Sprinkler extinguishment installation

Abstract

To provide an extinguishment system that does not discharge water even when a sprinkler head is broken.SOLUTION: An extinguishment system 1 includes: a negative pressure sprinkler system 100 that has a sprinkler head 103 and a secondary pipe 102 for supplying water to the sprinkler head 103, and in which the sprinkler pipe 102 is maintained in a negative pressure state in a normal state; and a negative pressure pump 204 that makes the pressure inside the sprinkler pipe to be a negative pressure.SELECTED DRAWING: Figure 1

Description

[Technical field]

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

[0002] Conventionally, a sprinkler is disclosed in JP 2022-105660 A (Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2022-105660 A Summary of the Invention [Problem to be solved by the invention]

[0004] Conventional sprinkler systems have the problem of being prone to malfunction. [Means for solving the problem]

[0005] A sprinkler fire extinguishing equipment to be installed in a fire compartment, the equipment comprising: a sprinkler head, a sprinkler pipe for supplying water to the sprinkler head, and a valve connected to the sprinkler pipe, the sprinkler pipe being normally maintained at a negative pressure state; a negative pressure device capable of supplying negative pressure to the sprinkler pipe; a monitor unit for monitoring the negative pressure sprinkler system; a fire detector for detecting a fire within the fire compartment; and a control unit connected to the monitor unit and the fire detector, the monitor unit sending a signal to the control unit, and when the fire detector sends a signal to the control unit, the control unit opens the valve and causes water to be released from the sprinkler head.

[0006] "Normal state" refers to a normal state, i.e., a state in which no fire has occurred. In a sprinkler fire extinguishing system configured in this manner, the monitor unit sends a signal to the control unit, and when the detector sends a fire signal to the control unit, the valve opens and water is released from the sprinkler head.Since a fire is detected by two signals, malfunction of the sprinkler fire extinguishing system can be prevented. [Brief description of the drawings]

[0007] [Figure 1] FIG. 1 is a schematic diagram of a sprinkler fire extinguishing system according to a first embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] (Embodiment 1) (Configuration of sprinkler fire extinguishing equipment) Fig. 1 is a schematic diagram of a sprinkler fire extinguishing system according to embodiment 1. As shown in Fig. 1, the sprinkler fire extinguishing system 1 is installed in a building 10. The building 10 has a first compartment 11 which is a lower floor, and a second compartment 12 which is a fire compartment on an upper floor.

[0009] The negative pressure sprinkler system 100 has a primary piping 101, a secondary piping 102 connected to the primary piping 101, a sprinkler head 103 provided on the secondary piping 102, a valve 105 provided at the boundary between the primary piping 101 and the secondary piping 102, and a water pump 106 for supplying water to the primary piping 101.

[0010] The primary piping 101 is filled with water. This water is pressurized by a water pump 106. The water pump 106 is supplied with water from a fire extinguishing water tank (not shown). Water may also be supplied to the water pump 106 from an elevated water tank on the top floor of the building 10.

[0011] The primary piping 101 rises vertically from the water pump 106 to the top of the building 10, and branches off at each floor. In this embodiment, the building 10 has two floors, but the number of floors of the building 10 is not limited to two.

[0012] The water in the primary pipe 101 is stopped by a valve 105, and when the valve 105 is opened, the water in the primary pipe 101 is sent to the secondary pipe 102. The opening and closing of the valve 105 is controlled by a control unit 302 constituted by a computer.

[0013] The secondary piping 102 is connected to a valve 105. The secondary piping 102 is disposed in the second section 12. Although this embodiment shows an example in which the valve 105 is disposed in the second section 12, the valve 105 may be disposed in the first section 11.

[0014] The secondary piping 102 is disposed on the ceiling of the second section 12. The secondary piping 102 is provided with a plurality of sprinkler heads 103. The number of sprinkler heads 103 is determined depending on the size of the second section 12.

[0015] In this embodiment, an example is shown in which the sprinkler head 103 is provided in the second section 12, but the secondary piping 102 and the sprinkler head 103 may be arranged in the first section 11.

[0016] The sprinkler head 103 is a closed type sprinkler head and has multiple holes for discharging water. The sprinkler head 103 has a heat-sensitive mechanism (fusible metal pieces). Normally, the holes for discharging water and the secondary piping 102 are shielded inside the sprinkler head 103. When the heat-sensitive mechanism melts due to flames during a fire, the shielding is released. A valve 105 is opened and water is discharged from the holes of the sprinkler head 103 via the primary piping 101 and the secondary piping 102.

[0017] The negative pressure system 200 has a negative pressure pipe 201, a negative pressure pump 204 that creates a negative pressure inside the negative pressure pipe 201, and a connecting pipe 205 that connects the negative pressure pipe 201 and the secondary pipe 102. A negative pressure sprinkler system can be realized simply by providing the connecting pipe 205 in the compartment and connecting the negative pressure pipe 201 and the secondary pipe 102. As described below, the negative pressure system 200 does not need to be provided when the secondary pipe 102 is kept at normal pressure. As described below, the negative pressure system is replaced with a pressurizing system to pressurize the secondary pipe 102. In this case, the negative pressure pump 204 becomes a pressurizing pump (compressor).

[0018] The negative pressure pump 204 is provided in the first compartment 11 and generates a negative pressure. The negative pressure pump 204 is configured by a negative pressure pump. In this embodiment, the water pump 106 and the negative pressure pump 204 are provided in the same first compartment 11, but they may be provided in different compartments.

[0019] Negative pressure piping 201 connected to negative pressure pump 204 rises vertically from negative pressure pump 204 to the top floor of building 10, and branches off at each floor. At each floor, negative pressure piping 201 branches off and is laid out in each room. Sprinkler fire extinguishing system 1 includes secondary piping 102 as sprinkler piping, and negative pressure pump 204 as a first negative pressure device for supplying negative pressure to negative pressure piping 201. Note that in this embodiment, two negative pressure pumps, negative pressure pump 204 and second negative pressure pump, are provided, but it is sufficient that at least negative pressure pump 204 is provided.

[0020] A negative pressure pump 204 may be used as a vacuum pump for maintaining a negative pressure inside the building 10. A plurality of negative pressure pumps 204 may be provided.

[0021] The negative pressure pipe 201 and the secondary pipe 102 are connected by a connecting pipe 205. The connecting pipe 205 and the secondary pipe 102 are connected at a connection point 202. As a result, the inside of the secondary pipe 102 is normally kept at negative pressure.

[0022] Under normal conditions, the secondary piping 102 is under negative pressure and no water is present. By creating a negative pressure, it is possible to prevent water from accumulating in the secondary piping 102. Even if water does accumulate in the secondary piping 102, the boiling point of water is lowered under negative pressure. Therefore, the water in the secondary piping 102 boils and is sucked by the negative pressure pump 204 via the connecting pipe 205. An electromagnetic valve 501 is provided in the connecting pipe 205. In the case of a wet-type vacuum sprinkler fire extinguishing system, the secondary piping 102 can be made under negative pressure (negative pressure) by opening the electromagnetic valve 501, and the water in the secondary piping 102 can be sucked.

[0023] The detection system 300 has a fire detector 301 and a control unit 302. When a fire breaks out in the second compartment 12, the fire detector 301 detects the heat or smoke. The control unit 302 and the valve 105 are connected by a signal line 311. The control unit 302 and the water pump 106 are connected by a signal line 312. The control unit 302 and the monitor unit 109 are connected by a signal line 313. The control unit 302 and the fire detector are connected by a signal line 314.

[0024] The monitor unit 109 is capable of detecting changes in flow rate, pressure, sound, temperature, wind speed, impact, and the like in the secondary piping 102 when the sprinkler head 103 is activated. Data relating to the flow rate, pressure, or sound of the gas in the secondary piping 102 detected by the monitor unit 109 is sent from the control unit 302 via a signal line 313. A chamber 500 is provided near the monitor unit 109. The chamber 500 is in communication with the secondary piping 102.

[0025] The control unit 302 can control the output of the water pump 106 and the negative pressure pump 204. The lower the pressure in the secondary piping 102, the faster the speed at which water fills the secondary piping 102. Therefore, by increasing the output of the negative pressure pump 204 to increase the degree of vacuum in the secondary piping 102 (reducing the pressure in the secondary piping 102), it is possible to quickly fill the secondary piping 102 with water in the event of a fire.

[0026] The sprinkler fire extinguishing equipment 1 installed in a fire compartment has a negative pressure sprinkler system 100. The negative pressure sprinkler system 100 has a sprinkler head 103, a secondary pipe 102 as a sprinkler pipe for supplying water to the sprinkler head 103, and a valve 105 connected to the secondary pipe 102. The secondary pipe 102 is normally maintained in a negative pressure state.

[0027] The sprinkler fire extinguishing system 1 comprises a negative pressure system 200 as a negative pressure device capable of supplying negative pressure to the sprinkler piping, a monitor unit 109 that monitors the negative pressure sprinkler system, a fire detector 301 that detects a fire within the fire compartment, and a control unit 302 connected to the monitor unit 109 and the fire detector 301.

[0028] When the monitor unit 109 sends a signal to the control unit 302 and the fire detector 301 sends a signal to the control unit 302, the control unit 302 opens the valve 105 and water is discharged from the sprinkler head 103.

[0029] (Sprinkler fire extinguishing system operation) When a fire breaks out in the second compartment 12, the fire detector 301 detects the heat or smoke caused by the fire. The detected information is sent from the fire detector 301 to the control unit 302. The heat from the fire melts the heat-sensing mechanism of the sprinkler head 103. This connects the water discharge holes of the sprinkler head 103 to the secondary piping 102. This increases the change in the gas flow rate and pressure in the connecting pipe 205. The change in flow rate, pressure, or sound is detected by the monitor unit 109. The monitor unit 109 transmits this information to the control unit 302.

[0030] The control unit 302 determines that a fire has actually occurred based on a signal from the fire detector 301 that a fire has occurred and a change in the gas flow rate, pressure, or sound in the connecting pipe 205 that is equal to or greater than a predetermined value from the monitor unit 109, and sends a signal to open the valve 105. This causes water to be supplied from the primary pipe 101 to the secondary pipe 102, and water to be discharged from the sprinkler head 103.

[0031] The reason why the control unit 302 judges whether or not to disclose information is because there is a possibility that if only one of the information is received, it will be judged as disclosure due to a false alarm.

[0032] For example, if the control unit 302 were to determine disclosure based only on the fire detector 301, when the fire detector 301 malfunctions, the control unit 302 may determine that there is a fire and open the valve 105. In this case, the secondary piping 102 will be filled with water, making it difficult to drain the water from the secondary piping 102 in the subsequent process.

[0033] On the other hand, if the control unit 302 were to determine disclosure based only on the monitor unit 109, when the sprinkler head 103 deteriorates and air passes through, the control unit 302 may determine that there is a fire and open the valve 105. In this case, the secondary piping 102 will be filled with water, causing a malfunction in which water is released from the deteriorated sprinkler head 103.

[0034] (effect) In the sprinkler fire extinguishing system 1 configured in this manner, the control unit 302 determines that there is a fire based on two pieces of information, and therefore, is less likely to make an erroneous determination compared to when disclosure is determined based on only one piece of information.

[0035] Furthermore, since the inside of the secondary piping 102 is kept in a reduced pressure state of less than 1 atmosphere, water is quickly filled into the secondary piping 102, enabling early extinguishing of the fire.

[0036] When the secondary pipe 102 is decompressed and the sprinkler head 103 is activated, air is sucked from the sprinkler head 103 into the secondary pipe 102, and further into the chamber 500, so that the monitor unit 109 detects the flow rate or pressure change in the secondary pipe 102 and the chamber 500. In addition, the system does not detect gradual changes in flow rate or pressure due to changes in temperature or pinholes and leaks in the pipe, but can detect a certain level of flow rate or pressure change when the sprinkler head 103 is activated. Compared to when the secondary pipe 102 is pressurized, the change in flow rate or pressure is small even if there is a temperature change. When the secondary pipe 102 is pressurized, there is a lot of gas in the secondary pipe 102, so the pressure or volume of the gas changes greatly with temperature changes. Therefore, when the temperature of the secondary pipe 102 fluctuates due to changes in temperature, the pressure and volume of the gas in the secondary pipe 102 also fluctuate. If the pressure in the secondary pipe 102 is less than 1 atmosphere, the pressure and volume fluctuations due to temperature fluctuations can be reduced.

[0037] When monitor unit 109 measures the pressure or flow rate of the gas, monitor unit 109 is configured with, for example, a pressure gauge, a flow meter, an anemometer, a temperature sensor, an accelerometer, etc. Monitor unit 109 is preferably provided in secondary piping 102 so that it can measure changes in flow rate or pressure of the gas regardless of which sprinkler head 103 the gas flows through.

[0038] When monitor unit 109 detects sound, monitor unit 109 is configured with, for example, an ultrasonic camera. When the heat-sensitive mechanism of sprinkler head 103 melts, sound is generated. When the ultrasonic camera detects this sound, it is possible to detect that the heat-sensitive mechanism of sprinkler head 103 has melted. When an ultrasonic camera is provided, it is preferable to provide the ultrasonic camera in a portion where multiple sprinkler heads 103 are within the field of view.

[0039] When detecting sound, the pressure inside the secondary pipe 102 may be pressurized (more than 1 atmosphere), reduced (less than 1 atmosphere), or normal pressure (1 atmosphere). The sound of the heat-sensitive mechanism melting occurs regardless of the pressure inside the secondary pipe 102. If the pressure inside the secondary pipe 102 is normal, there is no need to provide the negative pressure system 200.

[0040] (Appendix 1) A sprinkler fire extinguishing system installed in a fire compartment, a sprinkler head, a sprinkler pipe for supplying water to the sprinkler head, and a valve connected to the sprinkler pipe, the sprinkler pipe being normally maintained in a negative pressure state; A negative pressure device capable of supplying negative pressure to the sprinkler piping; A monitor unit that monitors the negative pressure sprinkler system; A fire detector that detects a fire in the fire compartment; A control unit connected to the monitor unit and the fire detector, The monitor unit sends a signal to a control unit, and when the sensor sends a signal to the control unit, the control unit opens the valve and water is discharged from the sprinkler head.

[0041] (Appendix 2) The sprinkler fire extinguishing system of claim 1, wherein the monitor unit measures the flow rate or pressure of gas in the sprinkler piping.

[0042] (Appendix 3) 2. The sprinkler fire extinguishing system of claim 1, wherein the monitor unit detects sound from the sprinkler head.

[0043] (Appendix 4) 4. The sprinkler fire extinguishing system of claim 3, wherein the sound is any one of the sound of gas leaking from the sprinkler head, the sound of gas being sucked into the sprinkler head, and the sound of a heat-sensing mechanism of the sprinkler head melting.

[0044] (Appendix 11) A sprinkler fire extinguishing system installed in a fire compartment, a sprinkler system including a sprinkler head, a sprinkler pipe for supplying water to the sprinkler head, and a valve connected to the sprinkler pipe, the sprinkler pipe being normally maintained in a pressurized state; A pressurizing device capable of supplying pressurization to the sprinkler piping; A monitor unit that monitors the pressurized sprinkler system; A fire detector that detects a fire in the fire compartment; A control unit connected to the monitor unit and the fire detector, The monitor unit sends a signal to a control unit, and when the sensor sends a signal to the control unit, the control unit opens the valve and water is discharged from the sprinkler head.

[0045] (Appendix 12) The sprinkler fire extinguishing system of claim 11, wherein the monitor unit measures a flow rate of gas in the sprinkler piping.

[0046] (Appendix 13) 12. The sprinkler fire extinguishing system of claim 11, wherein the monitor unit detects sound from the sprinkler head.

[0047] (Appendix 14) 14. The sprinkler fire extinguishing system of claim 13, wherein the sound is any one of the sound of gas leaking from the sprinkler head, the sound of gas being sucked into the sprinkler head, and the sound of a heat-sensing mechanism of the sprinkler head melting.

[0048] (Appendix 21) A sprinkler fire extinguishing system installed in a fire compartment, A sprinkler system including a sprinkler head, a sprinkler piping for supplying water to the sprinkler head, preferably a normal pressure, a pressure, or a vacuum piping, and a valve connected to the sprinkler piping; A monitor unit that monitors the sprinkler system; A fire detector that detects a fire in the fire compartment; A control unit connected to the monitor unit and the fire detector, The sprinkler fire extinguishing system includes a monitor unit that sends a signal to a control unit, and when the detector sends a signal to the control unit, the control unit opens the valve and discharges water from the sprinkler head. In this case, the monitor unit can detect a fire regardless of the pressure in the sprinkler piping.

[0049] (Appendix 22) The sprinkler fire extinguishing system according to claim 21, wherein the monitor unit detects a sound from the sprinkler head, the sound being a sound of a heat-sensitive mechanism of the sprinkler head melting. In this case, an ultrasonic camera can be used as the monitor unit.

[0050] The embodiments disclosed herein are illustrative in all respects and should not be considered as limiting. The scope of the present invention is defined by the claims rather than the above-described embodiments, and it is intended to include the equivalent meaning of the claims and all modifications within the scope of the claims. [Explanation of symbols]

[0051] 1 sprinkler fire extinguishing system, 10 building, 11 first section, 12 second section, 100 negative pressure sprinkler system, 101 primary piping, 102 secondary piping, 103 sprinkler head, 105 valve, 106 water pump, 109 monitor section, 200 negative pressure system, 201 negative pressure piping, 202 connection point, 204 negative pressure pump, 205 connecting pipe, 300 detection system, 301 fire detector, 302 computer, 311, 312, 313, 314 signal line, 500 chamber, 501 solenoid valve.

Claims

[Claim 1] A sprinkler fire extinguishing system installed in a fire compartment, a sprinkler head, a sprinkler pipe for supplying water to the sprinkler head, and a valve connected to the sprinkler pipe, the sprinkler pipe being normally maintained in a negative pressure state; A negative pressure device capable of supplying negative pressure to the sprinkler piping; A monitor unit that monitors the negative pressure sprinkler system; A fire detector that detects a fire in the fire compartment; A control unit connected to the monitor unit and the fire detector, A sprinkler fire extinguishing system in which the monitor unit sends a signal to the control unit, and when the fire detector sends a signal to the control unit, the control unit opens the valve and water is discharged from the sprinkler head.

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