Objective 1
Determine the maximum possible length of the main line LM, if the second barrel (dN2 = 22 mm) is necessary to obtain a stream of performance g2 = 3,4 l / s.
Sleeve system consists of a main line diameter dM = 77 mm, and three business lines lengths l1 = 40 m, l2 = 20 m, l3 = 40 m; diameter d1 = 51 mm, d2 = 51 mm, d3 = 66 mm and stems with diameters of nozzles dN1 = 13 mm dN2 = 22 mm, = 16 mm dN3. Stems are raised relative to the height of the branching Z1 = 2 m, Z2 = 2 m, Z3 = 0 m, and branching set relative to the axis of fire engine pump PDA-40 (130) at a height Zrazv m = 0.
Sleeves of rubber.
Task 2
Determine the number AHP-pump - 40 (130) needed for water supply to the pumping, if the difference in elevation between the head-pump and water source Z = 6 m. Pumping is done at a distance L = 1200 m on two lines with a bag rubberized d1 = 51 mm and d2 = 66 mm. The head-pump, located at the site of the fire, provides the two trunks with diameters of nozzles dN1 = 19 mm and 16 mm = dN2. The pump operates in α = 0,75. Sleeves of rubber.
Objective 3
To fire monitors from the nozzle dN1 = 28 mm water supply from two fire trucks APR-40 (130) and AA-40 (131). From car PDA-40 (130) is extended hose line diameter d1 = 66 mm rubberized sleeves length L1 = 110 mm, and from the vehicle AA-40 (131) - from rubberized sleeves diameter d2 = 66 mm and a length L2 = 130 mm . The trunk is raised to a height of Z = 6 m. Determine the pitch of each of the fire pumps.