Lightweight air defense door

Abstract

The invention provides a light civil defense door which comprises a door frame, a door sash, a sealing piece, a single-handle linkage closing lock and a hinge. The door sash is light. The door sash is hinged to the door frame through the hinge. The single-handle linkage closing lock arranged on the door sash comprises an outer handle arranged on the outer side of the door sash through a first horizontal rotating mechanism in the mode of rotating around a horizontal shaft. The single-handle linkage closing lock comprises the outer handle, an inner handle, a plurality of lock heads and a plurality of connecting rods. The outer handle and the inner handle are arranged on the inner side of the door sash through the first horizontal rotating mechanism in the mode of rotating around the horizontal shaft. The lock heads are sequentially arranged on the inner side of the door sash in the circumferential direction of the door sash and each rotate around the horizontal shaft. The connecting rods are sequentially connected end to end to form a square with an opening in one side. The connecting rods in the square shape are overall movably arranged on the inner side of the door sash, one of the connecting rods is rotationally connected with the inner handle, and the connecting rods are correspondingly and rotationally connected with the lock heads. The light civil defense door is easy to operate, time and labor are saved, a sealing rubber strip is compressed evenly, and sealing is reliable.

Description

technical field [0001] The invention belongs to the field of building materials, in particular to a lightweight civil air defense door suitable for underground protection projects. Background technique [0002] Underground protective engineering, also called civil air defense fortifications, refers to underground protective buildings built separately to protect personnel and material shelter, civil air defense command, and medical rescue in wartime, as well as basements that can be used for air defense in wartime when combined with ground buildings. The doors at the entrances and exits of underground protection projects are called civil air defense doors. Among the many types of civil air defense doors, light civil air defense doors are widely used because of the light material of the door leaf. Door. [0003] In the prior art, two handles are arranged on the inner side of the door leaf of the manual door, and each handle is rotatably connected with a vertical connecting ro...

AI Technical Summary

Problems solved by technology

When opening or closing the door leaf, it is realized by operating two handles in sequence, and the weight of the civil air defense door can reach 1 ton. Operating the two handles in turn leads to manual operation difficulties, and it is easy to cause loosening of the contact parts of the door leaf and the door frame, which is very dangerous for the air defense door. The airtightness has adverse effects

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