Steel structure civil defense door suitable for underground protection engineering

Abstract

The invention relates to the technical field of civil air defense doors, and discloses a steel structure civil defense door suitable for underground protection engineering. The steel structure civil defense door comprises a protection door, a wall body, switch mechanisms and antifriction mechanisms, the protection door is movably mounted on the wall body, a rotating core is fixedly mounted on theleft side of the protection door, a hand wheel is movably mounted on the front surface of the protection door, the switch mechanisms are fixedly mounted on the front face of the wall body, the antifriction mechanisms are fixedly mounted on the opposite sides of the two switch mechanisms, and a lapping ring is fixedly mounted on the front face of the wall body. A civil defense door is usually madeto be quite heavy, so that when the civil defense door is opened and closed, due to the weight of the door, the door only has one hinge as a supporting point during rotation, large pressure can be applied to the hinge, large friction force can be generated, rotation is more labor-consuming, according to the steel structure civil defense door, the friction force between the hinge and the civil defense door can be reduced when the civil defense door is opened, and the civil defense door can be opened in a more labor-saving mode.

Description

technical field [0001] The invention relates to the technical field of civil air defense doors, in particular to a steel structure civil air defense door suitable for underground protection projects. Background technique [0002] The civil air defense door is the door of the entrance and exit of the civil protection project. The classification of the civil air defense door is relatively clear. There are ordinary single and double protective airtight doors and airtight doors, and a variety of civil air defense equipment such as single and double protective airtight doors and airtight doors with living thresholds. In order to ensure the protective effect, the quality of civil air defense doors is usually made quite heavy. When opening and closing, due to the weight of the door, the door only has a support point of the hinge when turning, which will put considerable pressure on the hinge, resulting in The relatively large frictional force makes the rotation more strenuous. At t...

AI Technical Summary

Problems solved by technology

In order to ensure the protective effect, the quality of civil air defense doors is usually made quite heavy. When opening and closing, due to the weight of the door, the door only has a support point of the hinge when turning, which will put considerable pressure on the hinge, resulting in The relatively large friction force makes the rotation more strenuous. At the same time, the protective door supported only by hinges will also make the hinges more likely to be crushed, resulting in equipment loss and shortening the service life of the equipment.

[0003] Aiming at the deficiencies of the prior art, the present invention provides a steel structure air defense door suitable for underground protection projects, which has the advantage of saving labor to open the air defense door, and solves the problem of laborious opening of the air defense door

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