a security door

Abstract

The invention relates to a civil air defense door. The civil air defense door comprises an inner door leaf and an outer door leaf. The inner door leaf and the outer door leaf are connected with each other through a slide connection mechanism, and a buffer layer is arranged between the inner door leaf and the outer door leaf. One side of the outer door leaf is of an arc-shaped structure, a plurality of metal fasteners and an up-down penetrating steel structure cylinder are arranged in the outer door leaf, compartments are filled with fireproof materials, and a plurality of ring-shaped grooves are formed in the peripheral surface of the cylinder at equal intervals. The metal fasteners are arranged on the ring-shaped grooves in a sleeving mode, each metal fastener comprises a fixing part and a mounting part, and each mounting part is formed by mutual welding of a plurality of rings. A first pre-buried piece is arranged on one side of the inner door leaf, a steel column is clamped through a clamping piece, a plurality of threaded holes are evenly formed in the steel column, and a steel plate is fixed to the steel column through screws to form a reinforcing plate. According to the civil air defense door, the weight of the door leaves is reduced, at the same time, the functions of fireproofing, explosion proofing and radiation proofing are achieved, the protection property is good and the door is not prone to being deformed and damaged, the reinforcing plate can be temporarily and additively mounted on the eve of a war, the mounting process is simple, the door can be mounted and used immediately, and the protection property is further improved.

Description

technical field [0001] The invention relates to an underground engineering protective equipment, in particular to an air defense door. Background technique [0002] The civil air defense door is the door of the entrance and exit of the civil defense protection project, and has the function of protection in wartime. Most of the current civil air defense doors are protective doors with a layer of hard steel plates. They have a simple structure and are mostly used to prevent high-strength impacts. The sealing structure is complex, but the sealing strength is low, the fire resistance and heat insulation are poor, and the door leaves are mostly square. The flat surface receives the maximum impact force when impacted. [0003] Therefore be necessary to design a kind of air defense door, to overcome the problems referred to above. Contents of the invention [0004] The purpose of the present invention is to overcome the defects of the prior art and provide a civil air defense d...

AI Technical Summary

Problems solved by technology

Most of the current civil air defense doors are protective doors with a layer of hard steel plates. They have a simple structure and are mostly used to prevent high-strength impacts. The sealing structure is complex, but the sealing strength is low, the fire resistance and heat insulation are poor, and the door leaves are mostly square. Plane, the impact force received by the impact is the maximum

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