| Confined by the economical and technical condition,fire hydrant system is the main way of water supply for fire protection in our country;with the continually fast development of the economy,sprinkler system has been used widely in engineering for its several advantages:the high rate of fire extinguishing,less investment,simple managing,especially being able to put out the fire at the early time when it is faint or unstable. We should build a fire protection system which is mainly of the sprinkler system,for the global national power has become stronger.This dissertation focuses on several main aspects of sprinkler system and delivers some opinions.1) Sprinkler system is historical and beneficial,being divided into close-type sprinkler system and open-type system.Of all the types of close-type sprinkler system,recycling preaction system has gained all the advantages and is the direction of development of close-type system.Of the open-type system,water mist can be partly substitute of gas fire extinguishant to put out especial fire in high technical and important industrial zone,it also does no harm to the Ozone Layer,having widely-used prospect.2) Sprinkler is the core component of sprinkler system,the development of sprinkler is the base of the development of sprinkler system.3) The traditional ways of water supply for fire protection has several disadvantages such as more equipments,complex controlling, disadvantageous management,and it can not avoid extra pressure which causes dangers.This dissertation brings forward constant high-pressure and constant-pressure systems,of which sprinkler's working pressure has nothing to do with the pumps and only lightly affected by the level of the water in the cistern,thus ensuring the Constance and equalty of the flow and the sprinkler's working pressure.4) There are fire accidents in middling and small entertainment buildings from time to time in which fire protection establishments are not enough. And it is hard to add traditional sprinkler system to such buildings for economical reasons. According to the current situation,a simplified sprinkler system should be added to such buildings.5) 《Code of design for sprinkler systems》 (GB50084-2001) has changedmuch comparative to the former code,it supposes to calculate by the method of characteristic-coefficient.But nowadays the engineering period has become shorter and shorter.Had done hydraulic calculation by the method of working-area in the preliminary stage ,there would be much time and energy to save.This dissertation has concluded linear relationship between the method of characteristic-coefficient and working-area by calculating for some typical samples of the mid-dangerous rank I . |
