Fire suppression system

Abstract

To provide a fire-extinguishing system having a simple configuration suitable for extinguishing a fire generated in a material storage site.SOLUTION: A fire-extinguishing system includes a foam fire extinguisher 30 for releasing foam toward a fire occurrence monitoring object to extinguish the fire, and banking means 50 formed higher than the height of the monitoring object, provided around the monitoring object, and preventing the foam from flowing outside of a surrounding area, where the monitoring object is made of a box-like container for storing materials, waste or the like. When the fire-extinguishing system further includes a sensor 20 for outputting a fire signal when sensing a fire occurring in the monitoring object, the foam fire extinguisher 30, upon receiving the fire signal from the sensor 20, releases the foam toward the monitoring object.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present disclosure relates to a fire extinguishing system using a foam fire extinguishing device. [Background technology]

[0002] For example, in buildings under construction, it is common to set up temporary material storage areas, waste storage areas called industrial waste yards, etc. In the following explanation, such storage areas are collectively referred to as material storage areas. There have been cases where fires have actually occurred in temporary material storage areas set up during construction, and so there is growing interest in disaster prevention measures for such material storage areas.

[0003] The material storage area during the construction of a building is not necessarily indoors, but may be set up, for example, in a temporary outdoor location. Possible causes of fires in material storage areas include arson and careless handling of ignition factors during construction work.

[0004] As an example of a conventional technology for detecting arson, there is an arson detection system as follows (see, for example, Patent Document 1). The system according to Patent Document 1 includes a flame sensor having a flame detection unit, a human body sensor having a human body detection unit, a sensitivity setting unit that sets the sensitivity of the flame detection unit, a transmitting unit that transmits an intrusion signal when the human body detection unit detects a human body, and a receiving unit that receives the intrusion signal.

[0005] The system according to Patent Document 1 controls the sensitivity of the sensitivity setting unit to switch to high sensitivity when an intrusion signal is received. If a flame is detected by the flame sensor, a fire signal is wirelessly transmitted to the receiver, and the receiver, having received the fire signal and the intrusion signal, determines that arson has occurred and transfers the arson signal to a mobile terminal.

[0006] As a result, even if the device is installed outdoors with the sensitivity normally set to low, false alarms caused by sunlight and other factors are reduced, and the manager carrying the mobile device is quickly notified that a fire has been detected. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] JP 2004-303093 A Summary of the Invention [Problem to be solved by the invention]

[0008] However, the conventional techniques have the following problems. As mentioned above, the material storage area of ​​a building under construction may be set up in a temporary outdoor location, and once the construction work is completed, the material storage area will be removed or moved, eliminating the need for fire detection at the original temporary location. Therefore, unlike the case of constantly monitoring fires in normal buildings, it is important that the device has a simple configuration that allows for easy installation and removal.

[0009] Furthermore, even if the fire monitoring target is a temporary installation, if a fire occurs in a place such as a material storage yard of a building under construction as described above, it is possible that a great deal of damage will occur in terms of money and construction time. Therefore, there is a strong demand for the establishment of a fire extinguishing system having a configuration that can more reliably extinguish a fire even if it occurs in a material storage yard.

[0010] However, the system disclosed in Patent Document 1 does not specifically disclose how to extinguish a fire after the fire has started.

[0011] The present disclosure has been made to solve the above-mentioned problems, and aims to provide a fire extinguishing system having a simple configuration suitable for extinguishing a fire that occurs in a monitored area. [Means for solving the problem]

[0012] The fire extinguishing system according to the present disclosure includes a foam extinguishing device that extinguishes a fire by releasing foam toward a target to be monitored for the occurrence of a fire, and a damming means that is higher than the height of the target to be monitored and is provided around the target to prevent the foam from flowing out beyond the periphery, and the target to be monitored is a box-shaped container for storing materials, waste, etc. A fire extinguishing system, in which the damming means is provided higher than the height of the container, and the foam extinguishing device is provided at a position higher than the damming means. It is something. Effect of the Invention

[0013] According to the present disclosure, it is possible to obtain a fire extinguishing system having a simple configuration suitable for extinguishing a fire that occurs in a monitored object. [Brief description of the drawings]

[0014] [Figure 1] 1 is an overall configuration diagram of a fire extinguishing system according to a first embodiment of the present disclosure. [Diagram 2] FIG. 2 is an explanatory diagram showing a specific configuration of a blocking means in the first embodiment of the present disclosure. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0015] Hereinafter, preferred embodiments of the fire extinguishing system of the present disclosure will be described with reference to the drawings. The fire extinguishing system disclosed herein has a technical feature that, when using a foam fire extinguishing device to extinguish a fire at a monitored object such as a material storage yard, a simply configured damming means is provided around the monitored object, and the foam remains inside the damming means, thereby improving the extinguishing efficiency of the monitored object.

[0016] Embodiment 1 FIG. 1 is an overall configuration diagram of a fire extinguishing system according to a first embodiment of the present disclosure. FIG. 1 illustrates an example in which a material storage yard 1 temporarily installed outdoors during the construction of a building is set as a target for monitoring for the occurrence of a fire. A representative example of the material storage yard 1 is an industrial waste yard that is installed outdoors of a building under construction and stores materials for disposal. Here, the industrial waste yard is sometimes called an industrial waste container, and is composed of a box-shaped container, and may contain waste generated during construction work as well as other items other than materials.

[0017] The fire extinguishing system according to the first embodiment shown in FIG. 1 includes a structure 10, a smoke detector 20, a foam fire extinguishing system 30, a controller 40, and a damming means 50.

[0018] The structure 10 comprises a roof 11 that can be temporarily installed above the material storage yard 1, and supports 12 that support the roof 11, and what is generally called a pipe tent can be used. Note that the roof 11 can also be configured with a hanging wall (not shown) added to the end of the roof 11 as a smoke retention shape to obtain the effect of retaining smoke generated in the material storage yard 1.

[0019] During the construction of a building, a structure 10 having a roof 11 can be easily temporarily installed using supports 12 on a material storage yard 1 that is temporarily installed outdoors. By temporarily installing such a structure, smoke generated in the material storage yard 1 moves upward and remains on the roof 11. Here, "temporarily installing a structure" means that the structure can be easily assembled in a short time, and after use is finished, the structure can be easily dismantled and returned to its original empty state.

[0020] A smoke detector 20 is installed on the roof 11 as a fire detector that outputs a fire signal when it detects smoke in the material storage yard 1 to be monitored. As the smoke detector 20, for example, a spot-type smoke detector that can adjust the sensitivity in multiple stages can be used. This spot-type smoke detector 20 is resistant to dust, and can suppress false detections caused by dust even when installed outdoors.

[0021] Although not shown in the figure, a highly sensitive smoke detector can also be used that outputs a fire signal when it detects the occurrence of smoke in the monitored material storage yard 1. The highly sensitive smoke detector can be, for example, a type of smoke detector that uses a sampling tube with many sampling holes to constantly suck in air stagnating in the roof through the many sampling holes and optically monitors the environmental air in the entire area.

[0022] Although this high-sensitivity smoke detector is not as resistant to dust as smoke detector 20, it has a wider sensitivity setting range than smoke detector 20 and can be set to detect smoke with higher sensitivity than smoke detector 20. However, when used at high sensitivity, there are more false positives, especially when the detector is used outdoors, so it is desirable to use the high-sensitivity smoke detector with a sensitivity setting slightly higher than that of the low-sensitivity smoke detector 20 (class 3 sensitivity).

[0023] Therefore, with the minimum configuration of installing the smoke detector 20 on the roof 11, smoke occurring in the material storage yard 1 can be detected. Furthermore, by combining the smoke detector 20 with a high-sensitivity smoke detector and configuring the detector to detect smoke when both the smoke detector 20 and the high-sensitivity smoke detector are activated, it is possible to achieve dust-resistant and highly accurate smoke detection. Furthermore, the fire detector may not only be a smoke detector, but also a flame detector, for example an infrared three-wavelength flame detector or other detection means.

[0024] The configuration in Fig. 1 illustrates a case where a foam fire extinguishing device 30 that extinguishes a fire by discharging foam toward a material storage yard 1 that is the object of monitoring is installed in a controller 40. The foam fire extinguishing device 30 is a device that discharges foam to extinguish a fire that has broken out within a protected area (i.e., within the object of monitoring). It is preferable that the foam discharged is a highly expanding foam with a large foaming ratio.

[0025] To explain the foam fire extinguishing system 30 in more detail, the foam fire extinguishing system 30 is installed at a position higher than the damming means 50 using a mounting base or the like not shown, and is installed in a position such that, when foam is released, the foam enters the box-shaped container that constitutes the material storage area 1.

[0026] 1 shows only the portion that emits foam, but a foam solution obtained by mixing a foam concentrate and water is supplied to the foam extinguishing device 30 via a pump through piping. When the pump starts, the supplied foam solution is fed toward a foaming net (not shown) provided at the tip of the device, and foam is continuously emitted from the foaming net.

[0027] Here, instead of a pump, a gas cylinder such as nitrogen may be used as a means for supplying the foam water solution to the foam extinguishing system 30, and the foam water solution may be supplied by the pressure inside the gas cylinder. Using a gas cylinder is more effective in terms of installation and removal at construction sites. In addition, in the case of buildings under construction, it is often not possible to obtain commercial power, so it is preferable to use a gas cylinder that can supply the foam water solution without a power source as a supply means.

[0028] The foam fire extinguishing system 30 is not limited to being installed as shown in Fig. 1. For example, if the material storage yard 1 is located adjacent to the wall of a building, a configuration can be adopted in which the foam fire extinguishing system 30 is installed on the wall. In this case, the above-mentioned pump, gas cylinder, and the like that constitute part of the foam fire extinguishing system 30 are provided inside the building under construction, and the foam fire extinguishing system 30 can be installed using the framework of the building, so that the installation of the system is stable.

[0029] The controller 40 controls the foam fire extinguishing system 30 based on the fire signal output from the smoke detector 20. Specifically, when the smoke detector 20 is activated and the controller 40 receives the fire signal output from the smoke detector 20, the controller 40 outputs a foam discharge command to the foam fire extinguishing system 30 (including the pump) to discharge foam toward the material storage area 1.

[0030] The controller 40 can execute an alarm process to notify the occurrence of a fire when it receives a fire signal output from the smoke detector 20. Here, the alarm process means to notify the possibility of a fire occurrence by activating an alarm device having a buzzer or the like (not shown).

[0031] Furthermore, the fire extinguishing system according to the first embodiment has a technical feature in that a damming means 50 is provided in order to increase the efficiency of extinguishing a fire that has broken out in the material storage yard 1 by the foam discharged from the foam extinguishing device 30. The damming means 50 will now be described in detail with reference to FIG.

[0032] Fig. 2 is an explanatory diagram showing a specific configuration of the damming means 50 in the first embodiment of the present disclosure. Fig. 2(A) is a cross-sectional view for explaining the positional relationship between the material storage yard 1 and the damming means 50. Fig. 2(B) is a top view for explaining the positional relationship between the material storage yard 1 and the damming means 50.

[0033] As shown in Fig. 2(A), the damming means 50 has a height H1 that is higher than the height H2 of the material storage yard 1 to be monitored. Furthermore, as shown in Fig. 2(B), the damming means 50 is provided around the material storage yard 1 to be monitored. The reason for making H1>H2 is that there is a possibility that materials placed in the material storage yard 1 may protrude higher than the height H2 of the material storage yard 1.

[0034] Therefore, by providing the damming means 50 so as to have such a height relationship, the foam discharged from the foam fire extinguishing device 30 toward the material storage yard 1 enters and accumulates inside the box-shaped container that constitutes the material storage yard 1. The foam that overflows from the container develops so as to spread outward, but it is prevented from flowing out to the outside of the damming means 50, and it becomes possible to cover the materials placed in the material storage yard 1 with foam.

[0035] In other words, by providing the damming means 50, the foam released into the material storage yard 1 remains inside the damming means 50, making it possible to more effectively cover a fire that has broken out in the material storage yard 1 with foam in a shorter time, thereby improving fire extinguishing efficiency. Since the height of the damming means 50 is higher than the material storage yard 1, even if materials such as wood protrude from the top surface of the material storage yard 1, as long as the materials are lower than the height of the damming means 50, the material storage yard 1 will be completely filled with the accumulated foam, and the fire will be extinguished by suffocation.

[0036] As the damming means 50, various materials capable of damming up foam, such as metal materials, steel plates, sheet-like members, and resin materials, can be used. In addition, materials other than mesh-like materials can be used as the damming means 50 as long as they can dam up foam. When the foam discharged from the foam extinguishing device 30 is a high-expansion foam, even a damming means 50 with openings such as wire mesh can adequately dam up the foam. When a steel plate is used as the damming means 50, it is possible to dam up even low-expansion foam that is discharged.

[0037] 2(B), a door 51 is provided as an openable / closable structure in a portion of the damming means 50. By opening the door 51, the work of carrying materials into the material storage yard 1 and the work of removing materials from the material storage yard 1 can be facilitated.

[0038] 2(B) illustrates a state in which the damming means 50 arranged around the material storage yard 1 is installed at a position separated by distances W1 to W4 from the material storage yard 1. The greater the distance W, the greater the space between the material storage yard 1 and the damming means 50, and the longer it takes for the foam to build up. As a result, the greater the distance W, the longer it takes for the foam to build up in the material storage yard 1, which may cause a delay in extinguishing the fire.

[0039] On the other hand, distance W must be the minimum distance necessary for efficient work, from the viewpoint of the work of carrying materials into material storage yard 1 and the work of removing materials from material storage yard 1. Considering the trade-off between the speed of extinguishing and the improvement of work efficiency, it is therefore desirable to provide damming means 50 for material storage yard 1 so that each of distances W1 to W4 is within the range of 0.3 m to 1.0 m.

[0040] When any side of the material storage yard 1 is arranged adjacent to a building wall or the like, the distance W for that adjacent side will be close to 0 m. In other words, it is not necessary to set the distance W in the range of 0.3 m to 1.0 m on all sides of the material storage yard 1, but it is preferable to set the distance W in the range of 0.3 m to 1.0 m on the side where workers access the material storage yard 1 to make it easy for people to pass through.

[0041] In other words, as long as there is a distance W to the damming means 50 only on the front side of the material storage area 1, where the door 51 serving as an opening and closing means is located, and materials, waste garbage, etc. can be put in and taken out of the material storage area 1, the distance W to the damming means 50 on the side and back of the material storage area 1 can be 0 m.

[0042] The damming means 50 described with reference to FIG. 2 can be easily assembled in a short time, and after use can be easily disassembled and returned to its original empty state, making it a suitable structure for temporary installation.

[0043] The effects of the fire extinguishing system according to the first embodiment described above can be summarized as follows. <Effect 1: Improved fire extinguishing efficiency with foam> The minimum configuration is that a damming means that is higher than the height of the monitored object is installed around the monitored object, and foam discharged toward the monitored object stays inside the damming means. As a result, the monitored object can be covered with foam in a shorter time, suppressing the spread of smoke and improving fire extinguishing efficiency. In addition, by minimizing the spread of smoke outside the fire extinguishing area, it is also possible to achieve the effect of making it easier to respond to fires and evacuate.

[0044] When extinguishing a fire by spraying water, the water spreads outside the monitored area, and depending on the fire situation, such as an oil fire, rapid extinguishing may not be possible, and a large amount of water may be required. In contrast, the fire extinguishing system according to the first embodiment is provided with a configuration that combines a foam fire extinguishing device and a damming means, thereby improving the extinguishing efficiency of the foam fire extinguishing device, and ensuring that fires in the material storage yard, whether they are normal fires or oil fires, can be extinguished quickly.

[0045] <Effect 2: Achieving both rapid extinguishing and improved work efficiency> By providing a gap of 0.3 m to 1.0 m between the damming means installed around the object to be monitored and the object to be monitored, it is possible to achieve both rapid extinguishing and improved work efficiency. Also, it is not essential to provide gaps all around, and it is sufficient to set the distance in the range of 0.3 m to 1.0 m on the surface where workers access the material storage area 1. Furthermore, by providing an openable door on part of the damming means, it is possible to facilitate the work of bringing in and removing the material.

[0046] <Effect 3: Linked with sensors> A foam fire extinguishing system may be manually operated, but by linking it to a smoke detector, etc., foam fire extinguishing operations can be automated without human intervention.

[0047] In particular, at construction sites, it is conceivable that a material storage yard will be temporarily set up outdoors or in a place with a high ceiling. It is also conceivable that the location of the material storage yard will be moved depending on the progress of the construction. In this case, the structure 10 and the damming means 50 can be dismantled, and the structure 10 and the damming means 50 can be reassembled and temporarily set up in accordance with the new location. Therefore, it is possible to easily provide a fire extinguishing system suitable for construction sites and the like.

[0048] The respective arrangements of the smoke detector 20 and the foam fire extinguishing system 30 are not limited to the layout shown in Fig. 1. The smoke detector 20 can be arranged at a desired location suitable for detecting smoke generated in the monitored object or a temperature above a threshold. The foam fire extinguishing system 30 can be arranged at a desired location suitable for foam extinguishing depending on the size, height, installation location, etc. of the monitored object.

[0049] In the above-mentioned first embodiment, a material storage yard during construction of a building has been described as a specific example of a "subject to be monitored for the occurrence of a fire", but the "subject to be monitored for the occurrence of a fire" in the present application is not limited to such a material storage yard at a construction site. For example, material storage yard other than a construction site, an area to be monitored for the occurrence of a fire at an outdoor event, and other monitored subjects to which a configuration combining a foam fire extinguishing device and a damming means can be applied are included in the "subject to be monitored for the occurrence of a fire" in the present application.

[0050] Although the above description is based on the case where the material storage area is provided outdoors, outside the building under construction, this embodiment can also be applied to cases where the material storage area is provided indoors. In the case of indoors, a building under construction does not have a smoke exhaust system, and there is a possibility of being covered in smoke, so as a countermeasure, the foam fire extinguishing device of the present invention may be provided as a fire extinguishing device for indoor use that can be easily installed and removed.

[0051] In the embodiment, the material storage area is, as an example, composed of a box-shaped container, and the foam is poured into the container from the foam extinguishing device. However, when there is a large amount of materials or waste and they cannot be contained in the container, the materials or waste may be placed in front of the container. In such a case, when materials outside the container ignite and a fire occurs, it is more desirable to release foam between the material storage area and the damming means than to pour foam into the container from the foam extinguishing device. For this reason, the foam extinguishing device may be provided with a deflector mechanism that can manually switch the direction of foam release, so that the foam can be selectively released either into the container or outside the container. [Explanation of symbols]

[0052] 1 material storage area, 10 structure, 11 roof section, 12 support, 20 smoke detector, 30 foam extinguishing system, 40 controller, 50 blocking means, 51 door.

Claims

1. A foam extinguishing device that extinguishes a fire by releasing foam toward a target for monitoring a fire; a damming means that is provided around the monitoring target and is higher than the height of the monitoring target, and prevents the bubbles from flowing out beyond the periphery; The fire extinguishing system includes a box-shaped container for storing materials, waste, etc., The damming means is provided higher than the height of the container, The foam extinguishing device is installed at a position higher than the damming means. Fire extinguishing system.

2. The damming means has a structure that allows temporary installation.

2. The fire suppression system of claim 1.

3. The blocking means is made of a mesh-like material capable of blocking the bubbles, or a material having openings capable of blocking the bubbles.

3. A fire extinguishing system according to claim 1 or 2.

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