JP2014155636A - Fire pump system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fire pump system which uses a plurality of control systems in common by integrating them, and in which bypass circuits are embedded in the control systems at a failure of an inverter.SOLUTION: A control device for controlling a fire pump system comprises: a calculation part for performing pressure control; setting means for setting a parameter and a control mode which are necessary for the pressure control, and selecting the set control mode; and a storage part for storing the parameter and the control mode. The control mode is set to a plurality of modes by a combination of a kind of a fire implement being a water-sending object, a kind of a transmission source of a start command, a kind of setting at which target pressure is set, and a kind of a pressure control system. The control device controls a frequency of an inverter so that water-sending pressure detected by pressure detection means reaches a set target pressure value on the basis of the control mode which is selected by the setting means.

Description

  The present invention relates to a fire extinguishing pump system including a pump driven at a variable speed by an inverter. The fire pump system here refers to a system including a fire hydrant pump system and a sprinkler pump system.

  The fire pump system must be quickly operated and watered in the event of a fire by means of a fire detector or human operation. For this reason, a highly reliable system is required for water supply, but an inverter-driven fire pump system has been rarely used in the past. However, with the widespread use of inverters, there is a trend to adopt inverters for fire pump systems. As these known examples, there are Patent Document 1 and Patent Document 2.

  In the fire fighting system (sprinkler) of Patent Document 1, for example, in paragraph (0025), “Pressurized water supply device 4 includes two pumps driven by motors. The number of rotations of the motor that drives the pump is controlled based on the pressure control signal from the device 5 so that the water supply pressure is set to a predetermined value, and the pressurized water supply device 4 controls the amount of water supplied from the control device 5. Based on the signal, the number of pumps to be started is changed, so that the water supply amount is set to a predetermined value.The present invention does not limit the method of controlling the number of revolutions of the motor that drives the pump, It is desirable to control the rotational speed of the motor to be driven by inverter control such as a VVVF inverter (variable voltage variable frequency inverter) that directly varies the rotational speed. It is disclosed to.

  Further, in the fire pump device of Patent Document 2, the setting of the target pressure in the paragraph (0040) is made by storing a plurality of values in the control device 40 in advance, and from the automatic alarm device of the section where the sprinkler head 50 is opened. There is a disclosure that a pressure control operation is performed by selecting a required target pressure set value based on the above signal. However, a predetermined pressure is supplied to the sprinkler head regardless of which floor sprinkler head is operated or how many sprinkler heads are operated. Therefore, although a plurality of values (target pressures PA and PB) are stored, the values of the target pressures PA to PB are always selected regardless of the order from which the signal comes. Are not selected in a one-to-one correspondence.

JP 2005-253532 A JP 2006-20846 A

  In the inverter-driven fire pump system, there are two types of fire extinguishing equipment (fire extinguishing equipment) that are subject to water supply: a fire hydrant and a sprinkler, and when a start command is issued from the pressure detection means of the pump system (sprinkler) ) And when fired from fire extinguishing equipment (fire hydrant and sprinkler). Moreover, there are two types of setting of the target pressure at the time of pump operation, that is, a case where the target pressure is set in advance, and a case where the target pressure is set by a fire extinguishing device that has issued a start command. Furthermore, there are two types of pressure control methods during pump operation: constant terminal pressure for controlling the terminal pressure of fire extinguishing equipment and constant discharge pressure control for controlling the pump discharge pressure constant. When combined, there are five types of control systems.

  In the fire pump system, if a control system that can share these five types can be realized, the cost of the system can be greatly reduced. In addition, a bypass circuit for switching and connecting the power source of the fire pump from the inverter to the commercial power source when the inverter fails is externally attached to the control system, and if this can be built in the control system, the cost of the system can be greatly reduced.

  Conventionally, a start command, a target pressure setting, and a pressure control method are generally configured by a dedicated control system in accordance with a fire extinguishing device installed in a fire extinguishing facility. Patent Document 1 describes a case where there are many types of fire extinguishing devices, but the setting of the start command and the target pressure is determined exclusively, and there is no clear description of the pressure control method. Patent Document 2 discloses a control system that performs constant discharge pressure control or constant terminal pressure control corresponding to a sprinkler.

  In Patent Literature 1 and Patent Literature 2, since the five types of control systems are not shared, it is difficult to reduce the cost of the system. Further, since the bypass circuit for switching the power source of the fire extinguishing pump from the inverter to the commercial power source when the inverter fails is independent from the control system, it is difficult to reduce the cost of the system.

  A first object of the present invention is to provide a fire pump system using a control system in which the plurality of control systems are integrated and shared.

  Furthermore, the second object is to provide a fire extinguishing system in which a bypass circuit is built in a control system when an inverter fails.

In order to achieve the above object, the present invention provides a fire extinguishing pump that feeds water from a water source to a fire extinguishing apparatus group provided on each floor on the demand side through a water pipe,
An electric motor that drives the fire pump;
An inverter for driving the electric motor;
Pressure detecting means for detecting the pressure on the discharge side of the fire pump,
A fire extinguishing appliance provided with a start command signal transmission means provided for each floor of the water pipe,
In the fire-extinguishing pump system configured with a control device that takes in signals from the pressure detection means and the start command signal transmission means and performs pressure control and outputs a frequency command signal to the inverter,
The control device includes a calculation unit that performs pressure control, a setting unit that sets a parameter and a control mode necessary for the pressure control and selects the set control mode, and a storage unit that stores the parameter and the control mode. ,
The control mode is set to a plurality of modes depending on the combination of the type of fire extinguishing equipment that is the target of water supply, the type of transmission source of the start command, the setting type for setting the target pressure, and the type of pressure control method,
The control device controls the frequency of the inverter based on the control mode selected by the setting unit so that the water supply pressure detected by the pressure detection unit becomes the set target pressure value. And

In order to achieve the above object, the present invention provides a fire extinguishing pump that feeds water from a water source to a fire extinguishing apparatus group provided on each floor on the demand side through a water pipe,
An electric motor that drives the fire pump;
Pressure detecting means for detecting the pressure on the discharge side of the fire pump,
A fire extinguishing appliance provided with a start command signal transmission means provided for each floor of the water pipe,
In the fire-extinguishing pump system configured with an inverter that takes in signals from the pressure detection means and the start command signal transmission means, performs pressure control and sets a frequency signal and outputs electric power to drive the electric motor,
The inverter includes an arithmetic unit that performs pressure control, a setting unit that sets a parameter and a control mode necessary for the pressure control and selects the set control mode, and a storage unit that stores the parameter and the control mode.
The control mode is set to a plurality of modes depending on the combination of the type of fire extinguishing equipment that is the target of water supply, the type of transmission source of the start command, the setting type for setting the target pressure, and the type of pressure control method,
The inverter controls the motor by controlling the frequency based on the control mode selected by the setting means so that the water supply pressure detected by the pressure detection means becomes the set target pressure value. It is characterized by.

  Further, in the fire pump system described above, the control mode includes two types of a fire hydrant and a sprinkler for water supply, two types of pressure detection means and a fire extinguishing device (fire hydrant and sprinkler) for a start command, and a target pressure. A plurality of modes are set in combination of two types of presetting and setting with a fire extinguishing device, and two types of pressure control method, constant terminal pressure and constant discharge pressure.

  Further, in the fire pump system described above, the inverter further includes a bypass circuit that switches the electric motor to a commercial power source when the inverter fails, so that the water supply pressure detected by the pressure detection unit becomes the target pressure value. The frequency is controlled, and a switching command signal is output to the bypass circuit when the inverter fails.

  Further, in the fire pump system described above, the control device further includes a bypass circuit that switches the electric motor to a commercial power source when an inverter malfunctions, so that the water supply pressure detected by the pressure detection unit becomes the target pressure value. And controlling the frequency of the inverter and outputting a switching command signal to the bypass circuit when the inverter fails.

  According to the present invention, the fire pump system can be controlled by the common control system by selecting the parameters and the control mode even if the fire extinguisher type, the pressure control method, or the like changes. Can be greatly reduced. Also in the manufacturing process, it is possible to provide an inexpensive fire pump system that can simplify troublesome management such as management and identification of parts (control system).

  In addition, by providing a bypass circuit in the inverter for switching the power supply when the inverter fails, the control system is simplified, which can contribute to the compactness and low price of the fire pump system.

  And a fire extinguishing pump system can be comprised compactly by integrating an inverter and a control apparatus.

1 is a system diagram of a fire pump system for a sprinkler according to an embodiment of the present invention. A system diagram of a fire pump system for hydrant consumption. The pump performance curve figure at the time of performing discharge pressure constant control similarly. The pump performance curve figure at the time of performing similarly terminal pressure constant control. The circuit block diagram of a control panel. The inverter circuit diagram which integrated the control apparatus and the inverter. The inverter circuit diagram which incorporates a commercial power supply bypass circuit. Explanatory drawing which showed control mode and operation | movement content. The pump performance curve figure which shows the algorithm of discharge pressure constant control. The flowchart which shows the algorithm of discharge pressure constant control. The flowchart which shows the algorithm of terminal pressure constant control. The figure for demonstrating the control flow of an Example of this invention. Detailed view of a fire hydrant.

Hereinafter, an embodiment of the present invention will be described with reference to FIGS.
First, the type of the inverter-driven fire extinguishing system will be described. The fire pump system has two types of water supply targets: fire hydrant and sprinkler, two types of start commands: pressure detection means and fire extinguishing equipment (fire hydrant and sprinkler), two pressure settings: preset and fire extinguishing equipment, pressure control There are two types of methods: constant end pressure and constant discharge pressure. When this is combined, as shown in FIG. 8, there are about five types of control modes (control modes NO. 1 to NO. 5).

  FIG. 1 shows a system diagram of an inverter-driven fire pump system applied to water supply for sprinkler fire extinguishing water according to this embodiment, and illustrates 10 stories. In order to simplify the explanation, the illustration below the seventh floor is omitted. 1 is a water source, for example, a fire extinguishing water tank. 4 is a fire extinguishing pump, and a suction pipe 3 having a foot valve 2 attached to the tip is provided on the suction side, and water is supplied to the water supply pipe 10. The fire pump 4 is provided with a check valve 6 and a gate valve 7 on the discharge side. Reference numeral 14 denotes a pressure tank attached in the vicinity of the fire pump discharge side of the water pipe 10, and has an air reservoir inside to maintain and maintain the water pipe pressure. Reference numeral 9 is a pressure detection means located in the vicinity of the pump and attached to the water supply pipe 10, and transmits an electric signal S11 corresponding to the pressure here. The transmitted electrical signal S11 is received by the control panel 8 described later.

  The water pipe branch pipes 10-1 to 10-3 for each floor of the water pipe 10 are respectively provided with sprinklers 10-1a to e to 10-3a to constitute a sprinkler group. 10-1 s to 10-3 s are discharge devices (start command signal transmitting means) for detecting water discharge when the sprinklers having floor heights of 8F to 10F are opened and emitting discharge signals (start command signals), It corresponds to the sprinkler for each floor one-on-one, and is attached to a part where the floor height can be specified. For convenience, reference numerals 10-1 s to 10-3 s are also used for the discharge signal start command signal of the discharge device. These signal groups are transmitted to the control panel 8 as S13. And electric power of variable frequency and variable voltage is supplied to the electric motor 5 by power cable S10.

  Although the control panel 8 will be described in detail later, the inverter and the control device are provided separately, or the inverter and the control device are integrated. The release signals (start command signals) 10-1s to 10-3s transmitted from the sprinklers on each floor are position information indicating which floor the floor is, and the floor is specified by this position information, and necessary transmission is performed for each floor. A water amount, a water supply pressure (target pressure) (or an initial inverter frequency corresponding thereto), or a water supply amount required for each floor, a water supply pressure (target pressure), and an initial inverter frequency corresponding thereto are determined. The pressure, the water supply amount, and the inverter frequency based on the position information are fixedly determined in the storage unit M described later.

  FIG. 2 is a system diagram of an inverter-driven fire hydrant pump system in which the inverter-driven fire hydrant pump system of the present embodiment is applied to a fire hydrant fire extinguishing facility in a building. The pressure tank of the system shown in FIG. 1 is omitted, and instead of the sprinkler, the discharge device, and the discharge signal, fire hydrants 10-1a to 10-3a and start command signals 10-1s to 10-3s thereof are used. This fire hydrant is pulled in by branch pipes 10-1 to 10-3 of the water pipe 10, as shown in FIG. 13, and a start pushbutton switch (start command signal transmitting means) 22, an emergency bell 23, a start display lamp 24, a hose. 25 and a nozzle 26 are provided. When the start pushbutton switch 22 is operated, start command signals 10-1s to 10-3s indicating that the start command signal has been transmitted are transmitted.

FIG. 3 is a performance curve diagram of the fire pump when the fire pump system shown in the system diagram of FIGS. 1 and 2 is operated at a predetermined pressure setting value for each floor, and the discharge amount (m ³ / min), the vertical axis indicates the total lift (m). The predetermined amount of water Q0 is the amount of water necessary to send water to a fire hydrant of a water pipe terminal, a sprinkler discharge device or the like (hereinafter collectively referred to as a fire extinguishing device), and when displayed on a pump performance curve diagram It is shown as the discharge amount. In this embodiment, Q0 is constant, but may be changed for each fire extinguishing device.

  The pressure setting value H010F is a pressure setting value (target pressure head) necessary for supplying water to the fire extinguishing equipment of the water pipe terminal on the 10th floor, resistance loss of the water pipe etc. (R10 in the figure), actual head ( (Not shown), including the required end pressure (not shown) on the fire extinguishing appliance and shown as a full head when displayed on the pump performance curve diagram. In this embodiment, the fire extinguishing appliances on the 10th floor water pipe terminals are at the highest and farthest points, and if water can be supplied here, water can be supplied to other fire extinguishing appliances.

  Further, as a pump, if a point satisfying a predetermined water amount Q0 and a pressure set value H010F is a specification point O1, it is necessary to select a pump having a pump QH performance curve A obtained when operating at an inverter frequency f10. It is. That is, the pump performance curve A, the pressure set value H010F, and the water supply pipe resistance curve R10 are selected so as to intersect at the specification point O1.

  Similarly, H09F is a pressure setting value (target pressure head) required to supply a predetermined amount of water Q0 to the fire extinguishing appliances of the water pipe terminals on the ninth floor and H08F, respectively. Since the pressure setting value required to send water to the fire extinguishing equipment of each water pipe terminal less than the 8th floor is obvious from the above explanation, the explanation is omitted. These pressure set values (target pressure heads) are set when a start command signal is transmitted from the fire extinguishing device of the water pipe terminal and the control panel (control device or inverter) 8 receives it.

FIG. 4 is a performance curve diagram of the fire pump when the fire pump system shown in the system diagram of FIGS. 1 and 2 is operated with the terminal pressure constant control at the pressure setting value on the top floor and the automatic inspection program. Yes, the discharge amount (m ³ / min) is shown on the horizontal axis, and the total head (m) is shown on the vertical axis. What is indicated by the same symbol as in FIG. 3 is the same performance function, so the description is omitted.

  The reason for using the pressure setting value on the top floor is that when using the start command signal from the fire extinguishing equipment of the water pipe terminal, the pressure setting value for each floor is determined accordingly, but without using this When using the pressure change, the pressure setting value for each floor is not fixed, so the pressure setting value for the 10th floor (in this example, the highest and farthest, as shown in Fig. 4, water can be sent here) If possible, use water to other fire extinguishing equipment). The pressure set value H010F means the upper limit set value, H010FL is the lower limit set value, and f12 is the inverter frequency thereof. These set values are stored in advance in a nonvolatile storage unit (described later). The nonvolatile storage unit referred to here is one in which data stored when the power is turned off is not lost.

  FIG. 5 is a circuit configuration diagram of the control panel 8 described with reference to FIGS. PW (R, S, T) is a power supply, R (or R1), S is a control power supply, MBD and MBV are circuit breakers, INV is an inverter, and includes frequency setting means CONS having an operation display section. The CU is a control device, and includes a calculation unit CPU that performs pressure control, a nonvolatile storage unit M, an input / output interface I / O2, I / O3, a setting unit CONS2 having a display unit, and the like. TR is a transformer, I / O1 is an input circuit section for capturing start command signals 10-1 s to 10-3 s (corresponding to floor heights ... 8F to 10F) from fire extinguishing equipment for each floor, and X is captured Start command signal. . . . This is a relay group that turns ON when 8F to 10F are ON. 52D and 52V are electromagnetic relays, 49P is a thermal relay, IM is an electric motor, and 43S is a switch for switching a pump (electric motor) to a commercial-stop-inverter operation control mode.

  The input / output interface I / O2 takes in the signals of the relay group X (corresponding to the start command signals... 8FX, 9FX, 10FX). Based on these start command signals (position information), a predetermined pressure (total lift = target pressure) required for the fire extinguishing appliance is set or stored in the storage unit M. In the storage unit M, the pressure setting value for operating the fire pump, the inverter initial frequency, the pressure setting value during operation and the inverter frequency, the operation control mode (control mode of FIG. 8, INV operation / commercial operation), water supply pressure Data and the like are stored in advance. The control operation control mode is previously set and stored in the storage unit M by the setting means CONS2.

  Similarly, the input / output interface unit I / O3 takes in the signal S11 of the pressure detection means 9, outputs an ON signal to the operation command relay X, and outputs frequency command signals AN0 and CM1 to the inverter INV.

  Further, bypass circuits (main circuits) 52Da and 49P are provided for switching and connecting the electric motor IM to a commercial power source when the inverter fails. When the inverter INV fails, a switching command signal S-INV for turning on the electromagnetic switch 52D is output from the inverter to the bypass circuit. When the electromagnetic switch 52D is turned on, the contact 52Va is opened and the contact 52Da is closed, and the electric power is supplied to the electric motor IM by switching from the inverter power supply to the commercial power supply.

  FIG. 6 is a circuit diagram of the control panel 8 and others, and is an inverter circuit diagram in which the control device and the inverter are integrated. In the same figure, PW (R, S, T) is a power source, ELB is a circuit breaker that protects against leakage and short circuit of the subsequent circuits, and INV is an inverter provided with setting means CONS having an operation display section. A start command signal from a fire extinguishing device provided in the analog input terminals C, A0, A1 and a water pipe terminal for reading a signal from a calculation unit CPU for performing pressure control, a non-volatile storage unit M, and a pressure detection means 9 (SW) A digital input terminal Di for receiving 10-1S to 10-3S (signal cable S3) and a communication input terminal Tu for receiving the start command signals 10-1S to 10-3S (communication cable S2) are also provided.

  When the start command signals 10-1S to 10-3S are ON-OFF signals, the digital input terminal Di is used, and when the start command signals 10-1S to 10-3S are communication signals, the communication input terminal Tu is used. Here, the communication signal is a communication signal transmitted by wire or wireless.

  In the non-volatile storage unit M, the pressure setting value and the inverter initial frequency for operating the fire pump, the pressure setting value and the inverter frequency during operation, the operation control mode (operation control mode of FIG. INV operation / commercial operation), water supply pressure data, etc. are set and stored. I / O1 is the start command signal from the fire extinguishing equipment for each floor. . . This is an input terminal for fetching 10-1S to 10-3S (corresponding to floors... 8FX to 10FX). Then, the processing shown in the flowcharts of FIGS. 10 to 12 described later is stored as a program in the arithmetic unit CPU of the inverter INV.

  FIG. 9 shows a pump performance curve diagram for explaining the discharge pressure constant control showing the fluctuation range of the example in which the pressure set value when water is supplied to the 10th-floor sprinkler water discharge device is H010F.

  As shown in FIG. 6, if the control device is integrated with the inverter circuit, the number of elements, the number of input terminals, and the number of wires can be greatly reduced, so that the fire pump system can be configured compactly and inexpensively.

  FIG. 7 is an inverter circuit diagram in which the above-described inverter circuit of FIG. 6 is provided with a bypass circuit for switching to a commercial power source when the inverter fails. To is an input terminal to which control power sources R and S are input. The bypass circuit includes a circuit switch SS and an electromagnetic switch 52. When the inverter INV fails, a switching command signal (not shown) is output, the switch SS is closed, the electromagnetic switch 52 is turned on, and the contact 52 Is closed and the power supply contact (not shown) of the inverter is opened to switch from the inverter power supply to the commercial power supply to supply power to the motor IM. If comprised in this way, by connecting a bypass circuit in an inverter, the connection with the exterior of an inverter can be simplified and reduced in size, and the further cost reduction of a fire pump system can be aimed at.

  5, 6, and 7, when the circuit breakers MBD and MBV are turned on and the switch 43 </ b> S is switched to INV (in the case of FIG. 5), the inverter can be operated. Alternatively, when the earth leakage breaker ELB is turned on and the switch SS is closed, the apparatus can be operated with a commercial power source.

  Next, the control mode set in the storage unit M by the setting unit CONS and the operation content will be described with reference to FIG.

Control mode No.1
Operation is started when a start command is transmitted from the fire hydrant of the fire extinguisher. Based on the start command signal transmitted from the fire hydrant, the pressure set value is set, and the discharge pressure constant control for each floor is performed so that the water supply pressure detected by the pressure detecting means becomes the pressure set value. (See FIGS. 2, 3, 9, 10, and 12)

Control mode NO. 2
Operation is started when a start command is transmitted from the fire hydrant of the fire extinguisher. The pressure set value is set in advance with the value on the top floor, and the terminal pressure constant control is performed so that the water supply pressure detected by the pressure detecting means becomes the pressure set value. (See FIGS. 2, 4, 11, and 12)

Control mode NO. 3
The operation is started when the water supply pressure detected by the pressure detection means becomes equal to or lower than the starting pressure. The pressure set value is set in advance with the value on the top floor, and the terminal pressure constant control is performed so that the water supply pressure detected by the pressure detecting means becomes the pressure set value. The sprinkler of the fire extinguishing device is maintained at a predetermined pressure. (See Figs. 1, 4, 11, and 12)

Control mode NO. 4
Operation is started when a start command is transmitted from the sprinkler of the fire extinguishing appliance. A pressure set value is set from the fire extinguishing appliance based on the start command signal, and the water discharge pressure detected by the pressure detecting means is discharged at every floor so as to perform the constant pressure control. (See FIG. 1, FIG. 3, FIG. 10, FIG. 11, FIG. 12)

Control mode NO. 5
The operation is started when the water supply pressure detected by the pressure detection means becomes equal to or lower than the starting pressure. A pressure set value is set from the fire extinguishing appliance based on the start command signal, and the water discharge pressure detected by the pressure detecting means is discharged at every floor so as to perform the constant pressure control. (See FIG. 1, FIG. 3, FIG. 10, FIG. 11, FIG. 12)

  FIG. 12 is a flowchart showing main processing and pressure control processing (algorithm). In the meantime, the middle of the relationship with the present invention is omitted. For convenience of explanation, it is assumed that the start command signal is generated on the 10th floor.

  In step 599, an operation control mode determination process is executed to determine whether the operation is an inverter operation or a commercial bypass operation. If it is an inverter operation, the process proceeds to step 600A, and if it is a bypass operation, the display is omitted but the process proceeds to step 600J.

  Although explanation of the control mode is omitted, for example, the control mode NO. 1 is stored in the storage unit M in advance, and if selected by the setting means CONS, the control mode NO. 1 is read and determined by the calculation unit CPU. The description will be continued assuming that the power supply is set to inverter operation.

  In step 600A, control mode NO. It is determined whether it is 1. If the result of determination is YES, the process proceeds to step 600, and if NO, the process proceeds to step 600B. Since the control mode setting in this case is also the same as described above, a description thereof will be omitted. Control mode NO. 1, in step 600, it is determined that a start command signal has been transmitted from the fire hydrant on the top floor (in the embodiment, the top floor is 10F), and the process proceeds to step 601. In step 601, based on the start command signal, the pressure set value and the inverter initial frequency are set to values corresponding to the 10th floor (of course, also stored in the storage unit M), and the process proceeds to step 608.

  If transmission of the start command signal is not the top floor, execute steps 602 to 607 in sequence, find the floor from which the start command signal is transmitted, and set the pressure setting value and inverter initial frequency for the corresponding floor Proceed to step 608. In the processing of 608 to 609A, the operation processing of the fire extinguishing pump and the pressure control processing described later are executed in 610 steps.

  600A step control mode NO. The description returns to the determination process 1. Here, if NO is determined, the process proceeds to step 600B where control mode NO. A determination is made as to whether or not 2. If the result of determination is YES, the process proceeds to step 600C, and if NO, the process proceeds to step 600D. Control mode NO. In the second processing step 600C, the pressure set value and the inverter initial frequency are set to values corresponding to the highest floor, and the operation proceeds to the operation processing of 608 steps. Since this operation process is clear from the above description, a description thereof will be omitted.

  The control mode NO. Setting the pressure setting value and the inverter initial frequency with the value corresponding to the highest floor in the process of 2 is performed by using the pressure setting value set in advance without using the pressure setting value based on the start command signal from the fire hydrant (fire hydrant). Since the value is used, it is set so as to cope with the worst condition on the top floor. (See Figure 8)

  In 600D step, the control mode NO. 3. If YES, the process proceeds to step 600E. If NO, the process proceeds to step 600G. Control mode NO. In step 600E, which is the third processing, the pressure set value and the inverter initial frequency are set to values corresponding to the highest floor, and the process proceeds to step 600F. Control mode NO. 3 is a start command from the pressure detection means, and it is determined here whether the water supply pressure is equal to or lower than a preset start pressure. If it is YES, it will progress to the operation processing after 608 steps. If NO, return to the first 599 steps. Hereinafter, since it is clear from the above description, it abbreviate | omits description. Control mode NO. 3-Control mode NO. In 5, the fire extinguishing appliance is a sprinkler.

  Next, switching processing by a bypass circuit that switches the power supply at the time of inverter failure to a commercial power supply will be described. In step 599, it is determined whether the inverter has failed along with the control mode determination. If the result of the determination is that there is a failure, the illustration is omitted, but the process proceeds to the processing after step 600J, the power output from the inverter to the motor is cut off, and the electromagnetic switch 52 (FIG. 7) or 52D. Signals SS (FIG. 7) and S-INV (FIG. 5) for turning ON (FIG. 5) are output, and the fire extinguishing pump is switched to the operation of the commercial power supply by the bypass circuit.

  In step 610, although not shown, whether the discharge pressure constant control or the terminal pressure constant control is selected is determined in the control mode NO. Judgment by That is, the control mode NO. 1, 4, and 5 are the discharge pressure constant control for each floor, and the control mode NO. 2 and 3 are terminal pressure constant control.

  First, it will be described with reference to FIG. 10 that the constant discharge pressure control for each floor is selected. Here, as described above, the pressure set value is set to H010F, and the inverter initial frequency is set to f10. The water pressure H (using the symbol H for convenience of explanation) is detected by the pressure detection means 9 in 500 steps, and the pressure set value H0 (using the symbol H0 for convenience of explanation, but H0 = H010F as described above) in the step 501. ) And water supply pressure H. As a result of comparison, if H0−α> H, the process proceeds to step 502, and after executing the inverter acceleration control process, the process of storing the inverter frequency after the acceleration in the nonvolatile storage unit M is executed in step 505. Return to step 500.

  If the determination in step 501 is H0 + α <H, the process proceeds to step 503, and after executing the inverter deceleration control process, the process of storing the inverter frequency after deceleration in the nonvolatile storage unit M is executed in step 504, and 500 steps Return to.

  If the determination in step 500 is H0−α <= H <= H0 + α, the process proceeds to the next step 614. Hereinafter, by continuing the above-described processing, the water supply pressure becomes equal to the pressure setting value for each floor. Α indicates the dead time of the target pressure and is approximately 1 to 2 m, and a indicates the shift control width of the inverter and is appropriately set at 0.1 to 1 Hz.

  In the pump performance curve of FIG. 9 with constant discharge pressure control, the shift width control is f10 ′ to f10 ″ around the frequency f10, and the pump QH performance curves are A ′, A, A ″.

  Next, description will be made with reference to FIG. 11 assuming that the constant terminal pressure control is selected. In FIG. 11, the processes indicated by the same step symbols as those in FIG. 10 will not be described for the same processes as in FIG. 10. The processing in step 506 is processing for updating the target pressure setting value after the pressure setting values match in step 501. After the update, control is performed based on the updated new pressure set value. The target pressure setting value is the pressure on the pipe resistance curve R10 shown in FIG. 4, and is obtained based on the function or table of the pipe resistance curve and the current inverter frequency. That is, when the processing of FIG. 11 is executed, control is performed along the pipe resistance curve R10, and constant terminal pressure control is obtained.

  As described above, in the fire fighting pump system, even if different types of fire extinguishing appliances are connected to the water pipe or the type such as the pressure control method changes, the parameters and control modes set by the setting means Since the pressure control can be realized by a common control system by selecting, the cost of the fire pump system can be greatly reduced. Also in the manufacturing process, troublesome management such as management and identification of parts (control system) can be simplified, and a fire pump system with low manufacturing cost can be provided. Further, the system can be made compact by integrating the inverter and the control device.

  By providing the inverter with a bypass circuit that switches the power supply when the inverter fails, the control system is simplified, and the system can be reduced in size and cost.

  DESCRIPTION OF SYMBOLS 1 ... Water source, 2 ... Foot valve, 3 ... Suction pipe, 4 ... Pump, 5 ... Electric motor, 6 ... Check valve, 7 ... Gate valve, 8 ... Control panel (inverter, control apparatus), 9 ... Pressure detection means, DESCRIPTION OF SYMBOLS 10 ... Water pipe, 10-1 to 10-3 ... Water pipe branch pipe, 10-1a to 10-3e ... Fire extinguishing appliance (sprinkler or fire hydrant), 10-1S to 10-3S ... Start command signal transmission means (start Command signal), INV ... inverter, CU ... control device, CPU ... calculation unit, CONS, CONS2 ... setting means, M ... storage unit.

Claims (5)

A fire pump that feeds water from a water source to a group of fire extinguishing equipment on each floor on the demand side through a water pipe;
An electric motor that drives the fire pump;
An inverter for driving the electric motor;
Pressure detecting means for detecting the pressure on the discharge side of the fire pump,
A fire extinguishing appliance provided with a start command signal transmission means provided for each floor of the water pipe,
In the fire-extinguishing pump system configured with a control device that takes in signals from the pressure detection means and the start command signal transmission means and performs pressure control and outputs a frequency command signal to the inverter,
The control device includes a calculation unit that performs pressure control, a setting unit that sets a parameter and a control mode necessary for the pressure control and selects the set control mode, and a storage unit that stores the parameter and the control mode. ,
The control mode is set to a plurality of modes depending on the combination of the type of fire extinguishing equipment that is the target of water supply, the type of transmission source of the start command, the setting type for setting the target pressure, and the type of pressure control method,
The control device controls the frequency of the inverter based on the control mode selected by the setting unit so that the water supply pressure detected by the pressure detection unit becomes the set target pressure value. And fire fighting pump system. A fire pump that feeds water from a water source to a group of fire extinguishing equipment on each floor on the demand side through a water pipe;
An electric motor that drives the fire pump;
Pressure detecting means for detecting the pressure on the discharge side of the fire pump,
A fire extinguishing appliance provided with a start command signal transmission means provided for each floor of the water pipe,
In the fire-extinguishing pump system configured with an inverter that takes in signals from the pressure detection means and the start command signal transmission means, performs pressure control and sets a frequency signal and outputs electric power to drive the electric motor,
The inverter includes an arithmetic unit that performs pressure control, a setting unit that sets a parameter and a control mode necessary for the pressure control and selects the set control mode, and a storage unit that stores the parameter and the control mode.
The control mode is set to a plurality of modes depending on the combination of the type of fire extinguishing equipment that is the target of water supply, the type of transmission source of the start command, the setting type for setting the target pressure, and the type of pressure control method
The inverter controls the motor by controlling the frequency based on the control mode selected by the setting means so that the water supply pressure detected by the pressure detection means becomes the set target pressure value. Fire extinguishing pump system characterized by The fire pump system according to claim 1 or 2,
The control mode includes two types of a fire hydrant and a sprinkler for water supply, two types of pressure detection means and a fire extinguishing device (fire hydrant and sprinkler) of a start command transmission source, presetting a target pressure and setting by a fire extinguishing device. A fire extinguishing pump system characterized in that a plurality of modes are set by combining two types of types, pressure control type terminal pressure constant and discharge pressure constant. In the fire pump system according to any one of claims 1 to 3,
The inverter further includes a bypass circuit that switches the electric motor to a commercial power source when the inverter fails, and controls the frequency so that the water supply pressure detected by the pressure detection means becomes the target pressure value. A fire extinguishing pump system characterized by outputting a switching command signal to a circuit. In the fire pump system according to claim 1,
The control device further includes a bypass circuit that switches the electric motor to a commercial power source when the inverter fails, and controls the frequency of the inverter so that the water supply pressure detected by the pressure detection means becomes the target pressure value. A fire extinguishing pump system that outputs a switching command signal to the bypass circuit when a failure occurs.

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