Research On The Guiding Place Of The Sprinkler System In Fire Protection For Building And The System's Function

As fire protection services for building, the sprinkler systems have been extensively used, lots of engineering practices have also proved that these systems have high efficiency on fire-extinguishing and fire-controlling. But some historical reasons and some original concepts about the fire protection for building caused the guiding place of the systems in fire protection for building not to be established. Moreover, although all relevant codes of design or installation provided a feasible according for design and installation, but these codes have some flaws which decreased the function of fire protection of the sprinkler systems. On the basis of investigation on the related datum and literature at home and abroad, combining engineering practices, according to the principal of safety, economy and reason, this paper put emphasis on the dominant place of sprinkler system in fire protection for building. furthermore, in the light of the related terms of design cords and the doubtful points in practice, the author put forward personal proposals. the main works and conclusions in this paper are as follows:(1)By the irrefutable datum and evidences and with the viewpoint of fire- protection economic, the author illustrated that:a)As a traditional main fire-protection means that combine the systems conclude hydrant system, automatic fire alarm system and building separating system for fire protection, it is not efficient, let alone economic, so it should be abolished in complicated multi-layer building and high building.b)The sprinkler systems should be the main fire-protection means for building, they are more safe , more economic and more reason than the other systems, so it should generalized. (2)In this paper, the author summarized the working principle ,the superiority and the limitations of a few main kinds of classical sprinkler systems; put emphasis on the importance of a few key points which is relevant to the function of the system, such as the choosing of sprinkler and it's fixing, the automatic checking function of water pump, the layout of alarm valve, especially the choosing of sprinkler and it's fixing; looked through the feasibility of which we used water instead of gas by water mist especially finely divided water mist fire-extinguishing technique.(3)According to the hydraulic calculation which is the most complex and mayspend considerable working in the course of design, the author put forward a workable method on the basis of the code of design and a soft named "EXCEL" . Moreover, the author put forward a proposal to the doubtful problems which are the setting of the tank above building and the pressure pump, and that not only could assure the sprinkler systems' function of fire extinguishing and fire controlling, but also could save a lot of working time.