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Where is the fireproof rolling shutter door generally set
According to the process flow, if there is no firewall between the two fire compartments, in addition to the firewall, the fire rolling shutter door shall also be set. It is usually located in the following sections.
(1) Enclosed escape stairs to walkways; Close the elevator lobby, doors to the front room and doors to the walkway.
(2) Divide the fire compartment, control the building area of the fire compartment, and set up firewalls and doors on the fire compartment. When it is difficult to set firewall or fire door in the building, the fire rolling shutter door shall be used instead and protected by water curtain.
(3) Codes (such as GB50045-95 code for fire protection design of high rise civil buildings) or partition doors with special requirements for fire and smoke prevention. For example, in the high-rise civil building (gas cylinder, foam station, etc.), there is a fixed fire extinguishing equipment room. High grade fire doors shall be used for doors that are often inhabited or have more combustibles on the partition walls of basement rooms; Due to limited conditions, it is necessary to install oil and gas boilers, oil immersed power transformers, oil filled high-voltage capacitors and switches in high-rise buildings. Class a fire door shall be adopted for partition door of special room. There are also household doors specially designed for fire protection requirements, such as fire monitoring and command, archives and reference room, valuables warehouse, etc. generally, class A or class B fire doors are selected.
Application scope of fireproof rolling shutter door:
It is mainly used in large supermarkets (supermarkets), large shopping malls, large material markets, large exhibition halls, factories, warehouses and other public places with fire protection requirements. In case of fire alarm, the fire rolling shutter door will automatically put down (put down) according to the preset procedure under the control of the intermediate fire protection system to prevent the flame from spreading to other areas and strive for valuable fire extinguishing time.
Under normal circumstances, according to the provisions of the national fire protection law, large buildings are equipped with intermediate fire protection systems. When a fire occurs, the smoke sensor installed on the roof (hereinafter referred to as the smoke sensor) first receives the smoke signal and sends an alarm to the intermediate control system. After identification, the intermediate fire protection system connects the power supply of the fire rolling shutter door in the fire area, so that the fire rolling shutter in the fire area decreases at a certain speed. When the roller shutter drops to about 1.5m above the ground, stop the descent to facilitate personnel evacuation. After the fireproof rolling shutter door stays in the middle for a period of time, continue to close until it is closed. The falling speed and the median residence time of the fire shutter doors can be adjusted during installation.
In some cases, the building is not equipped with an intermediate fire-fighting system, and the fire rolling shutter door only realizes the fire-fighting specified operating procedures of the fire rolling shutter door with the help of the fire-fighting electrical box of the fire rolling shutter door. In this case, when a fire alarm occurs, the fire alarm signal received by the smoke sensor is directly transmitted to the fire electrical box of the fire rolling shutter door.
In case of power failure, the fireproof rolling shutter door can only be put down by pulling an iron chain. The fireproof rolling shutter door is manually operated, which can only be lowered in one direction and cannot be lifted.
The manufacturing requirements are high, that is, the whole system is required to withstand a high temperature test of about 1100 ° for a period of time. The fire resistance time of fireproof rolling shutter door is the main index of fireproof rolling shutter door. Gb14102-93 general technical conditions for steel fireproof rolling shutter doors specifies four fire rating of fire resistance time.
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