JP3608323B2 - Sprinkler fire extinguishing equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a sprinkler fire extinguishing equipment.
[0002]
[Prior art]
Conventional wet sprinkler fire extinguishing equipment is filled with water for fire extinguishing over the entire water supply piping, so if there is a cause other than a fire, for example, if the head collides with the sprinkler head, The water for fire extinguishing is discharged (hereinafter, the water discharge for fire extinguishing due to the sprinkler head breakage is referred to as “sprinkler head overburden”), which causes a problem of large water loss.
As a technique for preventing water loss due to such sprinkler head overburden, there is an invention of a wet pre-actuated water flow detection device described in Japanese Patent Publication No. 7-12382.
[0003]
The invention described in the publication discloses an open valve having a valve body for opening and closing a communication portion between a primary chamber to which water for fire extinguishing is fed and a secondary chamber to which a closed sprinkler head is connected via a pipe. And a pre-actuated running water detection device configured to maintain the closed valve in a state where pressure fluid is sealed in the pipe and the secondary chamber. The secondary chamber side is filled with liquid that flows out to the outside regardless of the primary chamber side when the sprinkler head has an abnormality at a lower pressure than the primary chamber.
[0004]
In the technique described in the above publication, the valve body is opened when the two conditions of the fire detection signal of the fire detector and the pressure reduction of the secondary chamber are satisfied, and the secondary chamber is opened from the primary chamber side. Fire water is supplied to the side, and when an abnormal situation such as breakage occurs in the sprinkler head, only the liquid on the secondary chamber side is allowed to flow out from the sprinkler head without opening the valve body. It is.
[0005]
[Problems to be solved by the invention]
However, in the conventional wet pre-acting water flow detection device configured as described above, the valve element opens when a failure occurs in a part having an electric circuit such as a fire detector or a control means. A situation where fire extinguishing is impossible is considered.
[0006]
The present invention has been made to solve such problems, and can immediately cope with the occurrence of a fire, and also can reduce water loss even when the sprinkler head is damaged and explodes, and can be applied to an electric system or the like. The object is to provide a sprinkler fire extinguishing facility that can reliably extinguish a fire even if there is a failure.
[0007]
[Means for Solving the Problems]
The sprinkler fire extinguishing equipment according to the present invention includes a closed sprinkler head attached to the front end side of a water supply pipe, a fire detector that is installed in a protection area equipped with the closed sprinkler head, and detects the fire. A water flow detecting means installed in the pipe for detecting the water flowing in the water supply pipe, and an open / close control valve that is provided in the water supply pipe and normally maintains a half-open state,
When the fire detector detects a fire, the open / close control valve is fully opened or opened to a predetermined opening degree, and when the water flow detection means detects the water flow without the fire detector detecting a fire, the opening / closing is performed. The control valve is closed.
[0008]
Further, the normal half-open state of the open / close control valve is set to a state where a regular water discharge amount required when one of the closed sprinkler heads is opened can be supplied.
[0009]
Further, when the flowing water detecting means detects flowing water in a state where the fire detector does not detect a fire, the open / close control valve is closed after a predetermined time has elapsed since the flowing water detecting means detected the flowing water. It is a thing.
[0010]
Further, when the flowing water detecting means detects flowing water, the open / close control valve is in a semi-closed state, and in this state, the open / close control valve is closed when a predetermined time has passed without detecting a fire. It is a thing.
[0011]
Further, a closed sprinkler head attached to the front end side of the water supply pipe, a fire detector for detecting a fire installed in a protection area where the closed sprinkler head is installed, and a water detector installed in the water supply pipe, Flow detection means for detecting flowing water in the water supply pipe, an open control valve that is provided in the water supply pipe and normally maintains a closed state, and is installed in parallel with the open control valve. An on-off control valve that maintains the state,
When the fire detector detects a fire, the open control valve is fully opened or opened to a predetermined opening degree, and when the water flow detection means detects the water flow without the fire detector detecting a fire, the opening / closing is performed. The control valve is closed.
[0012]
Further, the open / close control valve is made smaller than the open control valve, and the normal open state of the open / close control valve is set to a normal release required when one of the closed sprinkler heads is opened. It is set so that the amount of water can be sent.
[0013]
Further, when the flowing water detection device detects flowing water in a state where the fire detector does not detect a fire, the opening / closing control valve is closed after a predetermined time has elapsed since the flowing water detecting means detected the flowing water. It is a thing.
[0014]
Further, when the flowing water detecting means detects flowing water, the open / close control valve is set in a semi-closed state, and the open / close control valve is closed when a predetermined time elapses without the fire detector detecting a fire in this state. It is a thing.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Embodiment 1 FIG.
FIG. 1 is a system diagram of an embodiment of the present invention, showing facilities installed on the first and second floors as an example of a protected area of a building. In the drawing, A is the equipment on the first floor and B is the equipment on the second floor among the parts surrounded by the one-dot chain line. The facilities on the first floor, the facilities on the second floor, and the facilities on other floors (not shown) are basically the same. Therefore, the facilities on the first floor will be described below, and only different parts will be described later.
In the figure, 1 is attached to the distal end side of a secondary side pipe 2 as a water supply pipe, a plurality of closed sprinkler heads installed on the ceiling surface, etc., 3 is attached to the secondary side pipe 2 and is When the pressurized water in the side pipe 2 flows out from the closed sprinkler head 1, a water flow detection device as a water flow detecting means for detecting the flow and outputting a water flow signal, 4 is a secondary side pipe 2 and a primary side pipe described later. The opening / closing control valve 4 partitions the opening / closing control valve 4, and the opening / closing control valve 4 is normally maintained in a half-open state. Reference numeral 5 denotes a primary side pipe connected to the open / close control valve 4 at one end and the other end side to a water source water tank 7 via a check valve 15 and a fire pump 6 described later. A fire extinguishing pump 7 for feeding water to the head 1 is a water source water tank in which fire extinguishing water is stored.
[0016]
17 is a pressure air tank in which compressed air for pressurizing the inside of the primary side pipe 5 and the secondary side pipe 2 to a predetermined pressure is stored, and 19 is the pressure of the compressed air in the pressure air tank 17 lower than a predetermined value. It is a pressure switch that operates when
Further, 8 is a fire detector that is installed in a protected area where the closed sprinkler head 1 is installed, detects a fire and outputs a fire signal, 9 is a fire signal of the fire detector 8 and a water flow signal of the water flow detector 3. And a control panel that controls the opening / closing of the opening / closing control valve 4 based on the input signal. Further, the control panel 9 receives the signal from the pressure switch 19 and activates the fire pump 6.
[0017]
The second floor facility is different from the first floor facility in that the running water detection device 3 is installed on the fire pump 6 side of the open / close control valve 4 in the water supply pipe, that is, the primary side pipe 5. Same as the facilities on the first floor.
[0018]
FIG. 2 is a process flowchart of the control panel 9 in the first embodiment shown in FIG. Hereinafter, the processing of the control panel 9 will be described based on FIG. 2 and the operation of each component device shown in FIG. 1 will be described.
The control panel 9 determines whether or not a flowing water signal is input from the flowing water detection device 3 (S11), and when it is determined that the flowing water signal is input, the control valve 4 in the half-open state is closed (S12). ). At this time, since the opening / closing control valve 4 is closed from the half-open state, the valve-closing operation can be performed in a very short time compared to the case of closing from the fully-open state.
[0019]
Next, it is determined whether or not a fire signal is input from the fire detector 8 (S13). When it is determined that no fire signal is input, it is determined whether or not a preset abnormal time has elapsed (S14). ). The abnormal time is a time sufficient to determine that the generation of the water flow signal is due to the sprinkler head being overrun, for example, about 5 minutes. When it is determined that the abnormal time has elapsed, the control panel 9 outputs an abnormal signal and issues an alarm. If it is determined in S14 that the abnormal time has not elapsed, the presence or absence of a fire signal is determined again (S13), and this process is repeated until the abnormal time has elapsed.
The flow of S11 to S15 described above is processing when there is no fire signal in spite of the flow signal, that is, when the closed-type sprinkler head is expelled, etc. The water for fire extinguishing of the side pipe 5 is not sent to the secondary side pipe 2 and water loss can be suppressed.
[0020]
If it is determined in S11 that there is no running water signal, the presence or absence of a fire signal is further determined (S51). If it is determined in S51 that there is no fire signal, the process returns to S11 to determine whether there is a running water signal. This loop of S11 and S51 shows processing in a normal monitoring state.
If it is determined in S51 that there is a fire signal, the open / close control valve 4 is opened from the half-open state to the full open or a predetermined opening (S52). The predetermined opening degree is an opening degree that is not yet fully opened but is sufficient for the amount of water to be discharged from the closed sprinkler head 1 to flow. At this time, the open / close control valve 4 is opened from the half-open state to the full open or the predetermined opening degree, so that the opening operation can be performed in a very short time.
[0021]
Next, it is determined whether or not there is a water discharge stop command (S53), and if there is, the open / close control valve 4 is closed (S54). The water discharge stop command is a signal issued when a person who has confirmed the fire extinguishing when the fire is extinguished, for example, presses a push button switch for a water discharge stop command provided on the control panel 9. When it is determined in S53 that there is no water discharge stop command, the valve closing operation (S54) of the open / close control valve 4 is performed after waiting for the water discharge stop command.
[0022]
The flow from S11, S51 to S54 shows the operation of the control panel 9 when a fire occurs. Therefore, in this case, as described above, the open / close control valve 4 is fully opened or opened to a predetermined opening, so that the fire-extinguishing water in the primary side pipe 5 flows out and is discharged from the closed sprinkler head 1. . And the pressure of the pressure air tank 17 falls by the outflow of the fire-extinguishing water in the primary side piping 5, the pressure switch 19 is actuated, the fire-extinguishing pump 6 is started, and the fire-extinguishing water in the water source water tank 7 is pressurized and supplied. Fire fighting operation continues.
[0023]
If it is determined in S13 that there is a fire signal, the open / close control valve 4 is fully opened from the closed state or opened to a predetermined opening degree (S52), and thereafter the processes of S53 and S54 described above are performed. The processes of S11 to S13 to S54 are processes when a fire signal is detected after detecting a flowing water signal, that is, when a fire has occurred in the vicinity of the closed sprinkler head 1. Also in this case, as in the case of a normal fire, the open / close control valve 4 is fully opened or opened to a predetermined opening degree to perform appropriate fire extinguishing.
[0024]
As described above, according to the present embodiment, the open / close control valve 4 is normally kept in a half-open state, and the fire-extinguishing water flows out from the secondary side pipe 2 as in the case of the outbreak of the closed sprinkler head 1. In this case, the open / close control valve 4 is closed, so that it is possible to respond immediately in the event of a fire, and to reduce water loss in the event of an outbreak of the closed sprinkler head 1. In particular, since the open / close control valve 4 is normally in a half-open state, the time required to close the valve may be very short, so that the effect of suppressing water loss is great. Moreover, since the on-off control valve 4 is always half open, even if a failure or the like occurs in the electric system, water for fire extinguishing can be discharged and it is safe.
[0025]
In the above embodiment, the initial state of the open / close control valve 4 is set to a half-open state, and the degree of the half-open state is not specified, but this half-open state is when one closed sprinkler head 1 is opened. The normal water discharge required for the fire (for example, 80 liter / min when the regular water discharge is 80 liters / minute and 50 liters / minute are installed together) It can also be set. With this setting, the minimum water discharge required in the event of a fire can be secured, and the opening degree of the opening / closing control valve 4 can be reduced, so that the opening / closing control can be performed in the event of an outbreak of a closed sprinkler head. The time required to close the valve 4 can be further shortened, and the effect of preventing water loss can be enhanced.
In addition, since the open / close control valve 4 is opened from a half-open state to a full opening or a predetermined opening degree in the event of a fire, even when two or more sprinkler heads 1 at the fire site are operated and opened, sufficient fire extinguishing water is supplied. It can be supplied and the fire can be reliably extinguished.
[0026]
As shown by the dotted line in FIG. 1, the opening / closing control valve 4 and the flowing water detection device 3 may be directly connected by a signal line, and the control means may be provided in the opening / closing control valve 4. Also in this case, when the flowing water signal is input from the flowing water detection device 3 and the fire signal from the fire detector 8 is not input via the control panel 9, the open / close control valve 4 is fully closed.
Further, as the flowing water detection device, any system such as a check valve, a paddle type, a pressure sensing type such as a pressure switch, a flowmeter type or a flowmeter type may be used.
In addition, as shown with the equipment on the second floor, even when the flowing water detection device 3 is installed in the primary side pipe 5, the same operation and effect as described above can be achieved. This point is the same in the following embodiments.
[0027]
Embodiment 2. FIG.
In the present embodiment, the same device as that of the first embodiment shown in FIG. 1 is used, and only the control method of the control panel 9 is slightly changed. That is, in this embodiment, when only a running water signal is input, the opening degree of the on-off control valve 4 is changed from a half-open state to an intermediate state between the half-open state and the valve-closed state (hereinafter referred to as “semi-closed state”). In this state, the open / close control valve 4 is closed when a predetermined time (for example, about 30 seconds) elapses without a fire signal being input from the fire detector.
[0028]
FIG. 3 is a process flowchart of the control panel 9 according to the second embodiment of the present invention. The same processes as those in FIG. 2 are denoted by the same reference numerals. Hereinafter, based on FIG. 3, it demonstrates centering on the characteristic part of this Embodiment.
The control panel 9 determines whether or not a flowing water signal is input from the flowing water detection device 3 (S11). When it is determined that the flowing water signal is input, the control valve 4 that is in a half-open state is in a semi-closed state ( S110). Next, it is determined whether or not a fire signal is input from the fire detector 8 (S112). When it is determined that no fire signal is input, it is determined whether or not a predetermined time has elapsed (S113). ). The predetermined time here refers to the input of the fire signal from the input of the water flow signal when the closed sprinkler head 1 operates before the fire detector 8 and the water flow signal is input before the fire signal is input. For example, about 30 seconds. This is a process when a fire occurs just below the closed sprinkler head 1.
[0029]
When it is determined that the predetermined time has elapsed, the open / close control valve 4 in the semi-closed state is closed (S12), and the following processing is performed in S13 to S15 as described in the first embodiment. . If it is determined in S113 that the predetermined time has not elapsed, the presence / absence of a fire signal is determined again (S112).
When it is determined in S112 that there is a fire signal, the half-closed open / close control valve 4 is fully opened or opened to a predetermined opening degree (S52), and the following processing has been described in the first embodiment. The same processes S53 to S54 are performed.
[0030]
In this embodiment, when only a running water signal is input, the opening degree of the open / close control valve 4 is set to a semi-closed state, and a state in which no fire signal is input from the fire detector in this state is a predetermined time (for example, When about 30 seconds have elapsed, the on-off control valve 4 is closed, so that when the closed sprinkler head 1 is out of order, the valve closes from a semi-closed state, and more time is required until the valve is closed. Since it can be shortened and the semi-closed state is maintained, the amount of water supplied to the sprinkler head 1 can also be suppressed, and the effect of preventing water loss due to the sprinkler head 1 being expelled can be enhanced.
Further, even when a fire is generated directly below the closed sprinkler head 1 and the closed sprinkler head 1 is activated before the fire detector 8, the fire can be surely extinguished.
[0031]
Embodiment 3 FIG.
FIG. 4 is a system diagram of another embodiment of the present invention, in which the same or corresponding parts as those in FIG. 1 showing the first embodiment are denoted by the same reference numerals. In the figure, 25 is an open control valve that is installed between the primary side pipe 5 and the secondary side pipe 2 and is normally closed, and 27 is an open control between the primary side pipe 5 and the secondary side pipe 2. It is an open / close control valve that is normally opened and installed in parallel with the valve 25. The opening / closing control valve 27 is smaller than the opening control valve 25, and an orifice is provided on the primary side of the opening / closing control valve 27. The amount of water discharged for at least one closing sprinkler head 1, for example, 50 liters. It is set so that the amount of water can flow from 80 to 80 liters / minute. The opening control valve 25 and the opening / closing control valve 27 are controlled to be opened and closed by the control panel 9.
[0032]
FIG. 5 is a process flowchart of the control panel 9 in the third embodiment shown in FIG. Hereinafter, the processing of the control panel 9 will be described based on FIG. 5 and the operation of each device shown in FIG. 4 will be described. Note that the processing itself of the control panel 9 is almost the same as that described in the first embodiment, and therefore, the same reference numerals as those in FIG.
The control panel 9 determines whether or not a flowing water signal is input from the flowing water detection device 3 (S11), and when it is determined that a flowing water signal is input, the control valve 27 is fully opened (S12). . At this time, since the opening / closing control valve 27 is small, the valve closing operation can be performed in a very short time.
[0033]
Next, it is determined whether or not a fire signal is input from the fire detector 8 (S13). When it is determined that no fire signal is input, it is determined whether or not a preset abnormal time has elapsed (S14). ). The abnormal time is the same as in the first embodiment, and is a time sufficient to determine that the generation of the flowing water signal is due to the sprinkler head 1 being expelled, for example, about 5 minutes. When it is determined that the abnormal time has elapsed, the control panel 9 outputs an abnormal signal and issues an alarm. If it is determined in S14 that the abnormal time has not elapsed, the presence / absence of a fire signal is determined again (S13).
The flow of S11 to S15 described above is a case where there is no fire signal in spite of the presence of a water flow signal, and shows the processing when the closed sprinkler head 1 is expelled, and by closing the open / close control valve 27, Water for fire extinguishing of the primary side pipe 5 is not sent to the secondary side pipe 2, and water loss can be kept small.
[0034]
If it is determined in S11 that there is no running water signal, the presence or absence of a fire signal is further determined (S51). If it is determined in S51 that there is no fire signal, the process returns to S11 to determine whether there is a running water signal. As described above, the loop of S11 and S51 shows the processing in the normal monitoring state.
If it is determined in S51 that there is a fire signal, the opening control valve 25 is fully opened from the closed state to a predetermined opening degree (S52). The predetermined opening degree refers to an opening degree that is not yet fully opened but is sufficient for the amount of water to be discharged from the closed sprinkler head to flow.
[0035]
Next, it is determined whether or not there is a water discharge stop command (S53), and if there is, the open control valve 25 and the open / close control valve 27 are closed (S54). The water discharge stop command is a signal issued when a person who has confirmed the fire extinguishing when the fire is extinguished, for example, presses a push button switch for a water discharge stop command provided on the control panel 9. When it is determined that there is no water discharge stop command in the determination of S53, the open control valve 25 and the open / close control valve 27 are closed until there is a water discharge stop command (S54).
[0036]
The processing from S11, S51 to S54 shows the processing operation of the control panel 9 when a fire occurs. Accordingly, in this case, as described above, the opening control valve 25 is fully opened or opened to a predetermined opening, so that the water for extinguishing the primary side pipe 5 flows out and is discharged from the closed sprinkler head 1. And by the outflow of the water for fire extinguishing in the primary side piping 5, the pressure of the pressure air tank 17 which is not shown in figure falls, the pressure switch 19 operates, the fire extinguishing pump 6 is started, and the water for fire extinguishing of the water source water tank 7 is pressurized and supplied. And proper fire fighting operation continues.
[0037]
If it is determined in S13 that there is a fire signal, the open control valve 25 is fully opened from the closed state or opened to a predetermined opening degree, and the open / close control valve 27 is fully opened (S52). The processes of S53 and S54 are performed. The processes of S11 to S13 and S52 to S54 are processes when a fire signal is detected after detecting a flowing water signal, that is, when a fire has occurred just below the closed sprinkler head 1 or the like. In this case as well, as in the case of a normal fire, the opening control valve 25 is fully opened or opened to a predetermined opening, and appropriate fire extinguishing is performed. In S52, the opening / closing control valve 27 may be fully opened.
[0038]
As described above, according to the present embodiment, the open control valve 25 is normally closed and the open / close control valve 27 is fully opened, and the secondary side pipe 2 is discharged as if the closed sprinkler head 1 is expelled. Since the on-off control valve 27 is closed when fire extinguishing water flows out, it is possible to respond immediately in the event of a fire, and to reduce water loss in the event of a sprinkler head 1 outbreak. In particular, since the opening / closing control valve 27 is small, the time required to close the valve may be very short, and thus the effect of preventing water loss is high.
In addition, since the open / close control valve 27 is normally open, fire-extinguishing water can be discharged even if a failure or the like occurs in the electrical system, which is safe.
[0039]
In the above embodiment, the orifice of the open / close control valve 27 can flow at least one water discharge amount of the closed sprinkler head 1, for example, 50 liters / minute to 80 liters / minute. Although set, the orifice of the on-off control valve 27 can be specified as one that can flow a water amount corresponding to the water discharge amount for one closed sprinkler head. If specified in this way, the minimum water discharge amount required in the event of a fire can be secured and the open / close control valve 27 can be made the smallest, so that the open / close control valve 27 is closed when the closed sprinkler head 1 is out of control. The time required for the valve can be further shortened, and the effect of preventing water loss can be enhanced.
[0040]
Embodiment 4 FIG.
In the present embodiment, the same equipment as in the third embodiment shown in FIG. 4 is used, and only the control method of the control panel 9 is slightly changed. That is, in the present embodiment, when only a running water signal is input, the open / close control valve 27 is changed from a fully open state to a half open state that is an intermediate state between the fully open state and the closed state, and in this state fire detection is performed. The open / close control valve 27 is closed when a predetermined time (for example, about 30 seconds) elapses when no fire signal is input from the container 8.
[0041]
FIG. 6 is a process flowchart of the control panel 9 according to the fourth embodiment of the present invention. The same processes as those in FIG. 5 are denoted by the same reference numerals. Hereinafter, based on FIG. 6, it demonstrates centering on the characteristic part of this Embodiment.
The control panel 9 determines whether or not a flowing water signal is input from the flowing water detection device 3 (S11), and when it is determined that the flowing water signal is input, the open / close control valve 27 in the fully opened state is set to a half-open state (S111). ). Next, it is determined whether or not a fire signal is input from the fire detector 8 (S112). When it is determined that no fire signal is input, it is determined whether or not a predetermined time has elapsed (S113). ). The predetermined time is the same as that shown in the second embodiment. In the event of a fire, after the closed sprinkler head 1 is operated and the running water signal is output first, the fire detector is operated and the fire signal is generated. This is the time required from the output of the flowing water signal to the output of the fire signal when it is output, for example, about 30 seconds.
[0042]
When it is determined that the predetermined time has elapsed, the open / close control valve 27 in the half-open state is closed (S12), and thereafter, the same processes of S13 to S15 as described in the third embodiment are performed. If it is determined in S113 that the predetermined time has not elapsed, the presence / absence of a fire signal is determined again (S112).
If it is determined in S112 that there is a fire signal, the open control valve 25 in the closed state is fully opened or opened to a predetermined opening degree (S521), and the open / close control valve 27 is closed from the semi-closed state to the closed state. (S522) Thereafter, the same processing of S53 to S54 as described in the third embodiment is performed. Note that it is not necessary to close the opening / closing control valve 27 in S522. In this case, the opening / closing control valve 27 may be closed in addition to the opening control valve 25 in S54.
[0043]
In the present embodiment, when only a running water signal is input, the opening degree of the open / close control valve 27 is set to a half-open state, and a state in which no fire signal is input from the fire detector 8 in this state is a predetermined time (for example, 30). When the elapsed time has elapsed, the on-off control valve 27 is closed, so that when the closed sprinkler head 1 is out of order, the valve is closed from the half-open state, and the time required for closing the valve is further shortened. Therefore, the effect of preventing water loss due to the sprinkler head 1 being expelled can be further enhanced.
Further, even when a fire is generated directly below the closed sprinkler head 1 and the closed sprinkler head 1 is activated before the fire detector 8, the fire can be surely extinguished.
[0044]
In addition, when considering the open / close control valve 27 and the open control valve 25 connected in parallel between the primary side pipe 5 and the secondary side pipe 2, only the open / close control valve 27 is normally fully open. It can be said that the pipes in the parallel portion are in a half-open state as in the first embodiment. In addition, when a running water signal is first input to the control panel 9 and the open / close control valve 27 is changed from a fully open state to a half open state, it can be said that it is in a semi-closed state when viewed from the entire parallel piping.
[0045]
By the way, in each said embodiment, the water pressure added to the primary side of each opening-and-closing control valve 4 and 27 and also the open control valve 25 changes with each installation position (installation height). That is, the primary side water pressure of the opening / closing control valves 4 and 27 and the opening control valve 25 provided on the first floor of the building is high, and the opening and closing control valves 4 and 27 provided on the 10th floor are opened. The primary water pressure of the control valve 25 is lower than that of the first floor by an altitude difference. Due to this water pressure difference, the amount of water passing through the open / close control valves 4 and 27 and the open control valve 4 in the fully open or half open state is different at the time of fire extinguishing water discharge or when the sprinkler head 1 is outbursted.
For this reason, the opening / closing control valves 4 and 27 and the opening control valve 25 are valves that can adjust the opening degree, such as an electric valve, and the opening degree when fully opened, the opening degree when half opened, and the half opening degree according to the primary pressure. What is necessary is just to adjust the amount of passing water by varying the opening degree.
In other words, taking the open / close control valve 4 as an example, the opening at the time of half-opening and full-opening can be selected from, for example, three types of low pressure, medium pressure, and high pressure. When the low pressure is selected (for example, with a selection switch) on the basis of the degree, the opening is made larger than the medium pressure, and when the high pressure is selected, the opening is made smaller than the medium pressure. . Similarly, when the valve is fully open, the opening for medium pressure is used as a reference. Make it smaller than medium pressure.
[0046]
The open / close control valve is in a half-open state and the open control valve is in a fully open state.
And, for example, the open / close control valves and open control valves installed from the 2nd basement to the 2nd floor (high pressure floor) with high water pressure can be installed for high pressure, and the water pressure can be installed from the 3rd floor to the 6th floor (intermediate pressure floor). Items are set for medium pressure, and those installed on the 7th to 10th floors (high pressure floor) where the water pressure is low are set for low pressure.
As a result, the amount of water passing through the on / off control valve when the on / off control valve is half-opened, that is, the amount of water discharged from the sprinkler head, can be made the same amount of water from the lower floor where the primary pressure is high to the lower floor where the pressure is high And when the open control valve is fully open, the amount of water passing through the open control valve and the open control valve, that is, the amount of water discharged from the sprinkler head, can be made substantially the same regardless of the difference in water pressure on the primary side.
[0047]
【The invention's effect】
As described above, the invention according to claim 1 is provided with the open / close control valve that is normally kept in a half-open state, and when the fire detector detects a fire, the open / close control valve is fully opened or until a predetermined opening degree. The open / close control valve is closed when the running water detection means detects running water while the fire detector does not detect a fire, so it can respond immediately in case of a fire, and the sprinkler head will explode. Even in this case, the time required for closing the valve is short, and water loss can be kept small. Moreover, even if a failure or the like occurs in the electric system, fire-fighting water is discharged, which is safe.
[0048]
In the invention according to claim 2 or 6, since the normal state of the open / close control valve is set to a state in which a regular water discharge amount required when one of the closed sprinkler heads is opened can be supplied. In addition, it is possible to minimize the opening degree of the open / close control valve while ensuring the necessary water supply amount in the event of a fire, and to further reduce water loss in the event of a sprinkler head burst.
[0049]
Furthermore, in the invention according to claim 3 or 7, when the running water detection means detects running water in a state where the fire detector does not sense a fire, the open / close control valve is closed after a predetermined time has elapsed since the running water was detected. Since the valve is operated, the fire can be surely extinguished even when the fire is generated directly under the closed sprinkler head and the closed sprinkler head is activated before the fire detector.
[0050]
Further, in the invention according to claim 4 or 8, when the flowing water detecting means detects flowing water, the open / close control valve is set in a semi-closed state, and in this state, the fire detector opens and closes after a predetermined time has passed without detecting a fire. Since the control valve is closed, it is possible to further reduce the water loss when the sprinkler head is expelled.
[0051]
Furthermore, the invention according to claim 5 includes an open control valve that is provided in the water supply pipe and normally maintains a closed state, and an open / close control valve that normally maintains the open state. When a fire is detected by the fire detector, the open control valve is fully opened or opened to a predetermined opening, and when running water is detected without a fire detected, the open / close control valve is closed. Therefore, it is possible to respond immediately in the event of a fire, and even if the sprinkler head is out of order, the time required to close the valve is short and water loss can be kept small. Moreover, even if a failure or the like occurs in the electric system, fire-fighting water is discharged, which is safe.
[Brief description of the drawings]
FIG. 1 is a system diagram of an embodiment of the present invention.
FIG. 2 is a flowchart showing a flow of processing of the control panel in the first embodiment.
FIG. 3 is a flowchart showing a process flow of a control panel in the second embodiment.
FIG. 4 is a system diagram of another embodiment of the present invention.
FIG. 5 is a flowchart showing a process flow of a control panel in the third embodiment.
FIG. 6 is a flowchart showing a process flow of a control panel in the fourth embodiment.
[Explanation of symbols]
1 Closed sprinkler head
2 Secondary piping
3 Flowing water detection device
4 Open / close control valve
5 Primary piping
8 Fire detector
9 Control panel

Claims (8)

A closed sprinkler head attached to the tip side of the water supply pipe;
A fire detector installed in a protected area equipped with the closed sprinkler head and detecting a fire;
Installed in the water supply pipe, and a water flow detecting means for detecting water flowing in the water supply pipe;
An open / close control valve provided in the water supply pipe and normally maintaining a half-open state;
When the fire detector detects a fire, the open / close control valve is fully opened or opened to a predetermined opening degree. A sprinkler fire extinguishing system characterized in that the control valve is closed. 2. The sprinkler according to claim 1, wherein a normal half-open state of the open / close control valve is set to a state in which a normal water discharge amount required when one of the closed sprinkler heads is opened. Fire extinguishing equipment. When the running water detection means detects running water in a state where the fire detector does not detect a fire, the opening / closing control valve is closed after a predetermined time has elapsed since the running water detection means detected running water. The sprinkler fire extinguishing equipment according to claim 1 or 2. When the flowing water detecting means detects flowing water, the open / close control valve is in a semi-closed state, and in this state, the open / close control valve is closed when a predetermined time elapses without detecting a fire. The sprinkler fire extinguishing equipment according to claim 1 or 2. A closed sprinkler head attached to the tip side of the water supply pipe;
A fire detector installed in a protected area equipped with the closed sprinkler head and detecting a fire;
Installed in the water supply pipe, and a water flow detecting means for detecting water flowing in the water supply pipe;
An open control valve provided in the water supply pipe and normally maintaining a closed state;
An open / close control valve that is installed in parallel with the open control valve and that normally maintains the open state;
When the fire detector detects a fire, the open control valve is fully opened or opened to a predetermined degree of opening, and when the water flow detecting means detects the water flow without the fire detector detecting a fire, the opening / closing is performed. A sprinkler fire extinguishing system characterized in that the control valve is closed. The open / close control valve is made smaller than the open control valve, and the normal open state of the open / close control valve is set to a normal water discharge amount required when one of the closed sprinkler heads is opened. The sprinkler fire extinguishing equipment according to claim 5, wherein the sprinkler fire extinguishing equipment is set in a state where water can be supplied. When the running water detection means detects running water in a state where the fire detector does not detect a fire, the opening / closing control valve is closed after a predetermined time has elapsed since the running water detection means detected running water. The sprinkler fire extinguishing equipment according to claim 5 or 6. When the flowing water detecting means detects flowing water, the open / close control valve is in a semi-closed state, and in this state, the open / close control valve is closed when a predetermined time elapses without the fire detector detecting a fire. The sprinkler fire extinguishing equipment according to claim 5 or 6.

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