Studies On The Sprinkler System And Hydraulic Calculation

In our country, sprinkler systems always adopt ramiform arrangements.because its'security and reliability is low, it's necessary to study on ringed arrangements and hydraulic calculation of the sprinkler systems.Types and mechanisms of the sprinkler systems are summarized at first. And, the applicable conditions and the merits and shortcomings of every kind of subarea forms are compared according to the plane and vertical arrangements of buildings, water supplying pressure of cities, water tanks or pressure stabilization devices installed in buildings, working states of fire pumps and working pressure of the vertical systems and sprinkler numbers. Then hydraulic calculation of the most disadvantageous district in ramiform pipe system is carried out. The influences of different design forms on the choice of piping diameter and fire pumps are also discussed.According to action principle, extinguishing process and efficiency of the sprinkler systems, it is put forward that the ringed arrangements replace the ramiform arrangements. According to the types, height and fireproof grade of the buildings, four basic ringed arrangements are brought up, namely the ringed arrangemensts of branch lines,the ringed arrangements of cross mains, the ringed arrangements of feed mains and the ringed arrangements of fire waterhead.On the basis of analyzing the means, characteristic and applicability of the four basic ringed arrangements,several practicality ringed arrangements are brought up,namely the ringed arrangements of branch lines and cross mains, the ringed arrangements of cross mains and feed mains, the ringed arrangements of branch lines and feed mains, the vertical ringed arrangements of feed mains and the ringed arrangements of sprinkler system in the abnormity buildings.On the basis of the sprinkler systems' ringed arrangements , FEM is used to build Mathematic Model of sprinkler systems.The Mathematic Model applies to both the ringer arrangements and the ramiform arrangements. VB6.0 is used to compile caculation program, and a practical engineering use it to caculate.Extensive use of the ringed arrangements of sprinkler systems will improve the efficiency that sprinkler systems extinguish fire in the initial stages of fire. The ringed arrangements haveprodigious practicability.