Talking about the function, classification and structure requirements of fire doors in fire equipmen

The role, classification and structural requirements of fire doors in fire-fighting equipment. In addition to the functions of ordinary doors, fire doors also have special functions of fire prevention and smoke isolation. If there is a need to pass between the fire compartments of the building, a Class A fire door (fire resistance rating 1.2h) should be provided. Once a fire occurs in a building, it can prevent or delay the spread of the fire to a certain extent.

　　 The fire doors in fire-fighting equipment must have reasonable material selection, good structure, and reliable fire resistance. The determination of its fire resistance must pass the test method specified by the national standard, that is, the "Fire Test Method for Doors and Shutters" (GB7633-87) for fire resistance testing.

　　 In addition to reaching a certain fire resistance limit, the fire doors of civil buildings should also have the characteristics of light weight, beauty and durability.

Fire doors are classified into Class A fire doors, Class B fire doors, and Class C fire doors according to their fire resistance limits. According to the materials they use, they are divided into wooden fire doors, steel fire doors and composite fire doors; according to their opening methods, they are divided into Side-opening fire doors and sliding fire doors; according to the structure of the door leaf, it is divided into glass-inlaid fire-resistant doors and non-glass-inlaid fire-resistant doors, fire-resistant doors with bright windows and without bright windows.

　　The fire door is composed of door frame, door leaf, control equipment and accessories. Its structure and quality have a direct impact on its fire prevention and smoke insulation performance. Determining the fire resistance limit of the fire door is mainly to check the stability of the door, whether the integrity of the door is damaged and whether it loses the function of fire insulation. This is mainly related to the material, structure, fire resistance of the door leaf (no collapse, no penetration cracks or holes in a certain period of time), the gap between the door leaf and the door frame, the heat conduction performance of the door leaf, and the selected hinges and other accessories. related.

　　The minimum fire resistance rating of fire doors at all levels are: 1.20h for Class A fire doors, 0.90h for Class B fire doors, and 0.60h for Class C fire doors. Generally Class A fire doors are used on firewalls; Class B fire doors are used for evacuation stairwells; Class C fire doors are used for inspection doors such as pipeline wells.