Method for using secondary shield fastening device between 90-degree angle zone modules of Mark III type cargo tank

Abstract

The invention discloses a method for using a secondary shield fastening device between 90-degree angle zone modules of a Mark III type cargo tank. The device comprises a fixed frame, a fixed depression bar, a plane and a corner pressing system. The frame has a 90-degree included angle; a turning plate is used for connection at the corner; and thus the pressing system is installed at the corner. The plane and corner pressing system enable forces to be distributed on a pressed surface uniformly. The systems are connected by bolts; and the force on the pressed surface is adjusted by setting different torsion values. With a guiding rod, the force transmission process is stabilized. Therefore, the force applied to the peak of the 90-degree corner is identical with the forces applied to the plane at the two sides; the pressure controllability and integrity controllability during the pressing process after secondary shield bonding of the 90-degree angle zone are guaranteed; and thus the bonding work quality is improved.

Description

technical field [0001] The invention belongs to the field of construction of liquid cargo tanks of LNG ships, in particular to a Mark III type 90° angle area module secondary shielding fastening device, which can be used for pressure control in the process of secondary shielding adhesion at the 90° angle area. technical background [0002] Secondary shielding adhesion is an important content in the design of Mark Ⅲ type LNG carrier liquid cargo tank construction process. For the quality and strength of the adhesion, the current technology cannot achieve non-destructive inspection. Therefore, at present, the quality of the adhesion can only be guaranteed by strictly implementing the certified adhesion procedure, and the pressure parameter is one of them. Compared with the plane position, the position of the 90° angle area has its particularity. The force at the top position of the knuckle tends to be uneven, and the pressure parameters cannot be guaranteed to be the same as t...

AI Technical Summary

Problems solved by technology

For the quality and strength of the adhesion, the current technology cannot achieve non-destructive testing. Therefore, at present, the quality of the adhesion can only be guaranteed by strictly implementing the certified adhesion procedures, and the pressure parameter is one of them.

Compared with the plane position, the position of the 90° corner area has its particularity. The force at the top position of the knuckle is prone to uneven phenomena, and the pressure parameters cannot be guaranteed to be the same as the adhesion procedure, which may easily lead to unqualified construction quality.

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