Discharge Ability of Hydrant to Ordinary Fire Yoshiro Namba *1,Kenjiro Yasuno *2,Yoshiteru Murosaki *3,Akihiko Hokugo *4, Masahiro Fujiwara *5, Akihiro Kasuya *6,Hideo Matsuoka* 7 * 1 Department of Architecture, School of Engineering, Kinki University * 1 Takayaumenobe, Higashihiroshima city, Hiroshima, 739-2116, Japan * 2 21st-century Rural Town Water Supply Research Society Waterworks Bureau, Hofu city, 13-1 Niirei-machi, Hofu city, Yamaguchi, 747-0841, Japan * 3 National Research Institute of Fire and Disaster 14-1, Nakahara 3 chome, Mitaka, Tokyo,181-8633, Japan * 4 Research Center for Urban Safety and Security, Kobe University 1-1 Rokkodai-cho, Nada-ku, Kobe, 657-8501, Japan * 5 Japan Water Research Center 2-2-1 Toranomon, Minato-ku, Tokyo, 105-0001, Japan * 6 Japan Water Agency 11-2 Shintoshin, Chuo-ku, Saitama City, Saitama, 330-6008, Japan * 7 Nippon Jogesuido Sekkei Co., Ltd. 1-9-15 Kaigan, Minato-ku, Tokyo, 105-0022, Japan Abstract When more than one hydrant against to the ordinary fire are used at the same time, the result that the water pipe network of Kobe City was experimented is analyzed with a purpose of evaluating the function and ability of the hydrant in this paper. The kobe Fire Department researched the combined pressure investigation of the fire fighting pump cars on June 9, 1986 in order to evaluate the function of the hydrant against to the ordinary fire. We analyzed relations between the amount of drainage and water pressure from the drainage experiment on the water pipe network of the actual town district under the condition of the caliber size of the water pipe and the number of drainage hydrants.
φ φ φ Fig. 1 Fig. 2 Fig. 3 φ Fig. 2 Part of water pipe network diagram at Seiwadaidanchi town (φ : Water pipe diameter [mm], L : Section length [m]. The hexagon shows the fireplug used with from case 1 to case 3. The diamond shows the fire-plug used with from case 4 to case 8. The oval shows other fire-plug. ) Fig. 3 Area of Nishi-Suzuranndai Reservoir Fig. 1 Water pipe network diagram at Seiwadaidanchi town in Kobe City φ
φ Table 1 Table 1 Survey result of pressure among hydrants
φ Fig. 4~Fig. 6 φφ φ Fig. 4 The max quantity of water flow in the condition of residual water pressure 0 (aperture 100 mm) Fig. 5 The max quantity of water flow in the condition of residual water pressure 0 (aperture 150 mm) Fig. 6 The max quantity of water flow in the condition of residual water pressure 0 (aperture 100 mm, 150 mm) (In the case that attach direct a pipe to the hydrant) φ Table 2 Table 1 φ Fig. 4 φ Fig.
Table 2 Relation between necessary residual pressure and pipe of aperture 5 φ Fig. 6 φ φ φ φ φ φ φ Table 3 Table 3 Decrease of the water pressure P Table 1 φ φ Fig. 7, Fig. 8 φ Fig. 9, Fig. 10
Fig. 7 Relation between 100M1 and fire engine number (φ 100 ; case 1-case 3) Fig. 10 Relation between 150M2 and fire engine number (φ 150 ; case 4-case 6) φ Fig. 11, Fig. 12 Fig. 9 Fig. 10 Table 4 Fig. 8 Relation between 100M2 and fire engine number (φ 100 ; case 1-case 3) Fig. 9 Relation between 150M1 and fire engine number (φ 150 ; case 4-case 6) Fig. 11 Relation between *150M1 and fire engine number (φ*150 ; case 7-case 8) (assumption value ; Pw=2, *150M1= 1.1)
Fig. 12 Relation between *150M2 and fire engine number Pw (φ*150 ; case 7-case 8) (assumption value ; Pw= 2, *150M2=1.85) M1, M2 of eq.(1) and fire engine number Pwfrom eq.(5.1)~eq.(5.6) Table 4 Relation between 100M1 and fire engine number (φ 100 ; case 1-case 3) Fig. 13 Relation between the decrease water pressure and the quantity of water flow Table 1 φ φ φ φ Table 3 Fig. 13 Table 1 φ φ φ φ φ φ φ φ Table 1 Table 3
φ φ φ φ φ Table 1 Table 3 φ φ φ φ Table 1 Table 3 Table 5Fig. 14~Fig. 16 Table 5 Combined pressure of hydrant in Kobe City Fig. 14 Relation between residual water pressure and quantity of water flow (case 10 ; φ 100 ; 4 vehicle)
Fig. 15 Relation between residual water pressure and quantity of water flow (case 11 ; φ 150 ; 4 vehicle) Fig. 16 Relation between residual water pressure and quantity of water flow (case 12 ; φ*150 direct attaching to fire engine number : 4 vehicle)
Table 1 φ Fig. 13