JPH10179787A - Sprinkler fire extinguishing equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sprinkler fire extinguishing equipment capable of immediately coping with fire generation, suppressing water loss small even in the case that the breakage of a sprinkler head accidentally goes off and surely extinguishing a fire even in the case that an electric system or the like fails. SOLUTION: This sprinkler fire extinguishing equipment is provided with a closed type sprinkler head 1 attached to the tip side of water supply pipes 2 and 5, a fire sensor 8 installed in a protection area where the closed type sprinkler head 1 is equipped for sensing the fire, a flowing water detector 3 installed in the water supply pipes 2 and 5 for detecting flowing water inside the water supply pipes 2 and 5 and an opening/closing control valve 4 provided in the water supply pipes 2 and 5 for maintaining a half open state at normal time. Then, the opening/closing control valve 4 is opened fully or to a prescribed open degree when the fire sensor 8 senses the fire and the opening/closing control valve 4 is closed when the flowing water detector 3 detects the flowing water in a state where the fire sensor 8 does not sense the fire.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a sprinkler fire extinguishing system.

[0002]

2. Description of the Related Art Conventional wet sprinkler fire extinguishing equipment is
Since the fire extinguishing water is filled over the entire pipe of the water supply pipe, if a cause other than a fire, for example, an object hits the sprinkler head and the head is damaged, the fire extinguishing water in the water supply pipe is discharged ( Hereinafter, the discharge of the fire extinguishing water due to the breakage of the sprinkler head is referred to as “sprinkler head explosion”.) This causes a problem that a large water loss occurs. As a technique for preventing water damage due to such sprinkler head explosion, Japanese Patent Publication No. 7-1
There is an invention of a wet pre-actuated running water detection device described in Japanese Patent No. 2382.

[0003] The invention described in the publication discloses a valve element for opening and closing a communication part between a primary chamber to which fire extinguishing water is supplied and a secondary chamber to which a closed type sprinkler head is connected via a pipe. A pre-actuated running water detection device, comprising: an opening valve having an opening valve, and wherein the opening valve is configured to maintain a closed state in a state where a pressure fluid is sealed in the pipe and the secondary chamber. When the sprinkler head has an abnormality, the liquid which flows out to the outside is sealed in the secondary chamber side of the opening valve at a lower pressure than the primary chamber and regardless of the primary chamber side.

In the technique disclosed in the above publication, the valve is opened when two conditions are satisfied, that is, a fire detection signal of a fire detector and a decrease in pressure in the secondary chamber, and the valve is opened from the primary chamber. When fire extinguishing water is supplied to the secondary room, on the other hand, if an abnormal situation such as breakage of the sprinkler head occurs,
Only the liquid in the secondary chamber is allowed to flow out of the sprinkler head to the outside without opening the valve element.

[0005]

However, in the conventional wet pre-operation type running water detecting device constructed as described above, a failure has occurred in a portion having an electric circuit such as a fire detector or a control means. In such a case, it is conceivable that the fire cannot be extinguished because the valve body does not open.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and can immediately respond to the occurrence of a fire.
It is an object of the present invention to provide a sprinkler fire extinguishing system that can reduce water loss even when a sprinkler head is damaged and a fire occurs, and can surely extinguish a fire even when a failure occurs in an electric system or the like.

[0007]

SUMMARY OF THE INVENTION A sprinkler fire extinguishing system according to the present invention is installed in a closed sprinkler head attached to a distal end of a water supply pipe and in a protection area where the closed sprinkler head is installed, and a fire is prevented. A fire detector for sensing, a flowing water detecting means installed in the water supply pipe to detect flowing water in the water supply pipe, and 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, and when the running water detecting means detects flowing water in a state where the fire detector does not detect a fire, The on-off control valve is closed.

[0008] Further, the half open state of the open / close control valve in a normal state is set to a state in which a normal water discharge amount required when one of the closed type sprinkler heads is opened can be supplied.

Further, when the flowing water detecting means 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 passed since the flowing water detecting means has detected flowing water. It is something to do.

When the flowing water detecting means detects flowing water, the open / close control valve is set to a half-closed state. In this state, the open / close control valve is closed when a predetermined time has passed without a fire detector detecting a fire. It is something to do.

Furthermore, a closed sprinkler head attached to the distal end side of the water supply pipe, a fire detector installed in a protection area where the closed sprinkler head is installed, for detecting a fire, and a fire detector installed in the water supply pipe. A flowing water detecting means for detecting flowing water in the water supply pipe; an open control valve provided in the water supply pipe and normally maintaining a closed state; and Is provided with an open / close control valve that maintains an open state. When the fire detector detects a fire, the open control valve is fully opened or opened to a predetermined opening, and the fire detector detects a fire. The on-off control valve is closed when the flowing water detecting means detects flowing water in a state where the flowing water is not detected.

In addition, the opening / closing control valve is made smaller than the opening control valve, and the normal opening state of the opening / closing control valve is required when one of the closed type sprinkler heads is opened. It is set so that a regular amount of water can be delivered.

Further, when the running water detecting device detects running water in a state where the fire detector does not detect a fire, the opening / closing control valve is closed after a lapse of a predetermined time from the running water detecting means detecting the running water. It is intended to be.

When the flowing water detecting means detects flowing water, the open / close control valve is closed in a semi-closed state. In this state, the open / close control valve is closed when a predetermined time elapses without the fire detector detecting a fire. It is intended to be a valve.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION

Embodiment 1 FIG. FIG. 1 is a system diagram of an embodiment of the present invention, and shows facilities installed on the first and second floors as an example of a protected area of a building. In the part enclosed by the dashed line in the figure, A is the equipment on the first floor, and B is the equipment on the second floor. The facilities on the first floor, the facilities on the second floor, and the facilities on other floors not shown are basically the same, so that the facilities on the first floor will be described below, and only the different parts will be described later. In the figure, 1 is attached to the tip side of a secondary pipe 2 as a water supply pipe, a plurality of closed-type sprinkler heads installed on a ceiling surface or the like, 3 is attached to the secondary pipe 2, When the pressurized water in the side pipe 2 flows out of the closed type sprinkler head 1, a flowing water detecting device as flowing water detecting means for detecting the flow and outputting a flowing water signal;
Reference numeral 4 denotes an opening / closing control valve that separates the secondary pipe 2 from a primary pipe 5 described later. The opening / closing control valve 4 is normally kept in a half-open state. Reference numeral 5 denotes a primary pipe having one end connected to the open / close control valve 4 and the other end connected to the water source water tank 7 via a check valve 15 and a fire extinguishing pump 6 described later, and 6 denotes a sprinkler for extinguishing water in the water source water tank 7. A fire pump for feeding water to the head 1 and a water source tank 7 for storing fire fighting water.

Reference numeral 17 denotes a pressure air tank in which compressed air for pressurizing the inside of the primary pipe 5 and the secondary pipe 2 to a predetermined pressure is stored, and 19 denotes a pressure of the compressed air in the pressure air tank 17 at a predetermined value. This is a pressure switch that is activated when the pressure drops below the threshold.
Further, reference numeral 8 denotes a fire detector which is installed in a protection area where the closed type sprinkler head 1 is installed, detects a fire and outputs a fire signal, and 9 denotes a fire signal of the fire detector 8 and a running signal of the running water detector 3. And a control panel for controlling the opening and closing of the opening and closing control valve 4 based on the input signal. Further, the control panel 9 receives the signal of the pressure switch 19 and
Start up.

The second-floor equipment is different from the first-floor equipment in that the flowing water detecting device 3 is installed on the fire pump 6 side of the on-off control valve 4 of the water supply pipe, that is, on the primary pipe 5. Is the same as the equipment on the first floor.

FIG. 2 is a processing flowchart of the control panel 9 in the first embodiment shown in FIG. Hereinafter, the process 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 the running water signal from the running water detection device 3 has been input (S
11) When it is determined that a running water signal has been input, the on / off 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 an extremely short time as compared with the case of closing from the fully open state.

Next, it is determined whether or not a fire signal has been input from the fire detector 8 (S13). If it is determined that no fire signal has been input, it is determined whether or not a preset abnormal time has elapsed. (S14). The abnormal time is
This is a time sufficient to determine that the generation of the flowing water signal is caused by the sprinkler head explosion, 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. S1
If it is determined in step 4 that the abnormal time has not elapsed, it is determined again whether there is a fire signal (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 running water signal, that is, when the closed-type sprinkler head violates, and the like. The fire-extinguishing water in the side pipe 5 is no longer sent to the secondary side pipe 2, and water loss can be suppressed.

If it is determined in step S11 that there is no running water signal, it is further determined whether there is a fire signal (S51). If it is determined in step S51 that there is no fire signal, the process returns to step S11 to determine whether there is a running water signal. The loop of S11 and S51 shows a process in a normal monitoring state. If it is determined in step S51 that there is a fire signal, the open / close control valve 4 is opened from the half-open state to the full open state or a predetermined opening degree (S52). The predetermined opening degree is an opening degree that has not reached the full opening but is sufficient to allow the amount of water to flow from the closed sprinkler head 1 to flow. At this time, since the opening / closing control valve 4 is opened from the half-open state to the full opening state or a predetermined opening degree, the opening operation can be performed in an extremely short time.

Next, it is determined whether there is a water discharge stop command (S5).
3) If yes, close the open / close control valve 4 (S5)
4). The water discharge stop command is a signal issued when a person who confirms the extinguishing of the fire when the fire is extinguished presses, for example, a push button switch provided on the control panel 9 for the water discharge stopping command. If it is determined in step S53 that there is no water discharge stop command, the process waits until there is a water discharge stop command, and performs the valve closing operation of the open / close control valve 4 (S54).

Steps S11 and S51 to S54 show the operation of the control panel 9 when a fire occurs. Therefore, in this case, since the opening / closing control valve 4 is fully opened or opened at a predetermined opening as described above, the fire extinguishing water in the primary distribution pipe 5 flows out and is discharged from the closed sprinkler head 1. . Then, the pressure of the pressurized air tank 17 decreases due to the outflow of fire-extinguishing water in the primary pipe 5, and the pressure switch 1
The fire pump 9 is activated, the fire pump 6 is activated, and the fire-fighting water in the water source water tank 7 is supplied under pressure, and an appropriate fire-fighting operation is continued.

If it is determined in step S13 that there is a fire signal, the open / close control valve 4 is opened from the closed state to a fully opened state or a predetermined opening degree (S52).
3 and S54 are performed. These S11 to S13 to S
The process of 54 is a process in a case where a fire signal is detected after detecting a flowing water signal, that is, a case in which a fire occurs near the closed type sprinkler head 1. In this case, as in the case of a normal fire, the on-off control valve 4 is fully opened or opened to a predetermined opening to perform appropriate fire extinguishing.

As described above, according to the present embodiment, the open / close control valve 4 is normally kept in the half-open state, and the fire extinguishing water flows out of the secondary side pipe 2 such as when the closed sprinkler head 1 goes out of control. The opening and closing control valve 4 is closed in the event of a fire, so that a fire can be dealt with immediately and water loss can be reduced to a small extent in the event of an outbreak of the closed sprinkler head 1. In particular, since the opening / closing control valve 4 is normally in the half-open state, the time required to close the valve may be extremely short, and the effect of suppressing water loss is great. Further, since the on-off control valve 4 is always half-opened, even if a failure or the like occurs in the electric system, it is possible to discharge fire-extinguishing water, which is safe.

In the above embodiment, the initial state of the on-off control valve 4 is set to a half-open state, and the degree of the half-open state is not specified. Fire-extinguishing water of a regular water discharge amount required when plugged (for example, 80 L / min when the regular discharge amount is 80 L / min and the 50 L / min mixture is installed). It can also be set to a flowing state. With this setting, it is possible to secure the minimum amount of water discharge required in the event of a fire and to reduce the opening of the open / close control valve 4, so that the open / close control can be performed in the event of a closed sprinkler head explosion. Valve 4
The time required to close the valve can be further reduced,
The effect of preventing water damage can be enhanced. In addition, in the event of a fire, the on-off control valve 4 is opened from a half-open state to a full-open state or a predetermined opening degree. Therefore, even when two or more sprinkler heads 1 at the fire site are operated and opened, sufficient fire extinguishing water is supplied. Can supply and reliably extinguish fires.

As shown by the dotted line in FIG. 1, the open / close control valve 4 and the flowing water detecting device 3 may be directly connected by a signal line, and the control means may be provided in the open / close control valve 4. Also in this case, if the running water signal is input from the running water detection device 3 and the fire signal from the fire detector 8 is not input via the control panel 9, the opening / closing control valve 4 is fully closed. Further, as the flowing water detecting device, any type such as a check valve, a paddle type, a pressure sensing type such as a pressure switch, a flow meter type or a flow meter type may be used. In addition, as shown in the facility on the second floor, even when the flowing water detecting device 3 is installed in the primary side pipe 5, the same operation and effect as described above can be obtained. This point is the same in the following embodiments.

Embodiment 2 FIG. In the present embodiment, the same equipment 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 the present embodiment, when only the flowing water signal is input, the opening degree of the on-off control valve 4 is changed from the half-open state to an intermediate state between the half-open state and the closed state (hereinafter, referred to as a “half-closed state”). In this state, if a predetermined time (for example, about 30 seconds) elapses without a fire signal being input from the fire detector, the opening / closing control valve 4 is closed.

FIG. 3 is a processing 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. In the following, based on FIG. 3, a description will be given focusing on the characteristic portions of the present embodiment. The control panel 9 determines whether or not a running water signal has been input from the running water detection device 3 (S11). When it is determined that a running water signal has been input, the open / close control valve 4 that is in a half-open state is set to a half-closed state ( S
110). Next, it is determined whether a fire signal has been input from the fire detector 8 (S112). If it is determined that no fire signal has been input, it is determined whether a predetermined time has elapsed (S113). ). Here, the predetermined time means that the closed type sprinkler head 1 operates before the fire detector 8 and the running water signal is input before the fire signal is input. , For example, about 30 seconds. This processing is performed when a fire occurs immediately below the closed sprinkler head 1.

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 steps S13 to S1 similar to those described in the first embodiment.
Step 5 is performed. If it is determined in S113 that the predetermined time has not elapsed, it is determined again whether there is a fire signal (S112). If it is determined in S112 that a fire signal is present, the half-closed on / off control valve 4 is fully opened or opened to a predetermined opening (S5).
2) In the following processing, the same processing of S53 to S54 as described in the first embodiment is performed.

In this embodiment, when only a flowing water signal is input, the opening of the on-off control valve 4 is set to a half-closed state, and in this state, a state in which a fire signal from the fire detector is not input is determined. After a lapse of time (for example, about 30 seconds), the opening / closing control valve 4 is closed. Therefore, if the closed type sprinkler head 1 goes out of control, the valve will be closed from a semi-closed state, which is required until the valve is closed. Since the time can be shortened and the half-closed state is maintained, the supply amount of water to the sprinkler head 1 can also be suppressed, and the effect of preventing water damage due to the explosion of the sprinkler head 1 can be enhanced. it can. In addition, fire is a closed type sprinkler head 1
The fire can be surely extinguished even when the closed sprinkler head 1 is activated immediately before the fire detector 8 and the closed type sprinkler head 1 is activated.

Embodiment 3 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 drawing, reference numeral 25 denotes an open control valve which is installed between the primary pipe 5 and the secondary pipe 2 and is normally in a closed state, and 27 denotes an open control valve between the primary pipe 5 and the secondary pipe 2. It is an open / close control valve which is installed in parallel with the valve 25 and is normally in a fully open state.
The opening / closing control valve 27 is smaller than the opening control valve 25, and is provided with an orifice on the primary side of the opening / closing control valve 27. The water discharge amount of at least one closed sprinkler head 1, for example, 50 liters / Min-80 liters /
It is set so that the amount of water can flow. The opening and closing of the opening control valve 25 and the opening and closing control valve 27 are controlled by the control panel 9.

FIG. 5 is a processing flowchart of the control panel 9 in the third embodiment shown in FIG. Hereinafter, the processing of the control panel 9 will be described with reference to FIG. 5, and the operation of each device shown in FIG. 4 will be described. Since the processing itself of the control panel 9 is almost the same as that described in the first embodiment, the same reference numerals as in FIG. 2 denote the same or corresponding processing as in FIG. The control panel 9 determines whether or not a running water signal has been input from the running water detection device 3 (S11). If it determines that a running water signal has been input, the control panel 9 closes the open / close control valve 27 that is fully open (S12). . At this time, the opening / closing control valve 27
Is compact, so that the valve closing operation can be performed in a very short time.

Next, it is determined whether or not a fire signal has been input from the fire detector 8 (S13). If it is determined that no fire signal has been input, it is determined whether or not a preset abnormal time has elapsed. (S14). The abnormal time is
This is the same as in the first embodiment, and is a time sufficient to determine that the generation of the running water signal is caused by the explosion of the sprinkler head 1, 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. In the judgment of S14,
If it is determined that the abnormal time has not elapsed, it is determined again whether there is a fire signal (S13). S11 described above
The flow from Step S15 to Step S15 is a case where there is no fire signal in spite of the running water signal, and shows a process when the closed type sprinkler head 1 is outbursted. Is no longer sent to the secondary side pipe 2, and water loss can be suppressed to a small level.

If it is determined in step S11 that there is no running water signal, it is further determined whether there is a fire signal (S51). If it is determined in step S51 that there is no fire signal, the process returns to step S11 to determine whether there is a running water signal. Thus, the loop of S11 and S51 is
This shows a normal monitoring state process. If it is determined in S51 that there is a fire signal, the opening control valve 2
5 is opened from a valve-closed state to a fully opened state or a predetermined opening degree (S
52). The predetermined opening degree is an opening degree that has not reached full opening but is sufficient to allow a flow of water for discharging water from the closed sprinkler head.

Next, it is determined whether there is a water discharge stop command (S5).
3) If there is, the opening control valve 25 and the opening / closing control valve 2
7 is closed (S54). The water discharge stop command is a signal issued when a person who confirms the extinguishing of the fire when the fire is extinguished presses, for example, a push button switch provided on the control panel 9 for the water discharge stopping command. When it is determined in S53 that there is no water discharge stop command, the control waits until there is a water discharge stop command, and performs the closing operation of the open control valve 25 and the open / close control valve 27 (S54).

Steps S11 and S51 to S54 show the processing operation of the control panel 9 when a fire occurs. Therefore, in this case, since the opening control valve 25 is fully opened or opened to a predetermined opening as described above, the fire extinguishing water in the primary pipe 5 flows out, and the closed sprinkler head 1 is closed.
It is discharged from. Then, due to the outflow of fire extinguishing water in the primary side pipe 5, the pressure of the pressure air tank 17 (not shown) is reduced, the pressure switch 19 is operated to start the fire extinguishing pump 6, and the fire extinguishing water in the water source water tank 7 is supplied under pressure. And the appropriate fire extinguishing operation is continued.

If it is determined in S13 that there is a fire signal, the open control valve 25 is fully opened or opened to a predetermined opening from the closed state, and the open / close control valve 27 is fully opened (S52). Performs the processing of S53 and S54 described above. The processing of S11 to S13 and S52 to S54 is performed when a fire signal is detected after detecting a running water signal.
That is, this processing is performed when a fire occurs just below the closed type sprinkler head 1 or the like. Also in this case, as in the case of a normal fire, the opening control valve 25 is fully opened or opened to a predetermined opening to perform appropriate fire extinguishing. Note that the open / close control valve 27 may be fully opened in S52.

As described above, according to the present embodiment, the opening control valve 25 is normally closed and the opening and closing control valve 27 is fully opened, so that the secondary sprinkler head 1 can be operated in a secondary manner, such as when the closed type sprinkler head 1 goes out of control. When the fire extinguishing water flows out of the side piping 2, the on-off control valve 27 is closed, so that it is possible to respond immediately in the event of a fire, and to minimize water loss in the event of a sprinkler head 1 explosion. Can be. Especially,
Since the opening / closing control valve 27 is small, the time required to close the valve may be extremely short, so that the effect of preventing water damage is high. Further, since the opening / closing control valve 27 is normally open, even if a failure or the like occurs in the electric system, it is possible to discharge fire-extinguishing water, which is safe.

In the above embodiment, the orifice of the on-off control valve 27 is allowed to flow at least the amount of water discharged from one closed sprinkler head 1, for example, 50 to 80 liters / minute. Although the setting is made so that the water can be discharged, the orifice of the opening / closing control valve 27 can be specified to be capable of flowing an amount of water equivalent to the amount of water discharged for one closed sprinkler head. With this specification, the minimum amount of water required in the event of a fire can be ensured, and the on-off control valve 27 can be made the smallest, so that the on-off control valve 27 is closed when the closed-type sprinkler head 1 goes out of control. The time required to open the valve can be further reduced, and the effect of preventing water damage can be enhanced.

Embodiment 4 FIG. In the present embodiment, the same equipment as that of 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 this embodiment, when only the flowing water signal is input, the open / close control valve 27 is changed from the fully open state to the half open state which is an intermediate state between the fully open state and the closed state, and in this state, the fire detection is performed. The opening / closing control valve 27 is closed after a predetermined time (for example, about 30 seconds) elapses without a fire signal being input from the heater 8.

FIG. 6 is a processing 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. In the following, based on FIG. 6, the description will focus on the features of the present embodiment. The control panel 9 determines whether or not a running water signal has been input from the running water detection device 3 (S11). When it is determined that a running water signal has been input, the open / close control valve 27 that is in the fully opened state is half-opened (S111). ). Next, it is determined whether a fire signal has been input from the fire detector 8 (S112). If it is determined that no fire signal has been input, it is determined whether a predetermined time has elapsed (S113). ). The predetermined time is the same as that described in the second embodiment. In the event of a fire, after the closed sprinkler head 1 operates and the running water signal is output first, the fire detector operates and the fire signal is output. This is the time required from the output of the running water signal to the output of the fire signal when it is output, for example, about 30 seconds.

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 S13 to S1 similar to those described in the third embodiment.
Step 5 is performed. If it is determined in S113 that the predetermined time has not elapsed, it is determined again whether there is a fire signal (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 (S112).
521) Further, the opening / closing control valve 27 is changed from the semi-closed state to the closed state (S522), and thereafter, the same processing of S53 to S54 as described in the third embodiment is performed. Note that S5
It is not necessary to close the open / close control valve 27 at 22. In this case, in addition to the open control valve 25, the open / close control valve 27 may be closed at S54.

In this embodiment, when only the flowing water signal is input, the opening of the on-off control valve 27 is set to a half-open state, and in this state, the state in which the fire signal is not input from the fire detector 8 is maintained for a predetermined time. (For example, about 30 seconds)
Since the on-off control valve 27 is closed, when the closed type sprinkler head 1 crashes, the valve is closed from a half-open state, so that the time required for closing the valve can be shortened, and the sprinkler head 1 can be shortened. The effect of preventing water damage due to the explosion can be further enhanced. In addition, a fire occurs just below the closed type sprinkler head 1 and the fire detector 8
Even when the closed type sprinkler head 1 is operated earlier than before, the fire can be surely extinguished.

When the open / close control valve 27 and the open control valve 25 connected in parallel between the primary pipe 5 and the secondary pipe 2 are considered together, only the open / close control valve 27 is normally in the fully open state. Therefore, it can be said that the pipe in the parallel portion is in a half-open state as in the first embodiment. Further, when the running water signal is input to the control panel 9 first and the on-off control valve 27 is changed from the fully opened state to the half-opened state, when viewed from the entire piping of the parallel part,
It can be said that it is in a semi-closed state.

By the way, in each of the above embodiments,
The water pressure applied to the primary side of each of the opening / closing control valves 4 and 27 and the opening control valve 25 differs depending on the respective installation position (installation height). That is, the opening and closing control valves 4 and 27 provided on the first floor of the building, for example, the primary side water pressure of the opening control valve 25 is high, and the opening and closing control valves 4 and 27 provided on the high floor, for example, the 10th floor, open, 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 opened or partially opened state at the time of fire extinguishing or sprinkling of the sprinkler head 1 is different. For this reason, valves that can adjust the opening degree, such as an electric valve, are used as the opening / closing control valves 4 and 27 and the opening control valve 25, and the opening degree at the time of full opening, the opening degree at half opening, What is necessary is just to make the opening degree different and adjust the amount of passing water. That is,
The opening and closing control valve 4 will be described as an example.
The seeds can be selected individually, and when half-opened, the opening for low pressure is selected based on the opening for medium pressure (for example, with a selection switch), so that the opening for medium pressure is larger than the opening for medium pressure. When selected, the opening is made smaller than that for medium pressure. Similarly, when fully open, the opening for medium pressure is used as a reference.When low pressure is selected, the opening is set to be larger than that for medium pressure, and when high pressure is selected, the opening is set. Make it smaller than for medium pressure.

The half-open state of the open / close control valve and the fully open state of the open control valve have the same configuration. For example, on-off control valves and open control valves installed on the second to second basement floors (high-pressure floor) with high water pressure were installed on the third to sixth floors (medium-pressure floors) where the water pressure was intermediate for high pressure. For medium pressure, low water pressure 7
Those installed from the floor to the 10th floor (high pressure floor) are set for low pressure respectively. 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 substantially the same from the lower floor where the primary pressure is high to the lower floor where low pressure is high. Also, when the opening control valve is fully opened, the amount of water passing through the opening control valve and the opening control valve, that is, the amount of water discharged from the sprinkler head can be made substantially the same regardless of the difference in the water pressure on the primary side.

[0047]

As described above, the invention according to claim 1 is provided with an opening / closing control valve which is normally kept in a half-open state, and when the fire detector detects a fire, the opening / closing control valve is fully opened or closed. When the fire detector does not detect a fire and the running water detecting means detects running water, the opening and closing control valve is closed, so that it can be responded immediately in the event of a fire. In addition, even when the sprinkler head goes out of control, the time required for closing the valve is short, and water loss can be reduced. In addition, even if a failure or the like occurs in the electric system, fire extinguishing water is discharged, which is safe.

According to the second or sixth aspect of the present invention, the normal state of the on-off control valve is changed to a state in which a normal water discharge amount required when one closed-type sprinkler head is opened can be supplied. Since the setting is made, it is possible to minimize the opening degree of the on-off control valve while securing a necessary water supply amount in the event of a fire, and it is possible to further reduce water loss in the event of a sprinkler head explosion.

Further, in the invention according to claim 3 or 7, when the flowing water detecting means detects flowing water in a state where the fire detector does not detect a fire, the opening and closing control is performed after a lapse of a predetermined time from the detection of the flowing water. Since the valve is closed, the fire can be reliably extinguished even when a fire occurs immediately below the closed sprinkler head and the closed sprinkler head is activated earlier than the fire detector.

In the invention according to claim 4 or 8, when the flowing water detecting means detects flowing water, the open / close control valve is half-closed, and in this state, the fire detector does not detect a fire for a predetermined time. Since the on-off control valve is closed after the lapse of time, the water loss at the time of the sprinkler head explosion can be further reduced.

Further, in the invention according to claim 5,
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 an open state when a fire is detected by a fire detector Opened the open control valve fully or to a predetermined opening, and closed the open / close control valve when running water was detected in a state where fire was not detected, so that it was possible to respond immediately in case of fire, Even when the sprinkler head goes out of control, the time required for closing the valve is short, and water loss can be reduced. In addition, even if a failure or the like occurs in the electric system, fire extinguishing 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 a control panel in the first embodiment.

FIG. 3 is a flowchart showing a flow of processing of a control panel according to a second embodiment.

FIG. 4 is a system diagram of another embodiment of the present invention.

FIG. 5 is a flowchart showing a flow of a process of a control panel according to a third embodiment.

FIG. 6 is a flowchart showing a flow of processing of a control panel according to a fourth embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Closed sprinkler head 2 Secondary piping 3 Running water detection device 4 Opening / closing control valve 5 Primary piping 8 Fire detector 9 Control panel

Claims (8)

[Claims] 1. A closed sprinkler head attached to a distal end side of a water supply pipe, a fire detector installed in a protection area where the closed sprinkler head is installed and detecting a fire, and a fire detector installed in the water supply pipe. A water flow detecting means for detecting flowing water in the water supply pipe, and an opening / closing control valve provided in the water supply pipe and normally maintaining a half-open state, and when the fire detector detects a fire, The on-off control valve is fully opened or opened to a predetermined opening, and the on-off control valve is closed when the flowing water detecting means detects flowing water in a state where the fire detector does not detect a fire. Features sprinkler fire extinguishing equipment. 2. The normal half-open state of the on-off control valve is set to a state in which a normal water discharge amount required when one of the closed type sprinkler heads is opened can be supplied. Item 1. A sprinkler fire extinguishing system according to Item 1. 3. When the flowing water detecting means 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 passed since the flowing water detecting means detected flowing water. 2. The method according to claim 1, wherein
Or the sprinkler fire extinguishing equipment according to 2. 4. When the flowing water detecting means detects flowing water, the open / close control valve is set to a half-closed state, and in this state, the open / close control valve is closed when a predetermined time elapses without a fire detector detecting a fire. The sprinkler fire extinguishing equipment according to claim 1, wherein the fire extinguishing is performed. 5. A closed sprinkler head attached to a distal end of a water supply pipe, a fire detector installed in a protection area where the closed sprinkler head is installed, and detecting a fire; and a fire detector installed in the water supply pipe. Flowing water detecting means for detecting flowing water in the water supply pipe, an open control valve provided in the water supply pipe and normally maintaining a closed state, and installed in parallel with the open control valve, Is provided with an open / close control valve that maintains an open state. When the fire detector detects a fire, the open control valve is fully opened or opened to a predetermined opening, and the fire detector detects a fire. A sprinkler fire extinguishing system wherein the on-off control valve is closed when the flowing water detecting means detects flowing water in a state where the water is not flowing. 6. The open / close control valve is made smaller than the open control valve, and a normal open state of the open / close control valve is required when one of the closed sprinkler heads is opened. The sprinkler fire extinguishing system according to claim 5, wherein the sprinkler is set to a state in which a regular amount of water can be sent. 7. When the flowing water detecting 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 passed since the flowing water detecting means detects flowing water. The sprinkler fire extinguishing equipment according to claim 5 or 6, wherein the fire extinguishing equipment is provided. 8. When the flowing water detecting means detects flowing water, the open / close control valve is set to a half-closed state. In this state, the open / close control valve is closed when a predetermined time has elapsed without the fire detector detecting a fire. 7. The sprinkler fire extinguishing system according to claim 5, wherein the sprinkler is fired.