JP4778994B2 - Fire pump device - Google Patents

Description

  The present invention relates to a fire extinguishing pump device that is disposed at a predetermined location of a building and discharges water in the event of a fire to extinguish the fire.

  In the event of a fire in a building, a fire extinguishing pump device is installed to discharge water to the location where the fire occurred as the initial fire extinguishing. As water discharge facilities, there are a fire hydrant that discharges water via a hose etc. to the place where the fire has occurred through human power, and a sprinkler head device that is placed on the ceiling to cover the necessary area, and automatically discharges water when a fire occurs. The Lord.

  Such a fire pump device is required to operate reliably and effectively in the event of a fire. For example, in the case of a fire that occurs as a secondary disaster due to an earthquake, the normal power supply is often cut off and it is often required to start up with an emergency power supply or continue operation. However, usually, a large amount of electric power is required when starting the fire pump, and there is a possibility of competing with electricity necessary for other facilities. Further, when water is discharged using a sprinkler head device, there is a possibility that water spraying in an appropriate range may not be performed unless an appropriate water discharge pressure is maintained.

  This invention was made in view of the said situation, and it aims at providing the fire-extinguishing pump apparatus which can obtain a reliable and effective operation | movement under the unfavorable conditions at the time of disaster occurrence. To do.

In order to achieve the object, the fire pump device according to claim 1 is provided with an electric pump for pumping water, a main pipe attached to a discharge side of the pump, and a branch from the main pipe. A branch pipe provided, one or a plurality of water discharge means provided along the branch pipe, a pressure detector attached to the discharge side of the pump, and a predetermined pressure applied to the water discharge means provided in the main pipe A starting pressure tank, and variable speed control means for controlling the pump so that its discharge pressure becomes a predetermined value based on an output of the pressure detector, and the starting pressure tank The pump is started when it is detected that the internal pressure of the pump has decreased , the switching from the normal power supply to the emergency power supply is detected, and based on this, the increase pattern of the rotational speed at the time of starting the pump is changed. You .
The fire-extinguishing pump apparatus according to claim 2 is the invention according to claim 1, wherein the rotational speed at the start of the pump is increased at a moderate speed at the start of the pump and increased to a certain rotational speed, The acceleration is reduced and increased as the rotational speed increases.
A fire-extinguishing pump device according to a third aspect is characterized in that, in the invention according to the first aspect, the pump is operated at a low speed to recover the pressure drop of the starting pressure tank.

According to a fourth aspect of the present invention , in the fire pump device of the first aspect , the variable speed control means includes an induction motor and an inverter provided on the power source side. Features.

A fire-extinguishing pump device according to a fifth aspect is the invention according to any one of the first to third aspects, wherein the variable speed control means includes a DC brushless motor, a voltage controller provided on a power source side thereof, and It is characterized by having.

The invention according to claim 6 is an electric pump for pumping water, a main pipe attached to the discharge side of the pump, a branch pipe provided by branching from the main pipe, and the branch pipe. One or a plurality of water discharge means provided along the pressure, a pressure detector attached to the discharge side of the pump, a pressure tank for activation provided in the main pipe and applying a predetermined pressure to the water discharge means, and the pressure When it is detected that the internal pressure of the start-up pressure tank has dropped, the pump has a variable speed control means for controlling the pump so that the discharge pressure becomes a predetermined value based on the output of the detector. The pump is started, and the rotational speed of the pump is determined by taking into account the change in frictional resistance of the pipe from the discharge port of the pump to the end of the water discharge means, and the estimated pressure at the end of the water discharge means is a predetermined value. To reach the target pressure And controlling.
The digestive pump device according to claim 7 is the invention according to claim 6, wherein the rotational speed at the start of the pump is increased at a moderate speed at the start of startup, and in a state where a certain rotational speed is reached, The acceleration is reduced and increased as the rotational speed increases.
The digestion pump device according to an eighth aspect is characterized in that, in the invention according to the sixth aspect, the pump is operated at a slow speed to recover the pressure drop in the start-up pressure tank.

A fire-extinguishing pump device according to claim 9 is the invention according to any one of claims 6 to 8 , wherein the variable speed control means includes an induction motor and an inverter provided on a power source side thereof. Features.

The fire pump device according to claim 10 is the invention according to any one of claims 6 to 8 , wherein the variable speed control means includes a direct current brushless motor, a voltage controller provided on a power source side thereof, and It is characterized by having .

According to the fire-extinguishing pump apparatus of Claim 1 thru | or 10 , even when starting and operating with an emergency power supply , a pump can be controlled and operated, considering the electric power which can be used. Further, the pump can be controlled and operated so as to maintain an appropriate water supply pressure in consideration of the water discharge facility and the location where the fire has occurred. Therefore, it is possible to provide a fire extinguishing pump device capable of obtaining a reliable and effective operation even under adverse conditions when a disaster occurs.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a diagram showing the overall configuration of a fire pump device according to a first embodiment of the present invention. In this example, the fire pump device includes a fire base 10 and a peripheral device attached to the common base 11. It is composed of a water supply unit 12 configured as a unit mounted on top, a water discharge system 14 that operates individually on three floors, a groundwater tank 16 and an auxiliary elevated water tank 17 that are water sources, and a pipe that connects them. In the event of a fire, the water supply unit 12 can supply water from the water source to the water discharge system 14 to perform initial fire extinguishing.

In the water supply unit 12, as specifically shown in FIGS. 2 to 4, the fire extinguishing pump 10, the drive motor 18, the control panel 20, the expelling water tank 22, the heat prevention escape device 24, and the piping that communicates these, A flexible pipe (flexible pipe joint), a check valve 70, a gate valve 71, a test device 68 , a pressure detector 72 for starting the pump, a suction pipe cover, a suction pipe foot valve, a starting pressure tank 74 to be described later, etc. Is provided. The fire extinguishing pump 10 is operated in a direct connection type in which a pump main body and an electric motor 18 that drives the pump main body are directly connected on a common base 11 or an integrated direct acting type. A power supply line 25 is connected to the control panel 20, and a normal power supply 27 and an emergency power supply 28 are connected to the control panel 20 via a power supply switching unit 26.

  As shown in FIG. 5, the drive motor 18 includes an induction motor 18 and an inverter (frequency converter) 30 provided on the power source side thereof, and is driven while the rotational speed of the motor 18 is controlled by the inverter 30. Can do. A DC brushless motor may be used as the motor 18 and a driver (voltage controller) may be disposed on the power source side.

  As shown in FIG. 6, the inverter 30 includes a semiconductor element 32 that controls electric power, and is disposed in the control panel 20. The inverter 30 includes an integrally provided cooling fin 34 and a means for cooling the cooling fin 34. Yes. That is, as shown in FIG. 7 and FIG. 8, the box of the control panel 20 has holes 21 such as slits and louvers for ventilation, or takes in outside air at a low temperature using a duct, 34 is being cooled. In the case of such air cooling, it is preferable to install the inverter 30 in a place where it is easy to cool by circulating air in the control panel 20. As a simpler method, as shown in FIG. 9, the cooling fin 34 may be protruded and attached to the outside of the box and directly cooled by outside air.

On the other hand, as shown in FIG. 11, the water from the cooling water pipe 46 branched from the discharge side pipe of the fire pump 10 is returned to the suction side pipe of the fire pump 10 through the water cooling jacket 48 or returned to the suction water tank. It may be. Thereby, efficient cooling can be performed using the discharge water of the fire pump 10 itself. Further, without using the water cooling jacket, the inverter 30 main body or the cooling fins 34 may be attached in direct contact with the expiratory water tank 22 so that the water stored in the expelled water tank 22 is cooled.

  As shown in FIG. 5, a control device 40 using a microcomputer is provided in the control panel 20 to perform operation of the fire pump 10, control of the rotation speed of the electric motor 18, PI control of pressure, and the like. . The control device 40 may be provided with a dedicated device for each operation so as to be linked to each other, or may be shared by a single control device.

In addition, when the pump 10 or the motor 18 is repaired or inspected, the control panel 20 detects a current and issues an alarm when the circuit breaker that cuts off electricity or the operating current of the motor 18 becomes overcurrent. An overcurrent protection device for reporting, an overload protection device for monitoring the current of the electric motor 18 to calculate the heat generation of the electric motor 18 and issuing an alarm when an overload occurs, and circuits and electric circuits after the control panel 20 An earth leakage protection device that detects a zero-phase current due to an earth leakage generated in the circuit and issues an alarm, and an AC reactor 36 that reduces harmonics generated during power conversion on the input side from an inverter AC to a DC (FIGS. 5 and 5) 6) or a DC reactor is attached.

  The noise filter prevents the high frequency generated during power conversion on the output side from the inverter DC to AC from flowing out of the control panel 20 or the external high frequency noise entering the control panel 20 and causing the control device to malfunction. 38 (see FIGS. 5 and 6) is attached.

  An arrester 23 and a lightning arrester are installed at the entrance of the connection wiring of the control panel 20 to protect the control device against surge voltage and current of induced lightning entering from the outside. On the surface of the control panel 20, an operation switch, a liquid crystal display or LED display 42 (see FIG. 10) necessary for operating the fire pump 10, and switches and setting devices for inputting various settings are attached.

  As the operation switch, a mechanical contact switch or a non-contact switch is used. The display 42 displays characters, numbers, and symbols as segments on the liquid crystal display, displays the state as a segment display, or displays the dot matrix. An LED display can be used to display the same as a liquid crystal display. In the case of an LED display, display may be performed by turning on and off the indicator lamp around the described characters, or by switching the lighting color of the indicator lamp.

  On each floor in the building, a water discharge system 14 including a closed sprinkler head 50 as a water discharge means is provided (see FIG. 1). The water discharge system 14 includes a main pipe 52 extending from the fire pump 10 along the vertical direction of the building, each floor pipe 54 branched from the main pipe 52 on each floor, and branched from each floor pipe 54 in a predetermined area of each floor along the ceiling. And a sprinkler head 50 provided at a predetermined interval along the area pipe 56. The end of the main pipe 52 is connected to the auxiliary elevated water tank 17 disposed on the rooftop or the like via an on-off valve 58 and a check valve 60, for example. An auxiliary water spigot 62 is provided at a predetermined location of each floor pipe 54 as necessary. An end test valve 64 and a pressure indicator 66 are attached to the end of each area pipe 56.

  The suction side of the fire extinguishing pump 10 is connected to a ground water tank 16 which is a water source through a suction pipe 10a. On the upper side of the fire-extinguishing pump 10, there is provided a priming water tank 22 that supplies priming water to a cavity inside the fire-extinguishing pump 10. In this expiratory water tank 22, a constant level of water level is always maintained by the fire pump 10 itself or by an external water supply means, and the fire pump 10 has the original performance. A test device 68 is provided to confirm that the

  A check valve 70 is provided at the base end portion (side connected to the water supply unit 12) of the main pipe 52, and a pressure detector 72 is provided between the on-off valve 71 on the downstream side of the check valve 70. The starting pipe 76 connected to the pressure tank 74 is joined. The start-up pressure tank 74 is managed so as to maintain a predetermined gas pressure (pressure at which water can be discharged from the sprinkler head 50 on the uppermost floor), and a predetermined pressure is always applied to the water in each pipe after the main pipe 52. is doing. Each floor pipe 54 is provided with an automatic alarm 78. The output of the automatic alarm 78 is led to the control panel 20 via the receiver 80, and the output of the pressure detector 72 is directly led to the control panel 20, respectively.

  The operation of the fire pump device having the above-described configuration will be described. When a fire occurs in a predetermined area of the building, the sprinkler head 50 in that area detects the fire. For example, the fuse metal that seals the tip of the building melts and opens, and the inside of the pipe pressurized by the activation pressure tank 74 is opened. Water is sprinkled on the area. Due to this watering, the internal pressure of the start-up pressure tank 74 rapidly decreases, and the control device 40 starts the fire pump 10 upon detecting the decrease signal. At the same time, the automatic alarm 78 detects the flow of water in each floor pipe 54 of the floor where the sprinkler head 50 is operated, and the signal is input to the control device 40, so it is determined at which floor a fire has occurred, The control device 40 controls the fire pump device so that water can be discharged on the floor.

Hereinafter, starting and control of the fire pump 10 will be described in detail.
In a preferred embodiment, the rotational speed of the fire pump 10 is variably controlled by the inverter 30 and is gradually increased (soft start) as compared with a normal pump activation. The acceleration of the soft start is increased linearly from zero to the maximum value, or is increased along the S-curve as shown in FIG.

  The advantages of increasing the rotational speed of the fire pump 10 along the S-curve are as follows. That is, when the speed is low, the sliding resistance of the sliding part of the rotating body in the electric motor 18 or the pump 10 is large, and an excessive current may flow to activate the overcurrent protection of the inverter 30. On the other hand, it is possible to prevent the operation stop for protecting the inverter 30 from occurring by relatively slowly increasing the rotation speed. In a state where a certain rotational speed has been reached, resistance such as friction is reduced, so acceleration is increased to shorten the time to reach the target pressure. As the speed increases, the centrifugal pump 10 such as the centrifugal pump 10 increases the discharge pressure in proportion to the square of the rotation speed, and therefore reduces the acceleration in order to quickly stabilize the target pressure. Thereby, it becomes difficult to perform a protective operation such as overcurrent, and the discharge pressure of the pump 10 can be stabilized at the target pressure in a faster time.

  At the time of startup, the pressure on the discharge side of the pump 10, that is, the pressure in the main pipe 52 (the detection value of the pressure detector 72) is usually lower than the target pressure due to water sprinkling from the sprinkler head 50. Therefore, the rotational speed at the minimum flow rate of the pump 10 that becomes the discharge target pressure stored in the control device 40 is calculated, and the output frequency of the inverter 30 is increased so as to correspond to this rotational speed. Thereby, the fire extinguishing by the water spray from the sprinkler head 50 is continued by the water sent from the pump 10.

  Next, the control device 40 performs PI or PID control so that the discharge pressure of the pump 10 detected by the pressure detector 72 becomes the target pressure. In one method, as shown in FIG. 13, the discharge pressure of the pump 10 is detected by a pressure detector 72, and discharge pressure constant control is performed so that the discharge pressure is constant regardless of the flow rate. In another method, as shown in FIG. 14, the flow rate is calculated from the rotational speed of the pump 10, and the change in the frictional resistance of the pipe from the discharge port of the pump 10 to the sprinkler head 50 at the end due to the change in the flow rate is taken into consideration. The estimated terminal pressure constant control is performed along the curve.

  In any case, a plurality of values are stored in advance in the control device 40 as the target pressure set value, and the required target pressure set value is determined by a signal from the automatic alarm device in the section where the sprinkler head 50 is opened. Select to perform pressure control operation. Thus, regardless of which floor sprinkler head 50 is operated or how many sprinkler heads 50 are operated, water of a predetermined pressure is supplied to the sprinkler heads 50, and therefore water sprinkling by each sprinkler head 50 is performed. The angle and watering area are maintained properly, and the efficiency of fire fighting can be increased.

  The process of controlling the fire pump 10 will be described in more detail. After a minute time has elapsed after the pump 10 starts to be started by the inverter 30, the PI control function in the control device 40 is operated, and the pressure signal from the pressure detector 72 and the target pressure are calculated by PI control and output. A command frequency signal of the inverter 30 is sent based on the value. Signal transmission uses a method of connecting between the control device 40 and the inverter 30 using an analog signal such as a current signal or a voltage signal or a digital communication signal. Further, the same function may be incorporated in the control circuit (software program) of the inverter 30.

  When the frequency of the inverter 30 increases and the discharge pressure of the pump 10 also increases and reaches the target pressure, the control device 40 causes the frequency of the inverter 30, that is, the rotational speed of the pump 10 driving motor 18, from the pressure detector 72. Control is performed by raising and lowering the frequency so that the current pressure and the target pressure coincide. If the detected pressure is higher than the target value, the frequency is decreased, and if the detected pressure is lower, the frequency is increased to converge to the target pressure.

  If the number of sprinklers from the sprinkler head 50 increases due to the expansion of the fire range and the water supply requirement increases, the discharge pressure of the pump 10 decreases, but the frequency of the inverter 30 also increases due to PI control, so the water supply flow rate The same exhalation pressure is maintained as it increases.

  When the sprinkler head 50 in another section is opened due to further fire spread and watering starts, the automatic alarm device of this system is activated, and this signal is sent via the receiver 80 to the fire pump control panel. Enter 20. At this time, if the target pressure signal stored in the control panel 20 of this system is higher than the currently operated target pressure, the control device 40 switches the target pressure to the higher one to increase the frequency of the inverter 30. . Accordingly, the fire pump 10 is operated so that the pressures of both the sprinkler heads 50 are not insufficient.

  In the event of a fire, the electrical system may be damaged by a fire or other factors (earthquake, etc.) and a power failure may occur. Therefore, in this embodiment, a backup system having an emergency power supply in addition to the normal power supply is provided. Yes. The normal power supply is supplied from an electric power company and has a large and stable capacity. On the other hand, the emergency power source uses a private power generation device or a storage battery facility, and generally has a small capacity and a low stability.

  Therefore, in the fire pump 10 of this embodiment, the following control is performed on the assumption that it is started with a normal power source at the time of initial fire extinguishing and switched to an emergency power source in the middle. That is, the fire signal and the start signal for the pressure drop due to the start-up pressure air tank (tank) return to the initial state when a power failure occurs in a normal electric circuit, and the signal disappears. Therefore, as it is, the fire-extinguishing pump 10 does not start even when energization is resumed by the emergency power supply, and the fire-extinguishing activity is interrupted. Therefore, in this embodiment, the fire pump control panel 20 allows the fire detection signal and the start signal to be input and stored in a relay having a mechanical holding mechanism or a semiconductor memory circuit having a nonvolatile memory function. It has become. Similarly, in the variable-speed fire extinguishing pump 10, various signals and information input from the outside are used in the circuit so that they can be retained even during a power failure, or the circuit is backed up with a primary battery or a secondary battery. ing. Thereby, the pump 10 can be automatically restarted at the time of power recovery.

  As described above, the emergency power supply facility is a facility that is not normally used, and from an economical point of view, the capacity is small and often exceeds the required capacity. Therefore, when many devices start at the same time when switching from the normal power source to the emergency power source, the starting current at the time of starting flows to the electric motor 18, thereby causing a shortage of power capacity and a decrease in voltage and frequency. Inability to start, abnormal heat generation of the electric equipment and the electric motor 18 occur. Therefore, in this embodiment, the control device 40 sends an operation stop signal to the control circuit and power supply equipment circuit of the electrical equipment that are unnecessary in the event of a fire to stop these equipment so that electricity does not flow. The situation is avoided.

  Furthermore, in this embodiment, priorities are assigned to disaster prevention devices according to their importance, and when power is restored, the devices are started in this order at preset time intervals. The optimal time is set according to the size of the device and the start time. When the starting time varies depending on the power supply voltage, the voltage value is taken in by the sensor and variably controlled based on this.

  Since the variable speed fire pump 10 of this embodiment has a soft start function in which the speed is made variable by using the inverter 30, for example, a speed arrival signal is returned to the control device 40 to operate all necessary equipment. The start-up time may be varied to optimize to minimize time. This allows all equipment to be completed in the required time and with minimal start-up time.

Similarly, by performing a soft start using the inverter 30 and extending the start time, the start-up rise time of the electric motor 18 can be extended, and the current value at the start-up acceleration can be reduced. That is, when the power switching device installed on the power source side of the fire pump 10 switches from the regular power source to the emergency power source, the switching signal is input to the inverter 30 via the fire pump control panel 20 to change the acceleration time. Instruct. This is because it is preferable to reduce the current value when starting with an emergency power supply because the power supply capacity is small. The acceleration time during normal power supply and emergency power supply is stored in the control panel 20 of the fire pump 10 or stored in the inverter 30.
Alternatively, it may be started by automatically changing the soft start time so as not to exceed a preset low current value while constantly monitoring the output current value of the inverter 30.

  The inverter 30 is a power conversion device, and can convert an alternating current into a direct current, and further into an alternating current, thereby creating an arbitrary alternating frequency. Harmonics are generated during rectification during the conversion from alternating current to direct current. When the power supply capacity is large, such as a normal power supply, the problem is small, but when the power supply capacity is small, such as an emergency power supply, the generator generates heat due to harmonics. Therefore, in this embodiment, in order to reduce harmonics, an AC reactor is attached to the primary power supply side of the inverter 30 and a DC reactor is attached to the DC circuit after rectification of the inverter 30. In addition, a converter circuit for rectifying the inverter 30 is provided with a sine wave PWM circuit using a switching semiconductor element, the input current waveform to the inverter 30 is made a sine wave, the generation of harmonics is small, and the power factor is close to 100%. I have to. Thereby, by suppressing the generation of harmonics and combining the soft start function, the fire extinguishing pump 10 having a small starting current and a small emergency power source capacity such as a generator can be obtained.

  FIG. 15 shows a fire pump 10 apparatus according to another embodiment of the present invention. The difference between this embodiment and the embodiment shown in FIG. 1 is that each floor pipe 54 is provided with a pressure detector 82. The pressure on each floor can be detected. By feeding back the detection values of these sensors to the control device 40, it is possible to perform the estimated end control pressure more accurately.

FIG. 16 shows still another embodiment of the present invention, which is an example applied to a connected water supply system employed in a high-rise building.
In high-rise buildings, the higher the floor, the greater the required head pressure. It is difficult and economical to pressurize such a large pressure with one pump 10 device. Each water discharge facility has a predetermined operating pressure range. Therefore, a hierarchical section divided by several levels and connected by the same pipe is configured, and a fire extinguishing pump 10 for pressurization is installed for each of these hierarchical sections. Signals can be transmitted and received by connecting to each control panel 20. On the upper floor, all lower-layer pumps 10 are activated and connected in series for use. In this example, the case of two hierarchical sections is illustrated, but in the case of a higher layer, three or more hierarchical sections are formed in the same manner.

Hereinafter, the operation of the fire pump 10 device of this embodiment will be described below.
When a fire occurs on the upper floor and the sprinkler head 50 opens and sprinkles water, a start signal is sent to the control panel 20 of the fire pump 10 at that level. The fire pumps 10 in this hierarchical section are not started immediately, and a start signal is sent to the control panel 20 of the fire pump 10 in the lowest hierarchical section. The fire extinguishing pump 10 in the lowermost tier section is operated while the motor 18 is driven by inverter control by the control device 40, and the operation is performed while controlling the pressure so that the discharge pressure is set and stored in the control device 40 in advance. Do. When the discharge pressure reaches the target pressure, a start signal is sent to the next upper fire extinguishing pump control panel 20. As a result, the water of the required amount and pressure is supplied to the fire pumps in the upper hierarchy, and the fire extinguishing water supply operation becomes possible.

  As mentioned above, although embodiment of this invention was described based on drawing, this invention is not limited to these, A various change is possible along the meaning of invention. For example, in the above, each fire extinguishing pump 10 is configured by a single pump, but at least a part of these is configured by a plurality of (for example, two) pumps 10 and selectively operated according to the situation. be able to. That is, when the required water discharge amount is large, a plurality of units are operated, and when the amount is small, only one is operated and the other is used as a spare.

  In addition, since the conventional fire-extinguishing pump 10 is difficult to operate at extremely low speeds, a jockey pump is provided to compensate for the pressure drop in the startup pressure tank 74. In the above embodiment, by adopting the inverter control system, the fire extinguishing pump 10 itself can be operated at a low speed, and the pressure drop in the start-up pressure tank 74 can be compensated. Therefore, such a jockey pump becomes unnecessary. . Such a pressure replenishment operation can be automatically performed by detecting a pressure drop in the activation pressure tank 74.

  Moreover, in said embodiment, although the groundwater tank 16 is provided as a water source, considering the cost of installation or maintenance of such a tank, connecting the fire pump 10 directly to water supply piping is proposed. . In this case, it is required that the operation of the fire pump 10 does not affect the water distribution pump in the water supply facility, but since the inverter control system is adopted in the above embodiment, the soft start as described above is performed. Such an objective can be achieved by implementation.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows the structure of the whole fire-extinguishing pump apparatus of 1st Embodiment of this invention. It is a front view which shows a water supply unit concretely. It is a side view of a water supply unit. Similarly, it is a side view of a water supply unit. It is a figure which shows the control apparatus of a fire pump apparatus. It is a figure which shows the variable control mechanism of the electric motor for a pump drive. It is a front view of a control panel. It is the (a) side view and (b) back view of a control panel. It is a side view which shows the other example of a control board. It is a figure which shows a display panel. It is a side view which shows the further another example of a control board. It is a graph which shows the rotational speed change at the time of starting of a pump. It is a graph which shows the operation curve in the case of discharge pressure constant control. It is a graph which shows the driving | running curve in the case of estimated terminal pressure control. It is a figure which shows the fire-extinguishing pump apparatus of 2nd Embodiment of this invention. It is a figure which shows the fire-extinguishing pump apparatus of 3rd Embodiment of this invention.

Explanation of symbols

10 pump 18 electric motor 22 expiratory water tank 30 inverter (variable speed control means)
36 AC reactor 38 Noise filter 40 Control device 50 Sprinkler head (water discharge means)
52 Main piping 54 Each floor piping (branch piping)
56 Area piping (branch piping)
72 Pressure detector 74 Start-up pressure tank 82 Pressure detector

Claims (10)

An electric pump that pumps water,
A main pipe attached to the discharge side of the pump;
A branch pipe provided by branching from the main pipe;
One or more water discharge means provided along the branch pipe;
A pressure detector attached to the discharge side of the pump;
A starting pressure tank provided in the main pipe for applying a predetermined pressure to the water discharge means;
Variable speed control means for performing variable speed control so that the discharge pressure of the pump becomes a predetermined value based on the output of the pressure detector;
Start the pump when it detects that the internal pressure of the starting pressure tank has dropped ,
A fire-extinguishing pump device that detects a switching from a normal power source to an emergency power source and changes a rotation speed increase pattern at the time of starting the pump based on the switching .   The rotational speed at the time of starting of the pump is gradually increased at the beginning of startup, the acceleration is increased when the rotational speed reaches a certain rotational speed, and the acceleration is decreased and increased as the rotational speed increases. Item 2. The fire pump device according to Item 1.   The fire-extinguishing pump device according to claim 1, wherein the pump is operated at a slow speed to recover a decrease in pressure in the start-up pressure tank.   The fire pump apparatus according to any one of claims 1 to 3, wherein the variable speed control means includes an induction motor and an inverter provided on a power source side thereof.   The fire pump apparatus according to any one of claims 1 to 3, wherein the variable speed control means includes a DC brushless electric motor and a voltage controller provided on a power source side thereof. An electric pump that pumps water,
A main pipe attached to the discharge side of the pump;
A branch pipe provided by branching from the main pipe;
One or more water discharge means provided along the branch pipe;
A pressure detector attached to the discharge side of the pump;
A starting pressure tank provided in the main pipe for applying a predetermined pressure to the water discharge means;
Variable speed control means for performing variable speed control so that the discharge pressure of the pump becomes a predetermined value based on the output of the pressure detector;
Start the pump when it detects that the internal pressure of the starting pressure tank has dropped,
The rotational speed of the pump is controlled so that the estimated pressure at the end of the water discharge means becomes a predetermined target pressure in consideration of the change in the frictional resistance of the pipe from the discharge port of the pump to the end of the water discharge means. extinguishing fire pump equipment shall be the feature to be. The rotational speed at the time of starting of the pump is gradually increased at the beginning of startup, the acceleration is increased when the rotational speed reaches a certain rotational speed, and the acceleration is decreased and increased as the rotational speed increases. Item 7. The fire pump device according to Item 6. The fire-extinguishing pump device according to claim 6, wherein the pump is operated at a slow speed to recover a decrease in the pressure of the start-up pressure tank. The fire pump apparatus according to any one of claims 6 to 8, wherein the variable speed control means includes an induction motor and an inverter provided on a power supply side thereof. The fire pump apparatus according to any one of claims 6 to 8, wherein the variable speed control means includes a DC brushless electric motor and a voltage controller provided on a power source side thereof.

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