Spring locking device and cabin door comprising same

Abstract

The invention provides a spring locking device which comprises an upper clamping base and a lower clamping base, wherein the upper clamping base is fixed on the edge of a movable plate, a spherical groove is formed in one side, which is away from the movable plate, of the upper clamping base, the lower clamping base is of a cylindrical structure without a top end, and is fixed on a fixed plate by corresponding to the upper clamping base, and a clamping spring and a clamping ball the radius of which is equal to that of the spherical groove are arranged in an inner hole of the lower clamping base. In addition, the invention also provides a cabin door comprising the spring locking device. A sealing groove protruding out of the outer surface of a door sheet is formed in the periphery of the door sheet of the cabin door, and is concave, a seal is arranged at the bottom of the sealing groove, and a sealing ring corresponding to the sealing groove is arranged on a cabin body. The spring locking device is simple in structure, light in weight, and convenient to open or close; and a through hole-shaft structure is not used in the cabin door, and thus leakage channels and leakage area are reduced.

Description

technical field [0001] The invention relates to a spring locking device and the application of the spring locking device in a human cabin door. Background technique [0002] The man cabin (also called the man gate or the air pressure transition cabin) is an important safety equipment of the shield machine, and it is mainly used for the needs of the staff to bring the press into the cabin during the shield tunneling. As a manned pressure vessel, the airtightness requirements of the cabin are relatively high. If the cabin leaks during the intake pressurization or air pressurization period, it will endanger the safety of the people in the cabin. The sub-surface pressure balance is damaged, leading to serious accidents such as landslides and water seepage, which not only endanger the lives of people entering the cabin, but also cause ground subsidence or even collapse in severe cases. The door seal is one of the structures with the largest sealing area in the barometric transit...

AI Technical Summary

Problems solved by technology

These two locking mechanisms can provide a good initial pressing force of the hatch and achieve initial sealing, but the handwheel clamping mechanism is too complicated and heavy, and the operation is also very cumbersome, especially the screw shaft that runs through the hatch increases the One leakage channel and sealing area; the handle clamping mechanism is simpler but also has a pin shaft through the hatch, which also increases a leakage channel and sealing area

Due to the frequent use of handwheels or handles on man hatches, there is still a risk of leakage due to seal wear, aging, damage, etc. even if shaft seals are installed

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