speed F1. Compared to normal operation, it may take more time to reach the auxiliary pressurizing pump stop pressure H2, or there is a possibility that pressurization may not be sufficiently applied and the starting and stopping may be repeated. Therefore, it is preferable that the electric motor 33 be operated at the maximum rotational speed under the condition that the flowing water detection device 61 is maintained in the OFF state. If the rotational speed of the electric motor can be set discretely from F1 to F6, the maximum rotational speed among the rotational speeds F1 to F6 of the electric motor can be set under the condition that the running water detection device 61 is maintained in the OFF state. It is preferable to determine the first rotation speed.

In this embodiment, when the non-operating water amount of the flowing water detection device 61 is Qn1, the electric motor 33 is operated at the maximum rotational speed F1 under the condition that the flowing water detection device 61 is maintained in the OFF state. On the other hand, depending on the installation situation, when the non-operating water amount of the flowing water detection device 61 is Qn1, it may be necessary to operate the electric motor 33 at the lowest possible rotational speed in order to reduce the noise that becomes noticeable at high speeds. be. Assuming that the rotational speeds corresponding to the head curves W1 to W6 shown in FIG. It is preferable to determine the minimum rotational speed F5 as the first rotational speed under the condition that the cutoff head, which is the total head at the point of zero flow rate in the head curves W1 to W6, is higher than the auxiliary pressurizing pump stop pressure H2. If the pump 34 is operated at the rotation speed F6 corresponding to the head curve W6, the cut-off head will not reach the auxiliary pressurizing pump stop pressure H2, so this cannot be adopted. This is because when the pump 34 is operated at a pressure (corresponding to W5), the cut-off lift exceeds the auxiliary pressurization pump stop pressure H2, so this can be adopted.

FIG. 4 is an example of a data table stored in the auxiliary pressurizing pump device. As shown in FIG. 4, as an example of a data table T1 showing the relationship between the inoperable water amount of the flowing water detection device and the discharge amount of the auxiliary pressurizing pump device in the case of the inactive water amount, the memory 44 stores the data table T1 in the fire pump system. The model (type) of the flowing water detection device that can be used in At least one set with the maximum rotational speed (rotation speed) below is stored. Further, as shown in FIG. 4, a delay time, which is one of the conditions for turning on the signal or alarm issued by the running water detection device, may also be stored. Furthermore, if there are other applicable conditions, they may be added to the data table T1.

In addition, in the above, it was assumed that the maximum rotation speed of the electric motor 33 under the condition that the total head is 0 and the inoperable water amount or less is stored, but it is not necessarily the maximum rotation speed under the condition. The rotational speed is not limited to this, as long as the discharge amount of the pump 34 is equal to or less than the inactive water amount.

Alternatively, in order to prevent the flowing water detection device 61 from turning on by controlling the time during which the auxiliary pressurizing pump starting pressure H3 or lower is less than the above delay time, when the total head is 0, the inoperable water amount The conditions of the rotational speed may be relaxed, such as not only the rotational speed below, but also the rotational speed such that the total pump head is the inactive water amount or less when the auxiliary pressurizing pump starting pressure H3. In that case, the memory 44 contains the type of water flow detection device (for example, model), the amount of inactive water for the type, the delay time, and the rotation speed when the total head is at the auxiliary pressurizing pump starting pressure H3. A relationship between rotational speeds that is equal to or less than the non-operating water amount may be stored.

In addition, since the discharge amount of a pump is generally proportional to the rotation speed of the pump, the memory 44 stores the rotation speed as an example of the relationship between the inoperable water amount of the flowing water detection device and the rotation speed of the auxiliary pressure pump device 1. A relational expression between the flow rate and the inoperable water amount of the flowing water detection device may be stored. The memory 44 also stores the inoperable water volume of the flowing water detection device acquired through experiments or the like for each model of the auxiliary pressure pump device 1, and the amount of water in the auxiliary pressure pump device 1 in which the discharge amount of the pump 34 is equal to or less than the first water amount. The relationship between rotational speeds may be stored.

Next, the increase/decrease control of the discharge flow rate of the pump 34 executed by the control unit 42 will be explained using FIG. 3 or FIG. 4.

In this embodiment, the control unit 42 controls the rotational speed of the electric motor 33 at which the pump 34 becomes equal to or less than the first water flow so that the signal or alarm issued by the flowing water detection device 61 remains off while the pump 34 is in operation. This is stored as a first rotational speed, and while the pump 34 is in operation, the control unit 42 transmits a command frequency to the inverter 32 so that the electric motor 33 has a rotational speed equal to or lower than the first rotational speed.

Alternatively, in one embodiment, the control unit 42 controls the rotational speed of the electric motor 33 to be set to the first level of the running water detecting device 61 so that the signal or alarm issued by the running water detecting device 61 is maintained in an off state while the pump 34 is operating. A command frequency is transmitted to the inverter 32 so as not to operate continuously for longer than the delay time at a first rotational speed corresponding to the amount of water or higher. That is, the control unit 42 counts the time during which the pump 34 is operated at a first rotational speed or higher, and when the count reaches or exceeds the corresponding delay time, the control unit 42 changes the rotational speed of the electric motor 33 to a predetermined rotational speed lower than the first rotational speed. A command frequency is transmitted to the inverter 32 in order to lower the frequency to . Thereby, the operating time of the pump 34 can be shortened compared to operating at a rotational speed lower than the first rotational speed.

In this embodiment, as an example, the input interface 31 receives setting inputs for the amount of inactive water of the flowing water detection device 61 and the delay time. The control unit 42 then adjusts the above-mentioned first rotational speed so that the water flow rate on the discharge side of the pump 34 is equal to or higher than the inoperable water volume of the flow detection device 61 and the flow detection device 61 does not turn on after the delay time has elapsed. Based on this, the rotation speed of the electric motor 33 is controlled.

With this configuration, even if the amount of inactive water varies depending on the type of flowing water detecting device used as the flowing water detecting device 61, the amount of inactive water and the above delay time of the flowing water detecting device 61 installed in the target fire extinguishing equipment are input. As a result, the pump 34 is adjusted to the amount of water at which the signal or alarm issued by the water flow detection device 61 remains off during operation. Furthermore, when the auxiliary pressure pump device 1 of the present embodiment is replaced with a flowing water detection device having different specifications such as the amount of inactive water and the above-mentioned delay time due to maintenance or the like, the discharge amount of the pump 34 suitable for the specifications can be adjusted. Can be adjusted. For example, when a flowing water detection device with a large amount of inactive water is replaced, the auxiliary pressurizing pump device 1 of the present embodiment determines a first rotation speed that is higher than before replacement according to the amount of inactive water, and By operating the pump 34 based on the rotational speed, the amount of water discharged can be increased and the operating time can be shortened compared to before the flowing water detection device was replaced.

An example of a specific process for determining the first rotation speed in accordance with the specifications of the running water detection device 61 will be described. The control unit 42 determines the rotational speeds of the plurality of electric motors 33, the total head and discharge amount of the pump 32, and the head curves (for example, W1 to W5) that are the interrelationships thereof, or the plurality of head curves (W1 to W5) shown in FIG. For example, a memory 44 is provided in which calculation formulas for calculating W1 to W5) are stored. The control unit 42 preferably refers to the memory 44 and determines the rotation speed corresponding to the amount of inactive water of the flowing water detection device 61. Further, in this embodiment, as an example, the discharge amounts Qn1 to Qn5 (see FIG. 3) at points P01 to P05 (see FIG. 3) at zero total head below the auxiliary pressurizing pump starting pressure H3 may be set to the second water amount. . In this case, the control unit 42 selects the maximum rotation speed among the plurality of rotation speeds (F1 to F5) stored in the memory 44 under the condition that the second water amount, which is the discharge amount at zero total head, is equal to or less than the non-operating water amount. is determined to be the first rotation speed. Specifically, for example, when the non-operating water amount (first water amount) is greater than the water amount Qn4 and smaller than the water amount Qn3, the second Since the maximum rotational speed under the condition that the water amount is equal to or less than the non-operating water amount is the rotational speed F4 corresponding to the water amount Qn4, the control unit 42 may determine the rotational speed F4 to be the first rotational speed.

Alternatively, in one embodiment, since the pump 34 is operated with the secondary side substantially closed, the discharge amounts Q1 to Q5 at points Ps1 to Ps5 (see FIG. 3) at the auxiliary pressurizing pump starting pressure H3 are Can be set to the amount of water. In this case, the memory 44 may store lift curves W1 to W5 and corresponding motor rotational speeds F1 to F5 in association with each other. Then, the control unit 42 controls the rotational speed (F1 to F5) among the plurality of rotational speeds (F1 to F5) stored in the memory 44 to be the maximum under the condition that the second water volume, which is the discharge volume at the auxiliary pressurizing pump starting pressure H3, is equal to or less than the non-operating water volume. The rotational speed of is determined as the first rotational speed. Specifically, for example, when the non-operating water amount (first water amount) is the water amount Qn4, with reference to FIG. Under the condition that the discharge amount in H3 is equal to or less than the water amount Qn4, the maximum rotational speed is the rotational speed F4 corresponding to the lift curve W4 in FIG. 3, so the control unit 42 determines the rotational speed F4 to be the first rotational speed. It's okay.

To summarize the above, the discharge amount at a predetermined total head below the auxiliary pressurizing pump starting pressure H3 is set as the second water amount, and the control unit 42 operates under the condition that the second water amount is below the non-operating water amount (first water amount). , the maximum selectable rotational speed (for example, the maximum rotational speed at which the second water amount is equal to or less than the non-operating water amount among the head curves W1 to W5 stored in the memory 44) is determined as the first rotational speed. Note that as the head curves (for example, W1 to W5) stored in the memory 44, representative performance based on experimental results for each model of the auxiliary pressurizing pump device may be inputted via the input interface 31 or the like.

Another example of a specific process for determining the rotational speed of the electric motor 33 in accordance with the specifications of the running water detection device 61 will be described. As shown in FIG. 4, in the present embodiment, as an example, the memory 44 includes a model (type) indicating the type of flowing water detection device that can be used as the flowing water detection device 61, an inactive water amount Qn (inactive water amount), The delay time T (delay time) is one of the conditions for the signal or alarm issued by the flowing water detection device to turn on, and the discharge amount is less than or equal to the first water amount at the point where the total head of the auxiliary pressurizing pump device is zero. The relationship between the rotational speed R1 (rotational speed) of the electric motor 33 is stored as a data table T1. The data table T1 stores information on a plurality of running water detection devices that can be used as the running water detection device 61, and the stored information on the running water detection devices is added, changed, or deleted via the input interface 31. In addition, the input interface 31 receives the amount or type of inactive water of the flowing water detection device 61 provided in the fire pipe 53, and the control unit 42 refers to the data table T1 in the memory 44 to determine the amount of water received by the input interface 31. The rotational speed corresponding to the amount or type of non-operating water in the flowing water detection device 61 is determined as the first rotational speed of the pump 34. In this embodiment, the control unit 42 refers to the memory 44 and selects a rotation speed corresponding to the type of the flowing water detection device 61 provided in the fire pipe 53 from among the plurality of rotation speeds stored in the data table T1. is acquired, and the acquired rotational speed is determined as the first rotational speed. In one embodiment, the control unit 42 refers to the memory 44 and selects the first water amount of the flowing water detection device 61 provided in the fire pipe 53 from among the plurality of rotational speeds R1 stored in the data table T1. A corresponding rotational speed may be acquired and the acquired rotational speed may be determined as the first rotational speed.

With this configuration, the auxiliary pressure pump device 1 of this embodiment controls the amount of water discharged by the auxiliary pressure pump device by changing the rotation speed of the electric motor 33 to a rotation speed equal to or lower than the first rotation speed. Furthermore, in the auxiliary pressurizing pump device 1 of one embodiment, the control unit 42 has a first time T that is less than the delay time, and measures the time during which the rotational speed of the electric motor 33 is continuously equal to or higher than the first rotational speed. When the measured time reaches the first time T or more, the rotational speed of the electric motor 33 is changed to the first rotational speed or less to control the amount of water discharged by the auxiliary pressure pump device 1.

Note that, instead of the data table T1 described above, the memory 44 stores the type of at least one flowing water detection device that can be used as the flowing water detection device 61, and the discharge point at which the total head of the auxiliary pressurizing pump device is zero. The relationship between the rotational speed R1 (for example, the first rotational speed) of the electric motor 33 where the amount is less than or equal to the first water amount, or the discharge amount is the first water amount at the point where the first water amount and the total head of the auxiliary pressurizing pump device are zero. The motor may include a data table in which the following relationship between the rotational speeds of the electric motor is stored. In this case, the input interface 31 may accept the type of running water detection device 61, and the control unit 42 refers to the data table in the memory 44 to determine the type of running water detection device 61 that corresponds to the type of running water detection device 61 accepted by the input interface 31. The rotational speed may be read out, and a rotational speed less than or equal to the readout rotational speed may be determined as the rotational speed of the electric motor 33. Alternatively, the input interface 31 may receive the first water amount of the flowing water detection device 61, and the control unit 42 refers to the data table in the memory 44 to determine the first water amount of the flowing water detection device 61 that the input interface 31 has received. The rotational speed corresponding to the rotational speed may be read out, and a rotational speed less than or equal to the readout rotational speed may be determined as the rotational speed of the electric motor 33.

With this configuration, the control unit 42 can adjust the amount of water discharged by the auxiliary pressurizing pump device 1 while the pump 34 is in operation to the amount of water that maintains the signal or alarm issued by the water flow detection device 61 in the OFF state. Further, since the information of the running water detection device stored in the data table can be added, changed, or deleted via the input interface 31, various running water detection devices can be employed.

Alternatively, the memory 44 stores the relationship between the type of at least one flowing water detection device that can be used as the flowing water detection device 61 and the inoperative water amount of the flowing water detection device, and the inoperable water amount of the flowing water detection device and the auxiliary addition. The relationship with the rotational speed R1 (for example, the first rotational speed) of the electric motor 33 at which the discharge amount is equal to or less than the non-operating water amount at the point where the total head of the pressure pump device is zero may be stored as a data table. In this case, the input interface 31 receives the type of running water detection device 61, and the control unit 42 refers to the data table in the memory 44 to determine the running water detection type corresponding to the type of running water detection device 61 accepted by the input interface 31. The amount of inactive water in the device may be read out, and the rotational speed corresponding to the readout amount of inactive water may be read out with reference to the memory 44, and the readout rotational speed may be determined as the rotational speed of the electric motor 33. In this way, the control unit 42 refers to the data table in the memory 44 and sets the rotation speed of the electric motor 33 to a rotation speed suitable for the specifications of the running water detection device that corresponds to the type of running water detection device accepted by the input interface 31. The rotation speed may be determined to be 1 rotation speed.

With this configuration, the control unit 42 determines the rotation speed at which the amount of water discharged by the auxiliary pressurizing pump device 1 is equal to or less than the inoperable water amount of the flowing water detection device 61, and the rotation speed of the electric motor 33 is determined based on the rotation speed. By being controlled, the signal or alarm of the flowing water detection device 61 is maintained in an off state. Further, since the information of the running water detection device stored in the data table can be added, changed, or deleted via the input interface 31, various running water detection devices can be employed.

<How to operate the auxiliary pressure pump (fixed speed) in the comparative example>
In order to facilitate understanding of the operating method of the auxiliary pressurizing pump according to the present embodiment, first, the operating method of the auxiliary pressurizing pump (fixed speed) of a comparative example will be explained.

The comparative example does not have a variable speed means for the driving machine of the auxiliary pressurizing pump, and when the discharge pressure becomes less than the predetermined starting pressure, the pump is fixed at a predetermined level regardless of the amount of water in the inoperative state of the water flow detection device 61. The pump is started at high speed, and when the discharge pressure reaches a predetermined stop pressure or higher, the pump is stopped. When the pump is started or immediately after it is started, the pressure in the discharge piping is the lowest and the piping resistance is the lowest, so the flow rate is the highest. At this time, there is a high possibility that the flowing water detection device 61 operates unintentionally and changes from the off state to the on state (also referred to as malfunctioning). Therefore, in the fire extinguishing system using the auxiliary pressurizing pump device of the comparative example, if the flowing water detection device 61 malfunctions, a constant water flow valve is installed in the fire extinguishing equipment on the secondary side of the auxiliary pressurizing pump device, and the The water flowing to the detection device 61 is adjusted to be less than the inoperable water amount. Here, even in the fire extinguishing system using the auxiliary pressure pump device of the comparative example, auxiliary pressure is applied by supplying water to the fire extinguishing pipe 53 or pressure tank 12 from which water has drained during installation or maintenance, and pressurizing it to a predetermined pressure. This may be done with a pressure pump device. When filling the fire pipe or pressure tank with water using the auxiliary pressurizing pump after the water flowing to the flowing water detecting device 61 is adjusted to be less than the inoperable water amount by the constant water flow valve, there is no problem with malfunction of the flowing water detecting device 61. However, it may be carried out over a long period of time with the amount of water adjusted below the non-operating water amount. This is because with the fixed speed auxiliary pressurizing pump of the comparative example, it is difficult to perform work such as piping and readjustment of the constant water flow valve for increasing or decreasing the water flow.

<How to operate the auxiliary pressure pump (variable speed) according to this embodiment>
Next, an example of an operating method in automatic operation of the auxiliary pressure pump (variable speed) according to the present embodiment will be described. In this embodiment, since an inverter is provided as a variable speed means for the electric motor 33, the control unit 42 can change the rotational speed of the electric motor 33 while the pump 34 is in operation. In automatic operation of the pump 34, when the control unit 42 determines that the starting condition is satisfied (the pressure on the discharge side of the pump 34 has become equal to or lower than the auxiliary pressurizing pump starting pressure H3), the control unit 42 controls the rotation speed of the electric motor 33. The operation may be performed by fixing the rotation speed to a predetermined rotation speed that is lower than or equal to the first rotation speed, or as shown below, the rotation speed of the electric motor 33 may be set to a rotation speed that is lower than or equal to the first rotation speed at which the flow rate of the flowing water detection device 61 is lower than or equal to the first water amount. After starting at a predetermined rotation speed, the inverter 32 may be controlled to gradually increase the rotation speed. Then, when the control unit 42 determines that the stop condition is satisfied (the pressure on the discharge side of the pump 34 becomes equal to or higher than the auxiliary pressurization pump auxiliary pressurization pump stop pressure H2), the control unit 42 activates the inverter 32 to stop the pump 34. control.

When starting the pump 34, which is likely to cause the flowing water detection device 61 to malfunction, the rotation speed of the motor 33 is limited to suppress the discharge amount, and then the rotation speed is gradually increased to increase the discharge amount, thereby increasing the first rotation speed. Compared to the case of operating only at the following predetermined rotational speed, the time required for the pressure on the discharge side of the pump 34 (or the pressure in the fire pipe 53) to reach the auxiliary pressurization pump stop pressure H2 can be shortened. . In other words, the operation time of the pump 34 can be shortened, and the time of noise and vibration accompanying the operation of the pump 34 can be shortened. Therefore, it is possible to avoid unintentional operation of the flowing water detection device 61 and reduce the time of noise and vibration caused by the operation of the pump 34. Furthermore, unlike a water supply device or the like that starts due to a pressure drop caused by opening the secondary side faucet to the atmosphere, the pump 34 is operated with the secondary side substantially closed. Therefore, even if the rotational speed of the motor 33 is limited to suppress the discharge amount at the time of startup, the secondary side equipment will not be affected.

Next, four specific examples of gradually increasing the rotational speed will be described below. FIG. 5 is a schematic diagram showing an example of a temporal change in the pressure on the discharge side of the auxiliary pressure pump in Examples 1 and 2. In FIG. 5, the vertical axis represents pressure and the horizontal axis represents elapsed time. The curve W21 in FIG. 5 is an example of the time change in the pressure on the discharge side of the pump 34 at a fixed speed in the comparative example, and the curve W22 in FIG. 5 is the pressure on the discharge side of the pump 34 in Example 1 or Example 2. This is an example of the change over time.

<Example 1: Variable speed control 1 using inverter>
Controlling the inverter to gradually increase the rotational speed means counting the operating time of the pump 34 after starting, and shortening the acceleration time of the inverter 32 in proportion to the counting of the operating time. Specifically, the inverter 32 has acceleration time as a parameter. The acceleration time is set as the time for accelerating the frequency from zero to a predetermined maximum frequency, and when the inverter 32 increases the frequency, it accelerates according to the slope of the acceleration time. For example, the control unit 42 sets the acceleration time of the inverter 32 to a reference time (for example, the longest time) at startup, and gradually shortens the acceleration time as the operating time becomes longer. With this method, as the operating time becomes longer, the followability of the output frequency of the inverter 32 to the command frequency of the control unit 42 improves. The pressure on the discharge side of the pump 34 only needs to be detected at the starting pressure and the stop pressure, and the pressure on the discharge side of the pump 34 may be detected by the pressure sensor 51 or the pressure switch 52. good. As shown in the curve W22 of FIG. 5, compared to the case where the speed is fixed and/or the acceleration time is constant (curve W21), the auxiliary pressure is increased by gradually shortening the acceleration time as the operation time becomes longer. The time required to reach the pump stop pressure H2 can be shortened.

<Example 2: Variable speed control 2 using inverter>
Controlling the inverter 32 to gradually increase the rotational speed means making the acceleration time of the inverter 32 the longest at startup, and shortening the acceleration time in proportion to the deviation between the target pressure and the pressure at that point.

Specifically, for example, the control unit 42 executes pressure constant control in which the target pressure of the pressure on the discharge side of the pump 34 is set as the auxiliary pressurization pump stop pressure. The control unit 42 determines a command frequency to the inverter 32 by PI calculation in order to set the pressure on the discharge side of the pump 34 to the target pressure, and the inverter 32 controls the rotation speed of the motor 33 based on the command frequency. Then, at startup, the acceleration time of the inverter 32 is set to be the longest, and as the pressure deviation between the target pressure and the pressure at that point becomes smaller, the acceleration time is gradually shortened and changed. In this method, a pressure sensor 51 is required to detect the pressure on the discharge side. As shown by curve W22 in FIG. 5, the pressure deviation becomes smaller as the operating time becomes longer, so by gradually shortening the acceleration time according to the pressure deviation, until the auxiliary pressurization pump stop pressure is reached. time can be reduced. Note that the target pressure may be variable.

<Example 3: Variable speed control 3 using inverter>
Controlling the inverter 32 to gradually increase the rotation speed means gradually increasing the target pressure on the discharge side of the pump 34 from the auxiliary pressurizing pump starting pressure to the auxiliary pressurizing pump stopping pressure over a predetermined period of time. , the rotation speed of the electric motor 33 is controlled so that the pressure on the discharge side of the pump 34 becomes the target pressure. At this time, the acceleration time may be changed as in Examples 1 and 2 above.

Specifically, for example, the control unit 42 gradually increases the target pressure of the discharge side pressure of the pump 34 from the auxiliary pressurizing pump starting pressure H3 to the auxiliary pressurizing pump stopping pressure H2 over a predetermined period of time. At the same time, the rotational speed of the electric motor 33 is controlled by PI so that the pressure on the discharge side of the pump 34 reaches the target pressure. In this method, a pressure sensor 51 is required to detect the pressure on the discharge side.

FIG. 6 is a schematic diagram showing an example of a time change in the target pressure of the auxiliary pressurizing pump in the case of Example 3. The vertical axis in FIG. 6 is pressure and the horizontal axis is elapsed time. A straight line L5 in FIG. 6 is a straight line indicating a time change in the target pressure, and a curve W23 in FIG. 6 is an example of a time change in the pressure on the discharge side of the pump 34 in Example 3. As shown by the curve W23 in FIG. 6, by gradually increasing the target pressure on the discharge side of the pump 34 from the auxiliary pressurizing pump starting pressure H3 to the auxiliary pressurizing pump stopping pressure H2 over a predetermined period of time, The pressure on the discharge side of the pump 34 can be gradually brought closer to the auxiliary pressurizing pump starting pressure H3 to the auxiliary pressurizing pump stopping pressure H2, and when the pump 34 is started, a large amount of water temporarily flows and the flowing water detection device 61 This can prevent malfunctions.

<Example 4: Variable speed control 4 using inverter>
Controlling the inverter 32 to gradually increase the rotational speed means setting the target pressure of the discharge side pressure of the pump 34 to one target pressure and then setting another target pressure higher than that target pressure. The purpose is to control the rotational speed of the electric motor 33 so that the discharge pressure of the pump 34 reaches the target pressure while repeatedly increasing the pressure from the auxiliary pressurization pump starting pressure H3 to the auxiliary pressurization pump stop pressure H2. At this time, the acceleration time may be changed as in Examples 1 and 2 above.

Specifically, for example, the control unit 42 gradually increases the target pressure of the discharge side pressure of the pump 34 from the auxiliary pressurizing pump starting pressure to the auxiliary pressurizing pump stopping pressure (one target When the pressure is reached, another target pressure higher than that is set), and the rotational speed of the electric motor 33 is PI-controlled so that the discharge pressure of the pump 34 becomes the target pressure. In this method, a pressure sensor 51 is required to detect the pressure on the discharge side. With this configuration, the pressure on the discharge side of the pump 34 can be gradually brought closer to the auxiliary pressurizing pump starting pressure H3 to the auxiliary pressurizing pump stopping pressure H2, and a large amount of water temporarily flows when the pump 34 is started. It is possible to prevent the running water detection device 61 from malfunctioning.

As described above, the auxiliary pressurizing pump device 1 according to the present embodiment, which pumps fluid into a fire extinguishing pipe to which a fire pump supplies water, has a pump 34, an electric motor 33 that rotates the shaft of the pump 34, and a voltage supply to the electric motor 33. An inverter 32 that changes the frequency; a pressure detection device 50 that detects the pressure on the discharge side of the pump 34; and a control unit 42 that controls the inverter 32 to change the rotation speed from the normal operating rotation speed to a rotation speed that is equal to or lower than the first water amount of the flowing water detection device 61 provided in the fire pipe 53.

With this configuration, the rotational speed of the electric motor 33 can be lowered from the normal operating rotational speed to a rotational speed that is equal to or lower than the first water flow rate of the flowing water detection device 61 provided in the fire pipe, so that water flowing due to activation of the auxiliary pressurizing pump is possible. Unintended operation of the detection device 61 can be suppressed, and false alarms can be prevented.

Additionally, compared to installing a constant water flow valve in fire extinguishing equipment, piping equipment can be simplified and the work required can be reduced. Furthermore, by lowering the rotational speed of the electric motor 33, power consumption can be reduced, so pressurized operation can be achieved with energy savings. By operating the electric motor at a rotation speed that is lower than the first water flow rate of the flowing water detection device 61 of the fire extinguishing equipment, noise and vibration can be reduced compared to conventional products.

In addition, in this embodiment, the auxiliary pressurization pump device 1 executes automatic operation of the pump 34 in the following steps. FIG. 7 is a flowchart showing automatic operation of the auxiliary pressurizing pump device 1. The flowchart in FIG. 7 is executed when the pump 34 is automatically operated.

(Step S110) The control unit 42 determines whether the above-mentioned starting conditions are satisfied. When the starting conditions are satisfied (step S110: Yes), an operation command for the pump 34 is transmitted to the inverter 32. If the starting conditions are not satisfied (step S110: No), the pump 34 remains stopped and stands by in step S110.

(Step S120) The inverter 32 that received the driving command starts the electric motor 33, and the pump 34 starts.

(Step S130) The pump 34 is in operation. While the pump 34 is in operation, the control unit 42 transmits a command frequency based on the first rotational speed to the inverter 32. The inverter 32 that receives the command frequency controls the electric motor 33 at variable speed at the command frequency.

(Step S140) When the control unit 42 determines that the stop condition is satisfied (Step S140: Yes), it transmits a command to stop the pump 34 to the inverter 32. If the control unit 42 determines that the stop condition is not satisfied (step S140: No), the process returns to step S130.

(Step S150) Inverter 32 that has received the stop command stops electric motor 33, and pump 34 stops.

That is, the control unit 42 refers to the memory 44 and controls the inverter 32 so that the pump 34 is started and stopped and the motor 33 is operated at a rotation speed based on the first rotation speed.

Alternatively, in one embodiment, the inverter 32 includes an input interface 32a, and the operator inputs a predetermined command frequency corresponding to the above-described first rotation speed into the input interface 32a. The inverter 32 includes a memory (not shown) and stores the input command frequency. Then, the auxiliary pressurizing pump device 1 executes the following step S130 in place of the step S130 described above in the flowchart shown in FIG.

(Step S130) While the pump 34 is operating, the inverter 32 controls the electric motor 33 based on the command frequency input by the operator.

That is, the control unit 42 monitors the starting condition and the stopping condition, and sends only the operating command and the stopping command to the inverter 32. Then, the inverter 32 that has acquired the operation command refers to its own memory and controls the motor 33 to be operated at a rotational speed based on the first rotational speed.
<Modification 1 of the first embodiment>
The operator inputs input to the input interface 31 and/or the input interface 32a of the inverter 32, so that the control unit 42 controls the discharge amount of the pump 34 to a water amount that maintains the signal or alarm issued by the water flow detection device 61 in the off state. It would be good if it were possible to select between automatic operation, which controls the rotational speed, or manual operation at a predetermined rotational speed (for example, the maximum rotational speed). FIG. 8 is a state transition diagram of the automatic operation mode and manual operation mode of the auxiliary pressurizing pump device 1. The state transition in FIG. 8 is preferably executed when the pump 34 is stopped.

The control unit 42 operates in an automatic operation mode in which the discharge amount of the pump is set to a water amount that maintains the signal or alarm issued by the flowing water detection device in an OFF state, and in an automatic operation mode in which the discharge amount of the pump is set to a water amount that maintains the signal or alarm issued by the flowing water detection device in an OFF state. It has a manual operation mode that can increase the discharge amount. Then, as shown in FIG. 8, the control unit 42 switches between the automatic operation mode and the manual operation mode according to the operator's operation input to the input interface 31 and/or the input interface 32a of the inverter 32. Note that it is preferable that the operation input is prohibited while the pump 34 is in operation, and that the operation input is accepted only while the pump 34 is stopped. The input interface 32a of the inverter 32 includes, for example, a touch panel, input buttons, switches, etc., and receives operation input from an operator. The input information is processed by the calculation unit of the inverter 32, and at least a part of the processed information is shared with the control unit 42 through communication.

In the automatic driving mode, the control unit 42 carries out automatic driving shown in FIG. 7 . In the manual operation mode, the control unit 42 operates the electric motor 33 at a rotational speed corresponding to the operator's operation input. FIG. 9 is a flowchart showing manual operation of the auxiliary pressurizing pump device 1. The flowchart in FIG. 9 is executed when the pump 34 is operated manually.

(Step S210) The control unit 42 determines whether a driving operation is input by the operator. When a driving operation is input (step S210: Yes), a driving command for the pump 34 is transmitted to the inverter 32. If there is no operation input (step S210: No), the pump 34 remains stopped and stands by.

(Step S220) The inverter 32 that received the driving command starts the electric motor 33, and the pump 34 starts.

(Step S230) The pump 34 is in operation. While the pump 34 is in operation, the control unit 42 transmits a command frequency input by the operator via the input interface 31 to the inverter 32. Alternatively, the operator inputs the command frequency via the input interface 32a of the inverter 32. The inverter 32 that has acquired the command frequency performs variable speed control of the electric motor 33 at the command frequency.

(Step S240) When the control unit 42 determines that a stop operation has been input (Step S240: Yes), it transmits a command to stop the pump 34 to the inverter 32. If the control unit 42 determines that there is no stop operation input (step S240: No), the process returns to step S230.

(Step S250) Inverter 32, which has received the stop command, stops electric motor 33, and pump 34 stops.

In the manual operation mode, the operator can also input a command frequency at which the electric motor 33 reaches the first rotational speed or higher in step S230, regardless of the amount of non-operating water. As described above, the auxiliary pressure pump device of this embodiment has a manual operation mode, and in the manual operation mode, the operator can increase or decrease the discharge amount of the pump 34 as necessary. In other words, in the auxiliary pressurizing pump device 1 of this modification, even after the discharge amount of the pump 34 is adjusted to a water amount that maintains the signal or alarm issued by the flowing water detection device 61 in the OFF state, the input interface The discharge amount of the pump 34 can be increased or decreased by operating input to the pump 31 or/and the input interface 32a.

As an example of operation input in the manual operation mode, the operator can input an operation command (step S210) and a stop command (step S240) for the pump 34, and the control unit 42 can input the operation command and stop command (step S240) for the pump 34. The pump 34 is started (step S220)/stopped (step S250). In addition, the input interface 31 and/or the input interface 32a can input the command frequency of the inverter 32 at which the rotation speed of the electric motor 33 becomes equal to or higher than the first rotation speed in step S230, and the control unit 42 can input the command frequency input by the user. It is preferable to command the inverter 32 with the command frequency. Alternatively, the input interface 31 and/or the input interface 32a can input information about the type, amount of water, delay time, and rotation speed shown in FIG. The command frequency corresponding to the input information may be commanded to the inverter 32 in step S230.

As mentioned earlier in the comparative example, in the fire pump system, the fire pipe 53 and pressure tank 12 from which water has drained during installation or maintenance of the fire pump device 10 and the auxiliary pressurizing pump device 1 are pressurized to a predetermined pressure. It is necessary to fill the area with water. At this time, if the discharge amount of the auxiliary pressure pump device 1 is increased, the water filling time can be shortened. In the case of the auxiliary pressurizing pump (fixed speed) of the comparative example, after the discharge amount is adjusted below the non-operating water amount using a constant water flow valve, etc., in order to increase the discharge amount, work such as changing piping is required. In contrast, in the present embodiment, the control unit 42 has an automatic operation mode and a manual operation mode, and the operator can select automatic operation or manual operation by inputting to the auxiliary pressurizing pump device 1. Furthermore, in manual operation, the discharge amount can be increased or decreased as much as possible by inputting an operation, and work such as changing piping for changing the amount of water can be reduced.

In addition, the above-mentioned pump 34 is, for example, a positive displacement plunger pump that can be driven by an electric motor with a smaller output than a non-positive displacement pump. However, in the above-described embodiment, since the power consumption during startup of the pump 34 can be suppressed by soft start using the inverter 32, a non-displacement pump (for example, a small centrifugal pump) may be used as the pump 34. I can do it. Further, each of the above-mentioned functions executed by the calculation unit of the control unit 42 may be realized by the calculation unit of the inverter 32. In addition, the auxiliary pressurizing pump unit 1 uses a processor (for example, a CPU: Central Processing Unit) that also serves as a calculation unit of the control unit 42 and a calculation unit of the inverter 32 to calculate the calculation unit of the control unit 42 and the inverter 32. The parts may be composed of the same parts.

<Second embodiment>
Next, a second embodiment will be described. To solve the problem of increasing or decreasing the flow rate of the auxiliary pressurizing pump, it is possible to narrow the flow path by connecting a removable pressure loss element such as an orifice or a constant water flow valve to the piping 37 on the secondary side of the auxiliary pressurizing pump unit. It is conceivable to adjust the amount of fluid flowing.

However, if an orifice or constant water flow valve is connected to the piping 37 on the secondary side of the auxiliary pressurizing pump unit 1 to limit the amount of fluid flowing, the operator must take into consideration the pressure loss of the orifice or constant water flow valve. The stop pressure, which is the water pressure at which the auxiliary pressure pump unit stops, must be adjusted. Therefore, it was difficult to adjust the pressure detection device 50 provided in the auxiliary pressurizing pump unit 1. If this stop pressure is too low, the auxiliary pressure pump will stop without being sufficiently pressurized, resulting in frequent repeated operation and stop. On the other hand, if this stop pressure is too high, the pressure will be too high, which may have an adverse effect on equipment such as piping. Therefore, on-site work such as adding or moving the pressure detection device 50 to the orifice provided in the piping 37 on the secondary side of the auxiliary pressurizing pump unit 1 or the secondary side of the constant water flow valve occurs.

Therefore, in the second embodiment and the third embodiment described later, it is an object of the present invention to suppress the unintended operation of the flowing water detection device due to the activation of the auxiliary pressure pump while avoiding the difficulty in adjusting the pressure detection device. shall be.

FIG. 10 is a schematic configuration diagram of a fire pump system according to a second embodiment. Elements similar to those in FIG. 1 are denoted by the same reference numerals, and their explanations will be omitted. The auxiliary pressure pump device 1b in FIG. 10 is different from the auxiliary pressure pump device 1 in FIG. 1 in that the auxiliary pressure pump device 1b in FIG. The difference is that (flowing water adjustment means) is provided. The pressure loss element 71 is, for example, an orifice removably provided on the primary side of the pressure detection device 50 or a valve whose opening degree can be adjusted. Since it is sufficient that the pressure switch 52 or the pressure sensor 51 can detect the pressure after the pressure loss due to the pressure loss element 71, the pressure loss element 71 may be on the primary side of the pressure switch 52 or the pressure sensor 51, and the check valve 48 It may be the secondary side of

In this way, in the second embodiment, the pressure loss element 71 is provided on the primary side of the pressure switch 52 or the pressure sensor 51 to throttle the discharge amount so that the amount of water is equal to or less than the non-operating water amount of the flowing water detection device 61. At this time, the control unit 42 variable-speed controls the rotational speed of the electric motor 33 using the inverter 32 so that the discharge pressure of the pump 34 increases to the stop pressure. Thereby, the pressure detected by the pressure switch 52 or the pressure sensor 51 can be reliably increased to the auxiliary pressurizing pump stop pressure H2 while suppressing the discharge amount to the inactive water amount of the water flow detection device or less.

In the second embodiment, a pressure loss element 71 provided on the secondary side of the pump 34 adjusts the discharge amount to a water amount suitable for the water flow detection device. As a comparative example, a pressure loss element provided on the primary side of the pump 34 can reduce the discharge amount by cavitation. However, cavitation is also affected by the water level and temperature of the water tank on the suction side, the installation environment such as the operating conditions, and it is difficult to predict pump performance that takes cavitation into account. In comparison, when the discharge amount is throttled by the pressure drop element 71 provided on the secondary side of the pump 34, the pressure loss is equal to the square of the water volume of the discharge pressure multiplied by a coefficient determined by the pressure drop element. The performance of the pump 34, including the pressure loss of the pressure loss element 71, can be predicted based on arithmetic expressions, experimental results, and the like. In other words, the auxiliary pressurizing pump device 1b allows the pressure loss element 71 (for example, an orifice) to be attached and detached via a flange provided on the discharge pipe of the pump 34, and has a plurality of It is preferable that a head curve suitable for the specifications of the flowing water detection device 61 be selected from among the head curves, and a pressure loss element 71 having a pressure drop corresponding to the selected head curve be used. Further, the control unit 42 selects a head curve suitable for the specifications of the flowing water detection device 61 from among a plurality of head curves that include pressure losses of pressure loss elements 71 having different throttle amounts, and performs the above-mentioned head curve based on the selected head curve. Performs rotation speed control. By operating the pump 34 using the pressure loss element 71 with the minimum throttle amount that can suppress unintended operation of the water flow detection device 61 due to activation of the auxiliary pressurizing pump 34, the operating time of the pump 34 can be suppressed. I can do it.

Further, in the second embodiment, since a pressure loss element is provided on the primary side of the pressure switch 52 or pressure sensor 51, the pressure detected by the pressure switch 52 or pressure sensor 51 and the pressure inside the fire pipe 53 are the same. Therefore, it becomes unnecessary to adjust the auxiliary pressurizing pump starting pressure H3 and the auxiliary pressurizing pump stopping pressure H2, which are determined by the cut-off total head H1 and the starting pressure H4 of the fire pump 14. Therefore, in the second embodiment, unintended operation of the flowing water detection device 61 due to activation of the pump 34 is suppressed while avoiding difficulties in installation work such as adjusting the pressure switch 52 and moving or adding the pressure detector 50. be able to.

In addition, when the auxiliary pressurizing pump device 1b of this embodiment is replaced with a flowing water detecting device having different specifications such as the amount of inactive water and the above-mentioned delay time due to maintenance etc., the auxiliary pressurizing pump device 1b can be adjusted to match the specifications of the replaced flowing water detecting device. The discharge amount of the pump 34 can be adjusted by For example, when the flowing water detecting device 61 is replaced with a flowing water detecting device having a different amount of non-operating water compared to the existing one, the auxiliary pressurizing pump device 1b of this embodiment has a removable pressure drop element 71 and a non-operating water detecting device. The pressure loss element 71 can be replaced with a pressure loss element 71 having a different throttle amount than before the replacement according to the amount of working water. In other words, in the auxiliary pressure pump device 1b, after the orifice is used so that the discharge amount of the pump 34 becomes the amount of water at which the signal or alarm issued by the flowing water detection device 61 before replacement is maintained in the OFF state, the orifice is replaced, etc. By making the adjustment, the discharge amount of the pump 34 can be increased or decreased relative to the water amount. Thereby, the discharge amount of the pump 34 is increased, and the operating time can be shortened compared to operating the pump 34 at a discharge amount that matches the specifications of the flowing water detection device 61 before replacement.

Note that, as shown in FIG. 10, the pressure loss element 71 is disposed under the priming tank 29 closest to the secondary side of the pump 34. This makes the auxiliary pressure pump unit 1b compact. Furthermore, since it is removably disposed on the front side like the operation panel 30, the operator can easily adjust the flow rate (replacing the orifice and adjusting the opening degree of the valve). Furthermore, in this embodiment, since the discharge amount of the pump 34 can be increased or decreased by adjusting the amount of restriction of the pressure drop element 71, the inverter 32 may be omitted.

<Third embodiment>
FIG. 11 is a schematic configuration diagram of a fire pump system according to a third embodiment. Elements similar to those in FIG. 1 are denoted by the same reference numerals, and their explanations will be omitted. The auxiliary pressure pump device 1c in FIG. 11 is different from the auxiliary pressure pump device 1 in FIG. The difference is that there is a Note that the electric valve 72 may also be referred to as a solenoid valve. Since it is sufficient that the pressure switch 52 or the pressure sensor 51 can detect the pressure after the pressure loss due to the electric valve 72, the electric valve 72 may be on the primary side of the pressure switch 52 or the pressure sensor 51, and the check valve 48 It may be the secondary side of

That is, on the primary side of the pressure switch 52 or the pressure sensor 51, a valve (here, an electric valve 72 as an example) whose opening degree can be adjusted under the control of the control unit 42 is provided, and the control unit 42 controls the automatic operation of the pump 34. , the opening degree is fixed to be equal to or less than the above-mentioned first water amount, or the opening degree is controlled to be changed according to the operating situation or the pressure of the pressure sensor 51.

For example, the electric valve 72 is controlled by the control unit 42 to have a small opening degree when the pump 34 is stopped and when the pressure is low (that is, near the starting pressure), and to gradually open as the pump 34 operates. .

Specifically, the control unit 42 may control the following steps.

(Step 1) Fully open the electric valve 72 while the pump is stopped.

(Step 2) When the pressure on the discharge side drops below the starting pressure, the electric valve 72 is fully closed or the opening is adjusted so that the discharge amount is equal to or less than the first water amount (non-operating water amount) of the water flow detection device 61. small).

(Step 3) Start the pump 34.

(Step 4) The electric valve 72 is gradually opened from a small opening state to a fully open state.

(Step 5) The pump 34 is stopped when the pressure on the discharge side exceeds the stop pressure. At this time, the electric valve 72 is fully opened.

Note that a plurality of electrically operated valves or electromagnetic valves may be used instead of the electrically operated valve 72, and the flow rate may be adjusted in stages according to the number of electrically operated valves or electromagnetic valves that are opened.

In the third embodiment, the control unit 42 controls the opening degree of the electric valve 72 so that the discharge amount is equal to or less than the inoperative water amount of the flowing water detection device 61. As a result, the discharge amount becomes equal to or less than the non-operating water amount of the water flow detection device 61, and the control unit 42 gradually opens the electric valve 72 from a small opening state to a fully open state to open the auxiliary pressure pump 1. Since the discharge amount is increased, it is possible to suppress the operation time of the pump 34 while suppressing unintended operation of the flowing water detection device 61 due to activation of the pump 34. Further, in the third embodiment, an electric valve 72 is provided on the primary side of the pressure switch 52 or pressure sensor 51, so that the pressure detected by the pressure switch 52 or pressure sensor 51 and the pressure inside the fire pipe 53 are the same. Therefore, it is not necessary to adjust the pressure switch 52, the auxiliary pressurizing pump stop pressure H2, etc. in consideration of the pressure loss at the electric valve 72. Therefore, in the third embodiment, flowing water can be detected by starting the pump 34 while avoiding the difficulty of installation work such as adjusting the pressure switch 52 and the auxiliary pressurizing pump stop pressure H2, and moving or adding the pressure detector 50. Unintended operation of the device 61 can be suppressed.

Furthermore, when the auxiliary pressurizing pump device 1 of the present embodiment is replaced with a flowing water detection device having different specifications such as the amount of inactive water and the above-mentioned delay time due to maintenance or the like, the discharge amount of the pump 34 is adjusted according to the specifications. Can be adjusted. For example, when the flowing water detection device is replaced with a flowing water detection device that has a large amount of inactive water, the auxiliary pressurizing pump device 1 of this embodiment increases the opening degree of the electric valve 72 at the start of operation compared to before the replacement, in accordance with the amount of inactive water. However, by shortening the time until full opening, the discharge amount can be increased and the operating time can be shortened. Also, in this embodiment, similarly to the first modification of the first embodiment, there is an automatic operation mode and a manual operation mode, and the command frequency of the inverter 32 is inputted in step S230 in the manual operation mode. In place of or in addition to this, the opening degree of the electric valve 72 may be inputted.

Note that, as shown in FIG. 11, the electric valve 72 is disposed under the priming tank 29 immediately on the secondary side of the pump 34. This makes the auxiliary pressure pump unit 1 compact. Furthermore, in this embodiment, since the discharge amount of the pump 34 can be increased or decreased by changing the opening degree of the electric valve 72, the inverter 32 may be omitted.

As described above, the present invention is not limited to the above-described embodiments as they are, and in the implementation stage, the constituent elements can be modified and embodied without departing from the scope of the invention. Moreover, various inventions can be formed by appropriately combining the plurality of components disclosed in the above embodiments. For example, some components may be deleted from all the components shown in the embodiments. Furthermore, components from different embodiments may be combined as appropriate.

1, 1b, 1c Auxiliary pressure pump device 10 Fire pump device 11 Base 12 Pressure tank 14 Fire pump 20 Check valve 25 Gate valve 27 Pressure tank piping 29 Priming tank 30 Operation panel 31 Input interface 32 Inverter 33 Electric motor 34 Pump 37 Piping 38 Branch piping 46 Pressure switch 48 Check valve 49 Gate valve 50 Pressure detection device 51 Pressure sensor 52 Pressure switch 53 Fire pipe 61 Flowing water detection device 62 Sprinkler 71 Pressure loss element 72 Electric valve (valve)

Claims (18)

An auxiliary pressurizing pump that pumps fluid into the fire pipe in order to maintain the pressure inside the fire pipe, which is equipped with a water flow detection device that changes a signal or alarm from an OFF state to an ON state when the fire pump detects a specified water flow phenomenon. A device,
pump and
flowing water adjusting means for increasing or decreasing the discharge amount of the pump;
Equipped with
The flowing water adjusting means adjusts the discharge amount of the pump to a water amount such that a signal or alarm issued by the flowing water detection device is maintained in an OFF state,
comprising an electric motor that drives the pump,
The flowing water adjusting means is an inverter that is a variable speed means of the electric motor,
A control unit that controls the inverter to change the rotational speed of the electric motor, thereby adjusting the discharge amount of the pump to a water amount that maintains the signal or alarm issued by the flowing water detection device in an OFF state. ,
The flowing water detecting device is configured to allow water in an amount larger than a first water amount, which is defined as the maximum amount of water flowing in the main body, at which the signal or alarm issued by the flowing water detecting device is maintained in an OFF state, to flow through the main body for a predetermined delay time. If the water continues to pass, it is determined that the flowing water phenomenon has been detected.
The control unit includes:
maintaining a predetermined first time less than the delay time;
The rotational speed of the pump is continuously measured for a time when the rotational speed of the pump becomes equal to or higher than the first rotational speed, which is the rotational speed of the electric motor, and becomes equal to or lower than the first amount of water, and when the time is equal to or higher than the first time, the rotation of the electric motor is started. changing the speed to below the first rotational speed,
comprising an input interface that accepts the delay time of the flowing water detection device,
The control unit determines the first time according to the delay time received by the input interface. The auxiliary pressurizing pump device. The inverter changes the rotational speed of the electric motor, so that the discharge amount of the pump is adjusted to a water amount that maintains the signal or alarm issued by the flowing water detection device in an off state.
The auxiliary pressure pump device according to claim 1. comprising a memory that stores the first rotation speed;
The control unit refers to the memory and controls the inverter so that the electric motor is operated at a rotation speed corresponding to the first rotation speed.
The auxiliary pressure pump device according to claim 2. comprising an input interface that receives the first water amount of the flowing water detection device,
The auxiliary pressure pump device according to claim 3, wherein the control unit determines the first rotational speed according to the first water amount received by the input interface. The rotational speed of the electric motor is equal to or lower than the first rotational speed.
The auxiliary pressure pump device according to claim 3 or 4. Further comprising a memory storing a relationship between the first water amount and the rotational speed of the electric motor or a relationship between the head curve and the rotational speed of the electric motor,
The control unit refers to the memory and determines the first rotation speed corresponding to the first water amount of a flowing water detection device provided in the fire pipe. Auxiliary pressure pump device. A discharge amount at a predetermined total head below a predetermined auxiliary pressurizing pump starting pressure is defined as a second water amount, and the control unit determines that the second water amount is the second water amount among the rotational speeds of the plurality of electric motors stored in the memory. determining the maximum rotational speed as the first rotational speed under the condition that the amount of water is less than or equal to the first amount of water;
The auxiliary pressure pump device according to claim 6. Among the plurality of rotational speeds of the electric motor stored in the memory, the minimum rotational speed is determined as the first rotational speed under the condition that the cut-off lift is higher than a predetermined auxiliary pressurizing pump stop pressure.
The auxiliary pressure pump device according to claim 6. The relationship between the type of the flowing water detection device and the rotation speed of the electric motor whose discharge amount is equal to or less than the first water amount at the point where the total head of the auxiliary pressurizing pump device is zero, or the first water amount and the auxiliary pressurizing pump. further comprising a memory storing a relationship between the rotational speeds of the electric motor at which the discharge amount is equal to or less than the first water amount at a point where the total head of the device is zero;
The control unit refers to the memory and obtains the rotation speed of the electric motor corresponding to the type of flowing water detection device provided in the fire pipe or the first water amount from among the stored rotation speeds. The auxiliary pressurizing pump device according to any one of claims 3 to 8, wherein the acquired rotational speed is determined as the first rotational speed. An auxiliary pressurizing pump that pumps fluid into the fire pipe in order to maintain the pressure inside the fire pipe, which is equipped with a water flow detection device that changes a signal or alarm from an OFF state to an ON state when the fire pump detects a specified water flow phenomenon. A device,
pump and
flowing water adjusting means for increasing or decreasing the discharge amount of the pump;
Equipped with
The flowing water adjusting means adjusts the discharge amount of the pump to a water amount such that a signal or alarm issued by the flowing water detection device is maintained in an OFF state,
comprising an electric motor that drives the pump,
The flowing water adjusting means is an inverter that is a variable speed means of the electric motor,
The pump is started when the pressure on the discharge side of the pump becomes equal to or less than the auxiliary pressurizing pump starting pressure, and the pressure on the discharge side of the pump becomes equal to or higher than the auxiliary pressurizing pump stopping pressure, which is higher than the auxiliary pressurizing pump starting pressure. 10. A control unit that controls the inverter to stop the pump, set the rotational speed of the electric motor to a first rotational speed or less, start the motor, and then gradually increase the rotational speed. The auxiliary pressure pump device according to item 1. Controlling the inverter to gradually increase the rotational speed means counting the operating time of the pump and shortening the acceleration time, which is a parameter of the inverter, in proportion to the counting of the operating time. 11. The auxiliary pressurization pump device according to 10. During operation of the pump, the control unit controls the rotational speed so that the pressure on the discharge side of the pump matches a predetermined target pressure,
Controlling the inverter to gradually increase the rotational speed means shortening the acceleration time, which is a parameter of the inverter, in proportion to the deviation between the target pressure and the discharge side pressure at that point. 11. The auxiliary pressurization pump device according to 10. During operation of the pump, the control unit controls the rotation speed so that the pressure on the discharge side of the pump matches a predetermined target pressure, and controls the inverter to gradually increase the rotation speed. The auxiliary pressurization according to any one of claims 10 to 12, wherein the target pressure is gradually increased from the auxiliary pressurization pump starting pressure to the auxiliary pressurization pump stop pressure over a predetermined period of time. Pressure pump equipment. During operation of the pump, the control unit controls the rotational speed so that the pressure on the discharge side of the pump matches a predetermined target pressure,
Controlling the inverter to gradually increase the rotational speed means that when the pressure on the discharge side of the pump reaches one target pressure, another target pressure higher than that is set. The auxiliary pressurizing pump device according to any one of claims 10 to 12, wherein the auxiliary pressurizing pump starting pressure is increased to the auxiliary pressurizing pump stopping pressure by repeating the above steps. After the discharge amount of the pump is adjusted to the amount of water at which the signal or alarm issued by the water flow detection device is maintained in the OFF state, the water flow adjustment means is adjusted so that the amount of water discharged from the pump is lower than the amount of water. Can increase the discharge amount,
Auxiliary pressurization pump device according to any one of claims 1 to 14. an automatic operation mode in which the pump is operated so that the discharge amount is such that the signal or alarm issued by the flowing water detection device is maintained in an off state;
having a manual operation mode in which an operator can increase the discharge amount of the pump above the water amount;
Auxiliary pressurization pump device according to any one of claims 1 to 15. Defined as the maximum amount of water flowing within the main body at which the signal or alarm changes from the OFF state to the ON state upon detection of a specified water flow phenomenon by the fire pump, and the signal or alarm issued by the water flow detection device remains OFF. In order to maintain the pressure in the fire extinguishing pipe equipped with a flowing water detection device that determines that the flowing water phenomenon has been detected if a larger amount of water than the first water amount continues to pass through the main body for a predetermined delay time or more, the extinguishing system A control panel used for an auxiliary pressurizing pump device equipped with a pump that pumps fluid into a pipe,
By controlling an inverter, which is a variable speed means of the electric motor that drives the pump, and changing the rotational speed of the electric motor, the discharge amount of the pump can be controlled so that the signal or alarm issued by the water flow detection device is maintained in an off state. Equipped with a control unit that adjusts the amount of water to
The control unit includes:
maintaining a predetermined first time less than the delay time;
The rotational speed of the pump is continuously measured for a time when the rotational speed of the pump becomes equal to or higher than the first rotational speed, which is the rotational speed of the electric motor, and becomes equal to or lower than the first amount of water, and when the time is equal to or higher than the first time, the rotation of the electric motor is started. changing the speed to below the first rotational speed,
The first rotational speed is a rotational speed of the electric motor that is equal to or less than the first water amount,
comprising an input interface that accepts the delay time of the flowing water detection device,
The control unit is a control panel that determines the first time according to the delay time accepted by the input interface. Auxiliary equipment equipped with a pump that pumps fluid into a fire extinguishing pipe equipped with a flowing water detection device that detects a specified water flowing phenomenon by a fire extinguishing pump and turns on a signal or alarm from an OFF state to an ON state. A control panel used for a pressurized pump device,
By controlling an inverter, which is a variable speed means of the electric motor that drives the pump, and changing the rotational speed of the electric motor, the discharge amount of the pump can be controlled so that the signal or alarm issued by the water flow detection device is maintained in an off state. Equipped with a control unit that adjusts the amount of water to
The control unit starts the pump when the pressure on the discharge side of the pump becomes equal to or lower than the auxiliary pressurization pump starting pressure, and the controller starts the auxiliary pressurization when the pressure on the discharge side of the pump is higher than the auxiliary pressurization pump starting pressure. When the pump stop pressure is exceeded, the pump is stopped, the rotational speed of the electric motor is set to a first rotational speed or less, the motor is started, and the inverter is controlled to gradually increase the rotational speed, is a control panel at which the rotational speed of the electric motor becomes less than or equal to a first water volume determined as the maximum water flow in the main body at which the signal or alarm issued by the water flow detection device is maintained in an OFF state.