JP2001187164A - Pressure control system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pressure control system in which the number of constituting parts, such as a pressure control valve, etc., can be reduced and which can securely control pressure. SOLUTION: A pressure controller 7 is equipped in the water fire fighting equipment 1 and constituted of a electric valve 71, a pressure sensor 72, and a pressure control panel 73. The electric valve 71 is installed in the main piping 36 and can control the water flow rate flowing in the main piping 36. The pressure sensor 72 is placed in the main piping 36 in the secondary side and can detect the pressure at the place. The pressure control panel 73 stores values of controlled pressure for piping at respective water discharging section. On a fire, the stored value of controlled pressure corresponding to a water discharging section obtained from a water flow detector 40 is read out to control open/ close of the electric valve 71 based on the read out controlled pressure and the detected pressure from the pressure sensor 72.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for reliably controlling the water discharge pressure of a head in a water discharge section pipe of a water-based fire extinguishing system without installing a pressure regulating valve or the like for each discharge section pipe or each discharge type head. The present invention relates to an adjustable pressure control device.

[0002]

2. Description of the Related Art In general, a water-based fire extinguishing system of this type is provided with a plurality of pipes for water discharge sections connected to a main pipe, and provided with flowing water detecting means for each of the pipes for water discharge sections. It is equipment that can be pressurized by a pressure water supply device (drive motor / pump) and can be supplied to the piping for the operating water discharge section. Sprinkler equipment using a water discharge head, open type sprinkler equipment, foam fire extinguishing equipment, etc. are known. I have.

[0003] Among such water-based fire extinguishing facilities, in open-type sprinkler facilities and foam fire extinguishing facilities, the upper limit of the water discharge pressure from the head is strictly determined. Therefore, for example, there is a disadvantage that the upper limit of the water discharge pressure of the head is easily exceeded depending on the installation conditions of the pressurized water supply device including the driving motor and the pump and the head. In order to prevent such inconvenience, a pressure regulating valve is provided for each water discharge section piping, and pressure control is performed by using this pressure regulating valve so as not to exceed the upper limit of the water discharge pressure (first example). Prior art).

[0004] In water-based fire extinguishing equipment, sprinkler equipment using a water discharge type head or the like has a strictly defined water discharge area. Therefore, in order to surely satisfy the range of the water discharge area, the water discharge pressure range of the water discharge type head has to be set very narrow. Conventionally, in order to maintain this water discharge pressure range, a constant flow rate valve is arranged for each head or each water discharge section pipe, and the pressure is controlled by this valve (second prior art).

[0005]

However, in the above-mentioned first prior art, since it is necessary to provide a pressure regulating valve for each pipe for the water discharge section, the number of pressure regulating valves increases as the number of sections increases. In addition to the necessity, the number of other parts is increased, and the number of construction days and construction costs are also increased, resulting in increased costs.

In the second prior art, the constant flow valve is manufactured based on the water discharge flow rate of the head.
It cannot be manufactured until the calculation of the total amount of water discharged from one water discharge section piping is completed, and it takes many days to manufacture a constant flow valve, and it also requires many construction days and construction costs, resulting in increased costs. was there.

The present invention has been made in view of the above-mentioned drawbacks, and has a reduced number of components such as a pressure regulating valve.
An object of the present invention is to provide a pressure adjustment control device capable of reliably performing pressure control.

[0008]

According to a first aspect of the present invention, there is provided a pressure adjusting control device, wherein a plurality of water discharge section pipes are communicated with a main pipe, and water in a water source is supplied in a fire. In a water-based fire extinguishing system that can be supplied to a working water discharge section pipe by being pressurized by a pressurized water supply device, an electric valve provided in the main pipe and capable of adjusting an amount of water flowing through the main pipe, and a main pipe on a secondary side from the electric valve. A pressure sensor that can be disposed to detect the pressure at the position, a water discharge section determining means for determining a water discharge section, and a control pressure value for each water discharge section pipe are stored, and obtained from the water discharge section determining means in the event of a fire. Read out the storage control pressure value corresponding to the water discharge section,
Pressure control means for controlling the opening and closing of the electric valve based on the read control pressure value and the pressure detected by the pressure sensor is provided.

According to the second aspect of the present invention, a plurality of water discharge section pipes are communicated with the main pipe, and a water flow detecting means is provided for each of the water discharge section pipes. In a water-based fire extinguishing system capable of supplying pressurized water to a working water discharge section pipe by a device, an electric valve provided in the main pipe and capable of adjusting an amount of water flowing through the main pipe, and disposed in a main pipe on a secondary side of the electric valve. A pressure sensor capable of detecting the pressure at the position and a control pressure value for each water discharge section pipe are stored, and in the event of a fire, a stored control pressure value corresponding to the water discharge section obtained from the flowing water detection means is read out and read. Pressure control means for controlling opening and closing of the electric valve based on a control pressure value and a pressure detected by the pressure sensor is provided.

According to the third aspect of the present invention, the first or second aspect is provided.
In the above, the pressure control means reads a control pressure value corresponding to the water discharge section obtained from the flowing water detection means, and a difference between the read control pressure value and a detection pressure from the pressure sensor is divided into multiple stages. According to another feature of the present invention, there is provided means for controlling the opening and closing of the motor-operated valve in a control pattern corresponding to the control pattern determination range depending on whether the control pattern has reached any of the control pattern determination ranges.

According to the fourth aspect of the present invention, the first or second aspect is provided.
In the above, the electric valve includes a valve body that adjusts a water amount, a driving unit that opens and closes the valve body, and a valve opening degree detection unit that sets an opening degree of the valve body to an opening degree detection signal. The control means reads a control pressure value corresponding to the water discharge section obtained from the flowing water detection means, and a difference between the read control pressure value and the detected pressure from the pressure sensor is a control pattern determination range divided into multiple stages. Control means for controlling the opening and closing of the motor-operated valve according to a control pattern corresponding to the control pattern determination range depending on whether the motor has reached the minimum opening degree. When the current valve opening reaches the minimum opening from the opening detection signal from the opening detection signal from the opening detection means, the minimum opening control means that does not control the servo motor of the electric valve in the closing direction is provided. To be

According to the fifth aspect of the present invention,
(3) or (4), wherein the pressure sensor is arranged at a predetermined distance or more that does not affect the pressure detection.

According to the sixth aspect of the present invention, the first, second,
3 or 4, wherein the pressure sensor is arranged at a distance of at least three times the inner diameter of the main pipe from the electric valve.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. [First Embodiment] FIGS. 1 to 6 are views for explaining a pressure adjustment control device according to a first embodiment of the present invention.

FIG. 1 is a system diagram showing a water-based fire extinguishing system equipped with a pressure adjustment control device according to the first embodiment.
In FIG. 1, the water-based fire extinguishing equipment 1 is roughly divided into a water distribution system 3 and a fire extinguishing signal control system 5. Further, the water-based fire extinguishing equipment 1 is equipped with a pressure adjustment control device 7 according to the first embodiment of the present invention. The pressure adjustment control device 7 is roughly divided into an electric valve 71, a pressure sensor 72,
A pressure control panel 73 is provided. The water distribution system 3 includes a water tank 31, a suction pipe 32, a pump 33, and a check valve 34.
, A main stop valve 35, a main pipe 36, and a plurality of water discharge section pipes 37, 37,.

In the water distribution system 3 described above, the suction pipe 32
Communicates the suction port of the pump 33 and the water tank 31. The discharge port of the pump 33 is communicated with a plurality of discharge pipes 37, 37,... Through a main pipe 36 installed in the order of a check valve 34, a main stop valve 35, and an electric valve 71. The water tank 31 stores fire extinguishing water. The pump 33 can pump water from the water tank 31 through the suction pipe 32. The water discharged from the pump 33 is prevented from flowing backward by the main stop valve 35.

Each of the discharge pipes 37 has a simultaneous release valve 38, a solenoid valve 39, a flowing water detector 40, and heads 41, 41,. The primary side of the simultaneous release valve 38 and the primary side of the solenoid valve 39 are connected to the main pipe 36. The secondary side of the solenoid valve 39 communicates with the control port of the simultaneous opening valve 38. The secondary side of the simultaneous release valve 38 is communicated with one or a plurality of heads 41, 41,.
The simultaneous release valve 38 is always closed, and the water discharge section piping 3
7 is opened when selected. The solenoid valve 39 controls opening of the simultaneous opening valve 38. The running water detector 40 can detect running water flowing to the head 41. One or more water discharge section pipes 37 having such a configuration are provided. Therefore, there is n (arbitrary numerical value) in the water discharge pipe 37 selected by fire or manually.
Will be described.

The fire extinguishing signal control system 5 includes a fire detector 51, a manual operation panel 52, a pump control panel 53, and a fire extinguishing equipment control panel 55. Fire extinguisher control panel 55
Includes a running water detector 40, a fire detector 51, and a manual operation panel 5.
2 is input. The fire extinguishing equipment control panel 55 is provided when a fire is detected by a detection signal from the fire detector 51 or when the manual operation panel 5
When a manual operation is performed via the control unit 2, a start signal is sent to the pump control panel 53 to drive the pump 33, and the solenoid valve 39 in the water discharge section is controlled to be opened, so that the simultaneous opening valve 38 can be controlled to be opened. ing. Similarly, when the fire extinguishing equipment control panel 55 detects a fire based on the detection signal from the fire detector 51 or is manually operated through the manual operation panel 52, the detection signal from the flowing water detector 40 is output. Thus, the working water discharge section is determined, and information on the working water discharge section can be notified to the pressure control panel 73 of the pressure adjustment control device 7.

Next, the details of the pressure adjustment control device 7 will be described. The motor-operated valve 71 is connected to the main stop valve 35 of the main pipe 36.
And the amount of water flowing through the main pipe 36 can be adjusted.

The pressure sensor 72 is provided with an electric valve 71.
It is arranged in the main pipe 36 on the secondary side, so that the pressure at the position where the main pipe 36 is arranged can be detected, converted into an electric signal and output.

Although not shown, the pressure control panel 73 includes a plurality of analog input units, a plurality of digital input units, a control output unit for controlling a motor-operated valve and the like, and a one-chip microprocessing unit (MPU). It comprises a main control unit, a pressure setting unit, other operation units, a display unit, and a power supply unit. The main control unit, which is the center of the pressure control panel 73, includes a control unit 73a that performs arithmetic processing and control processing to drive the electric valve, and a set pressure value set for each water discharge section and the pressure control. And a storage unit 73b for storing the program. More specifically, the storage unit 73b stores, via a pressure setting unit, a control pressure value Pd1, for each of the water discharge section pipes 37, 37,.
Pd2,... Are stored. Control pressure values Pd1, Pd
Are different depending on factors such as the number of water jet heads 41, 41,... Provided in the water discharge section pipe 37, the length, position, and height difference of the water discharge section pipe 37. Therefore, the control pressure values Pd1, Pd2,... May be calculated in advance for each water discharge section in consideration of these factors.

In the event of a fire or manual operation, the control unit 73a of the pressure control panel 73 executes a program for performing the pressure control, and the flow detector 4 in the fire discharge area.
The control pressure value Pdn corresponding to the water discharge section pipe 37n obtained from 0 is read from the storage unit 73b, and the read control pressure value Pdn and the detection pressure P from the pressure sensor 72 are read out.
The opening and closing control of the motor-operated valve 71 is performed based on s. This opening / closing control is performed by the control unit 7 described above.
3b stores the control pressure value Pdn corresponding to the water discharge section obtained from the running water detector 40n of the working water discharge section 37n in the storage section 73a.
And a difference E between the read control pressure value Pdn and the detected pressure Ps from the pressure sensor 72 reaches one of the control pattern determination ranges 100 (see FIG. 6) divided into multiple stages. , The control patterns CPa, CPb,
.. Perform multi-stage control for controlling the opening and closing of the electric valve 71.

FIG. 2 is a schematic view of a motor-operated valve used in the pressure adjustment control device. In FIG. 2, the electric valve 71
Includes a butterfly valve section 76, a valve drive section 77, and a valve opening display section 78. The butterfly valve portion 76 includes a valve body 80, a valve rod 81, a valve body 82, and a seat ring 83.
The amount of water can be adjusted by rotating the valve body 82 about the valve rod 81, and this is always fully open. Although not shown, the valve drive unit 77 includes a servomotor that drives the butterfly valve 76 to open and close, a speed reducer that transmits the rotation of the servomotor to the valve rod 81, and a potentiometer PM that detects the opening.

FIG. 3 is a circuit diagram showing an electric circuit of the motor-operated valve. One end of the servo motor 85 is connected to a terminal T2 via a thermal protector 86. Terminal T2 is connected to terminal T via heater 87 for thermal protector 86.
1 connected. The positive rotation terminal of the servo motor 85 is connected to one stator of the limit switch 88. The other stator of the limit switch 88 is connected to the terminal T5. The mover of the limit switch 88 is connected to the terminal T3. The reverse rotation terminal of the servomotor 85 is connected to one stator of the limit switch 89. The other stator of the limit switch 89 is a terminal T6
It is connected to the. The mover of the limit switch 89 is connected to the terminal T4. Note that opening and closing can be controlled by applying one of the control voltages to the terminal T2 and the other of the control voltages to the terminal T3 or the terminal T4.

The fixed electrode of the potentiometer PM is connected to terminals T17 and T19, and the movable electrode of the potentiometer PM is connected to terminal T18. This potentiometer PM can output the opening degree of the butterfly valve section 76 as a change in resistance value. In addition,
Limit switches 91 and 92 for detecting full opening and full closing of the butterfly valve section 76 are provided. The limit switch 91 is connected to terminals T11 to T13, and the limit switch 92 is connected to terminals T14 to T16, respectively. The terminal T20 is connected to a ground electrode. These terminals T1
To T6 and terminals T11 to T20 are connected to the pressure control panel 73.

FIG. 4 is a view for explaining a mounting position of a pressure sensor used in the pressure adjustment control device.
In FIG. 4, the pressure sensor 72 is disposed in the main pipe 36 on the secondary side (downstream side) of the electric valve 71. The pressure sensor 72 is disposed on the secondary side (downstream side) from the center position O of the motor-operated valve 71 with a distance L (≧ 3D) that is three times or more the inner diameter D of the main pipe 36. The reason for this arrangement is that if it is arranged on the secondary side immediately adjacent to the motor-operated valve 71, accurate pressure cannot be detected.

The operation of the pressure adjustment control device constructed as described above will be described with reference to FIGS. 1 to 4 and FIGS. Here, FIG. 5 is a flowchart for explaining the operation of the pressure adjustment control device. FIG. 6 is a diagram for explaining multi-stage control of the electric valve by the pressure adjustment control device.

[Operation at the time of fire occurrence] First, the fire extinguishing operation at the time of fire occurrence will be described. When the fire detector 51 detects a fire, a fire signal is input from the fire detector 51 to the fire extinguisher control panel 55. In this case, the fire signal input to the fire extinguishing equipment control panel 55 may receive a signaling signal from a fire receiver.

When a fire signal from the fire detector 51, a notification signal from the fire receiver, or a manual signal from the manual operation panel 52 is input, the fire extinguishing equipment control panel 55 discharges water based on the signal. The solenoid valve 39n of the sectioning pipe 37n is controlled to open, and the simultaneous release valve 38n is opened. Further, the fire extinguishing equipment control panel 55 simultaneously controls the opening of the solenoid valve 39n,
A start signal is sent to the pump control panel 53.

The pump control panel 53 which has received the start signal
Starts the pump 33 and supplies the water in the water tank 31 to the main pipe 36.
And water is supplied to the water discharge section piping 37n. Thereby, water discharge is started from the heads 41, 41,... Of the water discharge section piping 37n.

When the simultaneous release valve 38 of the water discharge section piping 37n is opened and water discharge is started from the heads 41, 41,.
This running water is detected by the running water detector 40n, and the detection signal is sent to the fire extinguishing equipment control panel 55. Fire extinguisher control panel 55
Specifies the water discharge section piping 37n from the detection signal and sends the information to the pressure control panel 73 as a pressure control signal.

Then, the control section 73a of the pressure control panel 73 executes a program for performing the pressure control (S
201).

In the pressure control panel 73a, the control pressure value P corresponding to the water discharge section piping 37n is determined based on the information on the fire discharge area.
dn is read from the storage unit 73b, and a difference between the read control pressure value Pdn and the detected pressure Ps from the pressure sensor 72 is calculated (S202).

Next, the control unit 73b determines that the difference E is
The control pattern CP corresponding to the control pattern determination range 100 depends on whether the control pattern has reached any of the control pattern determination ranges 100 (see FIG. 6) divided into multiple stages.
A, CPb,... perform multi-stage opening / closing control of the electric valve 71.

To further explain this point, in the control pattern determination range 100 shown in FIG.
X is the allowable range of the adjustment pressure value, from + X to + Y (from -X to-
Y) is the pressure range of pressure adjustment control phase 3, from + Y to +
Z (-Y to -Z) indicates the pressure range of the pressure adjustment control phase 2 and + Z or more (-Z or less) indicates the pressure range of the pressure adjustment control phase 1.

The control pattern determination range 100 is as follows. (i) When the difference E ≧ + Z: A control pattern CPac for performing the closing control continuously. (ii) When + Z> difference E ≧ + Y T1 [sec] is closed and T
This is a control pattern CPbc in which a weight (stopping the movement of the valve element) is set for 2 [seconds]. (iii) In the case of + Y> difference E> + X: T3 [second] closed control,
This is a control pattern CPcc in which a weight (movement of the valve element is stopped) is provided for T4 [seconds]. (iv) When + X> difference E ≧ −X: Control pattern CPd not to be controlled. (v) When −X> difference E ≧ −Y: T3 [sec] is opened and T
This is a control pattern CPco in which a weight (movement of the valve element is stopped) is set for 4 [seconds]. (vi) When −Y> difference E ≧ −Z: T1 [sec] is opened and T
This is a control pattern CPbo that waits for 2 [seconds]. (vii) In the case of difference E <-Z: Control pattern CPao for performing open control continuously. Here, T1> T3, T2 ≦ T4 and T1, T3 <T
2, T4.

The control pattern determination range 100 is stored in the storage 73b. Therefore, the control unit 73a
Is determined when the difference E satisfies the difference E ≧ + Z in the (i) term of the control pattern determination range 100 (S203; Y
ES), the motor-operated valve 71 is controlled to be continuously closed by the control pattern CPac (S204).

When the control unit 73a determines that the difference E is in the range of + Z> difference E ≧ + Y in the item (ii) of the control pattern determination range 100 (S203; NO, S205;
YES), the control is performed to close the motor-operated valve 71 for T1 [seconds] and to control the weight for T2 [seconds] using the control pattern CPbc (S206).

When the control unit 73a determines that the difference E is in the range of + Y> difference E ≧ + X in the item (iii) of the control pattern determination range 100 (S203; NO, S20
5; NO, S207; YES), control pattern CPcc
Then, the motor-operated valve 71 is controlled to be closed for T3 [seconds].
Control is performed to wait for [sec] (S208).

When the control unit 73a determines that the difference E satisfies the range of + X> difference E ≧ −X in the item (iv) of the control pattern determination range 100 (S203; NO, S205;
NO, S207; NO, S209; YES), the control of opening and closing the electric valve 71 by the control pattern CPd is stopped (S).
210).

When the control section 73a determines that the difference E is in the range of -X> difference E ≧ -Y in the item (v) of the control pattern determination range 100 (S203; NO, S205;
NO, S207; NO, S209; NO, S211; Y
ES), the electric valve 71 is controlled to be opened for T3 [seconds] by the control pattern CPco, and the weight is controlled to be kept for T4 [seconds] (S212).

When the control unit 73a determines that the difference E is in the range of -Y> difference E ≧ -Z in the item (vi) of the control pattern determination range 100 (S203; NO, S205;
NO, S207; NO, S209; NO, S211; N
O, S213; YES), control to open the electric valve 71 for T1 [seconds] and control to wait for T2 [seconds] by the control pattern CPbo (S214).

When the controller 73a determines that the difference E is within the range of the difference E <-Z in the (vii) term of the control pattern determination range 100 (S203; NO, S205; N)
O, S207; NO, S209; NO, S211; N
O, S213; NO), the electric valve 71 is continuously controlled to be opened with the control pattern CPao (S215).

Then, if there is a detection signal of the flowing water detector 40 of the pipe for the water discharge area (S216; N)
O), and return to step S202 again.

Further, when the detection signal of the flowing water detector 40 of the water discharge area pipe disappears (S2).
16; YES), the electric valve 71 is fully opened (S21).
7), the multi-stage pressure control ends (S218).

By performing the step control in this manner,
The pressure difference can be quickly brought into a predetermined range. The reason for performing such step control is that a rapid pressure change occurs in continuous opening / closing control, and therefore, it is necessary to reduce the degree of opening of the valve body in order to keep it within a predetermined range. Therefore, the control accuracy must be increased. In addition, when the opening degree of the electric valve 71 is small, the movement of the valve body is small, so that it takes time to converge the pressure difference within a predetermined range. Therefore, by performing the above-described step control, the time required for the pressure difference to converge within a predetermined range can be reduced, and a commonly used control device can be used.

According to such a pressure adjustment control device, there are the following advantages. (A) Only the pressure adjustment control device 7 can adjust the different water discharge pressures of a large number of water discharge section pipings 37, 37,. (B) The pressure sensor 72 installed on the secondary side of the motor-operated valve 71 as compared with the method of controlling the pressure only by the opening degree information of the motor-operated valve 71
Therefore, even if the capacity of the pump 33 changes, it is possible to control the water discharge pressure accurately. (C) Since only the pressure adjustment control device 7 is required, many constant flow valves and pressure adjustment valves are not required.

Next, a second embodiment of the present invention will be described. The control unit 73a of the pressure control panel 73 of the pressure adjustment control device 7 according to the second embodiment
In addition to the other-stage control of the embodiment, the following is added.

First, the storage unit 73b of the pressure adjustment controller 7
Then, the minimum opening of the electric valve 71 is determined and stored in advance. The resistance value of the potentiometer PM, which is a valve opening detecting means of the electric valve 71, can be input to the control unit 73a.

The control unit 73a executes the minimum opening control program to realize the minimum opening control means. When the minimum opening control means in the control unit 73a determines that the current valve opening has reached the minimum opening based on the resistance value of the potentiometer PM which is the valve opening detection means of the electric valve 71. In addition, the servomotor 85 of the electric valve 71 is not controlled in the closing direction.

For example, even when multi-step control is performed, the control is closed depending on the pressure difference, and the opening of the valve body of the motor-operated valve 71 may be reduced. To prevent water shortage.

Further, it is possible to prevent the valve from being controlled to close in the event that the pressure sensor 72 breaks down.

According to such a second embodiment, the system configuration can be made fail-safe.

In each of the above embodiments, a sprinkler system using a water discharge type head has been described, but the present invention can be applied to other water-based fire extinguishing systems.

In each of the above embodiments, the water discharge section is specified by the water flow detector 40. However, the present invention is not limited to this. For example, a pressure sensor may be provided in place of the water flow detector 40 and the pressure sensor may be used. It may be a detection signal, a drive signal of the solenoid valve 39, or a detection signal from a fire alarm.

[0056]

As described above, according to the present invention, the following effects can be obtained. (A) The different water discharge pressures of a large number of water discharge section pipes can be adjusted only by the pressure adjustment control device. (B) Compared to the method of controlling the pressure only with the opening information of the motor-operated valve, control is performed by the pressure detected by the pressure sensor installed on the secondary side of the motor-operated valve. Can be controlled to pressure. (C) Since only a pressure adjustment control device is required, a large number of constant flow valves and pressure adjustment valves are not required, and the number of parts is reduced.
The construction period can be shortened, and the cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a system diagram showing a water-based fire extinguishing system equipped with a pressure adjustment control device according to a first embodiment of the present invention.

FIG. 2 is a schematic diagram of a motor-operated valve used in the pressure adjustment control device.

FIG. 3 is a circuit diagram showing an electric circuit of the motor-operated valve.

FIG. 4 is a diagram for explaining a mounting position of a pressure sensor used in the pressure adjustment control device.

FIG. 5 is a flowchart for explaining the operation of the pressure adjustment control device.

FIG. 6 is a view for explaining multi-stage control of the electric valve by the pressure adjustment control device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Water system fire extinguishing equipment 3 Water distribution system 5 Fire extinguishing signal control system 7 Pressure regulation control device 31 Water tank 33 Pump 36 Main piping 37 Water discharge piping 38 Simultaneous opening valve 39 Solenoid valve 40 Flowing water detector 51 Fire detector 52 Manual operation panel 53 Pump Control panel 55 Fire extinguishing equipment control panel 71 Electric valve 72 Pressure sensor 73 Pressure control panel (pressure control means) 73a Control unit 73b Storage unit

Claims (6)

[Claims] 1. A water system fire extinguishing system in which a plurality of water discharge section pipes are communicated with a main pipe and in which a water source can be pressurized by a pressurized water supply device and supplied to a working water discharge section pipe in a fire. An electric valve capable of adjusting the amount of water flowing through the main pipe, a pressure sensor disposed on the main pipe on the secondary side of the electric valve and capable of detecting the pressure at the position, a water discharge section determining means for determining a water discharge section, A control pressure value for each section piping is stored, and in the event of a fire, a stored control pressure value corresponding to the water discharge section obtained from the water discharge section determination means is read out, and the read control pressure value and the detected pressure from the pressure sensor are read out. Pressure control means for controlling the opening and closing of the electric valve based on the pressure control. 2. A plurality of water discharge section pipes are communicated with a main pipe, and a running water detecting means is provided for each of the water discharge section pipes. In a water-based fire extinguishing system that can supply to a water discharge section pipe, an electric valve provided in the main pipe and capable of adjusting an amount of water flowing in the main pipe, and disposed in a main pipe on a secondary side of the electric valve to detect a pressure at the position. A pressure sensor and a control pressure value for each water discharge section pipe are stored, and in the event of a fire, a stored control pressure value corresponding to the water discharge section obtained from the flowing water detection means is read, and the read control pressure value and the pressure are stored. Pressure control means for controlling opening and closing of the electric valve based on pressure detected by a sensor. 3. The pressure control means reads a control pressure value corresponding to a water discharge section obtained from the flowing water detection means, and a difference between the read control pressure value and a detection pressure from a pressure sensor is multi-staged. 2. A device according to claim 1, further comprising means for controlling opening and closing of the electric valve with a control pattern corresponding to the control pattern determination range depending on whether the control pattern has reached one of the divided control pattern determination ranges.
Or the pressure adjustment control device according to 2. 4. The valve according to claim 1, wherein the motor-operated valve includes a valve body for adjusting a water amount.
A drive unit for opening and closing the valve body; and a valve opening detection unit for setting the opening degree of the valve body to an opening detection signal. The pressure control unit corresponds to a water discharge section obtained from the flowing water detection unit. The read control pressure value is read, and depending on whether the difference between the read control pressure value and the detected pressure from the pressure sensor reaches one of the control pattern determination ranges divided into multiple stages, the control pattern determination range Control means for controlling the opening and closing of the motor-operated valve in accordance with a control pattern corresponding to the control valve, a minimum opening is determined in advance, and the current valve opening is determined from an opening detection signal from the valve opening detecting means of the motor-operated valve. The pressure adjustment control device according to claim 1 or 2, further comprising a minimum opening control unit that does not control the driving direction of the electric valve in the closing direction when the minimum opening is reached. 5. The pressure adjustment control device according to claim 1, wherein the pressure sensors are arranged apart from each other by a predetermined distance that does not affect pressure detection. 6. The pressure adjustment control device according to claim 1, wherein the pressure sensor is arranged at a distance of at least three times the inner diameter of the main pipe from the motor-operated valve.