An emergency fire door

Abstract

The invention provides an emergency fire door. The emergency fire door includes fire door normally open devices and an assistant device, wherein the fire door normally open devices are used for limiting closing of a fire door body during opening of the fire door body, the assistant device is used for assisting the fire door normally open devices during triggering operation, the arranged two sets fire door normally open devices correspond to two door panels of the fire door body respectively, the fire door normally open devices include limit normally open mechanisms and reset closing mechanisms, the limit normally open mechanisms are used for limiting the closing of the fire door body during the opening of the fire door body, and the reset closing mechanisms are used for making the limit normally open mechanisms to remove the limiting on the fire door body. The emergency fire door enables to limit the closing of the fire door after people push and open the fire door, even if the fire door is always kept open after the fire door is pushed and opened, in case of fire, only a first person needs to open the fire door, subsequent evacuation personnel can quickly pass, and the escape efficiency is higher.

Description

technical field [0001] The invention relates to the field of fire protection, in particular to a device for keeping a fire door normally open after being pushed open. Background technique [0002] The residential core tube is the central part of the building, which is formed by elevator shafts, stairs, ventilation shafts, cable shafts, public toilets, and some equipment rooms. It forms an outer frame and inner tube structure with the peripheral frame. It is poured with reinforced concrete. The fire protection requirements of residential buildings The fire elevator and stairs of the core tube share the front room, which needs to be separated by fire doors. The function of the fire door is to prevent and delay the fire and smoke from spreading to the fire elevator and the front room of the stairs when a fire occurs, giving pedestrians and firefighters time to evacuate Or fire fighting, ordinary fire doors, equipped with door closers, usually closed and useless, just to separat...

AI Technical Summary

Problems solved by technology

[0002] The residential core tube is the central part of the building, which is formed by elevator shafts, stairs, ventilation shafts, cable shafts, public toilets, and some equipment rooms. It forms an outer frame and inner tube structure with the peripheral frame. It is poured with reinforced concrete. The fire protection requirements of residential buildings The fire elevator and stairs of the core tube share the front room, which needs to be separated by fire doors. The function of the fire door is to prevent and delay the fire and smoke from spreading to the fire elevator and the front room of the stairs when a fire occurs, giving pedestrians and firefighters time to evacuate Or fire fighting, ordinary fire doors, equipped with door closers, usually closed and useless, just to separate the front room of the fire elevator and stairs, but when a fire breaks out and people need to escape from the stairway, the people in front push After opening the fire door, once you let go, the door closer will automatically close the fire door, and the people behind need to continue to push, which brings great inconvenience to people's escape. , physical strength and judgment ability decline, and it is possible to miss the best escape time because the fire door cannot be pushed open in time, resulting in an accident. It can restrict the closing of the fire door after people push it open, even if the fire door is always kept open after being pushed open, in the event of a fire, only the first person pushes the fire door open, and the subsequent evacuees can quickly pass through , the escape efficiency is higher

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