A large airtight door

Abstract

A large sealing door comprises a door body, a movable cover board assembly, a door frame, a hollow sealing ring, an air compressor, idler wheels, idler wheel shafts, a guide rail, a worm wheel, a worm, a transmission shaft and a motor, wherein the worm wheel and the worm are assembled to be a worm wheel and worm assembly; the air compressor is connected with the hollow sealing ring through a connection pipe; the movable cover board assembly is connected with the door body through connection pieces and bolts; the idler wheels are arranged on the worm wheel and worm assembly through the idler wheel shafts; the motor is in transmission connection with the worm wheel and worm assembly through the transmission shaft; the guide rail is fixedly installed at the position, in front of a compressed container, of a concrete structural foundation and is in sliding connection with the idler wheels. The large sealing door is simple in structure, and only through one transmission mechanism, the door not only can be opened or closed, but also can be locked or unlocked. As the sealing ring is depressurized and then contracts automatically to be completely disengage from the door body sealing face, no relative friction exists between the door and the sealing ring, and the service life of the sealing ring is long and can reach two years or above.

Description

technical field [0001] The invention relates to the technical field of airtight doors used on pressure vessels, in particular to a large airtight door. Background technique [0002] For large pressure laboratories, in order to facilitate the entry and exit of large and heavy test equipment, and to ensure that the pressure in the laboratory remains constant, a door is required outside the large pressure laboratory. The function of the large airtight door is to isolate the air pressure and temperature in the large pressure laboratory from the outside of the laboratory, and at the same time prevent the outside air from entering the laboratory or the gas or temperature in the laboratory from leaking out. [0003] The large airtight door is used in a large pressure laboratory. When the large or heavy test equipment enters the laboratory, the large airtight door is closed, and the hollow sealing ring in the door frame is inflated and expanded to press the sealing surface of the do...

AI Technical Summary

Problems solved by technology

At present, there are two large laboratories in China, Wugao Institute and Xigao Institute. The large airtight door on the laboratory of Xigao Institute cannot realize the sealing function at all, and no pressure difference test has been done for a long time. The door locking and sealing structure is relatively complicated, the whole door body is heavy, and its sealing effect is not very good

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