Dual-airbag inflatable air tight door and air tightness self-checking method

Abstract

The invention discloses a dual-airbag inflatable air tight door. The dual-airbag inflatable air tight door comprises a door body and a door frame, and the door body and the door frame are rotatably connected; two inflatable airbags separately wrapped on the outer side wall of the door body are arranged between the door body and the door frame, and an interval is formed between the two inflatable airbags and the two inflatable airbags are separately connected with two inflatable tubes; the other ends of the inflatable tubes communicate with an external air source, and magnetic valves are arranged on the two inflatable tubes; and each of the inflatable airbags can be separately in contact with the door body and the door frame in a sealing mode after being inflated to a predetermined pressurevalue. After the air tight door is completely sealed, a relative pressure difference between the air pressure of a cavity between the two inflatable airbags and the external atmospheric pressure canbe detected by a differential pressure sensor, and then an unit time change value of the relative pressure difference is observed to determine whether the two inflatable airbags achieve a sealed state, thereby determining the airtightness of the air tight door. The dual-airbag inflatable air tight door and an air tightness self-checking method have the advantages of simple structure and convenientuse.

Description

technical field [0001] The invention relates to the technical field of safety protection equipment, in particular to a double-airbag inflatable airtight door and an airtight self-inspection method thereof. Background technique [0002] Airtight doors are generally used in rooms with high airtightness requirements in high-level biosafety laboratories, nuclear power industries, ships and other facilities to solve the problem of airtight isolation of access passages between different areas in the enclosure. On the one hand, the airtight door is a part of the airtight room, and its sealing performance largely determines the overall airtightness of the laboratory room. On the other hand, at present, the airtightness of the airtight door after it is installed in the room can only be indirectly evaluated by testing the overall airtightness of the room enclosure structure. If the airtight door leaks during use, it will It will lead to a decrease in the airtightness of the room wher...

AI Technical Summary

Problems solved by technology

On the one hand, the airtight door is a part of the airtight room, and its sealing performance largely determines the overall airtightness of the laboratory room. On the other hand, at present, the airtightness of the airtight door after it is installed in the room can only be indirectly evaluated by testing the overall airtightness of the room enclosure structure. If the airtight door leaks during use, it will As a result, it is especially necessary to monitor the airtightness of the airtight door at all times or on a regular basis.

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