JP2010069066A - Pre-action fire-extinguishing system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pre-action fire extinguishing system which can suppress the delay of water spraying of water for fire extinguishing to the minimum, and can reduce an introduction expense. <P>SOLUTION: The pre-action fire extinguishing system 100 includes a water supply main pipe 1 which becomes a primary side piping, a secondary side piping arranged in an alert section 30, a flowing water detector 2 installed between the water supply main pipe 1 and the secondary side piping, a normally closed opening/closing valve 4 connected to the secondary side of the flowing water detector 2, a head 6 connected to a plurality of sections of the secondary side piping via the opening/closing valve 4, a fire sensor 7 installed in the alert section 30, and a control part for opening the opening/closing valve 4 at least when the fire sensor 7 is operated. The fire sensor 7 has a higher sensitivity than the sensitivity normally demanded in the alert section 30, or is installed more densely than the arrangement normally demanded in the alert section 30. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a pre-acting fire extinguishing equipment that is disposed on a part of a floor of an office building and requires water damage prevention measures, for example, installed in a server room or the like.

  Conventional pre-actuated sprinkler equipment is provided with an open valve called pre-actuation valve in the middle of the water supply pipe connected to the fire-extinguishing water tank. The primary side of the water supply pipe is filled with high-pressure fire-extinguishing water, and the secondary side Is equipped with a closed sprinkler head at the tip of the secondary side with sealed pressurized air, and a fire detector in addition to the closed sprinkler head.

  Then, the open valve is opened by the operation of the fire detector due to a fire, the fire extinguishing water is filled up to the closed sprinkler head, and the closed sprinkler head is opened by the heat of the fire to discharge water.

However, for example, even if a fire occurs immediately below the closed sprinkler head and the closed sprinkler head opens, the release valve does not open until the fire detector is activated, causing a delay in water discharge for fire extinguishing. there is a possibility.
Japanese Patent No. 3610468

  In conventional pre-actuated sprinkler equipment, the number of simultaneous opening of the pre-actuated sprinkler equipment, the pump discharge amount, and the amount of water source are 1 for wet sprinkler equipment in order to secure fire extinguishing suppression performance in anticipation of water discharge delay. In addition to making it 5 times, it was necessary to increase the pipe diameter. In addition, when the pre-actuated sprinkler equipment is arranged on a part of the same floor as the warning section by the wet sprinkler equipment, a running water detector and a dedicated pipe are installed on both sides. Therefore, the introduction cost of fire extinguishing equipment was high.

  It is an object of the present invention to provide a pre-acting fire extinguishing facility that can minimize the delay of water discharge for fire extinguishing water and can reduce the introduction cost.

  The pre-acting fire extinguishing equipment according to the present invention is installed between a water supply main pipe serving as a primary side pipe, a secondary side pipe disposed in a warning zone, and the water supply main pipe and the secondary side pipe. And a normally closed on-off valve connected to the secondary side of the water-flow detecting device, a head connected to a plurality of locations of the secondary-side piping via the on-off valve, and the warning section In a pre-acting fire extinguishing system comprising an installed fire sensor and at least a control unit that opens the on-off valve when the fire sensor is activated, the fire sensor has a sensitivity normally required in the warning section. It is characterized by being installed more densely or more densely than the arrangement normally required in the warning section.

  Further, the pre-acting fire extinguishing equipment according to the present invention includes a water supply main pipe serving as a primary side pipe, a secondary side pipe disposed in a warning section, and the water supply main pipe and the secondary side pipe. An installed running water detection device, a normally closed on-off valve connected to the secondary side of the running water detection device, a head connected to a plurality of locations of the secondary side pipe via the on-off valve, and the warning In a pre-acting fire extinguishing equipment comprising a fire detector installed in a compartment and a controller that opens at least the on-off valve when the fire detector is activated, the head has a sensitivity normally required in the warning compartment It is characterized by being installed more densely or more densely than the arrangement normally required in the warning section.

  Further, the pre-acting fire extinguishing equipment according to the present invention includes a water supply main pipe serving as a primary side pipe, a secondary side pipe disposed in a warning section, and the water supply main pipe and the secondary side pipe. An installed running water detection device, a normally closed on-off valve connected to the secondary side of the running water detection device, a head connected to a plurality of locations of the secondary side pipe via the on-off valve, and the warning In the pre-acting fire extinguishing equipment that provides a fire detector installed in a compartment and at least a control unit that opens the on-off valve when the fire detector is activated, the pipe internal volume on the secondary side of the on-off valve is: It is limited by the volume normally required in the warning section.

  Moreover, the wet fire extinguishing equipment having another head is further branched from the secondary side pipe and arranged in parallel in another warning section.

  Further, the pre-acting fire extinguishing equipment according to the present invention includes a water supply main pipe serving as a primary side pipe, a secondary side pipe disposed in a warning section, and the water supply main pipe and the secondary side pipe. An installed running water detection device, a normally closed on-off valve connected to the secondary side of the running water detection device, and a first head connected to a plurality of locations of the pre-acting piping via the on-off valve In the pre-acting fire extinguishing equipment provided with a fire detector installed in the warning section and a control unit that opens the on-off valve when at least the fire detector is activated, the secondary side pipe is branched, and is wet A fire extinguisher having a second head juxtaposed to another warning zone through a piping for a fire, and a fire detector installed in the other warning zone, and a fire installed in the warning zone The detector and the first head are fires installed in the separate warning area. From knowledge unit and the second head, it is characterized in that it is installed sensitive or densely.

  The effect of the pre-acting fire extinguishing system according to the present invention is that the fire detector and the sprinkler head are operated quickly in the event of a fire, or the pipe internal volume on the secondary side of the on-off valve is limited. Therefore, the delay in water discharge can be minimized.

  In addition, the number of sprinkler heads that can be opened simultaneously, the pump discharge amount, the amount of water source water, the pipe diameter, etc. can be the same as the wet sprinkler equipment.

  Further, when the pre-actuated sprinkler fire extinguishing equipment is arranged on a part of the same floor as the warning section by the wet sprinkler equipment, the running water detection device and the piping can be shared.

Embodiment 1
FIG. 1 is a system diagram of a pre-acting fire extinguishing system according to Embodiment 1 of the present invention. As shown in FIG. 1, the pre-acting fire extinguishing equipment 100 is supplied with water by a pump from a water source (not shown), and detects flowing water from the water supply main 1 that forms the primary side piping and the water supply main 1 to the secondary side piping 3 Opening / closing control is performed by a control panel 8 and a flow detection device 2 that sometimes outputs a flow signal, a secondary pipe 3 disposed between the secondary side of the flow detection device 2 and the primary side of the on-off valve 4. For example, the on-off valve 4 such as a simultaneous opening valve and the pre-operating type that is disposed in the pre-operating warning section 30 and that is connected to the secondary side of the on-off valve 4 and is pre-filled with water or air. For example, a head 6 such as a sprinkler head connected to the pre-operating pipe 5 and a fire detector 7 such as a smoke detector installed in the pre-operating warning section 30. , A control panel 8 to which a fire signal is transmitted from the fire detector 7 when a fire is detected, and a wet alarm Installed in the area 40, the wet pipe 31 branched from the secondary pipe 3, the head 32 such as a sprinkler head connected to the wet pipe 31, and the wet alert section 40. For example, it includes a fire detector 33 such as a smoke detector, a terminal test valve 9 for an actual water discharge test provided at a terminal portion of the wet piping 31, and an orifice 10.

  The fire detector 7 in the pre-operating warning section 30 is, for example, a higher sensitivity type than that normally required by the installation standards defined by the Fire Service Act, or is installed more densely than the normally required arrangement. Reduce the sensing area per fire detector. Thereby, the fire detector 7 can detect a fire early at the time of an initial fire. Similarly, for the head 6 of the pre-operated warning section 30, for example, a higher sensitivity type is used than the sensitivity normally required by the installation standards stipulated by the Fire Service Act, or the head 6 is installed more densely than the normally required arrangement. The protection area per head is reduced. Thereby, since the head 6 can start water discharge before a fire expands, it can extinguish a fire source reliably.

  Here, the specific example in installation of the fire detector 7 and the head 6 is shown. When it is required that two types of sensitivity (nominal operating concentration: 10% / m) are normally installed on the fire prevention object in the pre-operating warning area 30, one type of photoelectric sensor is required. Install 1 to 5 sensitivities (nominal working concentration: 5% / m). In addition, when it is required to normally install one type of sprinkler head sensitivity (effective water spray radius: 2.3 m) on the fire prevention object, one type of sprinkler head sensitivity (effective water spray radius: 2.6 m) 1 to 5 are installed. Note that the type, sensitivity, number of installations, etc. of the fire detector and the head are optimized in consideration of the usage, layout, etc. of the pre-actuated warning section 30.

  Further, the pre-actuated pipe 5 connected to the secondary side of the on-off valve 4 has a limited pipe internal volume, for example, the pipe length is shortened or the pipe diameter is reduced. After opening the on-off valve 4, the water filling is completed promptly. The water can be discharged immediately by the operation of the head 6. The internal volume of the pipe is obtained by a fire extinguishing experiment or the like assuming a fire in the pre-operating warning section 30.

  It is only necessary to use at least one of the use of the high-sensitivity products of the fire detector 7 and the head 6 in the pre-operating warning section 30, the increase in the number of installations, and the restriction of the pipe internal volume of the pre-operating pipe 5. Moreover, you may use it combining all.

  On the other hand, the fire detector 33 or the head 32 in the wet alert section 40 is appropriately installed. Further, depending on the application, substantially the same product as the fire detector 7 or the head 6 in the pre-operating warning section 30 may be installed at approximately the same interval. The installation interval between the devices may be increased, or the installation of the fire detector 33 may be omitted.

  At the time of monitoring, in the pre-operated warning section 30, the fire detector 7 does not detect a fire and does not transmit a fire signal to the control panel 8, so the control panel 8 closes the on-off valve 4. Further, since the head 6 does not operate and does not open, the water or air in the pre-operation type pipe 5 remains sealed. Furthermore, since the flowing water detection device 2 does not detect flowing water from the water supply main pipe 1 to the secondary side pipe 3, it does not output a flowing water signal. When the head 6 is damaged by an external force, water or air in the pre-operation type pipe 5 is released.

  Similarly, the fire detector 33 in the wet alert section 40 does not detect a fire and does not transmit a fire signal to another control panel (not shown). Also, the head 32 does not operate and does not open.

  When a fire occurs in the pre-operated warning section 30, the fire detector 7 detects a fire at an initial stage and transmits a fire signal to the control panel 8. And since the control panel 8 opens the on-off valve 4 and fills the pre-actuated pipe 5 with water, the flowing water detection device 2 detects flowing water from the water supply main pipe 1 to the secondary side pipe 3 and outputs a flowing water signal. Output. And the pump which is not illustrated is started and water is supplied to the water supply main pipe 1 from a water source. Shortly thereafter, the head 6 operates to start water discharge and extinguishes the fire source.

  On the other hand, when a fire occurs in the wet alert section 40, the fire detector 33 detects the fire and transmits a fire signal to another control panel (not shown). Further, the head 32 operates to start discharging water for extinguishing fire in the secondary side pipe 3 and the wet pipe 31. And the flowing water detection apparatus 2 detects flowing water from the water supply main pipe 1 to the secondary side piping 3, and outputs a flowing water signal. And the pump which is not illustrated is started and water is supplied to the water supply main pipe 1 from a water source. And extinguish the fire source.

  According to the pre-actuated fire extinguishing equipment 100 of the present invention, the number of simultaneous plugs required by the fire extinguishing equipment, the pump discharge amount, and the amount of water source water can be equivalent to those of the wet fire extinguishing equipment, and the flowing water detection device 2 and the secondary side pipe 3 Since a part of can be shared, the introduction cost of fire extinguishing equipment can be reduced.

  As shown in FIG. 1, when the pre-operated warning section 30 and the wet warning section 40 are arranged side by side, for example, a wet sprinkler facility is installed in an office that occupies most of the same floor of an office building. If the pre-actuated sprinkler equipment is installed in the server room that occupies the space, sufficient effects can be obtained. In addition, the boundary of both warning sections does not need to be completely partitioned off by a wall surface.

  In addition to the server room, it can also be used for small and important applications such as a library, a valuable room, and a VIP room. Here, the VIP room includes not only an office boardroom (board room) in the office, but also a purpose of providing high-class services to users in accommodation facilities, restaurants, beauty facilities, amusement facilities, etc. It is.

  For example, a conshielded head may be used as the head 6, and the control panel 8 may open the release valve 4 by AND input of the concealed part falling signal due to a fire and the fire signal of the fire detector 7.

  Each head may be a foam head instead of a sprinkler head, and can be used in various applications.

  Moreover, even if the pre-operation type fire extinguishing equipment 100 is provided with the pre-operation type warning section 30 independently, the same effect is obtained. In addition, a plurality of pre-operating warning sections (not shown) may be provided side by side.

Embodiment 2
In the second embodiment, the pre-actuating type pipe 5 connected to the secondary side of the on-off valve 4 is limited in volume in the pipe as in the first embodiment. On the other hand, for the fire detector 33 and the head 32 in the wet alert section 40, for example, the sensitivity and the equivalent that are normally required by the installation standards defined by the Fire Service Act, or the like, or the arrangement that is normally required are used. That is, compared with the fire detector 7 and the head 6 in the pre-operating warning section 30, a low sensitivity type is used or is roughly installed. Note that only one of the fire detector 33 and the head 32 in the wet alert section 40 may be used.

Therefore, for example, when the pre-operating warning section 30 and the wet warning section 40 are provided side by side, the former can reliably detect the initial fire, so that the water discharge delay can be sufficiently reduced. Furthermore, it is possible to prevent an excessive facility.

It is a systematic diagram of the pre-operation type fire extinguishing equipment in the present invention.

Explanation of symbols

1 Water supply main, 2 Flow detection device, 3 Secondary pipe, 4 Open / close valve, 5 Pre-actuated pipe, 6 Head, 7 Fire detector, 8 Control panel, 9 Terminal test valve, 10 Orifice, 30 Pre-act Type warning zone, 31 Wet piping, 32 heads, 33 Fire detector, 40 Wet warning zone, 100 Pre-acting fire extinguishing equipment.

Claims (5)

A water supply main pipe serving as a primary side pipe, a secondary side pipe disposed in a warning area, a water flow detection device installed between the water supply main pipe and the secondary side pipe, and A normally-closed on-off valve connected to the secondary side, a head connected to a plurality of locations of the secondary-side piping through the on-off valve, a fire detector installed in the warning area, and at least the fire In the pre-acting fire extinguishing equipment that provides a control unit that opens the on-off valve when the sensor is activated,
The pre-actuated fire extinguishing equipment, wherein the fire detector is more sensitive than the sensitivity normally required in the warning section, or is installed more densely than the layout normally required in the warning section. A water supply main pipe serving as a primary side pipe, a secondary side pipe disposed in a warning area, a water flow detection device installed between the water supply main pipe and the secondary side pipe, and A normally-closed on-off valve connected to the secondary side, a head connected to a plurality of locations of the secondary-side piping through the on-off valve, a fire detector installed in the warning area, and at least the fire In the pre-acting fire extinguishing equipment that provides a control unit that opens the on-off valve when the sensor is activated,
The pre-acting fire extinguishing equipment is characterized in that the head has a higher sensitivity than that normally required in the warning section, or is installed more densely than an arrangement normally required in the warning section. A water supply main pipe serving as a primary side pipe, a secondary side pipe disposed in a warning area, a water flow detection device installed between the water supply main pipe and the secondary side pipe, and A normally-closed on-off valve connected to the secondary side, a head connected to a plurality of locations of the secondary-side piping through the on-off valve, a fire detector installed in the warning area, and at least the fire In the pre-acting fire extinguishing equipment that provides a control unit that opens the on-off valve when the sensor is activated,
The pre-actuated fire extinguishing equipment, wherein the secondary pipe internal volume of the on-off valve is limited by the volume normally required in the warning section.   4. The pre-actuated type according to claim 1, wherein a wet fire extinguishing apparatus having another head is further branched from the secondary side pipe and arranged in parallel in another warning section. Fire extinguishing equipment. A water supply main pipe serving as a primary side pipe, a secondary side pipe disposed in a warning area, a water flow detection device installed between the water supply main pipe and the secondary side pipe, and A normally closed on-off valve connected to the secondary side, a first head connected to a plurality of locations of the pre-actuated piping via the on-off valve, a fire detector installed in the warning zone, In a pre-acting fire extinguishing equipment that provides at least a control unit that opens the on-off valve when the fire detector is activated,
A wet fire extinguishing equipment having a second head branched from the secondary side pipe and arranged in parallel in another warning section through a wet pipe; and a fire detector installed in the other warning section, Prepared,
The fire detector and the first head installed in the alert zone are more sensitively or densely installed than the fire detector and the second head installed in the other alert zone. Pre-acting fire extinguishing equipment.

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