Sprinkler system

Abstract

To solve the problem that it is difficult to specify a condition for operating sprinkler equipment.SOLUTION: A sprinkler system includes a pipe in which a vacuum or a compressible fluid is present at a pressure different from that of outside air, a closed sprinkler head provided in the pipe, a chamber provided in the pipe, and a detector provided between the pipe and the chamber to detect a flow of the compressible fluid.SELECTED DRAWING: Figure 1

Description

[Technical Field]

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

[0002] A conventional sprinkler device is disclosed in, for example, Japanese Patent Laid-Open Publication No. 2024-17628 (Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2024-17628 Summary of the Invention [Problem to be solved by the invention]

[0004] Conventional sprinkler systems have a problem in that it is difficult to specify the conditions for operating the sprinkler system. [Means for solving the problem]

[0005] A sprinkler system according to the present invention comprises a pipe in which a vacuum or a compressible fluid exists at a pressure different from that of the outside air, a closed sprinkler head provided on the pipe, a chamber provided on the pipe, and a detector provided between the pipe and the chamber for detecting the flow of the compressible fluid.

[0006] In a sprinkler system configured in this way, when a closed sprinkler head is broken and fluid flows between the outside air and the piping, a large fluid flow occurs around the chamber because a chamber is provided, which makes it easier to detect with a detector and identify the conditions for activating the sprinkler system.

[0007] Preferably, the system further comprises a valve provided between the piping and the detector. In a sprinkler system configured in this way, when water flows into the pipe, the valve closes to prevent water from flowing into the detector and chamber, resulting in water being supplied to the sprinkler head quickly.

[0008] Preferably, the sprinkler system further comprises a fire detector, and water is sent to the pipe when the fire detector detects a fire and the detector detects a flow of compressible fluid.

[0009] In a sprinkler system configured in this manner, if the fire detector detects a fire and the detector also detects the flow of fluid in the piping, it is determined to be a fire and water is sent to the piping, so it is possible to reliably detect a fire and activate the sprinkler system. [Brief explanation of the drawings]

[0010] [Figure 1] FIG. 1 is a schematic diagram of a sprinkler system 100 according to a first embodiment. [Figure 2] FIG. 2 is a diagram showing the chamber 101, the detector 102, the chamber valve 103, and the fixing jig 141 used in the first embodiment. [Figure 3] FIG. 3 is a graph showing the time from activation of the closed sprinkler head 123, the flow rate of air flowing through the secondary piping 111, the pressure in the chamber 101, the pressure in the secondary piping 111, and the pressure of air flowing through the sprinkler head 123 according to Example 1. [Figure 4] FIG. 4 is a graph showing the relationship between the time from activation of the closed sprinkler head 123 and the flow rate of air flowing through the secondary piping 111 when the volume of the secondary piping 111 is 2.8 m3 and the volume of the chamber 101 is changed according to Example 2. [Figure 5]Figure 5 is a graph showing the relationship between the time from activation of the closed sprinkler head 123 and the flow rate of air flowing through the secondary piping 111 when the volume of the chamber 101 is 0.5 dm3 and the volume of the secondary piping 111 is changed, according to Example 3. DETAILED DESCRIPTION OF THE INVENTION

[0011] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following embodiments, the same or corresponding parts are designated by the same reference numerals, and description thereof will not be repeated.

[0012] (Embodiment 1) Fig. 1 is a schematic diagram of a sprinkler system 100 according to an embodiment. As shown in Fig. 1, the sprinkler system 100 includes a chamber 101, a detector 102, a chamber valve 103, a branch pipe 113, and a secondary pipe 111. The sprinkler system 100 also includes a primary pipe 107, a primary control valve 108, a pre-action flow detection device 109, a secondary control valve 110, the secondary pipe 111, a sprinkler head 121, a vent valve 114, a compound gauge or pressure gauge 115, and an end-of-pipe test valve 116.

[0013] The sprinkler system 100 includes a fire detector 131, an automatic fire receiver 132, a sprinkler central monitoring panel 133, and a vacuum pump unit control panel 134.

[0014] This embodiment shows a pre-action sprinkler system 100. The sprinkler system 100 will not discharge water unless a fire detector 131 is activated, even if sprinkler heads 121, 122, 123 are damaged. A primary pipe 107 is connected to a pump, and water is supplied to the primary pipe 107. A pre-action water flow detection device 109 is provided between a primary control valve 108 and a secondary control valve 110. The secondary pipe 111 is filled with compressed air, or the secondary pipe 111 is in a reduced pressure state. The interior of the secondary pipe 111 and the interior of the chamber 101 are at the same pressure.

[0015] The branch pipe 113 branches off from the secondary pipe 111. A chamber valve 103 and a detector 102 are connected to the branch pipe 113. The chamber valve 103 and the detector 102 are provided between the branch pipe 113 and the chamber 101. The detector 102 is provided in a location close to the chamber 101. This is for the purpose of detecting the flow rate of air, which is a compressible fluid, in the vicinity of the chamber 101. Note that the secondary pipe 111 may be filled with a compressible fluid other than air.

[0016] The chamber valve 103 is closed when the secondary pipe 111 is filled with water. Closing the chamber valve 103 prevents the water in the secondary pipe 111 from flowing into the chamber 101. This ensures that water is sent to the sprinkler heads 121, 122, and 123.

[0017] Sprinkler heads 121, 122, and 123 are provided on secondary piping 111. Sprinkler heads 121, 122, and 123 have a fusible alloy (low-melting-point alloy-solder) sealed in a plunger. When a fire causes the temperature of sprinkler heads 121, 122, and 123 to rise and the fusible alloy melts, the components that make up sprinkler heads 121, 122, and 123 break down and fall, causing water to be sprayed from the outlet.

[0018] The terminal test valve 116 is installed in the section of the secondary piping 111 where the discharge pressure is expected to be the lowest. A vent valve 114 and a compound gauge or pressure gauge 115 are provided near the terminal test valve 116. One set of the vent valve 114, compound gauge or pressure gauge 115, and terminal test valve 116 is provided for each piping system.

[0019] A pre-action type water flow detection device 109 is connected to 112. An inflow monitoring switch 104 and a vacuum monitoring switch 105 are connected to the pre-action type water flow detection device 109. The vacuum monitoring switch 105 is provided when the pressure inside the secondary piping 111 is reduced, but the vacuum monitoring switch 105 is not provided when the pressure inside the secondary piping 111 is increased.

[0020] The pre-action water flow detection device 109 is connected to a sprinkler control panel 106. In the event of a fire, the pre-action water flow detection device 109 is opened by a signal from the sprinkler control panel 106. This causes pressurized water in the primary piping 107 to be supplied to the secondary piping 111.

[0021] In the event of a fire, the fire detector 131 detects flames or smoke from the flame 200. The fire detector 131 sends a signal to the automatic fire receiver 132. The automatic fire receiver 132 sends a signal to the sprinkler central monitoring panel 133 notifying it of the occurrence of a fire. The sprinkler central monitoring panel 133 sends a signal to the vacuum pump unit control panel 134 and the sprinkler control panel 106. The sprinkler central monitoring panel 133 sends a signal to the pump to send pressurized water to the primary piping 107. The pump sends pressurized water to the primary piping 107. In addition, the vacuum pump unit control panel 134 prevents the vacuum pump from starting.

[0022] The heat of flame 200 melts the fusible alloy in sprinkler head 123. In this embodiment, flame 200 occurs near sprinkler head 123, melting sprinkler head 123. If flame 200 occurs near sprinkler head 121 or sprinkler head 122, flame 200 will melt sprinkler head 121 or sprinkler head 122.

[0023] When the fusible alloy in the sprinkler head 123 melts and the sprinkler head 123 breaks down, air flows from the sprinkler head 123 into the secondary piping 111 if the pressure inside the secondary piping 111 is reduced. When the pressure inside the secondary piping 111 is reduced, the pressure inside the chamber 101 is also reduced, so this air flow reaches the chamber 101. The detector 102 detects this air flow. A signal detected by the detector 102 is sent to the sprinkler control panel 106. In addition, the sprinkler control panel 106 sends a signal to the chamber valve 103 to close the valve.

[0024] When the fusible alloy in the sprinkler head 123 melts and the sprinkler head 123 disintegrates, if the inside of the secondary piping 111 is pressurized, air flows from the secondary piping 111 to the sprinkler head 123. If the inside of the secondary piping 111 is pressurized, the inside of the chamber 101 is also pressurized, and air flows from the chamber 101 to the detector 102 and chamber valve 103. The detector 102 detects this air flow. A signal detected by the detector 102 is sent to the sprinkler control panel 106.

[0025] The sprinkler control panel 106 determines that a fire has occurred based on two signals: signals from the fire detector 131, automatic fire receiver 132, and sprinkler central monitoring panel 133, and a signal from the detector 102. The sprinkler control panel 106 sends a signal to open the pre-action water flow detection device 109. The sprinkler control panel 106 sends a signal to close the chamber valve 103. This causes pressurized water to flow through the primary side control valve 108, the pre-action water flow detection device 109, and the secondary side control valve 110, and then flows in the secondary piping 111 as shown by arrow 112. The pressurized water is sprayed from the sprinkler head 123, making it possible to extinguish the flame 200.

[0026] 2 is a diagram showing the chamber 101, the detector 102, the chamber valve 103, and the fixing jig 141 used in the embodiment 1. As shown in FIG. 2, by attaching the chamber 101, the detector 102, and the chamber valve 103 to the fixing jig 141, the chamber 101, the detector 102, and the chamber valve 103 can be easily installed in the sprinkler system 100.

[0027] In the first embodiment, the sprinkler system 100 includes secondary piping 111 as piping in which a vacuum or a compressible fluid exists at a pressure different from that of the outside air, closed sprinkler heads 121, 122, and 123 provided on the secondary piping 111, a chamber 101 provided on the secondary piping 111, and a detector 102 that detects the flow of the compressible fluid and is provided between the secondary piping 111 and the chamber 101. The sprinkler system 100 further includes a chamber valve 103 provided between the secondary piping 111 and the detector 102. The sprinkler system 100 further includes a fire detector 131. When the fire detector 131 detects a fire and the detector 102 detects the flow of the compressible fluid, water is sent to the secondary piping 111.

[0028] (Embodiment 2) The second embodiment is the same as the first embodiment except for 131 and 132. The first embodiment has a pre-action sprinkler system 100, but the second embodiment has a sprinkler system 100 that is not a pre-action type.

[0029] In the pre-action sprinkler system 100, the sprinkler control panel 106 judges a fire based on both signals from the fire detector 131, the automatic fire receiver 132, and the sprinkler central monitoring panel 133, and a signal from the detector 102. However, in the second embodiment, the sprinkler central monitoring panel 133 judges a fire based only on the signal from the detector 102.

[0030] (Embodiment 3) In the third embodiment, if the detector 102 breaks down, the vacuum monitoring switch 105 serves as a backup, detecting a pressure change in the secondary piping 111 and outputting a signal to the sprinkler control panel 106. This allows the sprinkler system 100 to be activated even if the detector 102 breaks down. In other words, both the detector 102 and the vacuum monitoring switch 105 are used to detect that the sprinkler heads 121, 122, and 123 have been activated.

[0031] Example 1 3 is a graph showing the time from activation of the closed-type sprinkler head 123, the flow rate of air flowing through the secondary piping 111, the pressure in the chamber 101, the pressure in the secondary piping 111, and the pressure of air flowing through the sprinkler head 123 according to Example 1. In Example 1, the volume inside the secondary piping 111 is set to 2.8 m 3 , the volume in the chamber 101 is 0.5 dm 3 It was confirmed that in this case, the detector 102 detects the flow rate within 2 seconds after the sprinkler head 123 is activated.

[0032] Example 2 FIG. 4 shows the secondary piping 111 according to Example 2, with a volume of 2.8 m 3 4 is a graph showing the relationship between the time from activation of the closed sprinkler head 123 and the flow rate of air flowing through the secondary piping 111 when the volume of the chamber 101 is changed. As shown in FIG. 4, it was confirmed that the flow rate changes depending on the volume of the chamber 101.

[0033] Example 3 FIG. 5 shows a flow chart of the chamber 101 in accordance with Example 3, with the volume of the chamber 101 set to 0.5 dm 3 1 is a graph showing the relationship between the time from activation of the closed sprinkler head 123 and the flow rate of air flowing through the secondary piping 111 when the volume of the secondary piping 111 is changed. When the inner diameter of the pre-activation water flow detection device 109 is 150A, the maximum internal volume of the secondary piping 111 is 2.8 m 3 When the inner diameter of the pre-action type water flow detection device 109 is 100A, the maximum internal volume of the secondary pipe 111 is 0.75m 3 Therefore, the internal volume of the two types of pipes (chamber volume) is 0.5 dm 3 ) was confirmed.

[0034] The embodiments and examples disclosed herein are illustrative in all respects and should not be considered limiting. The scope of the present invention is defined by the claims rather than the above-described embodiments, and it is intended to include any modifications within the scope of the claims and meanings equivalent to the claims. [Explanation of symbols]

[0035] 100 sprinkler equipment, 101 chamber, 102 detector, 103 chamber valve, 104 inflow monitoring switch, 105 vacuum monitoring switch, 106 sprinkler control panel, 107 primary piping, 108 primary control valve, 109 pre-action flow detection device, 110 secondary control valve, 111 secondary piping, 113 branch pipe, 114 vent valve, 115 compound gauge or pressure gauge, 116 terminal test valve, 121, 122, 123 sprinkler head, 131 fire detector, 132 automatic fire receiver, 133 sprinkler central monitoring panel, 134 vacuum pump unit control panel, 141 fixing jig, 200 flame.

Claims

1. Piping in which a vacuum or compressible fluid exists at a pressure different from that of the outside air; a closed sprinkler head provided on the piping; a chamber provided in the piping; a detector disposed between the piping and the chamber for detecting a flow of compressible fluid.

2. 10. The sprinkler system of claim 1, further comprising a valve disposed between the piping and a detector.

3. 3. The sprinkler system according to claim 1, further comprising a fire detector, wherein water is sent to the piping when the fire detector detects a fire and the detector detects a flow of compressible fluid.

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