Double-leaf steel structure arch pulling plate protective air-tight door and air-tight method thereof

Abstract

The invention relates to the technical field of civil air defense engineering, and discloses a double-leaf steel structure arch pulling plate protective airtight door. The door comprises a door frameand left and right double arched door leaves, the door frame comprises a fixedly-arranged door-shaped frame and a detachably-arranged movable threshold, and each arched door leaf is provided with a set of locking system. The fixed ends of the arched door leaves are rotatably connected with the two sides of the door frame through hinge assemblies, each hinge assembly comprises hinge bases used forbeing connected with the door frame, a concentric pipe, hinge shafts and connecting bases, the concentric pipes and the hinge shafts are longitudinally connected with the adjacent hinge bases, and theconnecting bases are used for being connected with the arched door leaves. The hinge shafts are coaxially connected with the concentric pipes and vertically arranged in the axial direction, one end of each hinge shaft is rotationally connected with the corresponding hinge bases, and the other ends of the hinge shafts are inserted into the concentric pipes and fixed. The two ends of each concentric pipe are inserted and fixedly connected with the corresponding hinge shafts on the two sides. The hinge shafts at the bottoms are rotationally connected with bearing bases, and ball mechanisms and thrust bearings are arranged below the bearing bases. The door is good in air-tight performance and has higher resistance, and construction and use are convenient.

Description

technical field [0001] The invention relates to the technical field of civil air defense engineering, in particular to a protective airtight door with a double-leaf steel structure arched plate and an airtight method thereof. Background technique [0002] According to the relevant provisions of my country's "Civil Air Defense Law", the construction of subway projects must take into account the needs of civil air defense during wartime. The civil air defense system in the urban subway is an extremely important part of the urban civil air defense. The construction of the underground railway should take into account the needs of the civil air defense, and achieve the combination of peacetime and wartime and comprehensive utilization. [0003] With the gradual development of the subway civil air defense system, the underground space protection system has an increasingly strong demand for high-resistance civil air defense equipment, especially some strategically important station...

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved is: the protective airtight door of the existing conventional profile is low in resistance, the protective door of the arched profile is poor in airtightness, and the construction is difficult

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