JP3749782B2 - Control equipment for fixed fire extinguishing equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a control device and a control method for a fixed fire-extinguishing facility that discharges water for fire extinguishing from a water discharge head installed in a protection section in the event of a fire.
[0002]
[Prior art]
Conventionally, in a sprinkler fire extinguishing equipment known as a fixed fire extinguishing equipment, fire extinguishing water supplied under pressure from a sprinkler head installed in a protection zone is sprayed in the event of a fire, and the fire is extinguished by the cooling effect of the fire source.
In addition, a fine spray fire extinguishing system is known as a fixed fire extinguishing system in a protection area where it is desired to avoid water damage such as a computer room. The fire is extinguished by the cooling action when the sprayed droplets are evaporated from the fire source and the suffocation action by covering the fire source with the generated steam.
[0003]
[Problems to be solved by the invention]
However, in sprinkler fire extinguishing equipment that extinguishes fire by spraying water for fire extinguishing, and fine spray fire extinguishing equipment that extinguishes fire by releasing fine spray, water-based fixed fire extinguishing equipment that extinguishes mainly by cooling effect, while extinguishing surely, It is desirable to minimize water loss.
[0004]
For this reason, for example, it is conceivable to install a flame sensor in the protective compartment, and stop the water discharge by confirming the fire extinguishing with the flame sensor during the water discharge. However, in the water discharge, the heat from the fire source does not reach the flame sensor, and there is a risk that the fire extinguishing judgment may not be performed normally. Similarly, when an optical sensor is used for fire extinguishing judgment, it is conceivable that a fire cannot be detected optically due to fog due to water discharge or water vapor evaporated from a fire source.
[0005]
In order to solve such a problem, a method has been proposed in which water discharge is interrupted at regular intervals, and a fire extinguishing judgment is made based on a detection signal from a sensor while water discharge is interrupted (Japanese Patent Laid-Open No. 4-129574).
However, with this method, water discharge is interrupted for a certain period of time regardless of the size of the fire, so if the scale of the fire is large, the fire will expand during the interruption, reducing the fire extinguishing performance. There is a risk.
[0006]
The present invention has been made in view of such problems, and provides a control device for a fixed fire extinguishing facility that can effectively extinguish without reducing fire extinguishing performance even if water discharge is interrupted and fire extinguishing is judged by a sensor. The purpose is to do.
[0007]
In order to achieve this object, the present invention is configured as follows. First, the present invention is directed to a control device for a fixed fire-extinguishing facility that discharges water for fire extinguishing in the event of a fire from a water discharge head installed in a protection section.
As a control device for such a fixed fire-extinguishing equipment, the present invention provides a fire scale determination unit for determining the scale of a fire determined based on a detection signal of a sensor installed in a protective section, and a fire scale determined by a fire scale determination unit. The water discharge time is determined after the water discharge head is discharged from the water discharge head for the water discharge time determined by the water discharge time determination unit, and the fire scale determination unit is caused to determine the fire scale in this interrupted state. An intermittent water discharge control unit that repeats the process of resuming water discharge after obtaining a new water discharge time from the water discharge time determining unit is provided, and the water discharge time determining unit determines the water discharge time to become longer according to the expansion of the fire scale. In addition, the water discharge interruption time is set to a predetermined fixed time .
The fixed fire-extinguishing equipment to which the present invention is directed is a fine-spraying fire-extinguishing equipment in which a spray head that discharges a fine spray is installed in a protective compartment via a control valve that is controlled to be opened and closed by an intermittent water discharge controller.
[0008]
Further, the present invention provides a fire scale determination unit that determines the scale of a fire determined based on a detection signal of a sensor installed in a protective compartment, and a water discharge time that determines a water discharge time according to the fire scale determined by the fire scale determination unit. The water discharge is interrupted after discharging water from the water discharge head for the water discharge time determined by the determination unit and the water discharge time determination unit, and in this suspended state, the fire scale determination unit determines the fire scale and a new water discharge time from the water discharge time determination unit And an intermittent water discharge control unit that repeats the process of restarting the water discharge, and the water discharge time determination unit determines the water discharge time so as to become longer according to the increase in the fire scale, and according to the increase in the fire scale. the interruption time of water discharge is determined to be shorter, the fixed firefighting equipment, atomization extinguishing set installed in protective compartment via a control valve of the spray head which emits atomized-off controlled by the intermittent water discharge control unit And characterized in that.
[0009]
According to such a control apparatus for fixed fire extinguishing equipment of the present invention, since the water discharge time is determined based on the scale of the fire at that time, even if the water discharge is interrupted, it has been commensurate with the scale of the fire so far. Sufficient water discharge has been performed, and it is possible to minimize the deterioration of the fire extinguishing effect due to the interruption of water discharge for fire extinguishing judgment by the sensor. Can be reduced.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is an explanatory diagram of a sprinkler fire extinguishing equipment to which a control device and a control method for a fixed fire extinguishing equipment of the present invention are applied.
In FIG. 1, an open-type sprinkler head 2 is installed for a protective section 1 in a building, and the sprinkler head 2 is connected to a branch pipe 4 in a sprinkler fire extinguishing equipment through a motor-operated valve 5. A flame sensor 3 is installed in the protection section 1 to detect thermal energy from the flame of the fire source F. The flame sensor 3 and the electric valve 5 are connected to the control panel 6. The control panel 6 is provided with a water discharge control unit 7 for realizing the water discharge control of the present invention.
[0012]
A fire extinguishing pump 20 and a motor 21 are installed as pump equipment in the sprinkler fire extinguishing equipment, and the motor 21 can be operated and stopped by the pump control panel 23. The suction side of the fire pump 20 is lowered to a water source water tank 24. A water supply main 25 is installed in the vertical direction of the building on the protruding side, and an elevated water tank installed on the roof or the like at the tip of the water supply main 25 28 is connected.
[0013]
For example, branch pipes 4 are drawn out from the water supply main pipe 25 for each floor, and one of them is taken out. An alarm valve 30 having a pressure switch 31 is provided at a branch portion of the branch pipe 4. ing. Further, a pressure tank 26 is branched and connected to the water supply main pipe 25, and the air in the tank is compressed by fire-filled water that has been pressurized and filled. A pressure switch 27 is provided to turn on at once.
[0014]
FIG. 2 is a functional block diagram as an embodiment of the water discharge control unit 7 provided in the control panel 6 of FIG. In the embodiment of the water discharge control unit 7 of FIG. 2, it is composed of a fire scale determination unit 8, a water discharge time determination unit 9, a water discharge time table 10, a water discharge time timer 11 a, an interruption time timer 11 b and an intermittent water discharge control unit 12. The
The fire scale determination unit 8 reads the detection signal of the fire source from the flame sensor 3, and sets the non-fire as 0, for example, according to the strength of the energy released from the fire source, and the fire scale 1, 2 as the fire expands , 3, 4, 5,... The water discharge time determination unit 9 determines the water discharge time according to the fire scale determined by the fire scale determination unit 8. In order to determine this water discharge time, in this embodiment, the water discharge time table 10 is prepared beforehand.
[0015]
FIG. 3 is an explanatory diagram of the water discharge time table 10 of FIG. 2, and the water discharge time is 0 seconds, 15 seconds, 30 seconds, 45 seconds corresponding to the fire scales 0, 1, 2, 3, 4, 5,. , 60 seconds, 90 seconds,... Are stored in advance. In the water discharge time table 10, the water discharge time is proportionally increased at a predetermined rate with the expansion of the fire scale. That is, if the fire scale is small, a short water discharge time is set, and if the fire scale is large, a long water discharge time is set.
[0016]
Referring to FIG. 2 again, the water discharge time corresponding to the fire scale determined by the water discharge time determination unit 9 is set in the water discharge time timer 11a. On the other hand, the interruption time timer 11b has a fixed interruption time fixed in this embodiment. The intermittent water discharge control unit 12 operates when the fire scale determination unit 8 receives the determination result of the fire occurrence based on the flame sensor 3, and opens the motor-operated valve 5 provided in the branch pipe 4 to protect the protection shown in FIG. Water for fire extinguishing is discharged from the sprinkler head 2 provided in the section 1.
[0017]
When the motor-operated valve 5 is thus opened and the fire-extinguishing water is discharged from the sprinkler head 2 in the protection section 1, the fire-extinguishing water flows into the branch pipe 4, and the pressure on the secondary side of the alarm valve 30 decreases, thereby causing the alarm valve 30. Is opened and the pressure detection switch 31 is turned on to output a detection signal to the control panel 6. The detection signal from the pressure switch 31 becomes a water discharge confirmation signal when the open sprinkler head 2 is discharged by opening control of the motor-operated valve 5.
[0018]
On the other hand, when a normal closed sprinkler head 18 provided in another system of the branch pipe 4 is activated by a fire and discharges water for extinguishing, the alarm valve 30 is activated to output when the pressure switch 31 is turned on. The detected signal is handled as a fire detection signal for the control panel 6.
The fire pump 20 is activated based on a pressure drop detection signal from a pressure switch 27 provided in the pressure tank 26. That is, when fire-extinguishing water is sprayed from the open-type sprinkler head 2 by opening the motor-operated valve 5, the pressure inside the water supply main pipe 25 is lowered, and the compressed pressure of the air contained in the pressure tank 26 is lowered accordingly. When the sensor 27 drops below the specified pressure, a pressure drop detection signal is output to the pump control panel 23, thereby starting the motor 21 and starting the operation of the fire extinguishing pump 20.
[0019]
Referring again to FIG. 2, the protection section 1 is activated by the fire pump 20 in the sprinkler fire extinguishing equipment when the intermittent water discharge control unit 12 opens the motor-operated valve 5 based on the fire occurrence detection signal from the fire scale determination unit 8. When the water discharge is started, the water discharge timer 11a is started at this time. The water discharge timer 11a is timed up when the water discharge time set according to the fire scale by the water discharge time determination unit 9 elapses, and the intermittent water discharge control unit 12 controls the motor-operated valve 5 to close when the water discharge time timer 11a expires. .
[0020]
When the motor-operated valve 5 is controlled to be closed, the intermittent water discharge control unit 12 notifies the fire scale determination unit 8 of the water discharge interruption. Based on this, the fire scale determination unit 8 reads the detection signal of the flame sensor 3 in the water discharge interruption state, determines the fire scale, outputs it to the water discharge time determination unit 9, and the water discharge time determination unit 9 receives a new response. The new water discharge time is set in the water discharge time timer 11a with reference to the water discharge time table 10 based on the determination result of the fire scale.
[0021]
The water discharge interruption time is monitored by starting the interruption time timer 11b when the closed control of the motor-operated valve 5 is completed. When it is determined that the interruption time fixed in the interruption time timer 11b has elapsed, the intermittent water discharge control unit 12 is electrically operated. The valve 5 is controlled to be opened, the water discharge time timer 11a is started, and the newly set water discharge time is monitored. Hereinafter, such a process is repeated until the fire source is completely extinguished and the fire scale becomes zero.
[0022]
FIG. 4 is a time chart of the processing operation by the water discharge control unit 7 of FIG. First, in step S1, the presence or absence of a fire is monitored. For example, it is determined that a fire has occurred when the detection signal of the flame sensor 3 provided in the protective section 1 is equal to or greater than a predetermined fire threshold. When it is determined that a fire has occurred, the process proceeds to step S2, and the output of the flame sensor 3 at this time is captured. In step S3, the fire scale determination unit 8 determines the fire scale, and based on this, the water discharge time determination unit 9 stores the water discharge time table 10. The water discharge time corresponding to the fire scale is determined with reference to the water discharge time timer 11a.
[0023]
Subsequently, in step S4, the intermittent water discharge controller 12 opens the motor-operated valve 5, starts the water discharge timer 11a, and monitors the passage of the water discharge time in step S5. When the elapse of the water discharge time is determined in step S5, the process proceeds to step S6, and the motor-operated valve 5 is closed and water discharge is interrupted. At the same time, the interruption time timer 11b is started, and it is checked in step S7 whether the water discharge interruption time has elapsed.
[0024]
Due to the interruption of the water discharge, the fire extinguishing water that has been discharged from the water discharge head 2 to the protection section 1 and the vapor generated by the evaporation from the fire source F are contained to some extent, and the flame sensor 3 can accurately detect the heat rays of the fire source F. It becomes. For this reason, when it returns to step S3 next and the detection signal of the flame sensor 3 is read, the condition of the fire source F at that time can be judged correctly.
[0025]
During the water discharge interruption, the presence or absence of the system stop command is checked in step S8, and if the elapse of the water discharge interruption time is determined in step S7 without the system stop command, the process returns to step S2, and again, The detection signal of the flame sensor 3 is captured, the fire scale is determined in step S3, a water discharge time is newly set, and the motor-operated valve 5 is controlled to be opened in step S4 over this water discharge time.
[0026]
As a result, water discharge for fire extinguishing is started again. When the water discharge time elapses in step S5, the motor-operated valve 5 is closed in step S6, and after a predetermined water discharge interruption time elapses in step S7, the process returns to step S2 again. The setting process of the fire scale and water discharge time by taking in the output is repeated.
When the intermittent water discharge control in steps S2 to S7 is repeated, the fire scale gradually decreases due to extinction of the fire source. When the fire scale in the water discharge time table 10 of FIG. As a result, intermittent water discharge control is stopped.
[0027]
In this state, when a system stop command is received by an operator or the like in step S8, a stop process such as stop of the fire pump 20 or closing lock of the motor operated valve 5 is performed in step S9, and then a series of processes is ended.
FIG. 5 is a functional block diagram of another embodiment of the water discharge control unit 7 provided in the control panel 6 of FIG. 1. In this embodiment, the water discharge time and the interruption time are changed according to the fire scale. It was made to let it be made to do.
[0028]
In FIG. 5, the water discharge control unit 7 includes a fire scale determination unit 8, a water discharge time determination unit 9, a water discharge time timer 11 a, an interruption time timer 11 b, and an intermittent water discharge control unit 12. These configurations are basically the same as those of the embodiment of FIG. 2, but in this embodiment, a water discharge time / interruption time table 13 is provided instead of the water discharge time table 10 of FIG.
[0029]
The water discharge time / interruption time table 13 sets the interruption time in addition to the same water discharge time as the table of FIG. 3 corresponding to the fire scales 0, 1, 2, 3, 4, 5,. ing. The interruption time is set so that the time is shortened according to the fire scale 1, 2, 3, 4, 5,. ing. That is, the interruption time is set to be long if the fire scale is small, and the interruption time is set to be short if the fire scale is large.
[0030]
In the water discharge time determination unit 9 of FIG. 5, the water discharge time / interruption time table 13 is referred to by the fire scale determined by the fire scale determination unit 8 and the water discharge time and the interrupt time corresponding to the fire scale are read out. And set in the water discharge time timer 11a and the interruption time timer 11b. Thus, the water discharge time by the water discharge time timer 11a and the interruption time by the interruption time timer 11b are set in a reversible relationship according to the fire scale.
[0031]
FIG. 7 is a flowchart of the control process of the embodiment for determining the water discharge time and the interruption time of FIG. 5. The first example of FIG. 4 except that the water discharge time and the interruption time are determined by determining the fire scale in step S3. This is the same as the flowchart of the embodiment.
Figure 8 is an explanatory diagram of the case where the control apparatus is applied to a fine spray extinguishing system of the present invention.
[0032]
In FIG. 8, a spray head 14 is installed in the protective section 1. The spray head 14 receives a pressurized supply of fire-extinguishing water in the event of a fire, and fires a fine spray having a particle size of several tens to several hundreds of μm. Release towards source F. A water supply pipe 36 from a fire extinguishing pump 32 is connected to the spray head 14 via a motor-operated valve 5, and a flame sensor 3 is installed in the protection section 1 to make a fire extinguishing judgment.
[0033]
The flame sensor 3 and the motor-operated valve 5 are connected to a control panel 15, and the control panel 15 is provided with a water discharge control unit 7. As in the case of the sprinkler fire extinguishing equipment of FIG. 1, the water discharge control unit 7 can also apply the functional blocks of the embodiment of FIG. 2 or the embodiment of FIG. In addition, for the water discharge time table 10 or the water discharge time / interruption time table 13 shown in FIG. 3 and FIG. 6, the water discharge time and the interruption time suitable for the fine spray fire extinguishing equipment are set according to the fire scale, but the fire scale is expanded. The point is that the water discharge time is lengthened according to the situation, and conversely the interruption time is shortened according to the expansion of the scale of the fire.
[0034]
The fire pump 32 is driven by a motor 33, and the motor 33 is activated when a fire is detected by the control panel 15. The suction pipe of the fire extinguishing pump 32 is lowered to the water source water tank 34, and a priming water tank 35 is provided on the protruding side of the fire extinguishing pump 32. Furthermore, an accumulator 37 is provided in the middle of the water supply pipe 36, and a decrease in the water discharge capacity due to a sudden decrease in the water supply pressure when the fine spray of fire-extinguishing water is discharged from the spray head 14 by opening control of the motor-operated valve 5 is caused in the accumulator 37. It is prevented by the pressure accumulation function.
[0035]
FIG. 9 is a time chart of the processing operation in the fine spray fire extinguishing equipment by the water discharge control unit 7 provided in the control panel 15 of FIG. First, when fire occurrence is determined by the detection signal from the flame sensor 3 in step S1, the fire pump 32 is activated by the motor 33 in step S2. Subsequently, in step S3, the output of the flame sensor 3 is fetched. In step S4, the fire scale is determined to determine the water discharge time. The motor-operated valve 5 is controlled to open. In step S5, the passage of the water discharge time is monitored.
[0036]
When the water discharge time set according to the fire scale has elapsed, the motor-operated valve 5 is controlled to be closed in step S7, and the discharge of the fine spray from the spray head 14 is interrupted. When the interruption of the fine spraying has elapsed for a predetermined time, the process returns to step S3 and the output of the flame sensor is captured again. At this time, due to the discontinuation of the spray, the fine spray sprayed from the spray head 14 to the protective section 1 and the vapor generated by the evaporation from the fire source F are accommodated to some extent, and the flame sensor 3 can accurately detect the heat ray of the fire source F. It becomes a state.
[0037]
For this reason, when the detection signal of the flame sensor 3 is read in step S3, the state of the fire source F at that time can be accurately determined. In step S4, the fire scale is determined and a water discharge time corresponding to the fire scale is newly determined. Then, the discharge of the fine spray from the spray head 14 by the opening control of the electric valve is started again. In the same manner, the determination of the fire scale and the setting of the water discharge time are repeated by the water discharge over the water discharge time according to the fire scale and the reading of the flame sensor 3 after the water discharge is interrupted. In addition, the fire scale can be reduced to 0, that is, the fire can be suppressed.
[0038]
Of course, if the fire scale is determined in step S4 in the flowchart of FIG. 4 to determine the water discharge time and interruption time, this is a process according to the embodiment of the water discharge control unit 7 of FIG.
In the above embodiment, the fire extinguishing judgment in the protection section 1 is performed by the flame sensor 3, but in addition to this, image processing by an ITV camera and other appropriate sensors can be used. Moreover, the water discharge time and interruption time according to the fire scale in the present invention are not limited to the numerical values of the above-described embodiment, and can be appropriately set as necessary.
[0039]
【The invention's effect】
As described above, according to the present invention, since the water discharge time from the head in the sprinkler fire extinguishing equipment or the fine spray fire extinguishing equipment is determined based on the scale of the fire at that time, the water discharge is determined by the sensor for the fire extinguishing judgment. Even if it is interrupted, sufficient water extinguishing is performed according to the scale of the fire with the previous water discharge, and the deterioration of the fire extinguishing effect due to the water discharge being interrupted by the sensor for fire extinguishing judgment can be minimized. Moreover, useless water discharge can be eliminated by the fire extinguishing judgment by the sensor, and water loss can be reduced.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram of an embodiment of the present invention for a sprinkler fire extinguishing facility. FIG. 2 is a functional block diagram of an embodiment of a water discharge control unit provided in the control panel of FIG. 1. FIG. FIG. 4 is an explanatory diagram of the table. FIG. 4 is a flowchart of the processing operation of the water discharge control unit of FIG. 2. FIG. 5 is a functional block diagram of another embodiment of the water discharge control unit provided in the control panel of FIG. Explanatory diagram of the water discharge time / interruption time table [FIG. 7] Flow chart of processing operation of the water discharge control unit in FIG. 5 [FIG. 8] An explanatory diagram of the embodiment of the present invention for the fine spray fire extinguishing equipment [FIG. Flowchart of processing operation of the water discharge control unit [Explanation of symbols]
1: Protective compartment 2: Sprinkler head (open type)
3: Flame sensor Branch pipe 5: Electric valve 6: Control panel 7: Water discharge control unit 8: Fire scale determination unit 9: Water discharge time determination unit 10: Water discharge time table 11a: Water discharge time timer 11b: Interruption time timer 12: Intermittent water discharge control unit 13: Water discharge time / interruption time table 14: Spray head 18: Closed sprinkler head 20, 32: Fire extinguishing pump 21, 33: Motor 23: Pump control panel 24, 34: Water source water tank 25: Water supply main 26: Pressure tanks 27, 31 : Pressure switch 28: Elevated water tank 30: Alarm valve 36: Water supply pipe 37: Accumulator

Claims (2)

In a control device for fixed fire extinguishing equipment that discharges water for fire extinguishing in the event of a fire from a water discharge head installed in a protected area.
A fire scale determination unit that determines the scale of a fire determined based on a detection signal of a sensor installed in a protective compartment;
A water discharge time determination unit for determining a water discharge time according to the fire scale determined by the fire scale determination unit;
The water discharge is interrupted after water discharge from the water discharge head for the water discharge time determined by the water discharge time determination unit, and the fire scale determination unit determines the fire scale in the interrupted state, and the water discharge time is determined from the water discharge time determination unit. An intermittent water discharge control unit that repeats the process of obtaining and restarting water discharge,
Provided,
The water discharge time determining unit determines the water discharge time so as to become longer according to the expansion of the fire scale, and sets the water discharge interruption time as a predetermined fixed time,
The fixed fire-extinguishing equipment is a fine fire-extinguishing equipment in which a spray head that discharges a fine spray is installed in a protective compartment through a control valve that is controlled to be opened and closed by the intermittent water discharge control unit. apparatus. In a control device for fixed fire extinguishing equipment that discharges water for fire extinguishing in the event of a fire from a water discharge head installed in a protected area.
A fire scale determination unit that determines the scale of a fire determined based on a detection signal of a sensor installed in a protective compartment;
A water discharge time determination unit for determining a water discharge time according to the fire scale determined by the fire scale determination unit;
The water discharge is interrupted after water discharge from the water discharge head for the water discharge time determined by the water discharge time determination unit, and the fire scale determination unit determines the fire scale in the interrupted state, and the water discharge time is determined from the water discharge time determination unit. An intermittent water discharge control unit that repeats the process of obtaining and restarting water discharge,
Provided,
The water discharge time determining unit determines the water discharge time to be longer according to the expansion of the fire scale, and determines the water discharge interruption time to be shorter according to the expansion of the fire scale ,
The fixed fire-extinguishing equipment is a fine fire-extinguishing equipment in which a spray head that emits a fine spray is installed in a protective section through a control valve that is controlled to be opened and closed by the intermittent water discharge control unit. Control device.

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