TWI814395B - fire extinguishing system - Google Patents

Abstract

A fire extinguishing system is provided, which is a sprinkler system that can be installed in the required places and in the required manner. The fire extinguishing system is a fire extinguishing system set up in the first area and a second area different from the first area. It includes: a negative pressure sprinkler system (100b) set up in the first area; and in the second area Set up normal pressure or pressurized sprinkler system (200a).

Description

fire extinguishing system

The present invention relates to a fire extinguishing system and a manufacturing method thereof.

In the past, a wet sprinkler system was disclosed in Japanese Patent No. 3264939. [Prior patent documents] [Patent Document]

[Patent Document 1] Japanese Patent No. 3264939

[Problem to be solved by the invention]

In the past sprinkler system, water was discharged from the sprinkler head when the sprinkler head failed. [Means to solve the problem]

A fire extinguishing system according to one form is a fire extinguishing system set up in a first area and a second area different from the first area, and includes: a negative pressure sprinkler system set up in the first area; and Normal pressure or pressurized sprinkler system installed in the area.

In the fire extinguishing system constructed in this way, a sprinkler system of the required form can be installed where needed.

The normal pressure or pressurized sprinkler system in the second area has a sprinkler head, and because the metal in the sprinkler head melts due to the heat of the fire, it is better to discharge water from the sprinkler head when there is no signal from the sensor.

In a fire extinguishing system constructed in this way, because the normal pressure or pressurized sprinkler system in the second area is not connected to the sensor, when the metal in the sprinkler head melts due to the heat of the fire, the sprinkler system The water head discharges the water in the secondary pipe. In this system, since coordinated control of the first and second areas is not required, it can be implemented at low cost. Import costs become cheaper.

The manufacturing method of the above-mentioned fire extinguishing system is to install a normal pressure or pressurized sprinkler system in the first area; specify the leakage point of the sprinkler pipe from the normal pressure or pressurized sprinkler system, and plug the leakage point. After the repair material is attached to the outside of the sprinkler piping, a negative pressure pump is connected to the sprinkler piping to form a negative pressure sprinkler system.

In the manufacturing method of the fire extinguishing system constructed in this way, a negative pressure sprinkler system can be formed by repairing the sprinkler system in the first area. As a result, a negative pressure sprinkler system can be manufactured at low cost.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. (Method of manufacturing fire extinguishing system)

Figure 1 is a diagram illustrating a method of manufacturing a fire extinguishing system. As shown in FIG. 1 , in the manufacturing method of the fire extinguishing system, leakage of fluid from the secondary piping of the sprinkler system is specified (step S301 ). The sprinkler system is a sprinkler system where the secondary piping will not become a negative pressure. The sprinkler system can also be a wet sprinkler system in which the secondary piping is filled with liquid. The sprinkler system can also be a dry sprinkler system with secondary pipes filled with gas.

Furthermore, the sprinkler system is used in at least two areas: the first area and the second area. For example, sprinkler systems are used in buildings with more than 2 floors. Install a sprinkler system on the first floor of the building and on the second floor above or below the first floor. In addition, the two regional systems are not necessarily located above and below. The two areas can also be set up on the same floor or the same ground.

The secondary piping of the sprinkler system refers to the piping connected to the sprinkler head. In contrast, the piping from the water pump to the valve is called the primary piping of the sprinkler system.

As a method of identifying leakage from secondary piping, for example, when the secondary piping is filled with water, the leakage of water causes stains in the building. Therefore, by investigating the secondary piping near the stain, the leakage point can be identified. When the secondary piping is filled with gas, a pressure sensor is installed in the secondary piping. If the decrease in pressure per unit time is large, it is regarded as a leak. By investigating the secondary piping, the leak can be identified. at.

Generally, leakage is likely to occur from the thin portion of the secondary piping. For example, the ends of secondary piping are often threaded and connected to joints. The thickness of the threaded portion tends to become thinner, so leakage may occur from this portion.

After the leak can be identified, the liquid in the secondary piping is removed. If the secondary piping is filled with gas, the gas does not need to be removed.

Water leakage from the pipes of a general pressurized or non-pressurized sprinkler system is based on the following structure. After a long period of time has passed since the sprinkler system was installed, corrosion due to moisture in the pipes progresses from the inside of the pipes to the outside of the pipes, eventually forming a hole penetrating from the inside of the pipes to the outside.

The leakage is repaired from the outside of the secondary piping (step S302). Methods for repairing leaks include pasting a tape made of organic or inorganic material from the outside of the secondary piping, welding the leakage point from the outside of the secondary piping, injecting gel into the leakage point from the outside of the secondary piping, or A sol-like substance, a highly viscous fluid injected from outside the secondary piping to the leakage point, and the fluid hardened, etc. This is because the leakage is repaired from the outside of the secondary piping for the following reasons. When the leakage is repaired from the outside of the secondary piping in a later step due to the negative pressure in the secondary piping, the repair material is pulled inward. The repair material is difficult to detach due to the force of intrusion; repairing the secondary piping from the inside is virtually impossible; repairing the secondary piping from the outside is less expensive than replacing the secondary piping, etc.

The area to be repaired for leakage shall be one of the first area and the second area where the leak occurred, and the secondary piping in other areas will not be repaired.

When repairing, it is best to clean the outside of the secondary piping so that the repair material can easily adhere to the outside of the secondary piping. As cleaning methods, there are cleaning using surfactants, cleaning by acid or alkali, cleaning by surface grinding with a grinding wheel, etc.

After identifying the leakage point, repair the hole from the outside of the secondary piping. It is also considered to remove the piping containing the leakage, but the removal of the piping will increase the manpower and time for maintenance in the protective zone during large-scale modifications. Furthermore, construction costs also become more expensive. Therefore, the hole is repaired from the outside with repair material to stop the leakage. Because the negative pressure sprinkler system is built behind the hole, even if the repair material is sucked into the hole due to negative pressure, the repair material will not be pressurized outward from the hole. Therefore, the repair material will not peel off.

Connect the negative pressure pump to the repaired secondary pipe (step S303). By connecting a negative pressure pump to the secondary piping, negative pressure can be achieved in the secondary piping. When the inside of the secondary piping becomes a negative pressure, the repair material provided on the outside of the secondary piping is pulled into the inside of the secondary piping, so that the repair material is fixed at the leakage point.

In the area where the negative pressure pump is connected to the secondary piping, the control system is changed to a sprinkler in which the secondary piping acts as negative pressure. The secondary piping is under negative pressure and may not be filled with liquid or may be filled with liquid. When there is negative pressure in the secondary piping and the secondary piping is filled with liquid, this area functions as a wet negative pressure sprinkler. Other areas function as sprinklers that are not negative pressure. When there is negative pressure in the secondary piping and the secondary piping is not filled with liquid, this area functions as a dry negative pressure sprinkler. Other areas function as sprinklers that are not negative pressure.

In the case of a wet negative pressure sprinkler, the secondary piping is filled with liquid and the pressure inside the secondary piping becomes negative, so the liquid evaporates from the secondary piping. In order to replenish the evaporated liquid, a valve provided at the boundary between the secondary piping and the primary piping is opened to allow the liquid to flow from the primary piping to the secondary piping. In order to realize this kind of control, new devices are required: a sensor that detects the amount of liquid in the secondary piping; and a control device that supplies liquid from the primary piping to the secondary piping based on the sensor. And open the valve. It is also possible to make it so that in the event of a fire, by stopping the suction from the negative pressure pump or weakening the suction force, the liquid in the secondary piping will not flow to the negative pressure pump side and will only be discharged from the sprinkler into the secondary piping. water.

In the case of a dry negative pressure sprinkler, there is no need to consider the decrease in the liquid in the secondary piping as described above, so the control of the valve to prevent the decrease in the liquid in the secondary piping is not required. However, in the event of a fire, by stopping the suction by the negative pressure pump or weakening the suction force, the liquid in the secondary piping will not flow to the negative pressure pump side and only the secondary piping will be discharged from the sprinkler. water inside.

The advantage of using this method to create a negative pressure sprinkler system in only a specific area is that, first of all, compared with the case of creating a negative pressure sprinkler system in all areas, the modification cost becomes cheaper.

Secondly, by creating a negative pressure sprinkler system, the repair work can be done from the outside of the secondary piping, and the construction cost is reduced.

Leave the piping that has been repaired and remove components that are only used in pressurized or non-pressurized sprinkler systems. There are many differences between pressurized or non-pressurized sprinkler systems and negative pressure sprinkler systems. Therefore, exclude machines used only in pressurized or non-pressurized sprinkler systems. (Description of negative pressure sprinkler system)

Negative pressure sprinkler systems are used in environments that do not like moisture, such as medical facilities, nuclear power plants, lithium battery factories, etc. Negative pressure sprinkler systems are installed in buildings. The building has a first partition on the lower floor and a second partition on the upper floor. In addition, negative pressure sprinkler systems are not necessarily used in environments that do not like moisture. They can also be used in environments that use pressurized or non-pressurized sprinkler systems.

The negative pressure sprinkler system has: a primary piping; a secondary piping connected to the primary piping; a sprinkler head set on the secondary piping; and a water pump used to supply water to a valve set at the boundary between the primary piping and the secondary piping. and primary piped water supply.

Fill the primary piping system with water. This water system is pressurized by a water pump. For the water pump, water is supplied from the fire extinguishing tank. Water can also be supplied to the pump from an elevated tank on the uppermost floor of the building. The primary piping system runs vertically from the water pump to the uppermost part of the building and is branched on each floor. The number of floors in a building is not limited to 2 floors. The water system in the primary pipeline is stopped by the valve, and when the valve is opened, the water in the primary pipeline is supplied to the secondary pipeline. The opening and closing of the valve is controlled by the computer.

The secondary piping system is connected to the valve. The secondary piping system is arranged in the zone used for fire extinguishing. The secondary piping system is arranged on the ceiling of the partition. In the secondary piping, it is installed at multiple sprinkler heads. The number of sprinkler heads is determined by the width of the partition.

The sprinkler head is a closed type sprinkler head and is provided with multiple holes for releasing water. The sprinkler head system has a heat-sensitive mechanism (fusible metal piece). Under normal circumstances, the connection between the water discharge hole and the secondary piping is covered in the sprinkler head. When the heat-sensitive mechanism melts due to the flames in a fire, it is blocked and opened, and water is discharged from the hole of the sprinkler head through the primary pipe.

The negative pressure system has a negative pressure piping connected to the secondary piping, and a negative pressure pump that creates negative pressure in the negative pressure piping. By simply connecting the negative pressure piping and the secondary piping, a negative pressure sprinkler system can be realized.

The negative pressure pump system generates negative pressure. The negative pressure pump can also be composed of a main machine and a preparation machine. In this case, the system can provide the usage of the entire facility during breakdown and maintenance. When used in medical facilities, the air containing inhaled bacteria and plural bacteria (bacteria) is collected through a suction filter in order to avoid contaminating the atmosphere.

The negative pressure piping connected to the negative pressure pump runs vertically from the negative pressure pump to the uppermost floor of the building and is branched on each floor. Negative pressure piping is branched on each floor, and negative pressure piping is laid out throughout each room. The negative pressure pump is connected to the negative pressure piping.

The negative pressure piping and the secondary piping system are connected at the connection point. Therefore, under normal conditions, there is a negative pressure within the secondary piping system.

When the negative pressure sprinkler system is a wet negative pressure sprinkler system, under normal conditions, there is a negative pressure in the secondary piping, and water exists in the secondary piping. By creating negative pressure, even if the sprinkler head is damaged, water can be prevented from being discharged from the sprinkler head. In order to prevent water from flowing from the secondary piping to the negative pressure pipe, a membrane or a gas-liquid separation device or the like that allows water vapor to pass but does not allow water to pass may also be installed near the connection point. Because there is negative pressure in the secondary piping, the water system evaporates. In order to replenish water, you can also open the valve when the water decreases and replenish water to the secondary piping.

When the negative pressure sprinkler system is a dry negative pressure sprinkler system, in the state, a negative pressure is created in the secondary piping, and there is no water in the secondary piping.

The detection system has fire detectors and computers. When a fire breaks out in a protected partition, the fire detector detects its heat or smoke. Use the signal line to connect the computer and the valve. Connect the computer and water pump with a signal cable.

The fire extinguishing system includes: a negative pressure sprinkler system, which has a sprinkler head and secondary piping used as sprinkler piping for supplying water to the sprinkler head. The secondary piping is maintained in a negative pressure state under normal conditions; negative pressure piping ; The negative pressure piping; and the negative pressure pump serve as a negative pressure device for supplying negative pressure to the secondary piping and the negative pressure piping.

Figure 2 is a schematic diagram of the fire extinguishing system before repair. As shown in FIG. 2 , the sprinkler system 1 as the fire extinguishing system before repair is installed on the first floor 100 as the first area (first protection zone), and on the second floor 100 as the second zone (second protection zone). 200 on the second floor. On the first floor 100, a pressurized sprinkler system 100a is provided. On the second floor 200, a pressurized sprinkler system 200a is provided. The pressurized sprinkler systems 100a and 200a can also be replaced with other sprinkler systems that are not negative pressure type.

Connect the primary piping 4 to the water pump 2 system. The output of the water pump 2 is controlled by the control device 3. The output of the water pump 2 can be continuously changed. Water is supplied to the water pump 2 from a water tank not shown in the figure. In this water, no impurities may be added, or rust inhibitors may be added.

The primary piping 101 for the first floor 100 is branched from the primary piping 4 . The primary piping 101 is connected to a valve 105 located at the boundary between the primary piping 101 and the secondary piping 102 . The opening and closing of the valve 105 is controlled by the control device 3 .

A plurality of sprinkler heads 103 are provided in the secondary piping 102 . The sprinkler head 103 is installed on the first floor 100. The sprinkler head 103 has a portion that is melted by heat during a fire. In the event of a fire, this part melts, and liquid (water) that is a fire extinguishing agent is supplied from the secondary pipe 102 to the first floor 100 via the sprinkler head 103 .

The secondary pipe 102 may or may not be filled with water.

On the first floor 100, a sensor 104 for sensing heat is provided. When the sensor 104 senses heat, it transmits the signal to the control device 3 . The control device 3 instructs the water pump 2 to increase the output of the water pump 2 . The control device 3 opens the valve 105. Even when the secondary piping 102 is not filled with water, the valve 105 is opened to fill the secondary piping 102 with water. However, the air in the secondary piping 102 is compressed and remains in the secondary piping 102 . When the secondary piping 102 is filled with water in advance, the valve 105 is opened and the water pressure in the secondary piping 102 increases.

When the meltable portion of the sprinkler head 103 is melted by heat, the water in the secondary pipe 102 is discharged to the first floor 100 via the sprinkler head 103 .

The primary piping 4 is connected to a valve 205 located at the boundary between the primary piping 4 and the secondary piping 202 . The opening and closing of the valve 205 is controlled by the control device 3 . The primary piping 4 is connected to the other primary piping 101 and 201 .

A plurality of sprinkler heads 203 are provided in the secondary piping 202 . The sprinkler head 203 is installed on the second floor 200. The sprinkler head 203 has a portion that is melted by heat during a fire. In the event of a fire, this part melts, and water serving as a fire extinguishing agent is supplied from the secondary pipe 202 to the second floor 200 via the sprinkler head 203 . The secondary pipe 202 may or may not be filled with water.

On the second floor 200, a sensor 204 for sensing heat is provided. When the sensor 204 senses heat, it transmits the signal to the control device 3 . The control device 3 instructs the water pump 2 to increase the output of the water pump 2 . The control device 3 opens the valve 205. Even when the secondary piping 202 is not filled with water, the valve 205 is opened to fill the secondary piping 202 with water. However, the air in the secondary piping 202 is compressed and remains in the secondary piping 202 . When the secondary piping 202 is filled with water in advance, the valve 205 is opened and the water pressure in the secondary piping 202 increases.

In the non-negative pressure sprinkler system and the negative pressure sprinkler system 100b, if the sensor 104 can be reused, it is reused.

When the meltable portion of the sprinkler head 203 is melted by heat, the water in the secondary pipe 202 is discharged to the second floor 200 via the sprinkler head 203 .

Figure 3 is a schematic diagram of the fire extinguishing system after repair. As shown in FIG. 3 , it is assumed that water leakage 110 occurs in the secondary piping 102 . In this case, the leakage point 110 is repaired from the outside. Furthermore, the secondary piping 102 is connected to the negative pressure pump 5 . A negative pressure pipe 109 is interposed between the secondary piping 102 and the negative pressure pump 5 . Thereby, the inside of the secondary piping 102 can be made into a negative pressure.

Figure 4 is a cross-sectional view of the leakage area. As shown in Figure 4, at the leakage point 110, the hole 1020 of the secondary pipe 102 is passed through. The hole 1020 is plugged with a repair material 111 from the outside of the secondary piping 102 .

In this example, the leakage point 110 occurs on the first floor 100. However, the leakage point may also occur on the secondary piping 202 of the second floor 200. In this case, the secondary piping 202 is connected to the negative pressure pump 5 while repairing the secondary piping 202 from the outside.

While making the secondary piping 102 of the first floor 100 have a negative pressure, the secondary piping 102 may or may not be filled with water. When filling with water, the water easily evaporates because the secondary pipe 102 has a negative pressure. When the water in the secondary piping 102 evaporates and the water level decreases, the valve 105 is opened to replenish water into the secondary piping 102 .

When the secondary piping 102 is not filled with water, it operates as a dry negative pressure sprinkler system.

In the sprinkler system 1, a negative pressure sprinkler system is installed on the first floor 100, and a sprinkler system that is not negative pressure is installed on the second floor 200. In addition, the first floor 100 may have a negative pressure sprinkler system, and the second floor may have a negative pressure sprinkler system.

However, when a water leak occurs not only in the secondary piping 102 of the first floor 100 but also in the secondary piping 202 of the second floor 200, the leakage is repaired from the outside of the secondary piping 202 by connecting the secondary piping 202 to the secondary piping 202. The piping 202 is connected to the negative pressure pump 5, and a negative pressure sprinkler system can also be formed on the second floor 200.

The hole 1020, which is a pinhole, is formed by oxygen and the like contained in the water in the pipe. Water flows out of the hole 1020 due to its presence. After the position of the hole 1020 is determined, the hole 1020 can be blocked by borrowing the repair material 111 from the outside.

As the repair material 111, there are aluminum tapes, tapes made of fiberglass cloth containing resin, and rubber tapes. Furthermore, the repair material 111 may be formed by welding a metal plate to the secondary piping 102 .

The negative pressure sprinkler system 100b is originally a pressurized or non-pressurized sprinkler system. Since the hole 1020 is formed, the hole 1020 is plugged and modified into a negative pressure type.

The sprinkler system 1 includes: a negative pressure sprinkler system 100b, which has a sprinkler head 103 and a secondary pipe 102 with a negative pressure inside that supplies water to the sprinkler head 103; and a negative pressure pump 5, which connects the negative pressure sprinkler system to the sprinkler head 103. 100b is maintained in a negative pressure state under normal conditions; a hole 1020 penetrating the secondary piping 102 in the thickness direction is formed in the secondary piping 102, and a repair material 111 is provided to close the opening of the hole 1020 from the outside of the secondary piping.

The operation of the negative pressure sprinkler system 100b will be described. When a fire occurs on the first floor 100 which is part of a protected zone, the fire sensor 104 detects the heat or smoke caused by the fire. The detected information is transmitted from the sensor 104 to the control device 3 which is a computer. The control device 3 supplies 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 . Thereby, in the dry-type negative pressure sprinkler system 100b, water is filled into the secondary piping 102, which does not exist in the normal system but is in a negative pressure state. In the wet negative pressure sprinkler system 100b, the normal system secondary piping 102 is in a negative pressure state and filled with water. At this time, the driving force of the negative pressure pump 5 can also be made weaker than in the steady state.

The heat caused by the fire causes the heat-sensitive mechanism of the sprinkler head 103 to melt. Thereby, the water discharge hole of the sprinkler head 103 and the secondary pipe 102 are connected. By opening the valve 105 and discharging water from the water discharging hole of the sprinkler head 103, the fire can be extinguished.

Compared with a dry sprinkler system (pre-action sprinkler system) with normal pressure in the normal secondary piping, the negative pressure sprinkler system 100b according to the embodiment has the following effects. In the normal pressure dry sprinkler system, the pump operates to fill the secondary piping with water during a fire. However, at this time, the air in the secondary piping is compressed by the water, so it cannot be smoothly filled into the secondary piping (at short time) fill with water. In contrast, in the wet-type negative pressure sprinkler system 100b, because the secondary pipe 102 is under negative pressure and filled with water, water can be sprinkled in advance from the sprinkler head 103. Therefore, the shortcoming of the conventional dry sprinkler system (pre-action sprinkler system), which is the delay in sprinkling water from the sprinkler head, can be solved. In the case of the dry-type negative pressure sprinkler system 100b, because the secondary pipe 102 is under negative pressure, water is quickly filled into the secondary pipe 102, and water can be sprinkled in advance from the sprinkler head 103.

Since the secondary piping 102 is used in a pressurized or non-pressurized sprinkler system, the manufacturing cost can be reduced compared with a new installation. Furthermore, the repair material 111 is affixed to the outside of the secondary piping 102, but since the inside of the secondary piping 102 is always at negative pressure, water leakage from the hole 1020 will not occur again.

The sprinkler system 1 as a fire extinguishing system is installed on the first floor 100 as the first area and the second floor 200 as the second area different from the first area. The fire extinguishing system is included in the first floor. The negative pressure sprinkler system 100b installed on the second floor 200 and the normal pressure or pressurized sprinkler system 200a installed on the second floor 200. Alternatively, the first floor 100 may be the second area, and the second floor 200 may be the first area.

In the fire extinguishing system constructed in this way, a sprinkler system of the required form can be installed where needed. In addition, as a manufacturing method, a method of repairing the hole 1020 with the repair material 111 is shown, but the hole 1020 may not necessarily be provided. When the hole 1020 is not provided, the repair material 111 is not provided.

Figure 5 is a schematic diagram of a fire extinguishing system based on other forms. As shown in FIG. 5 , in the fire extinguishing system according to another form, no sensor is installed on the second floor 200 , which is different from the fire extinguishing system 1 shown in FIGS. 3 and 4 . The normal pressure or pressurized sprinkler system 200a on the second floor 200 has a sprinkler head 203. The metal in the sprinkler head 203 is melted by the heat of the fire, and the sprinkler head 203 releases water without a signal from the sensor. water. That is, the sprinkler head 203 is not connected to the control device 3 . In addition, in this embodiment, like the embodiment of FIGS. 3 and 4 , the first floor 100 may be the second area and the second floor 200 may be the first area. Furthermore, it can also be manufactured using a manufacturing method in which the hole 1020 of the secondary pipe 102 is provided and repaired with the repair material 111 . In addition, the hole 1020 of the secondary piping 102 may not necessarily be provided. When the hole 1020 is not provided, the repair material 111 is not provided.

When the sprinkler head 203 discharges water without a signal from the sensor and control device 3, the factor that determines the discharge condition of the water from the sprinkler head 203 on the second floor 200 is only the melting temperature of the metal in the sprinkler head 203. , and the control of release conditions becomes simpler. Therefore, the sprinkler system 1 can be introduced at low cost.

A fire extinguishing system according to one form is provided in at least any one of a first area and a second area different from the first area, and includes a negative pressure sprinkler system having a sprinkler head. , and a secondary piping with negative pressure inside that supplies water to the sprinkler head; and a negative pressure pump that maintains the negative pressure sprinkler system in a negative pressure state in the normal state; the secondary piping system is formed in the thickness direction and runs through the The hole of the secondary piping further has a repair material that closes the opening of the hole from the outside of the secondary piping.

In the fire extinguishing system configured in this way, since there is a repair material that closes the opening of the hole from the outside of the secondary piping, even if the pressure inside the secondary piping becomes negative, outside air will not be introduced through the hole.

According to one form of manufacturing method of a fire extinguishing system, the sprinkler system having sprinkler piping that stores water in a normal state is installed on the first floor of the building and above or below the first floor. On the second floor of the building, specify the leakage point of the sprinkler pipe from either the first floor or the second floor, and attach the repair material to the sprinkler pipe in a manner that plugs the leakage point. After the outside, connect the negative pressure pump and the sprinkler with piping to form a negative pressure sprinkler system.

In the manufacturing method of the fire extinguishing system constructed in this way, a negative pressure sprinkler system can be formed by repairing the sprinkler system that stores water in a normal state. As a result, a negative pressure sprinkler system can be manufactured at low cost.

According to another method of manufacturing a fire extinguishing system, a sprinkler system having sprinkler piping that does not normally store water is installed on the first floor of a building and above the first floor. or the second floor below, specify the leakage point of the sprinkler pipe from any one of the first floor and the second floor, and attach the repair material to the sprinkler pipe by plugging the leakage point. After removing the outside of the piping, connect the negative pressure pump to the sprinkler piping to form a negative pressure sprinkler system.

In the manufacturing method of the fire extinguishing system constructed in this way, a negative pressure sprinkler system can be formed by repairing the sprinkler system that does not store water in normal conditions. As a result, a negative pressure sprinkler system can be manufactured at low cost. Appendix 1 refers to a fire extinguishing system, which is installed in at least any one of a first area and a second area different from the first area. It includes: a negative pressure sprinkler system with a sprinkler head. , and a secondary piping with negative pressure inside that supplies water to the sprinkler head; and a negative pressure pump that maintains the negative pressure sprinkler system in a negative pressure state in the normal state; the secondary piping system is formed in the thickness direction and runs through the The hole of the secondary piping further has a repair material that closes the opening of the hole from the outside of the secondary piping. Supplementary Note 2 is a method of manufacturing a fire extinguishing system in which a sprinkler system having sprinkler piping that stores water in a normal state is installed in a first area and a second area different from the first area, specifically from the third area. At the leakage point of the sprinkler piping in any one of the first area and the second area, the repair material is attached to the outside of the sprinkler piping to plug the leakage, and then the negative pressure pump is connected to the leakage point. The sprinklers are connected with pipes to form a negative pressure sprinkler system. Supplementary Note 3 is a method of manufacturing a fire extinguishing system in which a sprinkler system having sprinkler piping that does not normally store water is installed in a first area and a second area different from the first area, specifically from the At the leakage point of the sprinkler piping in either the first area or the second area, a repair material is attached to the outside of the sprinkler piping to plug the leakage point, and then the negative pressure pump is Connect to the sprinkler with piping to form a negative pressure sprinkler system.

It should be considered that the embodiments disclosed this time are examples in all matters and are not intended to be limiting. The scope of the present invention is shown not by the above-mentioned embodiments but by the scope of the patent claims, and it is intended that all changes within the scope and equivalent meanings of the patent claims are included.

1:Sprinkler system 2:Water pump 3:Control device 4,101,201: Primary piping 5: Negative pressure pump 100:First floor 100a, 200a: Pressurized sprinkler system 100b: Negative pressure sprinkler system 102,202: Secondary piping 103,203:Sprinkler head 104,204: Sensor 105,205: valve 109: Negative pressure tube 110:Leakage 111:Repair materials 200:Second floor 1020:hole S301, S302, S303: steps

[Figure 1] is a diagram illustrating the manufacturing method of the fire extinguishing system. [Figure 2] is a schematic diagram of the fire extinguishing system before repair. [Figure 3] is a schematic diagram of the repaired fire extinguishing system. [Fig. 4] This is a cross-sectional view of the water leakage area enlarged and showing the portion surrounded by IV in Figs. 3 and 5. [Figure 5] is a schematic diagram of a fire extinguishing system based on other forms.

1:Sprinkler system

2:Water pump

3:Control device

4,101,201: Primary piping

5: Negative pressure pump

100:First floor

100b: Negative pressure sprinkler system

102,202: Secondary piping

103,203:Sprinkler head

104,204: Sensor

105,205: valve

109: Negative pressure tube

110:Leakage

111:Repair materials

200:Second floor

200a: Pressurized sprinkler system

Claims (3)

A fire extinguishing system that is installed in a first area of the same building and a second area that is different from the first area. It includes: a negative pressure sprinkler system installed in the first area. ; And the normal pressure or pressurized sprinkler system installed in the second area. For example, the fire extinguishing system of claim 1, wherein the normal pressure or pressurized sprinkler system of the second area has a sprinkler head, and the metal in the sprinkler head is melted by the heat of the fire. On signal, water is discharged from the sprinkler head. For example, the fire extinguishing system of claim 1 or 2, wherein the negative pressure sprinkler system includes: a negative pressure pump; and a secondary piping connected to the negative pressure pump and having a hole in which a hole is borrowed from the outside of the secondary piping. The hole is closed with a repair material.

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