Structure of machine room and analysis of fire prevention
1, the space structure in the machine room is divided into three layers: under the floor, under the smallpox, and between the flooring and smallpox.
2, the fire factors of the general engine room are mainly caused by electrical overload or short circuit. The main areas of combustion are generally under the floor or under smallpox, and smoke is emitted at the beginning of combustion, and the temperature rises relatively slowly.
Two. Design of fire alarm system
Design of fire detector position
1, under the floor and ceiling, two smoke detectors with different sensitivity are installed. Two detectors with different sensitivity are set in the detection area of a smoke detector.
2, there are 1 smoke detectors and 1 temperature sensing detectors under the floor; 1 smoke detectors are installed on the ceiling and 1 temperature sensors are installed on the ceiling.
Three. Fire fighting linkage system design
1, in the room a road alarm, two alarm and gas discharge in three stages when the action signal should be reflected in the building fire control room, so that the building of unified management.
In 2, the original building and the alarm device is not compatible with the situation, realize the transmission of the three states, there are two kinds of schemes can be realized, one is through building the weak well pipeline to the building fire control room, and the corresponding state display installed in the control room, this method can be used to achieve a variety of action points in the computer room the state, but in the case of building fire room, building weak wells can not place more pipeline space;
The other is a room alarm fire controller through passive contact control module to send the signal to the state, to the building near the original input module and alarm system (another increase), only the input module of the original building alarm system added re programming can be realized, this method can save the new pipes.
3, non fire power and connection linkage system and building alarm, air conditioning system and non fire power supply should be closed in the gas discharge action before 30S, which is a signal alarm controller closes the air conditioner, fire extinguishing valve area and non fire power supply after receiving two alarm signal.
Four. Fire extinguishing system design
1. According to the particularity of the machine room, the system adopts the gas fire extinguishing system, and designs other auxiliary electrical equipment necessary for the system according to the requirements of the gas fire extinguishing.
2, set up a gas emergency start stop button, installed on the exterior wall of the fire extinguishing area.
3, set up two acousto-optic alarm setting gas discharge lamp, installed in the fire area inside and outside the a.
4, set up a gas discharge lamp, gas discharge lamp is the fire controller return signal to control the switch to the pressure on the gas pipeline after the. Other alarm system equipment such as manual alarm button, fire alarm bell and so on, should be set according to the fire regulations.
Five. Gas fire extinguishing system
1, choose the gas type fire extinguishing system. According to the area of the machine room, set up the size and location of the cylinder. The 2.5Mpa. of the system can ensure that most of the gas in the cylinder can be sprinkled evenly to the extinguishing area.
2, the area between the cylinders can be smaller. In addition to consider in the design of the bearing problem between the cylinder, bearing the general building in 600kg/m2, a large capacity of up to 1000kg/m2, in the selection of fire extinguishing cylinders, need floor loading in more than 1000kg/m2, so in the design of fire extinguishing system, need special steel bottle marked with the weight and the area, so that the structure designers in the design of structure, whether need to take measures to reinforce the cylinder, in order to ensure the safety of the building.
Protection requirements for gas fire extinguishing area
1. Through the air conditioning piping in the fire extinguishing area, the electric fireproof valves are installed on both sides.
2, for the underground air conditioning system without pipeline, the installation of electric fire damper is usually installed under the fire wall, and the fire damper is usually opened to ensure the air supply volume of the computer room, and when the fire is extinguishing, it is completely closed to ensure that the pesticides in the fire area do not leak outside.
3. The door installed in the area of the fire extinguishing system must be opened all outside and the closed door is installed.
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