The design of automatic warning system of a typical fire

Automatic fire alarm system is used for the early detection and early fire alarm, so as to take corresponding measures (such as the evacuation of personnel, call the fire brigade, start the fire extinguishing system, fire doors, fire shutter operation, smoke, exhaust fan etc.) system. Generally used for regional alarm system, fire alarm system, alarm system control center.

Zone alarm system is relatively simple, but the use of a wide range of. It is by the general alarm controller or regional alarm controller and fire detector, manual alarm button, the alarm device, the fire alarm system.

Alarm control system shall be equipped with an alarm controller (or general alarm controller) and more than two regional alarm controller (or floor display, sound and light alarm). According to the management, centralized alarm controller in the fire control room, regional alarm controller in each area, in order to and management. Centralized alarm system and fire linkage control device of the control center alarm system, which is mainly used for large-scale comprehensive building engineering.

In the design of regional warning system, according to the specification requirement shall conform to the following points:

In a regional system, should choose a general alarm controller, up to more than two taiwan;

Regional alarm controller should be located in a duty room;

The system is relatively small, can only be set linkage simple functional control equipment;

When the regional alarm controller installed in the wall, and the bottom margin of the ground or floor height is 1.3~1.5 meters, close to the door spindle side distance of not less than 0.5 meters, the positive operation distance of not less than 1.2 metres;

Each part of the alarm system:

1) the fire detector is an important component of automatic fire alarm system, is a system of sensory organs, whose role is to monitor the protected areas have no fire. If the fire is found, the characteristics of physical quantities such as temperature, fire, smoke, gas and radiation light into electrical signals, and immediate action, to the fire alarm controller sends an alarm signal. Fire detection and fire detector based on different parameters, can be divided into the smoke, temperature, light, gas and composite. According to the structure can be divided into two major categories of point and line. The main technical performance of fire detector requirements: reliability, voltage and tolerance, response threshold and sensitivity, monitor current, the maximum allowed current alarm, alarm current, the scope of protection, working conditions etc.. Each room detection point type fire detector within the at least one detector. Protection area and protection radius detector shall be in accordance with GB50116-98 "Specification for design of automatic fire alarm" system implementation.

2) manual fire alarm button in each fire zone shall have at least one. From any part of a fire alarm button walking distance should not be greater than 30 meters to a fire in the neighborhood. Manual fire alarm button should be set up in the public place of entrance, button should be set up in the obvious and facilitate the operation of the site, installed in the wall of the bottom height should be 1.3~1.5 meters, and should be clearly marked.

3) the fire alarm controller is an important part of automatic fire alarm system, fire alarm controller is charged with providing the stable working power supply for fire alarm; monitor detector and its working state; the alarm signal receiving, processing, conversion of fire detector output; alarm; the specific location and time of implementation of the corresponding alarm indication; auxiliary control tasks at the same time.