A kind of tunnel main line protection closed door for civil air defense engineering

Abstract

The invention discloses a tunnel front line protection airtight door for civil air defense engineering. By arranging arc tracks and rollers, the protection airtight door has additional fulcrum and guidance during the opening and closing process, the opening and closing process is more stable, and many more are arranged on the circular track. A ash block and a scraper are set on one side of the roller to protect and clean the arc track. During the process of ensuring the stable opening and closing of the protective airtight door, the sundries in the arc track are also cleaned at the same time to avoid jamming. , By setting the screw, the moving slider and the compression spring, in the process of opening and closing the protective airtight door, the second bevel gear meshes with the first bevel gear to drive the screw to rotate, so that the moving slider moves, and finally Contact with the first limit block and squeeze the compression spring to slow down the rotation speed of the door body, avoid the phenomenon that the door panel directly hits the door frame or wall, stabilize the overall structure and prolong the service life of the protective airtight door.

Description

technical field [0001] The invention relates to a protective airtight door, in particular to a main line protective airtight door of a tunnel for civil air defense engineering. Background technique [0002] The protective airtight door is set on the outermost side of the entrance and exit. It has two functions of blocking shock waves and isolating poisons. It is an extremely important part of the entire civil air defense project. It does not affect the protection functions of other protection units. Wartime protective airtight doors are mainly used to prevent the shock wave generated by the explosion of nuclear weapons, conventional weapons and various chemical poisons, so as to avoid casualties or equipment damage caused by the damaged protective unit entering the interior of another protective unit. [0003] Due to the large mass of the existing protective airtight door and the lack of support and guidance during the opening and closing process, it is easy to cause excess...

AI Technical Summary

Problems solved by technology

[0006] (1) How to make the protective airtight door have an extra fulcrum and guide during the opening and closing process by setting the arc track and the roller, and the opening and closing process is more stable. Set multiple ash blocks on the circular track and set a scraper on the side of the roller Protect and clean the arc track, solve the problem of lack of additional fulcrum structure instability in the protective airtight door in the prior art, and the problem that the arc track is not easy to clean

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