Seal structure of double-half-ball closed type compressive cabin and double-half-ball closed type compressive cabin based on seal structure

Abstract

The invention discloses a seal structure of a double-half-ball closed type compressive cabin, the seal structure of the double-half-ball closed type compressive cabin can conduct synchronous locking on an upper cabin body and a lower cabin body of the compressive cabin at different water depths to prevent seal of the compressive cabin from losing efficacy. The seal structure comprises an upper seal boss arranged on the external edge, at the attaching surface being attached to the lower cabin body, of the upper cabin body of the compressive cabin, a lower seal boss is arranged on the external edge, at the attaching surface being attached to the upper cabin body, of the lower cabin body of the compressive cabin, and at least three seal compressing devices evenly distributed in the circumferential direction are arranged, at the attaching surfaces of two half-balls, on the peripheries of the upper cabin body and the lower cabin body; each seal compressing device comprises a rotary clamping jaw, the other ends of the rotary clamping jaws are detachably connected to the seal boss of the other half-ball of the compressive cabin through connecting pieces, compressing grooves matched with the shape of the attached upper seal boss and lower seal boss are formed in the rotary clamping jaws, and the upper surfaces and the lower surfaces of the rotary clamping jaws are inclined to the center correspondingly; and the seal compressing device further comprises compressing mechanisms arranged on the rotary clamping jaws connected with the connecting pieces in a clamping mode.

Description

technical field [0001] The invention relates to a sealing structure of a double hemisphere closed pressure chamber. Background technique [0002] There are two main types of pressure chamber structures for active deep-sea manned vehicles: [0003] (1) One is a welded pressure chamber. The differences in the manufacturing process of titanium alloy spherical shells in various countries are mainly in the hemispherical forming and welding process. One is a titanium alloy spherical shell made in the United States, Japan and other countries represented by the Alvin. The hemisphere is formed by direct stamping of a large-scale thick plate, and then electron beam welding is used to weld the equatorial seams of the two hemispheres; the other is Represented by the spherical shell of the Jiaolong manned cabin, the hemisphere is formed by welding multiple splits into a hemisphere, and then welding the equatorial annular seam of the two hemispheres. The welding adopts manual narrow-gap...

AI Technical Summary

Problems solved by technology

For the deep-sea pressure chamber, the layer of rubber seal is slightly thin, and the rubber seal ring is greatly affected by the underwater environment. Once the seal fails, it will pose a great threat to personal safety in deep sea; at the same time, due to the use of clamps and screws for fastening, When the pressure chamber is subjected to high pressure in the deep sea, a certain amount of deformation will occur, and the clamp retains its original shape due to the internal and external pressure of the seawater, and the screw locking device cannot re-lock the clamp, making the clamp It cannot be in close contact with the pressure chamber, which increases the possibility of separation of the upper and lower pressure chambers and water ingress, which poses a greater danger to the lives of deep-sea operators

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