Closed fireproof door closer for corridor firefighting

Abstract

The invention relates to the technical field of fire-fighting equipment, and discloses a closed fireproof door closer for corridor firefighting. The closed fireproof door closer for corridor firefighting comprises a wall body, a fire-fighting door and a temperature sensor, wherein the fire-fighting door is movably connected with the wall body through a rotating shaft, and a fixed box I is fixedly mounted at the top of the left side of the front surface of the fire-fighting door. Through the arrangement of a thrust spring I, a thrust spring II and a limiting rod, in the daily use process, the fire-fighting door is closed through the limiting rod in the inclined posture and under different thrust effects of the thrust spring I and the thrust spring II, and electricity consumption in the long-time use process of most electromagnetic door closers is avoided; meanwhile, in the daily use process, when the fire-fighting door is closed, thrust of the thrust spring I and the thrust spring II abutting against a sliding block I and a sliding block II is gradually reduced due to the fact that gradual release of the thrust spring I and the thrust spring II is finished; and when the thrust reaches the limit, reverse pulling can be conducted, so that the fire-fighting door can be slowly closed, violent collision between the fire-fighting door and the wall body is effectively prevented, and loss is reduced.

Description

technical field [0001] The invention relates to the technical field of fire-fighting equipment, in particular to a closed fire-proof door closer for fire-fighting in corridors. Background technique [0002] At present, in order to enhance the fire protection performance inside the building, fire doors are installed in the building evacuation passages. The main function is to isolate the fire and escape the people when the fire alarm occurs. The fire doors are opened towards the fire exits and have automatic recovery. Function, people can easily run to the fire exit from the residential area or commercial area, and the door will automatically close to prevent the entry of fireworks and win more survival opportunities for the escapees, but there are some deficiencies in the fire door closers currently used. as follows: [0003] Although the fire-proof door closers currently used can automatically restore the door and block the smoke, when a fire occurs, a large amount of high...

AI Technical Summary

Problems solved by technology

[0002]At present, in order to strengthen the fire protection performance inside the building, fire doors are installed in the building evacuation passages. The main function is to isolate the fire and escape the people when the fire alarm occurs. , the fire door is opened towards the fire exit, and has an automatic recovery function, people can easily run to the fire exit from the residential area or commercial area, and the door will automatically close to prevent the entry of smoke and fire, and win more survival for the escapees Opportunities, but there are some deficiencies in the currently used fire door closers, as follows:

[0003]The fire-proof door closers currently used can make the door automatically recover and block the smoke, but when a fire occurs, a large amount of fire will be generated inside the building If the high-temperature gas cannot be evacuated in time, high pressure will be generated inside the building. In this way, if people can push the door open, the high-temperature gas can also push the door open, causing a large amount of smoke to enter the fire exit, causing serious damage to people's escape. It is a great threat, causing people to inhale a large amount of smoke and cause suffocation. The door closers currently used cannot close the door in time, and cannot distinguish between the push of high-temperature gas and the push of people

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