Sprinkler fire-fighting equipment

Abstract

To provide sprinkler fire-fighting equipment capable of releasing water at a higher flow rate, when a fire spreads.SOLUTION: Sprinkler fire-fighting equipment (1) comprises: a closed type head (13); an open type head (14) that releases water at a higher flow rate than the closed type head (13); and a head connection part (15) that connects the open type head (14) and the closed type head (13) together while communicating an outflow port of the open type head (14) with an inflow port of the closed type head (13).SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a sprinkler fire extinguishing system. [Background technology]

[0002] Sprinkler fire extinguishing equipment automatically sprays water from sprinkler heads installed on the ceiling or other parts of a fire-prevention object to extinguish a fire when it occurs, and is primarily installed for the purpose of extinguishing a fire in its early stages (see, for example, Non-Patent Document 1). [Prior art documents] [Non-patent literature]

[0003] [Non-Patent Document 1] WEB Catalog "Sprinkler Equipment", Nohmi Bosai Co., Ltd., [online], [Searched on March 19, 2024], Internet<URL:https: / / www.nohmi.co.jp / webcatalog_004 / sp_de_2907 / html5.html#page=1> Summary of the Invention [Problem to be solved by the invention]

[0004] In this type of fire extinguishing equipment, the sprinkler head generally has a water discharge rate of about 80 L / min (water discharge pressure of 0.1 MPa).

[0005] However, if a fire spreads, a typical sprinkler head may not be able to spray enough water, making it difficult to extinguish the fire.

[0006] SUMMARY OF THE INVENTION In view of the above circumstances, an object of the present invention is to provide a sprinkler fire extinguishing system that can discharge a larger amount of water when a fire spreads. [Means for solving the problem]

[0007] This invention is a sprinkler fire extinguishing system characterized by comprising a closed-type head, an open-type head that sprays water at a greater flow rate than the closed-type head, and a head connecting portion that connects the open-type head and the closed-type head while communicating the outlet of the open-type head with the inlet of the closed-type head.

[0008] In this invention, the head connecting portion may be configured to fall from its installed position when heated to a predetermined temperature or higher. The head connecting portion may be formed of a material that deforms when heated to a predetermined temperature or higher. The head connecting portion may be formed of a synthetic resin material that deforms when heated to a predetermined temperature or higher. The sprinkler fire extinguishing system may be configured such that, when a fire breaks out, the closed-type head sprays water in the early stages, while the open-type head sprays water when the fire has spread to the point where the connecting member falls. The sprinkler fire extinguishing system may further include a pressurized water supply device that supplies fire extinguishing water to the closed-type head and the open-type head, and the pressurized water supply device may supply fire extinguishing water to the open-type head at a flow rate greater when the open-type head sprays water than when the closed-type head sprays water. [Effects of the Invention]

[0009] In this invention, if a fire spreads to the point where the head connector falls from its installed position due to the hot air currents and flames, the open head will start to spray water at a higher flow rate than the closed head.

[0010] Therefore, according to the present invention, it is possible to provide a sprinkler fire extinguishing system that can discharge a larger flow rate of water when a fire spreads. [Brief explanation of the drawings]

[0011] [Figure 1] 1 is a piping diagram showing an example of an embodiment of the present invention, in which an example of the overall configuration of a sprinkler fire extinguishing system is shown in simplified form. [Figure 2] This is an enlarged view of the main parts of the connected head portion of the equipment, which is formed by connecting the closed head and open head with the head connecting part. (a) shows the normal state, and (b) shows the state when the fire has spread. DETAILED DESCRIPTION OF THE INVENTION

[0012] Hereinafter, an embodiment of the present invention will be described with reference to FIGS.

[0013] The present invention can be applied to any sprinkler fire extinguishing system that uses a closed head, and can be applied to both wet and dry type systems.

[0014] [Entire equipment] Figure 1 shows an example of the overall configuration of the equipment in the case of a wet method.

[0015] As shown in Figure 1, in a sprinkler fire extinguishing system (hereinafter simply referred to as "fire extinguishing system") 1, secondary piping section 11 on the secondary side of water flow detection device 10 is provided with sprinkler piping 12 at the distal end, and a closed-type head 13 is provided on sprinkler piping 12. Furthermore, primary piping section 5 on the primary side of water flow detection device 10 is provided with a pressurized water supply device 3 at the proximal end, which supplies fire extinguishing water in a water tank 2 to secondary piping section 11. As a wet-type system, fire extinguishing water is constantly filled from the proximal end of primary piping section 5 to the distal end of secondary piping section 11, to the normally closed closed-type head 13.

[0016] In the event of a fire, when the closed-type head 13 opens, the fire extinguishing water stored in the secondary piping section 11, including the sprinkler piping 12, is released from the closed-type head 13. This causes the water flow detection device 10 to open, causing the fire extinguishing water to flow from the primary piping section 5 to the secondary piping section 11. The flowing water is detected by a water flow detection unit (e.g., a pressure switch) 10a of the water flow detection device 10 and outputs a flowing water signal. Based on the flowing water signal, an alarm (not shown) sounds to warn of a fire. In addition, a pressure detection unit 8 (e.g., a pressure tank and a pressure switch) provided in the primary piping section 5 detects a pressure drop in the piping caused by the flow of fire extinguishing water from the primary water supply piping section 5 to the secondary piping section 11 and outputs a pressure drop signal to the pump control panel 9. In response to this signal, the pump control panel 9 outputs a pump start signal to the pressurized water supply device 3, activating the device. When the pressurized water supply device 3 is activated, the fire extinguishing water in the water tank 2 is continuously supplied to the secondary side piping section 11 via the primary side piping section 5, and the closed type head 13 continuously releases the fire extinguishing water supplied via the secondary side piping section 11.

[0017] Note that the illustrated example shows a case where the closed head 13 is installed on the ceiling T, but this invention can also be applied to equipment where the closed head 13 is installed on a wall or other location other than the ceiling.

[0018] [Connected head] The sprinkler piping 12 is provided with a plurality of closed-type heads 13, some of which are provided as connecting heads 16 (see FIG. 1). Note that the connecting heads 16 may be provided on all of the closed-type heads 13.

[0019] Fig. 2 shows an enlarged view of an example of the configuration of the connecting head 16. In Fig. 2, (a) shows the normal state, and (b) shows the state when the fire has spread.

[0020] As shown in Figure 2(a), the connecting head 16 is composed of a closed head 13 located at the end, an open head 14 located on the primary side of the closed head 13 and capable of discharging water at a greater flow rate than the closed head 13, and a head connecting part 15 located between the closed head 13 and the open head 14, which connects the closed head 13 and the open head 14 while connecting the inlet 13a of the closed head 13 with the outlet 14b of the open head 14.

[0021] Here, the head connecting portion 15 connects the closed-type head 13 and the open-type head 14, and therefore functions as a support member for the closed-type head 13. In other words, the closed-type head 13 is supported by the head connecting portion 15 and installed at a predetermined position on the ceiling T.

[0022] It goes without saying that the outlet 13b of the closed-type head 13 is provided facing the protected space side, but the outlet 14b of the open-type head 14 is also provided facing the protected space side.

[0023] The connecting head 16 is connected to the sprinkler piping 12 via a joint 17 at the inlet 14a side of the open head 14, and is constantly filled with fire extinguishing water through the normally open open head 14 and the head connecting section 15 up to the normally closed closed head 13 (see Figures 1 and 2(a)). That is, like the other closed heads 13, the closed head 13 constituting the connecting head 16 also discharges the fire extinguishing water filled in the secondary piping section 11 when opened, and discharges the fire extinguishing water in the water tank 2 supplied via the primary piping section 5 and the secondary piping section 11 when the water flow detection device 10 is opened and the pressurized water supply device 3 is activated.

[0024] [Large volume water discharge function] In the case of a fire outbreak in the fire extinguishing system 1, if the fire spreads to the point where the head connecting part 15 falls from the installation position, water will be discharged from the open-type head 14. In other words, if the fire spreads, water can be discharged at a larger flow rate.

[0025] [Two-stage water discharge function] In the fire extinguishing system 1, when a fire breaks out, the closed-type head 13 sprays water in the initial stage, but when the fire has spread to the point where the head connecting member 15 falls, the open-type head 14 sprays water. In this way, the open-type head 14 can spray a large amount of water only when the fire has spread.

[0026] [Examples of each head] Conventional products can be used for both the closed-type head 13 and the open-type head 14. Regarding the water discharge rate of each, for example, a closed-type head 13 with a water discharge rate of about 80 L / min (water discharge pressure of 0.1 MPa) can be used, and for the open-type head 14, a so-called water-discharge head with a water discharge rate of about 500 L / min (water discharge pressure of 0.35 MPa) can be used.

[0027] [Example of head connection part] Falling function The head connecting part 15 can be configured to drop from its installed position when heated to a predetermined temperature or higher. By doing so, the head connecting part 15 can be configured to drop from its installed position at a predetermined stage of the progression of a fire. Specifically, in the early stages of a fire, the head connecting part 15 can remain connected to the water-spraying head 14, allowing the closed-type head 13 to continue spraying water, but when the fire has spread to a certain extent, the head connecting part 15 can drop from its installed position, exposing the open-type head 14 and switching to a state in which the open-type head 14 sprays water.

[0028] ·Falling temperature The temperature above which the head connecting part 15 must be heated before it falls can be determined by taking into consideration various conditions, such as the installation conditions, such as whether it is installed on the back of a ceiling or wall, or whether it is installed exposed in the space at the installation location, the environmental conditions of the installation location, and the operating temperature of the closed head 13.

[0029] In relation to the operating temperature of the closed-type head 13, the head connecting part 15 can be configured to fall off when heated to a temperature higher than the temperature at which the heat-sensitive element of the closed-type head 13 melts. By doing so, even if the head connecting part 15 is installed exposed to the open space of the installation location, it is possible to prevent the head connecting part 15 from falling off before the closed-type head 13 is opened.

[0030] Here, the head connecting member 15 can be installed in the space behind the ceiling T as in the illustrated example (see FIGS. 1 and 2(a)). Also, although not shown, in equipment where the closed-type head 13 is installed on a wall, the head connecting member 15 can be installed in the space behind the wall. By doing so, in the early stages of a fire, the head connecting member 15 can be prevented from being exposed to hot air currents and flames by the ceiling T or the wall. In other words, by doing so, the head connecting member 15 can be prevented from falling before the closed-type head 13 is opened.

[0031] ·Material The head connecting portion 15 can be made of a material that deforms when heated to a predetermined temperature or higher, thereby enabling a simple structure that will fall from its installation position when heated to a predetermined temperature or higher.

[0032] Specifically, the deformable material may be a material that softens, melts, or burns when heated above a predetermined temperature, and more specifically, may be a synthetic resin material that softens, melts, or burns in this manner. Specific examples of such synthetic resin materials include polyvinyl chloride (PVC) and polypropylene (PP).

[0033] When the head connecting portion 15 is formed from a material that deforms as described above, the entire head connecting portion 15 may be formed from such a material, or the entire head connecting portion 15 may be formed as a single unit, with only some parts being formed from such a material.

[0034] ·shape 2(a), the head connector 15 may have a large-diameter end on the open-type head 14 side, and the end thereof may be connected to the outer periphery of a flange 14c for connection to a fitting 17, the flange 14c having an inlet 14a formed inside the upper side of the open-type head 14, while the lower portion of the flange 14c including the outlet 14b is enclosed within the flange 14c. The end thereof on the closed-type head 13 side may have a small diameter and be connected to a pipe connector 13c on the upper side of the closed-type head 13, the pipe connector 13c having an inlet 13a formed inside the flange 14c. That is, the head connector 15 may have a funnel-like tubular shape as a whole, and may connect the water-cancelling head 14 and the closed-type head 13 with the lower portion of the flange 14c including the outlet 14b positioned inside the head connector pipe 15, which is normally filled with fire extinguishing water (or, in the case of dry-type equipment, is normally filled with pressurized air or other gas), thereby connecting the water-cancelling head 14 and the closed-type head 13, and communicating the outlet 14b of the former with the inlet 13a of the latter. This allows the open head 14 to be connected to a conventional product using the flange portion 14c, and the closed head 13 to be connected to a conventional product using the piping connection portion 13c.

[0035] Connection method Furthermore, the connection method for each connecting part can be by screw. In this case, specifically, for example, the connecting part of the open-type head 14 can have a male thread on the outer periphery of the flange part 14c, the connecting part of the closed-type head 13 can have the male thread of the existing piping connecting part 13c of the conventional product, and the connecting parts on both ends of the head connecting pipe 15 can have female threads corresponding to the male threads of the water-discharging head 14 and the closed-type head 13, respectively. In this way, connecting parts that require processing can be made to be simple, and connecting parts that do not require processing can use existing connecting parts as they are.

[0036] [Operation when fire spreads] When a fire breaks out, in the initial stage, the closed-type head 13 and the open-type head 14 remain connected by the head connector 15 (as shown in Figures 1 and 2(a)), and the closed-type head 13 is first activated to spray water. The fire then cannot be contained or extinguished by the water spray from the closed-type head 13. If the fire subsequently spreads to the point where the ceiling T is burned down, the head connector 15 is heated and deformed by the hot air currents and flames, and the head connector 15 is no longer able to maintain its connection with the open-type head 14, causing it to fall from its installed position (at this point, the closed-type head 13 may fall first, or it may fall together with the closed-type head 13). This exposes the open-type head 14 (as shown in Figure 2(b)), and the open-type head 14 begins to spray water instead of the closed-type head 13.

[0037] [Variable water supply function] The pressurized water supply device 3 can be configured to supply fire extinguishing water to the secondary side piping 11 at a flow rate greater than when the closed head 13 of the connecting head 16 discharges water.

[0038] The pressurized water supply device 3 in FIG. 1 shows an example of a configuration in which the pressurized water supply device 3 has such a function of varying the amount of water supplied.

[0039] As shown in Figure 1, the pressurized water supply device 3 has a first pump 3A and a second pump 3B (driving sources such as motors are not shown for both) connected in parallel to the base end of the primary side piping section 5.

[0040] The first pump 3A has a pump capacity that can, by itself, deliver water at a flow rate required for the closed head 13 to discharge water at a predetermined flow rate, and the second pump 3B operates together with the first pump 3A and has a pump capacity that can deliver water at a flow rate required for the open head 14 to discharge water at a predetermined flow rate.

[0041] When the closed-type head 13 discharges water, only the first pump 3A operates to supply fire-extinguishing water to the closed-type head 13, and when the open-type head 14 discharges water, both the first pump 3A and the second pump 3B operate to supply fire-extinguishing water to the open-type head 14.

[0042] The pumps 3A and 3B can be controlled by a pump control panel 9. Specifically, for example, the pump control panel 9 outputs a pump start signal to the pressurized water supply device 3 when it receives a signal indicating a pressure drop in the piping from the pressure detection unit 8. First, when it receives a first pressure drop signal based on water being discharged from the closed-type head 13, it outputs a pump start signal to the first pump 3A to control the first pump 3A to operate alone, and then, when it receives a second pressure drop signal based on water being discharged from the open-type head 14, it outputs a pump start signal to the second pump 3B to control the second pump 3B to operate as well.

[0043] Here, the pressure detector 8 can be the same as that used to start the pressurized water supply device in conventional equipment. By doing so, even if a separate means for detecting a change in state when the open head 14 discharges water is not provided, the pressure detector 8, which is also provided in conventional equipment, can detect the change in state and switch the water supply rate of the pressurized water supply device 3.

[0044] The pump capacity of the second pump 3B may be such that it can alone supply water at a flow rate necessary for the open head 14 to discharge a predetermined flow rate of water. In this case, when the pump control panel 9 receives a second pressure drop signal based on the discharge of water from the open head 14, it may output a stop signal to the first pump 3A and a start signal to the second pump 3B, thereby controlling the second pump 3B to operate instead of the first pump 3A.

[0045] [Materials of other components] In order to ensure the water discharge function of the open head 14 when a fire spreads, not only the open head 14 but also the sprinkler piping 12 and fittings 17 can be made of highly fire-resistant materials.

[0046] [Configuration change example] An example of an embodiment of the sprinkler fire extinguishing system of the present invention has been described above with reference to the drawings, but the present invention is not limited to the above embodiment, and modifications to the configuration are possible within the scope of the gist of the invention.

[0047] For example, the head connecting part 15 may be made up of multiple parts. In this case, only the connecting part with the closed-type head 13 may be made of a material that deforms when heated above a predetermined temperature, and the deformation of this part may cause the entire head connecting part 15 to fall. [Explanation of symbols]

[0048] 1: Sprinkler fire extinguishing equipment 2: Water tank 3: Pressurized water supply device 3A: First pump 3B: Second pump 5: Primary piping section 8: Pressure detection unit 9: Pump control panel 10: Flow detection device 10a: Flow detection unit 11: Secondary piping unit 12: Sprinkler piping 13: Closed head 13a: Inlet 13b: Outlet 13c: Pipe connection 14: Open head 14a: Inlet 14b: Outlet 15: Head connecting portion 16: Connecting head T: Ceiling

Claims

1. A sprinkler fire extinguishing system comprising: a closed-type head; an open-type head that sprays water at a flow rate greater than that of the closed-type head; and a head connecting portion that connects the open-type head and the closed-type head while communicating the outlet of the open-type head with the inlet of the closed-type head.

2. 2. The sprinkler fire extinguishing system according to claim 1, wherein the head connecting portion falls from an installed position when heated to a predetermined temperature or higher.

3. 3. The sprinkler fire extinguishing system according to claim 2, wherein, when a fire breaks out, the closed-type head sprays water in the initial stage, while when the fire has spread to the point where the head connecting part falls, the open-type head sprays water.

4. The sprinkler fire extinguishing system further includes a pressurized water supply device for supplying fire extinguishing water to the closed head and the open head, 4. The sprinkler fire extinguishing system according to claim 3, wherein the pressurized water supply device supplies the fire extinguishing water to the open head at a flow rate greater than that when the closed head discharges water.

5. 5. The sprinkler fire extinguishing system according to claim 1, wherein the head connecting member is made of a material that deforms when heated to a predetermined temperature or higher.

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