Fire door is a kind of fire partition. In addition to the function of ordinary door, it can meet the fire resistance stability and integrity within a certain period of time, together with the frame, and has the special functions of fire prevention, smoke insulation and high temperature resistance. , Should have self-closing and signal feedback functions.
For the convenience of use, some units keep the normally closed fire doors open for maintenance for a long time (especially the buildings where evacuation passages are frequently used in public venues such as shopping malls); some public entertainment places take into account the decoration effect, in order to pursue overall unity and After the inspection and acceptance by the public security fire department, the door should be dismantled or replaced with ordinary doors; some hospitals set up buffer brackets at the protruding threshold for the convenience of critically ill patients, which makes the maintenance of fire doors lax; when some people are obstructed when carrying large items, Open the fire harder to make the normally closed fire door repair door closer exceed the maximum limit. In the lightest case, the normally closed fire door repair door closer is damaged, causing the fire prevention to fail to return to the normal position, and in the worst case, the fire door repair door frame and door panel are damaged. It loses its due function of preventing smoke and fire, completely loses its due function, and cannot guarantee the need for safe evacuation of personnel at all.
