Fire extinguishing system and method of manufacturing the same

Abstract

The present invention provides a fire extinguishing system capable of setting a necessary mode at a necessary site of a sprinkler system and a manufacturing method thereof. The fire extinguishing system is a fire extinguishing system provided in a first region and a second region different from the first region, and includes: a negative pressure sprinkler system (100b) provided in the first region; and a normal pressure or pressurized sprinkler system (200a) provided in the second region.

Description

[0001] This application is a divisional application of the patent application with application number 202180011145.X, application date January 12, 2021, and invention title “Fire extinguishing system and manufacturing method thereof”. TECHNICAL FIELD

[0002] The present invention relates to a fire extinguishing system and manufacturing method thereof. BACKGROUND

[0003] In the past, a wet sprinkler has been disclosed in Japanese Patent No. 3264939.

[0004] PRIOR ART DOCUMENTS

[0005] PATENT DOCUMENTS

[0006] Patent Document 1: Japanese Patent No. 3264939 SUMMARY

[0007] PROBLEMS TO BE SOLVED BY THE INVENTION

[0008] In the existing sprinkler system, in the case of failure of the sprinkler head, there is a problem of water discharge from the sprinkler head.

[0009] SOLUTION TO THE PROBLEM

[0010] The fire extinguishing system according to one aspect is a fire extinguishing system provided in a first area and a second area different from the first area, wherein the fire extinguishing system comprises: a negative pressure sprinkler system provided in the first area; and a normal pressure or pressurized sprinkler system provided in the second area, the fire extinguishing system further comprising: a water pump (2); a first primary pipe (4) connected to the water pump (2); a second primary pipe (101) branched from the first primary pipe (4); a first secondary pipe (202); a first valve (205) located at the boundary of the first primary pipe (4) and the first secondary pipe (202); a second valve (105) located at the boundary of the second primary pipe (101) and a second secondary pipe (102); a control device (3) controlling the output of the water pump (2), controlling the opening and closing of the first valve (205), and controlling the opening and closing of the second valve (105); a negative pressure pump (5) connected to the second secondary pipe (102); a plurality of first sprinkler heads (203) provided in the first secondary pipe (202); a plurality of second sprinkler heads (103) provided in the second secondary pipe (102); and a detector (104) detecting heat or smoke generated by fire, the detected information being sent from the detector (104) to the control device (3).

[0011] The fire extinguishing system according to one aspect is a fire extinguishing system provided in a first region and a second region different from the first region, wherein the fire extinguishing system is provided with: a negative pressure sprinkler system provided in the first region; and a normal pressure or pressurized sprinkler system provided in the second region.

[0012] In the fire extinguishing system thus configured, the sprinkler system of the necessary mode can be provided at the necessary site.

[0013] Preferably, the normal pressure or pressurized sprinkler system of the second region is provided with a sprinkler head in which a metal melts due to heat of fire, thereby discharging water from the sprinkler head without a signal from a detector.

[0014] In the fire extinguishing system thus configured, the normal pressure or pressurized sprinkler system of the second region is not linked to the detector, and thus water in the secondary pipe is discharged from the sprinkler head in the case where the metal of the sprinkler head melts due to heat of fire. In this system, coordinated control of the first region and the second region is not required, and thus the system can be implemented at low cost. The introduction cost is reduced.

[0015] The manufacturing method of the fire extinguishing system described above is as follows: a normal pressure or pressurized sprinkler system is provided in a first region, a water leakage site of a sprinkler pipe from the normal pressure or pressurized sprinkler system is determined, a patching material is adhered to the outside of the sprinkler pipe in a manner to block the water leakage site, and then a negative pressure pump is connected to the sprinkler pipe, thereby configuring a negative pressure sprinkler system.

[0016] In the manufacturing method of the fire extinguishing system thus configured, the negative pressure sprinkler system can be configured by patching the sprinkler system in the first region. As a result, the negative pressure sprinkler system can be manufactured at low cost. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a view for explaining a manufacturing method of a fire extinguishing system.

[0018] Figure 2 is a schematic view of the fire extinguishing system before patching.

[0019] Figure 3 is a schematic view of the fire extinguishing system after patching.

[0020] Figure 4 is a cross-sectional view of a water leakage site in Figure 3 and Figure 5 enlarged and shown.

[0021] Figure 5 is a schematic view of a fire extinguishing system according to another aspect.

[0022] BRIEF DESCRIPTION OF DRAWINGS:

[0023] 1...sprinkler system; 2...water pump; 3...control device; 4, 101, 201...primary pipe; 5...negative pressure pump; 100...first floor; 100a, 200a...pressurized sprinkler system; 100b...negative pressure sprinkler system; 102, 202...secondary pipe; 103, 203...sprinkler head; 104, 204...detector; 105, 205...valve; 109...negative pressure pipe; 110...leakage site; 111...repair material; 200...second floor; 1020...hole; S301, S302, S303...step. DETAILED DESCRIPTION

[0024] Hereinafter, an embodiment of the present application will be described with reference to the accompanying drawings.

[0025] (Method for manufacturing fire extinguishing system)

[0026] Figure 1 is a view for explaining a method for manufacturing a fire extinguishing system. As shown in Figure 1 , in the method for manufacturing a fire extinguishing system, a leakage of fluid from a secondary pipe of a sprinkler system is determined (step S301). The sprinkler system is a sprinkler system in which the secondary pipe is not negative pressure. The sprinkler system can also be a wet sprinkler system in which the secondary pipe is filled with liquid. The sprinkler system can also be a dry sprinkler system in which the secondary pipe is filled with gas.

[0027] Further, the sprinkler system is used for at least two areas of a first area and a second area. For example, the sprinkler system is used for a building of two or more floors. The sprinkler system is provided in a first floor and a second floor which is higher or lower than the first floor of the building. Note that the two areas do not necessarily have to be located vertically. The two areas can also be provided on the same floor or on the same ground.

[0028] The secondary pipe of the sprinkler system refers to a pipe connected to a sprinkler head. In contrast, a pipe from a water pump to a valve is referred to as a primary pipe of the sprinkler system.

[0029] As a method for determining a leakage from the secondary pipe, for example, in a case where the secondary pipe is filled with water, the water leaks and a spot can be formed in the building, so if the secondary pipe in the vicinity of the spot is investigated, the site of the leakage can be determined. In a case where the secondary pipe is filled with gas, a pressure sensor is provided in the secondary pipe, in a case where a decrease in pressure per unit time is large, it is considered that there is a leakage, and by investigating the secondary pipe, the site of the leakage can be determined.

[0030] Generally, a leak is likely to occur from a portion of the secondary pipe where the wall thickness is thin. For example, the end portion of the secondary pipe is mostly twisted off to be connected to a joint. The twisted-off portion is likely to be thin-walled, and thus a leak is sometimes likely to occur from this portion.

[0031] After the leak is determined, the liquid in the secondary pipe is removed. In the case where the secondary pipe is filled with gas, the gas can also be left without being removed.

[0032] A leak occurs in a pipe of a generally pressurized or non-pressurized sprinkler system due to the following mechanism. When a long time elapses after the sprinkler system is installed, corrosion occurs from the inside of the pipe toward the outside of the pipe due to moisture in the pipe, and eventually a hole is formed that penetrates from the inside of the pipe to the outside.

[0033] The leak is repaired from the outside of the secondary pipe (step S302). As a method of repairing the leak, there are methods such as the following: a tape made of an organic or inorganic material is attached from the outside of the secondary pipe; the leaking portion is welded from the outside of the secondary pipe; a gel or sol-like substance is injected into the leaking portion from the outside of the secondary pipe; and a fluid having a high viscosity is injected into the leaking portion from the outside of the secondary pipe and is solidified. The leaking portion is repaired from the outside of the secondary pipe because, in the subsequent process, the inside of the secondary pipe is made to be under a negative pressure, and thus if the leaking portion is repaired from the outside of the secondary pipe, the repair material is attracted toward the inside by a force, and the repair material is not likely to peel off. Thus, it is virtually impossible to repair from the inside of the secondary pipe, and thus it is low cost to repair the secondary pipe from the outside as compared with replacing the secondary pipe.

[0034] The leak is repaired in one of the first region and the second region in which the leak has occurred, and the secondary pipe is not repaired in the other region.

[0035] When the repair is performed, it is preferable to perform the repair after the outside of the secondary pipe is cleaned in order to easily attach the repair material to the outside of the secondary pipe. As a cleaning method, there are a cleaning using a surfactant, a cleaning using an acid or a base, a cleaning using surface grinding with a grinding wheel, and the like.

[0036] The leaking portion is determined, and the hole is repaired from the outside of the secondary pipe. It is also considered to remove the pipe including the leaking portion, but if the pipe is removed, it is a large-scale modification, and it increases the trouble of maintenance in a protected area. Furthermore, the construction cost is also high. Thus, the leak is stopped by repairing the hole from the outside with a repair material. Since a negative pressure sprinkler system is constructed later, even if the repair material is attracted toward the hole due to the negative pressure, the repair material is not pressurized from the hole toward the outside. Thus, the repair material does not peel off.

[0037] The negative pressure pump is connected to the repaired secondary pipe (step S303). By connecting the negative pressure pump to the secondary pipe, the inside of the secondary pipe becomes negative pressure. If the secondary pipe is made negative pressure, the repair material provided outside the secondary pipe is attracted to the inside of the secondary pipe, and thus the repair material is fixed to the site of the leak.

[0038] In the region where the negative pressure pump is connected to the secondary pipe, the control system is changed so that the secondary pipe functions as a negative pressure sprayer. The inside of the secondary pipe is negative pressure, and can be filled with liquid or not. In the case where the inside of the secondary pipe is negative pressure and the secondary pipe is filled with liquid, the region functions as a wet-type negative pressure sprayer. The other regions function as sprayers that are not negative pressure. In the case where the inside of the secondary pipe is negative pressure and the secondary pipe is not filled with liquid, the region functions as a dry-type negative pressure sprayer. The other regions function as sprayers that are not negative pressure.

[0039] In the case of a wet-type negative pressure sprayer, the inside of the secondary pipe is filled with liquid, and the inside of the secondary pipe becomes negative pressure, so the liquid evaporates from the inside of the secondary pipe. In order to make up for the evaporated liquid, a valve provided at the boundary between the secondary pipe and the primary pipe is opened, and liquid flows from the primary pipe to the secondary pipe. In order to be able to perform such control, a sensor that detects the amount of liquid in the secondary pipe, and a control device that opens the valve based on the sensor in order to supply liquid from the primary pipe to the secondary pipe as needed, need to be newly provided. Also, it is possible to stop or weaken the suction based on the negative pressure pump at the time of a fire so that the liquid in the secondary pipe does not flow to the negative pressure pump side and the water in the secondary pipe is discharged only from the sprayers.

[0040] In the case of a dry-type negative pressure sprayer, there is no need to consider the reduction of the liquid in the secondary pipe as described above, so there is no need for control of the valve for preventing the reduction of the liquid in the secondary pipe. However, it is possible to stop or weaken the suction based on the negative pressure pump at the time of a fire so that the liquid in the secondary pipe does not flow to the negative pressure pump side and the water in the secondary pipe is discharged only from the sprayers.

[0041] The advantage of the sprayer system in which negative pressure is formed only in a specific region is that, first, the retrofit cost is reduced compared to the case where all regions are made negative pressure.

[0042] Next, with the sprayer system in which negative pressure is formed, it is possible to perform repair work from the outside of the secondary pipe, and the construction cost is reduced.

[0043] The repaired pipe is left, and the members used only in the pressurized or non-pressurized sprayer system are removed. In the pressurized or non-pressurized sprayer system and the negative pressure sprayer system, a plurality of constituent parts are different. Therefore, the equipment used only in the pressurized or non-pressurized sprayer system is removed.

[0044] (Description of negative pressure sprinkler system)

[0045] A negative pressure sprinkler system is used in a water-avoiding environment such as a medical facility, a nuclear power plant, a lithium battery factory, and the like. The negative pressure sprinkler system is installed in a building. The building has a first section as a lower floor and a second section as an upper floor. Note that the negative pressure sprinkler system does not necessarily need to be used in a water-avoiding environment, and can be used in an environment in which a pressurized or non-pressurized sprinkler system is used.

[0046] The negative pressure sprinkler system has a primary pipe, a secondary pipe connected to the primary pipe, a sprinkler head provided to the secondary pipe, a valve provided to a boundary of the primary pipe and the secondary pipe, and a water pump for delivering water to the primary pipe.

[0047] The primary pipe is filled with water. The water is pressurized by the water pump. The water is supplied to the water pump from a fire-fighting water tank. The water can also be supplied to the water pump from an overhead water tank of the uppermost floor of the building. The primary pipe vertically rises from the water pump to the uppermost portion of the building, branching at each floor. The number of floors of the building is not limited to two. The water of the primary pipe is cut off by the valve, and the water of the primary pipe is delivered to the secondary pipe by opening the valve. The opening and closing of the valve is controlled by a computer.

[0048] The secondary pipe is connected to the valve. The secondary pipe is arranged in a section for fire fighting. The secondary pipe is arranged at the top of the section. A plurality of sprinkler heads are provided to the secondary pipe. The number of sprinkler heads is determined by the size of the section.

[0049] The sprinkler head is a closed type sprinkler head, and is provided with a plurality of water discharge holes. The sprinkler head has a heat-sensitive mechanism (fusible metal plate). In a normal state, the water discharge holes are shut off from the secondary pipe inside the sprinkler head. When the heat-sensitive mechanism melts due to a flame at the time of a fire, the shut-off is opened, and water is discharged from the holes of the sprinkler head via the primary pipe.

[0050] The negative pressure system has a negative pressure pipe connected to the secondary pipe, and a negative pressure pump that makes the inside of the negative pressure pipe negative. By connecting the negative pressure pipe to the secondary pipe, a sprinkler system that is negative pressure can be realized.

[0051] The negative pressure pump generates negative pressure. The negative pressure pump can also be constituted by a main machine and a backup machine. In this case, the amount of use of the entire facility can be provided at the time of a failure, at the time of maintenance, and the like. In the case of use in a medical facility, in order to prevent air containing attracted bacteria and germs from polluting the atmosphere, they are collected by an attraction filter.

[0052] The negative pressure pipe connected to the negative pressure pump is vertically erected from the negative pressure pump to the uppermost floor of the building, and is branched at each floor. In each floor, the negative pressure pipe is branched and is spread in each room. The negative pressure pump is connected to the negative pressure pipe.

[0053] The negative pressure pipe is connected to the secondary pipe at the connection point. Thereby, in the normal state, the secondary pipe is under negative pressure.

[0054] In the case where the negative pressure sprinkler system is a wet type negative pressure sprinkler system, in the normal state, the secondary pipe is under negative pressure, and water is present in the secondary pipe. By being under negative pressure, even if the sprinkler head is broken, water can be prevented from being discharged from the sprinkler head. In order to prevent water from moving from the secondary pipe to the negative pressure pipe, a film or a gas-liquid separation device which allows water vapor to pass but does not allow water to pass, or the like, can be provided in the vicinity of the connection point. Since the secondary pipe is under negative pressure, water evaporates. In order to replenish water, if water decreases, a valve can be opened to replenish water to the secondary pipe.

[0055] In the case where the negative pressure sprinkler system is a dry type negative pressure sprinkler system, in the normal state, the secondary pipe is under negative pressure, and water is not present in the secondary pipe.

[0056] The detection system has a fire detector and a computer. When a fire occurs in the protected zone, the fire detector detects the heat or the smoke. The computer is connected to the valve through a signal line. The computer is connected to the water pump through a signal line.

[0057] The fire extinguishing system has: a negative pressure sprinkler system having a sprinkler head and a secondary pipe which is a sprinkler pipe for supplying water to the sprinkler head, and the secondary pipe is maintained under a negative pressure state in the normal state; a negative pressure pipe; and a negative pressure pump which is a negative pressure device for supplying negative pressure to the secondary pipe and the negative pressure pipe.

[0058] Figure 2 is a schematic view of the fire extinguishing system before the repair. As shown in Figure 2 A pressurized sprinkler system 100a is provided in the first floor 100 which is a first area (first protected zone). A pressurized sprinkler system 200a is provided in the second floor 200 which is a second area (second protected zone). The pressurized sprinkler systems 100a, 200a can be replaced with other sprinkler systems which are not negative pressure type.

[0059] The water pump 2 is connected to a primary pipe 4. The output of the water pump 2 is controlled by a control device 3. The output of the water pump 2 can be continuously varied. Water is supplied to the water pump 2 from a water tank which is not shown. Impurities can not be added to the water, or a rust preventive or the like can be added.

[0060] A primary pipe 101 for one story 100 is branched from the primary pipe 4. The primary pipe 101 is connected to a valve 105 located at the boundary of the primary pipe 101 and a secondary pipe 102. The opening and closing of the valve 105 is controlled by the control device 3.

[0061] A plurality of sprinkler heads 103 are provided in the secondary pipe 102. The sprinkler heads 103 are provided in the one story 100. The sprinkler heads 103 have a portion that melts due to heat at the time of a fire. At the time of a fire, the portion melts, and water, which is a fire extinguishing agent, is supplied from the secondary pipe 102 to the one story 100 via the sprinkler heads 103.

[0062] The secondary pipe 102 can be filled with water or can not be filled with water.

[0063] A detector 104 for detecting heat is provided in the one story 100. If the detector 104 detects heat, the signal is sent to the control device 3. The control device 3 issues an instruction to the water pump 2 to increase the output of the water pump 2. The control device 3 opens the valve 105. Even in the case where the secondary pipe 102 is not filled with water, water is filled in the secondary pipe 102 by opening the valve 105. However, air in the secondary pipe 102 is compressed and accumulated in the secondary pipe 102. In the case where the secondary pipe 102 is filled with water in advance, the water pressure in the secondary pipe 102 is increased by opening the valve 105.

[0064] When the meltable portion of the sprinkler head 103 melts due to heat, water of the secondary pipe 102 is discharged to the one story 100 via the sprinkler head 103.

[0065] The primary pipe 4 is connected to a valve 205 located at the boundary of the primary pipe 4 and a secondary pipe 202. The opening and closing of the valve 205 is controlled by the control device 3. The primary pipe 4 is connected to the other primary pipes 101, 201.

[0066] A plurality of sprinkler heads 203 are provided in the secondary pipe 202. The sprinkler heads 203 are provided in the two story 200. The sprinkler heads 203 have a portion that melts due to heat at the time of a fire. At the time of a fire, the portion melts, and water, which is a fire extinguishing agent, is supplied from the secondary pipe 202 to the two story 200 via the sprinkler heads 203. The secondary pipe 202 can be filled with water or can not be filled with water.

[0067] A detector 204 for detecting heat is provided in the second floor 200. If the detector 204 detects heat, the signal is sent to the control device 3. The control device 3 issues an instruction to the water pump 2 to increase the output of the water pump 2. The control device 3 opens the valve 205. Even if the secondary pipe 202 is not filled with water, the secondary pipe 202 is filled with water by opening the valve 205. However, air in the secondary pipe 202 is compressed and accumulated in the secondary pipe 202. In the case where the secondary pipe 202 is previously filled with water, the water pressure in the secondary pipe 202 is increased by opening the valve 205.

[0068] In the case where the detector 104 can be reused in the non-negative pressure sprinkler system and the negative pressure sprinkler system 100b, the detector 104 is reused.

[0069] When the meltable portion of the sprinkler head 203 melts due to heat, the water in the secondary pipe 202 is discharged to the second floor 200 via the sprinkler head 203.

[0070] Figure 3 is a schematic view of a repaired fire extinguishing system. As shown in Figure 3 a leak site 110 is generated in the secondary pipe 102. In this case, the leak site 110 is repaired from the outside. Further, the secondary pipe 102 is connected to the negative pressure pump 5. The negative pressure pipe 109 is interposed between the secondary pipe 102 and the negative pressure pump 5. Thereby, the secondary pipe 102 can be made into negative pressure.

[0071] Figure 4 is a cross-sectional view of a leak site. As shown in Figure 4 a hole 1020 is formed in the secondary pipe 102 at the leak site 110. The hole 1020 is plugged from the outside of the secondary pipe 102 with a repair material 111.

[0072] In this example, an example in which a leak site 110 is generated in the first floor 100 is shown, but sometimes a leak site is generated in the secondary pipe 202 of the second floor 200. In this case, the secondary pipe 202 is repaired from the outside, and the secondary pipe 202 is connected to the negative pressure pump 5.

[0073] While the secondary pipe 102 of the first floor 100 is made into negative pressure, water can be filled in the secondary pipe 102 or not. In the case where water is filled, since the secondary pipe 102 is made into negative pressure, the water is easily evaporated. When the water in the secondary pipe 102 is evaporated and the water level is decreased, the water is replenished in the secondary pipe 102 by opening the valve 105.

[0074] In the case where water is not filled in the secondary pipe 102, the negative pressure sprinkler operates as a dry type.

[0075] In the sprinkler system 1, the sprinkler system of the negative pressure is provided in the first floor 100, and the sprinkler system of the non-negative pressure is provided in the second floor 200. Note that, the first floor 100 can be the sprinkler system of the non-negative pressure, and the second floor 200 can be the sprinkler system of the negative pressure.

[0076] Further, in a case where the water leakage site is generated not only in the secondary pipe 102 of the first floor 100 but also in the secondary pipe 202 of the second floor 200, the water leakage site is repaired from the outside of the secondary pipe 202, and the secondary pipe 202 is connected to the negative pressure pump 5, whereby the second floor 200 can also be configured as the sprinkler system of the negative pressure.

[0077] The hole 1020 as a pinhole is formed due to oxygen or the like contained in the water in the pipe. Due to the presence of the hole 1020, water flows out from the hole 1020. After the position of the hole 1020 is determined, the hole 1020 can be plugged from the outside with the repair material 111.

[0078] As the repair material 111, there are an aluminum tape, a tape in which a resin is contained in a glass fiber cloth, and a tape of an adhesive. Further, a metal plate can be welded to the secondary pipe 102 to configure the repair material 111.

[0079] The negative pressure sprinkler system 100b is originally a sprinkler system of the pressurized type or the non-pressurized type, is plugged by forming the hole 1020, and is retrofitted to the negative pressure type.

[0080] The sprinkler system 1 includes the negative pressure sprinkler system 100b having the sprinkler head 103 and the secondary pipe 102 of the negative pressure inside which supplies water to the sprinkler head 103, and the negative pressure pump 5 which maintains the negative pressure state of the negative pressure sprinkler system 100b in the normal state. The hole 1020 which penetrates the secondary pipe 102 in the thickness direction is formed in the secondary pipe 102, and the sprinkler system 1 further includes the repair material 111 which seals the opening of the hole 1020 from the outside of the secondary pipe.

[0081] The operation of the negative pressure sprinkler system 100b will be described. When a fire occurs in the first floor 100 which is a part of the protected zone, the detector 104 detects heat or smoke generated by the fire. The detected information is transmitted from the detector 104 to the control device 3 which is a computer. The control device 3 sends a signal to the valve 105 to open the valve 105. The control device 3 drives the water pump 2 or increases the driving force of the water pump 2. Thus, in the dry type negative pressure sprinkler system 100b, water is filled in the secondary pipe 102 which is in the negative pressure state in which water is not present in the normal state. In the wet type negative pressure sprinkler system 100b, water is filled in the secondary pipe 102 in the negative pressure state in the normal state. At this time, the driving force of the negative pressure pump 5 can be weaker than that in the stable state.

[0082] The heat generated by the fire melts the heat-sensitive mechanism of the sprinkler head 103. By this, the hole for water discharge of the sprinkler head 103 is connected to the secondary pipe 102. By opening the valve 105, water can be discharged from the hole for water discharge of the sprinkler head 103 to extinguish the fire.

[0083] The negative pressure sprinkler system 100b according to the embodiment has the following effects compared to a dry sprinkler system (pre-operated sprinkler system) in which the secondary pipe is normally under atmospheric pressure. In the dry sprinkler system, the pump 1 fills the secondary pipe with water at the time of fire, but at this time, the air in the secondary pipe is compressed by the water, so the secondary pipe cannot be filled with water smoothly (in a short time). In contrast, in the wet negative pressure sprinkler system 100b, the secondary pipe 102 is filled with water at a negative pressure, so water can be sprayed from the sprinkler head 103 as soon as possible. Thus, the problem of the dry sprinkler (pre-operated sprinkler) that the water from the sprinkler head is delayed can be solved. Even in the case of the dry negative pressure sprinkler system 100b, since the secondary pipe 102 is under a negative pressure, water can be filled into the secondary pipe 102 quickly, so water can be sprayed from the sprinkler head 103 as soon as possible.

[0084] The secondary pipe 102 is a member used in a pressurized or non-pressurized sprinkler system, so the manufacturing cost can be reduced compared to a reinstallation. In addition, the secondary pipe 102 is pasted with the repair material 111 on the outside, but the secondary pipe 102 is under a negative pressure in the normal state, so water does not leak again from the hole 1020.

[0085] The sprinkler system 1 as a fire extinguishing system is a fire extinguishing system provided in a first floor 100 as a first area and a second floor 200 as a second area different from the first area, and has a negative pressure sprinkler system 100b provided in the first floor 100 and a normal pressure or pressurized sprinkler system 200a provided in the second floor 200. It can also be that the first floor 100 is the second area and the second floor 200 is the first area.

[0086] In the fire extinguishing system thus configured, the necessary sprinkler system can be provided at the necessary site. Note that, as a manufacturing method, a method of repairing the hole 1020 with the repair material 111 is shown, but the hole 1020 can not necessarily be provided. In the case where the hole 1020 is not provided, the repair material 111 is also not provided.

[0087] Figure 5 is a schematic view of a fire extinguishing system according to another aspect. As Figure 5 shown, in the fire extinguishing system 1 according to another aspect, a detector is not provided in the second floor 200, unlike Figure 3 and Figure 4The fire extinguishing system 1 shown differs. The normal pressure or pressurized sprinkler system 200a of the second floor 200 is provided with a sprinkler head 203, and the metal inside the sprinkler head 203 melts due to the heat of a fire, thereby discharging water from the sprinkler head 203 without a signal from the detector. That is, the sprinkler head 203 is not connected to the control device 3. Note that, in this embodiment, it is also possible to provide a hole 1020 of the secondary pipe 102 and to manufacture by patching it with a patching material 111. Alternatively, it is also possible not to provide the hole 1020 of the secondary pipe 102. In the case where the hole 1020 is not provided, the patching material 111 is also not provided. Figure 3 and Figure 4 In the same manner as in the embodiment of the first floor 100, the second floor 200 is the first region, and the first floor 100 is the second region. Further, it is also possible to manufacture by a method of providing the hole 1020 of the secondary pipe 102 and patching it with the patching material 111. Alternatively, it is also possible not to provide the hole 1020 of the secondary pipe 102. In the case where the hole 1020 is not provided, the patching material 111 is also not provided.

[0088] In the case where the sprinkler head 203 discharges water without a signal from the detector and the control device 3, the main reason for determining the discharge condition of water from the sprinkler head 203 of the second floor 200 is only the melting temperature of the metal inside the sprinkler head 203, and the control of the discharge condition becomes simple. Therefore, it is possible to introduce the sprinkler system 1 at low cost.

[0089] The fire extinguishing system according to one aspect is a fire extinguishing system provided in at least either of a first region and a second region different from the first region, the fire extinguishing system including: a negative pressure sprinkler system having a sprinkler head and a secondary pipe that supplies water to the sprinkler head and is negative pressure inside; and a negative pressure pump that maintains the negative pressure sprinkler system in a negative pressure state in a normal state, a hole that penetrates the secondary pipe in a thickness direction is formed in the secondary pipe, and the fire extinguishing system further includes a patching material that seals an opening of the hole from an outside of the secondary pipe.

[0090] In the fire extinguishing system thus configured, since the patching material that seals the opening of the hole from the outside of the secondary pipe is provided, even in the case where the secondary pipe is negative pressure inside, external gas is not introduced from the hole.

[0091] The manufacturing method of the fire extinguishing system according to one aspect includes the steps of: providing a sprinkler system having a sprinkler pipe that stores water in a normal state in a first floor and a second floor that is higher or lower than the first floor of a building, determining a water leakage site of the sprinkler pipe from either of the first floor and the second floor, adhering a patching material to the outside of the sprinkler pipe in a manner of plugging the water leakage site, and connecting a negative pressure pump to the sprinkler pipe, thereby configuring a negative pressure sprinkler system.

[0092] In the manufacturing method of the fire extinguishing system thus configured, the negative pressure sprinkler system can be configured by repairing the sprinkler system that stores water in a normal state. As a result, the negative pressure sprinkler system can be manufactured at low cost.

[0093] The manufacturing method of the fire extinguishing system according to another aspect includes the steps of: providing a sprinkler system having a sprinkler pipe that does not store water in a normal state in a first floor and a second floor that is higher or lower than the first floor of a building, determining a position of a leak of the sprinkler pipe from either of the first floor and the second floor, adhering a repair material to the outside of the sprinkler pipe in a manner to block the position of the leak, and connecting a negative pressure pump to the sprinkler pipe, thereby configuring a negative pressure sprinkler system.

[0094] In the manufacturing method of the fire extinguishing system thus configured, the negative pressure sprinkler system can be configured by repairing the sprinkler system that does not store water in a normal state. As a result, the negative pressure sprinkler system can be manufactured at low cost.

[0095] The supplementary note 1 is a fire extinguishing system provided in at least either of a first region and a second region different from the first region, the fire extinguishing system including: a negative pressure sprinkler system having a sprinkler head and a secondary pipe that is negative pressure inside and supplies water to the sprinkler head; and a negative pressure pump that maintains the negative pressure sprinkler system in a negative pressure state in a normal state, a hole that penetrates the secondary pipe in a thickness direction is formed in the secondary pipe, and the fire extinguishing system further includes a repair material that seals an opening of the hole from the outside of the secondary pipe.

[0096] The supplementary note 2 is a manufacturing method of a fire extinguishing system in which a sprinkler system having a sprinkler pipe that stores water in a normal state is provided in a first region and a second region different from the first region, a position of a water leak of the sprinkler pipe from either of the first region and the second region is determined, a repair material is adhered to the outside of the sprinkler pipe in a manner to block the position of the water leak, and a negative pressure pump is connected to the sprinkler pipe, thereby configuring a negative pressure sprinkler system.

[0097] The supplementary note 3 is a manufacturing method of a fire extinguishing system in which a sprinkler system having a sprinkler pipe that does not store water in a normal state is provided in a first region and a second region different from the first region, a position of a leak of the sprinkler pipe from either of the first region and the second region is determined, a repair material is adhered to the outside of the sprinkler pipe in a manner to block the position of the leak, and a negative pressure pump is connected to the sprinkler pipe, thereby configuring a negative pressure sprinkler system.

[0098] It is to be understood that the embodiments disclosed herein are illustrative rather than limiting. The scope of the application is not to be determined from the embodiments shown, but rather from the claims as set forth below, and any equivalents thereof.

Claims

1. A fire extinguishing system provided in a first area and a second area different from the first area, wherein the fire extinguishing system is provided with a negative pressure sprayer system provided in the first area; and a normal pressure or pressurized sprayer system provided in the second area, the fire extinguishing system is further provided with a water pump (2); a first primary pipe (4) connected to the water pump (2); a second primary pipe (101) branched from the first primary pipe (4); a first secondary pipe (202); a first valve (205) located at a boundary of the first primary pipe (4) and the first secondary pipe (202); a second valve (105) located at a boundary of the second primary pipe (101) and a second secondary pipe (102); a control device (3) that controls output of the water pump (2), opening and closing of the first valve (205), and opening and closing of the second valve (105); a negative pressure pump (5) connected to the second secondary pipe (102); a plurality of first sprayer heads (203) provided in the first secondary pipe (202); a plurality of second sprayer heads (103) provided in the second secondary pipe (102); and a detector (104) that detects heat or smoke generated by a fire, detected information is transmitted from the detector (104) to the control device (3), the negative pressure sprayer system is configured by connecting the negative pressure pump and a sprayer-use pipe of the normal pressure or pressurized sprayer system.

2. The fire extinguishing system according to claim 1, wherein the normal pressure or pressurized sprayer system of the second area is provided with a sprayer head in which a metal melts due to heat of a fire, thereby discharging water from the sprayer head without a signal from the detector.

3. A manufacturing method of a fire extinguishing system, which is a method of manufacturing the fire extinguishing system according to claim 1 or 2, wherein the normal pressure or pressurized sprayer system is provided in the first area, a water leakage site of the sprayer-use pipe from the normal pressure or pressurized sprayer system is determined, a patching material is adhered to the outside of the sprayer-use pipe in a manner of plugging the water leakage site, and then a negative pressure pump is connected to the sprayer-use pipe, thereby configuring the negative pressure sprayer system.

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