| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide sprinkler fire extinguishing system suppressing water hammer, even when a so-called Torii-shaped pipe (right-angled loop) is laid, merging fire extinguishing water at an opened sprinkler head, the fire extinguishing water divided into two and running in a loop-shaped water main, and discharging it at a prescribed flow rate without causing water flow failure. <P>SOLUTION: The sprinkler fire extinguishing system includes: a water pressure-conveying device 21; a pre-action valve 22; a primary-side pipe 11 which is provided on the primary side of the pre-action valve 22 and to which the water pressure-conveying device 21 is connected on a base end side; and a secondary-side pipe 12 provided on the secondary side of the pre-action valve 22, to which a sprinkler head 2 is connected, and which is regularly filled with negative pressure air. The secondary-side pipe 12 in a protected zone 1 includes a discharge pipe 16 and a motor operated valve 36 acting as an exhaust means and a water-hammer suppressing means, on the water main 12a of the sprinkler fire extinguishing system that includes the loop-shaped water main 12a, and branch pipes 13b connected to the water main 12a and having sprinkler heads 2. <P>COPYRIGHT: (C)2013,JPO&INPIT</p> |
