Fire linkage control means that after the fire detector detects a fire signal, it automatically cuts off the related air conditioner, turn off the fire damper online, stop changing the fan, and open the relevant piping the exhaust valve, automatically closes the electric fire door, Fire shutters, cut off non-fire power in turn, turn on emergency lighting and evacuation sign lights, stop removing All elevators except fire elevator, and immediately start fire extinguishing through the control center system controller to realize automatic fire extinguishing.

English name — Fire linkage control system
The main purpose – The role of fire extinguishing
Structure – Fire Phone System
Design Type – Bus Form

The linkage form can generally be divided into two forms: centralized control, decentralized control and centralized control combination. The control modes include linkage (automatic) control, non-linkage (manual) control, linkage and non-linkage.

The centralized control system is a system that centrally controls, displays and manages all the firefighting facilities in the system through the firefighting control room. This system is suitable for bus system, digital control, communication system, especially suitable for adopting computer control of building automation management system; when the number of control points is small and dispersed, multi-wire also commonly used. When the number of control points is very large and scattered, in order to make the control system simple and reduce the number of control signals and the number of control lines, a decentralized and centralized system can be used, usually a fire pump, blower , smoke prevention and exhaust fan,  some fire shutter doors and automatic fire extinguishing control devices, etc., centralized control and unified management in the fire control room; large-scale decentralized control systems such as smoke prevention and exhaust fans, fire-proof door releasers etc. can be controlled by on-site distributed control. It should be emphasized that no matter what kind of control system, the actuator action signal of the controlled object should be sent to the fire control room for centralized display. Controlled objects (such as elevators, non-fire-fighting power sources, etc.) that are prone to confusion and serious consequences in high-rise buildings should be centrally managed by the fire control room.

The indoor fire hydrant system is the most basic fire-fighting equipment in a building. The system consists of fire-fighting water supply equipment and electrical control parts. The fire fighting equipment realizes the following control of the fire hydrant system through the electrical control cabinet: start and stop the fire pump; display the position of the button to start the pump, and display the working and fault status of the fire pump.

Automatic sprinkler system can be divided into closed type and open type according to the water spray form; can the former be divided into various forms? Among them, wet sprinkler systems are the most widely used. Wet sprinkler fire extinguishing and automatic alarm system is an important branch system of building fire monitoring system. In the event of a fire, the heat-sensitive element (glass bulb) of the enclosed sprinkler installed in the area is thermally ruptured, causing damage to the pipe network. The pressurized water is sprayed out through the nozzle to extinguish the fire; at the same time, the water flow indicator installed on the branch pipe of the water distribution network acts to send an opening signal, which is received by the water spray alarm box after a delay of lo. After judging the signal, the alarm box sends out an alarm signal and displays the fire line and location; the alarm box outputs the signal, starts the spray pressurizing pump or the spray water pump, increases the water supply of the pipe network, and provides the water and energy required to quickly extinguish the fire source. Water pressure; fire control room takes corresponding fire extinguishing measures immediately after receiving the alarm signal.

Halogenated fire extinguishing systems are used in buildings that are not suitable for fire extinguishing with water but in important places, such as retrofitting power distribution rooms, computer rooms, archives, etc. Usually, the halogenated alkyl fire extinguishing system is controlled by the fire detection and alarm system to realize automatic fire extinguishing. The commonly used halogenated alkane fire extinguishing agents are 1211 and 1301, which have high fire extinguishing efficiency, fast fire extinguishing speed, no trace after fire extinguishing, and electrical insulation. It is an excellent fire extinguishing agent, but it also has obvious shortcomings: high toxicity and high price; more importantly, it is a destructive agent. One ​​of the main culprits of the atmospheric ozone layer, will face phase-out. Carbon dioxide and other fire extinguishing agents can replace halogenated alkane fire extinguishing agents, and there will be better alternative products to meet the demand in the future.

The usual practice is that the exhaust valve is linked separately, or the equipment needs to design a control module and a monitoring module. After the detector alarms, the control module receives the alarm controller command to open the smoke exhaust valve, and the operation of the smoke exhaust valve is monitored by the feedback signal. module complete

For equipment such as fire shutter doors, it is not only required to be able to control the descent from the upper position to the middle position, but also to be able to control the lower position to drop from the middle position to the lower position, and at the same time determine the position of the upper, middle and lower positions if necessary, a manual control button should be added to achieve linkage or non-linkage control.

In the event of a fire, the fire detector detects the fire throughthe transmission line. It is sent to the fire alarm controller, and after manual confirmation, the corresponding speaker is activated or deactivated through the fire broadcast controller; at the same time, the siren is activated and an audible alarm is issued. The speakers require manual operation at the same time.

The purpose of controlling the non-fire-fighting power supply is to reduce the continuous development of the fire and reduce the casualties caused by electric shock when the fire hydrant is extinguished. Non-fire electricity includes equipment such as general lighting, domestic water pumps, and air conditioners. Power sources not intended for fire protection, especially lighting power sources, should be used with caution during fires and early stages of fire. Reduce disruption caused by power outages. When it is confirmed that a fire has indeed occurred, the power supply of the air conditioning and ventilation systems not related to fire protection should be cut off first, as it may contribute to the fire and will have no effect on people afterwards. Power is cut off. In response to a power failure of the lighting power, first turn on the emergency evacuation lighting, cut off the lighting power supply in the fire area, and then cut off the lighting power supply in the surrounding fire area.

At the same time, according to the fire situation, all other elevators except fire elevator are forced to stop on the ground floor in turn, and their power is cut off.