Applications Optimization Of Fine Dry Powder Fire Extinguishing System In The Cable Trench Of Hanging Reservoir Pressure

In order to have more comprehensive focus on urban planning， efficient use ofspace， and be able to take into account aesthetics， cable trench gradually become themain mode of application of municipal pipeline construction. Large cabletrench densityare more prone to fire， due to the special nature of its environment， fire-fighting，rescue is very difficult， and once the cable tunnel fire will have a great impact on thecity’s power system， causing significant economic losses. Therefore，it is important tohelp expand the study of the cable trench cable automatic fire extinguishing system workfor the cable fire.This paper analyzes the main causes of cable tunnel fires. They areshort circuit，overload， leakage， excessive contact resistance and other characteristics of the cablefire and made it clear that the cable fire spread fast， produce large amounts of toxic andhazardous gas fire process， are not conducive to firefighting personnel. For thesereasons， automatic fire extinguishing system in the cable tunnel is necessary. This paperpresent several common automatic fire extinguishing system facilities， comparativeanalysis of their strengths and weaknesses as well as the suitability of the application inthe cable tunnel. Because of the high stability， fire resistance and other performancecharacteristics，the fine dry powder fire extinguishing system has a good prospect and is amore appropriate application of the cable tunnel. Use the integrated trench FDS firesimulation model to build the tunnel. It is higher precision and with less computationaleffort. Through simulation， we can get the changes of gas， temperature， etc.According to the simulation results， you can set the delay or start time of theextinguishing systems， provide the basis of the specific arrangement of theextinguishing.Finally， I made a series of fine dry powder automatic fire extinguishing system testin the specific circumstances of a cable trench in Beijing.Based on the tests results andthe analysis of the FDS modeling， we propose in setting， usage and other aspects，make fire emergency rescue plan of cable trench， and suggest on the fire prevention andfire safety measures of cable trench for fine dry powder automatic fire extinguishingsystem as the cable trench for fire prevention measures and eliminate antirecommendations.