【 Weak current College 】 on automatic fire alarm system linkage control design suggestions

Automatic fire alarm system is there for the early detection of fire, and promptly to take effective measures to control and extinguish the fire of an automatic fire-fighting facilities, is indispensable for the modern fire protection technical means. Automatic fire alarm system consists of a trigger, fire alarm system, fire alarm system and other accessibility features of the device. As the senior civil building design fire protection standard, the architectural design fire protection standard, fire technical regulations implementing Executive, throughout many important sectors, fire safety key unit and vital parts are equipped with automatic fire alarm system, and the vast majority have played an important role. The automatic fire alarm system linkage control a number of related issues, for your reference.

First, fire control room to cut off the parts of the non-fire power way

The automatic fire alarm system design specifications "section 6.3.1.8 stipulates:" fire control rooms in confirmation after fire, should be able to cut off the parts of the non-fire power ... "the way to artificial cut off, or you can automatically cut off. But in the current building projects, the use of automatic cut off by the majority, and in the larger context cut non-fire power.

Recommendation: non-fire power cut way to manually, and when the use of automatic cutting manner, you must use double signal control to prevent the single signal cut off power to the non-fire, malfunction, disturb people normal office, production, order, and may even result in undue losses, and cut off the order should consider the floor or the scope of the fire prevention division-by-case basis, when the power is cut off the non-fire should be limited, in order to reduce the power of unnecessary panic.

Second, fire control room on fire shutter of linkage control mode

For the second step of reduction of fire shutter, the automatic fire alarm system design specifications "section 6.3.8 stipulates:" when the smoke detector actions after the shutter down to distance (floor) surface 1.8 m; thermal detectors actions after the shutter down to the end. "Design and construction often will heat detector unit located near the fire shutter, but from the actual circumstances, the defective. Fire shutter in large-area, big space of shopping centres, theatres and cinemas, as fire compartmentation application, due to the large space signal propagation, line effects, laying of fire shutter only rely on both sides of the heat, smoke signals as linkage control signals, safety and reliability of its action cannot be guaranteed.

Recommendation: If the setting automatic sprinkler system, you can set the flow meter or alarm valve signal as fire shutter of linkage signal to increase fire shutter of linkage action of reliability.

3. fire control room on the elevator control mode

The automatic fire alarm system design specifications "section 6.3.1.9 stipulates:" fire control rooms in confirmation after fire, should be able to control all of the stops on the first elevator, and receive their feedback signal. "On the elevator control in two ways: one is the elevator control to display trays located in fire control rooms, fire watch officer may direct manipulation; the other is in the manual to confirm the real fire, the fire control room to the elevator control room issued fire signal and force the elevator of the directive, all elevator stopped on the first floor for the downlink.

Opinion: elevator is vertical channel's main means of transport, linkage control must be safe and reliable. The higher degree of automation in buildings within the available before the fire the elevator room smoke detector linkage control elevator.

IV. fire control room on fire emergency broadcast control mode

Fire, time to fire district fire alarm, orderly evacuation, the organization is to guarantee the personal safety of important aspects. The automatic fire alarm system design specifications "sections 6.3.1.6 stipulates the procedures require" second floor and above the building there is a fire, you should connect the burning layer and its adjacent upper and down ... ".

Recommendations: on the control of the fire emergency broadcasting should be focused on "order" to avoid confusion for stress, affecting the evacuation, first a minimal scope for alarm signals, emergency broadcasting in accordance with the staff after the location away from the scene of an alert in accordance with the order, the organizers of an orderly evacuation. In addition to the emergency circumstances should order the evacuation.

5. fire control room on fire sprinkler system control

Automatic sprinkler system is a way to automatically start, sprinkler, and cannot be given fire signal of fire control system, it is the building on the widest range of applications, the amount of a maximum number of automatic fire extinguishing system. The automatic fire alarm system design specifications "section 6.3.3 stipulates a fire control equipment on the sprinkler system of control and display features mainly has following several: first, the control system start-up and shutdown; second, showing flow indicator, alarm valve, safety valve for operation; the third is to show the fire pump work, a failed State."

Think: to ensure that automatic sprinkler system reliability, should increase the control valve on the fire pump power supply and work situations, fire water tank, water tanks, such as display monitoring of water level, which is conducive to the fires and the usual maintenance and debugging work.

6. fire control rooms to smoke, smoke exhaust system control

Fire, smoke is causing fire casualties. Smoke, smoke exhaust system is to exclude a large number of fires, smoke and gas to ensure that the building personnel took refuge with the smooth, safe, and to create favourable conditions for fire and rescue. The automatic fire alarm system design specifications "section 6.3.9 stipulates a fire control equipment on smoke, smoke extraction facilities should have control, displays, features are: one is to stop the relevant parts of the air conditioning, closed electric fire dampers, third is to receive feedback signal.

Opinion: given the exhaust fan, positive-pressure blowers are set on the roof or keep away from fire control room location, usually the State should be automatic. Conditions allow, the exhaust valve should be set and smoke detector interlockAutomatic opening device, in addition to the fire when it opens, usually remain blocked State. At the same time exhaust valve and exhaust fan interlock, when any of the exhaust valve is opened, the exhaust fan should be able to start, after the confirmed outbreaks of fire, fire control, remote control.