Steel structure civil defense door suitable for underground protection engineering
A technology of steel structure and civil air defense doors, which is applied in the field of civil air defense doors, can solve the problems of shortened service life of equipment, easy crushing of hinges, laborious rotation, etc., and achieve the effect of reducing friction
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[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0021] see figure 1 , a steel structure civil air defense door suitable for underground protection projects, including a protective door 1, a wall 2, a switch mechanism 3 and a friction reducing mechanism 4, the protective door 1 is movably installed on the wall 2, and the left side of the protective door 1 is fixedly installed There is a rotating core 5, a hand wheel 6 is installed on the front of the protective door 1, the switch mechanism 3 is fixedly insta...
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